Carrier 50QQ User Manual

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50QQ

HEATING A COOLING

Single-Package Heat Pumps

Installation, Start-Up and Service Instructions

Page

SAFETY CONSIDERATION

INSTALLATION..................................................................1-7

Step 1—Check Equipment and Jobsite............................. 1

• UNPACK UNIT

• INSPECT EQUIPMENT

• COMPLETE SYSTEM REQUIREMENTS

Step 2—Mount Unit.............................................................. 2

• ON THE GROUND

• ON THE ROOF

Step 3—Make Ductwork Connections

• CONNECT RETURN AND SUPPLY AIR

DUCTWORK

Step 4—Provide for Cooling Cycle

Condensate Disposal

• CONNECT DRAIN LINE

Step 5—Make Electrical Connections

• INSTALL A BRANCH CIRCUIT DISCONNECT PER

NEC

• ROUTE LINE POWER LEADS INTO UNIT

• CONNECT GROUND LEAD TO GROUND LUG

• SET INDOOR FAN MOTOR SPEED

• ROUTE CONTROL POWER WIRES

• ACCESSORY DUCT FLANGE KIT INSTALLATION

• ELECTRIC HEATER INSTALLATION

START-UP

SERVICE...........................................................................8-15

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

SAFETY CONSIDERATIONS

Installing and servicing air conditioning equipment can be hazardous due to system pressure and electrical compo nents. Only treuned and qualified service personnel should install or service air conditioning equipment.

Untrained personnel can perform basic maintenance func tions such as 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 and on tags and labels attached to unit.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available.

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4 5

1-5/8” DIAM KNOCKOUT ELECTRIC HEAT

> OUTDOOR AIRFLOW

RIGHT-SIDE VIEW - MODEL 018 048(TYPICAL)

DUCT FLANGE FOR 14”X28” CONNECTION

A88061

A WARNING

Before performing service or maintenance operations on

7/8”

CONNECTOR^

system, turn off main power switches to unit. Turn off

accessory heater power switch if applicable. Electric shock can cause personal injury.

INSTALLATION

Step 1—Check Equipment and Jobsite

1-3/8”DIAM KNOCKOUT LINE WIRING

CONN

RIGHT - SIDE VIEW • MODEL 060

1-5/8”DIAM KNOCKOUT ELECTRIC HEAT

UNPACK UNIT—Move unit to final location. Lift off car

ton tEiking special care not to damage unit.

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

Bookl 1 I 4 PC 101 Catalog No 565-097 Printed in USA Form 50QQ-8Si 11/87 Pg 1 Replaces: 50QQ-7Si

Tab i5a 15a

Fig. 1 —Dimensions and Connections

Table 1—Physical Data and bimensions

MODEL 50QQ

REFRIGERANT (R-22)

Operating Charge (lb)

Refrigerant Control SHIPPING WEIGHT (lb) 323 1 329 1 346 1 357 | 402 | 445 | 484 DIMENSIONS (in.)

DUCT CONNECTIONS (in.)

FILTER SIZE (in.)t

Disposable

Permanent

*Dimension C includes %-in built-in base support channels tOptional square duct flanges are available as an accessory for 14-in x 14-in duct. ijiRecommended field-supplied filters are one-in. thick.

A B

D E

018 024

7 lbs 4 oz

20x25 20x25 (2)15x20 15x20 15x20 20x20

6 lbs 8 oz 8 lbs 0 oz

22'k 1 2472 1 29% 32%

030

Side-By-Side

Round!

036

7 lbs 4 oz

Piston

15x20

20x20 (2) 20 X 20

20x25

8 lbs 2 oz

INSPECT EQUIPMENT—File claim with shipping com pany if shipment is damaged or incomplete.

COMPLETE SYSTEM REQUIREMENTS before

installing.

Consult local building codes and National Electrical Code (NEC) ANSI/NFPA 70-1987 for special installation requirements.

Provide sufficient space for coil airflow clearance, wiring, and servicing unit. See Fig. 1 and 2. Locate unit where sup ply and return air ducts can be conveniently brought out to unit duct connections.

Unit may be placed with duct side as close to building as top removal, duct connections and power connections per mit. Position unit so water or ice from roof does not drop directly on top of unit or in front of coil. Make provisions for condensate drainage and defrost water disposal. Maintain a 4-ft clearance above unit for vertical air discharge.

Roof installation method for 50QQ depends on building con struction and special requirements of local building codes. Ensure that roof can support unit weight. Protect unit from prevailing winds to ensure adequate defrost.

Step 2—Mount Unit

NOTES:

In areas of snowfall or subfreezing temperatures when elevated frame Is used Dimension A is 48-in., Dimension B is 42-in. In areas where elevated frame is not used Dimension A is 45-in , Dimension

B is 39-in

Allow a 3-ft service clearance at front and rear sides of unit

ON THE GROUND—Mount heat pump on an elevated frame positioned on a level pad. See Fig. 2 for pad dimen

Fig. 2—Pad Dimensions

sions. Ensure pad does not obstruct coil slots in unit basepan. (Slots drain water during heating and defrost cycles. See Fig. 2 for drain slot locations.) Construct pad to provide clearance under basepan coil slots for drainage and ice buildup. In areas where prolonged subfreezing temperatures or snowfall occur, increase clearance to 12 to 18-in. by con structing an angle-iron frame to support unit 12 to 18-in. off base. Design cross angle of frame so as not to obstruct basepan coil slots. See Fig. 3 for recommended frame construc tion. Alternate construction should follow dimensions. Extend a 24-in. gravel apron around pad for condensate and defrost water drainage field.

ON THE ROOF—Mount unit on a level platform or frame. Elevate unit for proper clearance as described under ground insteJlation above. Design roof and plan water runoff so as

to prevent unit and its duct flashing from sitting in water, in accordance with eJl applicable codes.

Step 3—Make Ductwork Connections

CONNECT RETURN AND SUPPLY AIR DUCT WORK—Connect ductwork to unit supply and return air duct connections. Refer to Fig. 1 and Table 1 for unit supply and return air connection sizes and locations.

Flanges are provided on Models 018-048 for round duct con nections, on Model 060 for rectanguleu- duct connections. Accessory duct flange kit is available for squeire or rectan gular connections on 018-048 units. Refer to accessory Installation Instructions on page 5 for connections to ductwork.

Fig. 4 shows a typical duct system with 50QQ installed. Do not operate unit longer than 5 minutes without ductwork or damage to blower motor may result.

042

20x25

048

9 lbs 0 oz

20x25

20x20

(2) 15x 20 (2) 20 X 20

060

9 lbs 0 oz

Side-By-Side

Rectangular

13"/,eXl3’7,e

13"Ae X 277a

25x25 20x25

A88063

I =\ = = = ^ 305 mm (12") TO 610 mm (24") (4) REQ

^ ----- —---------------------------------------------------------------------'(411") (2) REQ ' I ---------------1 I 959mm (37|")(2)REQ

^ I

----------------------

gj I I - |-^ 406 mm (16") (8) REQ

material:

ANGLE IR0N-3L8mm(l^) TO 38mm (1^) COMM'L STD

WELD FRAME TOGETHER PAINT WITH ZINC-RICH PAINT (RUSTPROOF)

-| 959mm(375 )(l) REQ.

r 38 mm (1-5) 3"

Fig. 3—Heat Pump Mounting Frame

When designing and installing ductwork, consider the following:

1. When connecting ductwork to 042, 048 and 060 units, do not drill deeper than one inch in shaded area shown below. Coil may be damaged.

Install field-supplied filters in return air ductwork. Rec ommended sizes for filters are shown in Table 1.

Avoid abrupt duct size increases and reductions. Abrupt change in duct size adversely affects air performance.

Use flexible connectors between ductwork and unit to prevent transmission of vibration. When electric heater is installed, use fireproof canvas (or similar heat resis tant material) connector between ductwork and unit

discharge connection. If flexible duct is used, insert a sheet metal sleeve inside duct. Heat resistant duct con nector (or sheet meted sleeve) must extend 24-in. from electric heat element.

5. Size ductwork for cooling air quantity (cfm). The mini

mum air quantity for proper electric heater operation is listed below. Heater limit switches may trip at air quantities below those recommended.

MODEL

50QQ

018 024 030 036 042 048 060

INDOOR FAN

SPEED SETTING

Low 1400

MIN CFM

675 875 875

1400 1700 1800

6. Insulate and weatherproof all external ductwork. Insu late and cover with a vapor barrier all ductwork pass ing through unconditioned spaces. Follow latest

SMACNA (Sheet Metal and Air Conditioning Contrac

tors National Association) minimum installation stand

ards for residential heating and air conditioning systems.

7. Secure all ducts to building structure. Weatherproof duct openings in wall or roof according to good con

struction practices.

PARAT NO.

99TZ900521

99T2900571 50LQ90002106

50LQ90001106 38RQ900012 50LQ90000106 Outdoor Thermostat (Six 50LQ900001) 50LQ900031 32LT900301

32LT900611 50YM900051

88EM0050MA01 88EM0075MA01 88EM0100MA01 88EM0150MA01 88EM0200MA01 88EM0250MA01

88EM0100EA01 88EM0150EA01

88EM0200EA01 88EM0250EA01

88EM0100FA01

88EM0150FA01

88EM0200FA01 88EM0250FA01

HC95DE023 HC95DD058

HC95DE088 HC95DE208

HN61HB510 HN61KB021

HN61KB075 ♦Available through Service Parts NOTE: Electric heaters are rated at 240 and 480 volts

Thermostat 1 -stage cooling, automatic changeover Subbase 2-stage heating, Carrier, Honeywell

Thermostat 2-stage cooling, manual changeover Subbase 2-stage heating, Carrier, Honeywell

Solid-State Time Guard® Control (Six 50LQ900021) Service Sentry (Six 50LQ900011) Supplemental Heat Relay—Used with 25 kW heater and 2 outdoor thermostats

Reversible Filter Drier and AccuRater Assembly Motormaster® Head Pressure Control Motormaster Head Pressure Control Duct Flange Kit Electric Heater—5 kW, 240-1

Electric Heater—7.5 kW, 240-1 Electric Heater—10 kW, 240-1 Electric Heater—15 kW, 240-1 Electric Heater—20 kW, 240-1 Electric Heater—25 kW, 240-1

Electric Heater—10 kW, 240-3 Electric Heater—15 kW, 240-3 Electric Heater—20 kW, 240-3 Electric Heater—25 kW, 240-3

Electric Heater—10 kW, 480-3 Electric Heater—15 kW, 480-3 Electric Heater—20 kW, 480-3 Electric Heater—25 kW, 480-3

Start Capacitor^ Start Capacitor^ Start Capacitor^ Start Capacitor^

Start Relays Start Relays Start Relays

Table 2—Accessories

DESCRIPTION

MODEL

50QQ

All

All All

060

All All

All 208/230-v

All 460-v

018-048

All All

All 030-060 036-060

060

030-060 030-060 042-060

060

036-060 036-060 036-060

060

018 024, 030 036-048

060 018

024-048

060

Step 4—Provide for Cooling Cycle condensate Disposal-

Condensate may be drained directly onto gravel apron or connected by drain line(s) to a dry well. Follow local codes.

CONNECT DRAIN LINE to rubber condensate drain fit ting on side of unit (see Fig. 5). Use clamp provided. Install factory-supplied condensate trap (taped to indoor fan com partment for shipment) at end of dredn line. If a drain line is not used, connect condensate trap to unit drain fitting as shown in Fig. 4.

FAN MOTOR MOUNTING BOLTS

ORIFICE RING

FAN MOTOR BLOWER

HOUSING

CAPACITOR

♦Separate disconnect per NEC required for electric heater

Fig. 4—Typical Installation

CONDENSATE TRAP

Fig. 5—Condensate Drain and Trap Details

step 5—Make Electrical Connections—Install field wiring

in compliance with loced and national fire, safety and electri cal codes. Be sure voltage to unit is within ± 10% of volt age indicated on nameplate. Contact local power company for correction of improper line voltage.

Operation of unit on improper line voltage constitutes abuse and may cause unit damage that could affect war ranty.

See Table 3 for recommended fuse sizes. INSTALL A BRANCH CIRCUIT DISCONNECT PER

NEC of adequate size to handle unit starting current. Pro vide a separate disconnect for unit and for each accessory electric heater circuit as required. (See electric heater Instal lation, Start-Up and Service Instructions.) Locate disconnect(s) within sight from and readily accessible from the unit, per Section 440-14 of National Electriced Code (NEC).

ROUTE LINE POWER LEADS INTO UNIT-Extend leads from disconnect per NEC through hole provided (Fig. 1) into line wiring splice box. Use copper wire only.

CONNECT GROUND LEAD TO GROUND LUG in splice box for safety. Connect power wiring. See Fig. 7. Connect line power leads to yellow and black pigtails on single-phase units.

SET INDOOR FAN MOTOR SPEED-Refer to page 3 for minimum edlowable eiir quantity for safe electric heater operation. Indoor fan motor is factory wired for low-speed operation on all models. Fan motor is equipped with spadetype speed selector terminals marked 1, 2 and 3 on 3-speed motors (042 and 048), and 1 and 2 on 2-speed motors (018, 024, 030, 036 and 060).

For electric heater operation, set motor at: LOW—sizes 018 through 042, and 060; MED—size 048.

MOTOR TERMINAL FAN SPEED

(3-speed, 042, 048) FAN SPEED

(2-Speed, 018-036, 060)

High

Medium

Low

—

For air delivery performeuice, refer to Table 4. ROUTE CONTROL POWER WIRES (24v) through 78-in.

connector provided in unit. Fig. 1. Extend leads to unit con trol wiring terminal boeu-d in unit control box. Fig. 6. Con nect leads to terminal board as shown in Fig. 8.

The unit transformer supplies 24-v power for complete sys tem including accessory electric heater. A resettable circuit breaker is provided in the 24-v circuit.

RUN

HEATER

CAPACITOR CONTROL

VOLTAGE CIRCUIT BREAKER

CONTROL BOARD

SUPPLE MENTAL HEAT RELAY

SERVICE SENTRY

UNIT GROUNDING LUG

START THERMISTOR

TRANSFORMER

CONTACTOR

HEATER CONTROL RELAY

TIME GUARD

LIM^i7cONTROL S^PLT^AGE GROUNDING

HEATER

connection

Fig. 6—Control Section

ACCESSORY DUCT FLANGE KIT INSTALLATION018-048

1. Refer to Fig. 8 for duct adapter dimensions and hole

locations.

2. Mark hole locations.

MODEL

5000

018 024 030 036 042 048 060

030 036 042

048 060

036 042 048 060

FLA —Full Load Amps HACR—Heating, Air Conditioning, Refrigeration IFM —indoor Fan Motor LRA —Locked Rotor Amps MCA —Minimum Circuit Amps

OFM —Outdoor Fan Motor

RLA —Rated Load Amps

V-PH

208/230-1 253 187 82 0

208/230-3 253 187 79 5

460-3

Max Min LRA

506 414 398

Table 3—Unit Electrical Data (60 Hz)

OPER

VOLTAGE*

COMPRESSOR

r RLA

50 0

53.0

65.0

106.0

1100

178.0 53 0

67 5

90.0

124.0

33.8 45 0

62.0

9.3 3.5 1 4

11 6 35

13.9

17.2 20 7 35

22.4 4.6 2.2

30.2 6.7 81

108

12.0

146 4.6

20.5 6.7

5.0

63 20

7.0 20

10.3

*Permissibie limits of the voltage range at which units will operate

satisfactorily.

tMaximum dual element fuse NOTE: Use copper wire only.

IFM FLA

35 1.4 35 22

35 35 46

1 7

3.4

OFM

FLA

1.4

2.8

1 4

2.2

2.2 22

2.8

1.3

MAX FUSEt

OR HACR CKT

BKR AMPS

25 30 35 40 50 50 60

25 30 35 45

15 15 25

MCA

165

19.4

22.2

27 2

31.6

34.8

47.3

15.0 19 2

21.8

25 0

35.1

8.7

11 2

12.1

17.6

+ 11 hidden pages

Carrier 50QQ User Manual

50QQ

Single-Package Heat Pumps

Installation, Start-Up and Service Instructions

CONTENTS

SAFETY CONSIDERATIONS

A WARNING

INSTALLATION

Step 1—Check Equipment and Jobsite

Step 2—Mount Unit

Fig. 2—Pad Dimensions

Step 3—Make Ductwork Connections

Step 4—Provide for Cooling Cycle condensate Disposal-