Bard WA4823, WA6023, WA6022, WA602N, WA4822 User Manual

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INSTALLATION INSTRUCTIONS

WALL MOUNTED

PACKAGE AIR CONDITIONERS

MODELS

WA4822

WA4823

WA6022

WA6023

WA602N

Bard Manufacturing Company

Manual :

2100-348D

Bryan, Ohio 43506

Supersedes: 2100-348C

Since 1914...Moving ahead just as planned.

File:

Volume III Tab 16

Date:

05-20-01

 

© Copyright 2001

CONTENTS

Getting Other Information and Publications ..........

1

Wall Mount General Information .............................

2

Air Conditioning Wall Mount Model Nomenclature ..

2

Shipping Damage ....................................................

6

General ................................................................

6

Duct Work ................................................................

6

Condensate Drain ....................................................

6

Filters ................................................................

6

Installation Instructions ...........................................

7

Wall Mounting Information .......................................

7

Mounting the Unit ....................................................

7

Wiring – Main Power .............................................

13

Wiring – Low Voltage Wiring .................................

13

Figures

 

 

Figure 1

Unit Dimensions ......................................

3

 

WA602N, WA6023, WA4823

 

Figure 2

Unit Dimensions ......................................

4

 

WA6022, WA4822

 

Figure 3

Mounting Instructions ..............................

8

 

WA602N, WA6023, WA4823

 

Figure 4

Mounting Instructions ..............................

9

 

WA6022, WA4822

 

Figure 5 Electric Heat Clearance ........................

10

Figure 6

Wall Mounting Instructions .....................

11

Figure 7

Wall Mounting Instructions .....................

11

Figure 8 Common Wall Mounting Installations ....

12

Figure 9 Unit 24V Terminal Board .......................

14

Figure 10 Fan Blade Setting .................................

17

Start Up ...................................................................

15

Important Installer Note .........................................

15

Crankcase Heaters ................................................

15

High Pressure Switch ............................................

15

Three Phase Scroll Compressor Start Up .............

15

Service Hints .........................................................

15

Sequence of Operation ..........................................

15

Compressor Control Module ..................................

15

Adjustments ...........................................................

16

Phase Monitor .......................................................

16

Pressure Service Ports ..........................................

16

Troubleshooting .....................................................

17

Fan Blade Setting Dimensions ..............................

17

Removal of Fan Shroud .........................................

17

Refrigerant Charge ................................................

17

Pressure Table .......................................................

18

Optional Accessories .............................................

19

Tables

 

 

Table 1

Electric Heat Table ..................................

2

Table 2

Electrical Specifications ..........................

5

Table 3

Thermostat Wire Size ...........................

13

Table 4

Wall Thermostat and Subbase

 

 

Combinations ........................................

13

Table 5

Fan Blade Dimensions ..........................

17

Table 6

Indoor Blower Performance ..................

17

Table 7

Refrigerant Charge ...............................

17

Table 8

Rated CFM and Rated ESP ..................

17

Table 9

Maximum ESP of Operation

 

 

Electric Heat Only .................................

18

Table 10

Pressure Table ......................................

18

Table 11

Optional Accessories ............................

19

Getting Other Information and Publications

These publications can help you install the air conditioner or heat pump. You can usually find these at your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard.

National Electrical Code ........................

ANSI/NFPA 70

Standard for the Installation ...................

ANSI/NFPA

90A

 

of Air Conditioning and

 

Ventilating Systems

 

Standard for Warm Air ..........................

ANSI/NFPA

90B

 

Heating and Air

 

Conditioning Systems

 

Load Calculation for ..............................

ACCA Manual J

Residential Winter and

 

Summer Air Conditioning

 

Duct Design for Residential ...................

ACCA Manual

D Winter and Summer Air Conditioning

 

and Equipment Selection

 

For more information, contact these publishers:

ACCA Air Conditioning Contractors of America

1712 New Hampshire Ave. N.W.

Washington, DC 20009

Telephone: (202) 483-9370

Fax: (202) 234-4721

ANSI

American National Standards Institute

 

11 West Street, 13th Floor

 

New York, NY 10036

 

Telephone: (212) 642-4900

 

Fax: (212) 302-1286

ASHRAE American Society of Heating, Refrigerating,

and Air Conditioning Engineers, Inc.

1791 Tullie Circle, N.E.

Atlanta, GA 30329-2305

Telephone: (404) 636-8400

Fax: (404) 321-5478

NFPA

National Fire Protection Association

 

Batterymarch Park

 

P.O. Box 9101

 

Quincy, MA 02269-9901

 

Telephone: (800) 344-3555

 

Fax: (617) 984-7057

Manufactured under the following U.S. patent numbers: 5,485,878; 5,301,777; 5,002,116; 4,924,934; 4,875,520; 4,825,936; 4,432,409

Manual 2100-348

Page 1

WALL MOUNT GENERAL INFORMATION

AIR CONDITIONING WALL MOUNT MODEL NOMENCLATURE

MODEL NUMBER

WA

 

 

CAPACITY

 

60 - 5 Ton

 

 

REVISIONS

FEATURE CODE

 

3

- 3 ton air openings

 

 

on 5 ton cabinet

VOLTS & PHASE

2

- 2 ton air openings

A - 230/208/60/1

 

on 5 ton cabinet

B - 230/208/60/3

60 2 3 A 10 X N X X X A

 

CONTROL MODULES

 

 

 

 

 

 

 

 

 

COIL OPTIONS

 

 

 

 

 

 

 

X -

Standard

 

 

 

 

 

COLOR OPTIONS

1

-

Phenolic Coated Evaporator

 

KW

2

-

Phenolic Coated Condenser

 

X - Beige (Standard)

3

-

Phenolic Coated Evaporator

 

 

 

 

 

1

- White

 

 

and Condenser

 

 

 

 

 

2

- Mesa Tan

 

 

 

VENTILATION OPTIONS

4

- Buckeye Gray

OUTLET OPTIONS

 

 

X -

Front (Standard)

 

 

 

 

 

 

 

B - Blank-off Plate

FILTER OPTIONS

N - No Filter WA4823, WA6023, WA602N models ONLY

X -

One Inch Throwaway Filter

WA4822, WA6022 models ONLY

W -

One Inch Washable Filter

WA4822, WA6022 models ONLY

P - Two Inch Pleated Filter WA4822, WA6022 models ONLY

NOTE: All vent options are without exhaust capability. May require separate field supplied barometric relief in building.

Model WA602N is identical to Model WA6023. All references in this manual to WA6023 apply to WA602N also.

TABLE 1

ELECTRIC HEAT TABLE

Models

 

WA6023A ONLY

 

 

WA6023B ONLY

 

 

 

 

 

 

 

 

 

 

 

240V-1

208V-1

240V-1

208V-1

 

 

 

 

 

 

 

 

 

KW

AMPS

BTUH

AMPS

BTUH

AMPS

BTUH

AMPS

BTUH

5.0

20.8

17,050

18.1

12,800

-----

-----

-----

-----

 

 

 

 

 

 

 

 

 

9.0

-----

-----

-----

-----

21.7

30,600

18.7

23,030

10.0

41.6

34,130

36.2

25,600

-----

-----

-----

-----

 

 

 

 

 

 

 

 

 

WA4822A, WA4822B, WA4823A, WA4823B, WA6022A, WA6022B are not approved for use with electric heat.

Manual 2100-348

Page 2

Page

Manual

3

348-2100

 

FIGURE 1

UNIT DIMENSIONS

WA602N, WA6023, WA4823 ONLY

MIS-1348

348-2100 Manual

4 Page

FIGURE 2

UNIT DIMENSIONS

WA6022, WA4822 ONLY

MIS-1442

Page

Manual

5

348-2100

 

TABLE 2

ELECTRICAL SPECIFICATIONS

SINGLE CIRCUIT

DUAL CIRCUIT

 

 

 

3

1

2

2

3

1

2

2

 

 

 

 

Maximum

 

 

Minimum

Maximum

 

 

 

 

 

 

No.

 

 

 

External Fuse

 

 

 

 

 

 

 

External

Field

 

Circuit

or

Field Power

Ground

 

Rated

Field

Minimum

Fuse or

Power

Ground

Ampacity

Ckt. Breaker

Wire Size

Wire Size

 

Volts &

Power

Circuit

Ckt.

Wire

Wire

 

 

 

 

 

 

 

 

 

CKT A

CKT B

CKT A

CKT B

CKT A

CKT B

CKT A

CKT B

Model

Phase

Circuits

Ampacity

Breaker

Size

Size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA4822A00, A0Z

230/208-1

1

38

50

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA4822B00, B0Z

230/208-3

1

26

35

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA4823A00, A0Z

230/208-1

1

38

50

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA4823B00, B0Z

230/208-3

1

26

35

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA6022A00, A0Z

 

1

44

60

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

A05

230/208-1

1

44

60

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

A10

 

1

55

60

6

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

WA6022B00, B0Z

230/208-3

1

32

45

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

B09

1

34

45

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

WA6023A00, A0Z

 

1

44

60

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

A05

230/208-1

1

44

60

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

A10

 

1

55

60

6

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

WA6023B00, B0Z

230/208-3

1

32

45

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

B09

1

34

45

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

WA602NA00, A0Z

 

1

44

60

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

A05

230/208-1

1

44

60

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

A10

 

1

55

60

6

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

WA602NB00, B0Z

230/208-3

1

32

45

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

B09

1

34

45

8

10

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

j Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors. k Based on 75° C copper wire. All Wiring must conform to NEC and all local codes.

lThese “minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric Code (latest revision), article 310 for power conductor sizing. CAUTION: When more than one field power conductor circuit is run through one conduit, the conductors must be derated. Pay special attention to note 8 of table 310 regarding Ampacity Adjustment Factors when more than 3 conductors are in a raceway.

SHIPPING DAMAGE

Upon receipt of equipment, the carton should be checked for external signs of shipping damage. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent.

GENERAL

The equipment covered in this manual is to be installed by trained, experienced service and installation technicians.

The refrigerant system is completely assembled and charged. All internal wiring is complete.

The unit is designed for use with or without duct work. Flanges are provided for attaching the supply and return ducts.

These instructions explain the recommended method to install the air cooled self-contained unit and the electrical wiring connections to the unit.

While these instructions are intended as a general recommended guide, they do not supersede any national and/or local codes in any way. Authorities having jurisdiction should be consulted before the installation is made. See Page 1 for information on codes and standards.

Size of unit for a proposed installation should be based on heat loss calculation made according to methods of Air Conditioning Contractors of America (ACCA). The air duct should be installed in accordance with the Standards of the National Fire Protection Association for the Installation of Air Conditioning and Ventilating Systems of Other Than Residence Type, NFPA No. 90A, and Residence Type Warm Air Heating and Air Conditioning Systems, NFPA No. 90B. Where local regulations are at a variance with instructions, installer should adhere to local codes.

Design the duct work according to methods given by the Air Conditioning Contractors of America (ACCA). When duct runs through unheated spaces, it should be insulated with a minimum of one inch of insulation. Use insulation with a vapor barrier on the outside of the insulation. Flexible joints should be used to connect the duct work to the equipment in order to keep the noise transmission to a minimum.

A 1/4 inch clearance to combustible material for the first three feet of duct attached to the outlet air frame is required. See Wall Mounting Instructions and Figures 3 and 3A for further details.

Ducts through the walls must be insulated and all joints taped or sealed to prevent air or moisture entering the wall cavity.

Some installations may not require any return air duct. A metallic return air grille is required with installations not requiring a return air duct. The spacing between louvers on the grille shall not be larger than 5/8 inch.

NOTE: If no return air duct is used, applicable installation codes may limit this cabinet to installation only in a single story structure.

Any grille that meets with 5/8 inch louver criteria may be used. It is recommended that Bard Return Air Grille Kit RG2 through RG5 or RFG2 through RFG5 be installed when no return duct is used. Contact distributor or factory for ordering information. If using a return air filter grille, filters must be of sufficient size to allow a maximum velocity of 400 fpm.

CONDENSATE DRAIN

A plastic drain hose extends from the drain pan at the top of the unit down to the unit base. There are openings in the unit base for the drain hose to pass through. In the event the drain hose is connected to a drain system of some type, it must be an open or vented type system to assure proper drainage.

DUCT WORK

All duct work, supply and return, must be properly sized for the design air flow requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage.

These instructions and any instructions packaged with any separate equipment, required to make up the entire air conditioning system should be carefully read before beginning the installation. Note particularly any tags and/ or labels attached to the equipment.

FILTERS

WA6022 AND WA4822 ONLY

A one inch throw away filter is supplied with each unit. The filter slides into position making it easy to service. This filter can be serviced from the outside by removing the service door. A one inch washable filter and a two inch pleated filter are also available as optional accessories. The internal filter brackets are adjustable to accommodate the two inch filter by bending the metal tabs holding the 1 inch filter down. There are two tabs on each side of the filter.

NOTE: WA6023 and WA4823 models require the use of a return air filter grille.

Manual 2100-348

Page 6

INSTALLATION INSTRUCTIONS

WALL MOUNTING INFORMATION

1.Two holes for the supply and return air openings must be cut through the wall as shown in Figure 1 or 2. Figure 1 is for models WA4823, and WA6023. Figure 2 is for Models WA4822 and WA6022.

2.On wood frame walls, the wall construction must be strong and rigid enough to carry the weight of the unit without transmitting any unit vibration.

WARING

Fire hazard can result if 1/4 inch clearance to combustible materials for supply air duct is not maintained. See Figure 3.

3.Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit.

WA4822 AND WA6022 ONLY

These units are equipped with adjustable return and supply air flanges. The flanges are adjustable side to side in 1” increments. This allows these units to be adjusted so that in side by side applications these units can replace two 2 Ton units using the same wall openings.

MOUNTING THE UNIT

1.These units are secured by wall mounting brackets which secure the unit to the outside wall surface at both sides. A bottom mounting bracket is provided for ease of installation, but is not required.

2.The unit itself is suitable for 0 inch clearance, but the supply air duct flange and the first 3 feet of supply air duct require a minimum of 1/4 inch clearance to combustible material. If a combustible wall use a minimum of 30-1/2” x 10-1/2” dimensions for sizing. However it is generally recommended that a 1 inch clearance is used for ease of installation and maintaining the required clearance to combustible material. The supply air opening would then be 32” x 12”. See Figures 2 and 3 for details.

WARNING

Failure to provide the 1/4 inch clearance between the supply duct and a combustible surface for the first 3 feet of duct can result in fire causing damage, injury or death.

3.Locate and mark lag bolt locations and bottom mounting bracket location. See Figure 2.

4.Mount bottom mounting bracket.

5.Hook top rain flashing under back bend of top. Top rain flashing is shipped secured to the right side of the back.

6.Position unit in opening and secure with 5/16 lag bolts; use 7/8 inch diameter flat washers on the lag bolts.

7.Secure rain flashing to wall and caulk across entire length of top. See Figure 2.

8.For additional mounting rigidity, the return air and supply air frames or collars can be drilled and screwed or welded to the structural wall itself (depending upon wall construction). Be sure to observe required clearance if combustible wall.

9.On side by side installations, maintain a minimum of 20 inches clearance on right side to allow access to control panel and heat strips, and to allow proper airflow to the outdoor coil. Additional clearance may be required to meet local or national codes.

Manual 2100-348

Page 7

348-2100 Manual

8 Page

FIGURE 3

MOUNTING INSTRUCTIONS

WA602N, WA6023, WA4823 ONLY

MIS-1349

Page

Manual

9

348-2100

 

FIGURE 4

MOUNTING INSTRUCTIONS

WA6022, WA4822 ONLY

MIS-1444

FIGURE 5

ELECTRIC HEAT CLEARANCE

SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR WALL

MOUNTED UNIT SHOWING 1/4 INCH CLEARANCE TO

COMBUSTIBLE SURFACES.

MIS-277

WARNING

A minimum of 1/4 inch clearance must be maintained between the supply air duct and combustible materials. This is required for the first 3 feet of ducting.

It is important to insure that the 1/4 inch minimum spacing is maintained at all points.

Failure to do this could result in overheating the combustible material and may result in a fire causing damage, injury or death.

Manual 2100-348

Page 10

FIGURE 6

WALL MOUNTING INSTRUCTIONS

SEE FIGURE 3 – MOUNTING INSTRUCTIONS

SUPPLY AIR

SUPPLY AIR

OPENING

OPENING

RETURN AIR

RETURN AIR

OPENING

OPENING

WALL STRUCTURE

FACTORY SUPPLIED RAIN

FLASHING.MOUNT ON UNIT

BEFORE INSTALLATION

SUPPLYAIR

OPENING

RETURN AIR

OPENING

BOTTOM MOUNTING

BRACKET. MOUNT ON WALL

BEFORE INSTALLING UNIT.

MIS-548

FIGURE 7

WALL MOUNTING INSTRUCTIONS

 

FRAMING MATERIAL

 

2 X 4’S, 2 X 6’S AND/OR

MIS-549

STRUCTURAL STEEL

 

SEE UNIT DIMENSIONS, FIGURE

 

1, FOR ACTUAL DIMENSIONS

ATTACH TO TOP

 

PLATE OF WALL

 

1.000” CLEARANCE

 

ALL AROUND

 

 

SUPPLY DUCT

INTERIOR FINISHED WALL

OPENING

 

OVER FRAME

 

1.000” CLEARANCE

 

ALL AROUND

 

 

RETURN DUCT

 

OPENING

EXTERIOR FINISHED WALL

 

OVER FRAME

 

ATTACH TO BOTTOM

THIS STRUCTURAL MEMBER LOCATED TO MATCH

PLATE OF WALL

STUD SPACING FOR REST OF WALL. A SECOND

 

 

MEMBER MAY BE REQUIRED FOR SOME WALLS.

Manual 2100-348

Page 11

FIGURE 8

COMMON WALL MOUNTING INSTALLATIONS

 

FREE AIR FLOW

NO DUCT

DUCTED SUPPLY RETURN AT UNIT

 

FALSE WALL INSTALLATION

CLOSET INSTALLATION

 

 

 

MIS-550

Manual

2100-348

 

 

Page 12

 

 

 

WIRING – MAIN POWER

Refer to the unit rating plate for wire sizing information and maximum fuse or “HACR” type circuit breaker size. Each outdoor unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two field power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire. Each unit and/or wiring diagram will be marked “Use Copper Conductors Only”. These instructions must be adhered to. Refer to the National Electrical Code (NEC) for complete current carrying capacity data on the various insulation grades of wiring material. All wiring muse conform to NEC and all local codes.

The electrical data lists fuse and wire sizes (75° C copper) for all models including the most commonly used heater sizes. Also shown are the number of field power circuits required for the various models with heaters.

The unit rating plate lists a “Maximum Time Delay Relay Fuse” or “HACR” type circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.

The disconnect access door on this unit may be locked to prevent unauthorized access to the disconnect. To convert for the locking capability, bend the tab locate in the bottom left hand corner of the disconnect opening under the disconnect access panel straight out. This tab will now line up with the slot in the door. When shut a padlock may be placed through the hole in the tab preventing entry.

See “Start Up” section for important information on three phase scroll compressor start ups.

WIRING – LOW VOLTAGE WIRING

230 / 208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are:

TAP

RANGE

240

253 – 216

208

220 – 187

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).

Five (5) wires should be run from thermostat subbase to the 24V terminal board in the unit. A five conductor, 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in Figure 9:

TABLE 3

THERMOSTAT WIRE SIZE

 

 

 

Maximum

Transformer

 

 

Distance

VA

FLA

Wire Gauge

In Feet

 

 

20 gauge

45

 

 

18 gauge

60

55

2.3

16 gauge

100

 

 

14 guage

160

 

 

12 guage

250

TABLE 4

WALL THERMOSTAT AND SUBBASE COMBINATIONS

Thermostat

Subbase

Predominate Features

 

 

 

8403-002

8404-003

1 stage heat, 1 stage cool

T87F3111

Q539A1220

System: heat-off-cool

Fan: auto-on

 

 

 

8403-041

---

1 stage heat, 1 stage cool

T8034C

 

System: heat-off-cool

Fan: auto-on

 

 

 

8403-019

8404-012

1 stage cool, 2 stage heat

T874C1760

Q674A1001

System: heat-auto-cool Fan: auto-on

 

 

 

8403-021

8404-012

2 stage cool, 2 stage heat

T874D1934

Q674A1001

System: heat-auto-cool Fan: auto-on

 

 

 

8403-035

---

2 stage cool, 2 stage heat

1F95-80

 

Electronic 7 day programming

 

 

 

8403-043

---

1 stage heat, 1 stage cool

CM-200

System: heat-off-cool

Fan: auto-on

 

 

 

 

 

Manual 2100-348

Page 13

FIGURE 9

UNIT 24V TERMINAL BOARD

 

MIS-1373A

Manual

2100-348

Page 14

 

START UP

IMPORTANT INSTALLER NOTE

For improved start up performance wash the indoor coil with a dish washing detergent.

CRANKCASE HEATERS

These units are not provided with crankcase heat. These units utilize scroll compressors which do not require crankcase heat in this application.

HIGH PRESSURE SWITCH

The models are supplied with a remote reset high pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.

THREE PHASE SCROLL COMPRESSOR START UP INFORMATION

Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.

However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a 50-50 chance of connecting power in such a way as to cause rotation in the reverse direction, verification of proper rotation must be made. Verification of proper rotation direction is made by observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse rotation also results in an elevated sound level over that with correct rotation, as well as, substantially reduced current draw compared to tabulated values.

Verification of proper rotation must be made at the time the equipment is put into service. If improper rotation is corrected at this time there will be no negative impact on the durability of the compressor. However, reverse operation for over one hour may have a negative impact on the bearing due to oil pump out.

NOTE: If compressor is allowed to run in reverse rotation for several minutes, the compressor’s internal protector will trip.

All three phase ZR3 compressors are wired identically internally. As a result, once the correct phasing is determined for a specific system or installation, connecting properly phased power leads to the same Fusite terminal should maintain proper rotation direction.

The direction of rotation of the compressor may be changed by reversing any two line connections to the unit.

SERVICE HINTS

1.Caution homeowner to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces air flow through the system, which shortens equipment service life as well as increasing operating costs.

2.Switching to heating cycle at 75° F or higher outside temperature may cause a nuisance trip of the remote reset high pressure switch. Turn thermostat off then on to reset the high pressure switch.

3.Check all power fuses or circuit breakers to be sure they are the correct rating.

4.Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.

SEQUENCE OF OPERATION

COOLING – Circuit R-Y makes at thermostat pulling in compressor contactor, starting the compressor and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation or can be energized by manual fan switch on subbase of constant air circulation. On all 230 volt units there is a one minute off delay on the blower motor. 460 volt models do not have an off delay.

COMPRESSOR CONTROL MODULE

The compressor control module is standard on the models covered by this manual. The compressor control is an anti-short cycle/lockout timer with high and low pressure switch monitoring and alarm relay output.

Adjustable Delay On Make And Break Timer

On initial power up or any time power is interrupted to the unit the delay on make period begins which will be 2 minutes plus 10% of the delay on break setting. When the delay on make is complete and the high pressure switch (and low pressure switch if employed) is closed, the compressor contactor is energized. Upon shutdown the delay or break timer starts and prevents restart until the delay on break and delay on make periods have expired.

During routine operation of the unit with no power interruptions the compressor will operate on demand with no delay.

Manual 2100-348

Page 15

High Pressure Switch and Lockout Sequence

If the high pressure switch opens, the compressor contactor will de-energize immediately. The lockout timer will go into a soft lockout and stay in soft lockout until the high pressure switch closes and the delay on break time has expired. If the high pressure switch opens again in this same operating cycle the unit will go into manual lockout condition and the alarm relay circuit will energize. Recycling the wall thermostat resets the manual lockout.

Low Pressure Switch, Bypass, and Lockout

Sequence

If the low pressure switch opens for more than 120 seconds, the compressor contactor will de-energize and go into a soft lockout. Regardless the state of the low pressure switch, the contactor will reenergize after the delay on make time delay has expired. If the low pressure switch remains open, or opens again for longer than 120 seconds the unit will go into manual lockout condition and the alarm relay circuit will energize. Recycling the wall thermostat resets the manual lockout.

Alarm Relay Output

Alarm terminal is output connection for applications where alarm relay is employed. This terminal is powered whenever compressor is locked out due to HPC or LPC sequences as described.

NOTE: Both high and low pressure switch controls are inherently automatic reset devices. The high pressure switch and low pressure switch cut out and cut in settings are fixed by specific air conditioner or heat pump unit model. The lockout features, both soft and manual, are a function of the Compressor Control Module.

ADJUSTMENTS

Adjustable Delay on Make and Delay on Break Timer

The potentiometer is used to select Delay on Break time from 30 seconds to 5 minutes. Delay on Make (DOM) timing on power-up and after power interruptions is equal to 2 minutes plus 10% of Delay on Break (DOB) setting:

0.5 minute

(30 seconds)

DOB = 123 second DOM

1.0 minute

(60 seconds)

DOB = 126 second DOM

2.0 minute

(120 seconds) DOB = 132 second DOM

3.0 minute

(180 seconds) DOB = 138 second DOM

4.0 minute

(240 seconds) DOB = 144 second DOM

5.0 minute

(300 seconds) DOB = 150 second DOM

During routine operation of the unit with no power interruptions the compressor will operate on demand with no delay.

Typical Settings for Dual Unit Installation:

Unit 1: DOB set at 2 minutes, and DOM is 132 seconds.

Unit 2: DOB set at 4 minutes, and DOM is 144 seconds.

PHASE MONITOR

All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal.

The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light.

If phases are reversed, the red fault LED will be lit and compressor operation is inhibited.

If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur.

PRESSURE SERVICE PORTS

High and low pressure service ports are installed on all units so that the system operating pressures can be observed. A pressure table can be found later in the manual covering all models. It is imperative to match the correct pressure table to the unit by model number.

Manual 2100-348

Page 16

TROUBLESHOOTING

FAN BLADE SETTING DIMENSIONS

REFRIGERANT CHARGE

Shown in Figure 10 is the correct fan blade setting dimension for proper air delivery across the outdoor coil.

Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor shaft accordingly.

FIGURE 10

TABLE 5

 

Dimension

Model

A

 

 

WA602N

1.75

 

 

REMOVAL OF FAN SHROUD

1.Disconnect all power to the unit.

2.Remove the screws holding both grilles, one on each side of unit, and remove grilles.

3.Remove screws holding fan shroud to condenser and bottom. Nine (9) screws.

4.Unwire condenser fan motor.

5.Slide complete motor, fan blade, and shroud assembly out the left side of the unit.

6.Service motor/fan as needed.

7.Reverse steps to reinstall.

The correct system R-22 charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge resulting in a suction line temperature (6” from compressor) as shown in Table 7.

TABLE 7

REFRIGERANT CHARGE

 

Rated

95 OD

82 OD

Model

Airflow

Temperature

Temperature

 

 

 

 

WA602

1700

53 - 55

60 - 62

 

 

 

 

WA482

1550

54 - 56

65 - 67

 

 

 

 

The suction line temperatures in table above are based upon 80° F dry bulb / 67° F wet bulb (50% R.H.) temperature and rated airflow across the evaporator during cooling cycle.

TABLE 8

RATED CFM AND ESP

 

Rated

 

Recommended

Model

CFM

ESP

Airflow Range

 

 

 

 

 

 

WA602N

1425

0.20

1775 - 1425

j

 

 

 

 

 

WA6023

1425

0.20

1775 - 1425

j

 

 

 

 

 

WA6022

1525

0.20

1850 - 1525

k

 

 

 

 

 

WA4823

1350

0.20

1600 - 1350

j

 

 

 

 

 

WA4822

1400

0.20

1700 - 1400

k

 

 

 

 

 

jRated CFM & ESP on High Speed tap with 14 x 28 return air filter grille

kRated CFM & ESP on High Speed tap with 20 x 30 filter

TABLE 6

INDOOR BLOWER PERFORMANCE

CFM @ 230V

 

 

WA602N

 

 

 

 

 

 

 

 

 

WA6023

WA6022

WA4823

WA4822

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High Speed

High Speed

High Speed

High Speed

 

 

E.S.P.

 

 

 

 

 

 

 

 

 

 

Dry

Wet

Dry

Wet

Dry

Wet

Dry

Wet

 

 

In H2O

Coil

Coil

Coil

Coil

Coil

Coil

Coil

Coil

 

 

.0

1775

1600

1850

1675

1600

1525

1700

1625

 

 

.1

1675

1525

1755

1600-

1525

1425

1600

1525

 

 

.2

1575

1425

1700

1525

1425

1350

1475

1400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Manual 2100-348

Page 17

TABLE 9

MAXIMUM ESP OF OPERATION

ELECTRIC HEAT ONLY

MODELS

 

ESP

 

 

 

 

 

 

A05

.4

WA6023 - ONLY

 

A10

.3

 

 

B09

.3

 

 

 

 

Values shown are for units equipped with standard 1” throwaway filters or 1” washable filters. Derate ESP by .15 for 2” pleated filters.

TABLE 10

PRESSURE TABLE

COOLING

 

 

 

Air Temperature Entering Outdoor Coil °F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Return Air

 

 

 

 

 

 

 

 

 

 

 

Model

Temperature

Pressure

75

80

85

90

95

100

105

110

115

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75 deg. DB

Low Side

71

72

74

75

76

77

78

78

79

 

 

62 deg. WB

High Side

233

247

262

278

295

313

331

351

371

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA602

80 deg. DB

Low Side

76

78

79

80

81

82

83

84

85

 

67 deg. WB

High Side

237

253

269

285

303

321

340

360

381

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

85 deg. DB

Low Side

84

85

85

86

87

88

89

90

91

 

 

72 deg. WB

High Side

245

261

278

296

314

333

353

373

394

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75 deg. DB

Low Side

73

74

76

78

79

80

82

83

84

 

 

62 deg. WB

High Side

204

217

232

248

265

284

304

325

348

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WA482

80 deg. DB

Low Side

78

79

81

82

84

86

87

89

90

 

67 deg. WB

High Side

210

223

238

254

272

291

312

334

357

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

85 deg. DB

Low Side

84

85

87

88

90

92

93

95

97

 

 

72 deg. WB

High Side

217

231

247

264

282

302

323

345

369

 

 

 

 

 

 

 

 

 

 

 

 

 

Low side pressure ± 2 PSIG

High side pressure ± 5 PSIG

Tables are based upon rated CFM (airflow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharged to serial plate instructions.

Manual 2100-348

Page 18

TABLE 11

OPTIONAL ACCESSORIES

Part

Number Description

WA6023A. WA6022A

WA6023B, WA6022B

WA4823A, WA4822A

WA4823B, WA4822B

CMC-15

Start Kit

X

 

X

 

 

 

 

 

 

 

WMCB-09A

Circuit Breaker Kit

X

 

 

 

WMCB-07B

Circuit Breaker Kit

 

X

 

 

WMCB-08A

Circuit Breaker Kit

 

 

X

 

WMCB-05B

Circuit Breaker Kit

 

 

 

X

 

 

 

 

 

 

Manual 2100-348

Page 19