Bard WA602 User Manual

INST ALLA TION INSTRUCTIONS
W ALL MOUNTED
P ACKAGE AIR CONDITIONERS
MODELS
WA421 WA482 WA602
Bard Manufacturing Company Bryan, Ohio 43506
Since 1914...Moving ahead, just as planned.
Manual : 2100-218I Supersedes: 2100-218H File: Volume III Tab 16 Date: 04-19-99
© Copyright 1999
Contents
Getting Other Information and Publications .......... 1
Wall Mount General Information ............................. 2
Heat Pump Wall Mount Model Nomenclature.......... 2
Shipping Damage .................................................... 5
General ................................................................ 5
Duct Work................................................................ 5
Filters ................................................................ 6
Fresh Air Intake........................................................ 6
Condensate Drain .................................................... 6
Installation Instructions ........................................... 7
Wall Mounting Information ....................................... 7
Mounting the Unit ..................................................... 7
Wiring – Main Power.............................................. 12
Wiring – Low Voltage Wiring.................................. 12
Figures
Figure 1 Unit Dimensions ...................................... 3
Figure 2 Fresh Air Damper Assembly ................... 6
Figure 3 Mounting Instructions............................... 8
Figure 4 Electric Heat Clearance .......................... 9
Figure 5 Wall Mounting Instructions..................... 10
Figure 5 Wall Mounting Instructions..................... 10
Figure 7 Common Wall Mounting Installations......11
Figure 8 Unit 24V Terminal Board ....................... 13
Figure 9 Starting Procedure ................................ 14
Figure 10 Fan Blade Setting.................................. 17
Start Up ................................................................... 14
Important Installer Note.......................................... 14
Crankcase Heaters ................................................ 14
High Pressure Switch............................................. 14
Three Phase Scroll Compressor Start Up.............. 14
Condenser Fan Operation...................................... 14
Service Hints.......................................................... 15
Sequence of Operation.......................................... 15
Compressor Control Module .................................. 15
Adjustments ........................................................... 15
Phase Monitor........................................................ 16
Pressure Service Ports .......................................... 16
Troubleshooting ..................................................... 17
Fan Blade Setting Dimensions ............................... 17
Removal of Fan Shroud......................................... 17
Refrigerant Charge ................................................ 17
Pressure T able....................................................... 18
Optional Accessories ............................................. 19
Tables
Table 1 Electric Heat Table .................................. 2
Table 2 Electrical Specifications........................... 4
Table 3 Thermostat Wire Size ........................... 12
Table 4 Wall thermostat and Subbase
Combinations ........................................ 12
T able 5 Fan Blade Dimensions .......................... 17
Table 6 Refrigerant Charge ............................... 17
Table 7 Indoor Blower Performance .................. 17
Table 8 Recommended Air Flow........................ 18
Table 9 Maximum EXP 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, Refrigeration
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 2100-218 Page 1
WALL MOUNT GENERAL INFORMATION
HEAT PUMP WALL MOUNT MODEL NOMENCLATURE
MODEL NUMBER
CAPACITY
42 - 3 1/2 Ton 48 - 4 Ton 60 - 5 Ton
VOLTS & PHASE
A - 230/208/60/1 B - 230/208/60/3 C - 460/60/3
NOTE: All vent options are without exhaust capability. May require separate field supplied barometric relief in building.
REVISIONS
WA 42 1 – A 10 X N X X X A
COLOR OPTIONS
X - Beige (Standard) 1 - White
KW
VENTILATION OPTIONS
X - Barometric Fresh Air Damper (Standard) B - Blank-off Plate M - Motorized Fresh Air Damper V - Commercial Ventilator -
Motorized with Exhaust
E - Economizer (Internal) - Fully
Modulating with Exhaust
R - Energy Recovery Ventilator -
Motorized with Exhaust
2 - Mesa Tan 4 - Buckeye Gray 5 - Desert Brown 6 - Dark Bronze
FILTER OPTIONS
X - One Inch Throwaway (Standard) W- One Inch Washable P - Two Inch Pleated
CONTROL MODULES
(See Chart Below)
COIL OPTIONS
X - Standard 1 - Phenolic Coated Evaporator 2 - Phenolic Coated Condenser 3 - Phenolic Coated Evaporator
and Condenser
OUTLET OPTIONS
X - Front (Standard)
TABLE 1
ELECTRIC HEAT TABLE
A-124AW
sledoM
A-284AW A-206AW
1-0421-8023-0423-8023-064
WKAUTBAUTBAUTBAUTBAUTB
58.02050711.8100821
97.12006037.81030328.0100703
016.14031432.6300652
515.26002150.45004832.63002152.13004833.7100074
813.34034165.7300164
022.38062861.2700215
B-124AW B-284AW B-206AW
C-124AW C-284AW C-206AW
Manual 2100-218 Page 2
FIGURE 1
UNIT DIMENSIONS
htdiW
ledoM
)W(
24AW 84AW
570.24234.22578.4888.988.9288.5188.9288.3401.9166.1300.0386.2349.6296.4334.2373.388.2488.3200.0144.100.6188.1
htpeD
)D(
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)H(
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EFGIJKLMNOPQRSTABCB
Manual 2100-218
Page 3
FRONT VIEW BACK VIEWSIDE VIEW
Optional top outlet (factory installed only) for WA30 and WA36 models only.
*
MIS-1262
TABLE 2
ELECTRICAL SPECIFICATIONS
TIUCRICELGNIS TIUCRICLAUD
detaR
&stloV
ledoM
Z0A,00A-124AW 50A 01A 51A 02A
Z0B,00B-124AW 90B 51B 81B
Z0C,00C-124AW 90C 51C
Z0A,00A-284AW 50A 01A 51A 02A
Z0B,00B-284AW 90B 51B 81B
Z0C,00C-281AW 90C 51C
Z0A,00A-206AW 50A 01A 51A 02A
Z0B,00B-206AW 90B 51B 81B
Z0C,00C-203AW 90C 51C
esahP
3-064
3-064
3-064
dleiF
rewoP
stiucriC
1 1
1-802/032
1
2ro1 2ro1
1 1
3-802/032
1 1
1 1 1
1 1
1-802/032
1
2ro1 2ro1
1 1
3-802/032
1 1
1 1 1
1 1
1-802/032
1
2ro1 2ro1
1 1
3-802/032
1 1
1 1 1
muminiM tiucriC
yticapmA
33 33 95 58
011
42 43 25 06
21 71 62
83 83 95 58
011
62 43 25 06
31 71 62
44 44 55 58
011
23 43 25 06
61 71 62
mumixaM
lanretxE
roesuF
tiucriC
rekaerB
05 05 06 09
011
53 53 05 06
51 02 03
05 05 06 09
011
53
53
06
06
51
02
03
06
06
06
09
011
54 54
06
06
02
02
03
dleiF
rewoP
eriW
eziS
8 8 6 4 2
8 8 6 6
41 21 01
8 8 6 4 2
8 8 6 6
41 21 01
8 8 6 4 2
8 8 6 6
21 21 01
dnuorG eriW eziS
01 01
01 8 6
01
01
01
01
41
21
01
01
01
01 8 6
01
01
01
01
41
21
01
01
01
01 8 6
01
01
01
01
21
21
01
muminiM tiucriC
yticapmA
ATKCBTKCATKCBTKCATKCBTKCATKCBTKC
A/N
A/N
A/N
A/N
A/N
A/N
65
62
65
25
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
95
62
95
25
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
95
62
95
25
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
mumixaM
esuFlanretxE
A/N
A/N
A/N
A/N
A/N
A/N
06
03
06
06
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
06
03
06
06
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
06
03
06
06
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
rewoPdleiF
eziSeriW
A/N
A/N
A/N
A/N
A/N
A/N
6
01
6
6
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
6
01
6
6
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
6
01
6
6
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
dnuorG
eziSeriW
A/N
A/N
A/N
A/N
A/N
A/N
01
01
01
01
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
01
01
01
01
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
01
01
01
01
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
A/N
Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
Based on 75° C copper wire. All wiring must conform to NEC and all local codes.
These 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.
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.
Manual 2100-218 Page 4
CAUTION: When more than
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.
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 “Starting Procedure” and any tags and/or labels attached to the equipment.
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.
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.
Refer to Table 10 for maximum static pressure available for duct design.
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 4 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.
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.
NOTE: If no return air duct is used, applicable installation
codes may limit this cabinet to installation only in a single story structure.
Manual 2100-218 Page 5
FILTERS
A one inch throwaway 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 two inch pleated filter are also available as optional accessories. The internal filter brackets are adjustable to accommodate the two inch filter by loosening two (2) screws on each bracket assembly and sliding the brackets apart to the required width and retightening the four (4) screws.
the damper to operate, the maximum and minimum blade position stops must be installed. See Figure 2.
All capacity, efficiency and cost of operation information as required for Department of Energy “Energyguide” Fact Sheets is based upon the fresh air blank-off plate in place and is recommended for maximum energy efficiency.
The blank-off plate is available upon request from the factory and is installed in place of the fresh air damper shipped with each unit.
FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in the service panel.
If the unit is equipped with a fresh air damper assembly, the assembly is shipped already attached to the unit. The damper blade is locked in the closed position. To allow
FIGURE 2
FRESH AIR DAMPER
BLADE IS LOCKED CLOSED FOR SHIPPING.
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.
Manual 2100-218 Page 6
MIS-938
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings must be cut through the wall as shown in Figure 3.
INSTALLATION INSTRUCTIONS
WARNING
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.
3. Concrete block walls must be thoroughly inspected to insure that they are capable of carrying the weight of the installed unit.
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 3 and 4 for details.
3. Locate and mark lag bolt locations and bottom mounting bracket location. See Figure 3.
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.
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 3.
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 2100-218 Page 7
Manual 2100-218
Page 8
FIGURE 3
MOUNTING INSTRUCTIONS
MIS-416
FIGURE 4
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
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.
of 1/4 inch clearance must be maintained between the
Manual 2100-218 Page 9
FIGURE 5
WALL MOUNTING INSTRUCTIONS
SUPPLY AIR OPENING
RETURN AIR OPENING
SEE FIGURE 3 – MOUNTING INSTRUCTIONS
SUPPLY AIR OPENING
RETURN AIR OPENING
FACTORY SUPPLIED RAIN FLASHING. MOUNT ON UNIT BEFORE INSTALLATION
BOTTOM MOUNTING BRACKET. MOUNT ON WALL BEFORE INSTALLING UNIT.
WALL STRUCTURE
SUPPLY AIR OPENING
RETURN AIR OPENING
MIS-548
FIGURE 6
WALL MOUNTING INSTRUCTIONS
ATTACH TO TOP PLATE OF WALL
1.000 CLEARANCE ALL AROUND
INTERIOR FINISHED WALL OVER FRAME
1.000 CLEARANCE ALL AROUND
EXTERIOR FINISHED WALL OVER FRAME
SEE UNIT DIMENSIONS, FIGURE 1, FOR ACTUAL DIMENSIONS
SUPPLY DUCT OPENING
RETURN DUCT OPENING
MIS-549
Manual 2100-218 Page 10
FRAMING MATERIAL 2 X 4S, 2 X 6S AND/OR STRUCTURAL STEEL
ATTACH TO BOTTOM PLATE OF WALL
THIS STRUCTURAL MEMBER LOCATED TO MATCH STUD SPACING FOR REST OF WALL. A SECOND MEMBER MAY BE REQUIRED FOR SOME WALLS.
FIGURE 7
COMMON WALL MOUNTING INSTALLATIONS
FREE AIR FLOW NO DUCT
DUCTED SUPPLY RETURN AT UNIT
FALSE WALL INSTALLATION
CLOSET INSTALLATION
MIS-550
Manual 2100-218 Page 11
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 located 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.
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 8:
TABLE 3
THERMOSTAT WIRE SIZE
mumixaM
remrofsnarT
AVALFeguaGeriW
553.2
eguag02 eguag81 eguag61 egaug41 egaug21
ecnatsiD
teeFnI
54 06
001 061 052
See “Start Up” section for important information on three phase scroll compressor start ups.
WALL THERMOSTAT AND SUBBASE COMBINATIONS
tatsomrehTesabbuSserutaeFetanimoderP
200-3048
1113F78T
140-3048
C4308T
910-3048
0671C478T
120-3048
4391D478T
530-3048
08-59F1
340-3048
002-MC
Manual 2100-218 Page 12
300-4048
0221A935Q
---loocegats1,taehegats1
210-4048
1001A476Q
210-4048
1001A476Q
---taehegats2,loocegats2
---
TABLE 4
loocegats1,taehegats1
no-otua:naFlooc-ffo-taeh:metsyS
no-otua:naFlooc-ffo-taeh:metsyS
taehegats2,loocegats1
no-otua:naFlooc-otua-taeh:metsyS
taehegats2,loocegats2
no-otua:naFlooc-otua-taeh:metsyS
gnimmargorpyad7cinortcelE
loocegats1,taehegats1
no-otua:naFlooc-ffo-taeh:metsyS
FIGURE 8
UNIT 24V TERMINAL BOARD
MIS-1373
Manual 2100-218 Page 13
START UP
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil with a dish washing detergent.
CRANKCASE HEATERS
WA421 units are provided with compressor crankcase heat. WA602 and WA482 units are not provided with crankcase heat. These units utilize scroll compressors which do not require crankcase heat in this application.
The WA421 models have an insertion well-type heater located in the lower section of the compressor housing. This is a self-regulating type heater that draws only enough power to maintani the compressor at a safe termperature on these units.
Some form of crankcase heat is essential to prevent liquid refrigerant from migating to the compressor causing oil pump out on compressor start up and possible valve failure due to compressing a liquid.
The decal in Figure 9 is affixed to all WA421 units detailing start up procedure. This is very important. Please read carefully.
HIGH PRESSURE SWITCH
The WA482 and WA602 models are supplied with a remote reset high pressure switch. If tripped, this pressure switch may be reset by turning the themostat off then back on again.
FIGURE 9
STARTING PROCEDURE
IMPORTANT
THESE PROCEDURES MUST BE FOLLOWED A T INITIAL START UP AND AT ANY TIME POWER HAS BEEN REMOVED FOR 12 HOURS OR LONGER.
To prevent compressor damage which may result from the presence of liquid refrigerant in the compressor crankcase.
1. Make certain the room thermostat is in the “off” position (the compressor is not to operate).
2. Apply power by closing the system disconnect switch. This energizes the compressor heater which evaporates the liquid refrigerant in the crankcase.
3. Allow 4 hours or 60 minutes per pound of refrigerant in the system as noted on the unit rating plate, which ever is greater.
4. After properly elapsed time, the thermostat may be set to operate the compressor.
5. Except as required for safety while servicing,
Do not open system disconnect switch.
7961-061
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.
CONDENSER FAN OPERATION
The condenser fan motor on 230/208 volt, one and three phase, 60 HZ units is a two speed motor that comes factory wired on high speed for peak performance. If ambient conditions permit, it can be reconnected to low speed (red wire) for lower sound level. See wiring diagram.
50 HZ models must have fan wired on low speed. These models are factory wired on low speed.
Manual 2100-218 Page 14
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. On a call for heating, circuit R-W1 make at the thermostat pulling in heat contact for the strip heat and blower operation. On a call for second stage heat, R-W2 makes bringing on second heat contactor, if so equipped.
COMPRESSOR CONTROL MODULE
The compressor control module is standard on the WA482 and WA602 models covered by this manual and is optional on the WA421 model. 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.
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.
Manual 2100-218 Page 15
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 2100-218 Page 16
TROUBLESHOOTING
ledoM
detaR wolfriA
DO59
erutarepmeT
DO28
erutarepmeT
124AW004145-2566-46 284AW055165-4576-56 206AW007155-3526-06
FAN BLADE SETTING DIMENSIONS
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
FAN BLADE SETTING
TABLE 5
FAN BLADE DIMENSION
noisnemiD
ledoM
124AW 284AW 206AW
A
57.1
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.
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.
REFRIGERANT CHARGE
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 6.
TABLE 6
REFRIGERANT CHARGE
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.
3. Remove screws holding fan shroud to condenser and bottom. Nine (9) screws.
.P.S.E
0
HnI
2
0.
1.
2.
3.
4.
5.
TABLE 7
INDOOR BLOWER PERFORMANCE
CFM @ 230V
284AW,124AW206AW
V032woLV032hgiHV032woLV032hgiH
lioCyrDlioCteWlioCyrDlioCteWlioCyrDlioCteWlioCyrDlioCteW
0561 0551 0541 0531 0031
---
0061 0051 0041 0031 5711
---
5881 0771 5361 0051 0731 0521
0081 5661 0451 0041 5821 0511
0061 5251
0541 5731
0022 0012 0002 5781 5771 0561
0002 0091 0081 0071 0061 5741
Manual 2100-218 Page 17
TABLE 8
RECOMMENDED AIRFLOW
detaR
ledoM
124AW004103.0511-0061 284AW055102.5821-0571 206AW007103.5731-0591
* Rated CFM and ESP on high speed tap.
*MFC
detaR
*PSE
dednemmoceR
egnaRwolfriA
WK
50A­01A­51A­02A-
00B­90B­51B­81B-
90C­51C-
Values shown are for units equipped with standard 1 inch throwaway filter or 1 inch washable filter. Derate ESP by .15 for 2 inch pleated filters.
TABLE 10
PRESSURE TABLE
TABLE 9
MAXIMUM ESP OF OPERATION
ELECTRIC HEAT ONLY
ledoM124AW284AW206AW
hgiH
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
woL
deepS
05.
05.
05.
54.
05.
05.
05.
05.
05.
05.
hgiH
deepS
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
woL
deepS
deepS
05.
05.
05.
54.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
05.
hgiH
woL
deepS
deepS
05.
05.
05.
04.
05.
05.
05.
05.
05.
05.
COOLING
Air Temperature Entering Outdoor Coil °F
riAnruteR
ledoM
124AW
284AW
206AW
erutarepmeTerusserP5708580959001501011511
BD.ged57
BW.ged26
BD.ged08
BW.ged76
BD.ged58
BW.ged27
BD.ged57
BW.ged26
BD.ged08
BW.ged76
BD.ged58
BW.ged27
BD.ged57
BW.ged26
BD.ged08
BW.ged76
BD.ged58
BW.ged27
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
ediSwoL ediShgiH
86 312
27 812
87 622
37 402
87 012
48 712
332 67
732 48
542
17
47
67
87
08
822
342
952
472
092
67
97
28
48
68
432
942
562
28
58
88
242
852
472
47
67
87
712
232
842
97
18
28
322
832
452
58
78
88
132
742
462
17
27
47
57
742
262
872
87
97
08
352
962
582
58
58
68
162
872
692
182
792
09
29
092
703
97
08
562
482
48
68
272 09
29
282
203
67
77
592
313
18
28
303 78
88
413
333
18
38
503 88
98
313
033
49
69
323 28
38
403
523
78
98
192
213
433
39
59
323
543
87
87
133
38
48
123
043
093
98
09
353
373
48
123
733 09
643 79
143
853 48
843 09
753 79
963 97
153
173
58
183 19
493
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.
NOTE: Pressure table based on high speed condenser fan operation. If condensing pressures appear
Manual 2100-218 Page 18
elevated check condenser fan wiring. See Condenser Fan Operation on Page 14.
TABLE 11
OPTIONAL ACCESSORIES
traP
rebmuNnoitpircseD
5-POB
5-DAFB
5-DAFM
5-VRC
5-MFIE
6-AMC
01-AMC 31-AMC
51-CMC 61-AMC 81-AMC
WA421-A
WA421-B
WA421-C
WA482-A
WA482-B
WA482-C
WA602-A
WA602-B
WA602-C
50A-50AWHE 80A-50AWHE 01A-50AWHE 51A-50AWHE
90B-50AWHE 51B-50AWHE 81B-50AWHE
50C-50AWHE 51C-50AWHE
B5A-VREW B5C-VREW
tiKtratS
B50-BCMW
C10-DCMW A80-BCMW A90-BCMW B70-BCMW
segakcaPretaeH segakcaPretaeH segakcaPretaeH segakcaPretaeH
segakcaPretaeH segakcaPretaeH segakcaPretaeH
segakcaPretaeH segakcaPretaeH
etalPffOknalB
repmaDriAhserFcirtemoraB
repmaDriAhserFdezirotoM
tsuahxEhtiwrotalitneVlaicremmoC
tsuahxEhtiwrezimonocE
rotalitneVyrevoceRygrenE rotalitneVyrevoceRygrenE
)CAL(lortnoCtneibmAwoL
RDT+CPH+CPL
CAL+RDT+CPH+CPL
lortnoCeusserPwoL
CAL+CPL
tiKrekaerBtiucriC
tiKtcennocsiDlluP rekaerBtiucriC rekaerBtiucriC rekaerBtiucriC
X X X X
X X X
X X X
XXX
XXX
X
X X X
X X
X
X
X
X
X
X
X
X
X
X
X
X
XX
X
X
X X X X
X X X
X
X
X
X
X
X
X
X
X
X
X
X
XX XX
X XXXXXXXXXXX
X
X
X X X X
X X X
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X X
X X X
X X
X
X
Manual 2100-218 Page 19
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