CARRIER Package Units(both Units Combined) Manual L0606344

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

50HJ015,017

Single-Package Rooftop Units

Electric Cooling with Electric Heat Option

Installation, Start-Up and

Service Instructions

CONTENTS

Page

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

INSTALLATION ................................ 1-27

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 ............... 4

Step 4 -- Make Unit Duct Connections ........... 7

Step 5 -- Trap Condensate Drain ................. 7

Step 6 -- Make Electrical Connections ........... 8

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• OPTIONAL NON-FUSED DISCONNECT

• OPTIONAL CONVENIENCE OUTLET

Step 7-- Make Outdoor-Air Inlet

Adjustments .................................... 10

• MANUAL OUTDOOR-AIR DAMPER

Step 8-- Install Outdoor-Air Hood .............. 10

Step 9 -- Install All Accessories ................. 11

• MOTORMASTER® I CONTROL INSTALLATION

Step 10 -- Adjust Factory-Installed Options ..... 12

• PREMIERLINK TM CONTROL

• ENTHALPY SWITCH/RECEIVER

• OUTDOOR ENTHALPY CONTROL

• DIFFERENTIAL ENTHALPY CONTROL

• ENTHALPY SENSORS AND CONTROL

• OPTIONAL ECONOMISERIV AND ECONOMISER2

• ECONOMISERIV STANDARD SENSORS

• ECONOMISERIV CONTROL MODES

Step 11 -- Install Humidistat for

Optional MoistureMi$er TM Package ............ 25

START-UP ....................................... 28-34

Unit Preparation ................................. 28

Operating Sequence ............................ 33

SERVICE ........................................ 35-40

TROUBLESHOOTING ........................... 41-44

INDEX .............................................. 45

START-UP CHECKLIST ......................... CL-1

SAFETY CONSIDERATIONS

Installation and selwicing of air-conditioning equipment can

be hazardous due to system pressure and electric_d compo-

nents. Only trained and qualified service personnel should in-

stall, repaiL or service ai>conditioning equipment.

Untrained personnel can perform basic maintenance func-

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

operations should be performed by trained service personnel.

When working on air-conditioning equipment, observe

precautions 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.

IMPORTANT: Units have high mnbient temperature oper- ]

ating limits. If limits are exceeded, the unit will automati- I

cally lock the compressor out of operation. Manual reset

will be required to restart the compressor:

INSTALLATION

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

file claim with transportation agency.

Step 1 -- Provide Unit Support

ROOF CURB -- Asselnble and install accessory roof curb or

horizontal supply roof curb in accordance with instructions

shipped with the accesso q. Accesso Uroof curb and horizontal

supply roof curb and information required to field fabricate a

roof curb or horizont_dsupply roof curb gueshown in Fig. 1 and

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

horizontal supply roof curb is critical for a leakproof se_d.

Install gasket supplied with the roof curb or horizont_d sup-

ply roof curb as shown in Fig, 1. hnproperly applied gasket

can result in air leaks and poor unit performance.

Roof curb must be level. This is necessary to permit unit

drain to function properly. Unit leveling tolerance is + ]/]_ in.

per linear ft in any direction. Refer to Accessory Roof Curb or

Horizontal Supply Roof Curb Installation Instructions for addi-

tional information as required.

ALTERNATE UNIT SUPPORT -- When the curb or a&tpter

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

adapter support area. [f 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.

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

Catalog No. 04-53500012-01 Printed in U.S.A. Form 50HJ-29SI Pg 1 3-06 Replaces: 50HJ-25SI

CURB

PKG.NO. REF. HEIGHT

CRRFCURBO10A00 1"-2" (305)

CRRFCURB011A00 2"-0" (610)

CRRFCURB012A00 2'-0" (610)

DESCRIPTION

Standard Curb 14" High

Standard Curb for Units

Requiring High Installation

Side Supply and Return

Curb for H gh neta aton

CO'_P_

BC1.

B" 2B//B °

UPPLY" rS'Nd

(/rD!)

SUPPLY RETURN

OPENING

CURB

(349) L

1"-7 13/i8 "_

(BOA)

MITERED CORNERS_

(T5P ONLY)

/PLAN VIEW 5F ROOF CURB

jOUTL[NE OF UNIT

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1" thick neoprene coated 11/2 Ib density.

3. Dimensions in ( ) are in millimeters.

E_ Direction of airflow.

4.

5. Roof curb: 16 ga. (VA03-56) stl.

6. A 90 degree elbow must be installed on the supply ductwork

below the unit discharge for units equipped with electric heaters.

7. To prevent the hazard of stagnant water build-up in the drain pan of the

indoor section, unit can only be pitched as shown.

5" r i CONSS'R i

I I"'l B' co PRE

EN /

A ........

t ! C5ND NSA RA[N_ CONOENB R

dEEP TH]5 ARA CL AR FOR AN

POWER (GAS _NTRY FOR GAB :RED ROOF 0#'5) COH_._5_R B

J:_ (s2> DIMENSIONS* (degrees and inches)

ATTACH DUCT TO ROOF CURB

UNIT

ALL

Deg. A in. Deg. B in.

.28 .45 .28 .43

UNI1 LEVELING OLERANCES

• Fr-ora edge o_ n t to ho_ zo:,toL,

TYP, 4 PLC5

0'i

0"_6

B" 2 !14"

5' 7 //1 _-" /(BBB)

{170B_ -/"

1" 8" .

457 LO' .2/: / /2 (CRRFC RB0/2AO0 ON Y}

(CR C RBO!2AOO ONLY) {B_)

_0" 1 1/4"

(32) GA5KET

(SUPPLIED WITH CURB)

FIELD 5UPPL[EB

_COUNTER FLASHING

(FIELD SUPPLIED)

CANT STRIP

_ilELD SUPPLIED)

_ROOFING MATERIAL

/(FIELD SUPPLIED)

\\\RIGID INBULATION

(FIELD SUPPLIED)

Fig. 1 -- Roof Curb Details

25% VENT AIR//

ECONOMIZER

HOOD _.

AIR

OUT

HORIZONTALSUPPLY _

CURB (CRRFCURB013A00)

I

i

I

E

f//

\

TRANSITION DUCT

NOTE: CRRFCURB013A00 is a fully factory preassembled horizon-

tal adapter and includes an insulated transition duct. The pressure

drop through the adapter curb is negligible.

For horizontal return applications: The power exhaust and baro-

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

T

14 3/4"

6"

FULLY INSULATED

SUPPLY PLENUM

/_ 2"X 1/4 f_ 1" INSULATION

/SUPPORT TYR /1 1/2 # DENSITY,

/STITCH WELDED/STICK PINNED & GLUED

_-_ 12,,W __-_-___ "P'21_3

SEAM PANELS

ACCESSORY CURB

PACKAGE NO. HEIGHT DESCRIPTION

1'-1 1" Pre-Assembled, Horizontal

CRRFCURB013A00 (584 Adapter Roof Curb

Fig. 2 -- Horizontal Supply/Return Adapter Installation

Step 2 -- Rig and Place Unit -- Keep unit upright,

and do not &op. Use spreader bal_ over unit to prevent sling or

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

Level by using unit frame as a reference; leveling tolerance is

_+1/16in. per line;u" fl in any direction. See Fig. 3 for additional

information. Unit weight is shown in Table 1.

Four liming holes ale provided in ends of unit base r;fils 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).

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

inlets near exhaust vents or other sources of contaminated ail_

Although unit is weatherproof, guard against water fiom

higher level runoff and overhangs.

ROOF MOUNT -- Check building codes for weight distribu-

tion requirements.

Step 3 -- Field Fabricate Ductwork -- Secure _dl

ducts to building structure. Use flexible duct connectors be-

tween unit and ducts as required. Insulate and weatherproof all

external ductwork, joints, and roof openings with counter

flashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be in-

sulated and covered with a vapor barriel:

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

for the that 24 in. of ductwork.

Outlet grilles must not lie directly below unit discharge.

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

to comply with UL (Underwritel_ Laboratories) codes for use

with electric heat.

SEE

"DETAIL

10'-0"

(3048)

"DETAILA"

RIGGINGHOOK

3'-71/2"

(t 105)

UNITBASERAIL

MAXIMUM DIMENSIONS

UNIT SHIPPING WEIGHT A B

50HJ Ib ] kg ft-in. ] mm ft-in, mm

015 1625 I737 6-11V2 I2121 4-0 1219

017 1700 771 6-11V2 2121 3-10 1168

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Refer to Table 1 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.

6. Weights given are for aluminum evaporator and condenser coil

plate fins, Weights include electric heat.

7. Add 75 Ib (34 kg) for crating on 50HJ015 and 017 units,

8. Add 150 Ib (68 kg) for copper condenser coil, Add 280 Ib

(127 kg) for copper condenser and evaporator coils.

For vertical supply and return units, tools or parts could

drop into ductwork and cause an injury. Install 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 inst_dled

to prevent objects from falling into the conditioned space.

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

elbow.

All panels must be in place when rigging.

Fig. 3 -- Rigging Details

TYP (4) P,LC5 _CORNE8 D

o-&p _1!

0"-8 I/B _

(206)

B

[

5"-7 3/16"

(1707)

OUTDOOR

SECTION

1 3/8" DIA. DRAIN HOLE

6"-11 1/2" (2121)

_1"=7 13115" 1"-4 5/15 _ 1'=4 9115"

I

i

i

i

i

i

i

SUPP[

Am

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

i

(788)

RETURN

AIR

STD UNIT ECONOMIZER

UNIT WEIGHT WEIGHT

Lb IKg Lb IKg

50HJ015 1575 714 90 41

50HJ017 1650 748 90 41

7_CORNER A

_0"=3 15/16" -i" 0"-5 15/15"

(108) 0 (33)5 6 (151)

5"-11 7/E

(1825)

CO.#ERCO%NERCO.oN.CO%NER

•bIKgI,bI KgI,bI*gI,b I*g

4o7165137511701383117414101186

375 170 375 170 449 204 452 205

•50 DIA HOLE ['-12'00

TYPICAL__I 231

_; 1 1/4" DIA

7"-2 1/8" [CAL

(2187) TYPICAL 4 CORNERS

_\_/, L _ _

0._ 03/18- i z0._731 -,2

(_L_L L:- --- _ /I I I_S-. , (157)

//

/L__ _ .

_.A K._, "_ 1,_ O'- 27 22) (THRU CURB,24V)

(s..NRUCUR_O*SCONN.)/ °0) _ Z#S ..... _ o.-3i,8,

COR_ERC 13,_-DIACONCENTRIC_,o._ '_ 50_;is,18_OORRERB(_B)

(35) (THRU CURB POWER)

FILTERS

ACCESS FAR SIDE

.) ?

// - / ///

A_ CO]L

BOX

ACCE55 25_; AIR OR

_I "-10 5118" ECONOMIZER HOOD

(567)

1"-6 3/8" 1

-314" FPT DRAIN CONNECTION

(27) FAR SIDE ONLY 1"-3/18"_"

(310)

(76)

3"-9"

(1143)

(51)

EXHAU5T

(ACCESSORY ONLY)

50HJ017 ONLY

DIM A

ft-in. I mm

3-5 1039

3-2 963

DIM BDIM C

ft-in. Im m I ft-in. Imm

3-5 1054 I1-1o 1559

3-7 1092 1-10 559

NOTES:

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in ( ) are in millimeters.

3. _ Center of Gravity.

E_ Direction of airflow.

4.

5. Ductwork to be attached to accessory roof curb only.

6. Minimum clearance:

• Rear: 7"-0" (2134) for coil removal. This dimension can be reduced to

4'-0" (1219) if conditions permit coil removal from the top.

• Left side: 4"-0" (1219) for proper condenser coil airflow.

• Front: 4'-0" (1219) for control box access.

• Right side: 4"-0" (1219) for proper operation of damper and power

exhaust if so equipped•

• Top: 6'@" (1829) to assure proper condenser fan operation•

• Local codes or jurisdiction may prevail•

7. With the exception of clearance for the condenser coil and the

damper/power exhaust as stated in Note #6, a removable fence or

barricade requires no clearance.

8. Dimensions are from outside of corner post. Allow O'-S/m" (8) on each

side for top cover drip edge.

9. A 90-degree elbow must be installed on the supply ductwork

below the unit discharge for units equipped with electric heaters.

0"-2"(51) 3" g 718 DIA CONCENTRIC K.O.

r-(7B) g (22) (FIELD ROWER)

-- 5"-11 3/8"

(1813) ECONOMIZER OPENING

(?B?)

PER OPEN[NG

/---1 "1

['_LJ0:oSL'S:)'°:::F--

VIEW Z=Z

BAROMETRICRELIEF/POWEREXHAUST

(ACCESSORYONLY)

t0"qf3"

. _3 5,B',13,8-o. CO.OENTRIO_0 _1;_ (7B)

(92) g (35) (FIELD POWER) *"

0"-4"

7/8 DIA K,O. (CONTROL) _1(31_4" D A HO

(22) LE _ 1(102)

5"-6" _ SECTION A-A

(1576)

Fig. 4 -- Base Unit Dimensions, 50HJ015, 017

Table1 -- Physical Data

UNIT 50HJ

UNIT VOLTAGE

NOMINAL CAPACITY (tons)

OPERATING WEIGHT (Ib)

Unit

AI/AI*

AI/Cu*

Cu/Cu*

Economizer

Roof Curbt

MoistureMi$er TM Dehumidification Package

COMPRESSOR

Quantity,.,Model (Ckt 1, Ckt 2)

Number of Refrigerant Circuits

Crankcase Heater Watts

Loading (% of Full Capacity)

Oil (oz) (Ckt t, Ckt 2)

REFRIGERANT TYPE

Expansion Device

Operating Charge (Ib)**

Circuit 1

Circuit 2

575 208/230

1575 1650

1725 1800

1855 1930

90 90

200 200

40 40

2-.ZR72KC 1-.ZR94KC, 1-.ZR72KC

2 2

70 70

0,53, 100 O,60, 100

60, 60 85, 60

R-22

TXV

20.7 I 19.5

13.4 13.45

015

208/230 1460 I

12

017

146o1575

15

CONDENSER COIL Cross-Hatched a/s-in. Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or

Copper Plate Fins

Rows,..Fins/in, 4...15 I 4_.15

Total Face Area (sq ft) 21.7 I 21.7

CONDENSER FAN Propeller Type

Nominal Cfm 10,500 I 10,500

Quantity,.,Diameter (in,) 3...22 I 3_.22

Motor Hp..,Rpm 1/2._1050 V2-.1050

Watts Input (Total) 1100 1100

Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face

Split

4...15 I 4...15

17.5 17.5

Centrifugal Type

EVAPORATOR COIL

Rows,..Finslin,

Total Face Area (sq ft)

EVAPORATOR FAN

Quantity,.,Size (in,)

Type Drive

Nominal Cfm

Std Motor Hp

Opt Motor Hp

Motor Nominal Rpm

Std Maximum Continuous Bhp

Opt Maximum Continuous Bhp

Motor Frame Size

Fan Rpm Range

Motor Bearing Type

Maximum Allowable Rpm

Motor Pulley Pitch Dia.

Nominal Motor Shaft Diameter (in.)

Fan Pulley Pitch Diameter (in.)

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

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)

2.9

3.7

3.13

4.26

895-1147

1040-1315

2.-12 x 12

Belt

5200 I

1725 I

56H I

Ball

1,550

3.1/4.1

3.7/4.7

7&

6.0

6.0

13/16

1-.BX.-45

1-.BX.-45

14.5-16.0

45

45

6

3.5

987

1155

3.0

N/A

3.38

N/A

895-1147

N/A

3.1/4.1

N/A

7/8

6.0

6.0

13/16

1.-BX-.45

1.-BX-.45

14.5-16.0

45

N/A

6

3.5

1177

N/A

Low=Medium Static

High Static

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._20x20x 1

RETURN-AIR FILTERS Throwaway

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

4._16x20x2

LEGEND

AI -- Aluminum

Bhp -- Brake Horsepower

Cu -- Copper

TXV -- Thermostatic Expansion Valve

2._12 x 12

Belt

6000

5

1745

6.13

N/A

184T

873-1021

1025-1200

Ball

1,550

4,9/5.9

4,9/5.9

1V8

9.4

8.0

17/16

1.-BX...50

1.-BX...48

13.3-14.8

37

44

4it

3.5

965

1134

*Evaporator coil fin material/condenser coil fin material.

tWeight of 14-in. roof curb.

**Circuit 1 uses the lower portion of condenser coil and lower portion of evap-

orator coils, and Circuit 2 uses the upper portion of both coils.

ttDue to belt and pulley style, pulley cannot be set from 0 to 11/2 turns open.

Step 4 -- Make Unit Duct Connections -- Unit is

shipped for thru-the-bottom duct connections. Ductwork open-

ings are shown in Fig. 5. Field-fabricated concentric ductwork

may be connected as shown in Fig. 6 and 7. Attach all

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

tion instructions shipped with accessory roof curb for more

information.

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

and 8 for drain location. Plug is provided in &'ain hole and

must be removed when unit is opelating. One 3/4-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 3/4-in. diameter pipe nipple are coupled to stan&trd

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

holes in unit base rails (see Fig. 9). A trap at least 4-in. deep

must be used.

/EVAPORATOR-

FAN MOTOR

/

/

BAFFLE

Shaded area indicates block-off panels.

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

ceiling diffuser.

Concentric ducts may only be installed on units without electric

heat. Personal injury or unit damage may result.

Fig. 7 -- Concentric Duct Details

1#cb A,R

_/OUT

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

in water leak.

Fig. 5 -- Air Distribution -- Thru-the-Bottom

(50HJ017 Shown)

EVAPORATOR-

FAN MOTOR

SEE

NOTE

AIR OUT AIR IN AIR OUT

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

water leak.

Fig. 6 -- Concentric Duct Air Distribution

(50HJ017 Shown)

INDOOR FAN MOTOR ACCESS

FILTER

ACCESS

I

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

CONNECTION DRAIN HOLE

Fig. 8 -- Condensate Drain Details

(50HJ015 Shown)

(HALF CO_ L_

8 I12-IN. (FIELD- _"'] I

SUPPLIED) NIPPLE

Fig. 9 -- 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). Electric_d heater data is shown in Table 3.

All field wiring must comply with NEC and local require-

ments.

Route power lines through conhol box access panel or unit

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

gram and Fig. 10.

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 cunent

must be b_danced within 10%.

The correct power phasing is critical in the operation of the

scroll compressors. An inconect phasing will cause the

compressor to rotate in the wrong direction. This may lead

to premature compressor failure.

Unit failure as a result of operation on improper line voltage

or excessive phase imbalance constitutes abuse and may cause

dmnage to electrical components.

FIELD CONTROL WIRING -- Install a CguTier-approved

accessory fllermostat assembly according to the installation in-

structions included wifll the accessory. Locate thermostat as-

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

age temperature.

Route thermostat cable or equiv_dent single leads of colored

wire fi_)m subbase terminals through conduit in unit to low-

voltage connections as shown on unit label wiring diagram and

in Fig. 11.

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

Wire Gage) insulated wire (35 C minimum). For 50 to 75 It,

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

75 It, use no. 14 AWG insulated wire (35 C minimum). All

wire larger 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 4. Settings

may be changed slightly to provide a greater degree of comfort

for a particuku inst_dlation.

Refer to accessory remote control instructions as lequired.

------'I TBI

I _

I FIELD I f---I F'LM

L ..... POWER I _

.......

1

r

, !

lEQUIP GNO

I

L....................

TB1 MAXIMUM WIRE SIZE

UNIT

50HJ

All

208/230

350 kcmil

LEGEND

EQUIP-- Equipment

GND -- Ground

kcmil -- Thousand Circular Mils

NEC -- National Electrical Code

TB -- Terminal Block

Fig.

VOLTAGE

2/0 2/0

10- Field Power Wiring Connections

THERMOSTAT ASSEMBLY

R E_J U M_]R I_ I_ I_ [_ [_

m m

C3 _ Z Z I--

LU _' Z CC 0 3_, _

cc m o_ 0 _ m m 5:

UNIT LOW-VOLTAGE CONNECTIONS

Fig. 11 -- Field Control Thermostat Wiring

Table 2 -- Electrical Data

UNIT

50HJ

015

(Standard

IFM)

015

(Optional

IFM)

017

NOMINAL VOLTAGE COMPRESSOR OFM IFM POWER ELECTRIC

VOLTAGE RANGE No. 1 No, 2 EXHAUST HEAT*

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

208/230 187 253 20.7 156 20.7 156 3 0.5 1.7 2.9

460 414 506 10 75 10 75 3 0.8 0.8 2.9 4.2

575 518 633 8.2 54 8.2 54 3 0.5 0.75 3.0 3.9

POWER

SUPPLY

MCA MOCPt

-- -- 60/60 80/80

4.6 18.8 -- -- 65/65 80/80

14/19 39/45 60/67 70/70

8.8/ 4.6 18.8 14/19 39/48 66/73 80/80

8.4 26/34 71/82 100/113 100/125

4.6 18.8 26/34 71/82 106/119 110/125

42/56"* 117/135 157/146 175/175

4.6 18.8 42/56"* 117/135 163/151 175/175

-- -- 29 35

2.3 6.0 -- -- 31 40

15 18 29 35

2.3 6.0 15 18 31 40

32 39 54 60

2.3 6.0 32 39 57 60

55** 66 71 80

2,3 6,0 55** 66 74 80

-- -- 25 30

2.1 4.8 -- -- 27 30

37** 37 51

2.1 4.8 37** 37 54

208/230 187 253 20.7 156 20.7 156 3 0.5 1.7 3.7

60

60

-- -- 62/63 80/80

4.6 18.8 -- -- 67/67 80/80

14/19 39/45 62/70 80/80

10.5/ 4.6 18.8 14/19 39/45 68/76 80/80

11.0 26/34 71/82 102/116 110/125

4.6 18.8 26/34 71/82 108/122 110/125

42/56"* 117/135 189/149 178/175

4.6 18.8 42/56"* 117/135 165/155 175/175

460 414 506 10 75 10 75 3 0.5 0.8 3.7 4.8

2.3 6.0 --

15

2.3 6.0 15

32

2.3 6.0 32

55**

2.3 6.0 55**

-- 30 35

-- 32 40

18 30 35

18 32 40

39 55 60

39 58 60

66 72 80

66 75 80

-- -- 82/82 110/110

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

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

15.8/ 4.6 18.8 26/34 71/82 114/128 125/150

15.8 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

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

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

-- -- 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** 96 106 128

2.3 6.0 80** 96 109 125

-- -- 31 40

2.1 4.8 -- -- 34 40

LEGEND

FLA -- Full Load Amps

HACR -- Heating, Air Conditioning and

Refrigeration

IFM -- Indoor (Evaporator) Fan Motor

LRA -- Locked Rotor Amps

MCA -- Minimum Circuit Amps

MOCP -- Maximum Overcurrent Protection

NEC -- National Electrical Code

OPM -- Outdoor (Condenser) Fan Motor

RLA -- Rated Load Amps

c t u,

_ISTE_

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

Aac BC = 464 v

(_ AC =455 v

Average Voltage = 452 + 464 + 455

3

1371

=-- 3

= 457

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

575 v. Heaters are rated at 240 v, 480 v, or 875 v. If power distribution volt-

age to unit varies from rated heater voltage, heater kW will vary accordingly.

l-Fuse or HACR circuit breaker.

**Heaters are field installed only.

NOTES:

1. In compliance with NEC requirements for multimotor and combination load

equipment (refer to NEC Articles 430 and 440), the overcurrent protective

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

fuse or circuit breaker.

2. Unbalanced 3-Phase Supply Voltage

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

o

greater than 2_. Use the following formula to determine the percent of volt-

age imbalance,

% Voltage Imbalance

= 100 x max voltage deviation from average voltage

average voltage

Determine maximum deviation from average voltage.

(AB) 457 - 452 = 5 v

(BC) 464 -487 = 7 v

(AC) 457 - 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

7

% Voltage Imbalance = 100x

= 1.53%

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

allowable 2%.

I IMPORTANT: If the supply voltage phase imbalance is more than ]2%, contact your local electric utility company immediately. J

3. MCA calculation for units with electric heaters over 80 kW = (1.25 x IFM

amps) + (1.00 x heater FLA).

Table 3 -- Electric Resistance Heater Data

UNIT

50HJ

015

017

HEATER kW

Unit Voltages HEATER %HEAT MAXIMUM

STAGES PER STAGES*

208 230 240 460 480 575 600 STAGE

14 17 19 14 15 1 100 1

26 31 34 30 32 2 50/50 2

42 52 56 50 55 37 40 2 33/67 3

26 31 34 30 32 2 50/50 2

42 52 56 50 55 2 33/67 3

56 69 75 73 80 2 50/50 4

MINIMUM

Heating Cfm

Cfm L/s

3750 1770

208 230

39.3 43.4

71.3 78.9

117.0 129.4

71.3 78.8

117.0 129.4

155.9 172.4

3750 1770

*Maximum number of stages using accessory low-ambient kit or head pressure control device and low-ambient kit.

NOTE: Heaters are rated at 240,480, and 575 v.

HEATER AMPS

240 460 480

45.3 17.2 17.9

82.3 37.3 39.0

135.0 63.3 66.1

82.3 37.3 39.0

135.0 63.3 66.1

179.9 92.0 96.0

575 600

37.0 38.6

Table 4 -- Heat Anticipator Settings

UNIT

50HJ

015, 017

UNIT kW* STAGE 1

VOLTAGES

14/19 .40

26/34 .40

208/230-3-60 42/56 .66

56/75 .66

15 .40

32 .40

480-3-60 55 .40

80 .66

575-3-60 37 .66

*Heater kW is based on heater voltage of

STAGE 2

.66

.40

.66

.40

.66

.66

.66

208 v, 240 v, 480 v, and 575 v.

OPTIONAL NON-FUSED DISCONNECT -- On units with

the option_fl non-fused disconnect, incoming power will be

wired into the disconnect switch. Refer to Fig. 12 for wiring

for 100 and 200 amp disconnect switches. Units with an

MOCP (maximum overcurrent protection) under 100 will use

the 100 amp disconnect switch. Units with an MOCP over 100

will use the 200 amp disconnect switch. Refer to the applicable

disconnect wiring diagrmn.

To prevent breakage during shipping, the disconnect handle

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

Install the 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 from shipping location.

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

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

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

Allen bolt is moved.

3. Insert the disconnect shaft into the sqmue 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.

UNIT WIRING 6T3 4T2 2T1 LOAD

100 BLK. YEL. BLU.

AMP

1

I , I

INoNFUSED0'sODNNEOT __L LIN J

FIELD POWER SUPPLY 5L3 3L2 1L1 LINE

UNIT WIRING

200 BLK. YEL. BLU.

AMP ,

I NON FUSED DISCONNECT LINE 1

FIELD POWER SUPPLY

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

ing diagram label and the component arrangement label.

Fig. 12 -- Optional Non-Fused Disconnect Wiring

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

5. Close the control box dool:

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

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

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

position, the handle will be horizontal.

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

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

door is closed.

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

trol box door.

OPTIONAL CONVENIENCE OUTLET-- On units with

optional convenience outlet, a l15-v GFI (ground fault inter-

rupt) convenience outlet receptacle is provided for field wiring.

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

vided in the basepan near the return air opening.

Step 7 -- Make Outdoor-Air Inlet Adjustments

MANUAL OUTDOOR-AIR DAMPER -- All units (except

those equipped with a factory-installed economizer) have a

manual outdoor-tdr damper to provide ventilation all: Damper

can be preset to adinit up to 25% outdoor tdr into return-air

compartment. To adjust, loosen securing screws and move

damper to desired setting. Then retighten screws to secure

damper (Fig. 13).

Step 8 -- Install Outdoor-Air Hood

IMPORTANT: If the unit is equipped with the optiomd

EconoMiSerIV component, move the outdoor-air tempera-

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

Optional EconoMiSerIV and Economi$er2 section for

more information.

The same type of factory-installed hood is used on units

with 25% air ventilation and units with an EconoMiSel:

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

hood diain pan, baffle (size 017 units), and filter support

bracket tu'e secured opposite the condenser end of the unit. The

25% ADJUSTABLE

AIR DAMPER

÷I

SECURING SCREWS

Fig. 13 -- 25% Outdoor-Air Section Details

BASE

UNIT

10

screens, hood side panels, remaining section of filter support

bracket, seal strip, and all other hardware me in a package

located inside the return-air filter access panel (Fig. 14).

1+ Attach seal strip to upper filter retainel: See Fig. 15.

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

tainer, and hood diain pan (Fig. 16)+

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

port bracket to unit. See Fig+ 16. Leave screws loose on

size 017 units.

4. Slide baffle (size 017 units) behind lower filter retainer

and tighten screws.

5. Loosen 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 flange 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

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

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

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

5/8-in. long. Drill required screw holes for mounting baffles.

BAFFLE (017 ONLY)

LOWER FILTER

RETAINER

FILTER SUPPORT

BRACKET

\

HOOD SIDE

\PANELS (2)

HOOD TOP

PANEL

BAFFLE

• (017 ONLY)

FILTER

PACKAGE AN[

HOOD

COMPONENfS

RETURN-AIR FtLTE}

ACCESS PANEL

Fig. 14- Outdoor-Air Hood Component Location

TOP PANEL

UPPER FILTER. HOOD DRAIN

RETAINER X PAN

Fig. 15 -- Seal Strip Location

(Air Hood Cross-Sectional View)

Step 9 -- Install All Accessories -- After all the

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

installed accessories. Refer to the accessory installation instruc-

tions included with each accessory.

MOTORMASTER® I CONTROL INSTALLATION

Install Field-Fabricated Wind Baffles -- Wind baffles must

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

operation at low mnbient temperatures. See Fig+ 17 for baffle

LOWER

FI_ER

RETAINER

BRACKET

HOOD DRAIN PAN

UPPER FILTER RETAINER

NOTE: The outdoor-air hood comes with a baffle which is used on 017 units

only; discard baffle for 015 units.

Fig. 16- Outdoor-Air Hood Details

) MIN

BAFFLETOP VIEW 1" (25) MIN--_

I= 80- to%---4

/

/.

"%

÷ _ "+.

+ j÷-

+J \,+

3/4" 09)(_P)-+J _

BAFFLEFRONTVIEW

NOTE: Dimensions in ( ) are in mm.

Fig. 17- Wind Baffle Details

Jl 10" (254)

/" ffYp)

-- 40"

(to16)

,..,10" (254)

- (TYP)

"'-_1_+ 5"(381)

__ (TYP)

1" (25) MIN

11

To avoid dmnage to tile refiigerant coils and electrical com-

ponents, use recommended screw sizes only. Use cme

when &illing holes.

Install Motormaster [Controls -- Only one Motormaster I

control is required per unit. The Motormaster [control must be

used in conjunction with the accessory 0 ° F low mnbient kit

(purchased separately). The Motormaster I device controls out-

door fan no. 1 while outdoor fans no. 2 and 3 are sequenced off

by the accessory 0° F low ambient kit.

A_zessorv 0 °F Low Ambient Kit -- Install the accessory 0° F

low ambient kit per instruction supplied with accessory.

Sensor Assembly -- Install the sensor assembly in the location

shown in Fig. 18.

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

ing motor mount with the new motor mount provided with

accessory.

Tran@nw_er (460 and 575-v Units Only) -- On 460 and

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

provided with the accessory and must be field-installed.

MotormasWr 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-

c:dly, with leads protruding from bottom of extrusion.

MOTORMASTER-------

SENSOR

LOCATION

i

HAIRPIN END

NOTES:

1. All sensors are located on the eighth hairpin up from the bottom.

2. Field-installed tubing insulation is required to be installed over the TXV

(thermostatic expansion valve) bulb and capillary tube for proper operation

at low ambients. Tubing insulation is only required on the portion of suc-

tion line located between indoor and outdoor section.

Fig. 18 -- Motormaster_) I Sensor Locations

Step 10- Adjust Factory-Installed Options

PREMIERLIN K TM CONTROL -- The PrelnierLink control-

let is available as a special order from the factory and is com-

patible with the Cmrier Comfort Network® (CCN) system.

This control is designed to allow use_ the access and ability to

change factory-defined settings, thus expanding the function of

the stan&trd unit control board. Carrier's diagnostic stan&trd

tier display tools such as Navigato( r_'_ device or Scrolling

Marquee c_m be used with the PremierLink controlle_:

The PremierLink controller (see Fig. 19) requires the use of

a Cmrier electronic thermostat or a CCN connection for time

broadcast to initiate its internal timeclock. This is necessary for

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

sensors are supplied with the field-mounted PremierLink

control. The factory-installed PremierLink control includes

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

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

(CO2) sensor can be added as an option. Refer to Table 5 for

sensor usage. Refer to Fig. 20 for PremierLink controller wir-

ing. The PremierLink control may be mounted in the control

panel or an mea below the control panel.

NOTE: PremierLink controller version 1.3 and kiter is shipped

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

controller must be configured to Thermostat mode.

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

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

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

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

PremierLink control over the control box, through a grommet,

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

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

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

horizontal opening end) in its shipping position. Remove the

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

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

loc_d codes). Drill or punch a 1/2-in. hole in the flange or duct.

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

probe in a horizontal orientation.

NOTE: The sensor must be mounted in the discharge airstream

downstream of file cooling coil and any heating devices. Be

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

or heat surfaces.

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

supplied with a factory-mounted PremierLink control, the

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

wired.

Install the Indoor Air Quality (COa2 Sensor -- Mount the

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

turer specifications. A separate field-supplied transformer must

be used to power the CO2 sensor:

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

on the PremierLink controlle_: Refer to the PremierLink Instal-

kition, Start-up, and Configuration Instructions for detailed

wiring and configuration information.

12

HVAC SENSOR INPUTS

SPACE TEMP

SET POINT

SUPPLY AIR TEMP

OUTDOOR TEMP

INDOOR AIR QUALITY

OUTDOOR AIR QUALITY

DUAL MODE SENSOR (STAT)

COMP SAFETY (Y1) 7

FIRE SHUTDOWN (Y2) /

SUPPLY FAN STATUS (Wl)

NOT USED (W2) /

ENTHALPY STATUS (ENTH)

O

O

O

(

_STATC_ !

_RN i C _s} _ Fatt Nmnboc &_OSPREMLK

=o_]oi PremlerL_nk ..... --

/- t/t"4 "-4 "-..

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

PORT PORT ECONOMIZER FAN MOTOR 1 & 2 LOW/HIGH RVSVALVE

OUTPUTS

Fig. 19- PremierLink TM Controller

Table 5 -- PremierLink Sensor Usage

OUTDOOR AIR RETURN AIR OUTDOOR AIR RETURN AIR

APPLICATION TEMPERATURE SENSOR TEMPERATURE SENSOR ENTHALPY SENSOR ENTHALPY SENSOR

Differential Dry Bulb

Temperature with Required --

PremierLink* Included -- 33ZCT55SPT -- --

(PremierLink HH79NZ039 or Equivalent

requires 4-20 mA

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) H H57AC077

*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 E closes at 50 E

13

T_

SAT

OAT

_<PU-6

BLU

w_

CLOl

BLUE

[_ BRN

BLK

GRN BRN

WHT •ORN

BRN •

VIO •VIO

RED BRN

[_ BLU

__ GRN

RED

- -- YEL --

RED

BLU

RED

WHT

RED

- PNK

_ RED

_ _-- RE

DDC CONTROL R TSTAT CONTROL

CMP SAFE Y1 Y1

FSD Y2 Y2

SFS Wl Wl

NOT USED W2 W2

RMTOCC G G

C C C

X X X

TB21-

R

Y1

Y2

Wl

W2 -- -- --

G

x

TB2

I t

U _

n I

I IU!

U IUL

n

U

BLU SPT

_N COM

_LK _

tOM

C_

_RN tOM

_o _

BRN COM

£ED_

C_

_L_

eoc

CONTROL

GRN_

RED _

YEL_

RED _

£EO_

WHT_

REO_

C_

ORN_

RED_

PremierLink

Control

*If PremierLink control is in thermostat mode,

1-TB2 terminal designations for 24 vac discrete inputs, Default is for DDC control.

I.....

posmoN0 LEN NO AC_ON

POS_ON 1 CCN LOAD FACTORy DEFAULTS ON POWERUP

OON-- °L'I REDII I

_TH EFIELDTAT_ 2 _24v _ _ ......

I_L_ ORN VIO RED

"(_ _pLl TRANsUN;MER tO: ' F_L_c_K9 :R(_O_, M_RvO_2 :GRcOM

EGC-G

GLEGEND

CLO -- Compressor Lockout

CMP -- Compressor

ECONO- Economizer

ENTH -- Enthalpy Sensor

IGC -- Integrated Gas Unit Controller

MGV -- Main Gas Valve

OAT -- Outdoor Air Temperature Sensor

PL -- Plug

SAT -- Supply Air Temperature Sensor

SPT -- Space Temperature Sensor

TB -- Terminal Block

TRAN -- Transformer

©

Q

ECONOMIZER

50TJ401148

(CREOOMZR010800)

4.20ma

3 ECONO

1 MOTOR

Fig. 20 -- PremierLink TM Controls Wiring

ENTHALPY SWITCH/RECEIVER -- The accessory en-

thalpy switch/receiver (33CSENTHSW) senses temperature

and humidity of the air surrounding the device and calculates

the enthalpy when used without tin enthtdpy sensol: The relay is

energized when enthalpy is high and deenergized when

enthalpy is low (based on ASHRAE [American Society of

Heating, Refiigerafion and Air Conditioning Engineersl 90.1

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

attached to the return air sensor input, then differential enthalpy

is ctdculatedi The relay is energized when the enthalpy detected

by the return air enthalpy sensor is less than the enthtdpy at the

enthalpy switch/receivel: The relay is deenergized when the

enthalpy detected by the return air enthalpy sensor is greater

than the enthalpy at the enthalpy switch/receiver (differential

enthtdpy control). See Fig. 21 and 22.

OUTDOOR ENTHALPY CONTROL (Fig. 23) -- Outdoor

enthalpy control requires only tin enthalpy switch/receiver

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

the outdoor air inlet and calculates outdoor air enthalpy. The

enthalpy switch/receiver energizes the relay output when the

outdoor enthalpy is above 28 Btu/lb OR din bulb temperature

is above 75 F and is deenergized when file outdoor enthalpy is

below 27 Btu/lb AND dUbulb temperature is below 74.5 E

The relay output is wired to the unit economizer which will

open or close depending on the output of the switch.

NOTE: The enthalpy calculation is done using tin average

altitude of 1000 ft above sea level.

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

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

intt&e). The enthtdpy switchheceiver 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 screws. Insert the screws through the holes in the

sides of the enthalpy switch/receivel:

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 enthtdpy

switch/receiver; as shown in Fig. 23, the PremierLink TM board

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

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

el: On some applications, the power fi_m the economizer har-

ness can be used to power the enthalpy switch/receivec To

power the enthalpy switch/receiver from the economizer har-

ness, connect power of the enthalpy switch/receiver to the red

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

For connection to roollop units with PremierLink control,

connect the LOW Enthalpy terminal on the enthalpy switch/re-

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

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

trol board if desired. Wire file 24 VAC terminal on file enthalpy

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

the GND termimd on file enthalpy switch/receiver to Jl --

pin 2 on the PremierLink control. The HI Enthalpy terminal is

not used. See Fig. 23.

25"-,--

(8 35ram)

ulb_

+'4"4

4253"

(108 03ram) IP

into

Thermistor --_ S Humidity Sensor

Fig. 21 -- Enthalpy Switch/Receiver Dimensions

(33CSENTHSW)

25'*- --

(6 35rnm)

4253"

(I 08 03turn)

¢to 3OmA

375"

(95 25rnm)

Thermistor -_

IJ,

c_ _o

S HurnMity Sensor

N_

Fig. 22 -- Enthalpy Sensor Dimensions

(33CSENTSEN)

15

/

o

\

GRY eORN

-- -- _GRY _e RED

E

E

UA _ V_COUr

gNT_tA_ _'Y

p_: _ VAC

_: loA F_ I¢ P_hy_!

24 VAC So_a Po_

0f

O_'J1

0 0

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

*Used with Differential Enthalpy Control only.

Fig. 23 -- Typical Wiring Schematic -- Carrier Rooftop Unit with PremierLink TM Controls

DIFFERENTIAL ENTHALPY CONTROL (Fig. 24) --

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 ai_:

The enthalpy switch/receiver energizes the HI Enthalpy re-

lay output when the outdoor enthalpy is greater than the indoor

enthalpy. The LOW Enth_dpy terminal is energized when the

outdoor enth_dpy 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 _flti-

tude of 1000 ft above sea level.

Mounting -- Mount the enthalpy switchheceiver in a location

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

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

sure 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 the sides of the enth_dpy switch/receive_:

Mount the enthalpy sensor in a location where the indoor air

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

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

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

snow. Use two field-supplied no. 8 x 3/4-in. TEK screws. Inset1

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

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

twisted pair or shielded cable for all wiring. All connections

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

The PremierLink TM board provides 24-vac to power the en-

thalpy switch/receive_: Connect the GND and 24 VAC termi-

nals on the enth_dpy switch/receiver to the terminals on the

transformec On some applications, the power from the econo-

mizer harness can be used to power the enthalpy switch/receiv-

e_: To power the enthalpy switch/receiver from the economizer

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

red and brown wires (1 and 4) on the economizer 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 board if desired. Wire the 24 VAC terminal on the

enthalpy switchheceiver to J4 -- pin 1 on the PremierLink

control. Wire the GND terminal on the enthalpy switch/

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

Enthalpy termimd is not used. See Fig. 23.

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 sensor: Connect the 24-36 VDC OUT terminal on the

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

return air enth_dpy sensoc See Fig. 24.

16

120 VAC

LINE VOLTAGE J

24 VAC OUTPUT FROM N/C CONTACT WHEN

THE OUTDOOR ENTHALPY IS LESS THAN

THE INDOOR ENTHALPY

(ENABLE ECONOMIZER)

ORN

24 VAC OUTPUT FROM N/O CONTACT WHEN THE

INDOOR ENTHALPY IS GREATER THAN THE

OUTDOOR ENTHALPY

f

,/

HI LOW GND 24

ENTHALPY VAC 4-20 24-36

rnA VDC

IN OUT

"_ 33CSENTHSW

/

/

24-36 4-20

VDC rnA

IN OUT

"_ 33CSENTSEN

LEGEND

N/C -- Normally Closed

N/O -- Normally Open

JUMPER SETTINGS FOR 33CSENTHSW

o _ o_

_ _ooo

II°°°

000

JUMPER SETTINGS FOR 33CSENTSEN

O o ol

CO IX)

Fig. 24- Differential Enthalpy Control Wiring

Enthalpy Switch/Receiver Jumper Settings -- There are two

jumpel.s. One jumper determines the mode of file enthalpy

switchheceivel: The other jumper is not used. To access the

jumpel.s, remove the 4 screws holding the cover on the

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

tory settings for the jumpers are MI and OFF.

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

thalpy control. The factory test jumper should remtdn on OFF

or the enthalpy switch/receiver will not calculate enthalpy.

Enthalpy Sensor Jumper Settings -- There are two jumpers.

One jumper determines the mode of the enthalpy sensor The

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

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

move the covel: The factory settings for the jumpers _ue M3

and OFF.

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

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

enthalpy sensor will not calculate enthalpy.

ENTHALPY SENSORS AND CONTROL -- The enth;dpy

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

to be used with the EconoMiSer2 damper control option. The

outdoor air enth;dpy sensor is part of the enthalpy control. The

separate field-installed accessory return air enthalpy sensor

(HH57AC078) is required for differential enthalpy control

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

differential enthalpy control to won properly.

The enthalpy control receives the indoor and return

enthalpy from the outdoor and return air enthalpy sensors and

provides a @ contact switch input to the PremierLing TM

controllel: Locate the controller in place of an existing

economizer 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

return ai_: An open contact indicates that the economizer

should remain at minimum position.

Outdoor Air Enthalpy Sensor/Enthalpy Controller

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

perform the following (see Fig. 25 and 26):

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

of the enthalpy controller and mounted remotely.

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

enth_flpy control to the PremierLink controller and power

transformer

2. Connect the following 4 wires from the wire harness

located in rooftop unit to the enthalpy controller:

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

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

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

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

harness.

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

Link controller and to terminal (3) on enthalpy

sensoE

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

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

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

provided from the control section to the economizer to connect

PremierLink controller to termimds 2 and 3 on enthalpy sensol:

17

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

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

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

outdoor enth_dpy changeover set point is set at the controller.

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

ing (see Fig. 25):

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

connect the return air enthalpy sensor to the enthalpy

controller.

2.

3.

At the enthalpy control remove the factory-installed

resistor from the (SR) and (+) termin_ds.

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 return air enthalpy

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

ENTHALPY CONTROLLER [_

RED S (OUTDOOR

AIR

TRr'_TRI_- BRN + ENTHALPY

SENSOR)

sor

SR¢'I+lD"

LED

--q

BLK

RED

I [] S (RETURN AIR ]

r] + 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 outside

airstream.

Fig. 25 -- Outdoor and Return Air Sensor Wiring

Connections for Differential Enthalpy Control

HH57AC077

ENTHALPY

CONTROL AND

OUTDOOR AIR

ENTHALPY SENSOR

HH57AC078 ENTHALPY

SENSOR(USED WITH

ENTHALPY CONTROL

FOR DIFFERENTIAL

ENTHALPY OPERATION)

÷÷MOUNTING PLATE

Fig. 26 -- Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

OPTIONAL ECONOMISERIV AND ECONOM[$ER2 --

See Fig. 27 and 28 for EconoMiSerIV component locations.

See Fig. 29 for EconoMi$er2 component locations.

NOTE: These instructions are for installing the optional

EconoMiSerIV and EconoMiSer2 only. Refer to the accessory

EconoMiSerIV or EconoMiSer2 installation instructions when

field installing an EconoMi$erIV or EconoMiSer2 accesso q.

To complete inst_dlation of the optional EconoMiSerIV. per-

form the following procedure.

1. Remove the EconoMiSerIV hood. Refer to Step 8 --[n-

stall Outdoor-Air Hood on page 10 for information on

removing and installing the outdoor-air hood.

2. Relocate outdoor air temperature sensor from shipping

position to operation position on EconoMiSerIV. See

Fig. 27.

IMPORTANT: Failure to relocate the sensor will result in

the EconoMiSerlV not operating properly.

3. Reinstall economizer hood.

4. Install all EconoMiSerIV accessories. EconoMiSeltV

wiring is shown in Fig. 30. EconoMiSer2 wiring is shown

in Fig. 31.

Outdoor air leakage is shown in Table 6. Return air pressure

drop is shown in Table 7.

OUTDOOR AIR

TEMPERATURE SENSOR

SCREWS ECONOMI$ERIV FTRAME SCR}EWS (/NSsTALoLN_D OPERATION

I ! LOW TEMPERATURE

I i COMPRESSOR

LOCKOUT SWITCH

_g kv _J

Fig. 27 -- EconoMi$erlV Component Locations --

End View

SUPPLY AIR

TEMPERATURE SENSOR

LOCATION

ECONOMI$ERIV

FLANGE

(HIDDEN)

r

Fig. 28 -- EconoMi$erlV Component Locations --

Side View

18

FRAME ECONOMIBER2

SCREWS _i !

_J

SCREWS

Fig. 29 -- EconoMi$er2 Component Locations

LI_4

LI-B

-{NOI USED}

LI-9

m

PLI-8

TO MAIN PLI*5

CONTROL

BOX

PLI-I

PLI-D

41.D

(NOT USED)

YEL

-PNK

-BLU

RED

-- ORN

ACCESSORY 1 [] SET

RE_OT_ MIN

POS]T IO_ POT BLI_ BV 1DV

SENSOR (Bk Ohm} POS

IAO SENSOR l._ _, i _ ]ZV toy

I I OAf TZWPI L-- _, /\ BCV

If _NT.A_PYS_,SOR _J A_ _ o_,

_SO÷ _ _ _"

RETUR_ AIR TEMPI COOL

_ I Z.T.ALPY SE.SOR _' _C

i I BLU

I J PNK--_

I I LALB r

1 I FIELD SPLICE I

'_ I BRN

,L RED

FIELD SPLICE

ZCONOMI DZR MOTOR

LEGEND Potentiometer Default Settings:

DCV -- Demand Controlled Ventilation Power Exhaust Middle

IAQ -- Indoor Air Quality Minimum Poe. Fully Closed

DCV Max. Middle

LALS-- Low Temperature Compressor

Lockout Switch DCV Set Middle

OAT -- Outdoor-Air Temperature Enthalpy C Setting

POT -- Potentiometer

ZCONOMIBZR I_

BOARD

0

"I

/

NOTES:

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. 30 -- EconoMi$erlV Wiring

19

NOTE1

NOTE2

J

50HJ540573

ACTUATOR

ASSEMBLY

/( o

_RUN

DIRECT DRIVE

ACTUATOR

500 OHM

RESISTOR" 7

OAT

RED

PINK

BLUE

BLACK

4

3

7

2

8

6

5

1

10

11

9

WHITE 12

ECONOMISER2 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. 31 -- EconoMi$er2 Wiirng

Table 6 -- 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 7 -- Return Air Pressure Drop (in. wg)

CFM

4500 5000 5400 6000 7200 7500

0.040 0.050 0.060 0.070 0.090 0.100

ECONOMISERIV STANDARD SENSORS

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

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

used to measure file outdoor-air temperature. The outdoor-air

tempelature is used to determine when the EconoMiSer[V can

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

See Fig. 27. 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. 28. This sensor is factory installed. The op-

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

Table 8 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 seeded from moisture.

Low Temperature Compressor Lockout Switch -- The

EconoMiSerIV is equipped with an ambient temperature lock-

out switch located in the outdoor airstream which is used to

lockout the compressol_ below a 42 F ambient temperature.

See Fig. 27.

2O

Table 8 -- Supply Air Sensor Temperature/

Resistance Values

TEMPERATURE(F) RESISTANCE(ohms)

-58 200,250

-40 100,680

-22 53,010

-4 29,091

14 15,590

32 9,795

50 5,970

68 3,747

77 3,000

86 2,416

104 1,597

122 1,080

140 746

158 525

176 376

185 321

194 274

212 203

230 153

248 115

257 102

266 89

284 70

302 55

ECONOM[$ERIV CONTROL MODES

IIMPORTANT: The optional EconoMi$er2 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. 31 for wiling infonnation.

Detennine the EconoMiSerlV control mode before set up of

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

sors. Refer to Table 9. The EconoMi$erIV is supplied from the

factory with a supply air temperature sensor, a low temperature

complessor lockout switch, and an outdoor air temperature

sensol: This allows for operation of the EconoMi$erIV with

outdoor air dry bulb changeover control. Additional accesso-

ries can be added to allow for different types of changeover

control and operation of the EconoMiSerIV and unit.

Table 9 -- EconoMiSerlV Sensor Usage

APPLICATION

Outdoor Air

Dry Bulb

Differential Dry Bulb

Single Enthalpy

Differential Enthalpy

CO2 for DCV Control

using aWall-Mounted

CO2 Sensor

CO2 for DCV Control

using a Duct-Mounted

CO2 Sensor

ECONOMISERIV WITH OUTDOOR AIR

DRY BULB SENSOR

Accessories Required

None. The outdoor air dry bulb sensor

is factory installed.

CRTEMPSN002A00*

HH57AC078

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.

1-1-CRCBDiOX005A00 is an accessory that contains both 33ZCSENCO2

and 33ZCASPCO2 accessories.

Outdoor Dly Bulb Changeover -- The standard controller is

shipped from the facto qconfigured for outdoor @ bulb

changeover control. The outdoor air and supply air temperature

sensors ;ue included as stan&ud. For this control mode, the

outdoor temperature is comptu'ed to an adjustable set point se-

lected on the control. [f the outdoor-air temperature is above

the set point, the EconoMiSerIV will adjust the outdoor-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 ail: 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 flee cooling set point potentiometer located

on the control. See Fig. 32. The sc_de on the potentiometer is A,

B, C, and D. See Fig. 33 for the corresponding temperatme

changeover values.

Differential Dry Bulb Control -- For differential dry bulb

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

tion with an additional accessory return air sensor (pall number

CRTEMPSN002A00). The accessory sensor must be mounted

in the return airstream. See Fig. 34.

In this mode of operation, the outdoor-air tempelature 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 file free cooling/enthalpy set point

potentiometer fully clockwise to the D setting. See Fig. 32.

FAN SET POINT

LED

WHEN EXHAUST

CONTACT IS MADE

POSITION SETTING

MAXtMt

DEMAND CONTROL

VENTILATION SET POINT

LED LIGHT_

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. 32 -- EconoMi$er IV Controller Potentiometer

and LED Locations

19

18 ''_'+'_ LED _ON

LED ON

16- -- - LED OFF

_14

13

12

11

lO

9

4o 46 50 55

LED ON

LED ON-- --

LED OFF"_

I

65 70 75 80 85 90 95 100

DEGREES FAHRENHEIT

Fig. 33 -- Outside Air Temperature

Changeover Set Points

21

RETURN AIR

IAQ TEMPERATURE

SENSOR OR ENTHALPY

SENSOR

Fig. 34 -- Return Air Temperature or

Enthalpy Sensor Mounting Location

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. 27. When the outdoor air enthalpy rises

above file outdoor enthalpy changeover set point, file 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 EconoMiSerlV controllel: The

set points are A, B, C, and I). See Fig. 35. The factory-installed

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

on the EconoMiSerIV controllel: See Fig. 30 and 36.

Differential Enthalpy Control -- For differential enth_dpy

control, the EconoMiSerIV controller uses two enthalpy sen-

sors (HH57AC078 and CRENTI)IF004A00), one in the out-

side air and one in the return airstream or the EconoMiSerIV

frame. The EconoMiSerlV controller compmes the outdoor air

enthalpy to file return air enthalpy to determine EconoMi$erIV

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

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

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

EconoMiSerIV opens to bring in outdoor tfir for free cooling.

Replace the standard outside air dry bulb temperature sen-

sor with the accessory entbalpy sensor in the same mounting

location. See Fig. 27. Mount the return air enthalpy sensor in

the return airstream. See Fig. 34. The outdoor enthalpy

changeover set point is set with the outdoor enthalpy set point

potentiometer on the EconoMiSerlV controller. When using

this mode of changeover control, turn the enthalpy setpoint po-

tentiometer fully clockwise to the D setting.

CONTROL CONTROL POINT

CURVE APPROX. °F (°C)

AT 50% RH

A 73123)

B 70(21)

C 67 {19)

D 63 (17)

85 90 95 100 105 110

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

7-,

-.,/

7,,

\

-../

y.,.

\

-./

\

\

)<

\

HIGH LIMIT

CURVE

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

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

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

Fig. 35 -- Enthalpy Changeover Set Points

22

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

sor is installed.

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

can be used for demand control ventilation control based on the

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

Mount the accessory IAQ sensor according to manufacturer

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

AQI terminals of file controller Adjust the DCV potentiome-

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

qufflity sensor fit the usel;determined set point. See Fig. 37.

If a separate field-supplied transfon3rler is used to power the

IAQ sensor, the sensor must not be grounded or the

EconoMiSerIV control board will be &imaged.

Exhaust Set Point Adjustment -- The exhaust set point will

determine when the exhaust fan runs based on damper position

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

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

See Fig. 32. The set point represents the dm3rlper position above

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

for exhaust, the EconoMiSerIV controller provides a 45 _+ 15

second delay before exhaust fan activation to allow the damp-

ers to open. This delay allows the damper to reach file appro-

priate position to avoid unnecessary fan overload.

Minimum Position Control -- There is a minimum damper

position potentiometer on the EconoMiSerIV controllel: See

Fig. 32. The minimum dmnper position maintains the mini-

mum airflow into the building during the occupied period.

...........................TR

v'ac DM

EF_ _F1

..../

Fig. 36- EconoMi$erlV Controller

6000

5000

z

_o 4000

rr

---. 3000

Lk

z

oO 2000

IJJ

(5

z 1000

<

rr

CO 2 SENSOR MAX RANGE SETTING

+ 800ppm

+1100 ppm

o

2345678

DAMPER VOLTAGEFOR MAX VENTILATIONRATE

Fig. 37 -- 002 Sensor Maximum Range Setting

When using demand ventilation, the minimum dm3rlper po-

sition represents the minimum ventilation position for VOC

(volatile organic compound) ventilation requirements. The

maximum demand ventilation position is used for fully occu-

pied ventilation.

When demand ventilation control is not being used, the

minimum position potentiometer should be used to set the oc-

cupied ventilation position. The maximum demand ventilation

position should be turned fully clockwise.

Adjust the minimum position potentiometer to allow the

minimum amount of outdoor ail, as required by local codes, to

enter the building. Make minimum position adjustments with

at least 10 ° F temperature difference between file outdoor and

return-air temperatures.

To determine the minimum position setting, perform the

following procedure:

1. Calculate the appropriate mixed-air temperature using the

following formula:

OA RA

(To x l-T0-0- ) + (TR x l-T00- = TM

To = Outdoor-Air Temperature

OA = Percent of Outdoor Air

TR = Return-Air Temperature

RA = Pement 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 E and return-air temperature is 75 E

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

2. Disconnect the supply-ffir sensor from temlinals T and

TI.

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

terminals P and Pl. If remote damper positioning is being

used, make sure that the terminals are wired according to

Fig. 30 and that the minimum position potentiometer is

turned fully clockwise.

4. Connect 24 vac across terminals TR and TRI.

5. Carefully adjust the minimum position potentiometer

until the measured mixed-air temperature matches the

calculated vfflue.

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

Remote control of the EconoMi$erIV damper is desirable

when requiting additional tempora Uventilation, ff a

field-supplied remote potentiometer (Honeywell pfu-t number

$963B1128) is wired to the EconoMi$erIV controllen the min-

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

location.

To control file minimum damper position remotely, remove

file factou-installed jumper on file P and PI terminals on the

EconoMi$erIV controller Wire the field-supplied potentiome-

ter to the P and PI terminals on the EconoMi$erIV controllen

See Fig. 36.

Damper Movement -- Damper movement from full open to

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

Thermostats -- The EconoMi$erlV 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 temperatme

sensors. Connections fue made at the themlostat terminal con-

nection board located in file main control box.

Occupancy Control -- The facto Udefault configuration for

the EconoMi$erIV control is occupied mode. Occupied status

is provided by the red jumper from terminal 9 to terminal 10 on

TB2. When unoccupied mode is desired, install a field-

supplied timeclock function in place of the jumper between

23

terminals9and10onTB2.SeeFig.30.Whenthetimeclock

contactsareclosed,theEconoMiSerIVcontrolwillbeinoccu-

piedmode.Whenfiletimeclockcontactsareopen(removing

the24-vsignalfromterminalN),theEconoMiSerIVwillbein

unoccupiedmode.

Demand Controlled Ventilation (DCV) -- When using the

EconoMiSerlV for demand controlled ventilation, there me

some equipment selection criteria which should be considered.

When selecting the heat capacity and cool capacity of the

equipment, the maximum ventilation rate must be evaluated for

design conditions. The maximum dmnper position must be cal-

culated to provide the desired fresh tdl:

Typically file maximum ventilation rate will be about 5 to

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

normal outside air design criteria.

A proportional anticipatory strategy should be taken with

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

pancy, and equipment that cannot exceed the required ventila-

tion rate tit design conditions. Exceeding the required ventila-

tion rate means the equipment can condition air tit a maximum

ventilation rate that is greater than the required ventilation rate

for maximum occupancy. A proportional-anticipatory strategy

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

level increases even though the CO2 set point has not been

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

dmnper will be tit maximum ventilation and should maintain

the set point.

In order to have the CO2 sensor control the economizer

dalnper in this manner, first determine the damper voltage out-

put for minimum or base ventilation. Base ventilation is the

ventilation required to remove contaminants during unoccu-

pied periods. The following equation may be used to determine

the percent of outside-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---if6-) + (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 dmnper position potentiometer to the correct position.

The stone equation can be used to determine the occupied or

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

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

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

lation rate of 20% (or base plus 15 cfin per person). Use Fig. 37

to determine the maximum setting of the CO,__sensor For ex-

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

sign. Use the 1100 ppm curve on Fig. 37 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

CO,__sensor to the actuator when the CO,_ concentration in the

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

since the CO2 sensor voltage will be ignored by the

EconoMiSerIV controller until it rises above the 3.6 volt setting

of the minimum position potentiometer

Once the fully occupied dmnper position has been deter-

mined, set file maximum dalnper demand control ventilation

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

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

tial high-humidity levels.

CO,_ Sensor Configuration --The CO2 sensor has preset

standard voltage settings that can be selected anytime after the

sensor is powered up. See Table 10.

Use setting 1 or 2 for Carrier equipment. See Table 10.

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

until the sensor enters the Edit mode.

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

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

Table 10.

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-stanchrd settings:

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

until the sensor enters the Edit mode.

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

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

and press Entel:

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

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

ting is reached.

5. Press Mode to move through the variables.

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

continue to the next vmiable.

Dehumidification of Fresh Air with DCV Control -- Infor-

mation from ASHRAE indicates that the largest humidity load

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

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

the moisture content of the fresh tdr being brought into the

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

heating and cooling processes are more than adequate to re-

move the humidity loads for most commercial applications.

If normal rooftop heating and cooling operation is not ade-

quate for the outdoor humidity level, an energy recovery unit

and/or a dehumidification option should be considered.

24

Table 10 -- 002 Sensor Standard Settings

ANALOG

OUTPUT

SETTING

1

2

3

4

5

6

7

8

EQUIPMENT

Interface with Standard

Building Control System

Economizer

Health & Safety

9Parking/Air Intakes/

Loading Docks

LEGEND

ppm -- Parts Per Million

OUTPUT

Proportional

Proportional

Exponential

Proportional

Proportional

Exponential

Exponential

Proportional

Proportional

VENTILATION

RATE

(cfm/Pereon)

Any

Any

Any

15

20

15

20

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

002

CONTROLRANGE

(ppm)

0-2000

0-2000

0-2000

0-1100

0- 900

0-1100

0- 900

0-9999

0-2000

OPTIONAL

RELAY SETPOINT

(ppm)

1000

1000

1100

1100

900

1100

900

5000

700

RELAY

HYSTERESIS

(ppm)

50

50

50

50

50

50

50

50O

50

Step 11 -- Install Humidistat for Optional

MoistureMi$er TM Package-- MoistureMiser dehu-

midification package operation can be controlled by field

installation of a Carrier-approved hurnidistat. To install tile

humidistat perform tile 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.

Route therlnostat cable or equivalent single leads of col-

ored wire fiom Humidistat terminals through conduit in

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

strip (TB3) as shown in Fig. 38 and Fig. 39. See Fig. 40

for operation_d diagram.

25

MOISTUREMI$ER

_----_YEL

BLK

_'_ BLK_,

CB --

LLSV --

LPS --

TB --

TRAN --

TRAN1_

GRN-YEL

±

LEGEND

Circuit Breaker

Liquid Line Solenoid

Valve

Low-Pressure Switch

Terminal Block

Transformer

TO CRANKCASE

/ HEATER CIRCUITS

EL "BLK

BLK

S-LPS1

CB4 TB3

3.2 AMPS S LPS2

FACTOR

(OR HUMIDISTAT IF USED)

LLSV1

•• LLeV2_ BLK--

Fig. 38 -- Typical MoistureMi$er TM Dehumidification Package

Humidistat Wiring Schematic (460 V Unit Shown)

FACTORY INSTALLED JUMPER

(R[MOVE _F HUNIOISTAT IS USZD)

Fig. 39 -- Typical MoistureMiSer Dehumidification

Package Control Box

26

CONDENSER COIL ,

SUCTION

l DISCHARGE

/

_CCHCRANKCASE

HEATER

\--COMPRESSOR

LIQUID

OUTDOOR AiR

EVAPORATOR

COIL

EQUALIZER

LINE

COIL

3-WAY

VALVE

TXV

BULB

S-LPS -j I

SUB COOLER CONTROL

LOW PRESSURE SWITCH I

_oo_z_,_e_!_L._xv

/

/

INDOOR AIR

LEGEND

-- Thermostatic Expansion Valve

Fig. 40 -- MoistureMi$er TM Dehumidification Package Operation Diagram

27

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.

COMPRESSOR MOUNTING -- Compressors are internal-

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

down bolts.

REFRIGERANT SERVICE PORTS -- Each refrigerant sys-

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

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

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

v;dves are located underneath the low-pressure 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 compressoc

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

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

If the suction pressure 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 compressol:

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.

INTERNAL WIRING- Check all electric_d connections in

unit control boxes; tighten as required.

CRANKCASE HEATER(S)--Heater(s) 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, &image to compressor may result.

EVAPORATOR FAN- Fan belt and variable pulleys are

factory installed. Remove tape from the fan pulley. See

Tables 11- 13 for fan performance &_ta. Be sure that fans rotate

in the proper direction. See Table 14 for air quantity limits. See

Tables 15 and 16 for static pressure infommtion for accessories

and options. See Table 17 for fan rpm at various fan motor pul-

ley settings. See Table 18 for evaporator-fan motor specifica-

tions. To alter fan performance, see Evaporator Fan Perfor-

mance Adjustment section, page 35.

CONDENSER FANS AND MOTORS -- Condenser fans

and motors are factory set. Refer to Condenser-Fan Adjustment

section (page 36) as lequired. Be sure that fans rotate in the

conect direction.

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

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

return-air filters.

28

AIRFLOW

(cfm)

375O

4000

4250

4500

4750

5000

5250

5500

5750

6000

6250

Table 11 -- Fan Performance- 50HJ015 (With Standard Indoor Fan Motor)*

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

522 687 0,70 608 841 0.88 704 1045 1.12 781 1229 1.35 853 1419 1.58

549 792 0,82 635 956 1.02 729 1170 1.27 805 1364 1.51 876 1565 1.77

577 903 0.95 661 1078 1.16 753 1302 1.44 828 1506 1.69 898 1716 1.96

604 1021 1.09 687 1207 1.32 776 1440 1.61 850 1653 1.88 919 1873 2.16

631 1147 1.25 713 1343 1.49 800 1584 1.79 872 1807 2.07 940 2037 2.36

658 1281 1,41 738 1486 1.67 822 1735 1.98 893 1968 2.27 959 2207 2.58

684 1423 1.59 763 1637 1.86 844 1894 2.18 913 2135 2.49 979 2385 2.80

710 1572 1.77 787 1796 2.06 865 2060 2.39 933 2311 2.71 997 2571 3.03

736 1732 1.98 811 1965 2.27 887 2235 2.61 953 2496 2.93 1015 2765 3.26

762 1900 2,19 835 2143 2.50 907 2419 2,84 972 2689 3.17 -- -- --

787 2080 2,42 858 2332 2.73 927 2612 3.08 ......

AIRFLOW

(cfm)

3750

4000

4250

4500

4750

5000

5250

5500

5750

6000

6250

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

921 1617 1.83 987 1823 2.09 1051 2051 2.38 1114 2301 2.69 1174 2563 3.02

943 1773 2.03 1007 1989 2.30 1070 2227 2.60 1132 2486 2.92 1190 2756 3.25

964 1934 2.23 1027 2161 2.52 1089 2408 2.83 1148 2676 3.16 -- -- --

984 2102 2.44 1046 2339 2.74 1106 2596 3.06 ......

1003 2276 2.66 1064 2524 2.97 1123 2790 3.29 ......

1022 2457 2.89 1082 2717 3.21 .........

1040 2646 3.12 ............

LEGEND

Bhp -- Brake Horsepower

FlOP -- Factory-Installed Option

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 895 to 1147 rpm. Alter-

nate high-static drive range is 1040 to 1315 (for 208/230 and 460-v

units). The alternate high-static drive range is not available for

575-v units. Other rpms require a field-supplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 3.13 (for

208/230 and 460-v units) or 3.38 (for 575-v units). The maxi-

mum continuous watts is 2700 (for 208/230 and 460-v units) or

3065 (for 575-v units). Do not adjust motor rpm such that motor

maximum bhp and/or watts is exceeded at the maximum oper-

ating cfm.

2. Static pressure losses (i.e., economizer) must be added to

external static pressure before entering Fan Performance table.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and

casing losses. See Table 15 and 16 for accessory/FlOP static

pressure information.

5. Extensive motor and drive testing on these units ensures that

the full bhp and watts range of the motor can be utilized with

confidence. Using fan motors up to the watts or bhp rating

shown will not result in nuisance tripping or premature motor

failure. Unit warranty will not be affected.

6. Use of a field-supplied motor may affect wiring size. Contact

your Carrier representative for details.

29

AIRFLOW

(cfm)

375O

4000

4250

4500

4750

5000

5250

5500

5750

6000

6250

Table 12 -- Fan Performance -- 50HJ015 (With Optional Indoor Fan Motor)*

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

522 687 0.70 608 841 0.88 704 1045 1.12 781 1229 1.35 853 1419 1.58

549 792 0,82 635 956 1.02 729 1170 1.27 805 1364 1.51 876 1565 1.77

577 903 0,95 661 1078 1,16 753 1302 1,44 828 1506 1,69 898 1716 1,96

604 1021 1,09 687 1207 1,32 776 1440 1,61 850 1653 1,88 919 1873 2,16

631 1147 1.25 713 1343 1.49 800 1584 1.79 872 1807 2.07 940 2037 2.36

658 1281 1,41 738 1486 1,67 822 1735 1,98 893 1968 2,27 959 2207 2,58

684 1423 1,59 763 1637 1,86 844 1894 2,18 913 2135 2,49 979 2385 2,80

710 1572 1,77 787 1796 2,06 865 2060 2,39 933 2311 2,71 997 2571 3,03

736 1732 1,98 811 1965 2,27 887 2235 2,61 953 2496 2,93 1015 2765 3,26

762 1900 2,19 835 2143 2,50 907 2419 2,84 972 2689 3,17 1033 2968 3,51

787 2080 2,42 858 2332 2,73 927 2612 3.08 991 2892 3.42 1050 3181 3.76

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW

(cfm) 1.2 1.4 1.6 1.8

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts

3750 921 1617 1.83 987 1823 2.09 1051 2051 2.38 1114 2301

4000 943 1773 2.03 1007 1989 2.30 1070 2227 2.60 1132 2486

4250 964 1934 2.23 1027 2161 2.52 1089 2408 2.83 1148 2676

4500 984 2102 2.44 1046 2339 2.74 1106 2596 3.06 1164 2872

4750 1003 2276 2,66 1064 2524 2,97 1123 2790 3,29 1179 3073

5000 1022 2457 2,89 1082 2717 3,21 1139 2990 3,53 1194 3280

5250 1040 2646 3,12 1099 2916 3,45 1154 3198 3,78 1208 3493

5500 1057 2843 3,36 1115 3124 3,69 1169 3412 4,03 /_',f2 37 _;!2

5750 1074 3048 3.60 1131 3339 3.94 84 2; 3,9_ !

6000 1091 3261 3.85 1147 3562 4,20 i i i2, _-165

6250 1107 3483 4.11 _;2 _ i_ _0:4398

2.0

Bhp Rpm Watts Bhp

2.69 1174 2563 3.02

2.92 1190 2756 3.25

3.16 1205 2954 3.49

3.39 1219 3158 3,73

3.63 1233 3366 3.98

3.88 1247 3579 4.22

4.12 _259 8799 ;!47

NN N_ ? 48....

LEGEND

Bhp -- Brake Horsepower

FlOP -- Factory-Installed Option

Watts -- Input Watts to Motor

*Standard low-medium static drive range is 895 to 1147 rpm. Alter-

nate high-static drive range is 1040 to 1315. Other rpms require a

field-supplied drive.

NOTES:

1. Field-supplied motor.

2. Maximum continuous bhp for the optional motor is 4.26. The

maximum continuous watts is 3610. Do not adjust motor rpm

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

maximum operating cfm.

3. Static pressure losses (i.e., economizer) must be added to

external static pressure before entering Fan Performance table.

4. Interpolation is permissible. Do not extrapolate.

5. Fan performance is based on wet coils, clean filters, and

casing losses. See Table 15 and 16 for accessory/FlOP static

pressure information.

6. Extensive motor and drive testing on these units ensures that

the full bhp and watts range of the motor can be utilized with

confidence. Using fan motors up to the watts or bhp rating

shown will not result in nuisance tripping or premature motor

failure. Unit warranty will not be affected.

7. Use of a field-supplied motor may affect wiring size. Contact

your Carrier representative for details.

.30

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

Table 13- Fan Performance- 50HJ017"

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 1307 1.53 784 1397 1.64 859 1635 1.92 928 1880 2.20

747 1384 1.62 747 1384 1.62 806 1563 1.83 878 1808 2.12 946 2060 2.42

741 1465 1.72 752 1500 1.76 828 1745 2.05 898 1996 2.34 964 2255 2.65

735 1659 1.95 805 1895 2.22 876 2156 2.53 942 2423 2.84 1004 2696 3.16

759 1854 2.18 832 2118 2.48 901 2388 2.80 965 2663 3.12 1026 2943 3.45

790 2088 2.45 860 2360 2.77 926 2638 3.09 988 2920 3.43 1048 3208 3.76

821 2340 2.74 888 2621 3.07 952 2906 3.41 1013 3196 3.75 1070 3491 4.10

852 2611 3.06 917 2900 3.40 979 3194 3.75 1038 3492 4.10 1094 3794 4.45

883 2903 3.40 946 3200 3.75 1006 3501 4.11 1063 3807 4.47 1118 4117 4.83

914 3216 3.77 975 3521 4.13 1033 3830 4.49 1089 4143 4.86 1142 4461 5.23

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

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

993 2133 2.50 1055 2394 2.81 1114 2662 3.12 1170 2938 3.45 1224 3220 3.78

1009 2319 2.72 1070 2585 3.03 1127 2859 3.35 1183 3139 3.68 1236 3427 4.02

1026 2521 2.96 1086 2794 3.28 1142 3073 3.60 1196 3359 3.94 1248 3650 4.28

1064 2975 3.49 1120 3260 3.82 1174 3551 4.17 1226 3848 4.51 1277 4151 4.87

1083 3228 3.79 1139 3520 4.13 1192 3817 4.48 1243 4119 4.83 1292 4427 5.19

1104 3501 4.11 1158 3799 4.46 1210 4102 4.81 1260 4410 5.17 1309 4724 5.54

1126 3791 4.45 1178 4095 4.80 1229 4405 5.17 1278 4720 5.54 1326 5039 5.91

1147 4101 4.81 1199 4412 5.18 1249 4728 5.55 1297 5050 5.92 -- -- --

1170 4431 5.20 1221 4749 5.57 1270 5072 5.95 ......

1193 4781 5.61 1243 5107 5.99 .........

AIRFLOW

(cfm)

4500

4800

5100

5700

6000

6300

6600

6900

7200

7500

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2.2 2.4 2.6 2.8 3.0

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

1276 3509 4.12 1326 3805 4.46 1375 4107 4.82 1421 4414 5.18 1467 4728 5.55

1287 3721 4.36 1336 4020 4.72 1384 4326 5.07 1430 4638 5.44 1475 4955 5.81

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

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

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

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

LEGEND

Bhp -- Brake Horsepower

FlOP -- Factory-Installed Option

Watts -- Input Watts to Motor

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

nate high-static drive range is 1026 to 1200. Other rpms require a

field-supplied drive.

NOTES:

1. Maximum continuous bhp for the standard motor is 6.13. The

maximum continuous watts is 5180. Do not adjust motor rpm

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

maximum operating cfm.

2. Static pressure losses (i.e., economizer) must be added to

external static pressure before entering Fan Performance table.

3. Interpolation is permissible. Do not extrapolate.

4. Fan performance is based on wet coils, clean filters, and

casing losses. See Table 15 and 16 for accessory/FlOP static

pressure information.

5. Extensive motor and drive testing on these units ensures that

the full bhp and watts range of the motor can be utilized with

confidence. Using fan motors up to the watts or bhp rating

shown will not result in nuisance tripping or premature motor

failure. Unit warranty will not be affected.

6. Use of a field-supplied motor may affect wiring size. Contact

your Carrier representative for details.

Table 14- Air Quantity Limits

UNIT MINIMUM CFM

50HJ

015 3600

017 4500

MAXIMUM CFM

6,000

7,500

3!

Table 15 -- Accessory/FlOP Static Pressure (in. wg)

UNIT

50HJ

015, 017

HEATER

RATED

VOLTAGE*

208/240-3-60

480-3-60

575-3-60

CFM

3,750

4,000

5,000

6,000

7,200

7,500

3,750

4,000

5,000

6,000

7,200

7,500

3,750

4,000

5,000

6,000

7,200

7,500

0.05 (14/19, 26/34)

0.05 (14/19, 26/34)

0.07 (14/19, 26/34)

0.09 (14/19, 26/34)

0.11 (14/19, 26/34)

0.12 (14/19, 26/34)

0.05 (16, 32)

0.05 (16, 32)

0.07 (16, 32)

0.09 (15, 32)

0.11 (15, 32)

0.12 (15, 32)

ELECTRIC HEATERS

PRESSURE DROP

(kW)

0.06 (42/56)

0.06 (42/56)

0.08 (42/56)

0.12 (42/56)

0.16 (42/56)

0.17 (42/56)

0.06 (55)

0.06 (55)

0.08 (85)

0.12 (55)

0.16 (85)

0.17 (55)

0.06 (37)

0.06 (37)

0.08 (37)

0.12 (37)

0.16 (37)

0.17 (37)

LEGEND

0.07 (56/75)

0.07 (56/75)

0.10 (56/75)

0.15 (56/75)

0.20 (56/75)

0.21 (66/76)

0.07(80)

0.07(80)

0.10(80)

0.15 (80)

0.20 (80)

0.21 (80)

ECONOMIZER

PRESSURE

DROP

0.03

0.04

0.05

0.07

0.09

0.10

0.03

0.04

0.05

0.07

0.09

0.10

0.03

0.03

0.05

0.07

0.09

0.10

FlOP -- Factory-Installed Option 3.

*There are no electric heaters available for 017 676-v units.

NOTES:

1. Heaters are rated at 240 v, 480 v, and 676 v.

2. The factory assembled horizontal adapter substantially

improves fan performance.

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 table to deter-

mine blower rpm, bhp, and watts.

Table 16- MoistureMi$er TM Dehumidification

Package Static Pressure Drop (in. wg)

UNIT SIZE UNIT NOMINAL CFM PER TON

50HJ TONS 300 400 500

015 12 .026 .045 .071

017 15 .040 .071 .111

Table 17 -- Fan Rpm at Motor Pulley Settings*

50HJ (No. Turns Open) 01/2 1 11/2 2 21/2 3 31/2

015 (208/230, 460, 575 v)t 1147 1124 1101 1078 1055 1032 1010 987

015 (208/230, 460 v)** 1315 1292 1269 1248 1223 1200 1178 1155

017t tt 1-1- tt 1-1- 1021 1002 984 965

017"* tt tf tt tf 1200 1178 1156 1134

*Approximate fan rpm shown.

tlndicates standard drive package.

**Indicates alternate drive package.

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

441/2 5 51/2 6

964 941 918 895 tt

1132 1109 1086 1063 1040

947 928 910 891 873

1112 1091 1069 1047 1025

Table 18- Evaporator Fan Motor Specifications

UNIT NOMINAL MAX EFE MAX MAX MAX

50HJ HP VOLTAGE WATTS % BHP BkW AMPS

015 2.9 208 2700 85.8 3.13 2.34 9.46

(Standard 2.9 230 2700 85.8 3.13 2.34 8.6

2.9 460 2700 85.8 3.13 2.34 4.3

Motor) 3 575 3065 81.7 3.38 2.53 3.9

015 3.7 208 3610 85.8 4.26 3.18 10.5

(Optional 3.7 230 3610 85.8 4.26 3.18 10.5

Motor) 3.7 460 3610 85.8 4.26 3.18 4.8

5 208 5180 87.5 6.13 4.57 15.8

017 5 230 5180 87.5 6.13 4.57 15.8

5 460 5180 87.5 6.13 4.57 7.9

5 575 5180 87.5 6.13 4.57 6.0

LEGEND

BHP -- Brake Horsepower

32

Operating Sequence

COOLING. UNITS WITHOUT ECONOMIZER --When

thermostat 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 themlostat. When free cooling is available, the

outdoor-air &unper is modulated by the EconoMiSeriv 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 (open 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 cktmpers 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_dled, as the outdoor-air

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

gized and deenergized.

If field-installed accessory CO2 sensors are connected to the

EconoMiSer IV control, a demand controlled ventilation strate-

gy will begin to operate. As the CO,_ level in the zone increases

above the CO2 set point, the minimum position of the &tmper

will be increased proportionally. As the CO2 level decreases

because of the increase in fresh all: 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 full open (or vice

vel.sa) 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.s open to maintain the supply air temperature set

point at 50 to 55 E

As the supply-air temperature diops below the set point

range of 50 to 55 E the control will modulate the outdoor-air

dampers closed to maintain the proper supply-air temperature.

HEATING, UNITS WITH ECONOMISERIV -- When the

room temperature 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. the economizer dmnper is fully closed.

COOLING. UNITS WITH ECONOMISER2, PREMIER-

LINK TM CONTROL AND A THERMOSTAT -- When free

cooling is not available, the complessors 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 occurs when the is no c_dl from the thermostat

except G Pre-cooling is defined as the economizer modulates

to provide 70 F supply all:

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 thermostat 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 E

• 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 sup-

ply 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 TM control, a PID-controlled demand ventilation

strategy will begin to operate. As the CO2 level in the zone

increases above the CO2 set point, the minimum position of the

cktmper will be increased proportionally. As the CO2 level

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

&lmper will be proportionally closed.

33

HEATING.UNITSWITHECONOMISER2,PREMIERLINK

CONTROLANDA THERMOSTAT-- Whenthethermostat

c_dlsforheating,terminalWI isenergized.ThePremierLink

controlwillmovetheeconomizerdampertotheminimumpo-

sitionif thereisacallforGandclosedif thereisacallforWI

withoutG Inordertopreventthermostatfromshortcycling,

theunitislockedintotheheatingmodeforatleast10minutes

whenWI isenergized.

Onunitsequippedfortwostagesofheat,whenadditional

heatisneeded,W2isenergizedandtheelectricheat(if used)

comeson.WhenthethermostatissatisfiedandWI isdeener-

gized,theIFMstops.

COOLING. UNITS WITH ECONOMISER2, PREMIER-

LINK CONTROL AND A ROOM SENSOR -- When free

cooling is not available, the compressors will be controlled by

the PremierLink controller using a PID Error reduction c_flcula-

tion as indicated by Fig 41.

The PremierLink controller will use the following informa-

tion 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 F.

• OAT must be less than SPT.

• Enthalpy must be LOW (may be jumpered if and

enthalpy sensor is not available).

• Economizer position is NOT forced.

When free cooling is available, the outdoor-air damper is po-

sitioned through the use of a Proportional Integral (PlD) control

process to provide a calculated supply-air temperature into the

zone. The supply air will maintain the space temperature be-

tween the heating and cooling set points as indicated in Fig. 42.

The PremierLink control will integrate the compressol.s

stages with the economizer based on simiku 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

valves 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 prevents the supply-air temperature

from &opping too quickly and creating a freeze condition that

would make the compressor turn off prematurely.

The high space set point is used for DX (direct expansion)

cooling control, while the economizer space set point is a

c_dculated value between the heating and cooling set points.

The economizer set point will always be at least one degree

below the cooling set point, allowing for a smooth transition

from mechanical cooling with economizer assist, back to

economizer cooling as the cooling set point is achieved.

The compressors may be used for initkfl cooling then the

PremierLink controller will modulate file economizer using an

enor reduction calculation to hold the space temperature

between the heating and cooling set points. See Fig. 42.

The controller uses the following conditions to determine

economizer cooling:

• Enthalpyis Low.

• SAT reading is available.

• OAT reading is available.

• SPT reading is available.

• OAT < SPT

• Economizer Position is NOT forced.

If any of the above conditions are not met, the economizer

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

dmnper moves to minimum position. The operating sequence

is complete. The ECSR is recalculated every 30 seconds.

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

dmnper opens and closes, the power exhaust fans will be

energized and deenergized.

If field-installed accessory CO2 sensors tue connected to

the PremierLink control, a PID-controlled demand ventilation

strategy will begin to operate. As the CO2 level in file 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 calculate the required heat stages (maximum

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

qu_difying conditions are met:

• Indoor fan has been on for at 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 c_dculated; otherwise the required number of heat

stages will be set to 0.

If file PremierLink controller determines that heat stages are

required, the economizer dmnper 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 forat least 10 minutes when HSI 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 mn continuously in the occupied

mode as required by national energy and fresh air standards.

75,

W

744

_: 734

££

nm 724

714

I-

w704

o

694

co 68 J

TEMPERATURE CONTROL

TIME

...... SET POINT

I TEMPERATURE

NOTE: PremierLinkTM control performs smart staging of 2 stages of

DX cooling and up to 3 stages of heat.

Fig. 41 -- DX Cooling Temperature

Control Example

W

OC

W

w

W

o

69

TEMPERATURE CONTROL

75

74 1_.__

73

72 ......... _ .................................... ------COOL SETPO[NT

711 \ /j __ -- TEMPERATURE

704 ........ _v_ .......................... --- HEAT SETPOINT

J

69

68

TIME

Fig. 42 -- Economizer Temperature

Control Example

34

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 pelNonal injury.

Cleaning- Inspect unit interior at beginning of each

heating and cooling season and as operating conditions require.

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

interiol:

EVAPORATOR COIL -- Clean as required with a commer-

cial coil cleanel:

CONDENSER COIL--Clean condenser coil annually and

as required by location and outdoor-air conditions. Inspect coil

monthly -- clean as require&

CONDENSATE DRAIN- Check and clean each year at

start of cooling season. In wintel: keep drains and trap &T.

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.

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 origimd oil charge. A complete re-

ch_uge should be four ounces less than the origimd 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 diag

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 flows. This should be repeated twice to make sure the

proper oil level has been achieved.

FAN SHAFT BEARINGS -- For size 015 units, bearings are

permanently lubricated. No field lubrication is required. For

size 017 units, 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 annu_dly.

Typical lubricants _ue 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 beguings, so no field lubrication is

necessguy.

Evaporator Fan Performance Adjustment

(Fig. 43-45) -- Fan motor pulleys are factory set for speed

shown in Table 1.

To change fan speeds:

1. Shut off unit power supply.

2. a Size 015 Only: Loosen belt by loosening fan motor

mounting plate nuts.

b. Size 017 Only: Loosen nuts on the 2 carriage bolts

in the motor mounting base. Install jacking bolt

and plate under motor base (bolt and plate are

shipped in installer's packet). See Fig, 45. Using

bolt and plate, raise motor to top of slide and

remove belt. Secure motor in this position by tight-

ening the nuts on the carriage bolts.

3. Ix_osen movable-pulley flange setscrew (see Fig. 43).

4. Screw movable flange tow_ud 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 mtcximum speed specified in Table 1.

See Table 14 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

lhll turn of pulley flange.)

6. Replace and tighten belts. See Belt Tension Adjustment

section on page 36.

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 plate.

Evaporator Fan Service and Replacement

50HJ015 UNITS (See Fig. 44)

NOTE: To remove belts only, follow Steps 1-6.

1. Remove filter and supply-air section panels.

2. Remove unit top panel.

3. Ix_osen cguriage nuts A and B holding motor mount as-

sembly to fan scroll side plates.

4. Ix_osen screw C.

5. Rotate motor mount assembly (with motor attached) as

far as possible away from evaporator coil.

6. Remove belt.

PULLEY

PULLEY

BE PARALLEL

WITH BELT

ENSURE PROPER

CLEARANCE BETWEEN

8ELT(_ AND FAN

MOTOR AND FAN

SHAFTS MUST BE

PARALLEL

MOVABLE

FLANGES

SETSCREWS

FIXED FLANGES

SINGLE-GROOVE

Fig. 43 -- Evaporator-Fan Pulley Alignment

and Adjustment

35

7. Rotate motor mount assembly back past original position

tow_ud evaporator coil.

8. Remove motor mounting nuts D and E (both sides).

9. Lift motor up through top of unit.

10. Reverse above procedure to reinstall motol:

11. Check and adjust belt tension as necessary.

50HJ017 UNITS (See Fig. 45)--The 50HJ017 units use a

fan motor mounting system that features a slide-out motor

mounting plate. To replace or service file motor, slide out the

bracket.

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

control access panel.

2. Remove the center post (located between the evaporator

fan and heating control access panels) and all screws se-

curing 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 drive.

6. Remove jacking bolt and tapped jacking bolt plate.

7. Remove the 2 screws that secure the motor mounting

plate to the motor support channel.

8. Remove the 3 screws from file end of the motor support

channel that interfere with the motor slide path.

9. Slide out the motor and motor mounting plate.

10. Disconnect wiring connections and remove the 4 mount-

ing bolts.

11. Remove file motol:

12. To inst_dl the new motor, reveLse Steps 1-11.

MOTOR _.

MOTOR UNIT TOP PANEL

PULLEY D A

FAN

_, PULLEY

FAN SCROLL

SIDE PLATES

DRAIN

CONNECTION

Fig. 44 -- 50HJ015 Evaporator-Fan

Motor Section

FAN PULLEY_

CENTER POST

BELT

MOTOR PULLEY

SUDING MOTOR

MOTOR _PLATE

MOTOR

PLATE

\

MOTORSUPPORT

CHANNEL JACKINGBOLT

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

installer's packet. They should be added to the motor support chan-

nel below the motor mounting plate to aid in raising the motor. The

plate part number is 50DP503842. The adjustment bolt is 3/8- 16 x

13/4 LG.

Fig. 45 -- 50HJ017 Evaporator-Fan Motor Section

Belt Tension Adjustment -- To adjust belt tension:

1. Loosen fan motor bolts.

2. Adjust belt tension:

a. Size 015 Units: Move motor mounting plate up or

down for proper belt tension (1/2 in. deflection with

one finger).

b. Size 017 Units: Turn motor jacking bolt to move

motor mounting plate up or down for proper belt

tension (3/8 in. deflection at midspan with one fin-

ger [9 lb forcel).

3. Tighten nuts.

4. Adjust bolts and nut on mounting plate to secure motor in

fixed position.

Condenser-Fan Adjustment

50HJ015 AND 017 UNITS (Fig. 46)

1. Shut off unit power supply.

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

3. Loosen fan hub setscrews.

4. Adjust fan height on shaft using a straightedge placed

across the fan orifice.

5. Tighten setscrews and replace panel(s).

6. Turn on unit power.

_ 0"62 +-8:_5

NOTE: Dimensions are in inches.

Fig. 46 -- Condenser-Fan Adjustment,

50HJ015,017

36

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

of power failure, &tmpo.s will return to fully closed position

until power is restored. Do not manually operate damper

gO_()E

Refrigerant Charge -- Amount of refligelant chalge is

listed on unit nameplate and in Table 1. Refer to Cmrier GI'AC

II; Module 5; Charging, Recovery, Recycling, and Reclmnation

section for chmging methods and procedures. Unit panels must

be in place when unit is operating during charging procedure.

NOTE: Do not use recycled refligerant as it may contain con-

taminants.

NO CHARGE -- Use standard evacuating techniques. After

evacuating system, weigh in the specified alnount of refriger-

ant (refer to Table 1).

LOW CHARGE COOLING -- Using cooling charging chart

(see Fig. 47), add or remove refrigerant until conditions of the

chmt are met. Note that chmging chmt is different from those

norm;ally used. An accurate pressure gage and temperature-

sensing device is required. Charging is accomplished by ensur-

ing the proper amount of liquid subcooling. Measure liquid line

pressure at the liquid line service valve using pressure gage.

Connect temperature sensing device to the liquid line nero the

liquid line service valve and insulate it so that outdoor ambient

temperature does not affect reading.

BOTH CIRCUITS

ALL OUTDOOR FANS MUST BE OPERATING

50 100 150 200 250 300 350 400

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Fig. 47 -- Cooling Charging Chart

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 intersection point on

chin1 is above line, add refrigerant. If intersection point on

chmt is below line, carefully recover some of the charge. Re-

check suction pressure as charge is adjusted.

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

of unit. All outdoor fans must be operating.

The TXV (thermostatic expansion valve) is set to maintain

between 15 and 20 degrees of superheat at the compressors.

The valves are 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 stan&_rd unit _done. The charge for units with

this option is indicated on the unit nameplate &awing. To

chmge systems using the MoistureMiSer dehumidification

package, fully evacuate, recover, and re-chmge the system to

the nameplate specified charge level. To check or adjust

refrigerant chm'ge on systems using the MoistureMiSer dehu-

midification package, charge per the stan&ud subcooling

charts. The subcooler MUST be deenergized to use the charg-

ing charts. The charts reference a liquid pressure (psig) and

temperature at a point between the condenser coil and the sub-

cooler coil. A tap is provided on the unit to measure liquid

pressure entering the subcooler (leaving the condenser).

Filter Drier -- Replace whenever refrigerant system is ex-

posed to atmosphere.

Protective Devices

COMPRESSOR PROTECTION

Overtemperature -- Each compressor has an intern_fl protec-

tor to protect it against excessively high discharge gas

temperatures.

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.

IIMPORTANT: After prolonged shutdown or servicing, I

energize the crankcase heaters for 24 houLs before stmt- I

ing the compressors.

Compressor Lockout -- If any of the safeties (high-pressure,

low-pressure, freeze protection thermostat, compressor internal

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

the CLO (compressor lockout) will lock the compressors off.

To reset, manu_dly move the thermostat setting.

EVAPORATOR FAN MOTOR PROTECTION -- A manu-

_fl 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 resetting the breakel:

CONDENSER-FAN MOTOR PROTECTION -- Each

condenser-fan motor is internally protected against

overtemperature.

HIGH-PRESSURE AND LOW-PRESSURE SWITCHES --

If either switch trips, or if the compressor overtemperature

switch activates, that refrigerant circuit will be automatically

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

stat setting.

FREEZE PROTECTION THERMOSTAT (FPT) -- An FPT

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

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

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

reenergized.

Relief Devices -- All units have relief devices to protect

against &_mage from excessive pressures (e.g., fire). These de-

vices protect the high and low side.

Control Circuit, 24-7 -- This control circuit is protect-

ed against overcunent by a 3.2-amp circuit breakel: Breaker

can be reset. If it trips, determine cause of trouble before reset-

ting. See Fig. 48 and 49.

Replacement Parts -- A complete list of replacement

parts may be obtained from any Carrier distributor upon

request.

Diagnostic LEDs -- The unit control bo_uds have LEDs

for diagnostic purpose. Refer to Troubleshooting section on

page 41.

37

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 dool_ to facilitate service.

Four external hinged access doors are provided. All extern_d

doors me provided with 2 lalge 1/4 turn latches with folding

bail-type handles. (Compressor access doors have one latch.) A

single door is provided for filter and drive access. One door is

provided for control box access. The control box access door is

interlocked with the non-fused disconnect which must be in the

OFF position to open the dool: Two doors are provided for ac-

cess to the compressor comp_utment.

Two internal access doors are provided inside the tilter/

drive access dool: The filter access door (on the left) is secured

by 2 small 1/4 turn latches with folding bail-type handles. This

door must be opened prior to opening the drive access dool:

The (hive 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 then held

shut by the tilter access door. which closes over it.

38

A

B

C

ELECTRIC HEAT

2081240V 200/230V

AHPS KW

393/453 1411188

7131823 2571342

117/135 42.2/561

_IELD

2eB1_30-3 6e _OWER

SUPPLY

SCHEMATIC

[L[CT_IC_EAT OPTION S_E_L_¢_IC

YE _

H_3

YE

LS

c_ CLO_

I

I

I

I

I

I

I

I

J _'"-£_4 )....

I

I

IL°?_LJ _ct

_rc

ire

Fig. 48 -- Typical Wiring Schematic (50HJ015 208/230 V Shown)

39

AHA

C

CAP

CB

CO

OH

CLO

COMP --

OR

DM

DU

EQUIP --

FL

FPT

FU

GND

HC

HPS

HTR

IAQ

IFC

IFM

IFR

L

LOR

LPS

LS

NEC

OAT

OCCUP --

OFC

OFM

PL

PRI

QT

RAT

SW

TB

TC

TH

TRAN

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[_ ELECTRIC HEAl OPIIOH

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COMPONENT ARRANGEMENT

(A)

I [_ [_]ZL[CTRIC HZAT OPTION lI _ [_[_ZLECTRIC HZAT OP_ IO_ ]i

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(B) (C)

0_°:°I ='%=,

--\ :[]:

LEGEND

Adjustable, Heat Anticipator

Contactor, Compressor

Capacitor

Circuit Breaker

Cooing Compensator

Crankcase Heater

Compressor Lockout

Compressor Motor

Control Relay

Damper Motor

Dummy Terminal

Equipment

Filament

Freeze Protection Thermostat

Fuse

Ground

Heater Contactor

High-Pressure Switch

Heater

Indoor Air Quality Sensor

Indoor Fan Contactor

Indoor Fan Motor

Indoor Fan Relay

Light

Lockout Relay

Low-Pressure Switch

Limit Switch

National Electrical Code

Outdoor Air Temperature Sensor

Occupancy Sensor

Outdoor Fan Contactor

Outdoor Fan Motor

Plug Assembly

Prknary

Quadruple Terminal

Return Air Temperature Sensor

Switch

Terminal Block

Thernlostat Cooling

Thermostat Heating

Transformer

Terminal (Marked)

Terminal (Unmarked)

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• Splice

-- Factory Wiring

Field Control Wiring

.... Accessory or Optional Wiring

To indicate common potential only;

not to represent wiring.

Economizer Motor

Remote POT Field Accessory

OAT Sensor

Disch Air Sensor

RAT Accessory Sensor

Low Ambient Lockout Switch

NOTES:

1. Compressor and/or fan motor(s) thermally protected three phase

motors protected against primary single phasing conditions.

2. If any of the original wire furnished must be replaced, it must be

replaced with Type 90 ° C or its equivalent.

3. Jumpers are omitted when unit is equipped with economizer.

4. IFCB must trip amps is equal to or less than 140% FLA.

5. On TRAN1 use BLK lead for 460-v power supply and ORN lead for

575w power supply.

6. The CLO locks out the compressor to prevent short cycling on corm

pressor 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 normally open contact.

8. 620 Ohm, 1 watt, 5% resistor should be removed only when using

differential enthalpy or dry bulb.

9. If a separate field-supplied 24 v transformer is used for the IAQ

sensor power supply, it cannot have the secondary of the trans-

former grounded.

10. OAT sensor is shipped inside unit and must be relocated in the field

for proper operation.

11. For field installed remote minimum position POT. remove black wire

jumper between P and P1 and set control minimum posgion POT to

the minimum position.

Fig. 49 -- Typical Component Arrangement (50HJ015 Unit Shown)

40

TROUBLESHOOTING

Unit Troubleshooting -- Refer to Tables 19 and 20 for

troubleshooting details.

EconoMiSerlV Troubleshooting-- See Table 21

for EconoMi$erIV logic.

A limctional view of file EconoMiSerIV is shown in Fig. 50.

Typic;d settings, sensor ranges, and jumper positions ;ue also

shown. An EconoMiSerIV simuhttor program is available from

Cartier to help with EconoMiSerlV training and troubleshooting.

ECONOMISERIV PREPARATION -- This procedure is

used to prepare the EconoMiSerIV for troubleshooting. No

troubleshooting or testing is done by performing the following

procedure.

NOTE: This procedure requires a 9-v battery. 1.2 kilo-ohln

resistol: and a 5.6 kilo-ohm resistor which are not supplied

with the EconoMiSerlV.

IMPORTANT: Be sure to record the positions of all poten-tiometers before starting troubleshooting.

1. Disconnect power at TR and TRI. All LEDs should be

off. Exhaust fan contacts should be open.

2. Disconnect device at P and PI.

3. Jumper P to PI.

4. Disconnect wires at T and TI. Place 5.6 kilo-ohm resistor

across T and TI.

5. Jumper TR to 1.

6. Jumper TR to N.

7. 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 lhlly 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 procedme 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

(hive fully closed.

6. Turn the DCV and Exhaust potentiometers CCW until

the Exhaust LED turns on. The exhaust contacts will

close 30 to 120 seconds after the Exhaust LED turns on.

7. Return EconoMiSerlV settings and wiring to norlnal

after completing troubleshooting.

DCV MINIMUM AND MAXIMUM POSITION -- To check

the DCV minimum and maximum position:

1. Make sure EconoMiSerIV preparation procedure has

been performed.

2. Connect a 9-v battery 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

chive fully closed.

8. Return EconoMi$erIV settings and wiring to normal

after completing troubleshooting.

SUPPLY-AIR INPUT -- To check supply-air input:

1. Make sure 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

(hive fully closed.

5. Return EconoMiSerIV settings and wiring to normal

after completing troubleshooting.

ECONOMISER IV 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

potentiometel_ to previous settings.

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

6. Remove 1.2 kilo-ohln checkout resistor from termimfls So

and +. If used, reconnect sensor from tennin_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.

41

Table 19 -- MoistureMi$er TM Dehumidification Subcooler Service Analysis

PROBLEM

Subcooler Will Not Energize

CAUSE

No power to subcooler

control transformer.

No power from subcooler control transformer to

liquid line three-way valve.

Liquid line three-way valve

will not operate.

Subcooler Will Not Deenergize Liquid Line three-way valve

will not close.

Low System Capacity Low refrigerant charge or 1. Check charge amount. See system charging

frosted coil. section.

2, Evaporator coil frosted; check and replace

subcooler control low-pressure switch if necessary.

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 stuck closed; replace.

Valve is stuck open; replace.

42

Table 20-- Cooling Service Analysis

PROBLEM CAUSE REMEDY

Compressor and Power failure. Call power company.

Condenser Fan Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.

Will Not Start. Defective thermostat, contactor, transformer, or control Replace component.

relay.

Insufficient line voltage. Determine cause and correct.

Incorrect or faulty wiring. Check wiring diagram and rewire correctly.

Thermostat setting too high. Lower thermostat setting below room temperature.

Compressor Will Not Faulty wiring or loose connections in compressor circuit. Check wiring and repair or replace.

Start but Condenser Fan Compressor motor burned out, seized, or internal over- Determine cause. Replace compressor.

Runs. load open.

Defective overload. Determine cause and replace.

Compressor locked out Determine cause for safety trip and reset lockout.

One leg of 3-phase power dead. Replace fuse or reset circuit breaker.

Determine cause.

Compressor Cycles Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge

(other than normally to nameplate.

satisfying thermostat). Defective compressor. Replace and determine cause.

Insufficient line voltage. Determine cause and correct.

Blocked condenser. Determine cause and correct.

Defective overload. Determine cause and replace.

Defective thermostat. Replace thermostat.

Faulty 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 Dirty air filter. Replace filter.

Pressure. Dirty condenser coil. Clean coil.

Refrigerant overcharged. Recover excess refrigerant.

Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

suction line.

2. Replace TXV if stuck open or closed.

Air in system. Recover refrigerant, evacuate system, and recharge.

Condenser air restricted or air short-cycling. Determine cause and correct.

Head Pressure Too Low. Low refrigerant charge. Check for leaks, repair, and recharge.

Restriction in liquid tube. Remove restriction.

Excessive Suction High heat load. Check for source and eliminate.

Pressure. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

suction line.

2. Replace TXV if stuck open or closed.

Refrigerant overcharged. Recover excess refrigerant.

Suction Pressure Too Dirty air filter. Replace filter.

Low. Low refrigerant charge. Check for leaks, repair, and recharge.

Metering device or low side restricted. Remove source of restriction.

Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

suction line.

2. Replace TXV if stuck open or closed.

Insufficient evaporator airflow. Increase air quantity. Check filter and replace if

necessary.

Temperature too low in conditioned area. Reset thermostat.

Field-installed filter drier restricted. Replace.

LEGEND

TXV -- Thermostatic Expansion Valve

43

Table 21 -- 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 control, the module compares

enthalpy to the ABCD set point.

tPower at N terminal determines Occupied/Unoccupied

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

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

1-tModulation is based on the DCV signal.

OUTPUTS

NTerminalt

Occupied

Minimum position

Modulating** (between rain.

position and full-open)

Minimum position

Modulating1-1- (between min.

position and DCV maximum)

Modulating***

Unoccupied

Dam )er

Closed

Modulating** (between

closed and full-open)

Closed

Modulatingtl- (between

closed and DCV

maximum)

Modulatingtl-t

outdoor

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).

ttl-Modulation 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. 50 -- EconoMi$erlV Functional View

44

Air quantity limits 31

Carrier Comfort Network® 12

Changeover setpoint 21

Charging chart, refrigerant 37

Clearance 4, 5

CO2 sensor

Configuration 24

Settings 23, 25

Compressor

Lockout 20

Lubrication 35

Mounting 28

Rotation 28

Concentric duct 7

Condensate drain

Cleaning 35

Location 7, 8

Condenser coil 6

Cleaning 35

Condenser tim 6

Ac[iustment 36

Control circuit 37

Wiring 8

Convenience outlet 10

Crankcase heater 28, 37

Demand control ventilation 24

Dehumidification 24

Dfinensions 2, 3, 5

DuctwoN 4

EconoMiSerIV 18-24

Control mode 21

Controller wiring 19

Damper movement 23

Demand ventilation control 24

Enthalpy sensor 22

Troubleshooting 41, 44

Usage 21

Wiring 19

EconoMiSer2 18-20

Electrical connections 8

Electrical data 9

Electric heat 10

Enthalpy changeover set points 22

Evaporator coil 6

Cleaning 35

Evaporator fan motor

Lubrication 35

Motor data 32

Mounting 36

Performance 29-31

Pulley adjustment 35, 36

Pulley setting 6, 32

Speed 6

Filter

Cleaning 35

Size 6

Filter drier 37

Freeze protection thermostat 6, 37

Heat anticipator settings 10

High-pressure switch 6, 37

Hinged access door 38

Horizontal adapter roof curb 3

Humidistat 26

Indoor air quality sensor 12

Ix_w-pressure switch 6, 37

Manual outdoor air damper 10

MoistureMiSer TM dehumidification

package 25-2Z 37, 42

Motormaster® I control 11, 12

Mounting

Compressor 28

Unit 4

Non-fused disconnect 10

INDEX

Operating sequence 33, 34

Cooling 33

EconoMi$erlV 33

EconoMi$er2 with

PremierLinkcontrol 33,34

Heating 33

Outdoor air hood lO, 11

Outdoor air temperature sensor 12,20

Outdoor air inlet screens

Cleaning 35

Dimensions 6

Physical data 6

Power supply 8

Wiring 8

PmmierLink controls 12-16

Pressure, drop

Electric heat 32

Economizer 32

MoistureMiSer 32

Pressure switches

High pressure 6

Low pressure 6

Refrigerant

Cha_e 37

Type 6

Refrigerant sel_,ice ports 28

Replacement parts 37

Return air filter 6

Return air temperature sensor 22

Rigging unit 4

Roof curb

Assembly 1

Dimensions 2

Leveling tolerances 2

Weight 6

Safety considerations 1

Sew,ice 35-40

Start-up 28-34

Start-up checklist CL-1

Supply-air temperature sensor 12, 20

Thermostat 8, 23

Troubleshooting 41-44

Weight

Corner 5

Economizer 6

Maximum 4

Unit 6

Wind baffle 11

Wiring

EconoMi$erIV 19

EconoMi$er2 20

Humidistat 26

Nou-fused disconnect 10

Power connections 8

PremierLink 14

Thermostat 8

Unit 39, 40

45

SERVICE TRAINING

Packaged Service Training programs ate an excellent way to increase your knowledge of the equipment

discussed in this manual, including:

• Unit Fmnilimization

• InstCdlation Overview

• Maintenance

• Operating Sequence

A large selection of product, theoty, and skills programs ;u'e available, using popular video-based formats

and materials. All include video and/or slides, plus companion book.

Classroom Service Training which includes "hands-on" experience with the products in our labs can

mean increased confidence thai really pays dividends in faster troubleshooting and fewer callbacks. Course

descriptions and schedules are in our catalog.

CALL FOR FREE CATALOG 1-800-644-5544

I Packaged Service Training [ I Classroom Service Training

Copyright 2006 Carrier Corporation

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

Catalog No. 04-53500012-01 Printed in U.S.A. Form 50HJ-29SI Pg 46 3-06 Replaces: 50HJ-25SI

MODEL NO.:

DATE:

START-UP CHECKLIST

SERIAL NO.:

TECHNICIAN:

I. PRE-START-UP:

[] VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

[] VERIFY INSTALLATION OF INDOOR FAN MOTOR ADJUSTMENT BOLT (015 UNITS) OR ADJUSTMENT

BOLT AND PLATE (017 UNITS)

[] VERIFY INSTALLATION OF OUTDOOR AIR 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 SET SCREW

IS TIGHT

[] VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

[] VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRECT DIRECTION

[] VERIFY THAT CRANKCASE HEATER HAS BEEN ENERGIZED FOR 24 HOURS

II. START-UP:

ELECTRICAL

SUPPLY VOLTAGE

COMPRESSOR AMPS -- COMPRESSOR NO. 1

-- COMPRESSOR NO. 2

LI-L2 L2-L3 L3-LI

LI L2 L3

LI L2 L3

SUPPLY FAN AMPS EXHAUST FAN AMPS

ELECTRIC HEAT AMPS (IF SO EQUIPPED) Ll L2 L3

TEMPERATU RES

OUTDOOR-AIR TEMPERATURE F DB (Dry-Bulb)

RETURN-AIR TEMPERATURE F DB

COOLING SUPPLY AIR F

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 37.

PSIG

PSIG

GENERAL

[] ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS

[] VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES

Copyright 2006 Carrier Corporation

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, 04-53500012-01 Printed in U.S,A. Form 50HJ-29SI Pg CL-1 3-06 Replaces: 50HJ-25SI

Tab 1b 16b

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