Rheem RQNL, RQPL Installation Manual

INSTALLATION INSTRUCTIONS

PACKAGE HEAT PUMPS FEATURING

INDUSTRY STANDARD R-410A REFRIGERANT

RQNL13 SEER SERIES (2-4 TONS)

RQPL14 SEER SERIES (2-4 TONS)

14 SEER ONLY

!

! WARNING

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	ISO 9001:2008
SHOCK, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

92-20522-42-08

SUPERSEDES 92-20522-42-07

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

2

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-CONDITION- ING 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 AND THE STATE 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.

! 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, CARBON MONOXIDE POISONING, EXPLOSION, PROPERTY DAMAGE,

3

! 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 RESULTING IN PROPERTY DAMAGE, FIRE, BODILY INJURY OR DEATH.

4

Recognize this symbol as an indication of Important 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 AND THE STATE 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.

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, R- 410A 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.

5

FIGURE 1
		30% ± 2%
		TOP COVER
THERMOSTAT
WIRE
ENTRANCE
29% ± 2%		21% ± 2%
	20% ± 2%
ELECTRICAL		SIDE RETURN
		DUCT OPENING
POWER
ENTRANCE	BLOWER/
	EVAPORATOR	SIDE SUPPLY	CORNER WEIGHTS %
	ACCESS PANEL		OF TOTAL UNIT
		DUCT OPENING
			WEIGHT
			ACCESS
	FILTER ACCESS
	PANEL (FOR
	UNIT MOUNTED
	FILTER ACCESSORY)
			CONTROL
			ACCESS PANEL
			LIQUID PRESSURE
			SERVICE PORT
			SUCTION PRESSURE
			SERVICE PORT
	OUTDOOR
	PROTECTIVE
		THREADED PVC CONDENSATE
		DRAIN CONNECTION (3/4 N.P.T.)
6

FIGURE 1
						451⁄16	13⁄16
						INSIDE
							TYP.
	4719⁄32
								11⁄2
			BOTTOM					TYP.
OUTDOOR			RETURN
FAN GRILLE			DUCT
AND			OPENING
COMPRESSOR
ACCESS
								497⁄16
								INSIDE
								BOTTOM
		5013⁄16	14	1	⁄4			SUPPLY DUCT
								OPENING
			TYP.
						199⁄16	153⁄8
			313⁄16			45⁄16	33⁄16
	SIDE VIEW		FILTER ACCESS				SIDE VIEW
			PANEL (FOR
			UNIT MOUNTED
			FILTER
11⁄8	THERMOSTAT		ACCESSORY)
	WIRE
	ENTRANCE
255⁄16
	ELECTRICAL POWER
	ENTRANCE
103⁄16			OUTDOOR
51⁄16			COIL
			PROTECTIVE
			GRILLE
	43⁄4	BLOWER/					527⁄16
		EVAPORATOR
		ACCESS
Model #	Height “A”	PANEL	IMPORTANT:
B024, B025
	355⁄16"		INSTALLATION MUST NOT INTERFERE WITH DRAINAGE OPENINGS
B030, B036	41"		IN BOTTOM OF UNIT UNDER OUTDOOR COIL.
B042, B048
	FRONT VIEW					REAR VIEW
		CONTROL
		ACCESS
		PANEL	SIDE SUPPLY
			DUCT
			OPENING
		LIQUID					47⁄8
		PRESSURE
		SERVICE
		PORT	133⁄4
			TYP.
		75⁄16
			21⁄2					57⁄16
	2211⁄16	SUCTION
						81⁄2	143⁄16
	471⁄2	PRESSURE				TYP.	TYP.
		SERVICE	47⁄16			15	191⁄8	SIDE RETURN
	THREADED PVC	PORT
								DUCT
	CONDENSATED DRAIN
			SHOWN WITH DUCT COVERS REMOVED.					OPENING
CONNECTION (3/4 N.P.T.)
								7

! 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.

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

8

FIGURE 2	FIGURE 3
PACKAGE HEAT PUMP	PACKAGE HEAT PUMP
OUTSIDE SLAB INSTALLATION, BASEMENT OR	OUTSIDE SLAB INSTALLATION, CLOSET DISTRIBUTION
CRAWL SPACE DISTRIBUTION SYSTEM

SUPPLY DUCT AT

CLOSET CEILING

					FILTER
					GRILL
60 OVERHEAD
CLEARANCE				BRANCH
				CIRCUIT
				DISCONNECT
				SERVICE
				ACCESS PANELS
12 CLEARANCE
				DO NOT BLOCK
WITHOUT
				ACCESS
ECONOMIZER
24 CLEARANCE							SLAB
WITH
							FLOOR
ECONOMIZER
			0 MIN.
36							POWER
			CLEARANCE				SUPPLY
							CONDUIT
			0 CLEARANCE AROUND	IMPORTANT: UNIT MUST BE LEVEL
			SUPPLY DUCT TO			THERMOSTAT
24 TO SERVICE			COMBUSTIBLE STRUCTURE	TO PREVENT WATER MIGRATION		WIRE CONDUIT
BLOWER & EVAPORATOR

I268	I267
FIGURE 4
PACKAGE HEAT PUMP
RIGGING FOR LIFTING
	RIGGING
	NOT
	PROVIDED
	SEE DETAIL A
DETAIL A	ST-A1100-01

9

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 openings 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.

10

FIGURE 5

PACKAGE HEAT

ROOFCURB

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

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,

CARBON MONOXIDE POISONING, EXPLOSION, PROPERTY DAMAGE,

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.

11

FIGURE 6

PACKAGE HEAT PUMP

FLAT ROOFTOP INSTALLATION, ATTIC OR DROP CEILING DISTRIBUTION SYSTEM. MOUNTED ON

ROOFCURB. CURB MUST BE LEVEL

CONDENSATE INTO

ROOFDRAIN IF REQ’D

BY LOCAL CODES.

SERVICE ACCESS

PANELS. DO NOT

BLOCK ACCESS

THERMO-

STAT 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

THER-

MOSTAT

WIRE

CONDUIT

BRANCH

CIRCUIT

DISCONNECT

POWER SUPPLY

CONDUIT

I273

12

FIGURE 8

COVER GASKET DETAIL

FOR UNITS SHIPPED FOR SIDE DISCHARGE

APPLICATION BEING CONVERTED TO DOWNFLOW

SUPPLY/RETURN

AIR COVER

TAPE	I654
AROUND FLANGE

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

13

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.

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