Rheem RQNL, RQPL Installation Manual

INSTALLATION INSTRUCTIONS

THESE INSTRUCTIONS ARE INTENDED AS AN AID TO

QUALIFIED, LICENSED SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS THOROUGHLY BEFORE ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION, ADJUSTMENT, SERVICE OR MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

WARNING

ISO 9001:2008

PACKAGE HEAT PUMPS FEATURING INDUSTRY STANDARD R-410A REFRIGERANT

RQNL- 13 SEER SERIES (2-4 TONS) RQPL- 14 SEER SERIES (2-4 TONS)

14 SEER ONLY

SUPERSEDES 92-20522-42-07

92-20522-42-08

TABLE OF CONTENTS

I. Safety Information.................................................................................................3

II. Introduction ...........................................................................................................5

A. R-410A Refrigerant...........................................................................................5

1. Specification of R-410A.................................................................................5

2. Quick Reference for R-410A.........................................................................5

3. Evaporator Coil/TXV .....................................................................................5

4. Tools Required for Installing and Servicing R-410A Models.........................5

III. Checking Product Received..................................................................................8

IV. Equipment Protection............................................................................................8

V. Installation.............................................................................................................8

A. General .............................................................................................................8

1. Pre-Installation Check Points........................................................................8

2. Location.........................................................................................................8

B. Outside Slab Installation..................................................................................10

C.Clearances ......................................................................................................10

D.Rooftop Installation..........................................................................................10

VI. Ductwork.............................................................................................................11

VII. Filters ..................................................................................................................12

VIII. Conversion Procedure ........................................................................................13

IX. Condensate Drain...............................................................................................13

X. Condensate Drain, Outdoor Coil.........................................................................14

XI. Electrical Wiring ..................................................................................................14

A. Power Wiring...................................................................................................14

B. Control Wiring .................................................................................................14

C.Internal Wiring.................................................................................................14

D.Grounding .......................................................................................................14

E. Thermostat......................................................................................................15

XII. Indoor Air Flow Data ...........................................................................................16

XIII. Crankcase Heat ..................................................................................................16

XIV. Pre-Start Check...................................................................................................16

XV. Startup.................................................................................................................16

XVI. Operation ............................................................................................................17

XVII. Auxiliary Heat......................................................................................................17

XVIII. Demand Defrost Control and High/Low Pressure Controls.................................18

XIX. General Data..................................................................................................20-24

XX. Miscellaneous

Electrical Data ................................................................................................25-26

Airflow Performance.......................................................................................27-30

Heater Kit Characteristics...............................................................................31-32

Wiring Diagrams.............................................................................................33-37

Charge Charts................................................................................................38-42

Trouble Shooting .................................................................................................43

I. SAFETY INFORMATION

WARNING

IMPORTANT: ALL MANUFACTURER PRODUCTS MEET CURRENT FEDERAL OSHA GUIDELINES FOR SAFETY. CALIFORNIA PROPOSITION 65 WARNINGS ARE REQUIRED FOR CERTAIN PRODUCTS, WHICH ARE NOT COVERED BY THE OSHA STANDARDS.

CALIFORNIA'S PROPOSITION 65 REQUIRES WARNINGS FOR PRODUCTS SOLD IN CALIFORNIA THAT CONTAIN, OR PRODUCE, ANY OF OVER 600 LISTED CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER OR BIRTH DEFECTS SUCH AS FIBERGLASS INSULATION, LEAD IN BRASS, AND COMBUSTION PRODUCTS FROM NATURAL GAS.

ALL “NEW EQUIPMENT” SHIPPED FOR SALE IN CALIFORNIA WILL HAVE LABELS STATING THAT THE PRODUCT CONTAINS AND/OR PRODUCES PROPOSITION 65 CHEMICALS. ALTHOUGH WE HAVE NOT CHANGED OUR PROCESSES, HAVING THE SAME LABEL ON ALL OUR PRODUCTS FACILITATES MANUFACTURING AND SHIPPING. WE CANNOT ALWAYS KNOW “WHEN, OR IF” PRODUCTS WILL BE SOLD IN THE CALIFORNIA MARKET.

YOU MAY RECEIVE INQUIRIES FROM CUSTOMERS ABOUT CHEMICALS FOUND IN, OR PRODUCED BY, SOME OF OUR HEATING AND AIR-CONDITIONING EQUIPMENT, OR FOUND IN NATURAL GAS USED WITH SOME OF OUR PRODUCTS. LISTED BELOW ARE THOSE CHEMICALS AND SUBSTANCES COMMONLY ASSOCIATED WITH SIMILAR EQUIPMENT IN OUR INDUSTRY AND OTHER MANUFACTURERS.

• GLASS WOOL (FIBERGLASS) INSULATION

• CARBON MONOXIDE (CO)

• FORMALDEHYDE

• BENZENE MORE DETAILS ARE AVAILABLE AT THE WEBSITES FOR OSHA

(OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION), AT WWW.OSHA.GOV ENVIRONMENTAL HEALTH HAZARD ASSESSMENT), AT WWW.OEHHA.ORG. CONSUMER EDUCATION IS IMPORTANT SINCE THE CHEMICALS AND SUBSTANCES ON THE LIST ARE FOUND IN OUR DAILY LIVES. MOST CONSUMERS ARE AWARE THAT PRODUCTS PRESENT SAFETY AND HEALTH RISKS, WHEN IMPROPERLY USED, HANDLED AND MAINTAINED.

AND THE STATE OF CALIFORNIA'S OEHHA (OFFICE OF

WARNING

THE MANUFACTURER’S WARRANTY DOES NOT COVER ANY DAMAGE OR DEFECT TO THE HEAT PUMP CAUSED BY THE ATTACHMENT OR USE OF ANY COMPONENTS, ACCESSORIES OR DEVICES (OTHER THAN THOSE AUTHORIZED BY THE MANUFACTURER) INTO, ONTO OR IN CONJUNCTION WITH THE HEAT PUMP. YOU SHOULD BE AWARE THAT THE USE OF UNAUTHORIZED COMPONENTS, ACCESSORIES OR DEVICES MAY ADVERSELY AFFECT THE OPERATION OF THE HEAT PUMP AND MAY ALSO ENDANGER LIFE AND PROPERTY. THE MANUFACTURER DISCLAIMS ANY RESPONSIBILITY FOR SUCH LOSS OR INJURY RESULTING FROM THE USE OF SUCH UNAUTHORIZED COMPONENTS, ACCESSORIES OR DEVICES.

WARNING

DISCONNECT ALL POWER TO THE UNIT BEFORE STARTING MAINTENANCE. FAILURE TO DO SO CAN RESULT IN SEVERE ELECTRICAL SHOCK OR DEATH.

WARNING

DO NOT, UNDER ANY CIRCUMSTANCES, CONNECT RETURN DUCTWORK TO ANY OTHER HEAT PRODUCING DEVICE SUCH AS A FIREPLACE INSERT, STOVE, ETC. UNAUTHORIZED USE OF SUCH DEVICES MAY RESULT IN FIRE, CA RB ON MONOXIDE P OISONING, EX PL OSION, PRO PE RT Y DAMAGE,

WARNING

THE UNIT MUST BE PERMANENTLY GROUNDED. A GROUNDING LUG IS PROVIDED IN THE ELECTRIC HEAT KIT FOR A GROUND WIRE. (SEE FIGURE

10.) FAILURE TO GROUND THIS UNIT CAN RESULT IN FIRE OR ELECTRICAL SHOCK CAUSING PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR

WARNING

ONLY ELECTRIC HEATER KITS SUPPLIED BY THIS MANUFACTURER AS DESCRIBED IN THIS PUBLICATION HAVE BEEN DESIGNED, TESTED, AND EVALUATED BY A NATIONALLY RECOGNIZED SAFETY TESTING AGENCY FOR USE WITH THIS UNIT. USE OF ANY OTHER MANUFACTURED ELECTRIC HEATERS INSTALLED WITHIN THIS UNIT MAY CAUSE HAZARDOUS CONDITIONS RES ULTING IN PROPER TY D AMAGE, FIRE, BODILY INJURY OR DEATH.

Recognize this symbol as an indica-

tion of Important Safety Information!

WARNING

• GLASS WOOL (FIBERGLASS) INSULATION

• CARBON MONOXIDE (CO)

• FORMALDEHYDE

• BENZENE

MORE DETAILS ARE AVAILABLE AT THE WEBSITES FOR OSHA (OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION), AT WWW.OSHA.GOV OF CALIFORNIA'S OEHHA (OFFICE OF ENVIRONMENTAL HEALTH HAZARD ASSESSMENT), AT WWW.OEHHA.ORG. CONSUMER EDUCATION IS IMPORTANT SINCE THE CHEMICALS AND SUBSTANCES ON THE LIST ARE FOUND IN OUR DAILY LIVES. MOST CONSUMERS ARE AWARE THAT PRODUCTS PRESENT SAFETY AND HEALTH RISKS, WHEN IMPROPERLY USED, HANDLED AND MAINTAINED.

AND THE STATE

II. INTRODUCTION

This booklet contains the installation and operating instructions for your package heat pump. There are a few precautions that should be taken to derive maximum satisfaction from it. Improper installation can result in unsatisfactory operation or dangerous conditions.

Read this booklet and any instructions packaged with separate equipment required to make up the system prior to installation. Give this booklet to the owner and explain its provisions. The owner should retain this booklet for future reference.

NOTE: A load calculation must be performed to properly determine the required heating and cooling for the structure. Also, the duct must be properly designed and installed for proper airflow. Existing ductwork must be inspected for proper size and sealed system. Proper airflow is necessary for both user comfort and equipment performance.

IMPORTANT: Proper application, installation and maintenance of this equipment is a must if consumers are to receive the full benefit for which they have paid.

A. R-410A REFRIGERANT

All units are factory charged with R-410A refrigerant.

1. Specification of R-410A:

Application: R-410A is not a drop-in replacement for R-22; equipment designs must accommodate its higher pressures. It cannot be retrofitted into R-22 units.

Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater than R-

22. Recovery and recycle equipment, pumps, hoses and the like need to have design

pressure ratings appropriate for R-410A. Manifold sets need to range up to 800 psig high-side and 250 psig low-side with a 550 psig low-side retard. Hoses need to have a service pressure rating of 800 psig. Recovery cylinders need to have a 400 psig service pressure rating. DOT 4BA400 or DOT BW400.

Combustibility: At pressures above 1 atmosphere, mixture of R-410A and air can become combustible. R-410A and air should never be mixed in tanks or supply

lines, or be allowed to accumulate in storage tanks. Leak checking should never be done with a mixture of R-410A and air. Leak checking can be performed safely

with nitrogen or a mixture of R-410A and nitrogen.

2. Quick Reference Guide For R-410A

• R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than R-

22. Ensure that servicing equipment is designed to operate with R-410A.

• R-410A refrigerant cylinders are pink.

• R-410A, as with other HFC’s is only compatible with POE oils.

• Vacuum pumps will not remove moisture from POE oil.

• R-410A systems are to be charged with liquid refrigerants. Prior to March 1999, R410A refrigerant cylinders had a dip tube. These cylinders should be kept upright for equipment charging. Post March 1999 cylinders do not have a dip tube and should be inverted to ensure liquid charging of the equipment.

• Do not install a suction line filter drier in the liquid line.

• A liquid line filter drier is standard on every unit.

• Desiccant (drying agent) must be compatible for POE oils and R-410A

3. Evaporator Coil / TXV

The thermostatic expansion valve is specifically designed to operate with R-410A. DO NOT use an R-22 TXV. The existing evaporator must be replaced with the factory specified TXV evaporator specifically designed for R-410A.

4. Tools Required For Installing & Servicing R-410A Models

Manifold Sets:

-Up to 800 PSIG High side

-Up to 250 PSIG Low Side

-550 PSIG Low Side Retard

Manifold Hoses:

-Service Pressure Rating of 800 PSIG

Recovery Cylinders:

-400 PSIG Pressure Rating

-Dept. of Transportation 4BA400 or BW400

CAUTION

R-410A systems operate at higher pressures than R-22 systems. Do not use R-22 service equipment or components on R-410A equipment.

FIGURE 1

THERMOSTAT WIRE ENTRANCE

29% ± 2%

30% ± 2%

TOP COVER

21% ± 2%

20% ± 2%

ELECTRICAL POWER ENTRANCE

BLOWER/ EVAPORATOR ACCESS PANEL

FILTER ACCESS PANEL (FOR UNIT MOUNTED FILTER ACCESSORY)

SIDE SUPPLY DUCT OPENING

SIDE RETURN DUCT OPENING

CORNER WEIGHTS %

OF TOTAL UNIT

WEIGHT

OUTDOOR FAN GRILLE AND COMPRESSOR ACCESS

LIQUID PRESSURE SERVICE PORT

CONTROL ACCESS PANEL

SUCTION PRESSURE SERVICE PORT

OUTDOOR COIL PROTECTIVE GRILLE

THREADED PVC CONDENSATE DRAIN CONNECTION (3/4 N.P.T.)

FIGURE 1

OUTDOOR FAN GRILLE AND COMPRESSOR ACCESS

4719⁄32

ⴖ

451⁄16

INSIDE

ⴖ

BOTTOM

13⁄16 TYP.

ⴖ

11⁄2

TYP.

RETURN DUCT OPENING

ⴖ

497⁄16

INSIDE

BOTTOM

5013⁄16

ⴖ

141⁄4

TYP.

199⁄16

ⴖ

153⁄8

SUPPLY DUCT

OPENING

ⴖ

11⁄8

ⴖ

255⁄16

ⴖ

103⁄16

51⁄16ⴖ

Model # Height “A”

B024, B025 B030, B036

B042, B048

41"

THREADED PVC

CONDENSATED DRAIN

CONNECTION (3/4 N.P.T.)

THERMOSTAT WIRE ENTRANCE

ELECTRICAL POWER ENTRANCE

ⴖ

43⁄4

⁄16"

FRONT VIEW

471⁄2

SIDE VIEW

2211⁄16

ⴖ

BLOWER/ EVAPORATOR ACCESS PANEL

PRESSURE

75⁄16

ⴖ

CONTROL

ACCESS

PANEL

LIQUID

SERVICE

PORT

ⴖ

SUCTION

PRESSURE

SERVICE

PORT

ⴖ

313⁄16

FILTER ACCESS

45⁄16

ⴖ

33⁄16

ⴖ

SIDE VIEW

PANEL (FOR

UNIT MOUNTED

FILTER

ACCESSORY)

OUTDOOR

COIL

PROTECTIVE

GRILLE

ⴖ

527⁄16

IMPORTANT:

INSTALLATION MUST NOT INTERFERE WITH DRAINAGE OPENINGS IN BOTTOM OF UNIT UNDER OUTDOOR COIL.

REAR VIEW

SIDE SUPPLY

DUCT

OPENING

ⴖ

47⁄8

ⴖ

133⁄4

TYP.

21⁄2

ⴖ

47⁄16

SHOWN WITH DUCT COVERS REMOVED.

81⁄2 TYP.

ⴖ

191⁄8

143⁄16

TYP.

ⴖ

57⁄16ⴖ

SIDE RETURN

DUCT

OPENING

WARNING

III. CHECKING PRODUCT RECEIVED

Upon receiving the unit, inspect it for any damage from shipment. Claims for damage, either shipping or concealed, should be filed immediately with the shipping company. Check the unit model number, heating size, electrical characteristics, and accessories to determine if they are correct.

IV. EQUIPMENT PROTECTION FROM THE

ENVIRONMENT

The metal parts of this unit may be subject to rust or deterioration in adverse environmental conditions. This oxidation could shorten the equipment’s useful life. Salt spray, fog or mist in seacoast areas, sulphur or chlorine from lawn watering systems, and various chemical contaminants from industries such as paper mills and petroleum refineries are especially corrosive.

If the unit is to be installed in an area where contaminants are likely to be a problem, special attention should be given to the equipment location and exposure.

1. Avoid having lawn sprinkler heads spray direction on the unit cabinet.

2. In coastal areas, locate the unit on the side of the building away from the waterfront.

3. Shielding provided by a fence or shrubs may give some protection.

4. Elevating the unit off its slab or base enough to allow air circulation will help avoid holding water against the basepan.

Regular maintenance will reduce the buildup of contaminents and help to protect the unit’s finish.

WARNING

DISCONNECT ALL POWER TO THE UNIT BEFORE STARTING MAINTENANCE. FAILURE TO DO SO CAN RESULT IN SEVERE ELECTRICAL SHOCK OR DEATH.

1. Frequent washing of the cabinet, fan blade and coil with fresh water will remove most of the salt or other contaminants that build up on the unit.

2. Regular cleaning and waxing of the cabinet with an automobile polish will provide some protection.

3. A liquid cleaner may be used several times a year to remove matter that will not wash off with water.

Several different types of protective coatings are offered in some areas. These coatings may provide some benefit, but the effectiveness of such coating materials cannot be verified by the equipment manufacturer.

The best protection is frequent cleaning, maintenance and minimal exposure to contaminants.

V. INSTALLATION

A. GENERAL

1. PRE-INSTALLATION CHECK-POINTS

Before attempting any installation, the following points should be carefully considered:

a. Structural strength of supporting members.

(rooftop installation) b. Clearances and provision for servicing. c. Power supply and wiring. d. Air duct connections. e. Drain facilities and connections. f. Location for minimum noise.

2. LOCATION These units are designed for outdoor installations. They can be mounted on a

slab or rooftop. They are not to be installed within any part of a structure such as an attic, crawl space, closet, or any other place where condenser air flow is restricted or other than outdoor ambient conditions prevail. Since the application

FIGURE 2

PACKAGE HEAT PUMP

OUTSIDE SLAB INSTALLATION, BASEMENT OR CRAWL SPACE DISTRIBUTION SYSTEM

60ⴖ OVERHEAD

CLEARANCE

12ⴖ CLEARANCE WITHOUT ECONOMIZER 24ⴖ CLEARANCE WITH ECONOMIZER

FIGURE 3

PACKAGE HEAT PUMP

OUTSIDE SLAB INSTALLATION, CLOSET DISTRIBUTION

FILTER GRILL

BRANCH CIRCUIT DISCONNECT

SERVICE ACCESS PANELS DO NOT BLOCK ACCESS

SUPPLY DUCT AT CLOSET CEILING

SLAB FLOOR

36ⴖ

24ⴖ TO SERVICE BLOWER & EVAPORATOR

0ⴖ MIN.

CLEARANCE

0 ⴖ CLEARANCE AROUND

SUPPLY DUCT TO

COMBUSTIBLE STRUCTURE

FIGURE 4

PACKAGE HEAT PUMP

RIGGING FOR LIFTING

I268

IMPORTANT: UNIT MUST BE LEVEL TO PREVENT WATER MIGRATION

RIGGING NOT PROVIDED

POWER SUPPLY CONDUIT

THERMOSTAT WIRE CONDUIT

I267

DETAIL A

SEE DETAIL A

ST-A1100-01

of the units is of the outdoor type, it is important to consult your local code authorities at the time the first installation is made.

B. OUTSIDE SLAB INSTALLATION (Typical outdoor slab installations are shown

in Figures 2 and 3.)

1. Select a location where external water drainage cannot collect around the unit.

2. Provide a level concrete slab extending a minimum 3" beyond all four sides of the unit. The slab should be sufficient above grade to prevent ground water from entering the unit. IMPORTANT: To prevent transmission of noise or vibration,

slab should not be connected to building structure.

3. The location of the unit should be such as to provide proper access for inspection and servicing.

4. Locate unit where operating sounds will not disturb owner or neighbors.

5. Locate unit so roof runoff water does not pour directly on the unit. Provide gutter or other shielding at roof level. Do not locate unit in an area where excessive snow drifting may occur or accumulate.

6. It is essential that the unit be elevated above the base pad to allow for condensate drainage and possible refreezing of condensation. Provide a base pad which is slightly pitched away from the structure. Route condensate off base pad to an area which will not become slippery and result in personal injury. IMPORTANT:

Do not interfere with openings in bottom of unit.

7. Where snowfall is anticipated, the height of the unit above the ground level must be considered. Mount unit high enough to be above average area snowfall and to allow for proper condensate drainage. IMPORTANT: Do not interfere with open-

ings in bottom of unit.

C. CLEARANCES

The following minimum clearances must be observed for proper unit performance and serviceability.

1. Provide 36" minimum clearance at the front and right side of the unit for service access. Provide 12" minimum clearance on the left side of the unit for air inlet.

2. Provide 60" minimum clearance between top of unit and maximum 3 foot overhang.

3. Unit is design certified for application on combustible flooring with 0" minimum clearance.

4. See Figure 2 for illustration of minimum installation-service clearances.

D. ROOFTOP INSTALLATION

1. Before locating the unit on the roof, make sure that the strength of the roof and beams is adequate at that point to support the weight involved. (See specification sheet for weight of unit.) This is very important and user’s responsibility.

2. For rigging and roofcurb details, see Figures 4 and 5. Use accessory lift brackets and field-furnished spreaders.

3. For roofcurb assembly, see Roofcurb Installation Instructions.

4. If the roofcurb is not used, provisions for disposing of condensate water runoff during defrosting must be provided.

5. The unit should be placed on a solid and level roofcurb or platform of adequate strength. IMPORTANT: Do not interfere with opening in bottom of unit. (See Figures 6 and 7.)

6. The location of the unit on the roof should be such as to provide proper access for inspection and servicing.

IMPORTANT: If unit will not be put into service immediately, cover supply and return openings to prevent excessive condensation.

FIGURE 5

PACKAGE HEAT PUMP

ROOFCURB INSTALLATION

I270 I271

VI. DUCTWORK

Ductwork should be fabricated by the installing contractor in accordance with local codes, state codes and NFPA90A. Industry manuals may be used as a guide when sizing and designing the duct system - contact Air Conditioning Contractors of America, 1513 16th St. N.W., Washington, D.C. 20036.

WARNING

Place the unit as close to the space to be air conditioned as possible allowing clearance dimensions as indicated. Run ducts as directly as possible to supply and return outlets. Use of non-flammable waterproof flexible connectors on both supply and return connections at the unit to reduce noise transmission is recommended.

It is preferable to install the unit on the roof of the structure if the registers or diffusers are located on the wall or in the ceiling. Consider a slab installation when the registers are low on a wall or in the floor.

On ductwork exposed to outside air conditions of temperature and humidity, use a minimum of 2" of insulation and a vapor barrier. Distribution system in attic, furred space or crawl space should be insulated with at least 2" of insulation with vapor barrier. One-half to 1" thickness of insulation is usually sufficient for ductwork inside the air conditioned space.

Provide balancing dampers for each branch duct in the supply system. Properly support the ductwork from the structure.

When installing ductwork use noncombustible flexible connectors between ductwork and unit to reduce noise and vibration transmission into the ductwork.

FIGURE 6

PACKAGE HEAT PUMP

FLAT ROOFTOP INSTALLATION, ATTIC OR DROP CEILING DISTRIBUTION SYSTEM. MOUNTED ON ROOFCURB. CURB MUST BE LEVEL

SERVICE ACCESS

PANELS. DO NOT

BLOCK ACCESS

CONDENSATE INTO ROOFDRAIN IF REQ’D BY LOCAL CODES.

THERMOSTAT WIRE CONDUIT

BRANCH CIRCUIT

DISCONNECT

POWER SUPPLY

CONDUIT

I272

VII. FILTERS

Filters are not provided with this unit. They may be supplied and installed in the return air duct by the installer. A field installed filter grille is recommended for easy and convenient access to the filters for periodic inspection and cleaning. Filters must have adequate face area for the rated air quantity of the unit. See Airflow Performance Table - or Electrical and Physical Data Table - for recommended filter size.

However, if an internal filter is required, an optional internal filter kit is available which will work for downflow or horizontal applications. For installation, see Filter Kit Installation Instruction.

NOTE: Do not operate the system without filters.

FIGURE 7

PACKAGE HEAT PUMP

PITCHED ROOFTOP INSTALLATION, ATTIC OR DROP CEILING DISTRIBUTING SYSTEM. MUST BE MOUNTED LEVEL.

CONDENSATE DRAIN INTO ROOFDRAIN IF REQ’D BY LOCAL CODES.

SERVICE ACCESS PANELS. DO NOT BLOCK ACCESS

SUPPLY PLENUM

BRANCH CIRCUIT DISCONNECT

POWER SUPPLY CONDUIT

THERMOSTAT WIRE CONDUIT

I273

FIGURE 8

COVER GASKET DETAIL

FOR UNITS SHIPPED FOR SIDE DISCHARGE APPLICATION BEING CONVERTED TO DOWNFLOW

SUPPLY/RETURN AIR COVER

TAPE AROUND FLANGE

I654

VIII.CONVERSION PROCEDURE

1. DOWNFLOW TO HORIZONTAL a. Remove screws and covers from outside of supply and return sections.

b. Install gasket (supplied with parts bag) around perimeter of covers as illustrated in

“Cover Gasket Detail,” Figure 8.

c. Install covers in bottom of unit with insulated side up.

NOTE: Slip back flange of cover under tab on bottom supply duct opening.

d. Secure covers to base of unit with screw engaging prepunched holes in unit base.

2. HORIZONTAL TO DOWNFLOW a. Remove screws and covers from the downflow supply and return sections. Both

covers are accessible from the inside of the unit. NOTE: Supply cover must be rotated 90º before it can be removed.

b. Install gasket (supplied with parts bag) around perimeter of cover on the insulated

side. See Figure 9.

c. Install covers on the outside of the unit over the horizontal supply and return

opening using existing screws.

IX. CONDENSATE DRAIN

The indoor coil condensate drain ends with a threaded (3/4" NPT) PVC stub. A trap is built in for proper condensate drainage and to prevent debris from being drawn into the unit. Do not connect drain to closed sewer line. It is recommended that a PVC cement not be used so that the drain line can be easily cleaned in the future.

NOTE: Do not install an external trap.

FIGURE 9

COVER GASKET DETAIL

FOR UNITS SHIPPED FOR DOWNFLOW APPLICATION BEING CONVERTED TO SIDE DISCHARGE

SUPPLY/RETURN AIR COVER

TAPE AROUND FLANGE

X. CONDENSATE DRAIN, OUTDOOR COIL

The outdoor coil during heating operation will sweat or run water off. The outdoor coil will also run water off during the defrost cycle. See Section V, Installation, for mounting precautions.

XI. ELECTRICAL WIRING

Field wiring must comply with the National Electrical Code* state and local ordinances that may apply.

*C.E.C. in Canada

A. POWER WIRING

1. It is important that proper electrical power is available at the unit. Voltage should not vary more than 10% from that stamped on the unit rating plate. On three phase units, phases must be balanced within 3%.

2. Install a branch circuit disconnect within sight of the unit and of adequate size to handle the starting current.

3. For branch circuit wiring (main power supply to unit disconnect), the minimum wire size can be determined from the circuit ampacity found on the unit nameplate or from Table F and the National Electrical Code or Canadian Electrical Code.

4. This unit incorporates single point electrical connection for unit and electric heat accessory.

5. Power wiring must be run in grounded rain-tight conduit. Connect the power field wiring as follows: a. NO ELECTRIC HEAT - Connect the field wires directly to the contactor in the

unit control box. Connect ground wire to ground lug.

b. WITH ELECTRIC HEAT - Connect the field wires to the terminal block on the

electric heater kit. Connect the ground wire to the ground lug on the heater kit. NOTE: For installation of the heater kit, follow the instructions provided with the

heater kit.

6. The pigtail wires in the electric heat box are factory wired to the contactor in the control box and are protected by internal fuses in the hinged fuse box mounted under the control box. See label on fuse box cover for fuse sizing.

7. DO NOT connect aluminum field wires to electric heat kit power input terminals.

B. CONTROL WIRING (Class II)

1. Do not run low voltage wiring in conduit with power wiring.

2. Control wiring is routed through the 7/8" hole approximately 11" from the unit top in the corner post adjacent to the control box. Use a minimum #18 AWG thermostat wire. For wire lengths exceeding 50', use #16 AWG thermostat wire. The low voltage wires are connected to the unit pigtails which are supplied with the unit in the low voltage connection box located below the unit control box. See Figure 10.

3. It is necessary that only heat pump thermostats be used. Please contact your distributor for part number information.

4. Figure 11 shows representative low voltage connection diagrams. Read your thermostat installation instructions for any special requirements for your specific thermostat. These connection diagrams are wired to minimize the amount of auxiliary electric heaters to be energized during defrost.

NOTE: Units installed in Canada require that an outdoor thermostat (30,000 min. cycles of endurance) be installed and be wired with C.E.C. Class I wiring.

C. INTERNAL WIRING

1. A diagram of the internal wiring of this unit is located on the electrical control box cover. If any of the original wire as supplied with the appliance must be replaced, the wire gauge and insulation must be the same as original wiring.

D. GROUNDING

WARNING

THE UNIT MUST BE PERMANENTLY GROUNDED. A GROUNDING LUG IS PROVIDED IN THE ELECTRIC HEAT KIT FOR A GROUND WIRE. (SEE FIGURE

10.) FAILURE TO GROUND THIS UNIT CAN RESULT IN FIRE OR ELECTRICAL SHOCK CAUSING PROPERTY DAMAGE, SEVERE PERSONAL INJURY OR DEATH.

+ 30 hidden pages