CARRIER Package Units(both Units Combined) Manual L0606347

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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Page Count: 48

50TM016-028

Single-Package Rooftop Units

Electric Cooling with Electric Heat Option

Installation, Start-Up and

Service Instructions

CONTENTS

Page

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

INSTALLATION .................................. 1-29

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

• ROOF CURB

• ALTERNATE UNIT SUPPORT

Step 2 -- Rig and Place Unit ......................... 4

• POSITIONING

• ROOF MOUNT

Step 3 -- Field Fabricate Ductwork .................. 9

Step 4 -- Make Unit Duct Connections .............. 9

Step 5 -- Trap Condensate Drain .................... 9

Step 6 -- Make Electrical Connections ............. 10

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• OPTIONALNON-FUSED DISCONNECT

• OPTIONAL CONVENIENCE OUTLET

Step 7 -- Make Outdoor-Air Inlet

Adjustments ........................................ 13

• MANUAL OUTDOOR-AIR DAMPER

Step 8 -- Install Outdoor-Air Hood .................. 13

Step 9 -- Install All Accessories .................... 14

• MOTORMASTER® I CONTROL INSTALLATION

• MOTORMASTER V CONTROL INSTALLATION

Step 10 -- Adjust Factory-Installed Options ........ 16

• PREMIERLINK IMCONTROL

• ENTHALPY SWITCH/RECEIVER

• OUTDOOR ENTHALPY CONTROL

• DIFFERENTIAL ENTHALPY CONTROL

• ENTHALPY SENSORS AND CONTROL

• OPTIONAL ECONOMI$ERIV AND ECONOMI$ER2

• ECONOMI$ERIV STANDARD SENSORS

• ECONOMI$ERIV CONTROL MODES

Step 11 --Install Humidistat for

Optional MoistureMi$er TM Package .............. 28

START-UP ....................................... 30-36

SERVICE ........................................ 37-42

TROUBLESHOOTING ............................ 43-45

INDEX .............................................. 46

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

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, observe 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.

IIMPORTANT: Units have high ambient operating limits. If I

limits are exceeded, the unit will automatically lock the I

compressor out of operation. Manual reset will be required

to restart the compressor:

INSTALLATION

Step 1-- Provide Unit Support

ROOF CURB -- Asselnble and install accessory roof curb or

horizontal a&tpter roof curb in accordance with instructions

shipped with the curb or horizontal adapter Accessory roof

curb and horizontal adapter roof curb and information required

to field fabricate a roof curb or horizontal adapter roof curb are

shown in Fig. IA-2. Install insulation, cant strips, roofing, and

counter flashing as shown. Ductwork can be secured to roof

curb before unit is set in place.

IMPORTANT: The gasketing of the unit to the roof curb or

adapter roof curb is critical for a leak-proof seal. Install

gasket supplied with the roof curb or adapter roof curb as

shown in Fig. IA and lB. hnpropefly applied gasket can

result in air leaks and poor unit performance.

SAFETY CONSIDERATIONS

Installation and servicing air-conditioning equipment can be

hazardous due to system pressure and electrical components.

Only trained and qualified service personnel should install,

repair, or service air-conditioning equipment.

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

Catalog No. 04-53500009-01 Printed in U.S.A, Form 5OTM-4SI Pg 1 4-06 Replaces: 50TM-3SI

_K o _EF sc_ _I ON

_1 !kbi

CR7 CU/BO!OAO0 2 - STANDARD14.HIGHCURB

{305}

c,_rr ,so AO 2 o uNf '_ECX'/N

o0, I'G INBTDL L DTION

C bgB('zO_ 2{" _r _.....

". ",/ lIE IU _N vkl/b

[s o, J C INS All ATIOq

E" 2 3/ 6"

(i885) i

(REF SUPPLY OPEhiNG) _

G'I/4 _ _ _ i

5/.i/2"" PLA\ V[EW 01: ROOf: CURB

Z7!7 _ .... T *,, o cN

S i>P v RE RN i '

(0' :_ .... i

*JE CURB

75)

' I

................. ] ................ i

NOTE =

i. ROOF CUR[ ACC[ _,SOR' ]5 71[>P[D D[S_ [f_{_LED.

P. INSULATED PDNELS_ I _ THICK NEOPRENE COATED i¸¸I/2 LB DENSITY

3. I}IMFNS[ONS IN ( } ARE /N _1ill ]HETERS.

4 c::_ {}IRE(}I {Of,, OF AiR iLOt_

5. ROOFCURB_ /6 GA. (VA03 $6) 91L.

B. A 90 DEGREE ELBOW MUST BE INSTALLED ON THE SUPPLY DUCT

WORK BELOW THE UNIT OIBCHARBE FOR UNITB EQUIPPED WITH ,

ELECTRIC HEATERS.

\OE:

T) PR:V{ \T I{ I#ZAR} "c_ :r "N N i/*r *......

BULB UP IN E DR/,IN PAN O IE NDOOR

;C ON, ,,q T CAI 0/v B[ 1TCqE{) #5 WtOWii.

, ..................... {

i ONOTN{ ER J

ANO i

i COM RFS{ (}R i

]....... 7

3 I'IENI]ONS (degree or/d rchet}

($I}

NOH. /4<" X 4 _ \

(32) X (102) \_

IYP< /- P_C9

O" i

(44)

(310) (_78)

3/4" ,NSULA[{ PAN[L :OR !I[}E

/UPPIY AND RETLRN

(CRRFCUR_O12AO0 ONLY)

/ I/4 ° I

TABI E

....O" 3"

(76)

Ub, l l {7\E{ iNG 0 _AI °'c :'

• -o,i odg of mnf Lo *_),- o,'toL,

GASKET

(SUPPL {£O ]Tk CURB)

OUOT ......

FIELO SUI>I>I /E} (IANJ $i_1 )

!(F ! E_9 SUPPL ] ED)

R]GD NSUL AT[ON

(FEID SLRPL B)

Fig. 1A iRoof Curb Details i50TM016-025

,..,J

ROOFCURB I CURB I DESCRIPTION i

ACCESSORY IHEIGHT] d

ROD,co,o]CR,,CUROO AO01,"HIOH __._ ,, m

a_i,

13/ _,,i

_<3;D:

i5 1/16 i

(226_)

i L3/161

i (31o):

KEP ] S AREA CLEAR I))R I

(GAS NTRY FOR GAS IRFD F

NOTES:

1, RGOFCURB ACCESSORY IS SHIPPES OISASSEMBLED.

2. SIWENSIONS IN (I ARE IN NILLIWETENS.

..........F'--I

2 1/41_ I

(886} i

!IN RF SUPPLY OR NIRB _

ii -

ii •

INSULA- ED _ANE

_Ui_pLV OP N_'[x,G C Ui_B ii l

INSULATED PANEL

tRE IURN OPENI G

IiCURB

(132/

1O"

DIMENSIONS {DEGREES AND INCHES1

A B

UNIT DEC. IN. DEC. IN.

ALL .28 .45 .28 .43

MAX CURB LEVELING TOLERANCES:

FROM EDGE OF UNIT TO HORIZONTAL

1 7 i3/6"

(504)

: ii_D79}

PLAN VIEW OF ROOR CUR8

:_--OUTLiN[ OF UNIT

CON_ RSATE DRAN

3. [_DIRECTION OF AIRFLOW,

4, ROOF CURS: IS SA, (VAO3-5S} STEEL.

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

OF THE INOOOR SECTION. UNIT CAN ONLY BE PITCHES AS SHOWN,

6. INSULATED PANELS: T" THICN NEOPRENE COATED I-T/2 LB DENSITY.

7, A9_ ELBOW MUST BE INSTALLED ON THE SUPPLY DUCT WORE BELOW

THE UNIT DISCHARGE FOR UNITS [OUIPPES WITH ELECTRIC HEATERS,

TOP ONLY

_ D

i 7 51/!0"

LNOM S/4': X 4: TYP 4 PLACES

_EIBHI FROM TABLE

ATTACH DUCT WORK T i JRTTS (SUPPLIED WITH

COUNTER FLASH( NS

(FIELD SUPPLIEOI

NOOF I NG FELT

SUPP Dt]C_T-LIEU (FIELD SUPPLIED)

FIELD CANT STRIP

(PIELO SUPPLIED}

----_\ " _ IELD SUPPLIESI

12 F_'"T'S'u" _ _ ........150'1) F(';I'IS 5/18'

(4419/18' L RIGID INSULATION

SUPPLY RETURN _' (FIELD SUPPLIES)

_OPT ]ONAL

RETURN

j,,,:

su,;

£a_ SECTION A'A _!/J

Fig. 1B -- Roof Curb Details -- 50TM028

25% VENT AIR/ /

ECONOMIZER --_/

HOOD _._

BLOCK-OFFAl__ l

PAN

HORIZONTAL SUPPI

Y" TRANSITION DUCT

CURB (CRRFCURB013A00)

14-3/4"

NOTE: CRRFCURB013A00 is a fully factory preassembled

horizontal adapter and includes an insulated transition duct,

The pressure drop through the adapter curb is negligible,

For Horizontal return applications: The power exhaust and

barometric relief dampers must be installed in the return air

duct,

FULLY INSULATED

SUPPLY PLENUM

31_ _ _ 2"uXI'_R T TYP. /_ I"ll/NSUDLEATIsITNy,

I ] /STITCH WELDED/STICK PINNED & GLUED

143/4"1 i 23

12" WIDE STANDING

SEAM PANELS

ACCESSORY CURB DESCRIPTION

PACKAGE NO. HEIGHT

1'-11" Pre-Assembled Horizontal

CRRFCURB013A00 (584) Adapter Roof Curb

Fig. 2 -- Horizontal Supply/Return Adapter Installation (016-025 Only)

Curb or adapter roof curb should be level. This is necessary

to permit unit &'ain to function properly. Unit leveling toler-

ance is + 1/16 in. per linear ft in any direction. Refer to Accesso-

ry Roof Curb or Horizont_d Adapter Roof Curb Installation

Instructions for additional information as required. /

ALTERNATE UNIT SUPPORT -- When the curb or adapter .__

cannot be used, support unit with sleepers using unit curb or

adapter 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--Inspect unit for SEE

transportation &mmge. File any chfim with transpom_tion DETAILA"

agency. Keep unit upright, and do not drop. Use spleader bm_

over unit to prevent sling or cable damage. Rollers may be used UNIT

to move unit across a roof. Level by using unit frmne as a refer- 50TM

ence; leveling tolerance is + I/v, in. per line;u ft in any direc-

tion. See Fig. 3 for additional information. Unit weight is

shown in Table 1.

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

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

POSITIONING -- Provide clearance around and above unit

for airflow, safety, and service access (Fig. 4-6).

Do not insUdl unit in an indoor location. Do not locate air in-

lets near exhaust vents or other sources of contaminated _fil:

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

ROOF MOUNT -- Check building codes for weight distribu-

tion requirements.

10'-0"

(3048)

,SPREADER BARS "DETAIL A"

RIGGING HOOK

3'-7 1/2"

(t to51

UNIT BASE RAIL

016

020

025

028

NOTES:

1. Dimensions in (

MAXIMUM

SHIPPING WEIGHT

Lb Kg

1725 782

1785 810

1905 864

2255 1023

DIMENSIONS

A B

Ft-in. mm R-in. mm

6-111_ 2121 4- 0 1219

6-111_ 2121 3-10 1168

6-111_ 2121 3- 7 1092

6-111_ 2121 3- 5 1041

) 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.

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

economizer weight. See Table 1 for MoistureMi$er TM dehumidifi-

cation package weight.

6. Weights given are for aluminum evaporator and condenser coil

plate fins.

All panels must be in place when rigging.

Fig. 3-- Rigging Details

{274}

0UTDGOR /_ I} DK.0.

COIL /

/s1_ J

(' NI:R C /-"

...... g 3/8" { A COND NTR C K0/

((} (3!

::ss _f

G' 4_

9. A 90 DEGREE ELBOW MUST BE INSTALLED ON THE SUPPLY DUCTWORK BELOW

THE UNIT DISCHARGE FOR UNITS EOUIPPEO WITH ELECTRIC HEATERS

/3__7/8 ©]_\ D©NCENTR}C _.O.

{5/)

'_3/4 _ £PT DRA]N CONNECTION

{27) FAR SiDE @4i Y

(3_0} (1676)

Fig. 4 -- Base Unit Dimensions i50TM016,020

S CT] ON A a

Fig. 5 JBase Unit Dimensions J50TM025

-q

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<P21' / / "Am i L,E_GHr / _,E_G,:T [ A i _ I C i C i .......... / i

(2O,

i i .... _-_j i ..... ........ | _ :\ j ',, _ .50 i) A I01{ 1 R f i P S 0 R : RB AC RY S N [ N

J ] i | "_ YPCA[ 2 DISEN510 9 F. ( ) ArCE N H LL IETER8.

, _ .... ;//d ,,/, p>

].. , i " 5 DC _ORK ]0 8E /rTt_C ED ]0 DCCE5807_ _OOf CURS ONL ,

_. _ B _2' 6 IS/SB%q IICAL 4 COINE45 6 bllN MUhl C ESbtNOE

(788 , i REAR 70" (21 ]4) FOR C)i R MO'_A F 0 HEN N }AN B

_ _ RIDUCi ) 0 4"0" (129) COND J ONE Pqb I COil bO_AI

i .....................1 _ IP,O EOR.i _ Y LET SIDE: 4"0 _ (i219} FOR PROPER CONDEN5 R CO}L A{A FLOI,.

i _ i 0"7 FRONT: 4"0" (1219) OR CONTRO BOX 4CCESS,

i _ ._ _76 RC'C" 2 ) :0_ PROPER O)RZ_ ON OF

AETUY_N i I (" _ {sSM)E AN _ )OWE EXHAUST IF 50 OU P)ED,

5- e L_ j / o> 8,o ° (189) io ASS /E >RO>R CON) NSER FAh, O>ERAI ON

O" 4 _ LOCAl CO{)S 0 J; !)C /8N SAY PR[_A ,

| - 59" | | /(1C2 ,x M!ll lie EXC PT ON OF C ARANC [0 q CON[)[ £{R COl

[ &N) H{ [}A,NRiR/R()W[IR EXiqAU AS $ AIEi) IN NOI _B, A

: _ .....,/<3 <q _-

s2REIO/ABLE FENCE OR BARR CDDE RE© AEE NO CLEARANCE

J _ I j ' 2 //8' • m s 8 DISENS]ON5 4RE FROb 0 TS]DE OF CORI, ER :_05 ,

,,,,,,, . . /,L OW 0' 5/ I/ (!) Oq ELCi /[): OR 0 CO_ER ID8 .

707) LV i l k ,_"-_ l l (2182) :! CT O_ ,- A 9. & 0 i)EGR [ BO_ bIU i i qfl_\ LI! )N /l[ XJi> DUO/WORK 8 (X,

IH[ N I I)[ ItAA([ FOR UN l! QLJIPP[I) ,, ['E( R}( [A/ R

X 2' 2 /)8"1 _-L

, i i 862) i "_.

l i l ""iPO_ ER EX A8 T

\_ i o',/c, _Rv w

i ...... ...... i

0'1 1/8"

Z O' 7_/4: {:} { /

l (i97 ' /8"

n' . , -F_B@_Y C""_ 3" 7/8 )]A CONCENTRIC KO, (/}

1 3,1o _ (02, /",

/' (78) 8 ( ) (iE{)>OWE_)

.2/4) " l} A K.O _ _" O" S" _7/8 _ DIA IOLE ,.- .....

( ) 0<s_d ;_ (2) _ (2) 0

3" 8 sis" ." :, CO,,C:N< c _ o /(1 _3 ,_ _,o" /_ sl ] _,, . :,8 o _ ;'

{2() (3) i : 0 _) "3" ! ,/' 1 ] ) OONOMIZER 0 N NO L 0"£4 /B ---

........................................................................................................................... -: ........................... _r)'( {}8 /8: ........................................................................................... ...._CON[ _0.... X 0" 17 ; /{ _ } // •/' 7" *'1 /i (471[g)

T-/s _ .v78 1 i{///' ./ (,_{7) 1 " .... 4"

@_ I ir R /c.c ..... .:.7 2, ,_ R . // 5_. O/t_PER OPENING i1 'i_3_ ' ".'ZEta, Z Z

"/\ c:_'5 Dr 5"IO 8/IS _/cO0+iZER oo) i i

.......... /, {,, , Or,, E _ [ XIiAU

_, /i F:;;..................................... ] ..................:ff , 4 l (_ C SSORYONY)

,/ h" /17" I/......................................................................... i 1" { :_/4 _

i (3:87

©" 8 7/1_" ///i ............................................................................] -;i 71

4"41/4

(228)

X)RNER "0" ,

FAR SIDE °9"

.... [N{)OOR 0011 (I02) O" 3 ?/8:'_ _- (22) _1 i/4 _ Olt_ OLi

O" • '8" _ t

(99) ', --AL RNA E RE U2\ (_}) (2)

T'_ (4) _LC5 ' 2" TYP " 3/4 _ )RAIN CONNIC ON •"/6"_

:; (27) FAR 91) ONY (310 L_ 5' 6

(S]) (1 78)

Fig. 6 iBase Unit Dimensions i50TM028

Table1 -- Physical Data

UNIT 50TM 016 020 025 028

NOMINAL CAPACITY (tone) 15 16 20 25

OPERATING WEIGHT (Ib) 1650 1710 1770 2120

Economizer 90 90 90 90

MoistureMi$er TM Dehumidification Package 40 40 40 40

COMPRESSOR/MANUFACTURER Scroll, Copeland

Quantity..,Model (Ckt 1, Ckt 2) 1_.ZR94KC, 1...ZRIOSKC, I 1._ZR125KC, 1_.ZRU140KC,*

1..,ZR72KC 1,_ZR94KC 1._ZR108KC 1_.ZR144KC

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

Number of Refrigerant Circuits 2 2 2 2

Oil (oz) (Ckt 1, Ckt 2) 85, 60 106, 81 106,106 136, 106

REFRIGERANT TYPE R-22

Expansion Device TXV

Operating Charge (Ib-oz)

c,rcuittt 19-6 I 19-6 I 18-11I 26-13Circuit 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,..Fins/in, 4...15 I 4_.15 I 4_.15 I 3_,15 (2 coils)

Total Face Area (sq ft) 21,7 21,7 21.7 43.4

CONDENSER FAN Propeller Type

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

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

Motor Hp,.,Rpm V2_.1050 V2...1050 1,,,1075 V2...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_.15 I 4._15

17.5 17,5 17.5 17,5

Centrifugal Type

2,,,12 x 12 2.,,12 x 12 2,.,12 x 12

Rows,..Finslin,

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 Low-Medium Static

Belt

6000

1745

6.13

184T

873-1021

Belt

7200

1745

5.90

184T

910-1095

Belt

8000

7.5

1745

8.7 [208/230, 575 v]

9,5 [460 v]

213T

1002-1151

Motor Bearing Type

Maximum Allowable Rpm

Motor Pulley Pitch Diameter

Min/Max (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)

High Static

Low-Medium Static

High Static

Low-Medium Static

High Static

Low-Medium Static

High Static

Low-Medium Static

High Static

Low-Medium Static

High Static

1025-1200

Ball

1550

4.9/5,9

1_&

9,4

8,0

17/16

1,,,BX...50

1,,,BX...48

13.3-14.8

6**

3,5

965

1134

17/16

1069-1287

Ball

1550

4,9/5.9

11/8

9.4

8.0

17/16

1..,BX,..50

1._BX,.,48

13.3-14.8

6tt

3.5

1002

1178

17/16

1193-1369

Ball

1550

5.4/6.6

13/8

9.4

7.9

17/16

1._BX_.53

1_.BX._50

14.6-15.4

6**

3.5

1095

1303

17/16

2,.,12 x 12

Belt

10,000

1740

10.2 [208/230, 575 v]

11,8 [460 v]

215T

1066-1283

1332-1550

Ball

1550

4.9/5,9

13/8

8,0

6.4

17/16

2,..BX-,50

2,.,BX-,47

14.6-15,4

6tt

3.5

1182

1470

17/16

Fan Shaft Diameter at Pulley (in.)

HIGH-PRESSURE SWITCH (psig)

Cutout 426

Reset (Auto) 320

LOW-PRESSURE SWITCH (psig)

Cutout 27

Reset (Auto) 44

FREEZE PROTECTION THERMOSTAT (F)

Opens 30 _+5

Closes 45 _+5

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity,.,Size (in,) 2...20 x 25 x 1

1,,.20 x 20 x 1

RETURN-AIR FILTERS Throwaway***

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

4._16 x20 x2

POWER EXHAUST V2 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),

tCircuit 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 11/2turns open,

tl-Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be

set to 0 to V2 turns open,

***The 50TM028 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 50TM016-028 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

insulated and covered with a vapor barriel:

The 50TM units with electric heat require a l-in. clearance

for the first 24 in. of ductwork.

Outlet grilles must not lie directly below unit disch_u'ge.

NOTE: A 90-degree elbow must be provided in the ductwork

to comply with UL (Underwriters Laboratories) codes for use

with electric heat.

For vertical supply and leturn units, tools or pmls could

diop into ductwork and cause an injury. Inst_dl a 90-degree

turn in the return ductwork between the unit and the condi-

tioned space. If a 90-degree elbow cannot be installed, then

a grille of sufficient strength and density should be installed

to prevent objects from falling into the conditioned space.

Due to electric heatel: supply duct will require 90-degree

elbow.

EVAPORATOR-

FAN MOTOR

NOTE

LV! OUT

NOTE: Do notdrillinthisarea;damage tobasepanmay resultin

water leak.

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

NOTE

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

Step 4 -- Make Unit Duct Connections -- Unit

is shipped for through-the-bottom duct connections. Ductwork

openings tue shown in Fig. 7. Field-fabricated concentric duct-

work may be connected as shown in Fig. 8 and 9. Attach all

ductwork to roof curb and roof curb basepans. Refer to installa-

tion instructions shipped with accessory roof curb for mole

information.

Step 5-- Trap Condensate Drain -- See Fig. 4-6

trod 10 for di'ain location. Plug is provided in drain hole and

must be removed when unit is operating. One :V4-in. half-

coupling is provided inside unit evaporator section for conden-

sate drain connection. An 81/2 in. x :V4-in. diameter nipple and a

2-in. x :V4-in. diameter pipe nipple are coupled to standard

3/4-in. diameter elbows to provide a straight path down through

holes in unit base rails (see Fig. 11). A trap at least 4-in. deep

must be used.

BAFFLE

Shaded area indicates block-off panels.

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

ceiling diffuser.

Fig. 9 -- Concentric Duct Details

\\\\

\\\

\\\\\\\

\\\\\

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

CONNECTION DRAIN HOLES

Fig. 10- Condensate Drain Details

(50TM016,020 Shown)

3/4" PPT /2-IN, (FIELD-SUPPLIED)

DRAIN CONNECTION /

/HALF ]_

,e 3"

BASE RAIL _-__._

81/2-1N. (FIELD- _---'=

SUPPLIED) NIPPLE

NIPPLE

Fig. 11 -- Condensate Drain Piping Details

Step 6-- Make Electrical Connections

FIELD POWER SUPPLY -- Unit is factory wired for volt-

age shown on nameplate.

When installing units, provide a disconnect, per NEC

(National Electrical Code) requirements, of adequate size

(Table 2).

All field wMng must comply with NEC and loc:d

requirements.

Route power lines through control box access panel or unit

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

gram and Fig. 12.

Operating voltage to compressor must be within voltage

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

between phases must be balanced within 2% and the current

must be b_danced within 10%.

The correct power phasing is critical in the operation of the

scroll compressors. An incorrect phasing will cause the

compressor to rotate in the wrong direction. This may lead

to plemature complessor failure.

Use the following formula to determine the percentage of

voltage imbalance.

Percentage of Voltage Imbalance

= 100 x max voltage deviation fiom average voltage

average voltage

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

AB C

BC = 464 v

AC = 455 v

Average Voltage = 455 + 464 + 455

1371

= 457

Determine maximum deviation from average voltage:

(AB) 457 - 452 = 5 v

(BC) 464 - 457 = 7 v

(AC) 457 - 455 = 2 v

Maximum deviation is 7 v.

Determine percent voltage imbalance:

Percentage of Voltage [mbalance = 100 x- 7

457

= 1.53%

This amount of phase imbalance is satisfacto Uas it is

below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately.

Unit failure as a result of operation on improper line voltage

or excessive phase imbalance constitutes abuse and may cause

damage to electrical components.

FIELD CONTROL WIRING -- Install a Carrier-approved

accessory thermostat assembly according to the installation in-

structions included with the accessory. Locate thermostat

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

age temperature.

Route thermostat cable or equiwdent single leads of no. 18

AWG (American Wire Gage) colored wire from subbase temri-

nals through conduit in unit to low-voltage connections as

shown on unit label wiring diagram and in Fig. 13.

NOTE: For wire runs up to 50 It, use no. 18 AWG insulated

wire (35 Cminimum). For 50 to 75 fi, use no. 16 AWG insu-

lated wire (35 Cminimum). For over 75 It, use no. 14 AWG

insulated wire (35 C minimum). All wire lmger than no. 18

AWG cannot be directly connected to the thermostat and will

require a junction box and splice at the thermostat.

Set heat anticipator settings as indicated in Table 3. Settings

may be changed slightly to provide a greater degree of comfort

for a particular inst_dlation.

----] TBt

z z

o3o.

EQUIP GND

TB1 MAXIMUM WIRE SIZE

UNIT

50TM 208/230 IAll 350 kcmil

LEGEND

EQUIP -- Equipment

GND -- Ground

kcmil -- Thousand Circular Mils

NEC -- National Electrical Code

TB -- Terminal Block

VOLTAGE

460 575

2/0 2/0

Fig. 12- Field Power Wiring Connections

THERMOSTAT ASSEMBLY

JUMPER I

Cl _ Z Z 7-

cc m a_ O _ m m

UNIT LOW-VOLTAGE CONNECTIONS

Fig. 13 -- Field Control Thermostat Wiring

UNIT

50TM

016

020

025

Table 2 -- Electrical Data

VOLTAGE COMPRESSOR OFM IFM

NOMINAL RANGE No, 1 No. 1A No. 2

VOLTAGE FLA

(3 Ph, 60 Hz) Min Max RLA LRA RLA LRA RLA LRA Qty Hp (ea) Hp FLA

208/230 187 253 32.1 195 20.7 156 3 0.5 1.7 5.0 15.8/15.8

460 414 508 16.4 95 10 70 3 0.5 0.8 5.0 7.9

575 518 633 12 80 8.2 54 3 0.5 0.75 5.0 6.0

208/230 187 253 30.1 225 28.8 195 3 0.5 1.7 5.0 15.8/15.8

460 414 508 15.5 114 14.7 95 3 0.8 0.8 5.0 7.9

575 518 632.5 12.1 80 10.8 80 3 0.5 0.8 5.0 6.0

208/230 187 253 42 239 33.6 225 2 1 6.6 7.5 25.0/25.0

460 414 508 19.2 125 17.3 114 2 1 3.3 7.5 13.0

575 518 632.5 13.8 80 13.5 80 2 1.0 3.4 7.5 10.0

POWER ELECTRIC POWER SUPPLY

EXHAUST HEAT*

FLA LRA kW FLA MCA MOCPt

-- 82/ 82 110/110

4.6 18.8 -- -- 86/ 86 110/110

26/34 71/ 82 109/122 110/128

4.6 18.8 26/34 71/ 82 114/128 125/180

42/56 117/135 166/155 175/175

4.6 18.8 42/56 117/135 172/161 178/175

56/75"* 156/180 176/200 200/225

4.6 18.8 56/75"* 156/180 182/206 200/225

-- 41 50

2.3 6.0 -- -- 43 50

32 39 59 60

2.3 6.0 32 39 62 70

55 66 76 90

2.3 6.0 55 66 79 90

80** 96 106 125

2.3 6.0 80** 96 109 125

-- 31 40

2.1 4.8 -- -- 34 40

-- 87/ 87 110/110

4.6 18.8 -- -- 92/ 92 110/110

26/34 71/ 82 109/122 110/125

4.6 18.8 26/34 71/ 82 114/128 125/150

42/56 117/135 166/155 175/175

4.6 18.8 42/56 117/135 172/161 175/175

56/75 156/180 176/200 200/225

4.6 18.8 56/75 156/180 182/206 200/225

-- 44 50

2.3 6.0 -- -- 47 60

32 39 59 60

2.3 6.0 32 39 61 70

55 66 76 90

2.3 6.0 55 66 79 90

80 96 106 125

2.3 6.0 80 96 109 125

-- 34 40

2.1 4.8 -- -- 36 40

-- 124/124 150/150

4.6 18.8 -- -- 129/129 150/150

26/34 71/ 82 124/134 150/150

4.6 18.8 26/34 71/ 82 129/140 180/150

42/56 117/135 178/166 200/175

4.6 18.8 42/56 117/135 183/172 200/175

56/75 156/180 187/211 200/228

4.6 18.8 56/75 156/180 193/217 200/225

-- 61 80

2.3 6 -- -- 63 80

32 39 65 80

2.3 6 32 39 68 80

55 66 82 90

2.3 6 55 66 85 90

80 96 112 125

2.3 6 80 96 115 125

-- 48 60

2.1 4.8 -- -- 50 60

Tab_confinued on next page.

Table 2 -- Electrical Data (cont)

UNIT NOMINAL

50TM VOLTAGE

(3 Ph, 60 Hz)

208/230

028

46O

578

VOLTAGE COMPRESSOR OFM

RANGE No. I No, 1A No, 2

FLA

Min Max RLA LRA RLA LRA RLA LRA Qty Hp (ea)

187 253 20.7 156 20.7 156 47.1 245 6 0.5 1.7

IFM

Hp FLA

10.0 28.0/28.0

POWER ELECTRIC

EXHAUST HEAT*

FLA LRA kW FLA

4.6 18.8 -- --

26/34 71/ 82

4.6 18.8 26/34 71/ 82

42/56 117/135

4.6 18.8 42/56 117/135

56/75 156/180

4.6 18.8 56/75 186/180

POWER SUPPLY

MCA MOCPt

138/138 178/178

143/143 175/178

138/188 178/178

143/143 178/178

181/170 200/175

187/176 200/200

191/215 200/225

197/221 200/225

414 508 10.0 75 10.0 75 19.6 125 6 0.5 0.8

518 622.5 16.4 108 8.2 54 15.8 100 6 0.5 0.8

10.0 14.6

10,0 13,0

2.3 6 -- --

32 39

2.3 6 32 39

55 66

2.3 6 55 66

80 96

2.3 6 80 96

2.1 4.8 -- --

64 8O

66 80

67 80

70 80

84 90

87 100

114 125

117 125

54 60

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

*Heater capacity (kW) is based on heater voltage of 208 v, 240 v and 480 v.

Heaters are rated at 240 v and 480 v. If power distribution voltage to unit var-

ies from rated heater voltage, heater kW will vary accordingly. To determine

heater capacity at actual unit voltage, multiply 240 v or 480 v capacity by

multipliers found in table in Note 4.

tFuse or HACR circuit breaker.

**Electric heaters are field installed.

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. The Canadian

units may be fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is

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

voltage imbalance,

% Voltage Imbalance

= 100 x max voltage deviation from average voltage

average voltage

EXAMPLE: Supply voltage is 480-3-60.

A B C AB = 452 v

(_ BC = 464 v

AC = 455 v

Average Voltage = 452 + 464 + 455

1371

Determine maximum deviation from average voltage.

(AB) 487 -482 = 8 v

(BC) 464 -487 = 7 v

(AC) 487 -488 = 2 v

Maximum deviation is 7 v.

Determine percent voltage imbalance.

% Voltage Imbalance = 100 x 45_

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maxi-

mum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, con-]

tact your oca e ectr cut ty company tamed ate y. J

3. MCA calculation for 50TM016-028 units with electric heaters over 50 kW

= (1.28 x IFM amps) + (1.00 x heater FLA).

4. Use the following table to determine heater capacity at actual voltage.

HEATER ACTUAL HEATER VOLTAGE

RATING

VOLTAGE 200 208 230 240 380 440 460 480

240 0.694 0.781 0.918 1.000

480 0.626 0.840 0.918 1.000

EXAMPLE: 34 kW (at 230 v) heater on 208 v

= 34.0 (.751 mult factor)

= 25.8 kW capacity at 208 v.

LIST_O

=487

Table 3 -- Heat Anticipator Settings

UNIT

50TM

016-028

UNIT kW* STAGE 1

VOLTAGES

208/230-3-60

460-3-60

26/34 .40

42/56 .66

56/75 .66

32 .40

55 .40

80 .66

STAGE 2

.66

.40

.66

.40

.66

*Heater kW is based on heater voltage of 208 v, 240 v or 480 v.

OPTIONAL NON-FUSED DISCONNECT -- On units with

the optional non-fused disconnect, incoming power will be

wired into the disconnect switch. Refer to Fig. 14 for wiling

for 100 and 200 amp disconnect switches. Units with an

MOCP under 100 will use file 100 amp disconnect switch.

Units with an MOCP over 100 will use the 200 amp discon-

nect switch. Refer to the applicable disconnect wiring diagrmn.

To prevent breakage during shipping, file disconnect handle

and shaft are shipped and packaged inside the unit control box.

Install file disconnect handle before unit operation. To install

the handle and shaft, perform the following procedure:

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

shaft fi'om shipping location.

2. Loosen 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. |nsert the disconnect shaft into the square 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 file 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 door.

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 dool:

OPTIONAL CONVENIENCE OUTLET-- On units with

optional convenience outlet, a l15-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.

UNIT WIRING

I00 BLK. YEL. BLU.

AMP

FIELD POWER SUPPLY

UNIT WIRING

6T3 4T2 2T1 LOAD

100_

AMP

5L3 3L2 1L1 LINE

200 BLK. YEL, BLU.

AMP

[ ONITPDWER,

I NON FUSED DISCONNECT

F]ELD POWER SUPPLY

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

wiring diagram label and the component arrangement label.

Fig. 14 -- Optional Non-Fused Disconnect Wiring

Step 7 -- Make Outdoor-Air Inlet Adjustments

MANUAL OUTDOOR-AIR DAMPER -- All units (except

fllose equipped with a factory-inst_dled economizer) have a

manual outdoor-air &lmper to provide ventilation tdl: Dmnper

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

&tmper (Fig. 15).

25% ADJUSTABLE

AIR DAMPER

BASE

UNIT

SECURING SCREWS

Fig. 15 -- 25% Outdoor-Air Section Details

Step 8 -- Install Outdoor-Air Hood -- The same

type of factory-installed hood is used on units with 25% air

ventilation and units with an economizel:

IMPORTANT: If the unit is equipped with the

optional EconoMiSerlV component, move the

outdoor-air temperature sensor prior to installing the

outdoor-air hood. See the Optional EconoMiSerIV and

EconoMiSer2 section for more information.

Personal Injury Hazard. Avoid possible injmN by keep-

ing fingers away [roln dmnper blades.

NOTE: The hood top panel, upper trod lower filter retainers,

hood diain pan, baffle (028), and tilter support bracket are

secured to the unit and shipping skid at the opposite end of the

unit in front of the condenser coil. The screens, hood side pan-

els, remaining section of filter support bracket, seal strip, and

_dl other hardwme are in a package located inside file return-air

tilter access panel (Fig. 16).

1. Attach seal strip to upper filter retainel: See Fig. 17.

2. Assemble hood top panel and side panels, upper filter

retainer, and hood drain pan (Fig. 18).

3. Secure lower tilter retainer and long section of filter sup-

port bracket to unit. See Fig. 18. Leave screws loose on

028 units.

4. Slide baffle (size 028 unit) behind lower filter retainer and

tighten screws.

5. Ix_osen sheet metal screws for base unit top panel 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 thmge between unit top panel flange and unit.

Tighten screws.

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

screws removed in Step 5.

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

ated by lower filter retainer and filter support bracket.

9. Attach remaining short section of filter support bracket.

OUTDOOR-AIR HOOD AND

MOUNTING BRACKETS

FILTER

PACKAGEANE

HOOD

COMPONENTS

ACCESS PANEL

Fig. 16- Outdoor-Air Hood Component Location

PANEL

UPPER FILTER.

RETAINER

HOOD DRAIN

Fig. 17 -- Seal Strip Location

(Air Hood Cross-Sectional View)

Step 9 -- Install All Accessories -- After ;dl the

factory-installed options have been adjusted, install all field-

inst_dled accessories. Refer to the accessory inst_dlation instruc-

tions included with each accessory.

MOTORMASTER® I CONTROL INSTALLATION

(50TM016, 020, and 028 Only)

Install Field-Fabricated Wind Baffles -- Wind baffles must

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

operation at low ambient temperatures. See Fig. 19 for baffle

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

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

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

5/8-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 size 016 and 020 units. Two Motormas-

ter I controls tue required for size 028 units -- one for circuit 1

and one for circuit 2. The Motommster [ control must be used

in conjunction with the Accessory 0° F Ix_w Ambient Kit (pur-

chased separately). The Motormaster I device controls outdoor

fan no. 1 (and 4 on size 028 units) while outdoor fans no. 2 and

3 (and 5 and 6 on size 028 units) are sequenced off by the

Accessory 0° F Low Ambient Kit.

Accessom" 0 °F I_m' Ambient Kit -- Install the Accessory 0° F

Low AmiNent Kit per instruction supplied with accesso%

Sensor Assemb@ -- Install the sensor assembly in the location

shown in Fig. 20.

BAFFLE (028 ONLY)

j/t \

_ LOWER FILTER

//_4 RETAINER

FILTER SUPPORT

BRACKET

HOOD TOP

PANEL

HOOD SIDE

PANELS (2)

BAFFLE

• LOWER

FILTER

RETAINER

FILTER SUPPORT

BRACKET

HOOD DRAIN PAN

UPPER FILTER RETAINER

NOTE: The outdoor-air hood comes with a baffle which is used on

028 units only; discard baffle for 016-025 units.

Fig. 18 -- Outdoor-Air Hood Details

WIND

BAFFLE __

___CROSS BREAK A

BAFFLETOP VIEW 1"(25)MIN---jl

_ 80"+2" ,_^ +50

-0" _z_z-0 )

÷*+-I--

3/4" (19)(TYP)--,,-t _,-

BAFFLE FRONTVIEW

I10" (254)

-- 40"

(1016)

•_10" (254)

- (]yp)

"-'----_1 15" (381)

- 1 (rYp)

1" (25) MIN

NOTE: Dimensions in ( ) are in mm.

Fig. 19 -- Wind Baffle Details

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

ing motor mount with the new motor mount provided with

accessory.

Trarl._fbrmer (460 and 575-v Ulli_ Only) -- On 460 and

575-volt units a transfonner is required. The transformer is

provided with the accessotTand 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.

MOTORMASTER® V CONTROL INSTALLATION

(50TM025 only)

Install Field-Fabricated Wind Baffles -- Wind baffles must

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

operation at low ambient temperatures. See Fig. 19 for baffle

details. Use 20-gage, galwmized sheet metal, or similar corro-

sion-resistant met:d for baffles. Use field-supplied screws to at-

tach baffles to unit. Screws should be I/4-in. diameter and

5&-in.long. Drill required sctew holes for mounting baffles.

To avoid dmnage to the refliget_tnt coils and electric_d com-

ponents, use recommended screw sizes only. Use care

when drilling holes.

Install Motormaster V Controls -- The Motortnaster V con-

trol is a motor speed control device which adjusts condenser

fan motor speed in response to declining liquid refrigetant

pressure. A properly applied Motormaster V control extends

the operating range of air-conditioning systems and permits op-

eration at lower outdoor ambient temperatures.

The minimum ambient temperatures at which the unit will

operate are:

TEMPERATURE OPERATING LIMITS -- F° (C °)

Standard Unit ]Unit with Low Ambient Kit Unit with MMV Control

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

To operate down to the ambient temperatures listed,

Motormaster V controls (Fig. 21) must be added. Field-

fabricated and inst:dled wind baftles are also required for all

units (see Fig. 19). The Motormaster V control permits opera-

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

control regulates the speed of 3-phase fan motot:s that me com-

patible with file control. These motors are factory installed.

See Table 4 for the Motormaster V control accessory pack-

age usage. Table 5 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 requited.

Install the Motormaster V control per instructions supplied

with accessory.

Table 4 -- Motormaster V Control Package Usage

UNIT

50TM025

VOLTAGE

208/230

480

575

ITEM DESCRIPTION

CRLOWAMB015A00

CRLOWAMB016A00

CRLOWAMB017A00

SENSOR

LOCATION

_o°O

_o°

_oo°o

_o°

_oo°o

_o°

_oo°o

_o°

_oo°o

_o°

_oo°o

_o°

€_o°° SENSOR--

_oo LOCAT,ON

_oo°o

_° °

_oo°o

_° °

_oo°o

_°o°

HAIRPIN END

50TM016

m m

SENSOR_ O

_ o LOCATION _0

HAIRPIN END HAIRPIN END

50TM020 50TM028

(CIRCUITS

1 AND 2)

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

bottom.

Fig. 20 -- Motormaster(_) I Sensor Locations

TO PRESSURE

TRANSDUCER

FROMFUSEBLOCK

Table 5 -- Applicable Voltages and Motors

VOLTAGE ] COMPATIBLE MOTOR*

208/230-3-60 I HD52AK654

460-3-60 HD52AK684

575-3-60 HD52GE576

*Motormaster V compatible motors, P/N HD52AK654 for 208/230, 460 v and

P/N HD52GE876 for 878 v, are installed in units with serial numbers 2801F

and later. For units with serial numbers before 2801F, motor changeout is

required prior to installing the Motorrnaster V control package.

TO MOTOR(S)

Fig. 21 -- Motormaster_) VControl

Step 10- Adjust Factory-Installed Options

PREMIERLINK TM CONTROL -- Tile PmmierLink control-

ler is available as a special order from the factory and is

compatible with the Carrier Comfort Network® (CCN)

system. This control is designed to allow users the access and

ability to change factory-defined settings, thus expanding the

function of the standard unit control board. Cmrier's diagnostic

standard tier display tools such as Navigator TM device

or Scrolling Marquee can be used with the PremierLink

controllen

The PremierLink controller (see Fig. 22) requires the use of

a Canier electronic thermostat or a CCN connection for time

bl_)adcast to initiate its interred timeclock. This is necessm-y for

bl_)adcast of time of day functions (occupied/unoccupied). No

sensoLs me supplied with the field-mounted PmmierLink

control The factory-installed PremierLink control includes

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

air temperature (OAT) sensor as stan&trd+ An indoor air quality

(CO2) sensor can be added as an accessory. Refer to Table 6 for

sensor usage. Refer to Fig. 23 for PmmierLink controller

wiring+ The PremierLink control may be mounted in the

control panel or an mea below the control panel.

NOTE: PmmierLink controller version 1.3 and later is shipped

in Sensor mode (for use with space of mtum sensor). If used

with a thermostat, the PremierLink controller must be config-

ured to Thermostat mode.

Install the Supply Air Temperature (SAT) Sensor

NOTE: The sensor must be mounted in the discharge tfirstmam

downstream of the cooling coil and any heating devices. Be

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

heat surfaces.

The SAT sensor is wire-tied inside the unit control box for

shipping. Remove the sensor for installation. Locate a suitable

location on the supply duct beneath the curb for SAT installa-

tion. Drill or punch a I/2-in. hole in the duct. Use two field-

supplied, self-drilling screws to secure the sensor probe in a

horizontal orientation. Route wiring from the sensor through

the unit's control voltage hole in the unit base pan. Connect the

sensor wires to J6 connector's Pin 5 (BRN lead) and Pin 6

(ORN lead) as indicated in Fig. 23.

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

temperature sensor ((-)AT) is factory-supplied and wired. No

adjustment is necessary.

Install the Indoor Air Quality (CO22 Sensor -- Mount the

accessory indoor air quality (COs) sensor according to manu-

facturer specifications. A sepm'ate field-supplied transformer

must be used to power the CO2 sensol:

Wire the CO2 sensor to the COM and IAQI termimds of J5

on the PremierLink controller Refer to the PremierLink Instal-

lation, Start-up, and Configuration Instructions for detailed

wiring and configuration information.

HVAC SENSOR INPUTS

SPACETEMP

SET POINT

SUPPLY AIR TEMP

OUTDOOR TEMP

INDOOR AIR QUALITY

OUTDOOR AIR QUALITY

DUAL MODE SENSOR (STAT)

COMP SAFETY (Y1)

FIRE SHUTDOWN (Y2)

SUPPLY FAN STATUS(W1)

NOT USED (W2)

ENTHALPY STATUS(ENTH) /

O O O

I ....... I

R_ I Pm_NlI,+bm: ItIC_P¢_

i _ +++_I_+i PremzerL_nk _,,=+,,+

im_" _l q ----"

%%:_II ,w+_ =, _7 u==+,+....

I J

] ¢m_ i +s_ + i r4 i

III = I_ ] +IIO_IEN[III 1 1111

.....m<2+++__ ./ ,] _++_m

- +

mm_

"++-++l.Iio +Iqq'l'l+'l'I

m_ .........

omm_

..................... .+J

/ t / f "4 "-4 "-.,

CCN/LEN NAVIGATOR 4+20MA INDOOR COMPR HEAT EXHAUST

PORT PORT ECONOMIZER PANMOTOR 1 &2 LOW/HIGH RVS VALVE

OUTPUTS

Fig. 22 -- PremierLink Controller

Table 6 -- PremierLink TM Sensor Usage

APPLICATION OUTDOOR AIR RETURN AIR OUTDOOR AIR RETURN AIR

TEMPERATURE SENSOR TEMPERATURE SENSOR 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 -- or --

requires 4-20 mA HH57AC077

Actuator)

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

DDCCONTnOL

CMPSAFE

FSD

SFS

NOTUSEn

nMTOCC

TSTATCONTnOL

_TH EFIMELDTAT

_c G

LEGEND

OAT -- Outdoor Air TemperatureSensor

PL -- Plug

PWR -- Power

SAT -- Supply Air TemperatureSensor

TB -- Terminal Block

TRAN -- Transformer

ECONOMIZE_

BOTJ401148

(CnECOMZn010B00)

Fig. 23 -- Typical PremierLink TM Controls Wiring (Thermostat Control Mode)

ENTHALPY SWITCH/RECEIVER -- The accessoly en-

thalpy switch/receiver (33CSENTHSW) senses temperature

and humidity of the air sulTounding the device and c_dculates

the enthalpy when used without an enthalpy sensoc The relay is

energized when enthalpy is high and deenergized when en-

thalpy is low (based on ASHRAE [American Society of Heat-

ing, Refrigeration and Air Conditioning Engineers] 90.1 crite-

ria). [f an accessol yenthalpy sensor (33CSENTSEN) is at-

tached to the return air sensor input, then differential enthalpy is

c_dculated. The relay is energized when the enlhalpy detected by

the return air enthalpy sensor is less than the enth_dpy at the en-

thalpy switch/receivec The relay is deenergized when the en-

thalpy detected by the return air enth_dpy sensor is gleater than

the enlh_dpy at the enthalpy switch/receiver (differential en-

thalpy control). See Fig. 24 and 25.

OUTDOOR ENTHALPY CONTROL (Fig. 26) -- Outdoor

enthalpy control lequires only an enth_dpy switch/receiver

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

the outdoor air inlet and calculates outdoor air enthalpy. The

enthalpy switch/receiver enelgizes the relay output when the

outdoor enthalpy is above 28 BTU/Ib OR dry bulb tempera-

ture is above 75 F and is deenergized when the outdoor

enthalpy is below 27 BTU/Ib AND diy 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 enlhalpy calculation is done using an average _dti-

tude of 1000 ft above sea level.

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

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

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

(National 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 sclews. Insert the screws through the holes in the

sides of the enthalpy switch/receivec

Wiring -- Carrier 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. 26, lhe PlemierLink botud

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

the enlhalpy switchheceiver to lhe terminals on lhe tmnsform-

ec On some applications, the power from the economizer har-

ness can be used to power the enth'.Apy switch/receivec To

power the enthalpy switch/receiver from the economizer har-

ness, connect power of the enthalpy switchheceiver to the led

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

For connection to rooftop units with PremierLink control,

connect the LOW Enthalpy termimfl on lhe enthalpy switch/re-

ceiver to J4 -- pin 2 of the PlemierLink control on the HVAC

unit. The switch can be powered through the PremierLink con-

trol board if desired. Wire the 24 VAC terminal on lhe enthalpy

switchheceiver to J4 -- pin 1 on the PremierLink control. Wire

the GND termin:d on the enthalpy switch/receiver to Jl --

pin 2 on the PremierLink control The HI Enthalpy terminal is

not used. See Fig. 26.

Thermistor FHumidity Sensor Thermistor

S Humidity Sensor

Fig. 24 -- Enthalpy Switch/Receiver Dimensions

(33CSENTHSW) Fig. 25 -- Enthalpy Sensor Dimensions

(33CSENTSEN)

...... .gB_....9.ON... ......

- - - -G_Y--'- _E_ .......

0 0 ¢

__ (OR UNIT GROUND)

T_T_T_ I

_U SPT _O_ {

IPart Nurn_m 33CSPREMLK

I_K _r_ 1 _ c_ei maP_ _i _2 _v pw

*Used with Differential Enthalpy Control only.

Fig. 26 -- Typical Wiring Schematic -- Carrier Rooftop Unit with PremierLink TM Controls

DIFFERENTIAL ENTHALPY CONTROL (Fig. 27) --

Differential enthalpy control requires both an enthalpy switch/

receiver (33CSENTHSW) and an enthalpy sensor

(33CSENTSEN). The enthalpy switch/receiver is mounted in

the outdoor air inlet and calculates outdoor air enthalpy. The

enthalpy sensor is mounted in the return airstream and calcu-

lates the enthalpy of the indoor ail:

The enthalpy switch/receiver energizes the HI Enthalpy re-

lay output when the outdoor enthalpy is greater than the indoor

enthalpy. 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 alti-

tude of 1000 ft above sea level.

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

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

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

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

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

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

through the holes in file sides of the enthtflpy switch/receivel:

Mount the enthalpy sensor in a location where the indoor air

can be sampled (such as the return air duct). The enflialpy

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

location flint 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 l/4-in, female spade connectol.s.

The PremierLink TM board provides 24 vac to power the

enthalpy switch/receivel: Connect the GND and 24 VAC termi-

nals on the enthalpy switch/receiver to the termimfls on the

transformer On some applications, the power from the econo-

mizer harness can be used to power the enthalpy switch/

receivel: To power the enthalpy switch/receiver from the econ-

omizer harness, connect power of the enthalpy switch/receiver

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

hmness.

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 bo_ud if desired. Wire the 24 VAC terminal on the

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

control. Wire file GND terminal on the enthalpy switch/

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

Enthalpy terminal is not used. See Fig. 27.

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

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

thalpy 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. 27.

Enthalpy Switch/Receiver Jumper Settings -- There me two

jumpers. One jumper determines the mode of the enthalpy

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

jumpers, remove the 4 screws holding the cover on the

enthalpy switch/receiver and then lemove the covel: The fac-

tory settings for the jumpers are M 1 and OFF.

The mode jumper should be set to M2 for differentkfl en-

thalpy control. The factory test jumper should remain on OFF

or the enthtflpy switch/receiver will not calculate enthalpy.

Enthalpy Sensor Jumper Settings -- There me two jumpers.

One jumper determines the mode of the enthalpy sensor. The

other jumper is not used. To access the jumpers, remove the

4 screws holding the cover on the enthalpy sensor and then m-

move the covet The factory settings for the jumpel,s am M3

and OFF.

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 enflialpy.

ENTHALPY SENSORS AND CONTROL -- The enthalpy

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

to be used with the EconoMi$er2 damper control option. The

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

separate field-installed accessory return air enflialpy 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

controllel: Ix)cate the controller in place of gin 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 preferred to the

mtum ail: An open contact indicates that the economizer

should remain tit minimum position.

Outdoor Air Enthalpy Sensor/Enthalpy Controller

(HH57AC077) -- To wire the outdoor air enthtflpy sensor,

perform file following (see Fig. 28 and 29):

NOTE: The outdoor air sensor can be removed from file 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

transformeg

2. Connect the following 4 wires from the wire harness

located in rooftop unit to the enthtdpy 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 enthtdpy sensol:

NOTE: Use the two gray wires provided from the control

section to the economizer to connect PmmierLink controller to

terminals 2 and 3 on enthalpy sensol:

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

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

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

outdoor enthalpy changeover set point is set at the controllel:

To wire the return air enthalpy sensor, perform the follow-

ing (see Fig. 28):

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

connect the return air enthalpy sensor to the enthalpy

controllel:

2. At the enthalpy control remove the factory-installed

resistor fi_m the (SR) and (+) terminals.

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

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

terminal on the enthalpy controllel: Connect the BLK

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

sensor and the (SR) terminal on the enthalpy controller.

120 VAC

LINE VOLTAGE

k._,.J_Aj--

24 VAC OUTPUT FROM N/C CONTACT WHEN

THE ORN

OUTDOOR ENTHALPY IS LESS THAN THE "

INDOOR ENTHALPY

24 VAC OUTPUT FROM N/O CONTACT WHEN THE

INDOOR ENTHALPY IS GREATER THAN THE

OUTDOOR ENTHALPY

HI LOW GND 24 4-20 24-36

ENTHALPY VAC rnA VDC

IN OUT

"_, 33CSENTHSW /

24-36 4-20

VDC rnA

IN OUT

_, 33CSENTSEN /

LEGEND

N/C -- Normally Closed

N/O -- Normally Open

JUMPER SE_INGS FOR 33CSENTHSW

[ °1[a°°°l

O010 OOO

Fig. 27 -- Differential Enthalpy Control Wiring

JUMPER SETTINGS FOR 33CSENTSEN

O _ ol

[ioOOI [ioOoOoO1

ENTHALPYCONTROLLER

RED _S (OUTDOORAIR I

TRI-_ITR1i'-LI,_IL_I BRN + ENTHALPY

BLK SENSOR)

A(_Csorh+E3--

SR¢-I+[]-

LED

--1

RED

I [] S (RETURN AIR I

[] + ENTHALPY

SENSOR

GRAY/ORN

LWIRE HARNESS

GRAY/RED JlN 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. 28 -- 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. 29- Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

OPTIONAL ECONOMISERIV AND ECONOMISER2 --

See Fig. 30 and 31 for EconoMiSerIV component locations.

See Fig. 32 for EconoMi$er2 component locations.

NOTE: These instructions are for installing the optiomd

EconoMiSerIV and EconoMiSer2 only. Refer to the accessory

EconoMiSerIV or EconoMiSer2 installation instructions when

field installing an EconoMi$erIV or EconoMiSer2 accessory.

To complete installation of the optional EconoMiSerIV. per-

form the following procedure.

1. Remove the EconoMiSerlV hood. Refer to Step 8 --

Install Outdoor-Air Hood on page 13 for information on

removing and inst_flling the outdoor-air hood.

2. Relocate outdoor air temperature sensor from shipping

position to operation position on EconoMiSerIV. See

Fig. 30.

IMPORTANT: Failure to relocate the sensor will result I

in the EconoMiSerIV not operating properly. I

3. Re-install economizer hood.

4. Install all EconoMiSerIV accessories. EconoMiSerIV

wiring is shown in Fig. 33. EconoMiSer2 wiring is shown

in Fig. 34.

Outdoor air leakage is shown in Table 7. Return air pressure

drop is shown in Table 8.

OUTDOOR AIR

TEMPERATURE SENSOR

SCREWS ECONOMI$ERIV FRAME SCREWS (INSTALLED OPERATION

/\ / \ POSiT,ON)

LOW TEMPERATURE

COMPRESSOR

LOCKOUT SWITCH

Fig. 30- EconoMi$erlV Component Locations --

End View

SUPPLY AIR

TEMPERATURE SENSOR

LOCATION

ECONOMI$ERIV

FLANGE

(HIDDEN)

Fig. 31 -- EconoMiSerlV Component Locations --

Side View

FRAME ECONOMI$ER2 SCREWS

TOP

SCREWS

Fig. 32 -- EconoMi$er2 Component Locations

Table 7 -- 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 8 -- 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

ECONOMI$ERIV 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-air temperature. The outdoor-air

temperature is used to determine when the EconoMiSerIV can

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

See Fig. 30. The operating range of temperature measurement

is 40 to 100E

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. 31. This sensor is factory installed. The op-

erating range of temperature measmement is 0° to 158 IF.See

Table 9 for sensor temperature/resistance v_dues.

The temperature sensor looks like an eyelet terminal with

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

and is settled from moisture.

Low Temperature Compressor Lockout Switch -- The

EconomiSerIV is equipped with an ambient temperature lock-

out switch located in the outdoor alLstream which is used to

lockout the compressoLs below a 42 F ambient temperature.

See Fig. 30.

Table 9 -- 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

246 116

257 102

266 89

284 70

302 55

TO MAIN

CONTROL

BOX

PLI*R

(NOT USED)

P(LI_8

Pckt - 5

PLI "9

PL1 =I

(

PR1 =R

PLI _ID

(ROT USED)

LEGEND

DCV -- Demand Controlled Ventilation

IAQ -- Indoor Air Quality

LALS-- Low Temperature Compressor

Lockout Switch

OAT -- Outdoor-Air Temperature

POT -- Potentiometer

YEL

PNK

-BLU

RED

--ORN {FIELD _NI _ _ EXHsEI

ACCESSORY) 4, ,__,

REI4OTEWIN

POSITION ROT BLK _V ]OV

SENSOR (3k Ohm) PO_

B_.X--I-RE D -

,AOSE._OL_k_ LP I _ ,0v

L_ ) AO RCV

OAT TEWP/ L- _4,.n_ _DCV

E_INALPY_LH__S+OSE_SOR _ _ 2V_ovSET

I I DLU

I I P"--_

) FIELD SPLICE LALS

L(DRN

FIE'LLD SPLICE RED )

EDONOMI ZER NOTOR

Potentiometer Default Settings: NOTES:

Power Exhaust Middle

Minimum Pos. Fully Closed

DCV Max. Middle

DCV Set Middle

Enthalpy C Setting

ECONOMISER Ii

BOARD

0,[

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. 33 -- EconoMi$erlV Wiring

NOTE 1

NOTE2

50HJ540573

ACTUATOR

ASSEMBLY

RUN

DIRECT DRIVE

ACTUATOR

500 OHM

RESISTO R---"L_

OAT

PINK

BLUE

RED

BLACK

WHITE

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. 34 -- EconoMi$er2 Wiring

ECONOMISERIV CONTROL MODES

IMPORTANT: The optional EconoMiSer2 does not

include a controllel: The EconoMiSer2 is operated by a 4 to

20 mA signal from an existing field-supplied controller

(such as PremierLink TM control). See Fig. 34 for wiring

information.

Determine the EconoMiSerIV control mode before set up of

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

sors. Refer to Table 10. The EconoMiSerlV is supplied from the

factory with a supply air temperature sensor, a low temperature

compressor lockout switch, and an outdoor air temperature

sensol: This _fllows for operation of the EconoMiSerlV with

outdoor air &y bulb changeover control. Additional accesso-

ries can be added to allow for different types of changeover

control and operation of the EconoMiSerlV and unit.

Table 10 -- EconoMi$erlV Sensor Usage

APPLICATION

Outdoor Air

Dry Bulb

Differential

Dry Bulb

Single Enthalpy

Differential

Enthalpy

002 for DCV

Control using a

Wall-Mounted

CO2 Sensor

CO2 for DCV

Control using a

Duct-Mounted

CO2 Sensor

ECONOMI$ER IV WITH OUTDOOR AIR

DRY BULB SENSOR

Accessories Required

None. The outdoor air dry bulb sensor

is factory installed.

CRTEMPSN002A00*

HH57AC078

and

CRENTDIF004A00*

33ZCSENCO2

33ZCSENCO2t

and CRCBDIOX005A00tt

33ZCASPCO2**

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on

many different base units. As such, these kits may contain 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-]-CRCBDiOX005A00 is an accessory that contains both 33ZCSENCO2

and 33ZCASPCO2 accessories.

Outdoor Dry Bulb Changeover -- The standard controller is

shipped from the factory configured for outdoor dry bulb

changeover control. The outdoor air and supply air temperature

sensol_ are included as stan&trd. For this control mode, the

outdoor temperature is compmed to an adjustable set point

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

the set point, the EconoMiSerIV will adjust the outside air

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

below the set point, the position of the outdoor air dampers will

be controlled to provide free cooling using outdoor air. When

in this mode, the 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. 35. The sc_de on the potentiometer is A,

B, C, and D. See Fig. 36 for the conesponding temperature

changeover v_dues.

Differential DLy Bulb Control -- For differential dry bulb

control the standard outdoor dry bulb sensor is used in conjunc-

tion with an additional accessory return air sensor (part number

CRTEMPSN002A00). The accessory sensor must be mounted

in the return airstream. See Fig. 37.

In this mode of operation, the outdoor-tfir 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 cooling/enthalpy setpoint po-

tentiometer fully clockwise to the D setting. See Fig. 35.

Outdoor Enthalpy Changeover -- For enthalpy control, ac-

cessory enthalpy sensor (p_ut number HH57AC078) is

required. Replace the standard outdoor dry bulb temperature

sensor with the accessory enthalpy sensor in the same mount-

ing location. See Fig. 30. 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 enth_dpy

set point potentiometer on the EconoMiSerIV controllel: The

set points are A, B, C, and D. See Fig. 38. The factory-installed

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

on the EconoMiSerIV controllel: See Fig. 33 and 39.

FAN SET POINT

WHEN EXHAUST

CONTACT tS MADE

MINIMUM

POSITION SETTING

MAXIMUM

DEMAND CONTROL

VENTILATION SET POINT

LED LIGHTS

DEMAND CONTROL

VENTILATION INPUT

IS ABOVE SET POINT

VENTILATION SET POINT

LED LIGHTS WHEN

OUTDOOR AiR iS

SUITABLE FOR

FREE COOLING

FREE COOLING/ENTHALPY

CHANGEOVER SET POINT

Fig. 35 -- EconoMi$erlV Controller Potentiometer

and LED Locations

18-!_

17-i

16_ -- - LED OFF LED ON

<15" I

E14- ! LED OFF -

13"

12-

4O 45 50 55 60

[ L

LED O;

_'-_L_ LED ON- --

65 70 75 80 85 90 95 100

DEGREES FAHRENHEIT

Fig. 36 -- Outside Air Temperature

Changeover Set Points

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 on the EconoMiSer[V

frame. Tile EconoMiSerIV controller compares the outdoor air

enthalpy to file return air enthalpy to determine EconoMiSer[V

use. Tile controller selects the lower enthalpy air (return or

outdoor) for cooling. For example, when file outdoor air has a

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

EconoMiSerIV opens to bring in outdoor _firfor fiee cooling.

Replace the standard outside air dUbulb temperature sen-

sor with the accessory enthalpy sensor in the stone mounting

location. See Fig. 30. Mount the return air enth_dpy sensor in

the return airstremn. See Fig. 37. Tile outdoor enth_dpy

changeover set point is set with the outdoor enthalpy set point

potentiometer on the EconoMiSerIV controller. When using

this mode of changeover control, turn the enthalpy set point

potentiometer fully clockwise to the D setting.

NOTE: Remove 620-ohm resistor if differentkd enthalpy

sensor is installed,

Indoor Air Ouality (IAO) Sensor Input -- Tile 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 conespond to the DCV voltage output of the indoor air

quality sensor at the use>determined set point. See Fig. 40.

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

IAQ sensol: the sensor must not be grounded or the

EconoMiSer[V control board will be &imaged.

RETURN AIR

IAQ TEMPERATURE

SENSOR AND ENTHALPY

SENSOR

Fig. 37 -- Return Air Temperature or Enthalpy

Sensor Mounting Location

CONTROL CONTROLPOINT

CURVE APPROXI°F (°C)

AT 50% RH

A 73(23)

B 70(21)

C 67119 )

D 63(17)

35 40

(2) (4)

85 90 95 100 105 110

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

_ HIGH LIMIT

\ CURVE

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

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

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

Fig. 38 -- Enthalpy Changeover Set Points

FFr_I EF1

....... @

....._ 4

Fig. 39- EconoMi$erlV Controller

6000

5000

Q 4000

3000

2000

z 1000

CO 2 SENSOR MAX RANGE SETTING

+800 ppm

__ _ 9o0 ppm

1000 ppm

+1100 ppm

2345678

DAMPER VOLTAGE FOR MAX VENTILATION RATE

Fig. 40 -- 002 Sensor Maximum Range Setting

Exhaust Set Point Adjustment -- The exhaust set point will

determine when the exhaust fan runs based on dmnper position

(if accessol 7 power exhaust is installed). The set point is modi-

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

See Fig. 35. The set point replesents file &tmper position above

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

for exhaust, the EconoMi$erlV controller provides a 45 _+15

second delay before exhaust fan activation to allow the damp-

ers to open. This delay _dlows the damper to reach the appro-

priate position to avoid unnecessary fan overload.

Minimum Position Control -- There is a minimum damper

position potentiometer on the EconoMi$erlV controllel: See

Fig. 35. The minimum &tmper 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 requilements. 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 air. 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 I---_T ) + (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 E

(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 remote &tmper positioning is being

used, make sure that the termimds are wired according to

Fig. 33 and that the minimum position potentiometer is

turned fully clockwise.

4. Connect 24 vac across termimds TR and TRI.

5. Cmefully adjust the minimum position potentiometer

until the measured mixed-air temperature matches the

calculated v_due.

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

Remote control of the EconoMi$erIV dmnper is desirable

when requiring additional temporm 7 ventilation. If a

field-supplied remote potentiometer (Honeywell part number

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

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

location.

To control the minimum dalnper 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 EconoMiSerIV controllel:

See Fig. 39.

Damper Movement -- Damper movement from full open to

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

Thermostats -- The EconoMi$erIV 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

EconoMi$erIV control does not support space temperature

sensors. Connections are made at the thermostat terminal con-

nection board located in the main control box.

Occupancy Control -- The factory default configuration for

the EconoMi$erIV control is occupied mode. This is imple-

mented by the RED jumper at TB2-9 to TB2-10. When unoc-

cupied mode is desired, remove the RED jumper and install a

field-supplied timeclock function between TB2-9 and TB2-10.

When the timeclock contacts are open, the unit control will be

in unoccupied mode; when contacts are closed, file unit control

will be in occupied mode.

Demand Controlled Ventilation (DCV) -- When using the

EconoMi$erIV 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 evaluated for

design conditions. The maximum damper position must be cal-

culated to provide the desired fresh all:

Typicallythe maximum ventilation rate will be about 5 to

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

nonnal 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 requited ventila-

tion rate at design conditions. Exceeding the required ventila-

tion rate means the equipment can condition tfir at a maximum

ventilation rate that is greater than the requited ventilation rate

for maximum occupancy. A propot_tional-anticipatou 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 CO: level teaches the set point, the

damper will be at maximum ventilation and should maintain

the set point.

In order to have the COo_ sensor control the economizer

damper in this manner, first determine the &mper voltage out-

put for minimum or base ventilation. Base ventilation is the

ventilation required to remove contmninants during unoccu-

pied periods. The following equation may be used to determine

the percent of outside-air entering the building for a given

damper position. For best results there should be at 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 determined, set the mini-

mum damper position potentiometer to the correct position.

The same equation can be used to determine the occupied or

maximum ventilation rate to the building. For example, an 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 cfm pet person). Use Fig. 40

to determine the maximum setting of the CO: sensot: For ex-

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

sign. Use the 1100 ppm curve on Fig. 40 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 at 1100 ppm. The DCV set point may be left at 2 volts

since the CO2 sensor voltage will be ignored by the

EconoMi$erIV controller until it rises above the 3.6 volt setting

of the minimum position potentiometer.

Once the fully occupied damper position has been deter-

mined, set the maximum damper 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.2 Sensor Configuration -- The CO2 sensor has preset

stan&trd voltage settings that can be selected anytime after the

sensor is powered up. See Table 11.

Use setting 1 or 2 for Carrier equipment. See Table 11.

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 appear.

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

Table 11.

4. Press Enter to lock in the selection.

5. Press Mode to exit and resume normal 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-standard 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 appeat:

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

and press Enter

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 variable.

Dehumidification of Fresh Air with DCV Control -- Infor-

mation fiom ASHRAE indicates that the lmgest humidity load

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

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

file moisture content of the fresh air being brought into the

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

heating and cooling processes am morn than adequate to

remove file humidity loads for most commemi_fl 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 11 -- 002 Sensor Standard Settings

SETTING EQUIPMENT

2 Interface w/Standard

Building Control System

Economizer

8 Health & Safety

9 Parking/Air Intakes/

Loading Docks

LEGEND

ppm -- Parts Per Million

OUTPUT

Proportional

Exponential

Proportional

Exponential

Proportional

VENTILATION

RATE

(cfm/Pereon)

Any

ANALOG

OUTPUT

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

0-10V

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

7OO

RELAY

HYSTERESIS

(pprn)

5OO

Step 11 -- Install Humidistat for Optional

MoistureMi$er TM Package-- MoistureMiSer dehu-

midification package operation can be controlled by field in-

st;dlation ofa Canier-approved humidistat, To install the humi-

distat perform the following procedure:

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 equivalent single leads of col-

oled wire from Humidistat termimds through conduit in

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

strip (TB3) as shown in Fig, 41 and 42, Remove the

jumper from TB3, See Fig. 43 for operational diagram.

Fig. 42 -- Typical MoistureMi$er Dehumidifcation

Package Control Box

MOISTUREMI$ER

_'_YEL-

BLK

BLK_

CB --

LLSV --

LPS --

TB --

TRAN --

YEL.

TRAN_

GRN YEL

LEGEND

Circuit Breaker

Liquid Line Solenoid Valve

LowPressure Switch

Terminal Block

Transformer

TRAN

24V

GRN YEL

TO CRANKCASE

/ HEATER CIRCUITS

BLK

S LPS1 8 LLSVLsw2_

BLK--

3 2AMPS _ L S_SLPS2 • L

FACTORY INSTALLED JUMPER

(OR HUMIDISTAT IF USED)

Fig. 41 -- Typical MoistureMi$er Dehumidification Package

Humidistat Wiring Schematic (460 V Unit Shown)

CONDENSER COIL ,

SUCTION

l DISCHARGE

p-CCH

J CRANKCASE LIQUID

HEATER

\°COMPRESSOR

OUTDOORAIR

EVAPORATOR

COIL

EQUALIZER

LINE

COIL

3-WAY

VALVE

S-LPS _

SUB COOLER CONTROL

LOW PRESSURE SWITCH

EQL

TXV INDOOR AIR

TXV -- Thermostatic Expansion Valve

Fig. 43 -- MoistureMi$er TM Operation Diagram

START-UP

Use the following information and St_ut-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.

INTERNAL WIRING -- Check all electric;d connections in

unit control boxes; tighten as required.

CRANKCASE HEATER--Heater is energized as long as

there is power to unit and compressor is not operating.

IMPORTANT: Unit power must be on for 24 hom_ prior to ]

start-up. Otherwise, dmnage to compressor may result. I

COMPRESSOR MOUNTING -- Compressors are intern_d-

ly spring mounted. Do not loosen or remove compressor hold-

down 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 complessor discharge

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

v_dves are located underneath the low-plessure switches. Be

sure that caps on the ports are tight.

COMPRESSOR ROTATION -- It is important to be certain

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

mine whether or not compressors tue rotating in the proper

direction:

1. Connect service gages to suction and discharge pressure

fittings.

2. Energize the compressol:

3. The suction pressure should drop and the discharge pres-

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

If the suction pressme does not drop and the discharge pres-

sure does not rise to normal levels:

1. Note that the evaporator fan is probably _dso 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 compmssoc

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 increased noise levels and will not provide

heating and cooling.

After a few minutes of reverse operation, the scroll com-

pressor internal overload protection will open, which will acti-

vate the unit's lockout and requires a manual reset. Reset is ac-

complished by turning the thermostat on and off.

EVAPORATOR FAN- Fan belt and variable pulleys are

factory installed. Remove tape from the fan pulley. See

Table 12 for air quantity limits. See Tables 13-16 for fan perfor-

mance data. Be sure that rims rotate in the proper direction. See

Table 17 for static pressure information for accessories and

options. See Table 18 for fan rpm at various fan motor pulley

settings. See Tables 19 and 20 for evaporator fan motor data.

To alter fan performance, see Evaporator-Fan Performance

Adjustment section, page 37.

Table 12 -- Air Quantity Limits

UNIT MINIMUM CFM MAXIMUM CFM

50TM

016 4500 7,500

020 5400 9,000

025 6000 10,000

028 7000 11,250

CONDENSER FANS AND MOTORS -- Fans and motors

are factory set. Refer to Condenser-Fan Adjustment section

(page 38) as required.

RETURN-AIR FILTERS -- Check that correct filtel_ are in-

stalled in filter tracks. See Table 1. Do not operate unit without

return-air filters.

OUTDOOR-AIR INLET SCREENS -- Outdoor-air inlet

screens must be in place before operating unit.

Table 13 -- Fan Performance -- 50TM016*

AIRFLOW

(Cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

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 1,53 753

747 1384 1,62 747

741 1465 1,72 752

735 1659 1,95 805

759 1854 2,18 832

790 2088 2.45 860

821 2340 2.74 888

852 2611 3.06 917

883 2903 3,40 946

914 3215 3,77 975

1307 1.53 784

1384 1.62 806

1500 1.76 828

1895 2.22 876

2118 2.48 901

2360 2.77 926

2621 3.07 952

2900 3.40 979

3200 3.75 1006

3521 4.13 1033

1397 1,64 859

1563 1,83 878

1745 2,05 898

2156 2,53 942

2388 2,80 965

2638 3.09 988

2906 3,41 1013

3194 3,75 1038

3501 4,11 1063

3830 4,49 1089

1635 1.92 928 1880 2.20

1808 2.12 946 2060 2.42

1996 2.34 964 2255 2.65

2423 2.84 1004 2696 3.16

2663 3.12 1026 2943 3.45

2920 3.43 1048 3208 3.76

3196 3.75 1070 3491 4.10

3492 4.10 1094 3794 4.45

3807 4.47 1118 4117 4.83

4143 4.86 1142 4461 5.23

AIRFLOW

(Cfm)

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

4599 993 2133 2.50 1055 2394 2.81 1114

4809 1009 2319 2.72 1070 2585 3.03 1127

5100 1026 2521 2.96 1086 2794 3.28 1142

5700 1064 2975 3,49 1120 3260 3.82 1174

6000 1083 3228 3,79 1139 3520 4.13 1192

6300 1104 3501 4,11 1158 3799 4.46 1210

6600 1125 3791 4,45 1178 4095 4.80 1229

6900 1147 4101 4,81 1199 4412 5.18 1249

7200 1170 4431 5,20 1221 4749 5.57 1270

7500 1193 4781 5,61 1243 5107 5,99 --

2662 3,12 1170 2938 3.45 1224 3220 3.78

2859 3,35 1183 3139 3.68 1236 3427 4.02

3073 3,60 1196 3359 3.94 1248 3650 4.28

3551 4,17 1226 3848 4.51 1277 4151 4.87

3817 4,48 1243 4119 4.83 1292 4427 5.19

4102 4,81 1260 4410 5.17 1309 4724 5.54

4405 5,17 1278 4720 5.54 1326 5039 5.91

4728 5.55 1297 5050 5.92 -- -- --

5072 5.95 ......

AIRFLOW

(Cfm)

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2,2 2,4 2,6 2.8 3,0 3,2

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

4500 1276 3509 4,12 1326 3805 4,46 1375 4107 4,82 1421 4414 5.18 1467 4728 5.55 1511 5047 5.92

4800 1287 3721 4,36 1336 4020 4,72 1384 4326 5,07 1430 4638 5.44 1475 4955 5,81 -- -- --

5100 1299 3949 4.63 1347 4253 4.99 1395 4563 5.35 1440 4879 5.72 ......

6700 1325 4458 5.23 1373 4772 5.60 1418 5091 5.97 .........

6000 1340 4741 5.56 1387 5060 5.93 ............

6300 1356 5043 5.91 ...............

6600 ..................

6900 ..................

7200 ..................

7500 ..................

LEGEND NOTES:

Bhp -- Brake Horsepower 1. Maximum continuous bhp for the standard motor is 6.13. The maximum

Watts-- Input Watts to Motor continuous watts is 5180. Do not adjust motor rpm such that motor max-

imum bhp and/or watts is exceeded at the maximum operating cfm.

*Standard low-medium static drive range is 873 to 1021 rpm. Alternate high- 2. See page 33 for general fan performance notes.

static drive range is 1025 to 1200. Other rpms require a field-supplied drive.

Table 14 -- Fan Performance -- 50TM020*

AIRFLOW

(Cfm)

5,500

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

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

682 1,99 1675 760 2.29 1922 832 2.59 2177 901 2,90 2441 965 3.22 2712 1027 3.56 2990

730 2,38 2005 802 2.68 2257 871 2.99 2516 935 3,31 2783 997 3.63 3057 1056 3.97 3337

778 2,82 2373 846 3.13 2630 911 3.44 2893 972 3,76 3164 1031 4.09 3440 1087 4.43 3722

828 3,31 2780 892 3.62 3042 953 3.94 3310 1011 4,26 3583 1067 4.59 3863 1121 4.93 4148

878 3,84 3227 938 4.15 3494 996 4.48 3766 1051 4,81 4043 1105 5.14 4326 1156 5.49 4613

928 4,42 3715 985 4.74 3986 1040 5.07 4263 1093 5,40 4544 1144 5.74 4830 1194 6.09 5120

979 5,05 4245 1033 5.38 4521 1085 5.71 4801 1136 6,05 5086 1185 6.39 5375 1232 6.74 5669

1030 5.73 4817 1082 6.06 5098 1131 6.40 5382 1180 6.74 5671 1227 7.09 5964 1272 7.44 6260

1082 6.46 5433 1131 6.80 5718 1178 7.14 6007 1225 7.49 6299 1270 7.84 6595 1313 8.20 6895

1134 7.25 6093 1180 7.59 6382 1226 7.94 6675 1270 8.29 6971 1313 8.65 7271 1356 9.01 7574

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

(Cfm) 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 1086 3,89 3275 1142 4,24 3567 1197 4,59 3864 1223 4,77 4015 1249 4,96 4167

6,000 1112 4.31 3623 1167 4.66 3915 1219 5.01 4213 1245 5.19 4364 1270 5.37 4516

6,500 1142 4.77 4010 1194 5.12 4304 1245 5.47 4602 1270 5.65 4754 1294 5.83 4906

7,000 1173 5.28 4438 1224 5,63 4733 1273 5.98 5033 1296 6,17 5184 1320 6,35 5337

7,500 1207 5.83 4906 1255 6,19 5203 1302 6,55 5504 1326 6,73 5657 1348 6,91 5810

8,000 1242 6.44 5415 1289 6.80 5714 1334 7.16 6018 1357 7.34 6171 1379 7.52 6325

8,500 1279 7.10 5966 1324 7.45 6268 1368 7.82 6573 1389 8.00 6728 1411 8.18 6883

9,000 1317 7.80 6561 1360 8.16 6865 1403 8.53 7173 1424 8.71 7328 1445 8.90 7484

9,500 1356 8,56 7198 1398 8,93 7505 1440 9,29 7815 1460 9,48 7972 1480 9,67 8129

10,000 1397 9.37 7881 1438 9.74 8190 1477 10.11 8503 ......

LEGEND NOTES:

Bhp -- Brake Horsepower 1. Maximum continuous bhp is 5.90. The maximum continuous watts is

Watts-- Input Watts to Motor 5180. Do not adjust motor rpm such that motor maximum bhp and/or

watts is exceeded at the maximum operating cfm.

*Standard low-medium static drive range is 910 to 1095 rpm. Alternate high- 2. See page 33 for general fan performance notes.

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

drive.

AIRFLOW

(Cfm)

6,000

6,500

7,000

7,500

8,000

8,500

9,000

9,500

10,000

Table 15- Fan Performance- 50TM025"

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 Wa_s Bhp Rpm Wat_ Bhp

753 2385 2.83 816 2579 3.06 884 2807 3.33 949 3040 3.61 1010 3277 3.89

793 2738 3.25 861 2959 3.51 925 3186 3.78 987 3418 4.05 1045 3653 4.33

844 3151 3.74 908 3372 4.00 968 3598 4.27 1026 3828 4.54 1082 4062 4.82

895 3596 4.27 955 3817 4.53 1013 4042 4.80 1068 4271 5.07 1121 4504 5.34

947 4073 4.83 1004 4294 5.09 1058 4518 5.36 1111 4747 5.63 1162 4978 5.91

999 4583 5.44 1053 4803 5.70 1105 5027 5.96 1155 5255 6,23 1204 5485 6.51

1052 5125 6.08 1103 5345 6.34 1152 5569 6.61 1200 5796 6.88 1247 6025 7.15

1105 5699 6.76 1153 5919 7.02 1200 6142 7.29 1246 6369 7.56 1291 6598 7.83

1158 6306 7.48 1204 6526 7.74 1249 6750 8.01 1293 6975 8.27 1336 7203 8.55

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

1089 3517 4.17 1125 3761 4.48 1180 4008 4.75 1232 4255 5.05 1283 4506 5.35

1102 3891 4.62 1156 4132 4.90 1208 4377 5.19 1259 4623 5.48 1308 4871 5.78

1136 4299 5.10 1188 4538 5.38 1239 4780 5.87 1288 5025 5.98 1335 5271 6.25

1173 4739 5.62 1223 4977 5.90 1272 5217 8.19 1319 5460 6.48 1365 5705 6.77

1211 5212 8.18 1259 5449 8.48 1308 5888 8.75 1352 5929 7.03 1398 8172 7.32

1251 5718 8.78 1297 5954 7.08 1342 6192 7.35 1386 6431 7.63 1429 8873 7.92

1292 6257 7.42 1337 6492 7.70 1380 6729 7.98 1423 6967 8.27 1464 7207 8.55

1335 6830 8.10 1377 7063 8.38 1419 7299 8.86 1460 7536 8.94 1501 7776 9.22

1378 7434 8.82 1419 7667 9.10 1460 7902 9.37 1499 8138 9.65 1538 8377 9.94

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 Wa_s Bhp Rpm Wa_s Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

1332 4750 5.85 1380 5015 5.95 1427 5272 8.25 1472 5531 8.56 1517 5793 6.87

1356 5122 8.08 1402 5375 6.38 1447 5630 8.88 1492 5888 8.98 1535 6144 7.29

1381 5519 6.55 1427 5770 6.84 1471 6022 7.14 1514 6276 7.45 -- -- --

1409 5951 7.06 1453 6199 7,35 1496 6449 7.65 1538 6701 7.95 -- -- --

1440 6417 7.61 1482 6663 7.90 1523 6911 8.20 ......

1471 6916 8.20 1513 7161 8.49 .........

1505 7449 8.84 1545 7693 9.13 .........

1540 8016 9.51 ............

LEGEND

Bhp -- Brake Horsepower

Watts -- Input Wattsto Motor

*Standard low-medium static drive range is 1002 to 1151 rpm. Alternate high-

static drive range is 1193 to 1369. Other rpms require a field-supplied drive.

NOTES:

1. 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 230 and 460-v units).

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

exceeded at the maximum operating cfm.

2. See page 33 for general fan performance notes.

Table 16 -- Fan Performance -- 50TM028"

AIRFLOW

(Cfm)

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

7,000 845 3.26 2693 909 3.60 2979 969 3.96 3272 1028 4.32 3574 1083 4.70 3883 1137 5.08 4,200

7,500 896 3.82 3156 956 4.17 3450 1014 4.54 3752 1069 4.91 4060 1123 5.29 4375 1174 5.68 4,698

8,000 948 4.43 3667 1005 4.80 3969 1060 5.17 4278 1112 5.56 4593 1163 5.94 4915 1213 6.34 5,243

8,500 1001 5.11 4226 1054 5.49 4537 1106 5.87 4853 1156 6.26 5175 1205 6.66 5504 1253 7.06 5,838

9,000 1053 5.85 4836 1104 6.23 5155 1154 6.63 5478 1202 7.02 5808 1248 7.43 6142 1294 7.84 6,483

9,500 1106 6.65 5498 1155 7.04 5824 1202 7.44 6155 1248 7.85 6492 1293 8.26 6833 1336 8.68 7,179

10,000 1159 7.52 6214 1206 7.92 6547 1251 8.33 6886 1295 8.74 7229 1338 9.16 7577 1380 9.59 7,929

10,500 1213 8.45 6984 1257 8.86 7325 1300 9.28 7671 1342 9.70 8020 1384 10.13 8375 1424 10.56 8,733

11,000 1266 9.45 7810 1309 9.87 8159 1350 10.29 8511 1391 10.73 8868 1431 11.16 9229 1470 11.60 9,594

11,250 1293 9.97 8245 1334 10.40 8597 1375 10.83 8953 1415 11,26 9313 1454 11.70 9677 1493 12.15 10,045

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

1189 5.47 4,524 1239 5.87 4,854 1288 4.91 5191

1224 6,08 5,026 1272 6.48 5,362 1320 5,56 5703

1261 6,75 5,577 1307 7.16 5,917 1353 6,26 6263

1299 7.47 6,177 1344 7.89 6,523 1388 7,02 6873

1338 8.26 6,828 1382 8.68 7,179 1424 7.85 7534

1379 9.11 7,530 1421 9.54 7,887 1462 8,74 8247

1421 10.02 8,286 1461 10,46 8,648 1501 9,70 9014

1464 11.00 9,096 1503 11,45 9,464 1541 10,73 9835

1508 12.05 9,963 1546 12.50 10,336 -- -- --

1530 12.60 10,417 ......

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 Evaporator Fan Motor Data

tables for more information.

GENERAL FAN PERFORMANCE NOTES

NOTES:

1. Values include losses for filters, unit casing, and wet coils. See

Table 17 for accessory/factory-installed option static pressure

information.

2. Extensive motor and electrical testing on these units ensures

that the full range of the motor can be utilized with confidence.

Using fan motors up to the wattage ratings shown will not result

in nuisance tripping or premature motor failure. Unit warranty

will not be affected. See Evaporator-Fan Motor Performance

data in Table 19 on page 34 for additional information.

3. Use of a field-supplied motor may affect wire sizing. Contact

your Carrier representative for details.

4. Interpolation is permissible. Do not extrapolate.

Table 17 -- Accessory/FlOP Static Pressure (in. wg) -- 50TM016-028

CFM

7200 9000

Economizer

Glycol Coil

Electric Heat (kW)

26/34

42/56

56/75

MoietureMi$er TM Dehumidification

LEGEND

FlOP -- Factory-Installed Option

COMPONENT 5400 I 6000 10,000 11,250

0.06 J0.07 0.09 0.11 0.12 0.14

0.30 0.35 0.44 0.58 0.66 0.77

0.08 0.09 0.11 0.15 0.17 0.20

0.11 0.12 0.15 0.19 0.21 0.24

0.14 0.15 0.20 0.24 0.26 0.29

0.06 0.07 0.10 0.16 0.20 0.25

NOTES:

1. 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 deter-

mine blower rpm and watts.

2. Heaters are rated at 240 v and 480 v. There are no 575-v

heaters.

Table 18 -- Fan Rpm at Motor Pulley Settings*

UNIT

50TM 0 16 1 116 2 216

016t tt tt tt tt 1021 1002

016"* tt tt tt tt 1200 1178

020t tt tt 1095 1077 1058 1040

020** tt tt 1287 1265 1243 1222

025t tt tt tt ?t 1151 1132

025** tt tt tt tt 1369 1347

028t tt tt 1283 1269 1247 1225

028** tt tt -- -- 1551 1524

*Approximate _n rpm shown.

tlndicates standard drive package.

**Indicates alternate drive package.

ttDue to belt and pulley size, pulley cannot be set to this number of turns open.

MOTOR PULLEY TURNS OPEN

3316 4 416 5 516 6

984 965 947 928 910 891 873

1156 1134 1112 1091 1069 1047 1025

1021 1002 984 965 947 928 910

1200 1178 1156 1134 1112 1091 1069

1114 1098 1077 1058 1040 1021 1002

1325 1303 1281 1259 1237 1218 1193

1203 1182 1160 1138 1116 1098 1066

1497 1470 1443 1418 1388 1361 1332

Table 19- Evaporator-Fan Motor Performance

UNIT UNIT

50TM VOLTAGE

208/230

016 460

575

208/230

020 460

575

206/230

025 460

575

208/230

028 460

575

LEGEND

BHP -- Brake Horsepower

BkW-- Brake Kilowatts

MAXIMUM MAXIMUM MAXIMUM

ACCEPTABLE ACCEPTABLE ACCEPTABLE MAXIMUM

CONTINUOUS CONTINUOUS OPERATING AMP DRAW

BHP* BkW* WATTS

6.13 4.57 5,180 15.8

6.13 4.57 5,180 7.9

6.13 4.57 5,180 6.0

5.90 4.40 5,180 15.8

5.90 4.40 5,180 7.9

5.90 4.40 5,180 6.0

8.70 6.49 7,915 22.0

9.50 7.08 8,640 13.0

8.70 6.49 7,915 10.0

10.20 7.61 9,510 28.0

11.80 8.80 11,000 14.6

10.20 7.61 9,510 13.0

*Extensive motor and electrical testing on these units ensures that the full horsepower (brake kilowatt) range of the

motors can be utilized with confidence. Using your 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 5 hp and larger meet the minimum efficiency requirements as established by the Energy

Policy Act of 1992 (EPACT) effective October 24, 1997.

Table 20 -- Evaporator-Fan Motor Efficiency

MOTOR HORSEPOWER MOTOR EFFICIENCY

!%)

5 Hp 87.5

7,5 Hp 88,5

10 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

thennostat calls for cooling, termimds G and YI ale energized.

The indoor (evaporator) fan contactor (IFC), outdoor fan contac-

tot (OFC), and compressor contactor no. 1 (Ci) m'e energized

and evaporator-fan motol: condenser fans and compressor no. 1

stall. The condenser-fan motors run continuously while unit is

cooling. If the thermostat calls for a second stage of cooling by

energizing Y2, compressor contactor no. 2 (C2) is energized and

compressor no. 2 starts.

HEATING. UNITS WITHOUT ECONOMIZER (If Optional

or Accessory Heater is Installed) --Upon a call for heating

through terminal WI, IFC and heater contactor no. 1 (HCi) are

energized. On units equipped for 2 stages of heat, when addi-

tional heat is needed HC2 is energized through W2.

COOLING. UNITS WITH ECONOMISERIV --When free

cooling is not available, the compressors will be controlled by

the zone thermostat. When free cooling is available, the

outdoor-air &unper is modulated by the EconoMiSerlV control

to provide a 50 to 55 F supply-air temperature into the zone. As

the supply-air temperature fluctuates above 55 or below 50 IF.

the dampel.s will be modulated (()pen or close) to bring the sup-

ply-air temperature back within set point limits.

For EconoMiSerIV 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 dmnpers will modu-

late from 100% open to the minimum open position. From 50 F

to 45 F supply-air temperature, the &_mpers will maintain at

the minimum open position. Below 45 F the dampers will be

completely shut. As the supply-air temperature rises, the damp-

ers will come back open to the minimum open position once

the supply-air temperature rises to 48 E

If optional power exhaust is inst_flled, as the outdoor-air

damper opens and closes, the power exhaust fans will be ener-

gized and deenergized.

If Iield-installed accessory CO2 sensors are connected to the

EconoMiSerIV 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 &_mper

will be increased proportionally. As the CO2 level decreases

because of the increase in fresh ail: the 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 lhll open (or vice

vel_a) will take between 11/2and 21/2 minutes.

If free cooling can be used as determined from the appropri-

ate changeover command (switch, diy bulb, enthalpy curve,

differential dry bulb, or differential enthalpy), a call for cooling

(YI closes at the thermostat) will cause the control to modulate

the &tmpel_ open to maintain the supply air temperature set

point at 50 to 55 IF.

As the supply-air temperature diops below the set point

range of 50 to 55 IF.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 the Heating, Units Without Economizer

section. When the indoor fan is energized, the economizer

damper moves to the minimum position. When the indoor fan

is off. then the economizer dmnper is fully closed.

COOLING. UNITS WITH ECONOMISER2, PREMIER-

LINK TM CONTROL AND A THERMOSTAT -- When free

cooling is not available, the compressol_ will be controlled by

the PremierLink control in response to the YI and Y2 inputs

from the thermostat.

The PremierLink control will use the following information

to determine if free 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 occm.s when there is no call from the thermostat

except G Pre-cooling is defined as the economizer modulates

to provide 70 F supply _fil:

When free cooling is available the PremierLink control will

control the compressors, energize the reversing valve(s) and

economizer to provide a supply-air temperature determined to

meet the YI and Y2 calls from the therlnostat using the follow-

ing three routines. The three control routines are based on OAT.

The 3 routines are 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 E

• 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 1 and 2 are cycled based on YI and Y2

using minimum on and off times and watching the

supply-air temperature as compared to SATLOI and

SATLO2 set points.

If optional power exhaust is installed, as the outdoor-air

&tmper opens and closes, the power exhaust fans will be ener-

gized and deenergized.

If field-installed accessory CO2 sensors me connected to the

PremierLink control, a PlD-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

&_mper will be increased proportionally. As the CO2 level

decreases because of the increase in fresh air, the outdoor-air

&tmper will be proportionally closed.

HEATING. UNITS WITH ECONOMISER2, PREMIERLINK

CONTROL AND A THERMOSTAT -- When the thermostat

calls for heating, terminal WI is energized. The PremierLink

control will move the economizer damper to the minimum po-

sition if there is a call for G and closed if there is a call for WI

without G. In order to prevent thermostat from short cycling,

the unit is locked into the heating mode for at least 10 minutes

when WI is energized.

On units equipped for two stages of heat, when additional

heat is needed, W2 is energized and the electric heat (if used)

comes on. When the thermostat is satisfied and WI is deener-

gized, the [FM stops.

COOLING. UNITS WITH ECONOMI$ER2, PREMIER-

LINK TM 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 cfdcula-

tion as indicated by Fig 44.

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 E

• 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 available, 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 maintain the space tempera-

ture between the heating and cooling set points as indicated in

Fig. 45.

The PlemierLink control will integrate the compressw_

stages with the economizer based on similar logic as the three

routines listed in the previous section. The SASP will float up

and down based on the error reduction calculations that com-

ptue space temperature and space set point. The reversing

vfdves will be energized.

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 se-

quence is completed. This plevents the supply-air temperature

from diopping 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

cfdculated 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 initifd 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. 45.

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 ale not met, the economizer

submaster reference (ECSR) is set to maximum limit and the

dmnper moves to minimum position. The operating sequence

is complete. The ECSR is lecalculated eve U30 seconds.

If an optional power exhaust is instfdled, as the outdoor-air

dmnper opens and closes, the power exhaust fans will be

energized and deenergized.

If field-installed accessory CO2 sensors me connected to

the PlemierLink 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 fresh all: the outdoor-air

damper will be proportionally closed.

HEATING. UNIT WITH ECONOMISER2, PREMIERLINK

CONTROL AND A ROOM SENSOR -- Every 40 seconds

the controller will cfflculate the required heat stages (maximum

of 3) to mainttfin supply-air temperature (SAT) if the following

qufdifying conditions are met:

• Indoor fan has been on for fit least 30 seconds.

• COOL mode is not active.

• OCCUPIED, TEMRCOMPENSATED START or HEAT

mode is active.

• SAT reading is available.

• Fire shutdown mode is not active.

If all of the above conditions me met, the number of heat

stages is cfflculated; otherwise the required number of heat

stages will be set to 0.

If the PremierLink controller detemfines 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 fit least 10 minutes when HS 1 is deenergized.

On units equipped for two stages of heat, when additional heat

is needed, it may be provided by electric heat (if supplied).

When the space condition is satisfied and HSI is deenergized

the IFM stops. The fan will run continuously in the occupied

mode as required by national energy and fresh air standards.

TEMPERATURE CONTROL

w 75,

'_ 734

724-

714

I-

w 704

694

CO 68 J

TIME

...... SET POINT

-- TEMPERATURE

NOTE: PremierLink control performs smart staging of 2 stages of DX

cooling and up to 3 stages of heat.

Fig. 44 -- DX Cooling Temperature

Control Example

TEMPERATURECONTROL

D 74

_ 73

72 ......... ....................................F-----coo,SETPO, T

_- 711 \ /I-- TEMPERATURE

ow ii t v L___HEATSETPOINT

TIME

Fig. 45 -- Economizer Temperature

Control Example

SERVICE

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Tnm off accessory

heater power switch if applicable. Electrical shock could

cause pel.sonal injury.

Cleaning -- Inspect unit interior at beginning of each heat-

ing and cooling season and as operating conditions require.

Remove unit top panel and/or side panels for access to unit

intefiol:

EVAPORATOR COIL -- Clean as required with a commer-

cial coil cleanel;

NOTE: The 50TM028 unit has a mist eliminator screen

attached to the evaporator coil to prevent condensate runoff at

high wet-bulb conditions. Check periodically and clean as

necessmy.

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.

FILTERS -- Clean or replace at start of each heating and cool-

ing season, or more often if operating conditions require. Refer

to Table 1 for type and size.

NOTE: The 50TM028 unit requires industri_d grade throw-

away filters capable of withstanding face velocities up to

625 fpm. Ensure that replacement filters for the 50TM028

units are 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 re-

chmge should be four ounces less than the origimfl oil charge.

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

the replacement compressol: the extra oil will add rotor di'ag

and increase power usage. To remove this excess oil, an access

valve may be added to the lower portion of the suction line at

the inlet of the compressol: The compressor should then be mn

for 10 minutes, shut down, and the access valve opened until

no oil fows. This should be repeated twice to make sure the

proper oil level has been achieved.

FAN SHAFT BEARINGS -- The bearings are of the pillow

block type and have grease fittings. The bearing opposite the

motor end has an extended tube line so it can be lubricated

from the motor side. Lubricate the bearings twice annually.

Typical lubricants me given below:

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 motors

have permanently sealed bemings, so no field lubrication is

necesstuy.

Evaporator Fan Performance Adjustment

(Fig. 46 and 47) -- Fan motor pulleys ;u'e factory set for

speed shown in Table 1.

To change fan speeds:

1. Shut offunit power supply.

2. Ix_osen nuts on the 2 cmriage bolts in the motor mounting

base. Install jacking bolt and plate under motor base (bolt

and plate are shipped in inst_fller's packet). See Fig. 47.

Using bolt and plate, raise motor to top of slide and re-

move belt. Secure motor in this position by tightening the

nuts on the carriage bolts.

3. Ix_osen movable-pulley flange setscrew (see Fig. 46).

4. Screw movable flange towmd fixed flange to increase

speed and away from fixed flange to decrease speed. In-

creasing fan speed increases load on motol: Do not ex-

ceed maximum speed specified in Table 1.

See Table 12 for air quantity limits.

5. Set movable flange at nearest keyway of pulley hub and

tighten setscrew. (See Table 1 for speed change for each

lull turn of pulley flange.)

6. Replace and tighten belts. See Belt Tension Adjustment

section on this page.

To align fan and motor pulleys:

1. Ix)osen fan pulley setscrews.

2. Slide fan pulley along fan shaft.

3. Make anguku" alignment by loosening motor from

mounting pkite.

Evaporator Fan Service and Replacement --

The 50TM020-028 units use a fan motor mounting system that

features a slide-out motor mounting pkite. To replace or service

the motor, slide out the bracket. See Fig. 47.

1. Remove the evaporator-fan access panel and the heating

control access panel.

2. Remove the center post (located between the evaporator

fan and heating control access panels) and all screws

securing it.

3. Ix_osen nuts on the two carriage bolts in the motor mount-

ing 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 carriage bolts.

5. Remove the belt (hive.

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 pkite.

10. Disconnect wiring connections and remove the 4 mount-

ing bolts.

11. Remove the motol:

12. To install the new motol: reverse Steps 1-11.

Belt Tension Adjustment -- Toadjustbelt tension:

1. Ix_osen fan motor bolts.

2. Adjust belt tension:

a. Size 016 Units: Move motor mounting plate up or

down for proper belt tension (l/z in. deflection with

one finger).

b. Size 020-028 Units: Turn motor jacking bolt to move

motor mounting plate up or down for proper belt ten-

sion (:Vs in. deflection at midspan with one finger

[9 lb force]).

3. Tightennuts.

4. Adjustboltsandnutonmountingplatetosecuremotorin

fixedposition.

Condenser-Fan Adjustment

50TM0I 6,020,028 UNITS (Fig. 48)

1. Shut off unit power supply.

2. Remove access panel(s) closest to the fan to be adjusted.

3. Ix)osen fan hub setscrews.

4. Adjust fan height on shaft using a straightedge placed

across the fan orifice.

5. Tighten setscrews and replace panel(s).

6. Turn on unit powel:

50TM025 UNITS (Fig. 49)

1. Shut off unit power supply.

2. Remove fan top-grille assembly and loosen fan hub

screws.

3. Adjust Nn height on unit, using a straightedge placed

across the fan orifice.

4. Tighten setscrews and replace lubber hubcap to prevent

hub fiom busting to motor shaft.

5. Fill hub recess with permagum if robber hubcap is

missing.

Power Failure -- Dampers have a spring return. In event

of power failure, dampers will return to fully closed position

until power is restored. Do not manually operate damper

1710tOE

Refrigerant Charge -- Amount of refiigerant chalge

is listed on unit nameplate and in Table 1. Refer to C;uTier

GTAC II; Module 5; Charging, Recovery, Recycling, and Rec-

lamation section for charging methods and procedures. Unit

panels must be in place when unit is operating during ch;uging

procedure.

NOTE: Do not use recycled refrigerant as it may contain

contaminants.

NO CHARGE -- Use stan&ud evacuating techniques. After

evacuating system, weigh in the specified amount of refriger-

ant 0efer to Table 1).

LOW CHARGE COOLING -- Using cooling charging chmt

(see Fig. 50), 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 ensur-

ing the proper mnount 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 service valve and insulate it so that outdoor ambient

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 chart. If intel_ection point on

chart is above line, add refrigerant. If intersection point on

chart is below line, ctuefully recover some of the charge. Re-

check suction pressure as ch;uge is adjusted.

NOTE: Indoor-air cfin must be within normal operating range

of unit. All outdoor fans must be operating.

The TXV (thermostatic expansion v;dve) is set to maintain

between 15 and 20 degrees of superheat at the compressors.

The v;dves abe factory set and should not require re-adjustment.

MOISTUREMISER TM SYSTEM CHARGING -- The sys-

tem charge for units with the MoistureMiSer 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

chmge systems using the MoistureMiSer dehumidification

package, fully evacuate, recovo: and re-chtuge the system to

the nmneplate specified charge level. To check or adjust refrig-

erant chalge on systems using the MoistureMiSer dehumidifi-

cation package, chtu'ge per the sttm&u'd subcooling ch_u'ts. The

subcooler MUST be deenergized to use the chtuging charts.

The ch_uts reference a liquid pressme (psig) and temperatme 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).

SECOND BELT

ON 10 liP MOTOR (028 UNITS

ONLY)

PULLEY

BE PARALLEL

WITR BELT(S)

ENSURE PROPER

CLEARANCE BETWEEN

BELT(S) AND FAN

SUPPORT NOTCH

MOTORANDFAN

SHAFTS MUST BE

PARALLEL

MOVABLE

FLANGES

SETSCREWS_

FIXED FLANGES

SINGLE-GROOVE

Fig. 46- Evaporator-Fan Pulley Alignment

and Adjustment

FAN PULLEY ° CENTER POST

BELT_ MOTOR PULLEY

MOTOR PLATE

R_MOTOR

MOUNTING

PLATE

SEE NOTE

J'M OTO R 2U ppo R_ _l_!r !"1_i'_ TM

CHANNEL JACKING BOLT

NOTE: A 3V2-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. 47 -- Evaporator-Fan Motor Section

._ r , i ........

t) ) oo +o:o=

NOTE: Dimensions are in inches).

Fig. 48 -- Condenser-Fan Adjustment,

50TM016,020,028

RAIN

SHIELD

NOTE: Dimensions are in inches.

Fig. 49 -- Condenser-Fan Adjustment,

50TM025

BOTH CIRCUITS

ALL OUTDOOR FANS MUST BE OPERATING

50 100 150 200 250 300 350 400

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Fig. 50 -- Cooling Charging Chart

Filter Drier -- Replace whenever refiigerant system is ex-

posed to atmosphere.

Protective Devices

COMPRESSOR PROTECTION

Overcurrent -- Each compressor has internal line break motor

protection.

Crankcase Heater -- All units are equipped with a 70-watt

crankcase heater to prevent absorption of liquid refrigerant by

oil in the crankcase when the compressor is idle. The crankcase

heater is energized whenever there is a main power to the unit

and the compressor is not energized.

I IMPORTANT: After prolonged shutdown or servicing,

energize the crankcase heaters for 24 hours before starting

the compressors.

Compressor Lockout iIf any of the safeties (high-pressure.

low-pressure, freeze protection thermostat, compressor internal

flierlnostat) trip, or if there is loss of power to the compressors,

die CLO (complessor lockout) will lock the compressors off.

To reset, manually move the therlnostat setting.

EVAPORATOR FAN MOTOR PROTECTION i A manu-

al 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

correct it before lesetting 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 overtemperatule

switch activates, that refrigerant circuit will be automatically

locked out by the CLO. To reset, manually move the thermo-

stat setting.

FREEZE PROTECTION THERMOSTAT (FPT) i An FPT

is located on the top and bottom of die evaporator coil. It de-

tects frost build-up and turns off the compressor, allowing the

coil to cleal: Once the frost has melted, the compressor can be

leenergized.

Relief Devices -- All units have relief devices to protect

against damage from excessive plessures (e.g., fire). These de-

vices protect the high and low side.

Control Circuit, 24-V -- This control circuit is protect-

ed against overcunent by a 3.2-amp circuit breaker Breaker

can be reset. [f it trips, determine cause of trouble before

resetting. See Fig. 51 and 52 for typical wiring.

Replacement Parts -- A complete list of replacement

parts may be obtained from any Carrier distributor upon

request.

Diagnostic LEDs -- qn_e unit control bomds have LEDs

for diagnostic purpose. Refer to Troubleshooting section on

page 43.

Optional Hinged Access Doors -- When the optional

service package is ordered or the if the hinged access doors

option is ordered, the unit will be provided with external and

internal hinged access doors to facilitate service.

Four external hinged access doors are provided on size 016-

025 units. Two external hinged doors ;ue provided on size 028

units. All external doors ale provided wifli 2 huge V4 turn hitch-

es with folding bail-type handles. (Complessor access doors

have one hitch.) A single door is provided for filter and drive

access. One door is provided for control box access. The con-

trol box access door is interlocked with the non-fused discon-

nect which must be in the OFF position to open the dool: On

size 016-025 units, two doors are provided 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 1/4turn latches with folding bail-type handles. This

door must be opened prior to opening the diive access door

The drive access door is shipped with 2 sheet metal screws

holding the door closed. Upon initial opening of the dool: these

screws may be removed and discarded. The door is fllen held

shut by the filter access dook which closes over it.

2081230V

TM016.020

2081230V

017 TON

ELECTRIC HEAT

208/240v 200/230V

AMPS KW

A 71.3/823 25.71342

B1171135 42.21561

C 156/180 56,2/74,8

-BL _C_

: -BL

_c_

_BL

, Y[

IHc_

U "

ELECTRIC HEAT OPTION SEE ELECTRIC

HEAT CHARY

/, (B O_LY)_

,{A _ C ONLY)

I I

BL_ at_

SUPPLY" Y[L _L CC_

II I I L°"-_

1 1 ,_ I _ _--_-- _---_'<_-_

BL_ CAP2 y[L_) OFW_

o, :,: ....

m_ ore _, Bt_

_L_ _

_ic_ :LsELECIRTIC _BR_

I B_ BR_ > TRA_

RE_ TO ECONOMIIZR OPIIONIACCgSSORY

..... _'_;_gt ........... Bp_ _. TO ECONOMIZER OPTIONIACCESSORY

-<'I--

REVIS]O.RZCOR_ L __ _ ,_._ |

P^_l _uwB[r _ vlo _vio

50HJ503171 60 oPtmN _ .coy _eL-<<-- _t j

SHY 2OF 3

Fig. 51 -- Typical Wiring Schematic (50TM016,020 208/230 VShown)

COMPONENT ARRANGEMENT

CONTROLBOX 0

BL_

PL1-R

_111 I--

OISCONNECTPERHElm _

m m

F _{_cT_T_ci_ 6_,_T_" q

iEO_O i

!;2

LF:_.P,_....... J

{A)

zv 10v

to MAI_

CONYROL

BOX

PLI

F _¢ii_c _- G_Ti_i" q

i° °__o_

LFLI._.FLO .... j

iE]E]E]E]

: o o o o o o o

) o_ -oi

Fig. 52 -- Typical Component Arrangement (50TM016,020 Shown)

LEGEND AND NOTES FOR FIG 51 AND 52

LEGEND

AHA -- Adjustable, Heat Anticipator PL -- Plug Assembly

C -- Contactor, Compressor PRI -- Primary

CAP -- Capacitor QT -- Quadruple Terminal

CB -- Circuit Breaker RAT -- Return Air Temperature Sensor

CC -- Cooling Compensator SW -- Switch

CH -- Crankcase Heater TB -- Terminal Block

CLO -- Compressor Lockout TC -- Thermostat Cooling

COMP -- Compressor Motor TH -- Thermostat Heating

CR -- Control Relay TRAN -- Transformer

DM -- Damper Motor

DU -- Dummy Terminal Q Terminal (Marked)

EQUIP -- Equipment O Terminal (Unmarked)

FL -- Filament

FPT -- Freeze Protection Thermostat [_ Terminal Block

FU -- Fuse

GND -- Ground • Splice

HC -- Heater Contactor Factory Wiring

HPS -- High-Pressure Switch

HTR -- Heater E mE Field Wiring

IAQ -- Indoor Air Quality Sensor Option/Accessory Wiring

IFC -- Indoor Fan Contactor

IFCB -- Indoor Fan Circuit Breaker _ To indicate common potential only;

IFM -- Indoor Fan Motor not to represent wiring.

IFR -- Indoor Fan Relay Economizer Motor

L -- Light

LOR -- Lockout Relay _ Remote Pot Field Accessory

LPS -- Low-Pressure Switch OAT Sensor

LS -- Limit Switch

NEC -- National Electrical Code _ Disch Air Sensor

OAT -- Outdoor Air Temperature Sensor

OCCUP -- Occupancy Sensor RAT Accessory Sensor

OFC -- Outdoor Fan Contactor

OFM -- Outdoor Fan Motor Low Ambient Lockout Switch

OP -- Overcurrent Protection

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 number signifies a normally closed contact. Plain (no line) number signifies a nor-

mally 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 min-

imum position POT to the minimum position.

TROUBLESHOOTING

Unit Troubleshooting -- Refer to Tables 21 and 22 for

troubleshooting details.

EconoMi$erlV Troubleshooting-- See Table 23

for EconoMi$erIV logic.

A fiJnctional view of the EconoMiSer is shown in Fig. 53.

Typical settings, sensor ranges, and jumper positions me also

shown. An EconoMi$erIV simulator program is available flom

Cartier to help with EconoMiSerIV tr;fining and troubleshooting.

ECONOMI$ERIV 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-ohm

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 Pl.

3. Jumper P to Pl.

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. If 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 fiJlly CW

Iclockwise).

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. Place 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 EconoMiSerIV 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 EconoMiSerlV 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 battery to 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

lemain 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 normal

after completing troubleshooting.

DCV MINIMUM AND MAXIMUM POSITION -- To check

the DCV minimum and maximum position:

1. Make sure EconoMiSerIV preparation procedure has

been performed.

2. Connect a 9-v battely to 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

&ive 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 EconoMiSerlV 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

potentiometels to previous settings.

5. Remove 620-olun resistor from terminals SR and +.

6. Remove 1.2 kilo-olnn checkout resistor from termimds So

and +. If used, reconnect sensor from temfin_ds So and +.

7. Remove jumper from TR to N.

8. Remove jumper from TR to 1.

9. Remove 5.6 kilo-ohln resistor from T and TI. Reconnect

wires at T and TI.

10. Remove jumper from P to PI. Reconnect device at P and

PI.

11. Apply power (24 vac) to terminals TR and TRI.

Table 21 -- MoistureMi$er TM Dehumidification Subcooler Service Analysis

PROBLEM

Subcooler Will Not Energize

Subcooler Will Not Deenergize

Low System Capacity

CAUSE

No power to subcooler control transformer.

No power from subceoler control transformer to liquid

line three-way valve.

Liquid line three-way valve will not operate.

Liquid Line three-way valve will not close.

Low refrigerant charge or frosted coil.

REMEDY

Check power source. Ensure all wire connections

are tight.

1. Fuse open; check fuse. Ensure continuity of wiring,

2. Subcooler 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,

1. Solenoid coil defective; replace.

2. Solenoid valve stuckclosed; replace.

Valve is stuck open; replace.

1. Check charge amount. See system charging

section.

2. Evaporator coil frosted; check and replace

subceeler control low-pressure switch if necessary.

Table 22 -- Cooling Service Analysis

PROBLEM CAUSE REMEDY

Compressor and Condenser Power failure, Call power company.

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 Start Faulty wiring or loose connections in compressor circuit, Check wiring and repair or replace,

but Condenser Fan Runs. Compressor motor burned out, seized, or internal overload open. Determine cause, Replace compressor,

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 condenser-fan 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 Pressure. Dirty air filter, Replace filter.

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 Pressure. High heat load, Check for source and eliminate,

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 Low. Dirty air filter, Replace filter.

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 23 -- 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

*For single enthalpy

enthalpy to the ABCD

1-Power at N terminal determines Occupied/Unoccupied

24 Vac (Occupied), no power (Unoccupied).

**Modulation is based on the supply air sensor signal.

ttModulation is based on the DCV signal.

OUTPUTS

N TerminaH-

Occupied Unoccupied

Damper

Minimum position Closed

Modulating** (between min.

3osition and full-open)

Minimum position

Modulatingl-t (between min.

3osition and DCV maximum)

Modulating***

Modulating** (between

closed and full-open)

Closed

Modulatingtl- (between

closed and DCV

maximum)

Modulatingl-l-t

control, the module compares outdoor

set point. setting:

***Modulation is based on the greater of DCV and supply air sensor

signals, between minimum position and either maximum position

(DCV) or fully open (supply air signal).

tttModulation is based on the greater of DCV and supply air sen-

sor signals, between closed and either maximum position (DCV)

or fully open (supply air signal).

Fig. 53 -- EconoMi$erlV Functional View

Air quantity limits 30

Carrier Comfort Network0) 16

ChaNingchart, refrigerant 39

Clearance 4-7

CO2 sensor

Configuration 27

Settings 26, 27

Compressor

Lubrication 37

Mounting 30

Rotation 30

Condensate drain

Cleaning .;7

Location 9, 10

Condenser coil 8

Cleaning 37

Condenser fan 8

Adjustment 3& 39

Control circuit

Wiring 10

Convenience outlet 13

Demand control ventilation 26

Dehumidification 27

Dimensions 2, 3, 5-7

Ductwork 9

EconoMi$erIV 22-27

Control mode 24

Controller wiring 23

Damper nlovement 26

Demand ventilation control 26

Troubleshooting 43, 45

Usage 24

Wiring 23

EconoMi$er2 22, 23

Electrical connections 10

Electricaldata 11, 12

Enthalpy changeover set points 25

Evaporator coil 8

Cleaning 37

Evaporator fan motor

Lubrication .;7

Motor data 34

Performance 31-33

Pulley adjustment 3Z .;8

Pulley setting 8, 34

Speed 34

Filter

Cleaning .;7

Size 8

Freeze protection thermostat 8, 39

Heat anticipator settings 13

High-pressure switch 8, 39

Horizontal adapter roof curb 4

Humidistat 28

Indoor air quality sensor 16

Low-pressure switch & .;9

Manual outdoor air damper 13

MoistumMiSer TM

dehumidification 28, 29, 38, 44

Motormasterq_) control 14, 15

Mounting

Compressor 30

Unit 4

Non-fused disconnect 13

Operating limits 15

Operating sequence 35, 36

Cooling 35

EconoMi$erlV 35

EconoMi$er2 with

PremierLink control 3.5,.;6

Heating 35

Outdoor air hood 13, 14

Outdoor air temperature sensor 16, 22

INDEX

Outdoor air inlet screens

Cleaning 37

Dimensions 8

Physical data 8

Power supply 10

Wiring 10

PremierLink TM controls 16-19

Pressure, drop

Economizer 33

Electric heat 33

MoistureMiSer 33

Pressure switches

High pressure 8

Low pressure 8

Refrigerant

Charge 38

Type 8

Refrigerant service ports 30

Replacement parts .;9

Return air filter 8,30

Return air temperature sensor 25

Rigging unit 4

Roof curb

Assembly 1

Dimensions 2, 3

Leveling tolerances 2-4

Safety considerations 1

Service 37-42

Start-up .;0-36

Start-up checklist CL-1

Supply-air temperature sensor 16,22

Thermostat 10

Troubleshooting 43-45

Weight

Corner 5-7

Economizer 5-8

Maximum 4

Unit 5-8

Wind baffle 14,15

Wiring

Differentialenthalpy control 21

EconoMiSerlV 23

EconoMiSer2 23

Power connections 10

PremierLink 18

Thermostat 10

Unit 40, 41

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

Catalog No. 04-53500009-01 Printed in U.S.A. Form 50TM-4SI Pg 46 4-06 Replaces: 50TM-3SI

MODEL NO.:

DATE:

START-UP CHECKLIST

SERIAL NO.:

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 ECONOMIZER HOOD

[] VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

[] VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

[] 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

LI-L2 L2-L3 L3-LI

LI L2 L3

SUPPLY FAN AMPS EXHAUST FAN AMPS

ELECTRIC HEAT AMPS (IF SO EQUIPPED) LI L2 L3

TEMPERATU RES

OUTDOOR-AIR TEMPERATURE F DB (Dry-Bulb)

RETURN-AIR TEMPERATURE F DB

COOLING SUPPLY AIR IF

ELECTRIC HEAT SUPPLY AIR (IF SO EQUIPPED)_ F

F WB (Wet-Bulb)

PRESSURES

REFRIGERANT SUCTION CIRCUIT NO. I PSIG CIRCUIT NO. 2

REFRIGERANT DISCHARGE CIRCUIT NO. 1 PSIG CIRCUIT NO. 2

[] VERIFY REFRIGERANT CHARGE USING CHARGING CHART ON PAGE 39.

PSIG

GENERAL

[] ECONOMIZER MINIMUM VENT AND CHANGEOVER SETI'INGS TO JOB REQUIREMENTS

[] VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES

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. 04-53500009-01 Printed in U.S,A. Form 50TM-4SI Pg CL-1 4-06 Replaces: 50TM-3Sl

Tab 1b 16b

I--

I-

CARRIER Package Units(both Units Combined) Manual L0606347

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