Carrier 50hjq014 Dimensions and installation guide

Installation, Start-Up

and Service Instructions

CONTENTS Page

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

INSTALLATION .............................1-11

Step 1 — Provide Unit Support ............... 1

• ROOF CURB

• ALTERNATE UNIT SUPPORT

Step 2 — Rig and Place Unit ..................1

• POSITIONING

• ROOF MOUNT

Step 3 — Field Fabricate Ductwork ............1

Step 4 — Make Unit Duct Connections ........3

Step5—TrapCondensate Drain .............3

Step 6 — Make Electrical Connections ........3

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

Step 7 — Make Outdoor-Air Inlet

Adjustments ................................8

• MANUAL OUTDOOR-AIR DAMPER

• OPTIONAL FACTORY-INSTALLED

ECONOMIZER

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

Step 9 — Defrost Cycle ......................10

START-UP ................................12-16

SERVICE ..................................17-21

TROUBLESHOOTING ......................21-27

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

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment

can be hazardous due to system pressure and electrical com-

ponents. Only trained and qualiﬁed service personnel should

install, repair, or service air-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, ob-

serve 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 ex-

tinguishers available for all brazing operations.

Before performing service or maintenance operations on

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

could cause personal injury.

INSTALLATION

Step 1 — Provide Unit Support

ROOF CURB — Assemble and install accessory roof curb

in accordance with instructions shipped with the curb.

Accessory roof curb and information required to ﬁeld

fabricate a roof curb are shown in Fig. 1 and 2. Install in-

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

Ductwork can be secured to roof curb before unit is set in

place. Horizontal adapter installation is shown in Fig. 3.

IMPORTANT: The gasketing of the unit to the roof

curb is critical for a watertight seal. Install gasket sup-

plied with the roof curb as shown in Fig. 1. Improp-

erly applied gasket can result in air leaks and poor unit

performance.

Curb should be level. This is necessary to permit unit drain

to function properly. Unit leveling tolerance is 6

⁄

in. per

linear ft in any direction. Refer to Accessory Roof Curb In-

stallation Instructions for additional information as required.

ALTERNATE UNIT SUPPORT — When the curb cannot

be used, support unit with sleepers using unit curb support

area. If sleepers cannot be used, support long sides of unit

with a minimum of 3 equally spaced 4-in. x 4-in. pads on

each side.

Step2—RigandPlace Unit — Inspect unit for trans-

portation damage. File any claim with transportation agency.

Keep unit upright, and do not drop. Use spreader bars over

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

to move unit across a roof. Level by using unit frame as a

reference; leveling tolerance is 6

⁄

in. per linear ft in any

direction. See Fig. 1 for additional leveling tolerance infor-

mation. Unit weight is shown in Table 1.

Four lifting holes are provided in ends of unit base rails

as shown in Fig. 4. Refer to rigging instructions on unit.

POSITIONING — Provide clearance around and above unit

for airﬂow, safety, and service access (Fig. 5 and 6).

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

inlets near exhaust vents or other sources of contaminated

air.

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

ROOF MOUNT — Check building codes for weight distri-

bution requirements.

Step 3 — Field Fabricate Ductwork — Secure all

ducts to building structure. Use ﬂexible duct connectors be-

tween unit and ducts as required. Insulate and weatherproof

all external ductwork, joints, and roof openings with counter

ﬂashing and mastic in accordance with applicable codes.

50HJQ014,016

Single-Package Rooftop

Heat Pump Units

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

Book 1 4

Tab 5a 5a PC 111 Catalog No. 565-001 Printed in U.S.A. Form 50HJQ-5SI Pg 1 2-97 Replaces: 50HJQ-3SI

ACCESSORY

PACKAGE NO. CURB

HEIGHT DESCRIPTION ‘‘A’’ ‘‘B’’ ‘‘C’’

50PQ900221 18-29

(305) Standard Curb —

149High ———

50PQ900141 28-09

(610) Standard Curb

for Units Requiring

High Installation ———

50PQ900151 28-09

(610) Horizontal Supply

and Return Curb 58-69

(1676) 08-2

⁄

(64) 18-69

(457)

50DP900211 18-119

(584) Pre-Assembled,

High-Static,

Horizontal Adapter 68-29

(1880) 08-6

⁄

(159) 18-2

⁄

(371)

LEGEND

COMP SECT. — Compressor Section

NOTES:

1. Roof curb accessory is shipped unassembled.

2. Insulated panels,

⁄

-in. thick neoprene-coated, 2 lb density.

3. Dimensions in ( ) are in millimeters.

4. Direction of airﬂow.

5. Roof curb: 18 gage steel.

6. Attach all ductwork to roof curb.

NOTE: To prevent the hazard of stagnant water build-up in the drain pan of the

indoor-air section, unit can only be pitched as shown.

Fig. 1 — Roof Curbs and Horizontal Adapter Details

Ducts passing through an unconditioned space must be

insulated and covered with a vapor barrier.

The 50HJQ units with electric heat require a 1-in. clear-

ance for the ﬁrst 24 in. of ductwork.

Outlet grilles must not lie directly below unit discharge.

Step 4 — Make Unit Duct Connections — Unit

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

work openings are shown in Fig. 7. Field-fabricated concen-

tric ductwork may be connected as shown in Fig. 8 and 9.

Attach all ductwork to roof curb and roof curb basepans.

Refer to installation instructions shipped with accessory roof

curb for more information.

Step5—TrapCondensate Drain — See Fig. 5

or 6 and 10 for drain location. Plug is provided in drain hole

and must be removed when unit is operating. One

⁄

-in. half coupling is provided inside unit indoor air section

for condensate drain connection. An 8

⁄

in. x

⁄

-in. diam-

eter nipple and a 2-in. x

⁄

-in. diameter pipe nipple are coupled

to standard

⁄

-in. diameter elbows to provide a straight path

down through holes in unit base rails (see Fig. 11). A trap at

least 4-in. deep must be used.

Step 6 — Make Electrical Connections

FIELD POWER SUPPLY — Unit is factory wired for volt-

age shown on nameplate.

When installing units, provide a disconnect of adequate

size per NEC (National Electrical Code) requirements

(Table 2).

All ﬁeld wiring must comply with NEC and local

requirements.

Route power lines through control box access panel or unit

basepan (Fig. 5 and 6) to connections as shown on unit wir-

ing diagram and Fig. 12.

NOTE: For preassembled horizontal adapter (part no. 50DP900211),

theaccessorykitincludesafactory-assembled,high-static,regaintran-

sition duct. For horizontal roof (part no. 50PQ900151), a ﬁeld-

supplied transition duct is required.

Fig. 2 — Horizontal Supply/Return Curb and

Horizontal Adapter Details

NOTE: Part no. 50DP900211 is a fully factory preassembled horizon-

tal adapter which includes an insulated high static regain transition

duct and substantially improves fan static performance.

Fig. 3 — Dimensional Drawing — Horizontal Adapter

Installation

UNIT 50HJQ MAXIMUM

SHIPPING WEIGHT

Lb Kg

014 1895 860

016 2205 1000

DIMENSION A

UNIT 50HJQ Ft-in. mm

014 3-1 948

016 3-6 1059

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

postfrompackagingtoprotectcoil fromdamage.Usebumper boards

for spreader bars.

5. Weightsdo not include optionaleconomizer.SeeTable 1forecono-

mizer weight.

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

per condenser coil plate ﬁns. Weights of other metal combinations

are listed in Table 1.

All panels must be in place when rigging.

Fig. 4 — Rigging Details

Table 1 — Physical Data

UNIT SIZE 50HJQ 014 016

208/230, 460 V 575 V

OPERATING WT (lb)

Al/Al* 1615 1925

Al/Al Coated* 1615 1925

Unit Al/Cu* 1745 2075

Cu/Cu* 1815 2165

Electric Heat 65 65

Economizer 110 110

Roof Curb† 200 200

COMPRESSOR Semi-Hermetic

Type (Number) 06D-328 (1) 060-818 (2)

Cylinders 64

Oil Charge (oz.) (each circuit) 115 88

REFRIGERANT TYPE R-22

Charge (lb)

System 1 26.0 16.5

System 2 — 16.5

OUTDOOR COIL

⁄

in., Internally-Grooved Copper Tubes, Aluminum or Copper Lanced Fins

Rows 33

Fins/in. 15 15

Total Face Area (sq ft) 21.7 21.7

OUTDOOR FAN Propeller Type, Direct Drive

Nominal Cfm 9,000 9,000

Number...Diameter (in.) 3...22 3...22

Motor Hp (1075 Rpm)

⁄

Watts Input (Total) 1090 1090

INDOOR COIL

⁄

in., Internally-Grooved Copper Tubes, Aluminum or Copper Lanced Fins, Face Split

Expansion Device Fixed Oriﬁce

Rows 33

Fins/in. 15 15

Total Face Area (sq ft) 17.5 17.5

INDOOR FAN Centrifugal, Adjustable Pitch Belt Drive

Quantity...Size (in.) 2...10 x 10 2...10 x 10 2...12 x 12

Nominal Cfm 5000 5000 6000

Fan Rpm Range 862-1132 1201-1462 799-1010

Maximum Allowable Rpm 1550 1550 1550

Motor Pulley Pitch Diameter (in.) 3.1/4.1 4.3/5.3 3.7/4.7

Fan Pulley Pitch Diameter (in.) 6.0 6.4 11.4

Belt, Quantity...Type...Length (in.) 1...BX...42 1...B...45 1...BX...46

Pulley Center Line Distance (in.) 13.5-15.5 13.5-15.5 13.3-14.8

Speed Change Per Turn (rpm) 54 52 42

Pulley Maximum Full Turns 6** 5 6**

Factory Pulley Turns Setting 33

⁄

Factory Speed Setting (Rpm) 1024 1279 926

Fan Shaft Diameter (in.) 1

⁄

Motor Hp (Service Factor) 3.7 (1.15) 3.0 (1.15) 5.0 (1.15)

Motor Frame Size 56H 56H 184T

Motor Efficiency 0.84 0.84 0.84

HIGH-PRESSURE SWITCH

Cutout (psig) 426

Reset (psig) 320

LOW-PRESSURE/LOSS-OF-CHARGE SWITCH

Cutout (psig) 7

Reset (psig) 22

AIR INLET SCREENS Cleanable

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

1...20 x 20 x 1

RETURN-AIR FILTERS (TYPE) 10% Efficient — 2-in. Throwaway Fiberglass

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

4...16 x 20 x 2

DEFROST THERMOSTAT

Defrost Time 30 min (Adjustable to 50 or 90 min)

Closes (F) 28

Opens (F) 65

LEGEND

Al — Aluminum

Cu — Copper

*Indoor coil ﬁn material/outdoor coil ﬁn material.

†Weight of 14 in. roof curb.

**Pulley cannot be run at 0 or

⁄

turns open.

NOTES:

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in ( ) are in millimeters.

3. Center of gravity.

4. Direction of airﬂow.

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

6. Minimum clearance:

• Rear: 78-09(2134) for coil removal. This dimension can be

reduced to 48-09(1219) if conditions permit coil removal

from the top.

• Left side: 48-09(1219) for proper outdoor coil airﬂow.

• Front: 48-09(1219) for control box access.

• Rightside: 48-09(1219)forproper operation of damper and

power exhaust (if so equipped).

• Top: 68-09(1829) to assure proper outdoor fan operation.

• Local codes or jurisdiction may prevail.

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

damper/ power exhaust as stated in note no. 6, a removable

fence or barricade requires no clearance.

8. Dimensions are from outside of corner post. Allow 08-

⁄

(8) on each side for top cover drip edge.

STANDARD UNIT WEIGHT ECONOMIZER WEIGHT

1615 lb (733 kg) 110 lb (50 kg)

Fig. 5 — Base Unit Dimensions — 50HJQ014

NOTES:

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in ( ) are in millimeters.

3. Center of gravity.

4. Direction of airﬂow.

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

6. Minimum clearance:

• Rear: 78-09(2134) for coil removal. This dimension can be

reduced to 48-09(1219) if conditions permit coil removal

from the top.

• Left side: 48-09(1219) for proper outdoor coil airﬂow.

• Front: 48-09(1219) for control box access.

• Rightside: 48-09(1219)forproper operation of damper and

power exhaust (if so equipped).

• Top: 68-09(1829) to assure proper outdoor fan operation.

• Local codes or jurisdiction may prevail.

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

damper/ power exhaust as stated in note no. 6, a removable

fence or barricade requires no clearance.

8. Dimensions are from outside of corner post. Allow 08-

⁄

(8) on each side for top cover drip edge.

STANDARD UNIT WEIGHT ECONOMIZER WEIGHT

1925 lb (874 kg) 110 lb (50 kg)

Fig. 6 — Base Unit Dimensions — 50HJQ016

Transformers no. 1 and 2 are wired for 230-v unit. If 208/

230-v unit is to be run with 208-v power supply, the trans-

formers must be rewired as follows:

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

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

3. Replace orange wire with red wire.

4. Recap both wires.

IMPORTANT: BE CERTAIN UNUSED WIRES

ARE CAPPED. Failure to do so may damage the

transformers.

Operating voltage to compressor must be within voltage

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

ages between phases must be balanced within 2% and the

current must be balanced within 10%.

Use the following formula to determine the percentage of

voltage imbalance.

Percentage of Voltage Imbalance

= 100 x max voltage deviation from average voltage

average voltage

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage = 452 + 464 + 455

=1371

= 457

Determine maximum deviation from average voltage:

(AB) 457 − 452 = 5 v

(BC) 464 − 457 = 7 v

(AC) 457 − 455 = 2 v

Maximum deviation is 7 v.

Determine the percentage of voltage imbalance:

Percentage of Voltage Imbalance = 100 x 7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is be

low the maximum allowable 2%.

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

water leak.

Fig. 7 — Air Distribution — Through-the-Bottom

(50HJQ016 Shown)

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

water leak.

Fig. 8 — Concentric Duct Air Distribution

(50HJQ016 Shown)

Shaded area indicates block-off panels.

NOTE: Dimensions A, A8and B, B8are obtained from ﬁeld-supplied

ceiling diffuser.

Fig. 9 — Concentric Duct Details

3/4" FPT DRAIN

CONNECTION 1-3/8"

DRAIN HOLES

Fig. 10 — Condensate Drain Details

IMPORTANT: If the supply voltage phase imbalance

is more than 2%, contact your local electric utility com-

pany immediately.

Unit failure as a result of operation on improper line volt-

age or excessive phase imbalance constitutes abuse and may

cause damage to electrical components.

FIELD CONTROL WIRING — Install a Carrier-approved

accessory thermostat assembly according to the installation

instructions included with the accessory. Refer to unit Price

Pages or contact your local representative for more infor-

mation. Locate thermostat assembly on a solid wall in the

conditioned space to sense average temperature.

Route thermostat cable or equivalent single leads of

no. 18 AWG (American Wire Gage) colored wire from

subbase terminals through conduit in unit to low-voltage con-

nections as shown on unit label wiring diagram and in

Fig. 13.

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

wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG in-

sulated wire (35 C minimum). For over 75 ft, 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 3. Set-

tings may be changed slightly to provide a greater degree of

comfort for a particular installation.

Refer to accessory remote control instructions as

required.

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-air damper to provide ventilation air. Damper

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

compartment. To adjust, loosen securing screws and move

damper to desired setting. Then retighten screws to secure

damper (Fig. 14).

OPTIONAL FACTORY-INSTALLED ECONOMIZER

Economizer Motor Control Module (Fig. 15-17) — Set to

the ‘‘D’’ setting (Fig. 16). The control module is located on

the economizer motor. See Fig. 15 and 17.

Damper Vent Position Setting

1. Set fan switch at ON position (continuous fan operation),

and close night switch if used.

2. Set system selector switch to OFF position.

3. Turn adjustment screw slowly until dampers assume de-

sired vent position. Do not manually operate economizer

motor since damage to motor will result.

NOTE: Refer to accessory installation instructions included

with the ﬁeld-installed economizer for installation informa-

tion. Also see Economizer Adjustment section on page 18.

Step 8 — Install Outdoor-Air Hood — The same

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

ventilation and units with an economizer.

NOTE: The hood top panel, upper and lower ﬁlter retain-

ers, hood drain pan, and ﬁlter support bracket are secured

opposite the outdoor air end of the unit. The screens, hood

side panels, remaining section of ﬁlter support bracket, seal

strip, and all other hardware are in a package located inside

the return-air ﬁlter access panel (Fig. 18).

1. Attach seal strip to upper ﬁlter retainer. See Fig. 19.

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

tainer, and hood drain pan (Fig. 20).

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

port bracket to unit. See Fig. 20. Tighten screws.

4. Loosen sheet metal screws for base unit top panel located

above outdoor-air inlet opening.

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

Insert hood ﬂange between unit top panel ﬂange and unit.

Tighten screws.

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

ated by lower ﬁlter retainer and ﬁlter support bracket.

7. Attach remaining shorter section section of ﬁlter support

bracket.

Fig. 11 — Condensate Drain Piping Details

LEGEND

EQUIP GND — Equipment Ground

kcmil — Thousand Circular Mils

NEC — National Electrical Code

TB — Terminal Block

NOTE: The maximum wire size for TB1 is 350 kcmil for all unit

voltages.

Fig. 12 — Field Power Wiring Connections

Table 2 — Electrical Data

UNIT

50HJQ VOLTAGE

(3 Ph,

60 Hz)

VOLTAGE

RANGE COMPRESSOR OUTDOOR

FAN

MOTOR INDOOR FAN

MOTOR POWER

EXHAUST ELECTRIC HEAT* POWER SUPPLY DISCONNECT

SIZING

No. 1 No. 2

Min Max RLA LRA RLA LRA Qty FLA

(ea) Hp FLA FLA LRA FLA kW MCA MOCP† RLA LRA

014

208/230 187 253 39.7 228 — — 3 1.7 3.7 10.5/10.5

—— —/—

39/ 45

72/ 82

117/135

—/—

14/19

26/34

42/56

65/ 65

114/122

155/168

211/200

100/100

125/150

175/175

225/225

64/ 64

94/107

147/167 387/387

4.6 18.8 —/—

39/ 45

72/ 82

117/135

—/—

14/19

26/34

42/56

70/ 70

119/126

159/173

216/205

100/100

125/150

175/175

225/225

69/ 69

100/112

152/173 406/406

460 414 508 19.9 114 — — 3 0.8 3.7 4.8

—— —

—

110

82 189

2.3 6.0 —

—

100

110

84 195

575 518 632 16.0 91 — — 3 0.75 3.0 3.9 —— —

37 —

37 26

72 40

80 26

47 91

2.1 4.8 —

37 —

37 28

75 40

80 28

50 96

016

208/230 187 253 28.2 160 28.2 160 3 1.7 5 15.8/15.8

—— —/—

72/ 82

117/135

—/—

26/34

42/56

84/ 84

174/187

231/219

110/110

175/200

250/225

89/ 89

101/112

153/173 499/485

4.6 18.8 —/—

72/ 82

117/135

—/—

26/34

42/56

89/ 89

179/191

235/224

110/110

200/200

250/225

94/ 94

106/118

158/179 518/504

460 414 508 14.1 80 14.1 80 3 0.8 5 7.9

—— —

—

108

100

110

85 238

2.3 6.0 —

—

110

100

125

88 244

575 518 632 11.3 64 11.3 64 3 0.75 5 6.0 —— —

50 —

50 34

96 40

100 35

64 165

2.1 4.8 —

50 —

50 36

98 45

100 38

67 169

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code

RLA — Rated Load Amps

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

600 v. If power distribution voltage to unit varies from rated heater voltage,

heater kW will vary accordingly.

†Fuse or HACR circuit breaker. This is the maximum size permissible; smaller

fuse size may be used where conditions permit.

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. The Canadian units may

be fuse or circuit breaker.

2. MCA calculation for units with electric heaters over 50 kW

= (1.25 x IFM amps) + (1.00 x heater FLA).

Table 3 — Heat Anticipator Settings

UNIT 50HJQ UNIT

VOLTAGE HEATER

kW STAGE 1 STAGE 2

014

208/230 14/19 .40 —

26/34 .40 .40

42/56 .66 .40

460 15 .40 —

32 .40 .40

55 .40 .66

575 37 .40 .66

016

208/230 26/34 .40 .66

42/56 .66 .40

460 32 .40 .40

55 .40 .66

575 50 .66 .66

Step 9 — Defrost Cycle — The defrost timer is fac-

tory set at 30 minutes. The timer may be ﬁeld-adjusted to

50 or 90 minutes by moving the wire from the 30 minute

contact to the 50 or 90 minute contact.At the end of the time

period, the defrost cycle will begin. See Fig. 21.

Fig. 13 — Field Control Thermostat Wiring

Fig. 14 — 25% Outdoor-Air Section Details

OUTDOOR

AIR

THERMOSTAT

Fig.15 — Economizer DamperAssembly — End View

LED — Light Emitting Diode

Fig. 16 — Economizer Control Module

Fig. 17 — Economizer Control Module Location

Fig. 18 — Outdoor-Air Hood

Component Location

Fig. 19 — Seal Strip Location

(Air Hood Cross-Sectional View)

HOOD TOP

PANEL

HOOD SIDE

PANELS (2)

LOWER

FILTER

RETAINER

FILTER SUPPORT

BRACKET

HOOD DRAIN PAN

UPPER FILTER RETAINER

LOWER FILTER

RETAINER

FILTER SUPPORT

BRACKET

NOTE: The outdoor-air hood kit contains a baffle which is not used

on the 50HJQ units. Discard the baffle.

Fig. 20 — Outdoor-Air Hood Details

CTD

LOGIC

DFT

TEST

OF1

DEFROST BOARD

OF2

DEFROST

CYCLE TIME

ADJUSTMENT

WIRE

Fig. 21 — Defrost Board Timer Wiring

START-UP

Use the following information and complete Start-Up

Checklist on page CL-1 to check out unit PRIOR to start-up.

Unit Preparation — Check that unit has been installed

in accordance with these installation instructions and all

applicable codes.

Compressor Mounting — Loosen compressor hold-

down bolts until sideways movement of the washer

under each holddown bolt head can be obtained. Do not loosen

completely, as bolts are self-locking and will maintain

adjustment.

Internal Wiring — Check all electrical connections in

unit control boxes; tighten as required.

Refrigerant Service Ports and Valves — Each

50HJQ unit has 2 Schrader-type service ports per circuit; one

on the suction line and one on the liquid line. Be sure that

the caps on the ports are tight. The units also have 2 service

valves per circuit; one on the suction line and one on the

discharge line. Be sure all valves are open.

Crankcase Heaters — Heaters are energized as long

as there is power to unit.

IMPORTANT: Unit power must be on for 24 hours

prior to start-up. Otherwise, damage to compressor may

result.

Indoor Fan — Fan belt and pulleys are factory installed.

Remove tape from the fan pulley and adjust pulleys on

50HJQ014 units as required. See Indoor-Fan, 50HJQ014 Units

section on page 17. See Table 4 for Air Quantity Limits. See

Tables 5A, 5B, and 6 for Fan Performance data. Be sure that

fans rotate in the proper direction. See Table 7 for static pres-

sure drops for accessories and options. See Fig. 22 and 23

for fan performance using horizontal adapter and power ex-

haust. See Table 8 for fan rpm pulley settings. To alter fan

performance, see Indoor-Fan, 50HJQ014 Units and Indoor-

fan, 50HJQ016 Units sections, page 17.

Table 4 — Air Quantity Limits

UNIT 50HJQ MINIMUM CFM MAXIMUM CFM

014 3750 6250

016 4500* 7500

*Minimum cfm is 5600 when electric heater is used.

Table 5A — Fan Performance Data, 50HJQ014; 208/230, 460 V Units

AIRFLOW

(Cfm)

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

3750 724 481 0.55 838 685 0.78 937 889 1.01 1028 1097 1.25 1111 1309 1.49

4000 754 613 0.70 865 824 0.94 962 1034 1.18 1050 1247 1.42 1131 1463 1.67

4250 786 757 0.86 893 975 1.11 987 1191 1.36 1073 1408 1.60 1152 1629 1.86

4500 818 914 1.04 922 1138 1.30 1013 1360 1.55 1097 1583 1.80 1174 1808 2.06

4750 850 1084 1.23 951 1313 1.50 1040 1541 1.76 1122 1770 2.02 1197 2000 2.28

5000 883 1267 1.44 980 1501 1.71 1068 1736 1.98 1147 1969 2.24 1221 2204 2.51

5250 917 1464 1.67 1011 1703 1.94 1096 1943 2.21 1174 2183 2.49 1246 2423 2.76

5500 950 1675 1.91 1041 1918 2.19 1124 2165 2.47 1201 2409 2.75 1272 2655 3.02

5750 985 1901 2.17 1072 2147 2.45 1153 2400 2.73 1228 2650 3.02 1298 2901 3.31

6000 1020 2142 2.44 1103 2391 2.72 1183 2649 3.02 1256 2905 3.31 1324 3160 3.60

6250 1055 2398 2.73 1135 2650 3.02 1213 2912 3.32 1284 3175 3.62 1352 3435 3.91

Table 5A — Fan Performance Data, 50HJQ014; 208/230, 460 V Units (cont)

AIRFLOW

(Cfm)

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

3750 1190 1526 1.74 1265 1746 1.99 1337 1972 2.25 1405 2199 2.51 1471 2431 2.77

4000 1208 1684 1.92 1281 1908 2.17 1351 2136 2.43 1418 2368 2.70 1483 2603 2.97

4250 1227 1853 2.11 1299 2082 2.37 1367 2313 2.64 1433 2548 2.90 1496 2787 3.18

4500 1247 2036 2.32 1317 2268 2.58 1384 2503 2.85 1448 2742 3.12 1510 2983 3.40

4750 1269 2232 2.54 1337 2468 2.81 1403 2707 3.08 1465 2948 3.36 1526 3194 3.64

5000 1291 2441 2.78 1358 2680 3.05 1422 2923 3.33 1484 3168 3.61 1544 3418 3.89

5250 1315 2664 3.03 1380 2907 3.31 1443 3154 3.59 1503 3403 3.88 1562 3655 4.16

5500 1339 2900 3.30 1403 3148 3.59 1464 3398 3.87 1524 3651 4.16 ———

5750 1364 3151 3.59 1426 3403 3.88 1486 3657 4.17 1545 3914 4.46 — — —

6000 1389 3416 3.89 1450 3672 4.18 1510 3930 4.48 — — — — — —

6250 1415 3695 4.21 1476 3957 4.51 1534 4219 4.81 — — — — — —

LEGEND

Bhp — Brake Horsepower Input to Fan

FIOP — Factory-Installed Option

Watts — Input Watts to Motor

NOTES:

1. Boldface indicates ﬁeld-supplied drive required.

2. indicates ﬁeld-supplied motor and drive required.

3. Factory-shipped motor drive range is 862 to 1132 rpm. Other rpms

may require a ﬁeld-supplied drive.

4. Maximum continuous bhp is 4.25 and maximum continuous watts

are 3775. Do not adjust motor rpm such that motor maximum bhp

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

5. Static pressure losses (i.e., economizer) must be added to exter-

nal static pressure before entering Fan Performance table.

6. Interpolation is permissible. Do not extrapolate.

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

losses. See Table 7 for accessory/FIOP static pressure

information.

8. Extensive motor and drive testing on these units ensures that the

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

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

shown will not result in nuisance tripping or premature motor fail-

ure. Unit warranty will not be affected.

Table 5B — Fan Performance Data, 50HJQ014; 575 V Units