CARRIER Package Units(both Units Combined) Manual L0606342

48TM016-028 L0606342

User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides

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48TM016-028

Single-Package Rooftop Units

Electric Cooling/Gas Heating

Installation, Start-Up and Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS ........................ 1

INSTALLATION .................................. 2-32

Step 1 -- Provide Unit Support ..................... 2

• ROOF CURB

• ALTERNATE UNIT SUPPORT

Step 2 -- Rig and Place Unit ....................... 2

• POSITIONING

• ROOF MOUNT

Step 3 -- Field Fabricate Ductwork ............... 11

Step 4 -- Make Unit Duct Connections ........... 11

Step 5 -- Install Flue Hood and Wind Baffle ...... 1;

Step 6 -- Trap Condensate Drain ................. 11

Step 7 -- Orifice Change .......................... 12

Step 8- Install Gas Piping ....................... 13

Step 9 -- Make Electrical Connections ........... 13

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• OPTIONAL NON-FUSED DISCONNECT

• OPTIONAL CONVENIENCE OUTLET

Step 10- Make Outdoor-Air Inlet

Adjustments ..................................... 16

• MANUAL OUTDOOR-AIR DAMPER

Step 11 -- Install Outdoor-Air Hood .............. 16

Step 12- Install All Accessories ............... 17

• MOTORMASTER® I CONTROL INSTALLATION

• MOTORMASTER V CONTROL INSTALLATION

Step 13- Adjust Factory-Installed Options ..... 19

•PREMIERLINK TM CONTROL

• ENTHALPY SWITCH/RECEIVER

• OUTDOOR ENTHALPY CONTROL

• DIFFERENTIAL ENTHALPY CONTROL

• OPTIONAL ECONOMISERIV AND ECONOMISER2

• ECONOMISERIV STANDARD SENSORS

• ECONOMISERIV CONTROL MODES

Step 14 -- Install Humidistat for

Optional MoistureMi$er TM Package ............ 31

START-UP .................................... 33-43

SERVICE ..................................... 43-50

TROUBLESHOOTING ......................... 51-56

INDEX ........................................... 57

START-UP CHECKLIST ........................ CL-I

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electric_d compo-

nents. Only trained and qualified service personnel should in-

stall, repaik or service ai>conditioning equipment.

Untrained personnel can perform basic maintenance func-

tions of cleaning coils and filters and replacing filtel.s. All other

operations should be performed by trained service personnel.

When working on air-conditioning equipment, obselwe precau-

tions in the literature, tags and labels attached to the unit, and

other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for unbrazing operations. Have

fire extinguishers available for _dl brazing operations.

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Electrical shock

could cause personal injury.

I. Improper installation, adjustment, alteration, service,

or maintenance can cause property &image, personal

injury, or loss of life. Refer to the User's Information

Manual provided with this unit for more details.

2. Do not store or use gasoline or other flammable

vapors and liquids in the vicinity of this or any other

appliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any

phone in your building.

3. IMMEDIATELY call your gas supplier from a neigh-

bor's phone. Follow the gas supplier's instructions.

4. If you cannot reach your gas supplier, c_fll the fire

department.

Disconnect gas piping from unit when pressure testing at

pressure greater than 0.5 psig. Pressures greater than

0.5 psig will cause gas valve damage resulting in haz_udous

condition. If gas valve is subjected to pressure greater than

0.5 psig, it must be replaced before use. When pressure

testing field-supplied gas piping at pressures of 0.5 psig or

less, a unit connected to such piping must be isohtted by

closing the manu_d gas valve(s).

IIMPORTANT: Units have high ambient operating limits. If I

limits are exceeded, the units will automatically lock the I

corupressor out of operation. Manual reset will be required

to restart the compressor:

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480016-01 Printed in U,S.A, Form 48TM-4SI Pg 1 3-06 Replaces: 48TM-3SI

INSTALLATION

Inspect unit for transportation damage. If &_mage is found,

file any claim with the transportation agency.

Step 1 -- Provide Unit Support

ROOF CURB -- Assemble and install accessory roof curb or

horizont_d a&tpter roof curb in accordance with instructions

shipped with this accessory. See Fig. I-2B. Install insulation,

cant strips, roofing, and counter flashing as shown. Ductwork

can be installed to roof curb or horizontal adapter roof curb be-

fore unit is set in place. Curb or a&tpter roof curb should be

level. This is necessary to permit unit drain to function proper-

ly. Unit leveling tolerance is + l/ir_ in. per linear fl in any direc-

tion. Refer to Accessory Roof Curb or Horizontal A&_pter

Roof Curb Inst_fllation Instructions for additional information

as required. When accessory roof curb or horizontal adapter

roof curb is used, unit may be installed on class A, B, or C roof

covering material.

IMPORTANT: The gasketing of the unit to the roof curb

or adapter roof curb is critical for a watertight se_d.

Inst_fll gasket with the roof curb or adapter as shown in

Fig. 2A and 2B. Improperly applied gasket can also

result in air leaks and poor unit performance.

ALTERNATE UNIT SUPPORT -- When the curb or adapter

cannot be used, install unit on a noncombustible surface. Sup-

port unit with sleepers, using unit curb support area. If sleepers

cannot be used, support long sides of unit with a minimum of

3 equally spaced 4-in. x 4-in. pads on each side.

Step 2 -- Rig and Place Unit-- Do not drop unit;

keep upright. Use spreader bars over unit to prevent sling or ca-

ble &image. Rollers may be used to move unit across a roof.

Level by using unit frmne as a reference; leveling tolenmce is _+

_/lr_in. per linem fl in any direction. See Fig. 3 for additional in-

formation. Unit operating weight is shown in Table 1.

Four lifting holes are provided in ends of unit base rails as

shown in Fig. 3. Refer to rigging instructions on unit.

NOTE: On 48TM028 units, the lower forklift braces must

be removed prior to setting unit on roof curb.

POSITIONING- Maintain clearance, per Fig. 4-6, _u'ound

and above unit to provide minimum distance from combustible

materials, proper airflow, and service access.

Do not install unit in an indoor location. Do not locate unit

air inlets near exhaust vents or other sources of contmninated

all: For proper unit operation, adequate combustion and venti-

lation air must be provided in accordance with Section 5.3 (Air

for Combustion and Ventilation) of the National Fuel Gas

Code, ANSI Z223.1 (American National Standards Institute).

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Ix)cate mechanical di'aft system flue assembly at least 4 il

from any opening through which combustion products could

enter the building, and at least 4 ft from any adjacent building.

When unit is located adjacent to public walkways, flue assem-

bly must be at least 7 11above grade. Ix)cate unit at least 10 1l

away from adjacent units.

ROOF MOUNT -- Check building codes for weight distri-

bution requirements. Unit operating weight is shown in

Table 1.

hlstructions continued on page ll.

14-314 _

NOTE: CRRFCURB013A00 is a fully factory preassembled hori-

zontal adapter and includes an insulated transition duct. The pres-

sure drop through the adapter curb is negligible.

For horizontal return applications: The power exhaust and baro-

metric relief dampers must be installed in the return air duct.

25%VENTAIR//

ECONOMIZER

HOOD

LOC -O P

HORIZONTAL SUPPLY

CURB (CRRFCURB013A00)

///

7TRANSITION DUCT

FULLYINSULATED

SUPPLYPLENUM

32_] _ _ 2"uXI_)RTTYP. /_ 11"11/NSUDL_TIsINy,

,!t]// STITCHWELDED/ STI,IK PINN?D & _UED

143/4"/ I I ZI23"

12" WIDE STANDING

SEAM PANELS

ACCESSORY CURB

PACKAGE NO. HEIGHT.

CRRFCURB013A00] (584) ]

DESCRIPTION

Pre-Assembled, Roof Curb,

Horizontal Adapter

Fig. 1 -- Horizontal Supply/Return Adapter Installation (48TM016-025)

'..,4

NOTES_

1 BOBff CLJRB ACCBB (}BY / Bi PPLD O[ AS7 v:q F';.

2. ]NBUtA[ED PANFL5_ I" THICK N_OPREkE CBArLn i¸¸//2 LB [}ENB[TY

3 D]MFNSi0NS IN ( ) AR _ iN Mil ]_ETEI_S_

4_ _:_:s_ DIRECT _0N OR A[i/ FI OW

NON. /4" X 4"

(32) X (102) _

IYP, 4 Pl C5

O" I

(44)

5' ? i/[6 =

(i703_

O' 3/4" /] SUL/>YEO PANEL O7i ]DE

(44J SUPPL Y AND RETURN

/(CRRFCUR_B] 2AO0 ONLY}

/i/4

DUCI .....

F I {) SUI>L D ,CAN/ SR]I >

SUP>L [ED)

Fig. 2A iRoof Curb Details i48TM016-025

ROOFCURB CURB

A CESSOR,NE,O.,OESC I.ION

RR'CUROO AO0.SO,,,.H,OH .... '-I

6 D 1/4" "

/ is/)6 t INSULA"_D PANEl

i//0_ I

i122621

I_3/'D 1

KEEP THIS ANEA CLEAR FOR POWER_I_

(CAS ENTRY FOR 6AS F_REB ROOPTOPS/ "i

NOTES:

I+ R_FCURB ACCESSORY IS SHIPPED DISASSEMBLED.

2. DIXENSlOUS IN (I ARE IN WILLIWETERS.

3. [222_DIRECTION OF AIRFLOW.

4. ROOF CURB: IG OA. )VA03-56} STEEL.

5. TO PREVENT TXE HAZARD OF STAONANT WATER BUILD-UP IN THE DRAIN PAN

OF fNZ INDOOR SECTION. UNIT CAN ONLY BE PITCHED AS SXOWU.

6. INSULATED PANELS: I" THICK NEOPRENE COATED 1-I12 LB DENSITY.

(2262)_ _ (iBB6/

i i14'

/32)

HEIGHT FRO_ TABLE

UPPLY OPEN'NG CURB

(/321

17 17!16 '1

J (584)

DI'_END[ONS (DECREES AND INCHES)

A B

UNIT DE6. IN. DEG. IN.

ALL .28 .45 .28 .43

MAX CURB LEVELING TOLERANCES:

FROM EDGE OF UNIT TO HORIZONTAL

_---COMPREBSOR AD

CO DENSER ENC

COR{)FNSATR BRAi_

NAIL

6ASEET

(SUPPLIED WITH CURB)

FIELD SUPPLIED

.COUNTER FLASHING

(FIELD SUPPLIEOi

ROOFING FELT

/(FIZLD SUPPLIED}

_-CANT STRIP

(FIELD SUPPLIEOi

ROOFINGMATERIAL

/(FIELD SUPPLIED)

NOM 5/4" X 41' TYP _ PLACES

Fig. 2B -- Roof Curb Details -- 48TM028

SPR DER RS

3'-7 1/2"

"DETAIL A"

RIGGING HOOK

UNIT BASE RAIL

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Refer to Fig. 4-6 for unit operating weights.

3. Remove boards at ends of unit and runners prior to rigging.

4. Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from

damage. Use bumper boards for spreader bars on all units.

5. Weights do not include optional economizer. Add 90 Ib (41 kg) for economizer weight.

6. Weights given are for aluminum evaporator and condenser coil plate fins.

All panels must be in place when rigging.

UNIT

48TM

016

020

025

028

MAXIMUM

SHIPPING WEIGHT

Ib kg

1875 850

1925 873

2035 923

2445 1109

DIMENSIONS

A B

ft-in, mm ft-in, mm

6-111_ 2121 4-0 1219

6-111_ 2121 3-2 964

6-111_ 2121 3-4 1016

Fig. 3 -- Rigging Details

........CO'_UERO Z/_'DA X+AI_HO 7 , ..................................... _ I O_ ............................................................

.... -+_ i -°,o "

(99) i _ _ 7 3/15" :_i" 4 5/ @fi_i" 4 /@_ 6>0" 3 15/ + /@" O" 5 15/5" i J b 8i1 _G 41 < i IU K 18i K 8 <@ [228 K (61) (070) i5 )

O" _. /_._ [ (04 ! (4 r [ 4_]) I /_ O( -l ;j._ ' '[ (1) .... ," ;_(g " " -j +

20t ! j j I _ _ - - -- /, '- j

[ Z i ;+ S v 4 ,/1[ _'

z i "--- _ s 09 J

........... ...... , .... i j j ?

,////_ _\ k :l i 11 1] /_'_',", _ l j l l l [ Oi_S ! _EF R TO PRINT :OR ROOF: CURB ACC:, OxY )]M:Ns 0 ]

[ _ _llk'lx/_i]/X ................ ' S /s/SC'S d ")In _SIONS /N ( S[_Z /N " I 1_ ZIPS.

i. _ RECI]O O! D R r )s

+m _2, O0 . D{UI_(RK 0 [l A AItD i) 1-0 E_S)RY RO0 (JR[ O\[Y.

.is S U Y ..... i | .]N[ Uq [£ARA 1:

})0_ _ _ 0[_3_ hO[ , i .R_R: 7"0 + (2 54) OR COL RE 0 AL. TIIS D E-]Oq CA B£

! ! AL x i L REDU EO TO 4"0" 21g F OPO T 05 PER" T 0 L EMOW_Ll s: o_ ' l l l l : + - ,+o_ +o.

J _............/_.._'_ ........._ _iKJ N J J 1 ./s°J '_ _ _ ° '°",w h r coM, s: U,_AC., OU_ ;:,s!N

• [ [ [} : 4'0 + ( g} [OR PR(P[_ (00[NI R CO. AIR [+Od.

/,,I ',"_" J ; ?I J 825 "h

• /1_* i[ I + " i J J .i I / mJ_](NJ; /;'0" 19} D (0 ]RO lOX '_OC[{J .

(1707 i _ ii) I?_3 I /_+ / • RIOHJ J} _ 4"0" I/ _) Oz_ P (P 0> RA] ]0 (J

VO\/i ..... 1 } i \ 'H_lq DAMP AO POWER EX"*M T 50 EQ iPP O.

'_/ t :_'_ "TOP: 8"0 _ (1829 TO ASOL,R PROPER CO DE!OER SN OPER,STIOP.

_-_ i •lOT 0 : 14 + (3) TO DOt'SJ +:1[ VR AOI5 WEN \0 [;1\6 CUR)

"' i (21 7)

j TYP CAL 4 COR\ER5 "00N_'OINoF)MiLE,OX ][): 3'0 + 9/45 TO U (R UN[ [ 5URFA ES,

J• O)KTRO[ OX ]D: i'6" 0 _ i0 LOK 0 COCR [{ WA[ , R

Oil R GROUN) [ SLRIA }S.

:J 2" 2 1, B+i "_" •iO(A (0 b OR JJR S} C] 0 NAY P_EVA[ .

I:j (i) i W TM EX EPI]ON O LEA /-!1 E OR IME ONDE/', R tOiL

_B TE OAMPER/>OdER EX AUST _ SATED k fOE # +

I:J \ /[<[O'AB! _ NC OR /q_(IC_,D RGJRE5 sO Cl AW41 _

I j ;_x_ 5 _ j J s, DiMNS]ONS #i/ FI/O_ !IOE CORN _ >_

ALL)W 0 5/_" ( #OH [ FO_ 0 ) COVER [R[ ) E DE,

I(i2F)

k_O'-ll 15/16"_

(303) " OORNI!R _ (?÷}

0'2"($/) S 718 O]# CONO[INiRiO K,O.

/(Z_) _ (22) (FIELD ?OWER)

i' 5/I[5"

(339) j

O" 5 _/ 6" i ................................................................................................................................................. bz) (466)

_e [ + +,:DwZ Z

z. J B_ROHETR C RFLTEF/>OWER FX AUST

[ ] c+,Y _ o C "y-

(7 ;;/i i _! EIsS } " N(

,%, :,,+. _}÷A+\

"/O//_ (4s_:l o" <so_°/4_ ; ..... (_(_ _. , _ :::: s :::h, _........................l

o ', ' o ." o _Ju \ _ +. _M oPo,_> (, _o_,," L_N t

A_ _ / ,,,, (73} I _7/;' O A K.O, (OONT:£OL) i _ .to, _) *

"'NO_CR OO]L 's lv., O"''''_ _ \ '" \, ,,,'o,,O,E /.t

_[_@ "/4 :? iIA \ tOq : ,, 3 ....... _/

kz_ _R _I ON Y .,, ,,= I _ ........................................................" 6 ........................................................4

Fig. 4 -- Base Unit Dimensions J48TM016,020

--4

TYP (4) PLC5

O'-3 7/B"

{££} 7!

(206) I

5"-7 3/16"

(1707)

CORNER8

BECTIOI

UNIf 5TD. UNIT ECON_EZER CORNER CORNER CORNER CORNER DIM A OlM B DIM C

FCORNERA I ] I I_ IolcIol I I I............

ro._s18,io,t ,T,o..........i,, oL....I....].....I.....I ]......I.....I

...... ,oLD................... _;#_i3._7-,._o-

0"-4 5/16

I_ " -- " NOT_'REFER TO PRINT FOR ROOF CUR3 ACCESSORY DIMENSIONS.

2 DO 2. OIMENSION5 IN {) ARE IN MILLIMETERS.

| | 3, _ CENTER OF GRAVITY,

I J]_ ,50 81A HOLE_ I ] 4. _ DIRECTION OF AIR FLOW.

X_ _2.3 6. MINIMUM CLEARANCE:|l_ TYPICAL S, DUCTWORK TO BE ATTACHED TO ACCESSORY ROOF CURB ONLY.

/ REAR: 7'0" (2134) FOR COIL REMOVAL. THIS DIMENSION CAN BE

/1 _ _.) _. FRoMREDUCEDTO 4"0" (1213) IF CONSITIONS PERMIT COILREMOVALTHETOP,

4"3 _ (1213) TO COMBUSTIBLE SURFACES, ALL FOUR SIDES (INCLUDES

BETWEEN UN T5

.1 1/4" D A HOLE LEFT SIDE: 4"0" (1219) FOR PROPER CONDENSER COIL AIR FLOW.

S'-11 7/8 TYPICAL FRONT: 4"0" (1219) FOR CONTROL BOX ACCESS,

(13275_.1[ _ _1 l/_yp R]GHT SLOE: 4'3" (1213)FOR PROPER OPERATION OF

<yis.B ;i OAMPERANOPOWEREX.AUSTIESOEOUIPPEO.

(1753) TYPICAL 4 CORNERS TOP_ G'O" (1823) TO ASSURE PROPER CONDENSER FAN OPERATION,

- -- 3OTTOM_ 14" (356) TO COMBUSTIBLE SURFACES (WHEN NOT USING CURB),

I_1 7"-2 1/8" CONTROL 30X 51DE! 3"0" (314) TO UNGROUNDED SURFACES,

NON-COMBUSTIBLE,

(2187) CONTROL 30X SIDE: 3'6" (057) TO BLOCK OR CONCRETE WALL5_ OR

OTHER GROUNDED SURFACES,

' LOCAL CODES OR JURISOtCTION MAY PREVAIL.

/ I I .... [,_._x_] I 7. WITH THE EXCEPTION OF CLEARANCE FOR THE CONDENSER COIL

} I I z -z )_ I _ I AND THE DAMPER/POWER EXHAUST AS 5TATEO IN NOTE #6, A

POWER EXHAUST 8_ 81MENSIONS ARE FROM OUTSI3E OF CORNER POST,

(ACCESSORY ONLY) ALLOW 0'-5/16" (B) ON EACH SIDE FOR TOP COVER DRIP EOOE,

O'-lO 3/15"

OUTDOOR 2_ DIA K_O_

COIL /(Sl)

C8RNER C _ I 3/8 _ DIA CONCENTRIC K_O_

(76) (3S_

D_2 1/4 _ H TO_

($7) _ u

3'-11 1/4"

(1200) t>.... -------- --.

!........! %_;;L._o,,,o-_-

(466)

VIEW Z-Z

BAROMETRIC RELIEF/POWER EXHAUST

(ACCESSORY ONLY)

TYP

0"-2

(51)

// /(457) O'-lO 1/4"/_L_

(260)

0'-2

COIL (102) {73)

0'-3 71B_

ALTERNATE RETURN (SB)

3/4" FPT DRAIN CONNECTION l'-3/1G_

(310}

(27) FAR SlOE ONLY 0'-2 liB'

(54)

\\ ._ _ _ o_

"\_s,8-_,_,3-O,ACONCENTR,C_O(B_)_(_S)(F,ELDPOWER)/--_O'-_FI _i _;°'

\_7,BOIAK.O.(CONTROL)__ ]\ (_8)_,_8IANOLE_ "I

\1 (22) " "- "

,,_.DIA,.o.{GASENTRY)_,0"NPT 3/ 0/0_)

(SB)

5"-6" 5ECTION A-A

(1676)

Fig. 5-- Base Unit Dimensions i 48TM025

I'-7

(504)

- O'-B 15/16" _"I_ Z'U2"O0 4 T 2270 L8 90 LB 532 LB 526 LB 569 LB 593 L8 4*-6" -7 I/4" '-I I/4

k.__. j_ NOTES 48TH028

i i

1, :REFER TO PRINT FOR ROOF CURB ACCESBORY DIMENSIONS,

2, DIMENSIONB IN () ARE IN MILLIMETERS.

,\,SOBIA DLE3. CENTENOFBOAV,TY.

--..q TYPICAL 4. _ DIRECTION OF AIR FLOW,

__L. ...... s.O00TNOR<TOOEATTAC.EOTOA=SSOOYROOFCUBOONLY.

•"'fYPTCAL ..... 6. MINIMUM CLEARANCE:

TYPICAL 4 CORNERS

0"-3"

0i2o2)

7'-2 1/8"

(2187) SECTION A-A 7.

REAR: 7'0" (2134) FOR COIL REMOVAL. THiS DIMENSION CAN BE

REDUCED TO 4"0* (1219) IF CONDITIONS PERMIT COIL REMOVAL

FROM THE TOP.

4'0" (1219) TO COMBUSTIBLE SURFACES, ALL FOUR BIDES (INCLUDES

BETWEEN UNITS.

LEFT 510E_ 4"0* (1219) FOR PROPER CONDEN5ER COIL AIR FLOW.

FRONT: 4"0" (1219) FOR CONTROL BOX ACCESS.

RIGHT SIDE= 4"0" (1219) FOR PROPER OPERATION OF

DAMPER AND POWER EXHAUST IF SO EOUIPPED.

TOP: S'O* (1829) TO ASSURE PROPER CONDENSER FAN OPERATION.

8OTTO\: 14" (355) TO COMBUSTIBLE SURFACES (WHEN NOT USING CURB).

CONTROL BOX SLOE! 3"0" (914) TO UNGROUNDED SURFACE5,

NON-COMBUSTIBLE.

CONTROL BOX SIDE_ 3"6* (1067) TO BLOCK OR CONCRETE WALLS, OR

OTHER GROUNDED SURFACES.

LOCAL CODES OR JURISDICTION MAY PREVAIL.

WITH THE EXCEPTION OF CLEARANCE FOR THE CONDEN5ER COIL

AND THE DAMPER/POWER EXHAUST AS STATED IN NOTE _6, A

REMOVABLE FENCE OR BARRICADE REOUIRE5 NO CLEARANCE.

B. DIMENSIONS ARE FROM OUTSIDE OF CORNER POST.

ALLOW 0'-5/16" (8) ON EACH 51DE FOR TOP COVER DRIP EDGE.

Do 0"-4"_

(102)

DIA HOLE

(127) (22) 0'-2_

'-II (51)(303) B*

0"-3 1/8 *_

ACCESS (567) AIR OR (79)

r_1,1o HOOD

1'-1 5115"

(339)

0"-3 7/16"

_- (87)

_ FO' -3'

8_[_ (75)

c467) O'-IO l 14" _--_

(260)

0"-2 7/B _

(73)

(lO2) 0"-3 7/B_

-ALTERNATE RETURN (98)

(99) 3/4" FPT DRAIN CONNECTION 1'-3/15%

(310)

TYP (4) 0"-2" TYP (27) FAR 51DE ONLY 0"-2 ltB "_j

(51) (54)

YO 2'-1 5/8"

813) ECONOMIZER OPENING "- " ,.

•

j_ _ Jl _ <ACC[_O_Y ONLY)

, ,._s(2#;

B,O"<,3,B"O,ACONCENTR,C<.O.p

X_718921_1 #K!3O_) ((EFoINFTLRDoLpOWER) 0;53"

_1 1,2172DIA K.O+ (GAS ENTRY) 314" NPT / "1(31/4 DIA HOLE

- (38) J

5" -6"

(1576)

Fig. 6iBase Unit Dimensions i48TM028

Table1-- Physical Data

UNIT 48TM 016D/F 020D/F 025D/F 028D/F

NOMINAL CAPACITY (tons) 15 18 20 25

OPERATING WEIGHT 1800 1850 1900 2270

Economizer 90 90 90 90

MoistureMi$er TM Dehumidification Package 40 40 40 40

COMPRESSOR/MANUFACTU RER Scroll, Copeland

Quantity...Model (Ckt 1, Ckt 2) 1...ZB94KC, I 1 ...ZR108KC, 1...ZB125KC, 1...ZRU140KC,*

1...ZR72KC 1...ZR94KC 1...ZR108KC 1...ZR144KC

Capacity Stages (%) 60, 40 I 55, 45 55, 45 50, 50

Number of Refrigerant Circuits 2 2 2 2

Oil (oz) (Ckt 1, Ckt 2) 85, 60 108, 81 108,106 138, 106

REFRIGERANT TYPE R-22

Expansion Device TXV

Operating Charge (Ib-oz)

c,rcu,t,, 198I 198I 19-11I 28-13

Circuit 2 13-8 19-2 13-14 25-10

CONDENSER COIL Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced,

Aluminum Pre-Coated, or Copper Plate Fins

Rows...Finslin. 4._15 I 4...15 I 4...15 I 3...15(2ceils)

Total Face Area (sq ft) 21.7 21.7 21.7 43.4

CONDENSER FAN Propeller Type

Nominal Cfm 10,500 I 10,500 14,200 21,000

Quantity...Diameter (in.) 3...22 I 3...22 2...30 6...22

Motor Hp...Rpm 1/2...1050 1/2...1050 1...1075 1/2...1050

Watts Input (Total) 1100 1100 3400 2200

EVAPORATOR COIL Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced or

Copper Plate Fins, Face Split

4...15 I 4...15 I 4...1517.5 17.5 17.5

Rows...Fins/in.

Total Face Area (sq ft)

EVAPORATOR FAN

Quantity...Size (in.)

Type Drive

Nominal Cfm

Motor Hp

Motor Nominal Rpm

Maximum Continuous Bhp

Motor Frame Size

Nominal Rpm High/Low

Fan Rpm Range

Motor Bearing Type

Maximum Allowable Rpm

Motor Pulley Pitch Diameter

MiniMax (in.)

Nominal Motor Shaft Diameter (in.)

Fan Pulley Pitch Diameter (in.)

Nominal Fan Shaft Diameter (in.)

Belt, Quantity...Type...Length (in.)

Pulley Center Line Distance (in.)

Speed Change per Full Turn of

Movable Pulley Flange (rpm)

Movable Pulley Maximum Full Turns

From Closed Position

Factory Speed

Factory Speed Setting (rpm)

Fan Shaft Diameter at Pulley (in.)

Low-Medium Static

High Static

2...12 x 12

Belt

6000

1745

6.13

184T

873-1021

1025-1200

2...12 x 12

Belt

7200

1745

5.90

184T

910-1095

1069-1287

I 4...1517.5

Centrifugal Type

2...12 x 12

Belt

8000

7.5

1745

8.7 [208/230, 575 v]

9.5 [460 v]

213T

1002-1151

1193-1369

Low-Medium Static

High Static

Low-Medium Static

High Static

Low-Medium Static

High Static

Ball

1550

4.9/5.9

11/8

9.4

8.0

17/1G

Ball

1550

4.9/5.9

11/8

9.4

8.0

17/16

1...BX...50

1...BX...48

1...BX...50

1...BX...48

Ball

1550

5.4/6.6

13/8

9.4

7.9

17/le

1...BX...53

1...BX...5O

Low-Medium Static

High Static

Low-Medium Static

High Static

13.3-14.8

6"*

3.5

965

1134

17/1G

13.3-14.8

8tt

3.5

1002

1178

17/16

14.6-15.4

6 _*

3.5

1120

1328

17/le

2...12 x 12

Belt

10,000

1740

10.2 [208/230, 575 v]

11.8 [480 v]

215T

1066-1283

1332-1550

Ball

1550

4.9/5.9

13/8

8.0

6.4

17/16

2...BX...5O

2...BX...47

14.6-15.4

61-1-

3.5

1182

1470

17116

LEGEND

Bhp -- Brake Horsepower

TXV -- Thermostatic Expansion Valve

*The ZRU140KC compressor is a tandem compressor, consisting of a ZR72KC (25% total

capacity) and a ZR68KC (24% total capacity).

1-Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator

coils; and Circuit 2 uses the upper portion of both coils.

**Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 11/2

turns open.

1-1-Pulleyhas 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 1/2turns

open.

***Rollout switch is manual reset.

1-tl-A Liquid Propane kit is available as an accessory.

'liThe 48TM028 unit requires 2-in. industrial-grade filters capable of handling face velocities up

to 625 ft/min (such as American Air Filter no. 5700 or equivalent).

NOTE: The 48TM016-028 units have a low-pressure switch (standard) located on the suction

side.

Table 1 -- Physical Data (cont)

UNIT 48TM

FURNACE SECTION

Rollout Switch Cutout Temp (F)***

Burner Orifice Diameter (in....drill size)

Natural Gas Std

Thermostat Heat Anticipator Setting (amps)

2081230, 575 v Stage 1

Stage 2

460 v Stage 1

Stage 2

Gas Input Stage 1

Stage 2

Efficiency (Steady-State) (%)

Temperature Rise Range

Manifold Pressure (in. wg)

Natural Gas Std

Liquid Propanettt AIt

Gas Valve Quantity

Gas Valve Pressure Range

in. wg

psig

Field Gas Connection Size (in.-FPT)

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

LOW=PRESSURE SWITCH (psig)

Cutout

Reset (Auto)

FREEZE PROTECTION THERMOSTAT (F)

Opens

Closes

OUTDOOR-AIR INLET SCREENS

Quantity...Size (in.)

016D/F 020D/F 025D/F 028D/F

19o

0.1285...30/0.136...29

0.98

0.44

0.80

0.44

172,000/225,000

230,000/300,000

18-45/20-80

3.3

5.5-13.5

0.235-0.487

3/4

19o

0.1285._30/0.136...29

0.98

0.44

0.80

0.44

206,000/270,000

275,000/360,000

18-48/20-50

3.3

5.5-13.5

0.235-0.487

3/4

19o

0.1285...30/0.136...29

0.98

0.44

0.80

0.44

206,000/270,000

275,000/360,000

15-45/20-50

3.3

5.5-13.5

0.235-0.487

3/4

190

0.1285...30/0.136...29

0.98

0.44

0.80

0.44

206,000/270,000

275,000/360,000

15-45_0-50

3.3

5.5-13.5

0.235-0.487

3/4

426

320

30 _+5

45 _+5

Cleanable

2...20 x 25 x 1

1...20 x 20 x 1

RETURN-AIR FILTERS Throwawayl]

Quantity...Size (in.) 4...20 x 20 x 2

4...16 x20 x 2

POWER EXHAUST 1/2 Hp, 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v)

LEGEND

Bhp -- Brake Horsepower

TXV -- Thermostatic Expansion Valve

*The ZRU140KC compressor is a tandem compressor, consisting of a ZR72KC (25% total

capacity) and a ZR68KC (24% total capacity).

1-Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator

coils; and Circuit 2 uses the upper portion of both coils.

**Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 11/2

turns open.

1-1-Pulleyhas 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 1/2 turns

open.

***Rollout switch is manual reset.

1-1-1-ALiquid Propane kit is available as an accessory.

'liThe 48TM028 unit requires 2-in. industrial-grade filters capable of handling face velocities up

to 625 ft/min (such as American Air Filter no. 5700 or equivalent).

NOTE: The 48TM016-028 units have a low-pressure switch (standard) located on the suction

side.

Step 3 -- Field Fabricate Ductwork -- Secure all

ducts to building structure. Use flexible duct connectors be-

tween unit and ducts as required. Insulate and weatherproof all

external ductwork, joints, and roof openings with counter

flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be in-

sulated and covered with a vapor barriel:

Step 4 -- Make Unit Duct Connections -- Unit

is shipped for thru-the-bottonl duct connections. Ductwork

openings tue shown in Fig. 1 and 4-6. Duct connections are

shown in Fig. 7. Field-fabricated concentric ductwork may be

connected as shown in Fig. 8 and 9. Attach all ductwork to roof

curb and roof cm#, basepans.

Step 5 -- Install Flue Hood and Wind Baffle --

Flue hood and wind baffle are shipped secured under main

control box. To install, secure flue hood to access panel. See

Fig. 10. The wind baffle is then installed over the flue hood.

NOTE: When properly installed, flue hood will line up with

combustion fan housing. See Fig. 11.

Step 6 -- Trap Condensate Drain -- See Fig. 12

for drain location. One 3/4-in. half coupling is provided inside

unit evaporator section for condensate drain connection. An

81/2-in. x 3/4-in. diameter and 2-in. x 3/4-in. diameter pipe nip-

ple, coupled to standard 3/4-in. diameter elbows, provide a

straight path down through hole in unit base rails (see Fig. 13).

A trap at least 4-in. deep must be used.

HEAT

SEE NOTE

[_AIR

OUT

NOTE: Do not drill in this area; damage to basepan may result in

water leak.

Fig. 7 -- Air Distribution -- Thru-the-Bottom

_HEAT

EXCHANGER

NOTE

\ \ /

\ X \ /

\ \ \ /

\\ % \\ \ I

\\ \ /

\ \\\ /

_SEENOTE

AIR OUT AIR IN AIR OUT

NOTE: Do not drill in this area; damage to basepan may result in

water leak.

Fig. 8 -- Concentric Duct Air Distribution

BAF/FLE

NOTE: Dimensions A, A', B, and B' are obtained from field-supplied

ceiling diffuser.

Shaded area indicates block-off panels.

Fig. 9 -- Concentric Duct Details

r I

\/-...

WIND

BAFFLE

FLUE

HOOD

COMBUSTION

FAN HOUSING

(INSIDE)

WIND BAFFLE

MOUNTING HOLES

Fig. 10-- Flue Hood Location

INDUCED DRAFT

MOTOR

COMBUSTION MAIN BURNER HEAT EXCHANGER

FAN HOUSING SECTION SECTION

Fig. 11 -- Combustion Fan Housing Location

\\\\\

\\\

\\\ \

\\\ &\\\\\\\

3/4" FPT DRAIN 1-3/8"

CONNECTION DRAIN HOLE

Fig. 12- Condensate Drain Details

(48TM016 Shown)

3/4" FPT

cC° -

BASE RAIL _-_1

2-1N. (FIELD-SUPPLIED) NIPPLE

3 _

8 1/2-1N. (FIELD- _-w

SUPPLIED) NIPPLE

Step 7 -- Orifice Change -- This unit is factory as-

sembledfor heating operation using natural gas at an elevation

from sea level to 2000 ft. This unit uses orifice type

LH32RFnnn, where "nnn" indicates the orifice size based on

drill size diameter in thousands of an inch.

HIGH ELEVATION (Above 2000 ft) -- Use accessory high

altitude kit when inst_dling this unit at an elewttion of 2000 to

7000 ft. For elevations above 7000 ft, refer to Table 2 to identi-

fy the correct orifice size for the elevation. See Table 3 for the

number of orifices requiled for each unit size. Purchase these

orifices from your local Carrier dealel: Follow instructions in

accessory Installation Instructions to install the correct orifices.

Table 2 -- Altitude Compensation*

ELEVATION (ft)

0-1,999

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

NATURAL GAS ORIFICEt

Low Heat High Heat

30 29

31 30

32 31

33 31

35 32

*As the height above sea level increases, there is less oxygen per

cubic foot of air. Therefore, heat input rate should be reduced at

higher altitudes. Includes a 4% input reduction per each 1000 ft.

1-Orifices available through your Carrier dealer.

Table 3 -- Orifice Quantity

UNIT ORIFICE QUANTITY

48TMD016 5

48TMD020,

48TMD024, 6

48TMD028,

48TMF016

48TMF020,

48TMF024, 7

48TMF028

CONVERSION TO LP (Liquid Propane) GAS -- Use acces-

sory LP gas conversion kit when converting this unit for use

with LP fuel usage for elevations up to 7000 ft. For elevations

above 7000 ft, refer to Table 4 to identify the conect orifice

size for the elewttion. See Table 3 for the number of orifices

required for each unit size. Purchase these orifices from your

loc_d Carrier dealel: Follow instructions in accessory Installa-

tion Instructions to inst_dl the correct orifices.

Table 4 -- LP Gas Conversion*

ELEVATION (ft)

0-1,999

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

LP GAS ORIFICE1-

*As the height above sea level increases, there is less oxygen per

cubic foot of air. Therefore, heat input rate should be reduced at

higher altitudes. Includes a 4% input reduction per each 1000 ft.

1-Orifices available through your Carrier dealer.

Fig. 13- Condensate Drain Piping Details

Step 8 -- Install Gas Piping -- Unit is equipped for

use with natmM gas. Installation must conform with loc_d

building codes or. in the absence of loc_d codes, with the

National Fuel Gas Code, ANSI Z223.1.

Install field-supplied manual gas shutoff valve with a l/s-in.

NPT plessure mp for test gage connection at unit. Field gas

piping must include sediment trap and union. See Fig. 14.

Do not pressure test gas supply while connected to unit.

Always disconnect union before servicing. Exceeding

maximum manifold pressure may cause explosion and

injury.

I IMPORTANT: Natural gas pressure at unit gas connec-

tion must not be less than 5.5 in. wg or greater than

13.5 in. wg.

Size gas-supply piping for 0.5-in. wg maximum pressure

drop. Do not use supply pipe sm_dler than unit gas connection.

MANUAL SHUTOFF

(FIELD SUP_ GAS

(118" NPT PLUG)

UNIT UNICORN _ "l-"-"_ S EDIME NT TRAP

Fig. 14-- Field Gas Piping

Step 9 -- Make Electrical Connections

FIELD POWER SUPPLY- Unit is factory wiled for volt-

age shown on nameplate.

When installing units, provide a disconnect per NEC

(National Electrical Code) of adequate size (Table 5).

All field wiring must comply with NEC and local

requirements.

Route power ground lines through control box end panel or

unit basepan (see Fig. 4-6) to connections as shown on unit

wiring diagram and Fig. 15.

The correct power phasing is critical in the operation of the

scroll compressols. An incorrect phasing will cause the

compressor to rotate in the wrong direction. This may lead

to premature compressor failure.

The unit must be electrically grounded in accor&mce with

local codes and NEC ANSI/NFPA 70 (National Fire Pro-

tection Association) to protect against fire and electric_d

shock.

Field wiring must confirm to temperature limitations for

type "T" wire. All field wiring must comply with NEC and lo-

cal requirements.

Transformer no. 1 is wired for 230-v unit. If 208/230-v unit

is to be mn with 208-v power supply, the transformer must be

rewired as follows:

1. Remove cap from red (208 v) wire.

2. Remove cap from orange (230 v) spliced wire.

3. Replace orange wire with led wire.

4. Recap both wires.

Be certain unused wires are capped. Failure to do so may

&Lmagethe transformers.

Operating voltage to compressor must be within voltage

range indicated on unit nameplate. On 3-phase units, voltages

between phases must be balanced within 2%.

Unit failure as a result of operation on improper line voltage

or excessive phase imbalance constitutes abuse and may cause

&_mage to electrical components.

FIELD CONTROL WIRING -- Install a Carrier-approved

accessory thermostat assembly according to inst_dlafion in-

structions included with accessory. Ix)cate thermostat assembly

on a solid interior wall in the conditioned space to sense aver-

age temperature.

Route thermostat cable or equivalent single leads of

colored wire from subbase termimds through conduit in unit to

low-voltage connections as shown on unit label wiring diagram

and in Fig. 16.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (Americ_m

Wire Gage) insulated wire (35 Cminimum). For 50 to 75 fl,

use no. 16 AWG insulated wire (35 C minimum). For over

75 ft, use no. 14 AWG insulated wire (35 Cminimum). All

wire larger than no. 18 AWG cannot be directly connected at

the thermostat and will require a junction box and splice at the

thermostat.

Set heat anticipator settings as follows:

VO LTAGE W1 W2

208/230,575 0.98 0.44

460 0.80 0.44

Settings may be changed slightly to provide a greater degree

of comfort for a particul_u installation.

.... I TBI

II FIELD l _ r-L-q

_II II I fill II_

| POWER I r-_ r-_

z_ SUPPLY

EQUIP GND

NOTE: The maximum wire size for TB1 is 2/0.

LEGEND

EQUIP -- Equipment

GND -- Ground

NEC -- National Electrical Code

TB -- Terminal Block

Fig. 15- Field Power Wiring Connections

OPTIONALNON-FUSEDDISCONNECT-- Onunitswith

theoptiomflnon-fuseddisconnect,incomingpowerwill be

wiredintothedisconnectswitch.RefertoFig.17forwiring

for 100and200ampdisconnectswitches.Unitswithan

MOCP(maximumovercurrentprotection)under100willuse

the100ampdisconnectswitch.UnitswithanMOCPover100

willusethe200ampdisconnectswitch.Refertotheapplicable

disconnectwiringdiagraln.

Topreventbleakageduringshipping,filedisconnecthan-

dleandshaftmeshippedandpackagedinsidetheunitcontrol

box.Installthedisconnecthandlebeforeunitoperation.Toin-

st_dlthe handle and shaft, perform the following procedme:

1. Open the control box door and remove the handle and

shaft from shipping location.

2. Ix_osen the Allen bolt located on the disconnect switch.

The bolt is located on the square hole and is used to hold

the shaft in place. The shaft cannot be inserted until the

Allen bolt is moved.

3. Insert the disconnect shaft into the squme hole on the dis-

connect switch. The end of the shaft is specially cut and

the shaft can only be inserted in the correct orientation.

4. Tighten the Allen bolt to lock the shaft into position.

5. Close the control box dool:

6. Attach the handle to the external access door with the two

screws provided. When the handle is in the ON position,

the handle will be vertical. When the handle is in the OFF

position, the handle will be horizontal.

7. Turn the handle to the OFF position and close the dool:

The handle should fit over the end of the shaft when the

door is closed.

8. The handle must be in the OFF position to open the con-

trol box door

OPTIONAL CONVENIENCE OUTLET-- On units with

optional convenience outlet, a 115-v GFI (ground fault inter-

rupt) convenience outlet receptacle is provided for field wiring.

Field wiring should be run through the 7/8-in. knockout pro-

vided in the basepan near the return air opening.

THERMOSTAT ASSEMBLY

JUMPER

ra n m m rarar

Cl _ Z Z I--

c_ m a_ O> m m

Fig. 16 -- Field Control Thermostat Wiring

UNIT WIRING 6T3 4T2 2TI LOAD

100 BLK, YEL. BLU.

AMP

f I

[N°N!;[;E;°;_cONNE_T J

FIELD POWER SUPPLY 5L3 3L2 1L1 LiNE

UNIT WIRING

200 BLK. YEL, BLU,

AMP

r ,tt, ,

[NON FUSED DISCONNECT LINE [

FIELD POWER 5UPPLY

NOTE The disconnect takes the place of TB-1 as shown on the unit wiring dia

gram label and the component arrangement label.

Fig. 17 -- Optional Non-Fused Disconnect Wiring

Table 5 -- Electrical Data

UNIT

48TM

016

020

025

028

NOMINAL VOLTAGE COMPRESSOR OFM IFM

VOLTAGE RANGE No, 1 No. 1A No, 2

(3 Ph, 60 Hz) Min Max RLA LRA RLA LRA RLA LRA Qt_/ Hp FLA leal Hp FLA

208/230 187 253 32.1 195 20.7 156 3 0.5

460 414 508 16.4 95 10 70 3 0.5

575 518 633 12 80 8.2 54 3 0.5

208/230 187 253 30.1 225 28.8 195 3 0.5

460 414 508 15.5 114 14.7 95 3 0.5

575 518 632.5 12.1 80 10.7 80 3 0.5

208/230 187 253 42 239 33.6 225 2 1

460 414 508 19.2 125 17.3 114 2 1

575 518 633 13.8 80.0 13.5 80.0 2 1.0

208/230 187.2 253 20.7 156 20.7 156 47.1 245 6 0.5

460 414 508 10 75 10 75 19.6 125 6 0.5

575 517.5 632.5 8.2 54 8.2 54 15.8 100 6 0.5

1.7 5.0 15.8/15.8

0.8 5.0 7.9

0.75 5.0 6.0

1.7 5.0 15.8/15.8

0.8 5.0 7.9

0.75 5.0 6.0

6.6 7.5 25.0/25.0

3.3 7,5 13.0

3.4 7.5 10.0

1.7 10.0 28.0/28.0

0.8 10.0 14.6

0.8 10.0 13.0

POWER COMBUSTION POWER

EXHAUST FAN MOTOR SUPPLY

FLA LRA FLA MCA MOCP*

0.57 82/82 110/110

4.6 18.8 0.57 86/86 110/110

0.30 41 50

2.3 6.0 0.30 43 50

0.57 31 40

2.1 4.8 0.57 34 40

0.57 87/87 110/110

4.6 18.8 0.57 92/92 110/110

0.30 44 50

2.3 6.0 0.30 47 60

0.57 34 40

2.1 4.8 0.57 36 40

0.57 124/124 150/150

4.6 18.8 0.57 129/129 150/150

0.30 61 80

2.3 6.0 0.30 63 80

0.57 48 60

2.1 4.8 0.57 50 60

0.57 138/138 175/175

4.6 18.8 0.57 143/143 150/175

0.30 64 80

2.3 6 0.30 66 80

0.57 54 60

2.1 4.8 0.57 56 70

LEGEND

FLA -- Full Load Amps

HACR -- Heating, Air Conditioning and Refrigeration

IFM -- Indoor (Evaporator) Fan Motor

LRA -- Locked Rotor Amps

MCA -- MinimumCircuitAmps

MOCP -- Maximum Overcurrent Protection

NEC -- National Electrical Code

OFM -- Outdoor (Condenser) Fan Motor

RLA -- Rated Load Amps

*Fuse or HACR circuit breaker.

c t oo

_IST_O

NOTES:

1. In compliance with NEC requirements for multimotor and combination

load equipment (refer to NEC Articles 430 and 440), the overcurrent pro-

tective device for the unit shall be fuse or HACR breaker. Canadian units

may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor wbere a pbase imbalance in supply voltage is

greater than 2%. Use the following formula to determine the percent

voltage imbalance.

% Voltage Imbalance

= 100 x max voltage deviation from average voltage

average voltage

Average Voltage = 452 + 464 + 455

EXAMPLE: Supply voltage is 460-3-60.

ABCAB = 452 v

(_ BC = 464 v

AC = 455 v

1371

=-- 3

= 457

Determine maximum deviation from average voltage.

(AB) 457 - 452 = 8 v

(BC) 464 - 457 = 7 v

(AC) 457 -458 = 2 v

Maximum deviation is 7 v.

Determine percent voltage imbalance.

% Voltage Imbalance = 100 x--457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum

allowable 2%.

I IMPORTANT: If the supply voltage phase imbalance is more than 2%, I

contact your local electric utility company immediately. I

Step 10 -- Make Outdoor-Air Inlet Adjust-

ments

MANUAL OUTDOOR-AIR DAMPER -- All units (except

those equipped with a factory-inst_dled economizer) have a

manual outdoor-air &lmper to provide ventilation ail:

Damper can be preset to admit up to 25% outdoor air into

return-air compartment. To adjust, loosen securing screws and

move &tmper to desired setting, then retighten screws to secure

damper (Fig. 18).

OUTDOOR-AIR HOOD AND

MOUNTING BRACKETS

25% ADJUSTABLE

AIR DAMPER

SECURING SCREWS

Fig. 18- Standard 25% Outdoor-Air

Section Details

Step 11 -- Install Outdoor-Air Hood

IMPORTANT: If the unit is equipped with the optional

EconoMiSerIV component, move the outdoor-air tempera-

ture sensor prior to installing the outdoor-air hood. See the

Optional EconoMiSerIV and EconoMiSer2 section for

more information.

BASE

UNIT

The outdoor-air hood is common to 25% air ventilation,

EconoMiSerIV and EconoMiSer2. If EconoMiSerIV or

EconoMiSer2 is used, all electric¢fl connections have been

made and adjusted at the factory. Assemble and install hood in

the field.

NOTE: The hood top panel, upper and lower filter retainel_,

hood &'ain pan, baffle (sizes 025 and 028), and filter support

bracket me secured opposite the condenser end of the unit. The

screens, hood side panels, remaining section of tilter suppori

bracket, seal strip, and htudware me in a package located

inside the return-air filter access panel (Fig. 19).

1. Attach seal strip to upper filter retainer. See Fig. 20.

2. Assemble hood top panel, side panels, upper filter retain-

el: and drgdn pan (see Fig. 21).

3. Secure lower filter retainer and support bracket to unit.

See Fig. 21. Leave screws loose on 025 and 028 units.

4. Slide baffle (sizes 025 and 028) behind lower filter retain-

er and tighten sclews.

5. Ix_osen sheet metal screws for top panel of base unit

located above outdoor-air inlet opening, and remove

screws for hood side panels located on the sides of the

outdoor-air inlet opening.

6. Match notches in hood top panel to unit top panel screws.

Insert hood flange between top panel flange and unit.

Tighten screws.

7. Hold hood side panel flanges flat against unit, and inst_fll

screws removed in Step 5.

8. Insert outdoor-air inlet screens and spacer in channel

created by lower filter retainer and filter support bracket.

FILTER

PACKAGE ANE

HOOD

COMPONENTS

RETURN-AIR

ACCESS PANEL

Fig. 19 -- Outdoor-Air Hood Component Location

.HOOD TOP PANEL

UPPER FILTER.

RETAINER X

SEAL B

Fig. 20 -- Seal Strip Location

BAFFLE

PAN

HOOD TOP

PANEL

LOWER FILTER

RETAINER

FILTER SUPPORT

BRACKET

HOOD SIDE

PANELS (2)

BAFFLE

(025 AND

028 ONLY)

LOWER

FILTER

RETAINER

BRACKET

HOOD DRAIN PAN

UPPER FILTER RETAINER

Fig. 21 -- Outdoor-Air Hood Details

Step 12 -- Install All Accessories -- After ;dl the

factory-installed options have been adjusted, inst;dl all field-

installed accessories. Refer to the accessory installation

instructions included with each accessory.

MOTORMASTER® I CONTROL INSTALLATION

(48TM016,020, and 028)

Install Field-Fabricated Wind Baffles -- Wind baftles must

be field-fabricated for all units to ensure proper cooling cycle

operation at low mnbient temperatures. See Fig. 22 for baffle

dettfils. Use 20-gage, galvanized sheet metal, or similar

conosion-resistant metal for baftles. Use field-supplied sclews

to attach baffles to unit. Screws should be 1/4-in. diameter and

-s/s-in. long. Drill required screw holes for mounting baffles.

To avoid dmnage to the refiigelant coils and electric_d com-

ponents, use recommended screw sizes only. Use care

when drilling holes.

Install Motormaster I Controls -- Only one Motormaster I

control is required for 48TM016 and 020 units. The 48TM028

requires 2 Motormaster I controls -- one for circuit 1 and

one for circuit 2. The Motormaster I control must be used in

conjunction with the accessory 0° F low ambient kit

(purchased sep_uately). The Motorlnaster [ device controls

outdoor fan no. 1 (and 4 on size 028 units) while outdoor fans

no. 2 and 3 (and 5 and 6 on 028 units) are sequenced off by the

Accessory 0° F Low Ambient Kit.

WIND

BAFFLE __

___CROSS BREAK

BAFFLETOP VIEW 1" (25)MIN--_

I= 80-+.02:(2o62t_°_----4

3/4"(19)(YYP)-_ _-

BAFFLEFRONTVIEW

NOTE: Dimensions in ( ) are in ram.

Fig. 22 -- Wind Baffle Details

_--Tt10" (254)

(TYP)

-- 40"

L (1016

_10" (254)

;- (rYP)

"-_-_I_15" (361)

j_ (rYp)

"1" (25) MIN

Accessoiw 0°F D_w Ambient Kit -- Install the accessory 0° F

low mnbient kit per instruction supplied with accessory.

Sensor Assembly -- Install the sensor assembly in the location

shown in Fig. 23.

Motor Mount- To ensure proper fan height, leplace the exist-

ing motor mount with the new motor mount provided with

accessory.

Trun._wmer (460 and 575-v Units On@) -- On 460 and 575-v

units, a transformer is required. The transformer is provided

with the accesso Uand must be field-installed.

Motormaster I Control -- Recommended mounting location is

on the inside of the panel to the left of the control box. The

control should be mounted on the inside of the panel, verti-

cally, with leads protruding from bottom of extrusion.

----..._.

i:I;o°o

i::_oOo°

i::_ooo°

:_:_o°o

l::_oOo°

:_:_o°o

l:l;ooo°

:_:_oo°o

i:I;ooo°

i::_oo°o

SENSOR--I:_o°O°

LOCAT,ON:_:_oCo

l:I:o°o°

I::_o°o

i::_o°o°

:_:_oo°o

i:I:o°O°

HAIRPIN END

48TM016

SENSOR-- ,_ o

LOCATION _ o

HAIRPIN END

48TM020

SENSOR

LOCATION

HAIRPIN END

48TM028

(Circuits 1and 2)

NOTE: All sensors are located on the eighth hairpin up from the

bottom.

Fig. 23 -- Motormaster® I Sensor Locations

MOTORMASTER® V CONTROL INSTALLATION

(48TM025 Only)

Install Field-Fabricated Wind Baftles -- Wind baftles must

be tield-fabricated for all units to ensure proper cooling cycle

operation at low ambient temperatures. See Fig. 22 for baffle

details. Use 20-gage, galvanized sheet metal, or similar

corrosion-resistant metal for baffles. Use field-supplied screws

to attach baffles to unit. Screws should be l/4-in, diameter and

s/g-in, long. Dill required screw holes for mounting baffles.

To avoid dmnage to the refiigerant coils and electrical com-

ponents, use recommended screw sizes only. Use cme

when di'illing holes.

Install Motormaster V Controls -- The Motormaster V

(MMV) control is a motor speed control device which adjusts

condenser fan motor speed in response to declining liquid

refrigerant pressure. A properly applied Motormaster V control

extends the operating range of air-conditioning systems and

permits operation at lower outdoor ambient temperatures.

The minimum mnbient temperatures at which the unit will

operate are:

TEMPERATURE OPERATING LIMITS -- F°(C°)

Standard Unit with I Unit with

Unit Low Ambient Kit I MMV Control

40 (4) 25 (-4) -20 (-29)

To operate down to the ambient telnpemtures listed,

Motorlnaster V controls (Fig. 24) must be added. Field-

fabricated and inst_dled wind baffles are also required for all units

(see Fig. 22). The Motormaster V control permits operation of

the unit to an ambient temperature of-20 F (-29 C). The control

regulates the speed of 3-phase fan motors that are compatible

with rite control. These motol_ zue factory installed.

See Table 6 for the Motorlnaster V control accessory

package usage. Table 7 shows applicable voltages and motors.

Replacement of fan motor IS NOT REQUIRED ON

CURRENT PRODUCTION UNITS since the control is

compatible with the factory-installed fan motors. Only field

wiring control is required.

Inst_dl the Motormaster V control per instructions supplied

with accessory.

FROM FUSE BLOCK

TOPRESSURE.

TRANSDUCER

60606

ii 1.2 i,,i

13B

12 13A I 13C

_'oc_ooo

m[ GI_)I/y[[

TO MOTOR(S)

Fig. 24 -- Motormaster® V Control

Table 6 -- Motormaster V Control Package Usage

UNIT VOLTAGE ITEM DESCRIPTION

208/230 CRLOWAMB015AOO

48TM016-028 460 CRLOWAMB016A0O

575 CRL©WAMBO17AOO

Table 7 -- Applicable Voltages and Motors

VOLTAGE COMPATIBLEMOTOR

208/230-3-60 HDS2AK654

460-3-60 HD52AK654

575-3-60 HD52GE576

Step 13 --Adjust Factory-Installed Options

PREMIERLINK TM CONTROL -- The PrelnierLink control-

ler is available as a special order from the facto Uand is

compatible with the Carrier Comfort Network® (CCN) sys-

tem. This control is designed to allow usel_ the access and abil-

fly to change factou-defined settings, thus expanding the func-

tion of the standmd unit control bomd. CmTier's diagnostic

standard tier display tools such as Navigator r_'_ device or

Scrolling Marquee can be used with file PremierLink

controllel:

The PremierLink controller (see Fig. 25) requires the use of

a CmTier electronic thermostat or a CCN connection for time

broadcast to initiate its internal timeclock. This is necessa Ufor

broadcast of time of day functions (occupied/unoccupied). No

sensors are supplied with the field-mounted PremierLink

control. The factory-installed PremierLink control includes

only the supply-air temperature (SAT) sensor and the outdoor

air temperature (OAT) sensor as standard. An indoor air quality

(CO2) sensor can be added as an option. Refer to Table 8 for

sensor usage. Refer to Fig. 26 for PremierLink controller

wiring. The PremierLink control may be mounted in the

control panel or an area below the control panel.

NOTE: PremierLink controller version 1.3 and later is shipped

in Sensor mode. If used with a thermostat, the PremierLink

controller must be configured to Thermostat mode.

Install the Supply Air Temperature (SAT) Sensor -- When

the unit is supplied with a factou-mounted PremierLink con-

trol, the supply-tdr temperature (SAT) sensor (33ZCSENSAT)

is factory-supplied and wired. The wiring is routed fi_m the

PremierLink control over the control box, through a grommet,

into the fan section, down along the back side of the fan, and

_dong the fan deck over to the supply-air opening.

The SAT probe is wire-tied to file supply-air opening (on the

horizontal opening end) in its shipping position. Remove the

sensor for installation. Re-position the sensor in the flange of

the supply-air opening or in the supply air duct (as required by

local codes). Drill or punch a l/2-in, hole in the flange or duct.

Use two field-supplied, self-drilling screws to secme the sensor

probe in a horizontal orientation.

NOTE: The sensor must be mounted in the dischmge airstream

downstream of the cooling coil and any heating devices. Be

sure the probe tip does not come in contact with any of the unit

or heat surfaces.

Outdoor Air Temperature (OAT) Sensor -- When the unit is

supplied with a factory-mounted PremierLink control, the

outdoor-air temperature sensor (OAT) is factory-supplied and

wired.

Install the Indoor Air Quality (CO2) Sensor -- Mount the

optional indoor air quality (CO2) sensor according to manufac-

turer specifications.

A sepmate field-supplied transformer must be used to

power the CO2 sensol:

Wire the C(_ sensor to the COM and IAQI terminals of J5 on

file PremierLink controflel: Refer to file PremierLink Installa-

tion, Start-up, and Configuration Instructions for detailed wiring

and configuration information.

HVACSENSOR INPUTS O

SPACE'rEMP_ h'q'

SET POINT -._._ L=]_ I

SUPPLY AIR TEMP _ _lil

OUTDOOR TEMP _ Ili]

INDOOR AIR QUALITY _ LT_

OUTDOOR AIR QUALITY _ _!]

DUAL MODE SENSOR (STAT) IJ_

7H: I

COMP SAFETY (Y1) /'_H ; ]

FIRE SHUTDOWN (Y2) /

SUPPLY FAN STATUS (Wl) Ja"H i I

NOT USED (W2) "/'r Iq • I

ENTHALPY STATUS (ENTH) ../_]_ltot

CCN/LEN

PORT

0¢

................................

TS_T_

_ _ _ o Premiertink _.2_.,

. _' I .... [--]

,,r"l ,o i-Ior__ ,,= . I ,,-°_-- I I

°°' - I [] FTfil U'_l-GqEZZ]hi"W'q_t_'T_q-_f!

,/i1[=-°.--toltio-q.t

/)I 4 20MA/ t'_ "_._ '_

NAVIGATOR - INDOOR COMPR HEAT EXHAUST

PORT ECONOMIZER FAN MOTOR 1 & 2LOW/HIGH RVS VALVE

OUTPUTS

Fig. 25 -- PremierLink Controller

SAT

OAT

DDC CONTROL

CMP SAFE

FSD

SFS

,_ BLUE

BRN

BLK

GRN ..... t BRN

_ _ PL1 - 5 BRN • ORN BRN

_ PL1 - 6 VIO VIO

BRN

RED --

BLu _@ _ ....BLO

Pi K GRN RED

-- YEL i

RED

BLU

RED

WHT

RED

PNK

R TSTAT CONTROL

Y1 Y1

Y2 Y2

Wl Wl

CLO1

-- Y1

W2 -- -- --

TB2

RED

ni!

IlL-

_LU

_RN

_LK

COM

_R_ CON

BRN tOM

RE_ _

NOT USED W2 W2

RMTCCC G G

C C C

X X X

TB21-

COM

[oc

CONTROL

GRN_

RED

YEL

RED

_LU

£EO FT FSD

WHT

REDT _

OaN

RED

NOT[

ECONO USED

PremierLink

Control

Fig. 26 --Typical PremierLink TM Controls Wiring

@CLO -- Compressor Lockout

CMP -- Compressor

ECONO-- Economizer

ENTH -- Enthalpy Sensor

IGC -- Integrated Gas Unit Controller

MGV -- Main Gas Valve

OAT -- Outdoor Air Temperature Sensor

PL -- Plug

SAT -- Supply Air Temperature Sensor

SPT -- Space Temperature Sensor

TB -- Terminal Block

*If PremierLink control is in thermostat mode.

1-TB2 terminal designations for 24 vac discrete

inputs. Default is for DDC control.

ECONOMIZER

50TJ401148

(CRECOMZROIOB00)

4-20rr_

3ECONO

1 MOTOR

.....

'_THEFIELDTAT _] I C_ _ (_

Y_ _ FRONM]_4V _T F!R_1i Fii i iiiM_r rviRvl_O_2 _C'_DR

=_) FROM_Qc-a LEGEND

Table 8 -- PremierLink TM Sensor Usage

APPLICATION OUTDOOR AIR RETURN AIR OUTDOOR AIR RETURN AIR

TEMPERATURESENSOR TEMPERATURESENSOR ENTHALPY SENSOR ENTHALPY SENSOR

Differential Dry Bulb

Temperature with Required --

PremierLink* Included -- 33ZCT55S PT -- --

(PremierLink HH79NZ039

requires 4-20 mA or Equivalent

Actuator)

Single Enthalpy with Required --

PremierLink* Included -- 33CSENTHSW

(PremierLink Not Used -- (HH57ZC003) --

requires 4-20 mA or

Actuator) HH57AC077

Differential Enthalpy Required -- Required-

with PremierLink* Included -- 33CSENTHSW 33CSENTSEN

(PremierLink Not Used -- (HH57ZC003) or

requires 4-20 mA or HH57AC078

Actuator) HH57AC077

*PremierLink control requires supply air temperature sensor 33ZCSENSAT and

outdoor air temperature sensor HH79NZ039 -- Included with factory-installed PremierLink control;

field-supplied and field-installed with field-installed PremierLink control.

NOTES:

1. CO2 Sensors (Optional):

33ZCSENCO2 -- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.

33ZCASPCO2 -- Aspirator box used for duct-mounted CO2 room sensor.

33ZCT55CO2 -- Space temperature and CO2 room sensor with override.

33ZCT56CO2 -- Space temperature and CO2 room sensor with override and setpoint.

2. All units include the following standard sensors:

Outdoor-air sensor -- 50HJ540569 -- Opens at 67 F,closes at 52 F, not adjustable.

Mixed-air sensor -- HH97AZ001 -- (PremierLink control requires supply air temperature sensor 33ZCSENSAT

and outdoor air temperature sensor HH79NZ039)

Compressor lockout sensor -- 50HJ540570 -- Opens at 35 F, closes at 50 E

ENTHALPY SWITCH/RECEIVER -- The accessory en-

thalpy switch/receiver (33CSENTHSW) senses temperature

and humidity of the air surrounding the device trod calculates

the enthalpy when used without an enthalpy sensol: The relay is

energized when enth_flpy is high and deenergized when

enthalpy is low (based on ASHRAE [American Society of

Heating, Refrigeration and Air Conditioning Engineersl 90.1

criteria). If an accessory enthalpy sensor (33CSENTSEN) is

attached to the return air sensor input, then differential enthalpy

is c_flculated. The relay is energized when the enthalpy detected

by the leturn air enthalpy sensor is less than the enth_flpy at the

enthalpy switchheceivel: The relay is deenergized when the

enth_flpy detected by the leturn air enthalpy sensor is gleater

than the enthalpy at the enflmlpy switch/receiver (differential

enth_flpy control). See Fig. 27 and 28.

OUTDOOR ENTHALPY CONTROL (Fig. 29) -- Out-

door enthalpy control lequires only an enth_flpy switch/

receiver (33CSENTHSW). The enthalpy switch/receiver is

mounted in the outdoor air inlet and c_dculates outdoor air

enthalpy. The enthalpy switch/receiver energizes the relay

output when the outdoor enth_flpy is above 28 BTU/Ib OR din

bulb temperature is above 75 F and is deenergized when

the outdoor enthalpy is below 27 BTU/Ib AND dry bulb

temperature is below 74.5 E The relay output is wired to the

unit economizer which will open or close depending on the

output of the switch.

NOTE: The enthalpy calculation is done using an average

altitude of 1000 ft above sea level.

Mounting -- Mount the enthalpy switch/receiver in a location

where the outdoor air can be sampled (such as the outdoor air

intake). The enthalpy switch/receiver is not a NEMA 4

(Natiomd Electrical Manufacturers Association) enclosure and

should be mounted in a location that is not exposed to outdoor

elements such as rain or snow. Use two field-supplied no. 8 x

3/4-in. TEK screws. Insert the screws through the holes in the

sides of the enthalpy switch/receivel:

Wiring -- Cmrier recommends the use of 18 to 22 AWG

(American Wire Gage) twisted pair or shielded cable for all

wiring. All connections must be made with l/4-in, female spade

connectors.

A 24-vac transformer is required to power the enthalpy

switch/receiver; as shown in Fig. 29. the PremierLink TM board

provides 24 vac. Connect the GND and 24 VAC terminals on

the enthalpy switch/receiver to the terminals on the transform-

er. On some applications, the power from the economizer

harness can be used to power the enthalpy switch/receivel: To

power the enthalpy switch/receiver from the economizer

harness, connect power of the enthalpy switch/receiver to the

red and brown wires (1 and 4) on the economizer harness.

For connection to rooftop units with PremierLink TM control,

connect the LOW Enthalpy terminal on the enthalpy switch/

receiver to J4 -- pin 2 of the PremierLink control on the

HVAC unit. The switch can be powered through the Premier-

Link control board if desired. Wire the 24 VAC termimfl on the

enth_flpy switch/receiver to J4 -- pin 1 on the PremierLink

control. Wire the GND terminal on the enthalpy switch/

receiver to Jl -- pin 2 on the PremierLink control. The HI

Enth_flpy terminal is not used. See Fig. 29.

25"----

_.35rnm)

4253"

(108 03mm)

,25"

(6.35mm)

4 253"

(I 08 03rnm)

c _

Fig. 27 -- Enthalpy Switch/Receiver Dimensions

(33CSENTHSW) Fig. 28 -- Enthalpy Sensor Dimensions

(33CSENTSEN)

O O €

{..........................I

__ I TS_A_rC_ i

BLU _ _

-4= I PartNumber; 33CSPREMLK

Bu<L.----a_ .4 iya. - , .

,-o 1o! Prem,erLznk_,._,

.... __=22_c_.L%. -/(/ _

................._-____. _,, _ _ _ .._ _ .,__ _o ,,,,.. ,_ _ ,,.o

,_1 J2 RAq4 o J_ -_ Ja

[] Or_E_ I ..... eI ...... I ...... I

........ l(OR UNIT GROUND)

*Used with Differential Enthalpy Control only.

Fig. 29 -- Typical Wiring Schematic -- Carrier Rooftop Unit with PremierLink TM Controls

DIFFERENTIAL ENTHALPY CONTROL (Fig. 30) --

Diffemnti_d enthalpy control mquiles both an enth_dpy switch/

receiver (33CSENTHSW) and an enth_dpy sensor

(33CSENTSEN). The enthalpy switchheceiver is mounted in

the outdoor air inlet and calculates outdoor air enthalpy. Tile

enthalpy sensor is mounted in the return airstream and c_flcu-

lates the enthalpy of the indoor all:

The enthalpy switch/receiver enelgizes the HI Enthalpy

relay output when file outdoor enthalpy is gleater than the

indoor enth_flpy. The LOW Enthalpy terminal is energized

when the outdoor enthalpy is lower than the indoor enthalpy.

The relay output is wired to the unit economizer which will

open or close depending on the output of the switch.

NOTE: The enthalpy calculation is done using an average

altitude of 1000 fl above sea level.

Mounting -- Mount the enthalpy switch/receiver in a location

where the outdoor air can be sampled (such as the outdoor air

intake). The enthalpy switch/receiver is not a NEMA 4 enclo-

sure grad should be mounted in a location that is not exposed to

outdoor elements such as rain, snow. or dilect sunlight. Use

two field-supplied no. 8 x 3/4-in. TEK screws. Insert the screws

through the holes in the sides of the enthalpy switclffreceivel:

Mount the enthalpy sensor in a location whele the indoor air

can be smnpled (such as the return air duct). The enthalpy

sensor is not a NEMA 4 enclosure and should be mounted in a

location that is not exposed to outdoor elements such as rain or

snow. Use two field-supplied no. 8 x 3/4-in. TEK screws. Insert

the screws through the holes in the sides of the enthalpy sensol:

Wiring -- Carrier recommends the use of 18 to 22 AWG

twisted pair or shielded cable for all wiring. All connections

must be made with 1/4-in. female spade connectors.

The PremierLink TM bom'd provides 24-vac to power the

enthalpy switch/receivel: Connect the GND and 24 VAC

terminals on the enthalpy switch/receiver to the terminals on

120 VAC

LINE VOLTAGE

_a....A....AJ--

the transformer On some applications, the power from the

economizer hmness can be used to power the enthalpy switch/

receivec To power the enthalpy switch/receiver from the econ-

omizer hmness, connect power of the enthalpy switch/receiver

to the led and brown wires (1 and 4) on the economizer

harness.

Connect the LOW Enthalpy terminal on the enthalpy

switch/receiver to J4 -- pin 2 of the PlemierLink control on the

HVAC unit. The switch can be powered through the Premier-

Link control board if desired. Wire the 24VAC terminal on the

enthalpy switclffreceiver to J4 -- pin 1 on the PremierLink

control. Wire the GND terminal on the enthalpy switch/

receiver to Jl -- pin 2 on the PremierLink control. The HI

Enthalpy terminal is not used. See Fig. 29.

Connect the 4-20 mA IN terminal on the enthalpy switch/

receiver to the 4-20 mA OUT terminal on the return air

enthalpy sensol: Connect the 24-36 VDC OUT terminal on the

enthalpy switch/receiver to the 24-36 VDC IN terminal on the

return air enthalpy sensor. See Fig. 30.

Enthalpy Switch/Receiver Jumper Settings -- There are two

jumpers. One jumper determines the mode of the enthalpy

switch/receivel: The other jumper is not used. To access the

jumpers, lemove the 4 screws holding the cover on the

enthalpy switclffreceiver and then remove the covel: The

factory settings for the jumpel.'s are M 1 and OFF.

The mode jumper should be set to M2 for differential

enthalpy control. The factory test jumper should lemain on

OFF or the enthalpy switch/receiver will not calculate enthalpy.

Enthalpy Sensor Jumper Settings -- There are two jumpers.

One jumper determines the mode of the enthalpy sensol: The

other jumper is not used. To access the jumpel.s, remove the

4 screws holding the cover on the enthalpy sensor and then

remove the covel: The factory settings for the jumpers are M3

and OFF.

24 VAC OUTPUT FROM N/C CONTACT WHEN THE

OUTDOOR ENTHALPY IS LESS THAN THE

INDOOR ENTHALPY _ ORN

(ENABLE ECONOMIZER)

24 VAC OUTPUT FROM N/O CONTACT WHEN THE 4-

INDOOR ENTHALPY IS GREATER THAN THE

OUTDOOR ENTHALPY

HI LOWGND 24

ENTHALPY VAC

[

4-20 24-36

mA VDC

IN OUT

_ 33CSENTHSW

24-36 4-20

VDC mA

IN OUT

"_, 33CSENTSEN

LEGEND

N/C -- Normally Closed

N/O -- Normally Open

JUMPER SETTINGS FOR 33CSENTHSW

O o on

(DO

o] Iloooo

(DII(D

Fig. 30 -- Differential Enthalpy Control Wiring

JUMPER SETTINGS FOR 33CSENTSEN

O o on

[ °°I °o°o°

11oo 11o

The mode jumper should be set to M3 for 4 to 20 mA

output. The factory test jumper should remain on OFF or the

enthalpy sensor will not calculate enthalpy.

ENTHALPY SENSORS AND CONTROL -- The enthalpy

control (HH57AC077) is supplied as a field-installed accessory

to be used with tile EconoMiSer2 damper control option. Tile

outdoor air enthalpy sensor is part of the enthalpy control. The

separate field-installed accessory return air enthalpy sensor

(HH57AC078) is required for differential enthalpy control.

NOTE: The enthalpy control must be set to the "D" setting for

differential enthalpy control to work properly.

The enthalpy control receives the indoor and return

enthalpy from the outdoor and return air enthalpy sensors and

provides a dry contact switch input to the PremierLink TM

controllec Locate the controller in place of an existing econo-

mizer controller or near the actuatol: The mounting plate may

not be needed if existing bracket is used.

A closed contact indicates that outside air is prefened to the

return aic An open contact indicates that the economizer

should remain at minimum position.

Outdoor Air Enthalpy Sensor/Enthalpy Controller

(HH57AC077) -- To wire the outdoor air enthalpy sensor.

perform the following (see Fig. 31 and 32):

NOTE: The outdoor air sensor can be removed from the back

of the enthalpy controller and mounted remotely.

1. Use a 4-conductor: 18 or 20 AWG cable to connect the

enthalpy control to the PremierLink controller and power

tmnsformec

2. Connect the following 4 wires from the wire hmness

located in rooftop unit to the enthalpy controller:

a. Connect the BRN wire to the 24 vac terminal (TRI)

on enthalpy control and to pin 1 on 12-pin harness.

b. Connect the RED wire to the 24 vac GND terminal

(TR) on enthalpy sensor and to pin 4 on 12-pin

harness.

c. Connect the GRAY/ORN wire to J4-2 on Premier-

Link controller and to terminal (3) on enthalpy

sensoE

d. Connect the GRAY/RED wire to J4-1 on Premier-

Link controller and to terminal (2) on enthalpy sensol:

NOTE: If installing in a Carrier rooftop, use the two gray wires

provided from the control section to the economizer to connect

PremierLink controller to terminals 2 and 3 on enth_dpy sensol:

Return Air Enthalpy Sensor -- Mount the return-air enthalpy

sensor (HH57AC078) in the return-air duct. The return air

sensor is wired to the enth_dpy controller (HH57AC077). The

outdoor enth_dpy changeover set point is set at the controller.

To wire the return air enthalpy sensol: perform the follow-

ing (see Fig. 31 ):

1. Use a 2-conductor. 18 or 20 AWG. twisted pair cable to

connect the return air enthalpy sensor to the enthalpy

controller.

2. At the enthalpy control remove the factory-installed

resistor from the (SR) and (+) termin;ds.

3. Connect the field-supplied RED wire to (+) spade

connector on the return air enthalpy sensor and the (SR+)

terminal on the enth_flpy controllel: Connect the BLK

wire to (S) spade connector on the return air enthalpy

sensor and the (SR) terminal on the enthalpy controllo:

OPTIONAL ECONOMISERIV AND ECONOMI$ER2 --

See Fig. 33 and 34 for EconoMiSerlV component locations.

See Fig. 35 for EconoMiSer2 component locations.

NOTE: These instructions are for installing the optional

EconoMiSerlV and EconoMiSer2 only. Refer to the accessory

EconoMiSerIV or EconoMiSel2 installation instructions when

field installing an EconoMiSerIV or EconoMiSer2 accessory.

ENTHALPY CONTROLLER RED

A(_C TRr'_TR 1[_- BRN

sol:3 ÷l-q

sRrh +H---q '

LED

-_S (OUTDOOR

AIR

+ ENTHALPY

BLK SENSOR)

RED

I--IS (RETURN AIR

F[ + ENTHALPY

-- SENSOR)

GRAY/ORN

LWIRE HARNESS

GRAY/RED JIN UNIT

NOTES:

1. Remove factory-installed jumper across SR and + before con-

necting wires from return air sensor.

2, Switches shown in high outdoor air enthalpy state. Terminals 2

and 3 close on low outdoor air enthalpy relative to indoor air

enthalpy,

3. Remove sensor mounted on back of control and locate in out-

side airstream.

Fig. 31 -- Outdoor and Return Air Sensor Wiring

Connections for Differential Enthalpy Control

HH57AC077

ENTHALPY

CONTROLAND

OUTDOOR AIR

ENTHALPY SENSOR

HH57AC078 ENTHALPY

SENSOR(USED WITH

ENTHALPY CONTROL

FOR DIFFERENTIAL

ENTHALPY OPERATION)

÷ ÷ MOUNTING PLATE

Fig. 32 -- Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

To complete inst_dlation of the optional EconoMiSerIV. per-

form the following procedure.

1. Remove the EconoMiSerIV hood. Refer to Step 11 --In-

stall Outdoor-Air Hood on page 16 for information on

removing and installing the outdoor-air hood.

2. Relocate outdoor air temperature sensor from shipping

position to operation position on EconoMiSerIV. See

Fig. 33.

IMPORTANT: Failure to relocate tile sensor will result in

the EconoMiSerIV not operating properly.

3. Reinst_dl economizer hood.

4. Install all EconoMiSerIV accessories. EconoMiSeltV

wiring is shown in Fig. 36. EconoMiSer2 wiring is shown

in Fig. 37.

OutdoorairleakageisshowninTable9.Returnairpressure

dropisshowninTable10.

Table 9 -- Outdoor Air Damper Leakage

DAMPER STATIC PRESSURE (in. wg)

0.2 0.4 0.6 0.8 1.0 1.2

LEAKAGE(cfm) 35 53 65 75 90 102

Table 10- Return Air Pressure Drop (in. wg)

CFM

4500 5000 5400 6000 7200 7500 9000 10,000 11,250

0.040 0.050 0.060 0.070 0.090 0.100 0.110 0.120 0.140

FRAME ECONOMI$ER2 SCREWS

SCREWS" _): 1 _f'_

Fig. 35 -- EconoMiSer2 Component Locations

SCREWS ECONOMI$ERIV

OUTDOOR AIR

TEMPERATURE SENSOR

FRAME SCREWS (INSTALLED OPERATION

i_j_ ' POSITION)

LOW TEMPERATURE

COMPRESSOR

LOCKOUT SWITCH

Fig. 33--EconoMi$erlVComponent Locations--

End View

SUPPLY AIR

TEMPERATURE SENSOR

LOCATION

ECONOMI$ERIV

FLANGE

(HIDDEN)

Fig. 34-- EconoMi$erlV Component Locations--

Side View

ECONOMISERIV STANDARD SENSORS

Outdoor Air Temperature (OAT) Sensor -- The outdoor air

temperature sensor (HH57AC074) is a 10 to 20 mA device

used to measure the outdoor-_dr temperature. The outdoor air

temperature is used to determine when the EconoMiSerIV c_m

be used for free cooling. The sensor must be field-relocated.

See Fig. 33. The operating range of temperature measurement

is 40 to 100 E

Supply Air Temperature (SAT) Sensor -- The supply air

temperature sensor is a 3 K thermistor located at the inlet of the

indoor fan. See Fig. 34. This sensor is factory installed. The op-

erating range of temperature measurement is 0 ° to 158 E See

Table 11 for sensor temperature/resistance values.

The temperature sensor looks like an eyelet terminal with

wires running to it. The sensor is located in the "crimp end"

and is sealed from moisture.

Ix)w Temperature Compressor Lockout Switch -- The Econo-

MiSerIV is equipped with an mnbient temperatme lockout

switch located in the outdoor aiLstremnwhich is used to lockout

the complessoLs below a 42 F mnbient temperatme. See Fig. 33.

Table 11 -- Supply Air Sensor Temperature/

Resistance Values

TEMPERATURE (F) RESISTANCE (ohms)

-58 200,250

-40 100,680

-22 53,010

-4 29,091

14 16,590

32 9,795

50 5,970

68 3,747

77 3,000

86 2,416

104 1,597

122 1,080

140 746

158 525

176 376

185 321

194 274

212 203

230 153

248 116

257 102

266 89

284 70

302 55

TO MAIN

CONTROL

B0x

PLI "R

e- (NOT USED)

PL1-9

PL1-8

(

PL1-5

PLI=I

(

PDT_R

P_I"10

(NOT USED)

LEGEND

DCV -- Demand Controlled Ventilation

IAQ -- Indoor Air Quality

LALS-- Low Temperature Compressor

Lockout Switch

OAT -- Outdoor-Air Temperature

POT -- Potentiometer

YZL

PNK

BLU

RED

-- OR N

,.ELD i E,R

ACCESSORY} [] SET

RZWOTE I_IN

POSITION POT BLK 2V IDV

DISCHARGE AIR _ _.li_

SENSOR {Sk O_m) POS

oPE,

L_BEK ----I_R A-

I FIELD II_STALLED _ _----] []DCA_

I IAQSENSOR.J;,"_.l (. )IRV IRV

I ERTOA_ 0_V T

I I L___,LT" l_ISR*I_ _REE

RETURR AIR TEMPI COOL

II [.THALPY SENSOR _ _(.

I I BLU

IIPNK--_

II LALS I

I I FIELD SPLICE

LI BRN

RED

FIELD SPLICE

ECONOMIZER MOTOR

Potentiometer Default Settings: NOTES:

Power Exhaust Middle

Minimum Pos. Fully Closed

DCV Max. Middle

DCV Set Middle

Enthalpy C Setting

1, 620 ohm, 1 watt 5% resistor should be removed only when using differential

enthalpy or dry bulb.

2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power

supply, it cannot have the secondary of the transformer grounded.

3. For field-installed remote minimum position POT, remove black wire jumper

between P and P1 and set control minimum position POT to the minimum

position.

Fig. 36 -- EconoMi$erlV Wiring

NOTE 1

NOTE 2

50HJ540573

ACTUATOR

ASSEMBLY

DIRECT DRIVE

ACTUATOR

500 OHM

RESISTOR- "h_

OAT

PINK

BLUE

RED 2

BLACK 1

WHITE 12

ECONOMI$ER2 PLUG

LEGEND

OAT -- Outdoor Air Temperature Sensor

NOTES:

1. Switch on actuator must be in run position for economizer to operate.

2. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.

Fig. 37 -- EconoMi$er2 Wiring

ECONOMI$ERIV CONTROL MODES

IMPORTANT: The optional EconoMiSer2 does not include

a controllel: The EconoMiSer2 is opelated by a 4 to 20 mA

signal from an existing field-supplied controller (such as

PremierLink TM control). See Fig. 37 for wiling information.

Determine the EconoMiSerIV control mode before set up of

the control. Some modes of operation may lequile diffelent sen-

sol.s. Refer to Table 12. The EconoMiSerIV is supplied from file

factory with a supply air temperatme sensor, a low temperature

complessor lockout switch, and an outdoor air temperature sen-

sol: This _dlows for opelation of the EconoMiSerIV with out-

door air dly bulb changeover control. Additiomd accessories

can be added to allow for different types of changeover control

and operation of file EconoMiSerIV and unit.

Table 12 -- EconoMi$erlV Sensor Usage

APPLICATION

Outdoor Air

Dry Bulb

Differential

Dry Bulb

Single Enthalpy

Differential

Enthalpy

CO2 for DCV

Control using a

Wall-Mounted

CO2 Sensor

CO2 for DCV

Control using a

Duct-Mounted

CO2 Sensor

ECONOMI$ERIV WITH OUTDOOR AIR

DRY BULB SENSOR

Accessories Required

None. The outdoor air dry bulb sensor

is factory installed.

CRTEMPSN002A00*

HH57AC078

and

CRENTDIF004A00*

33ZCSENCO2

33ZCSENCO21- 1_

and CRCBDIOX005A001-1-

33ZCASPCO2**

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are

used on many different base units. As such, these kits may con-

tain parts that will not be needed for installation.

1-33ZCSENCO2 is an accessory CO2 sensor.

**33ZCASPCO2 is an accessory aspirator box required for duct-

mounted applications.

1-1-CRCBDIOX005A00 is an accessory that contains both

33ZCSENCO2 and 33ZCASPCO2 accessories.

EXHAUST

FAN SET POINT

LED LIGHTS

WHEN EXHAUST

CONTACT tS MADE

MINIMUM DAMPER

POSITION SETTING

MAXIMUM DAMPER

DEMAND CONTROL

VENTILATION SET POINT

LED LIGHTS WHEN

DEMAND CONTROL

VENTILATION INPUT

IS ABOVE SET POINT

DEMAND CONTROL

VENTILATION SET POINT

LED LIGHTS WHEN

OUTDOOR AIR IS

SUITABLE FOR

FREEOOO ' OL,NG,ENTHALPYJ

CHANGEOVER SET POINT

Fig. 38 -- EconoMiSerlV Controller Potentiometer

and LED Locations

18 +'%.,,, LEDON

16- -- - LED OFF

LED ON

45 50 55 60 65 70 75 80

DEGREES FAHRENHEIT

-LED OFF_h LED ON-- --

85 90 95 100

Fig. 39 -- Outside Air Temperature

Changeover Set Points

Outdoor Dry Bulb Changeover -- The smn&ud controller is

shipped from the factory configured for outdoor dry bulb

changeover control. The outdoor air and supply air temperature

sensors are included as stan&u'd. For this control mode, the

outdoor temperature is compaled to an adjustable set point

selected on the control. If file outdoor-air temperature is above

the set point, the EconoMiSerIV will adjust the outdoor-air

dampers to minimum position. If the outdoor-air temperatme is

below the set point, the position of the outdoor-air dampel.s will

be controlled to provide free cooling using outdoor air When

in this mode, file LED next to the free cooling set point potenti-

ometer will be on. The changeover temperature set point is

controlled by the free cooling set point potentiometer located

on the control. See Fig. 38. Tile scale on the potentiometer is A,

B, C, and D. See Fig. 39 for the corresponding temperature

changeover values.

Differential Dry Bulb Control -- For differential @ bulb

control the stan(lard outdoor dry bulb sensor is used in conjunc-

tion with an additional accessory return air sensor (p_u-tnumber

CRTEMPSN002A00). Tile accessory sensor must be mounted

in the return airstream. See Fig. 40.

In this mode of operation, the outdoor-air temperature is

compared to the return-air temperature and the lower tempera-

ture airstream is used for cooling. When using this mode of

changeover control, turn the free coolin_enthalpy set point

potentiometer fully clockwise to the D setting. See Fig. 38.

RETURN AIR

IAQ TEMPERATURE

SENSOR OR ENTHALPY

SENSOR

Fig. 40 -- Return Air Temperature or

Enthalpy Sensor Mounting Location

Outdoor Enthalpy Changeover -- For enthalpy control, ac-

cessoq enthalpy sensor (part number HH57AC078) is

required. Replace the stan&ud outdoor dry bulb temperature

sensor with the accessory enthalpy sensor in the same mount-

ing location. See Fig. 33. When the outdoor air enthalpy rises

above the outdoor enthalpy changeover set point, the outdoor-

air damper moves to its minimum position. The outdoor

enthalpy changeover set point is set with the outdoor enthalpy

set point potentiometer on the EconoMiSerIV controllel: The

set points are A, B, C, and D. See Fig. 41. The factory-installed

620-ohm jumper must be in place across terminals SR and SR+

on the EconoMiSerIV controllel: See Fig. 33 and 42.

Differential Enthalpy Control -- For differential enthalpy

control, the EconoMiSerIV controller uses two enthalpy sen-

sors (HH57AC078 and CRENTDIF004A00), one in the out-

side air and one in the return airstream or the EconoMiSerIV

frmne. The EconoMiSerIV controller compares the outdoor air

enthalpy to the return air enthalpy to determine EconoMiSerIV

use. The controller selects the lower enthalpy air (return or out-

door) for cooling. For example, when the outdoor air has a low-

er enthalpy than the return air and is below the set point, the

EconoMiSerlV opens to bring in outdoor air for free cooling.

Replace the standard outside air @ bulb temperature sen-

sor with the accessory enth_lpy sensor in the same mounting

location. See Fig. 33. Mount the return air enthalpy sensor in

the return airstream. See Fig. 40. The outdoor enthalpy

changeover set point is set with the outdoor enthalpy set point

potentiometer on the EconoMiSerlV controllel: When using

this mode of changeover control, turn the enth_dpy set point

potentiometer lillly clockwise to the D setting.

NOTE: Remove 620-ohm resistor if differential enthalpy sen-

sor is installed.

Indoor Air Quality (IAQ) Sensor Input -- The IAQ input

can be used for demand control ventilation control based on the

level of CO2 measured in the space or return air duct.

Mount the accessory IAQ sensor according to manufacturer

specifications. The IAQ sensor should be wired to the AQ and

AQI terminals of the controllel: Adjust the DCV potentiome-

ters to correspond to the DCV voltage output of the indoor air

quality sensor at the user-determined set point. See Fig. 43.

If a sep_uate field-supplied transformer is used to power the

IAQ sensor, the sensor must not be grounded or the

EconoMiSerIV control bomd will be damaged.

Exhaust Set Point Adjustment -- The exhaust set point will

determine when the exhaust fan runs based on dmnper position

(if accessory power exhaust is installed). The set point is modi-

fied with the Exhaust Fan Set Point (EXH SET) potentiometel:

See Fig. 36. The set point represents the &_mper position above

which the exhaust fan will be turned on. When there is a

call for exhaust, the EconoMiSerlV controller provides a

45 _+15 second delay before exhaust fan actiw_tion to allow the

dmnpers to open. This delay allows the damper to reach the

appropriate position to avoid unnecessary fan overload.

Minimum Position Control -- There is a minimum damper

position potentiometer on the EconoMiSerIV controllel: See

Fig. 36. The minimum &_mper position maintains the mini-

mum airflow into the building during the occupied period.

When using demand ventilation, the minimum dmnper po-

sition represents the minimum ventilation position for VOC

(volatile organic compound) ventilation requirements. The

maximum demand ventilation position is used for fully occu-

pied ventilation.

When demand ventilation control is not being used, the

minimum position potentiometer should be used to set the oc-

cupied ventilation position. The maximum demand ventilation

position should be turned fully clockwise.

Adjust the minimum position potentiometer to allow the

minimum mnount of outdoor all: as required by local codes, to

enter the building. Make minimum position adjustments with

at least 10° F temperature difference between the outdoor and

return-air temperatures.

To determine the minimum position setting, perform the

following procedure:

1. Calculate the appropriate mixed-air temperature using the

following formula:

OA RA

(To x l-]--ff_-) + (TR x _ ) = TM

To = Outdoor-Air Temperature

OA = Percent of Outdoor Air

TR = Return-Air Temperature

RA = Percent of Return Air

TM = Mixed-Air Temperature

As an example, if local codes require 10% outdoor air

during occupied conditions, outdoor-air temperature is

60 IF.and return-air temperature is 75 F.

(60 x. 10) + (75 x .90) = 73.5 F

2. Disconnect the supply-air sensor from terminals T and

TI.

3. Ensure that the factory-installed jumper is in place across

terminals P and PI. If lemote &_mper positioning is being

used, make sure that the termimfls are wired according to

Fig. 36 and that the minimum position potentiometer is

turned fully clockwise.

4. Connect 24 vac across termin_ds TR and TRI.

5. Cmefully adjust the minimum position potentiometer

until the measured mixed-air temperature matches the

c_dculated v_due.

6. Reconnect the supply-air sensor to terminals T and TI.

Remote control of the EconoMiSerIV dalnper is desirable

when requiring additional temporary ventilation. If a

field-supplied remote potentiometer (Honeywell part number

$963B1128) is wired to the EconoMiSerIV controller, the min-

imum position of the &lmper can be controlled from a remote

location.

To control the minimum damper position remotely, remove

the factory-installed jumper on the P and PI terminals on the

EconoMiSerIV controllel: Wire the field-supplied potentiome-

ter to the P and PI terminals on the EconoMiSerlV controller

See Fig. 40.

Damper Movement -- Damper movement from full open to

full closed (or vice versa) takes 21/2 minutes.

Thermostats -- The EconoMiSerIV control works with con-

ventional thermostats that have a YI (cool stage 1), Y2 (cool

stage 2), WI (heat stage 1), W2 (heat stage 2), and G (fan). The

EconoMiSer[V control does not support space temperature

sensors. Connections are made at the thermostat termimd con-

nection board located in the main control box.

Occupancy Control -- The factory default configuration for

the EconoMiSerlV control is occupied mode. Occupied status

is provided by the black jumper from termimfl TB2-9 to temli-

nal TB2-10. When unoccupied mode is desired, inst_ll a field-

supplied timeclock function in place of the jumper between

terminals TB2-9 and TB2-10. See Fig. 36. When the timeclock

contacts are closed, the EconoMiSerIV control will be in occu-

pied mode. When the timeclock contacts me open (removing

the 24-v signal from terminal N), the EconoMiSerIV will be in

unoccupied mode.

Demand Controlled Ventilation (DCV) -- When using the

EconoMiSerIV for demand controlled ventilation, there are

some equipment selection criteria which should be considered.

When selecting the heat capacity and cool capacity of the

equipment, the maximum ventilation rote must be ev_duated for

design conditions. The maximum damper position must be cal-

culated to provide the desired fresh ail:

Typicallythe maximum ventilation rate will be about 5 to

10% more than the typical cfin required per person, using

nonmd outside air design criteria.

A proportional anticipato Ustrategy should be token with

the following conditions: a zone with a large area, varied occu-

pancy, and equipment that cannot exceed the requiled ventila-

tion rate at design conditions. Exceeding the required ventila-

tion rate means the equipment can condition air at a maximum

ventilation rate that is greater than the required ventilation rate

for maximum occupancy. A proportional-anticipatory strategy

will cause the fresh air supplied to increase as the room CO2

level increases even though the CO2 set point has not been

reached. By the time the CO2 level reaches the set point, the

&_mper will be at maximum ventilation and should maintain

the set point.

85 90 95 100 105 110

(29) (32) (35) (38) (41) (43)

CONTROL CONTROL POINT ,_'_ /Ix. /1 \

CURVE APPROX. °F (°C)

AT 50% RH _q"

A 73 123)

B 70/21)

C 67/19)

D 63 (17)

35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110

(2) (4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)

APPROXIMATE DRY BULB TEMPERATURE-- °F (°C)

Fig. 41 -- Enthalpy Changeover Set Points

CURVE

TRI'_-I TRll _'--

FB EF1

Fig. 42- EconoMi$erlV Controller

,'7

6000

5000

4000

3000

2000

1000

CO2 SENSOR MAX RANGE SETTING

+800 ppm

+goo ppm

+1000 ppm

+1100 ppm

2345678

DAMPER VOLTAGE FOR MAX VENTILATION RATE

Fig. 43 -- 002 Sensor Maximum Range Setting

In order to have the CO2 sensor control the economizer

dmnper in this manner, first detennine file damper voltage out-

put for minimum or base ventilation. Base ventilation is the

ventilation required to remove contaminants during unoccu-

pied periods. The following equation may be used to determine

the percent of outside<fir entering the building for a given

damper position. For best results there should be tit least a

10 degree difference in outside and return-air temperatures.

OA RA

(To x l---ff_)+ (TR x _ )= TM

To = Outdoor-Air Temperature

OA = Percent of Outdoor Air

TR = Return-Air Temperature

RA = Percent of Return Air

TM = Mixed-Air Temperature

Once base ventilation has been detemfined, set the mini-

mum dmnper position potentiometer to the correct position.

The stone equation can be used to determine the occupied or

maximum ventilation rate to the building. For example, tin out-

put of 3.6 volts to the actuator provides a base ventilation rate

of 5% and an output of 6.7 volts provides the maximum venti-

lation rate of 20% (or base plus 15 cfln per person). Use Fig. 43

to determine the maximum setting of the CO2 sensor For ex-

ample, a 1100 ppm set point relates to a 15 cfm per person de-

sign. Use the 1100 ppm curve on Fig. 43 to find the point when

the CO2 sensor output will be 6.7 volts. Line up the point on the

graph with the left side of the chart to determine that the range

configuration for the CO2 sensor should be 1800 ppm. The

EconoMiSerIV controller will output the 6.7 volts from the

CO2 sensor to the actuator when the CO2 concentration in the

space is tit 1100 ppm. The DCV set point may be left tit 2 volts

since the CO2 sensor voltage will be ignored by the

EconoMiSerlV controller until it rises above the 3.6 volt setting

of the minimum position potentiometel:

Once the fiJlly occupied &_mper position has been deter-

mined, set the maximum dmnper demand control ventilation

potentiometer to this position. Do not set to the maximum posi-

tion as this can result in over-ventilation to the space and poten-

tial high-humidity levels.

CO__ Sensor Configuration --The CO2 sensor has preset

standard voltage settings that can be selected anytime after the

sensor is powered up. See Table 13.

Use setting 1 or 2 for Carrier equipment. See Table 13.

1. Press Clear and Mode buttons. Hold at least 5 seconds

until the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appem:

3. Use the Up/Down button to select the preset numbel: See

Table 13.

4. Press Enter to lock in the selection.

5. Press Mode to exit and resume norm_d operation.

The custom settings of the CO2 sensor can be changed any-

time after the sensor is energized. Follow the steps below to

change the non-stan&rd settings:

1. Press Clear and Mode buttons. Hold at least 5 seconds

until the sensor enters the Edit mode.

2. Press Mode twice. The STDSET Menu will appem:

3. Use the Up/Down button to toggle to the NONSTD menu

and press Entel:

4. Use the Up/Down button to toggle through each of the

nine variables, starting with Altitude, until the desired set-

ting is reached.

5. Press Mode to move through the variables.

6. Press Enter to lock in the selection, then press Mode to

continue to the next vmiable.

Dehumidification of Fresh Air with DCV Control -- Infor-

mation from ASHRAE indicates that the largest humidity load

on any zone is the fresh air introduced. For some applications,

a field-installed energy recovery unit can be added to reduce

the moisture content of the fresh tfir being brought into the

building when the enthalpy is high. In most cases, the normal

heating and cooling processes are more than adequate to re-

move the humidity loads for most commercial applications.

If normal rooftop heating and cooling operation is not ade-

quate for the outdoor humidity level, an energy recovery unit

and/or a dehumidification option should be considered.

Table 13 -- 002 Sensor Standard Settings

ANALOG

EQUIPMENT OUTPUT

SETTING

Interface with Standard

Building Control System

Economizer

Health & Safety

Parking/Air Intakes/

9 Loading Docks

OUTPUT

Proportional

Exponential

Proportional

Exponential

Proportional

VENTILATION

RATE

(cfm/Pereon)

Any

0-10V

4-20 mA

2-10V

7-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-10V

4-20 mA

0-t0V

4-20 mA

CO2

CONTROLRANGE

(ppm)

0-2000

0-1100

0- 900

0-1100

0- 900

0-9999

0-2000

OPTIONAL

RELAY SETPOINT

(ppm)

1000

1100

900

1100

900

5000

700

LEGEND

ppm -- Parts Per Million

RELAY

HYSTERESIS

(ppm)

5O0

Step 14 -- Install Humidistat for Optional

MoistureMi$er TM Package -- MoistureMi$er dehu-

midification package operation can be controlled by field

installation of a Cmder-approved humidistat. To inst_dl file

humidistat perfoml the following procedme:

1. Locate humidistat on a solid interior wall in the condi-

tioned space. Location should be a well ventilated area

to sense average humidity.

2. Route thermostat cable or equiv;dent single leads of col-

ored wile fi_)mHumidistat terminals through conduit in

unit to the low voltage connection on the 2-pole terminal

strip (TB3) as shown in Fig. 44 and Fig. 45. See Fig. 46

for operational diagram. .E DDOH, 0L,, ,N0 -- /

FACTORY iNSTALLED JUMPER

(£EMOV_ I_ HUMID)STAr iS USED)

Fig. 45 -- Typical MoistureMiSer Dehumidification

Package Control Box

MOISTUREMI$ER

_----_YEL

BLK

BLK_,

TRANI_L_

GRN-YEL

LEGEND

CB -- Circuit Breaker

LLSV -- Liquid Line Solenoid Valve

LPS -- Low-Pressure Switch

TB -- Terminal Block

TRAN -- Transformer

YEL

TO CRANKCASE

/ HEATER CIRCUITS

_"__YEL "BLK

BLK

S-LPS1

CB4 TB3

3.2 AMPS S LPS2

FACTOR

(OR HUMIDISTAT IF USED)

LLSV1

•• LLSV2_ BLK-

Fig. 44 -- Typical MoistureMi$er Dehumidification Package

Humidistat Wiring Schematic (460 V Unit Shown)

CONDENSER COIL _

SUCTION

l DISCHARGE

OUTDOORAIR

_CCHCRANKCASE LIQUID

HEATER _ EVAPORATOR

COIL

\\---COMPRESSOR

SUBCOOLER - 1

COIL

EQUALIZER

LINE

3-WAY

VALVE

S-LPS _

SUB COOLER CONTROL

LOW PRESSURE SWITCH

BULB

TXV

TXV -- Thermostatic Expansion Valve

Fig. 46 -- MoistureMi$er TM Dehumidification Operation Diagram

START-UP

Use the following information and Start-Up Checklist on

page CL-I to check out unit PRIOR to start-up.

Unit Preparation -- Check that unit has been installed in

accordance with these installation instructions and all applica-

ble codes.

COMPRESSOR MOUNTING -- Complessol_ are internal-

ly spring mounted. Do not loosen or remove compressor

holddown bolts.

REFRIGERANT SERVICE PORTS -- Each refrigerant sys-

tem has a total of 3 Schrader-type service gage ports. One port

is located on the suction line, one on the compressor discharge

line, and one on the liquid line. In addition Schmder-type

valves are located underneath file low-pressme switches. Be

sure that caps on the ports are tight.

COMPRESSOR ROTATION --It is important to be certain

the compressors me rotating in the proper direction. To deter-

mine whether or not compressors are rotating in the proper

direction:

1. Connect service gages to suction and discharge

pressure fittings.

2. Energize the compressoc

3. The suction pressure should &op and the discharge

pressure should rise, as is normal on any start-up.

If the suction plessure does not chop and the discharge

pressure does not rise to normal levels:

1. Note that the evaporator fan is probably also rotating

in the wrong direction.

2. Turn off power to the unit.

3. Reverse any two of the incoming power leads.

4. Turn on power to the compressoc

The suction and discharge pressure levels should now move

to their normal start-up levels.

NOTE: When compressors are rotating in the wrong direction,

the unit will have incleased noise levels and will not provide

heating and cooling.

After a few minutes of reverse operation, the scroll

compressor internal overload protection will open, which will

activate the unit's lockout and requires a manual reset. Reset is

accomplished by turning the thermostat on and off.

INTERNAL WIRING- Check all electrical connections in

unit control boxes; tighten as required.

GAS PIPING -- Check gas piping for leaks.

CRANKCASE HEATER -- Crankcase heater(s) is energized

as long as there is power to the unit and the compressor is not

operating.

IMPORTANT: Unit power must be on for 24 hours prior ]

to stmt-up. Otherwise, dmnage to the compressor may I

result.

EVAPORATOR FAN- Fan belt and wu'iable pulleys am

factory-installed. See Tables 14-21 for fan performance data.

Be sure that fans rotate in the proper direction. See Table 22 for

air quantity limits. See Table 23 for static pressure information

for accessories and options. See Table 24 for fan rpm at various

motor pulley settings. See Tables 25 and 26 for evaporator fan

motor &tta. To alter fan performance, see Evaporator Fan

Performance Adjustment section on page 44.

NOTE: A 31/2-in. bolt and threaded plate are included in the

installer's packet. They can be added to the motor support

channel below the motor mounting plate to aid in raising the

tim motoc

CONDENSER-FANS AND MOTORS-- Condenser fans

and motors m'e factory set. Refer to Condenser-Fan Adjustment

section on page 45 as required. Be sure that fans rotate in the

proper dilection.

RETURN-AIR FILTERS--Check that correct filters me

installed in filter tracks (see Table 1). Do not operate unit

without return-air filtel_.

OUTDOOR-AIR INLET SCREENS -- Outdoor-air inlet

screens must be in place before operating unit.

GAS HEAT -- Verify gas pressures before turning on heat as

follows:

1. Turn off manual gas stop.

2. Connect pressure gage to supply gas pressure tap (see

Fig. 14).

3. Connect pressure gage to manifold pressme tap on gas

valve.

4. Turn on manual gas stop and set thermostat to HEAT

position. After the unit has run for several minutes, verily

flint incoming pressure is 5.5 in. wg or greater, and that

file manifold pressure is 3.3 in. wg. If manifold plessme

must be adjusted, refer to Gas Valve Adjustment section

on page 46.

5. After unit has been in operation for 5 minutes, check

temperature rise across the heat exchangers. See unit

informative plate for correct rise limits of file heat

supplied. Air quantities may need to be adjusted to bring

the actual rise to within the allowable limits.

Disconnect gas piping from unit when leak

testing at pressure greater than 1/2 psig. Pres-

sures greater than 1/2 psig will cause gas

valve damage resulting in hazardous condi-

tion. If gas valve is subjected to pressme

gleater than I/2 psig, it must be replaced

before use. When pressure testing field-

supplied gas piping at pressures of 1/2 psig

or less, a unit connected to such piping must

be isolated by manually closing the gas

v_dve.

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

Table 14 -- Fan Performance -- 48TMD016 (Low Heat Units)*

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

0.2 0.4 0.6 0.8 1.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 1307 1.53 761 1330 1.56 840 1572 1.84 912 1822 2.14 980 2080 2.44

747 1384 1.62 790 1515 1.78 866 1765 2.07 936 2023 2.37 1002 2289 2.68

741 1465 1.72 820 1718 2.01 893 1977 2.32 961 2243 2.63 1025 2516 2.95

810 1911 2.24 882 2182 2.56 950 2459 2.88 1014 2741 3.21 1075 3029 3.55

844 2164 2.54 914 2444 2.87 980 2730 3.20 1042 3021 3.54 1100 3317 3.89

879 2439 2.86 947 2729 3.20 1010 3023 3.55 1070 3322 3.90 1127 3626 4.25

915 2737 3.21 980 3035 3.56 1041 3338 3.91 1099 3645 4.28 1155 3957 4.64

950 3057 3.59 1013 3364 3.95 1072 3675 4.31 1129 3991 4.68 1183 4311 5.06

986 3401 3.99 1047 3717 4.36 1104 4037 4.74 1159 4361 5.11 1211 4689 5.50

1022 3770 4.42 1081 4095 4.80 1136 4423 5.19 1189 4755 5.58 1241 5091 5.97

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

AVAILABLEEXTERNAL STATICPRESSURE (in, wg)

1.2 1.4 1.6 1.8 2.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1044 2345 2.75 1105 2619 3.07 1163 2899 3.40 1218 3187 3.74 1271 3481 4.08

1065 2561 3.00 1124 2841 3.33 1180 3127 3.67 1235 3420 4.01 1287 3720 4.36

1086 2795 3.28 1144 3082 3.61 1199 3375 3.96 1252 3674 4.31 1304 3979 4.67

1132 3324 3.90 1187 3624 4.25 1240 3929 4.61 1291 4241 4.97 1341 4558 5.35

1157 3619 4.24 1210 3925 4.60 1262 4239 4.97 1312 4557 5.34 1361 4880 5.72

1182 3935 4.62 1234 4249 4.98 1285 4569 5.36 1334 4894 5.74 -- -- --

1208 4274 5.01 1259 4595 5.39 1309 4922 5.77 ......

1235 4636 5.44 1285 4964 5.82 .........

1262 5021 5.89 ............

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 873 to 1021 rpm. Alter-

nate high-static drive range is 1025 to 1200. Other rpms require a

field-supplied drive.

AVAILABLE EXTERNAL STATIC PRESSURE (in, wg)

2.2 2.4 2.6 2.8 3.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1322 3781 4.43 1372 4088 4.79 1419 4400 5.16 1466 4719 5.53 1511 5042 5.91

1337 4025 4.72 1386 4337 5.09 1433 4655 5.46 1479 4978 5.84 -- -- --

1353 4290 5.03 1401 4607 5.40 1448 4930 5.78 ......

1388 4881 5.72 ............

Refer to page 39 for general Fan Performance Data notes.

NOTE: Maximum continuous bhp for the standard motor is 6.13. The

maximum continuous watts is 5180, Do not adjust motor rpm such

that motor maximum bhp and/or watts is exceeded at the maximum

operating cfm. See Table 25 for more information.

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

Table 15 -- Fan Performance -- 48TMF016 (High Heat Units)*

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

0.2 0.4 0.6 0.8 1.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

753 1307 1.53 786 1404 1.65 861 1644 1.93 932 1893 2.22 997 2150 2.52

747 1384 1.62 818 1603 1.88 890 1852 2.17 958 2108 2.47 1022 2373 2.78

775 1571 1.84 850 1822 2,14 920 2079 2,44 986 2344 2,75 1048 2616 3,07

849 2054 2.41 918 2323 2.73 982 2598 3.05 1044 2879 3.38 1102 3166 3.71

886 2329 2.73 952 2607 3.06 1015 2891 3.39 1074 3180 3.73 1130 3474 4.08

924 2628 3.08 987 2915 3,42 1047 3207 3.76 1105 3504 4,11 1160 3807 4,46

962 2951 3.46 1023 3246 3.81 1081 3547 4.16 1136 3853 4.52 1190 4163 4.88

1000 3298 3.87 1059 3603 4.23 1115 3912 4.59 1168 4225 4.96 1220 4543 5.33

1038 3672 4.31 1095 3986 4.67 1149 4303 8.05 1201 4625 5.42 1251 4950 5.81

1077 4072 4.78 1131 4394 5.15 1184 4720 5.54 1234 5050 5.92 -- -- --

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

AVAILABLEEXTERNAL STATICPRESSURE (in. wg)

1.2 1.4 1.6 1.8 2.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1060 2414 2.83 1119 2685 3.15 1175 2964 3.48 1230 3250 3.81 1282 3542 4.15

1082 2644 3.10 1140 2922 3,43 1195 3207 3,76 1248 3498 4,10 1299 3795 4,45

1106 2894 3.39 1163 3178 3,73 1216 3470 4,07 1268 3767 4,42 1319 4071 4,77

1157 3459 4.06 1211 3757 4,41 1262 4061 4.76 1312 4371 5,13 1360 4686 5,50

1184 3774 4.43 1236 4080 4.79 1287 4391 5,15 1335 4707 5,52 1382 5029 5.90

1212 4114 4.83 1263 4427 5.19 1312 4745 5.57 1359 5067 5.94 -- -- --

1241 4478 5.25 1290 4798 5.63 1338 5122 6.01 ......

1270 4866 5.71 ............

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 873 to 1021 rpm. Alter-

nate high-static drive range is 1025 to 1200. Other rpms require a

field-supplied drive.

AVAILABLEEXTERNAL STATICPRESSURE (in. wg)

2.2 2.4 2.6 2.8 3.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1332 3841 4.50 1381 4145 4.86 1428 4456 5.23 1473 4772 5.60 1518 5095 5.98

1349 4100 4.81 1397 4409 5,17 1443 4725 5,54 1488 5046 5.92 -- -- --

1367 4380 5.14 1414 4695 5.51 1460 5016 5.88 ......

1407 5007 5.87 ............

Refer to page 39 for general Fan Performance Data notes.

NOTE: Maximum continuous bhp for the standard motor is 6.13. The

maximum continuous watts is 5180. Do not adjust motor rpm such

that motor maximum bhp and/or watts is exceeded at the maximum

operating cfm. See Table 25 for more information.

AIRFLOW

(cfm)

Table 16 -- Fan Performance -- 48TMD020 (Low Heat Units)*

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

0,2 0.4 0.6 0.8 1,0 1.2

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

5_500 758 2.27 1908 831 2.58 2171 901 2.91 2443 968 3.24 2723 1031 3,58 3009 1091 3.93 3302

6,000 810 2.72 2287 881 3.04 2556 947 3.37 2833 1010 3.71 3116 1070 4.05 3406 1127 4.40 3702

6,500 866 3.22 2710 932 3.55 2985 994 3.88 3266 1054 4.23 3554 1111 4.57 3847 1166 4.93 4146

7,000 923 3.78 3177 985 4.11 3458 1044 4.45 3744 1100 4.80 4036 1155 5.15 4333 1207 5.51 4635

7,500 980 4.39 3690 1038 4.73 3976 1094 5.07 4267 1148 5.43 4564 1200 5.78 4864 1250 6.15 5170

8,000 1038 5.06 4251 1093 5.40 4542 1146 5.75 4838 1197 6.11 5138 1246 6.47 5443 1294 6.84 5752

8,500 1096 5.78 4859 1148 6.13 5156 1198 6.49 5456 1247 6.85 5761 1294 7.22 6070 1340 7.59 6382

9,000 1154 6.56 5517 1204 6.92 5818 1251 7.28 6123 1298 7.65 6432 1343 8.02 6745 1388 8.40 7062

9,500 1213 7.40 6224 1260 7.77 6531 1306 8.13 6840 1350 8.51 7154 1394 8.88 7471 1436 9.26 7791

10,000 1272 8.30 6983 1317 8.67 7294 1360 9.05 7608 1403 9.43 7926 1445 9.81 8247 1486 10.19 8570

AIRFLOW

(cfm)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.4 1.6 1.8 1.9 2.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Bpm Bhp Watts Rpm Bhp Watts

5,500 1149 4.28 3602 1204 4.68 3907 1258 5.02 4217 1284 5.20 4375 1309 8.39 4533

6,000 1183 4.76 4003 1236 5.13 4310 1288 5.50 4622 1313 5.68 4780 1337 5.87 4939

6,500 1219 5.29 4450 1270 5.66 4759 1320 6.03 5073 1344 6.22 5232 1368 6.41 5391

7,000 1258 5.88 4942 1307 6.25 5253 1355 6.62 5569 1378 6.81 5729 1402 7.00 5890

7,500 1299 6.52 5480 1346 6.89 5794 1392 7.27 6113 1415 7.46 6273 1437 7.65 6435

8,000 1341 7.21 6065 1387 7.59 6383 1392 7.97 6704 1453 8.16 6866 1475 8.36 7028

8,500 1385 7.97 6699 1429 8.35 7019 1472 8.73 7343 1493 8.93 7506 1514 9.12 7670

9,000 1431 8.78 7382 1473 9.15 7705 1515 9.55 8032 1535 9.75 8196 -- -- --

9,500 1478 9.65 8114 1519 10.04 8441 .......

10,000 .............

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 910 to 1095 rpm. Alternate high-

static drive range is 1069 to 1287. Other rpms require a field-supplied drive.

Refer to page 39 for general Fan Performance Data notes.

NOTE: Maximum continuous bhp is 8.90. The maximum continuous watts is

8180. Do not adjust motor rpm such that motor maximum bhp and/or watts is

exceeded at the maximum operating cfrn. See Table 28 for more information.

Table 17 -- Fan Performance -- 48TMF020 (High Heat Units)*

AIRFLOW AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

(cfm) 0.2 0,4 0.6 0.8 1.0 1,2

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Bpm Bhp Watts

5,500 798 2.43 2043 866 2.74 2306 934 3.07 2578 998 3.40 2856 1059 3.74 3142 1117 4.08 3434

6,000 854 2.92 2452 921 3.24 2722 984 3.57 3998 1044 3.90 3281 1102 4.25 3570 1158 4.60 3865

6,500 914 3.46 2909 977 3.79 3184 1036 4.12 3465 1093 4.46 3752 1148 4.81 4045 1201 5.16 4343

7,000 975 4.06 3414 1034 4.39 3695 1090 4.73 3981 1144 5.08 4272 1196 5.43 4569 1246 5.79 4870

7,500 1037 4.72 3969 1092 5.06 4255 1148 5.41 4546 1196 5.76 4842 1256 6.12 5142 1294 6.48 5447

8,000 1099 5.44 4575 1150 5.79 4866 1201 6.14 5162 1249 6.50 5462 1297 6.86 5766 1343 7.22 6075

8_500 1161 6.22 5232 1210 6.57 5529 1258 6.93 5829 1304 7.29 6134 1349 7.66 6443 1393 8.03 6755

9,000 1223 7.07 5943 1270 7.43 6245 1315 7.79 6550 1360 8.16 6869 1403 8.53 7171 1445 8.90 7487

9,500 1286 7.98 6708 1331 8.34 7014 1374 8.71 7324 1416 9.08 7638 1457 9.46 7954 1498 9.84 8274

10,000 1349 8.95 7528 1392 9.32 7839 1433 9.70 8154 1473 10.07 8471 ....

AIRFLOW

(cfm)

AVAILABLE EXTERNAL STATIC PRESSURE (in, wg)

1,4 1.6 1,8 1.9 2.0

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

5,500 1173 4.44 3732 1227 4.80 4038 1279 5.17 4345 1304 5.35 4502 1329 5.54 4829

6,000 1211 4.95 4165 1263 5.32 4471 1313 5.89 4782 1337 5.87 4939 1361 8.08 5097

6,500 1252 5.53 4848 1302 5.89 4954 1350 8.28 5267 1373 8.58 5425 1398 8.84 5584

7,000 1295 8.18 5178 1343 8.52 5487 1389 8.90 5802 1412 7.09 5961 1434 7.28 8121

7,500 1340 8.85 5756 1386 7.22 8070 1431 7.60 8387 1452 7.79 6547 1474 7.98 6709

8,000 1388 7.80 8388 1431 7.97 8704 1474 8.35 7024 1495 8.54 7188 1518 8.74 7348

8,500 1436 8.41 7071 1478 8,79 7390 1520 9.17 7713 1540 9.37 7876 -- -- --

9,000 1486 9.28 7807 1527 9.67 8130 .........

9,500 1538 10.22 8597 ............

10,000 ...............

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 910 to 1095 rpm. Alternate high-

static drive range is 1069 to 1287. Other rpms require a field-supplied drive.

Refer to page 39 for general Fan Performance Data notes.

NOTE: Maximum continuous bhp is 5.90. The maximum continuous watts is

5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is

exceeded at the maximum operating cfm. See Table 25 for more information.

AIRFLOW

(cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

Table 18- Fan Performance- 48TMD025 (Low Heat Units)*

AVAILABLE EXTERNAL STATIC PRESSURE(in. wg)

0.2 0.4 0.6 0.8 1.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

824 2607 3.09 894 2844 3.37 961 3085 3.66 1023 3330 3.95 1083 3578 4.24

881 3030 3.59 947 3266 3.88 1009 3507 4.16 1069 3751 4.45 1126 3998 4.74

939 3488 4.14 1001 3725 4,42 1060 3965 4,70 1116 4208 4,99 1170 4454 5,28

998 3982 4.72 1055 4218 5.00 1111 4458 5.29 1166 4701 5.58 1217 4946 5.87

1056 4512 5.36 1111 4748 5.63 1164 4988 5.92 1215 5230 6.20 1264 5474 6.49

1116 5077 6.02 1167 5314 6.30 1218 5553 6.59 1266 5795 6.87 1314 6039 7.16

1175 5678 6.74 1224 5915 7.02 1272 6154 7.30 1319 6396 7.59 1364 6639 7.88

1235 6315 7.49 1282 6552 7.77 1327 6791 8.06 1372 7033 8.34 1415 7276 8.63

1295 6988 8.29 1340 7225 8.57 1383 7465 8.86 1426 7706 9.14 1468 7949 9.43

AIRFLOW

(cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

AVAILABLE EXTERNAL STATIC PRESSURE (in, wg)

1.2 1.4 1.6 1.8 2.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1141 3829 4.54 1196 4082 4.84 1249 4337 5.15 1301 4596 5.45 1351 4856 5.76

1181 4247 5.04 1234 4499 5.34 1285 4753 5.64 1334 5009 5.94 1383 5267 6.25

1223 4702 5.58 1274 4953 5.88 1323 5205 6.18 1371 5460 6.48 1417 5716 6.78

1267 5194 6.16 1316 5443 6.46 1363 5694 6.76 1409 5947 7.06 1454 6202 7.36

1313 5721 6.79 1359 5970 7.08 1405 6220 7.38 1449 6472 7.68 1493 6726 7.98

1360 6285 7.46 1405 6533 7.75 1449 6783 8.05 1491 7034 8.34 1533 7286 8.64

1408 6885 8.17 1451 7132 8.46 1494 7381 8.76 1535 7631 9.05 -- -- --

1458 7521 8.92 1499 7768 9,22 1540 8016 9.51 ......

1508 8193 9.72 1549 8440 10.01 .........

AIRFLOW

(cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.2 2.4 2.6 2.8 3.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1399 5118 6.07 1446 5381 6.38 1492 5647 6.70 1537 5914 7.02 -- -- --

1429 5527 6.56 1475 5789 6.87 1520 6052 7.18 ......

1462 5974 7.09 1507 6234 7.40 1550 6495 7.71 ......

1498 6459 7.66 1540 6717 7.97 .........

1535 6981 8.28 ............

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 1002 to 1151 rpm, Alter-

nate high-static drive range is 1193 to 1369. Other rpms require a

field-supplied drive.

Refer to page 39 for general Fan Performance Data notes.

NOTE: Maximum continuous bhp for the standard motor is 8.7 (for

208/230 and 575-v units) and 9.5 (for 460-v units). The maximum

continuous watts is 7915 (for 208/230 and 575-v units) and 8640 (for

460-v units). Do not adjust motor rpm such that motor maximum bhp

and/or watts is exceeded at the maximum operating cfm. See

Table 26 for additional information.

AIRFLOW

(cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

Table 19 -- Fan Performance -- 48TMF025 (High Heat Units)*

AVAILABLE EXTERNAL STATIC PRESSURE(in. wg)

0.2 0.4 0.6 0.8 1.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

868 2752 3.26 934 2987 3.54 997 3227 3.83 1058 3470 4.12 1115 3716 4.41

929 3201 3.80 991 3436 4.08 1051 3675 4.36 1108 3917 4.65 1162 4163 4.94

991 3687 4.37 1049 3923 4.65 1105 4161 4.94 1159 4403 5.22 1211 4647 5.51

1054 4211 5,00 1109 4447 5.28 1161 4686 5.56 1213 4926 5,84 1262 5170 6,13

1117 4773 5.66 1168 5009 5.94 1218 5247 6.22 1267 5488 6.51 1314 5731 6.80

1180 5373 6.37 1229 5609 6.65 1277 5847 6.94 1323 6088 7.22 1368 6331 7.51

1244 6011 7.13 1290 6247 7.41 1335 6485 7.69 1380 6726 7.98 1423 6968 8.27

1308 6687 7.93 1352 6924 8.21 1395 7162 8.50 1437 7402 8.78 1479 7644 9.07

1372 7401 8.78 1414 7638 9.06 1455 7876 9.34 1496 8117 9.63 1535 8358 9.92

AIRFLOW

(cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8 2.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1171 3965 4.70 1224 4216 5.00 1276 4469 5.30 1326 4726 5.61 1374 4983 5.91

1215 4410 5.23 1266 4659 5.53 1316 4911 5.83 1364 5165 6.13 1411 5421 6.43

1262 4894 5.81 1311 5142 6.10 1358 5392 6.40 1404 5645 6.70 1449 5899 7.00

1310 5415 6,42 1357 5663 6.72 1403 5912 7.01 1447 6164 7,31 1490 6416 7,61

1360 5976 7.09 1405 6222 7.38 1449 6471 7.68 1492 6721 7.97 1533 6973 8.27

1412 6575 7,80 1455 6821 8.09 1497 7068 8.39 1538 7318 8.68 -- -- --

1465 7212 8.56 1506 7457 8.85 1547 7705 9.14 ......

1519 7888 9.36 ............

AIRFLOW

(cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.2 2.4 2.6 2.8 3.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1422 5243 6.22 1468 5505 6.53 1513 5768 6.84 ......

1456 5679 6.74 1501 5938 7.04 1544 6199 7.35 ......

1493 6155 7.30 1536 6412 7.61 .........

1533 6670 7.91 ............

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 1002 to 1151 rpm. Alter-

nate high-static drive range is 1193 to 1369. Other rpms require a

field-supplied drive.

Refer to page 39 for general Fan Performance Data notes.

NOTE: Maximum continuous bhp for the standard motor is 8.7 (for

208/230 and 575-v units) and 9.5 (for 460-v units). The maximum

continuous watts is 7915 (for 208/230 and 575-v units) and 8640 (for

460-v units). Do not adjust motor rpm such that motor maximum bhp

and/or watts is exceeded at the maximum operating cfm. See

Table 25 for more information.

Table 20 -- Fan Performance -- 48TMD028 (Low Heat Units)*

AIRFLOW

(cfm)

7,000

7,500

8,000

8,500

9,000

9,500

10,000

10,500

11,000

11,250

0,2 0,4

Rpm Bhp Watts Rpm Bhp

941 3.35 2,769 1002 3.80

999 4.05 3,348 1057 4.53

1058 4.85 4,007 1113 5.35

1117 5.74 4,750 1169 6.28

1177 6.75 5,583 1226 7.31

1237 7.98 6,511 1284 8.46

1297 9.12 7,450 1342 9.74

1358 10.49 8,674 1400 11.14

1418 12.00 9,919 1459 12.67 10,478

1449 12.80 10,585 -- -- --

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

0.6 0,8 1,0 1.2

Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

3,140 1061 4.27 3528 1117 4.76 3,934 1171 5.27 4,356 1224 5.80 4,794

3,742 1112 5.02 4152 1166 5.54 4,579 1218 6.07 5,020 1268 6.63 5,478

4,424 1165 5.87 4856 1216 6.41 5,304 1266 6.97 5,766 1314 7.55 6,243

5,190 1219 6.83 5645 1268 7.40 6,114 1315 7.98 6,597 1361 8.58 7,094

6,047 1274 7.89 6524 1320 8.48 7,015 1365 9.09 7,520 1410 9.72 8,037

6,999 1329 9.07 7499 1374 9.69 8,012 1417 10.33 8,538 1459 10.98 9,076

8,051 1385 10.37 8574 1428 11.02 9,110 1469 11.68 9,657 1510 12.36 10,217

9,209 1442 11.80 9755 1483 12.47 10,314 1523 13.16 10,883

AIRFLOW

(cfm)

7,000

7,500

8,000

8,500

9,000

9,500

10,000

10,500

11,000

11,250

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

1.4 1.6 1,8

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

1274 6.35 5248 1323 6.92 5,718 1371 5.54 6204

1316 7.20 6960 1364 7.79 6,437 1410 6.41 6939

1360 8.14 6734 1406 8.76 7,239 1450 7.40 7759

1406 9.20 7605 1449 9.83 8,129 1492 8.48 8666

1453 10.36 8568 1495 11.02 9,111 1536 9.69 9667

1501 11.64 9627 1541 12.32 10,190

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 1066 to 1283 rpm. Alternate high-

static drive range is 1332 to 1550. Other rpms require a field-supplied drive.

Refer to this page for general Fan Performance Data notes.

NOTE: Maximum continuous bhp is 10.20 (208/230, 575 v) or 11.80 (460 v)

and the maximum continuous watts are 9510 (208/230, 575 v) or 11,000

(460 v). Do not adjust motor rpm such that motor maximum bhp and/or

watts is exceeded at the maximum operating cfm. See Table 25 for more

information.

AIRFLOW

(cfm)

Table 21 -- Fan Performance -- 48TMF028 (High Heat Units)*

AVAILABLE EXTERNAL STATIC PRESSURE (in, wg)

0.2 0.4 0,6 0.8 1.0 1.2

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

7,000 992 4.05 3,348 1051 4.44 3,668 1106 4.83 3995 1160 5.24 4331 1212 5.65 4675 1262 6.08 5026

7,500 1055 4.77 3,947 1110 5.17 4,277 1162 5.58 4615 1214 6.00 4960 1263 6.43 5312 1311 6.86 5672

8,000 1118 5.58 4,610 1170 5.99 4,950 1220 6.41 5298 1268 6.84 5653 1315 7.27 6014 1361 7.72 6382

8,500 1182 6.46 5,339 1231 6.88 5,690 1278 7.31 6047 1324 7.75 6411 1369 8.20 6782 1413 8.66 7158

9,000 1246 7.42 6,136 1292 7.86 6,498 1337 8.30 6865 1381 8.75 7239 1424 9.21 7618 1466 9.68 8003

9,500 1310 8.47 7,005 1354 8.92 7,377 1397 9.38 7754 1439 9.84 8137 1480 10.31 8525 1520 10.79 8918

10,000 1374 9.61 7,947 1416 10.07 8,329 1457 10.54 8715 1497 11.02 9107 1537 11.50 9504 -- -- --

10,500 1439 10.84 8,964 1479 11.32 9,356 1518 11.79 9752 .........

11,000 1503 12.17 10,059 1542 12.65 10,460 ............

11,250 1536 12.86 10,636 ...............

AIRFLOW

(cfm)

7,000

7,500

8,000

8,500

9,000

9,500

10,000

10,500

11,000

11,250

AVAILABLE EXTERNAL STATIC PRESSURE(in. wg)

1.4 1.6 1.8

Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts

1311 6.51 5385 1359 6.96 5751 1405 6.00 6124

1358 7.30 6039 1403 7.76 6412 1448 6.84 6792

1405 8.17 6767 1560 8.63 7137 1492 7.75 7524

1456 9.12 7541 1498 9.59 7929 1539 8.75 8323

1507 10.15 8393 1548 10.63 8790 -- -- --

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 1066 to 1283 rpm. Alternate high-

static drive range is 1332 to 1550. Other rpms require a field-supplied drive,

Refer to this page for general Fan Performance Data note&

NOTE: Maximum continuous bhp is 10.20 (208/230, 575 v) or 11.80 (460 v)

and the maximum continuous watts are 9510 (208/230, 575 v) or 11,000

(460 v). Do not adjust motor rpm such that motor maximum bhp and/or

watts is exceeded at the maximum operating cfm. See Table 25 for more

information.

GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES

1. Static pressure losses (i.e., economizer) must be added to external

static pressure before entering Fan Performance table.

2. Interpolation is permissible. Do not extrapolate.

3. Fan performance is based on wet coils, clean filters, and casing losses.

See Table 23 for accessory/FlOP static pressure information.

4. Extensive motor and drive testing on these units ensures that the

full horsepower and watts range of the motor can be utilized with

confidence. Using fan motors up to the watts or bhp rating shown will not

result in nuisance tripping or premature motor failure. Unit warranty will

not be affected.

5. Use of a field-supplied motor may affect wire size. Contact your Carrier

representative for details.

UNIT

48TM

016

020

025

028

Table 22 -- Air Quantity Limits

MINIMUM

COOLING

CFM

4500

5400

6000

7000

MINIMUM

HEATING CFM

Low Heat High Heat

3800 3800

4750 5450

MAXIMUM

CFM

7,500

9,000

10,000

11,250

Table 23- Accessory/FlOP Static Pressure (in. wg)* -- 48TM016-028

FlOP

COMPONENT

EconoMi$erlV and EconoMi$er2

MoistureMi$er TM Dehumidification

LEGEND

-- Factory-Installed Option

*The static pressure must be added to external static pressure. The sum and the evaporator entering-air cfm should then

be used in conjunction with the Fan Performance tables to determine blower rpm and watts.

10,000 11,250

0.120 0.140

0.197 0.250

Table 24 -- Fan Rpm at Pulley Settings*

UNIT

48TM 0 l& 1 11/2 2

016f tt tt tt tt 1021

016"* tt tt tt tt 1200

020f tt tt 1095 1077 1058

020** ff ff 1287 1265 1243

025f ff ff ff ff 1151

025** ff ff ff ff 1369

028f ff ff 1283 1269 1247

028** ff ff ff ff 1551

*Approximate _n rpm shown,

tlndicates standard drive package,

**Indicates alternate drive package.

MOTOR PULLEY TURNS OPEN

21/2 3 31/2 4 41/2 5 51/2 6

1002 984 965 947 928 910 891 873

1178 1156 1134 1112 1091 1069 1047 1025

1040 1021 1002 984 965 947 928 910

1222 1200 1178 1156 1134 1112 1091 1069

1132 1114 1095 1077 1058 1040 1021 1002

1347 1325 1303 1281 1259 1237 1215 1193

1225 1203 1182 1160 1138 1116 1095 1066

1524 1497 1470 1443 1415 1388 1361 1332

l-tDue to belt and pulley size, pulley cannot be set to this number of turns open.

UNIT UNIT

48TM VOLTAGE

208/230

016 460

575

208/230

020 460

575

208/230

025 460

575

208/230

028 460

575

LEGEND

BHP -- Brake Horsepower

BkW -- Brake Kilowatts

Table 25 -- Evaporator-Fan Motor Data

MAXIMUM MAXIMUM MAXIMUM

ACCEPTABLE ACCEPTABLE ACCEPTABLE MAXIMUM

CONTINUOUS CONTINUOUS OPERATING AMP DRAW

BHP* BkW* WATTS

6.13 4,57 5,180

5.90 4.40 5,180

8.70 6.49 7,915

9.50 7.08 8,640

8.70 6.49 7,915

10.20 7.61 9,510

11.80 8.80 11,000

10.20 7.61 9,510

15.8

7.9

6.0

15.8

7.9

6.0

22.0

13.0

10.0

28.0

14.6

13.0

Table 26 -- Evaporator-Fan Motor Efficiency

*Extensive motor and electrical testing on these units ensures that the full

horsepower (brake kilowatt) range of the motors can be utilized with confi-

dence. Using fan motors up to the horsepower (brake kilowatt) ratings shown

in this table will not result in nuisance tripping or premature motor failure.

Unit warranty will not be affected.

NOTE: All indoor-fan motors 8 hp and larger meet the minimum efficiency

requirements as established by the Energy Policy Act of 1992 (EPACT) effec-

tive October 24, 1997.

UNIT MOTOR EFFICIENCY

48TM (%)

5 Hp 87.5

7.5 Hp 88.5

t0 Hp 89.5

NOTE: All indoor-fan motors 5 hp and larger meet the minimum efficiency

requirements as established by the Energy Policy Act of 1992 (EPACT) effec-

tive October 24, 1997.

Operating Sequence

COOLING, UNITS WITHOUT ECONOMIZER -- When

thermostat calls for cooling, terminals G and YI me energized.

The indoor (evapolator) fan contactor (IFC), compressor con-

tactor no. 1 (C l) and outdoor-fan contactor (OFC) me ener-

gized, and evaporator-fan motol: compressor no. 1, and both

condenser fans st_ul. The condenser-fan motors mn continuous-

ly while unit is cooling. If the thermostat c_dls for a second stage

of cooling by energizing Y2, complessor contactor no. 2 (C2) is

energized and compressor no. 2 stalls.

When the thermostat is satisfied, CI and C2 me deener-

gized and the compressors and outdoor (condenser) fan motors

(OFM) shut off. After a 30-second delay, the indoor (evapora-

tor) fan motor (IFM) shuts off. If the therlnostat fan selector

switch is in the ON position, the evaporator-fan motor will run

continuously.

HEATING. UNITS WITHOUT ECONOMIZER -- When

the thermostat calls for heating, terminal WI is energized. In

order to prevent thermostat short-cycling, the unit is locked

into the Heating mode for at least 1 minute when WI is ener-

gized. The induced-draft motor (IDM) is then energized and

the burner ignition sequence begins. The indoor (evaporator)

fan motor (IFM) is energized 45 seconds after a flame is

ignited. On units equipped for two stages of heat, when addi-

tional heat is needed, W2 is enelgized and the high-fire sole-

noid on the main gas valve (MGV) is energized. When the

thermostat is satisfied and WI and W2 me deenergized, the

IFM stops after a 45-second time-off delay.

COOLING. UNITS WITH ECONOMISERIV -- When free

cooling is not available, the compressol_ will be controlled by

the zone thermostat. When free cooling is available, the

outdoor-air dalnper is modulated by the EconoMiSerlV control

to provide a 50 to 55 F supply-air temperatme into the zone. As

the supply-air temperature fluctuates above 55 or below 50 H

the dampers will be modulated (open or close) to bring the

supply-air temperature back within the set point limits.

For EconoMiSerlV operation, there must be a thermostat

call for the fan (G). This will move the damper to its minimum

position during the occupied mode.

Above 50 F supply-air temperature, the dalnpers will modu-

late from 100% open to the minimum open position. From 50 F

to 45 F supply-air temperature, the dampers will maintain

at the minimum open position. Below 45 F the dampers will

be completely shut. As the supply-air temperature rises, the

dampers will come back open to the minimum open position

once the supply-air temperature rises to 48 E

If optional power exhaust is inst_dled, as the outdoor-air

damper opens and closes, the power exhaust fans will be ener-

gized and deenergized.

If field-installed accessory CO2 sensors are connected to the

EconoMiSer IV control, a demand controlled ventilation strate-

gy will begin to operate. As the CO2 level in the zone increases

above the CO2 set point, the minimum position of the damper

will be increased proportionally. As the CO2 level decreases

because of the increase in fresh all: file outdoor-air damper will

be proportionally closed. Dmnper position will follow the high-

er demand condition from DCV mode or free cooling mode.

Damper movement from full closed to lull open (or vice

velsa) will take between 11/2and 21/2 minutes.

If free cooling can be used as determined from the appropri-

ate changeover command (switch, dry bulb, enthalpy curve,

diffelential dry bulb, or differential enflmlpy), a call for cooling

(YI closes at the thermostat) will cause the control to modulate

the dalnpers open to maintain the supply air temperature set

point at 50 to 55 E

As the supply air temperature drops below the set point

range of 50 to 55 H the control will modulate the outdoor-air

dampers closed to maintain the proper supply-air temperature.

HEATING. UNITS WITH ECONOMISERIV -- When the

room thermostat calls for heat, the heating controls are ener-

gized as described in file Heating, Units Wifllout Economizer

section. When the indoor fan is energized, the economizer

damper moves to the minimum position. When the indoor fan

is off. the economizer dmnper is fully closed.

COOLING. UNITS WITH ECONOMISER2, PREMIER-

LINK TM CONTROL AND A THERMOSTAT -- When free

cooling is not available, the compressors will be controlled by

file PremierLink control in response to the YI and Y2 inputs

from the thermostat.

The PremierLink control will use the following information

to determine if flee cooling is available:

• Indoor fan has been on for at least 30 seconds.

• The SPT. SAT. and OAT inputs must have valid readings.

• OAT must be less than 75 E

• OAT must be less than SPT.

• Enthalpy must be LOW (may be jumpered if an enthalpy

sensor not available).

• Economizer position is NOT forced.

Pre-cooling occurs when the is no c_fll from the fllerlnostat

except G Pie-cooling is defined as the economizer modulates

to provide 70 F supply all:

When free cooling is awdlable the PremierLink control will

control the compressors and economizer to provide a supply-

air temperature determined to meet the YI and Y2 calls from

file thermostat using the following thlee routines. The three

control routines are based on OAT.

The 3 routines ale based on OAT where:

SASP = Supply Air Set Point

DXCTLO = Direct Expansion Cooling Lockout Set Point

PID = Proportional Integral

Routine 1 (OAT < DXCTLO)

•YI energized - economizer maintains a SASP =

(SATLOI + 3).

• Y2 energized - economizer maintains a SASP =

(SATLO2 + 3).

Routine 2 (DXCTLO < OAT < 68 F)

• If only YI energized, the economizer maintains a SASP

= (SATLOI + 3).

•If SAT > SASP + 5 and economizer position > 80%,

economizer will go to minimum position for 3 minutes or

until SAT > 68 F.

•First stage of mechanical cooling will be energized.

• Integrator resets.

• Economizer opens again and controls to current SASP

after stage one on for 90 seconds.

• With YI and Y2 energized economizer maintains an

SASP = SATLO2 + 3.

• If SAT > SASP + 5 and economizer position >80%,

economizer will go to minimum position for 3 minutes or

until SAT > 68 IF.

• If compressor one is on then second stage of mechanical

cooling will be energized. Otherwise the first stage will

be energized.

• Integrator resets.

• Economizer opens again and controls to SASP after

stage one on for 90 seconds.

Routine 3 (OAT > 68)

• Economizer is opened 100%.

• Compressors 1and 2 are cycled based on YI and Y2

using minimum on and off times and watching the sup-

ply air tempemtme as compared to SATLOI and

SATLO2 set points.

If optional power exhaust is installed, as the outdoor-_fir

damper opens and closes, the power exhaust fans will be ener-

gized and deenergized.

If field-inst_dled accessory CO2 sensors are connected to the

PremierLink TM control, a PID-controlled demand ventilation

strategy will begin to operate. As the CO2 level in the zone

increases above the CO2 set point, the minimum position of the

dmnper will be increased proportionally. As the CO2 level

decreases because of the increase in fresh all: the outdoor-air

dmnper will be proportionally closed.

HEATING. UNITS WITH ECONOMISER2, PREMIERLINK

CONTROL AND A THERMOSTAT -- When the thermostat

c_dls for heating, terminal WI is energized. The PremierLink

control will move the economizer dmnper to the minimum

position if there is a c_dl for G and closed if there is a call for

WI without G In order to prevent thermostat from short cy-

cling, the unit is locked into the heating mode for at least

10 minutes when WI is energized. The induced-draft motor is

then energized and the burner ignition sequence begins.

On units equipped for two stages of heat, when additional

heat is needed, W2 is energized and the high-fire solenoid on

the main gas valve (MGV) is energized. When the thermostat

is satisfied and WI is deenergized, the IFM stops after a

45-second time-off delay unless G is still maintained.

COOLING. UNITS WITH ECONOMISER2, PREMIER-

LINK CONTROL AND A ROOM SENSOR -- When free

cooling is not available, the compressors will be controlled by

the PremierLink controller using a PID Error reduction c_dcula-

tion as indicated by Fig 47.

The PremierLink controller will use the following informa-

tion to determine if fiee cooling is available:

• Indoor fan has been on for at least 30 seconds.

•The SPT. SAT. and OAT inputs must have valid readings.

• OAT must be less than 75 F.

• OAT must be less than SPT.

•Enthalpy must be LOW (may be jumpered if and

enthalpy sensor is not available).

• Economizer position is NOT forced.

When free cooling is av_filable, the outdoor-air damper is

positioned through the use of a Proportional Integral (PID)

control process to provide a calculated supply-air temperature

into the zone. The supply air will maint_fin the space tempera-

ture between the heating and cooling set points as indicated in

Fig. 48.

The PremierLink will integrate the compressors stages with

the economizer based on similar logic as the three routines list-

ed in the previous section. The SASP will float up and down

based on the enor reduction calculations that compare space

temperature and space set point.

When outdoor-air temperature conditions require the econo-

mizer to close for a compressor stage-up sequence, the econo-

mizer control integrator is reset to zero after the stage-up

sequence is completed. This prevents the supply-air tempera-

ture from &opping too quickly and creating a freeze condition

that would make the compressor turn off prematurely.

The high space set point is used for DX (direct expansion)

cooling control, while the economizer space set point is a

c_dculated value between the heating and cooling set points.

The economizer set point will always be at least one degree

below the cooling set point, allowing for a smooth transition

from mechanical cooling with economizer assist, back to

economizer cooling as the cooling set point is achieved.

The compressors may be used for initial cooling then the

PremierLink controller will modulate the economizer using an

error reduction calculation to hold the space temperature

between the heating and cooling set points. See Fig. 48.

The controller uses the following conditions to determine

economizer cooling:

• Enthalpy is Low

•SAT reading is available

• OAT reading is available

• SPT reading is available

• OAT < SPT

• Economizer Position is NOT forced

If any of the above conditions are not met, the economizer

submaster reference (ECSR) is set to maximum limit and the

damper moves to minimum position. The operating sequence

is complete. The ECSR is recalculated every 30 seconds.

If an optional power exhaust is installed, as the outdoor-air

damper opens and closes, the power exhaust fans will be

energized and deenergized.

If field-installed accessory CO2 sensors me connected to

the PremierLink control, a PID-controlled demand ventilation

strategy will begin to operate. As the CO2 level in the zone

increases above the CO2 set point, the minimum position of the

damper will be increased proportionally. As the CO2 level

decreases because of the increase in flesh all: the outdoor-air

damper will be proportionally closed.

I--

75,

744

734

724

71 4

704

694

68 J

TEMPERATURE CONTROL

TIME

...... SET POINT

--TEMPERATURE

NOTE: PremierLink control performs smart staging of 2 stages of DX

cooling and up to 3 stages of heat.

Fig. 47 -- DX Cooling Temperature

Control Example

TEMPERATURE CONTROL

741

72 ......... _ .................................... ------COOL SETPOINT

71t \ j __ -- TEMPERATURE

704 ........ _ .......................... --- HEAT SETPOINT

TIME

Fig. 48 -- Economizer Temperature

Control Example

HEATING.UNITWITHECONOMISER2,PREMIERLINK

CONTROLANDA ROOMSENSOR-- Every40 seconds

thecontrollerwillcalculatetherequiredheatstages(maximum

of3)tomaintainsupplyairtemperature(SAT)if thefoflowing

qu_flifyingconditionsalemet:

• Indoorfanhasbeenonforatleast30seconds.

• COOLmodeisnotactive.

• OCCUPIED,TEMRCOMPENSATEDSTARTorHEAT

modeisactive.

• SATreadingisavailable.

• Fireshutdownmodeisnotactive.

If alloftheaboveconditionsaremet,thenumberofheat

stagesis c_dculated; otherwise file required number of heat

stages will be set to 0.

If the PremierLink controller determines that heat stages are

required, the economizer damper will be moved to minimum

position if occupied and closed if unoccupied.

Staging should be as follows:

If Heating PID STAGES=2

• HEAT STAGES=I (75% capacity) will energize HSI

• HEAT STAGES=2 (100% capacity) will energize HS2

In order to prevent short cycling, the unit is locked into the

Heating mode for at least 10 minutes when HS 1 is deenergizedi

When HSI is energized the induced<haft motor is then

energized and the burner ignition sequence begins. On units

equipped for two stages of heat, when additional heat is need-

ed, HS2 is energized and the high-fire solenoid on the main gas

valve (MGV) is energized. When the space condition is satis-

fied and HSI is deenergized the IFM stops after a 45-second

time-off delay unless in the occupied mode. The fan will mn

continuously in the occupied mode as required by natiomfl

energy and fresh air standards.

SERVICE

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Electrical shock

could cause personal injury.

Cleaning- Inspect unit interior at beginning of each

heating and cooling season and as operating conditions require.

Remove unit top panel and/or side panels for access to unit

interior:

MAIN BURNER -- At file beginning of each heating season,

inspect for deterioration or blockage due to conosion or other

causes. Observe the main burner flames. Refer to Main Burn-

ers section on page 46.

FLUE GAS PASSAGEWAYS -- The flue collector box and

heat exchanger cells may be inspected by removing heat

exchanger access panel (Fig. 4-6), flue box covel: and main

burner assembly. Refer to Main Burners section on page 46 for

burner removal sequence. If cleaning is required, remove heat

exchanger baffles and clean tubes with a wire brush.

Use caution with ceramic heat exchanger baffles. When

installing retaining clip, be sure the center leg of the clip

extends inw_ud towtud baffle. See Fig. 49.

COMBUSTION-AIR BLOWER--Clean periodically to

assure proper airflow and heating efficiency. Inspect blower

wheel every ftfll and periodically during heating season. For the

first heating season, inspect blower wheel bi-monthly to deter-

mine proper cleaning frequency.

CERAMIC

BAFFLE

CLIP_

HEAT EXCHANGER

TUBES

NOTE: One baffle and clip will be in each uppertube ofthe heat

exchanger.

Fig. 49 -- Removing Heat Exchanger Ceramic

Baffles and Clips

To inspect blower wheel, remove heat exchanger access

panel. Shine a flashlight into opening to inspect wheel. If

cleaning is required, remove motor and wheel assembly by

removing screws holding motor mounting plate to top of

combustion fan housing. The motor and wheel assembly will

slide up and out of file fan housing. Remove the blower wheel

from the motor shaft and clean with a detergent or solvent.

Replace motor and wheel assembly.

EVAPORATOR COIL- Clean as required with a commer-

cial coil cleanel:

CONDENSER COIL--Clean condenser coil annually and

as required by location and outdoor-air conditions. Inspect coil

monthly -- clean as required.

CONDENSATE DRAIN- Check and clean each year at

start of cooling season. In wintel: keep drains and traps dry.

FILTERS -- Clean or replace at stmt of each heating and cool-

ing season, or more often if operating conditions require. Refer

to Table 1 for type and size.

NOTE: The 48TM028 unit requires industrial grade throw-

away filters capable of withstanding face velocities up to

625 fpm. Ensure that replacement filters for the 48TM028

units m'e rated for 625 fpm.

OUTDOOR-AIR INLET SCREENS -- Clean screens with

steam or hot water and a mild detergent. Do not use throwaway

filters in place of screens.

Lubrication

COMPRESSORS- Each compressor is charged with the

correct amount of oil at the factory. Conventional white oil

(Sontext 200LT) is used. White oil is compatible with 3GS oil,

and 3GS oil may be used if the addition of oil is required. See

compressor nameplate for original oil charge. A complete

recharge should be four ounces less than the original oil chmge.

When a compressor is exchanged in the field it is possible that

a major portion of the oil from the replaced compressor may

still be in the system. While this will not affect the reliability of

file replacement compressor, the extra oil will add rotor drag

and increase power usage. To remove this excess oil, an access

valve may be added to file lower portion of the suction line at

file inlet of the compressol: The compressor should then be run

for 10 minutes, shut down, and the access v_dve opened until

no oil flows. This should be repeated twice to make sine the

proper oil level has been achieved.

FANSHAFTBEARINGS--Lubricatebearingsat least

every6monthswithsuitablebearinggrease.Extendedgrease

lineisprovidedforfarsidefanbearing(oppositedriveside).

Typicallubricantsaregivenbelow:

MANUFACTURER ] LUBRICANT

Texaco Regal AFB-2*

Mobil Mobilplex EP No. 1

Sunoco Prestige 42

Texaco Multifak 2

*Preferred lubricant because it contains rust and oxidation inhibitors.

CONDENSER AND EVAPORATOR-FAN MOTOR

BEARINGS -- The condenser-fan and evaporator-fan motol.s

have permanently sealed bearings, so no field lubrication is

necessary.

Evaporator Fan Performance Adjustment

(Fig. 50 and 51) -- Fan motor pulleys are facto Uset for

speed shown in Table 1.

To change fan speeds:

1. Shut off unit power supply.

2. Ix)osen nuts on the 2 carnage bolts in the motor mounting

base. Instldl jacking bolt and plate under motor base (bolt

and plate are shipped in installer's packet). Using bolt and

plate, raise motor to top of slide lind remove belt. Secure

motor in this position by tightening the nuts on the car-

riage bolts.

3. Ix)osen movable-pulley flange setscrew (see Fig. 50).

4. Screw movable flange toward fixed flange to increase

speed and away from fixed flange to decrease speed. [n-

creasing fan speed increases load on motol: Do not ex-

ceed maximum speed specified in Table 1.

See Table 22 for air quantity limits.

5. Set movable flange at nearest keyway of pulley hub and

tighten setscrew. (See Ntble 1 for speed change for each

full turn of pulley flange.)

6. Replace and tighten belts. See Belt Tension Adjustment

section on page 45.

To align fan and motor pulleys:

1. Loosen fan pulley setscrews.

2. Slide fan pulley along fan shaft.

3. Make angular alignment by loosening motor from

mounting plate.

Evaporator Fan Service and Replacement -- The

48TM units use a fan motor mounting system that features a

slide-out motor mounting plate. See Fig. 51. To replace or ser-

vice the motol; slide out the bracket.

1. Remove the evaporator-fan access panel and the heat-

ing control access panel.

2. Remove the center post (located between the evaporator

fan and heating control access panels) and all screws

securing it.

3. Loosen nuts on the 2 carriage bolts in the motor mounting

base.

4. Using jacking bolt under motor base, raise motor to top of

slide and remove belt. Secure motor in this position by

tightening the nuts on the cluriage bolts.

5. Remove the belt drive.

6. Remove jacking bolt and tapped jacking bolt plate.

7. Remove the 2 screws that secure the motor mounting

plate to the motor support channel.

8. Remove the 3 screws from the end of the motor support

channel that interfere with the motor slide path.

9. Slide out the motor and motor mounting plate.

10. Disconnect wiring connections and remove the 4 mount-

ing bolts.

11. Remove the motol:

12. To install the new motor, reverse Steps 1-11.

SECOND BELT

ON 10 HP MOTOR

ONLY \

PULLEY

STRAIGHTEDGE MUST

WITH BELT

ENSURE PROPER

CLEARANCE BETWEEN

BELT(S) AND FAN

MOVABLE

FDkNGES

MOTOR AND FAN ,L_g-_

SHAFTS MUST BE

PARALLEL SETSCREWS

FIXED FLANGES

SINGLE-GROOVE

Fig. 50- Evaporator-Fan Pulley

and Adjustment

FAN PULLEY_z

BELT __

"_-'_-TOR

MOTOR SUPPORT

CHANNEL

CENTER POST

OTOR PULLEY

MOTOR

tJ _ MOTOR

_"_l_(..,,,.---.,,,_ MOUNTING

__X PlaTE

"-722C

JACKING BOLT

NOTE: A 31/2-in. bolt and threaded plate are included in the

installer's packet. They should be added to the motor support chan-

nel below the motor mounting plate to aid in raising the motor. The

plate part number is 50DP503842. The adjustment bolt is 3/8-16 x

13/4 in. LG.

Fig. 51 -- Evaporator-Fan Motor Section

Belt Tension Adjustment -- To adjust belt tension:

1. Loosen fan motor bolts.

2. Turn motor jacking bolt to move motor mounting plate up

or down for proper belt tension (:V8 in. deflection at

midspan with one finger [9 lb forcel).

3. Tighten nuts.

4. Adjust bolts and nut on mounting plate to secure motor in

fixed position.

Condenser-Fan Adjustment

48TM016,020,028 UNITS (Fig. 52)

1. Shut off unit power supply.

2. Remove access panel(s) closest to the fan to be adjusted.

3. Loosen fan hub setscrews.

4. Adjust fan height on shall using a straightedge placed

across the fan orifice.

5. Tighten setscrews and leplace panel(s).

6. Turn on unit power.

48TM025 UNITS (Fig. 53)

1. Shut off unit power supply.

2. Remove fan top-grille assembly and loosen fan hub

screws.

3. Adjust fan height on unit, using a straightedge placed

across the fan orifice.

4. Tighten setscrews and replace rubber hubcap to prevent

hub from rusting to motor shaft.

5. Fill hub recess with permagum if rubber hubcap is

missing.

Power Failure -- Dampers have a spring return. In event

of power failure, &impeLs will return to fully closed position

until power is restored. Do not manually ol)eraw economizer

mo?oF.

I) ¢,

NOTE: Dimensions are in inches,

Fig. 62- Condenser Fan Adjustment,

48TM016,020,028

Refrigerant Charge -- Amount of refrigerant charge is

listed on unit nameplate and in Table 1. Refer to Cmrier GTAC

II; Module 5; Charging, Recovery, Recycling, and Reclama-

tion section for charging methods and procedures. Unit

panels must be in place when unit is operating during charging

procedure.

NOTE: Do not use recycled refrigerant as it may contain

contmninants.

NO CHARGE- Use standard evacuating techniques. After

evacuating system, weigh in the specified amount of refriger-

ant (refer to Table 1).

LOW CHARGE COOLING -- Using cooling charging chart

(see Fig. 54), add or remove refrigerant until conditions of the

chart are met. Note that charging chart is different from those

normally used. An accurate pressure gage and temperature-

sensing device is required. Charging is accomplished by

ensuring the proper amount of liquid subcooling. Measure

liquid line pressure at the liquid line service valve using

pressure gage. Connect temperature sensing device to the

liquid line near the liquid line sela_ice valve and insufate it so

that outdoor mnbient temperature does not affect reading.

TO USE THE COOLING CHARGING CHART -- Use the

above temperature and pressure readings, and find the intersec-

tion point on the cooling charging ch_ut. If intersection point

on chmt is above line, add refrigerant. If intersection point on

chart is below line, carefully recover some of the chmge.

Recheck suction pressure as chmge is adjusted.

NOTE: Indoor-air cfm must be within normal operating range

of unit. All outdoor fans must be operating.

The TXV (thermostatic expansion valve) is set to maintain

between 15 and 20 degrees of superheat at the complessors.

The valves me factory set and should not require re-adjustment.

MOISTUREMISER TM SYSTEM CHARGING -- The sys-

tem charge for units with the MoistmeMiSer option is greater

than that of the standard unit alone. The charge for units with

this option is indicated on the unit nameplate drawing. To

charge systems using the MoistmeMiSer dehumidification

package, fully evacuate, recovek and re-charge the system to

the nameplate specified charge level. To check or adjust

refrigerant charge on systems using the MoistureMiSer

dehumidification package, charge per the stan&_rd subcooling

charts. The subcooler MUST be deenergized to use the

charging charts. The charts reference a liquid pressure (psig)

and temperature at a point between the condenser coil and the

subcooler coil. A tap is provided on the unit to measure liquid

pressure entering the subcooler (leaving the condenser).

BOTH CIRCUITS

ALL OUTDOOR FANS MUST BE OPERATING

- GRI 7

NOTE: Dimensions are in inches.

Fig. 53 -- Condenser-Fan Adjustment,

48TM025

IF BELOW CURVE

50 100 150 200 250 300 350 400

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Fig. 54 -- Cooling Charging Chart

Gas Valve Adjustment

NATURAL GAS--The gas valve ()pens and closes in

response to the thermostat or limit control.

When power is supplied to valve terminals DI and C2, the

main valve opens to its preset position.

The regular factoly setting is stmnped on the valve body

(3.3 in. wg).

To adjust regulator:

1. Set thermostat at setting for no call for heat.

2. Turn main gas valve to OFF position.

3. Remove I/s-in. pipe plug from manifold or gas valve

pressure tap connection. Install a suitable pressure-

measuring device.

4. Set m_dn gas v_dve to ON position.

5. Set thermostat at setting to call for heat.

6. Remove screw cap covering regulator adjustment screw

(See Fig. 55).

7. Turn adjustment screw clockwise to increase pressure or

counterclockwise to decrease pressure.

8. Once desired pressure is established, set thermostat set-

ting for no call for heat, turn off main gas valve, remove

pressure-measuring device, and replace l/s-in, pipe plug

and screw cap.

2 LEADS, #18 WIRE 1/32 INSULATION,

60OV.

I ill/'.¢5_\ _1D-1 D-2

INLET PRESSURE TAP /

(PLUGGED) /

1/8 - 27 N.P.T. THDS.

REGULATOR

ADJUSTMENT SCREW

REMOVE COVER)

OUTLET PRESSURE

/TAP (PLUGGED)

_/ 1/8-27 N.P.T. THDS.

i RECEPTACLE AND

TAB COMBINATION

TERMINAL

_ _PILOT CONNECTION

FOR 1/4' O.D. TUBING

(PLUGGED)

RECEPTACLE TERMINAL

Fig. 55 -- Gas Valve

Main Burners -- For all applications, main burners me

factory set and should require no adjustment.

MAIN BURNER REMOVAL

1. Shut off (field-supplied) manual main gas valve.

2. Shut offpowerto unit.

3. Remove unit control box access panel, burner section

access panel, and center post (Fig. 4-6).

4. Disconnect gas piping from gas valve inlet.

5. Remove wires from gas valve.

6. Remove wires from rollout switch.

7. Remove sensor wire and ignitor cable from IGC board.

8. Remove 2 screws securing manifold bracket to basepan.

9. Remove 2 screws that hold the burner support plate

flange to the vestibule plate.

10. Lift burner assembly out of unit.

CLEANING AND ADJUSTMENT

I. Remove burner rack from unit as described in Main

Burner Removal section above.

2. Inspect burners, and if dirty, remove burners from rack.

3. Using a soft brush, clean burners and crossover port as

required.

4. Adjust spark gap. See Fig. 56.

5. Reinst_dl burners on rack.

6. Reinst_dl burner rock as described above.

Filter Drier- Replace whenever refiigerant system is

exposed to atmosphere.

Protective Devices

COMPRESSOR PROTECTION

Overcurrent -- Each compressor has internal line break motor

protection.

Crankcase Heater -- All units tue equipped with a 70-watt

crankcase heater to prevent absorption of liquid refrigerant by

oil in the crankcase when the compressor is idle. The crank-

case heater is energized whenever there is a main power to the

unit and the compressor is not energized.

IMPORTANT: After a prolonged shutdown or servicing,

enelgize the crankcase heaters for 24 hours before start-

ing the compressors.

Compressor Lockout -- If any of the safeties (high-pressure,

low-pressure, freeze protection thermostat, compressor intern_fl

thermostat) trip, or if there is loss of power to the compressors,

the cooling lockout (CLO) will lock the compressors off. To

reset, manually move the thermostat setting.

EVAPORATOR-FAN MOTOR PROTECTION -- A man-

ual reset, calibrated trip, magnetic circuit breaker protects

against overcurrent. Do not bypass connections or increase the

size of the breaker to correct trouble. Determine the cause and

conect it before resetting the breakel:

CONDENSER-FAN MOTOR PROTECTION -- Each

condenser-fan motor is internally protected against

overtemperature.

HIGH-PRESSURE AND LOW-PRESSURE SWITCHES --

If either switch trips, or if the compressor overtemperature

switch activates, that lefrigerant circuit will be automatically

locked out by the CLO. To reset, manually move the thermo-

stat setting.

FREEZE PROTECTION THERMOSTAT (FPT) -- An FPT

is located on the top and bottom of the evaporator coil. They

detect frost build-up and turn off the compressol, _dlowing the

coil to clem: Once the frost has melted, the compressor can be

reenergized by resetting the compressor lockout.

Relief Devices -- All units have relief devices to protect

against &_mage from excessive pressures (i.e., fire). These

devices protect the high and low side.

Control Circuit, 24-V--This control circuit is pro-

tected against overcurrent by a 3.2 mnp circuit breaker.

Breaker can be reset. If it trips, determine cause of trouble

before resetting. See Fig. 57 and 58 for typical wiring

diagrams.

Replacement Parts -- A complete list of replacement

parts may be obt_dned from any Canier distributor upon

request.

Diagnostic IGC Control LEDs-- The IGC board

has LEDs for diagnostic purposes. Refer to Troubleshooting

section on page 51.

Optional Hinged Access Doors --When the optional

service package is ordered or the if the hinged access dool_

option is ordeled, the unit will be provided with extermd and

internal hinged access dool_ to facilitate service.

Four extern_d hinged access dool_ me provided on size

016-025 units. Two external hinged doors m_e provided on size

028 units. All extermd dool_ m_eprovided with 2 lmge 1/4 turn

lmches with folding bail-type handles. (Complessor access

doors have one latch.) A single door is provided for filter and

drive access. One door is provided for control box access. The

control box access door is interlocked with the non-fused

disconnect which must be in the OFF position to open the dool:

Two doors me provided on 48TM016-025 units for access to

the compressor compartment.

Two internal access doors are provided inside the filter/

diive access door. The filter access door (on the left) is secmed

by 2 small 1/4 turn latches with folding bail-type handles. This

door must be opened prior to opening the chive access dooc

The drive access door is shipped with 2 sheet metal screws

holding the door closed. Upon initial opening of the door, these

screws may be removed and discarded. The door is then held

shut by the filter access dool: which closes over it.

I o_o

I0 (_ I(_ 0

48TMD016

o(_o

@ @ @

SEE

DETAIL_" I

48TMD020-028 AND 48TMF016

48TM F020-028

0 0 0

SPARK GAP.120"TO,140"

DETAIL"C"

Fig. 56 -- Spark Gap Adjustment

Q-

Fig. 57 -- Typical Wiring Schematic (48TM016,020 -- 208/230 V Shown)

CONTROL BOX 0

_ o COMPONENT ARRANGEMENT

[]

GAS SECTION

Ex_

--\ :[]: /_

[]

B_u

:ore,,,o,,'........,,, []','t, 'I

"°@ ......... F

r i[tr_ s_t i_[

..... 'I °: ]

Fig. 58 -- Typical Component Arrangement

LEGEND AND NOTES FOR FIG. 57 AND 58

LEGEND

AHA -- Adjustable Heat Anticipator LED -- Light-Emitting Diode

C -- Contactor, Compressor LOR -- Lockout Relay

CAP -- Capacitor LPS -- Low-Pressure Switch

CB -- Circuit Breaker LS -- Limit Switch

CO -- Cooling Compensator MGV -- Main Gas Valve

CH -- Crankcase Heater NEC -- National Electrical Code

CLO -- Compressor Lockout OAT -- Outdoor Air Temperature Sensor

COMP -- Compressor Motor OCCUP -- Occupancy Sensor

CR -- Control Relay OFC -- Outdoor-Fan Contactor

DM -- Damper Motor OFM -- Outdoor-Fan Motor

DU -- Dummy Terminal PL -- Plug Assembly

EQUIP -- Equipment PRI -- Primary

FPT -- Freeze Protection Thermostat QT -- Quadruple Terminal

FU -- Fuse RAT -- Return Air Temperature Sensor

GND -- Ground RS -- Rollout Switch

HPS -- High-Pressure Switch SN -- Sensor

HS -- Hall Effect Sensor SR -- Solenoid Relay

HV -- High Voltage SW -- Switch

I -- Ignitor TB -- Terminal Block

IAQ -- Indoor Air Quality Sensor TC -- Thermostat Cooling

IDM -- Induced-Draft Motor TH -- Thermostat Heating

IFC -- Indoor-Fan Contactor TRAN -- Transformer

IFCB -- Indoor-Fan Circuit Breaker

IFM -- Indoor-Fan Motor Q Terminal (Marked)

IGC -- Integrated Gas Unit Controller

L -- Light @ Terminal (Unmarked)

[]

Terminal Block

• Splice

Factory Wiring

Field Control Wiring

.... Option/Accessory Wiring

To indicate common potential

only; not to represent wiring,

Economizer Motor

Remote POT Field

Accessory

OAT Sensor

Disch Air Sensor

RAT Accessory Sensor

_>-_,-° Low Ambient Lockout Switch

NOTES:

1, Compressor and/or fan motor(s) thermally protected, Three-phase motors protected against primary single phasing conditions,

2, If any of the original wire furnished must be replaced, it must be replaced with Type 90 ° C or its equivalent,

3, Jumpers are omitted when unit is equipped with economizer,

4, IFCB must trip amps is equal to or less than 140% FLA,

5, On TRAN1 use BLK lead for 460-v power supply and ORN lead for 575-v power supply.

6, The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices; before replacing CLO check these devices.

7, Number(s) indicates the line location of used contacts, A bracket over (2) numbers signifies a single pole, double throw contact. An underlined num-

ber signifies a normally closed contact, Plain (no line) number signifies a normally open contact,

8, 620 Ohm, 1 watt, 5% resistor should be removed only when using differential enthalpy or dry bulb.

9, If a separate field supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded.

10, OAT sensor is shipped inside unit and must be relocated in the field for proper operation.

11, For field installed remote minimum position POT. remove black wire jumper between P and P1 and set control minimum position POT to the mini-

mum position,

TROUBLESHOOTING

Unit Troubleshooting- Refer to Tables 27-29 and

Fig. 59.

EconoMi$erlV Troubleshooting-- See Table 30

for EconoMiSer IV logic.

A functional view of the EconoMiSerlV is shown in

Fig. 60. Typic;d settings, sensor ranges, and jumper positions

are also shown. An EconoMiSerIV simulator proglam is

available from Carrier to help with EconoMiSerIV tlaining and

troubleshooting.

ECONOMISERIV PREPARATION -- This procedure is

used to prepare the EconoMiSerIV for troubleshooting. No

troubleshooting or testing is done by performing the following

procedure.

NOTE: This procedure requires a 9-v battery. 1.2 kilo-ohln

resistol: and a 5.6 kilo-ohm resistor which are not supplied

with the EconoMiSerlV.

IMPORTANT: Be sure to record the positions of all poten-tiometers before starting troubleshooting.

1. Disconnect power at TR and TRI. All LEDs should be

off. Exhaust fan contacts should be open.

2. Disconnect device at P and PI.

3. Jumper P to PI.

4. Disconnect wires at T and TI. Place 5.6 kilo-ohm resistor

across T and TI.

5. Jumper TR to 1.

6. Jumper TR to N.

7. [f connected, remove sensor from terminals So and +.

Connect 1.2 kilo-ohm 4074EJM checkout resistor across

terminals So and +.

8. Put 620-ohm resistor across terminals SR and +.

9. Set minimum position, DCV set point, and exhaust

potentiometers fully CCW (counterclockwise).

10. Set DCV maximum position potentiometer lially CW

(clockwise).

11. Set enthalpy potentiometer to D.

12. Apply power (24 vac) to termimds TR and TRI.

DIFFERENTIAL ENTHALPY-- To check differential

enthalpy:

1. Make sure EconoMiSerIV preparation procedure has

been performed.

2. Place 620-ohm resistor across So and +.

3. Pkice 1.2 kilo-ohm resistor across SR and +. The Free

Cool LED should be lit.

4. Remove 620-ohm resistor across So and +. The Free

Cool LED should turn off.

5. Return EconoMiSerlV settings and wiring to normal

after completing troubleshooting.

SINGLE ENTHALPY -- To check single enth;dpy:

1. Make sure EconoMiSerIV preparation procedure has

been performed.

2. Set the enthalpy potentiometer to A (fully CCW). The

Free Cool LED should be lit.

3. Set the enthalpy potentiometer to D (fully CW). The Free

Cool LED should turn off.

4. Return EconoMiSerIV settings and wiring to normal

after completing troubleshooting.

DCV (Demand Controlled Ventilation) AND POWER

EXHAUST -- To check DCV and Power Exhaust:

1. Make sure EconoMiSerIV preparation procedure has

been performed.

2. Ensure terminals AQ and AQI are open. The LED for

both DCV and Exhaust should be off. The actuator

should be fully closed.

3. Connect a 9-v batte qto AQ (positive node) and AQI

(negative node). The LED for both DCV and Exhaust

should turn on. The actuator should drive to between 90

and 95% open.

4. Turn the Exhaust potentiometer CW until the Exhaust

LED turns off. The LED should turn off when the

potentiometer is approximately 90%. The actuator should

_emain in position.

5. Turn the DCV set point potentiometer CW until the DCV

LED turns off. The DCV LED should turn off when the

potentiometer is approximately 9 v. The actuator should

chive fully closed.

6. Turn the DCV and Exhaust potentiometers CCW until

the Exhaust LED turns on. The exhaust contacts will

close 30 to 120 seconds after the Exhaust LED turns on.

7. Return EconoMiSerlV settings and wiring to norlnal

after completing troubleshooting.

DCV MINIMUM AND MAXIMUM POSITION -- To check

the DCV minimum and maximum position:

1. Make sure EconoMiSerlV preparation procedure has

been performed.

2. Connect a 9-v batte qto AQ (positive node) and AQI

(negative node). The DCV LED should turn on. The

actuator should drive to between 90 and 95% open.

3. Turn the DCV Maximum Position potentiometer to mid-

point. The actuator should drive to between 20 and 80%

open.

4. Turn the DCV Maximum Position potentiometer to fully

CCW. The actuator should drive fully closed.

5. Turn the Minimum Position potentiometer to midpoint.

The actuator should drive to between 20 and 80% open.

6. Turn the Minimum Position Potentiometer fully CW. The

actuator should drive fully open.

7. Remove the jumper from TR and N. The actuator should

chive fully closed.

8. Return EconoMi$erIV settings and wiring to normal

after completing troubleshooting.

SUPPLY-AIR INPUT -- To check supply-air input:

1. Make sure EconoMiSerIV preparation procedure has

been performed.

2. Set the Enthalpy potentiometer to A. The Free Cool LED

turns on. The actuator should drive to between 20 and

80% open.

3. Remove the 5.6 kilo-ohm resistor and jumper T to TI.

The actuator should drive fully open.

4. Remove the jumper across T and TI. The actuator should

&ive fully closed.

5. Return EconoMiSerIV settings and wiring to normal

after completing troubleshooting.

ECONOMISERIV TROUBLESHOOTING COMPLE-

TION -- This procedure is used to return the EconoMiSerlV

to operation. No troubleshooting or testing is done by perform-

ing the following procedure.

1. Disconnect power at TR and TRI.

2. Set enthalpy potentiometer to previous setting.

3. Set DCV maximum position potentiometer to previous

setting.

4. Set minimum position, DCV set point, and exhaust

potentiometel5 to previous settings.

5. Remove 620-ohm resistor from terminals SR and +.

6. Remove 1.2 kilo-ohm checkout lesistor from terminals

So and +. [fused, reconnect sensor from tenninals So and

7. Remove jumper fiom TR to N.

8. Remove jumper from TR to 1.

9. Remove 5.6 kilo-ohm resistor from T and TI. Reconnect

wires at T and TI.

10. Remove jumper fiom P to PI. Reconnect device a P and

PI.

11. Apply power (24 vac) to termimds TR and TRI.

Table 27 -- Cooling Service Analysis

PROBLEM CAUSE REMEDY

Compressor and Power failure. Call power company.

Condenser Fan Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.

Will Not Start. Defective thermostat, contactor, transformer, or control Replace component.

relay.

Insufficient line voltage. Determine cause and correct.

Incorrect or faulty wiring. Check wiring diagram and rewire correctly.

Thermostat setting too high. Lower thermostat setting below room temperature.

Compressor Will Not Faulty wiring or loose connections in compressor circuit. Check wiring and repair or replace.

Start but Condenser Fan Compressor motor burned out, seized, or internal over- Determine cause. Replace compressor.

Runs. load open.

Defective overload. Determine cause and replace.

Compressor locked out Determine cause for safety trip and reset lockout.

One leg of 3-phase power dead. Replace fuse or reset circuit breaker.

Determine cause.

Compressor Cycles Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge

(other than normally to nameplate.

satisfying thermostat). Defective compressor. Replace and determine cause.

Insufficient line voltage. Determine cause and correct.

Blocked condenser. Determine cause and correct.

Defective overload. Determine cause and replace.

Defective thermostat. Replace thermostat.

Faulty condenser4an motor. Replace.

Restriction in refrigerant system. Locate restriction and remove.

Compressor Operates Dirty air filter. Replace filter.

continuously. Unit undersized for load. Decrease load or increase unit size.

Thermostat set too low. Reset thermostat.

Low refrigerant charge. Locate leak, repair, and recharge.

Air in system. Recover refrigerant, evacuate system, and recharge.

Condenser coil dirty or restricted. Clean coil or remove restriction.

Excessive Head Dirty air filter. Replace filter.

Pressure. Dirty condenser coil. Clean coil.

Refrigerant overcharged. Recover excess refrigerant.

Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

suction line.

2. Replace TXV if stuck open or closed.

Air in system. Recover refrigerant, evacuate system, and recharge.

Condenser air restricted or air short-cycling. Determine cause and correct.

Head Pressure Too Low. Low refrigerant charge. Check for leaks, repair, and recharge.

Restriction in liquid tube. Remove restriction.

Excessive Suction High heat load. Check for source and eliminate.

Pressure. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

suction line.

2. Replace TXV if stuck open or closed.

Refrigerant overcharged. Recover excess refrigerant.

Suction Pressure Too Dirty air filter. Replace filter.

Low. Low refrigerant charge. Check for leaks, repair, and recharge.

Metering device or low side restricted. Remove source of restriction.

Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

suction line.

2. Replace TXV if stuck open or closed.

Insufficient evaporator airflow. Increase air quantity. Check filter and replace if

necessary.

Temperature too low in conditioned area. Reset thermostat.

Field-installed filter drier restricted. Replace.

LEGEND

TXV -- Thermostatic Expansion Valve

Table 28 -- Heating Service Analysis

PROBLEM

Burners Will Not

Ignite.

Inadequate Heating.

Poor Flame

Characteristics.

Burners Will Not Turn

Off.

LEGEND

GR -- Ground

CAUSE

Misaligned spark electrodes.

No gas at main burners.

Water in gas line.

No power to furnace.

No 24 v power supply to control circuit.

Miswired or loose connections.

Burned-out heat anticipator in thermostat.

Broken thermostat wires.

Dirty air filter.

Gas input to unit too low.

Unit undersized for application.

Restricted airflow.

Blower speed too low.

Limit switch cycles main burners.

Too much outdoor air.

Incomplete combustion (lack of combustion air)

results in:

Aldehyde odors, CO, sooting flame, or floating flame.

Unit is locked into Heating mode for a one minute

minimum.

REMEDY

Check flame ignition and sensor electrode positioning.

Adjust as needed.

Check gas line for air; purge as necessary. After purging

gas line of air, allow gas to dissipate for at least 5 min-

utes before attempting to relight unit.

Check gas valve.

Drain water and install drip leg to trap water.

Check power supply, fuses, wiring, and circuit breaker.

Check transformer. Transformers with internal overcur-

rent protection require a cool-down period before

resetting. Check 24-v circuit breaker; reset if necessary.

Check all wiring and wire nut connections.

Replace thermostat.

Run continuity check. Replace wires if necessary.

Clean or replace filter as necessary.

Check gas pressure at manifold. Clock gas meter for

input. If too low, increase manifold pressure or replace

with correct orifices.

Replace with proper unit or add additional unit.

Clean filter, replace filter, or remove any restrictions.

Install alternate motor, if applicable, or adjust pulley to

increase fan speed.

Check rotation of blower, thermostat heat anticipator set-

tings, and temperature rise of unit. Adjust as needed.

Adjust minimum position.

Check economizer operation.

Check all screws around flue outlets and burner com-

)artment. Tighten as necessary.

Cracked heat exchanger.

Overtired unit -- reduce input, change orifices, or adjust

as line or manifold pressure.

Check vent for restriction. Clean as necessary.

Check orifice to burner alignment.

Wait until mandatory one minute time period has

elapsed or power to unit.

Table 29 -- MoistureMiSer TM Dehumidification Subcooler Service Analysis

PROBLEM CAUSE REMEDY

Subcooler Will Not Energize No power to subcooler control transformer. Check power source. Ensure all wire connections

are tight.

No power from subcooler control transformer to 1. Fuse open; check fuse. Ensure continuity of wiring.

liquid line three-way valve. 2. Subceoler control low-pressure switch open.

Cycle unit off and allow low-pressure switch

to reset. Replace switch if it will not close.

3. Transformer bad; check transformer.

Liquid line three-way valve will not operate. 1. Solenoid coil defective; replace.

2. Solenoid valve stuck closed; replace.

Subcooler Will Not Deenergize Liquid Line three-way valve will not close. Valve is stuck open; replace.

Low System Capacity Low refrigerant charge or frosted coil. 1. Check charge amount. See system charging

section.

2. Evaporator coil frosted; check and replace

subcooler control low-pressure switch if necessary.

Table 30 -- EconoMi$erlV Input/Output Logic

Demand Control

Ventilation (DCV)

Below set

(DCV LED Off)

Above set

(DCV LED On)

INPUTS

Enthalpy* Compressor

Outdoor Return Y1 Y2 Stage Stage

1 2

High Low On On On On

(Free Cooling LED Off) On Off On Off

Off Off Off Off

Low High On On On Off

(Free Cooling LED On) On Off Off Off

Off Off Off Off

High Low On On On On

(Free Cooling LED Off) On Off On Off

Off Off Off Off

Low High On On On Off

(Free Cooling LED On) On Off Off Off

Off Off Off Off

OUTPUTS

NTerminalt

Occupied

Minimum position

Modulating** (between min.

position and full-open)

Minimum position

Modulating1-1- (between min.

position and DCV maximum)

Modulating***

Unoccupied

Dam )er

Closed

Modulating** (between

closed and full-open)

Closed

Modulatingtl- (between

closed and DCV

maximum)

Modulatingtl-t

*For single enthalpy control, the module compares outdoor

enthalpy to the ABCD set point.

tPower at N terminal determines Occupied/Unoccupied setting:

24 vac (Occupied), no power (Unoccupied).

**Modulation is based on the supply air sensor signal.

1-1-Modulation is based on the DCV signal.

***Modulation is based on the greater of DCV and supply-air sen-

sor signals, between minimum position and either maximum

position (DCV) or fully open (supply-air signal).

1-tl-Modulation is based on the greater of DCV and supply-air

sensor signals, between closed and either maximum position

(DCV) or fully open (supply-air signal).

Ii _ - INOO(O FAN DELAY _I--(HEATrNG)

I 2 R._S __ _ UMrr

_TES _ WITH

_O_D GAS VALVE

CYCLED 4 _S ON SINGLE

MOTOR FAULT

Owo slgnalfrom _'w_,H_I Effect

,_ toteo se(:on¢_)

I7_S -OPENIF_ OF

ROt.LOUT 9AqTCH

I 8 FLASI-IES -_ (:_ I_ _

FALI.T

I9FLASHES - SOFTWARELOCKOUT Ii-

HEA'nNG

I'Wl' FROM BASE CONTROL BOARD ENERGIZES 'W' I

ON IGC - 1 MINUTE LOCK-ON

I _ RELAY ON IGC B E_ I

IGC S_ LOGIC V_ILL SHUT

OFF GAS VALVE AND SPARK

I20 _K;OND PDRGE OF HEAT

EXCHANGER

Yes

I IGNITION LOCKOLrr I

(5 RASheS OF LED) j

LEGEND

IGC -- Integrated Gas Unit Controller

NOTE: Thermostat Fan Switch in the "AUTO"

position.

I Y"

IAFllSR 45 SECONDS (OR LE_ IF THE TIMING I

HAS BEEN REDUCED DUE TO UM_ SWffCH

TRIPS) IGC WILL _BLOhlBR RELAY

_ING _ SA_

_STOPS, SAP-ETY LOGIC SHUI_ OFF GAS VALVE

(DBJ_Y EXI_ BY 5 _FOR _ UMIT _/£qlCH TRIP -

MAXIMUM DELAY: 3 MINLrFEs)

Fig. 59 -- IGC Control (Heating and Cooling)

SU_ 5 SECONDS (OR

ANOI]-IE_ 5 SL=CONDS) FROM

INDOOR FAN ON TIME I:t_AY

Fig. 60 -- EconoMiSerlV Functional View

Air quality limits 40

Altitude compensation 12

Burner section 12

Burner spark gap 47

Carrier Comtbrt Networked) 19

Charging chart, refrigerant 45

Clearance 6-8

CO2 sensor

Configuration 30

Settings 29,30

Combustion blower wheel 43

Compressor

Lockout 25,46

Lubrication 43

Mounting 33

Rotation 33

Concentric duct 11

Condensate drain

Cleaning 43

Location 11,12

Condenser coil 9

Cleaning 43

Condenser fan 9

Adjustment 45

Control circuit 46

Wiring 13

Convenience outlet 14

Crankcase heater 33,46

Demand control ventilation 28

Dehunfidification 30

Dimensions 3,4, 6-8'

Ductwork 11

EconoMiSerlV 24-.¢0

Control mode 27

Controller wiring 26

Damper movement 28

Demand ventilation control 28

Troubleshooting 51,.52,.54

Usage 27

Wiring 26

EconoMiSer2 24-26

Electrical connections 13

Electrical data 15

Enthalpy changeover set points 29

Error codes 4Z .5.5

Evaporator coil O

Cleaning 43

Ewtporator fun motor

Efficiency 40

Lubrication 44

Motor data 40

Pertbrmance 34-39

Pulley adjustment 44

Pulley setting 9, 40

Speed O

Filter

Cleaning 43

Size 10

Filter drier 4_

Flue collector box 43

Flue gas passageways 43

Flue hood 11

Freeze protection thermostat 10,46

Gas connection 10

Gas input 10

Gas piping 13,33

Gas pressure 1, 10

Heat anticipator settings 10, 13

High-pressure switch 10,46

Hinged access doors 47

Horizontal adapter roof curb 2

Humidistat 31

Indoor air quality sensor 19

Integrated gas controller

Error codes 55

Liquid propane 10, 12

Lx_w-pressureswitch 10, 46

Main burners 43,46

INDEX

Manual outdoor air damper 16

MoistureMiSer dehumidification

package 31, .¢2,45, 53

MotorMaster® I control 17

Motonnaster V control 18

Mounting

Compressor .¢3

Unit 2

Natural gas 10

Non-fused disconnect 14

Operating limits 18

Operating sequence 41-43

Cooling 41-43

EconoMiSerlV 41

EconoMi$er2 with

PmmierLink control 41-43

Heating 41-4.€

Outdoor air hood 16

Outdoor air temperature sensor 19,25

Outdoor air inlet screens

Cleaning 43

Dimensions 10

Physical data O,10

Power supply 13

Wiring 13

PremierLink controls 19-22

Pressure, drop

EconoMiSerlV 40

MoistureMi$er 40

Pressure switches

High pressure 10

Low pressure 10

Refrigerant

ChaNe 45

Type O

Refrigerant selwice ports .¢3

Replacement parts 46

Return air filter 10,33

Returu air temperature sensor 27

Rigging unit 2,5

Roof curb

Assembly 2

Dimensions 3,4

Leveling tolerances 2-4

Safety considerations 1

Sew,ice 43-50

Serqce ports 33

Start-rip 33-43

Start-rip checklist CL-1

Supply-air temperature sensor 19,25

Thermostat 14,28

Troubleshooting 51-.%

Weight

Corner 6-8

EconoMiSerlV 6-9

Maximum 5

MoistnreMi$er 9

Unit 6-9

Wind baffle 11,1Z 18

Wiring

4 to 20 mA control 24

EconoMi$erlV 26

EconoMi$er2 26

Humidistat 31

Power connections 13

PremierLink 20

Thermostat 14

Unit 48, 49

SERVICE TRAINING

Packaged Service Training programs _ue an excellent way to increase your knowledge of the equipment

discussed in this manual, including:

•Unit Familitu'ization

•Installation Overview

•Maintenance

• Operating Sequence

A large selection of product, theory, and skills programs am available, using popular video-based formats

and materials. All include video and/or slides, plus companion book.

Classroom Service Training which includes "hands-on" experience with the products in our labs can

mean increased confidence that really pays dividends in faster troubleshooting and fewer callbacks. Course

descriptions and schedules ale in our catalog.

CALL FOR FREE CATALOG 1-800-644-5544

[ ] Packaged Service Training [ ] Classroom Service Training

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480016-01 Printed in U.S.A. Form 48TM-4SI Pg 58 3-06 Replaces: 48TM-3SI

START-UP CHECKLIST

MODEL NO.: SERIAL NO.:

DATE: TECHNICIAN:

PRE-START-UP

[] VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

[] VERIFY INSTALLATION OF INDOOR FAN MOTOR ADJUSTMENT BOLT AND PLATE

[] VERIFY INSTALLATION OF OUTDOOR-AIR HOOD

[] VERIFY INSTALLATION OF FLUE HOOD AND WIND BAFFLE

[] VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

[] VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

[] CHECK GAS PIPING FOR LEAKS

[] CHECK THAT FILTERS AND SCREENS ARE CLEAN AND IN PLACE

[] VERIFY THAT UNIT IS LEVEL

[] CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREW

IS TIGHT

[] VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

[] VERIFY THAT SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION

[] VERIFY THAT CRANKCASE HEATER HAS BEEN ENERGIZED FOR 24 HOURS

START-UP

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS -- COMPRESSOR NO. 1

COMPRESSOR NO. 2

SUPPLY FAN AMPS

LI-L2 L2-L3 L3-LI

LI L2 L3

EXHAUST FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

GAS HEAT SUPPLY AIR

F DB (Dry-Bulb)

F DB

F WB (Wet-Bulb)

PRESSURES

GAS INLET PRESSURE IN. WG

GAS MANIFOLf) PRESSURE STAGE NO. 1 IN. WG

REFRIGERANT SUCTION CIRCUIT NO. 1 PSIG

REFRIGERANT DISCHARGE CIRCUIT NO. 1 PSIG

STAGE NO. 2 IN. WG

CIRCUIT NO. 2 PSIG

[] VERIFY REFRIGERANT CHARGE USING CHARGING CHART ON PAGE 45.

GENERAL

[] ECONOMIZERMINIMUMVENTAND CHANGEOVERSETTINGSTOJOB REQUIREMENTS

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 14 Catalog No. 04-53480016-01 Printed in U.S,A, Form 48TM-4SI Pg CL-1 3-06 Replaces: 48TM-3SI

Tab 1a 16a

I--

I-

I--

I-

CARRIER Package Units(both Units Combined) Manual L0606342

48TM016-028 L0606342

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