Bard T24H 1, 1D, T30H 1, 1D, T36H 1, 1D, T42H 1, 1D, T48H 1, 1D, T60H 1, 1D wall mounted heat pump Installation instructions
Below you will find brief information for T24H1, T30H1, T36H1, T42H1, T48H1, T60H1. These wall mounted heat pumps are designed for use with or without duct work, and the included flanges allow for easy attachment of supply and return ducts. The units are also equipped with a 1-inch throwaway filter that can be serviced from the outside by removing the filter access panel.
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INSTALLATION INSTRUCTIONS
WALL MOUNTED
PACKAGE HEAT PUMPS
Standard & Dehumidification
T24H1
T30H1
T36H1
T42H1
T48H1
T60H1
MODELS
T24H1D
T30H1D
T36H1D
T42H1D
T48H1D
T60H1D
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914...Moving ahead just as planned.
Manual : 2100-541
Supersedes: NEW
File: Volume III Tab 17
Date: 01-13-11
Manual
Page
2100-541
1 of 28
Contents
Getting Other Information and Publications 3
Wall Mount General Information
Wall Mount Model Nomenclature ............................ 4
Shipping Damage .................................................... 4
General ................................................................ 4
Duct Work ................................................................ 5
Filters ................................................................ 5
Fresh Air Intake ....................................................... 5
Condensate Drain .................................................... 5
Installation Instructions
Wall Mounting Information ....................................... 6
Mounting the Unit .................................................... 6
Placement ................................................................ 6
Clearances Required ............................................... 6
Minimum Clearances ............................................... 6
Wiring – Main Power ............................................. 13
Wiring – Low Voltage Wiring ................................. 13
Optional Outdoor T-Stat Applications ..................... 14
Start Up
General .............................................................. 16
Topping Off System Charge ................................... 16
Safety Practices ..................................................... 16
Important Installer Note ......................................... 17
High & Low Pressure Switch ................................. 17
Three Phase Scroll Compressor ............................ 17
Phase Monitor ....................................................... 17
Service Hints ......................................................... 17
Sequence of Operation .......................................... 18
Pressure Service Ports .......................................... 18
Defrost Cycle ......................................................... 18
Troubleshooting
Solid State Heat Pump Control .............................. 20
Checking Temperature Sensor .............................. 21
Fan Blade Setting Dimensions .............................. 22
Removal of Fan Shroud ......................................... 22
R-410A Refrigerant Charge ................................... 22
Troubleshooting GE ECM Motors .......................... 27
Troubleshooting GE ECM Motors .......................... 28
Figures
Figure 1 Fresh Air Damper Assembly ................... 5
Figure 2 Unit Dimensions ...................................... 7
Figure 3A Mounting Instructions T24 & 30 .............. 8
Figure 3B Mounting Instructions T36, 42, 48 ........... 9
Figure 4 Electric Heat Clearance ........................ 10
Figure 5 Wall Mounting Instructions ..................... 11
Figure 6 Wall Mounting Instructions ..................... 11
Figure 7 Common Wall Mounting Installations .... 12
Figure 8 Compressor Cutoff ................................ 14
Figure 9 Compressor Cutoff ................................ 14
Figure 10 Electric Heat Hold-Off Wiring ................ 15
Figure 11 Electric Heat Hold-Off Wiring ................ 15
Figure 12 Defrost Control Board ........................... 19
Figure 13 Fan Blade Setting ................................. 22
Figure 14 Control Disassembly ............................. 28
Figure 15 Winding Test ......................................... 28
Figure 16 Drip Loop .............................................. 28
Tables
Table 1 Clearances Required .............................. 6
Table 2 Min. Clearances Required ...................... 6
Table 3 Troubleshooting .................................... 20
Table Temperature F vs. Resistance .............. 21
Table 4 Fan Blade Dimension ............................ 22
Table 5A Refrig. Charge/Superheat-Subcooling .. 22
Table 5B Refrig. Charge/Subcooling-Subcooling . 22
Table 6A Cooling Pressure .................................. 23
Table 6B Heating Pressure .................................. 23
Table 7A Electrical Specifications T**H ................ 24
Table 7B Electrical Specifications T**H Dehum. .. 25
Table 8 Indoor Blower Performance .................. 26
Manual 2100-541
Page 2 of 28
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
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
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
ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: (212) 642-4900
Fax: (212) 302-1286
Duct Design for Residential .............. ACCA Manual D
Winter and Summer Air Conditioning and Equipment
Selection
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
Manual 2100-541
Page 3 of 28
WALL MOUNT GENERAL INFORMATION
HEAT PUMP WALL MOUNT MODEL NOMENCLATURE
X T
MODEL NUMBER
CAPACITY |
24 - 2 Ton
30 - 2½ Ton
36 - 3 Ton
42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton
36 H
H - Heat Pump
1
REVISIONS
–
VOLTS & PHASE
A - 230/208/60/1
B - 230/208/60/3
C - 460/60/3
A 10
KW
1
0Z - 0KW
04 - 4KW
05 - 5KW
06 - 6KW
F8 - 8KW
S8 - 8KW
09 - 9KW
10 -10KW
15 -15KW
20 -20KW
VENTILATION OPTIONS
X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate
M - Motorized Fresh Air Damper
C - Commercial Ventilator - Mod. Spring Return w/Exhaust
V - Commercial Ventilator - Spring Return w/Exhaust
P - Commercial Ventilator - Power Return w/Exhaust
E - Economizer (Internal) - Fully Modulating with Exhaust
R - Energy Recovery Ventilator - Motorized with Exhaust
(See Spec. Sheet S3398)
X X X X A
CONTROL MODULES
(See Spec. Sheet S3436)
COLOR OPTIONS
X - Beige
1 - White
4 - Buckeye Gray
5 - Desert Brown
8 - Dark Bronze
A - Aluminum
S - Stainless Steel
COIL OPTIONS
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator and Condenser
OUTLET OPTIONS
X - Front (Standard)
FILTER OPTIONS
X - 1-Inch Fiberglass (MERV 2)
M - 2-Inch Pleated (MERV 11)
H - 2-Inch Pleated (MERV 8)
P - 2-Inch Pleated (MERV 6)
E - 24V 1" Electrostatic Air Cleaner
NOTE: Vent options X, B and M are without exhaust capability. May require separate field supplied barometric relief in building.
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 3 for information on codes and standards.
Size of unit for a proposed installation should be based on heat loss/gain 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.
Manual 2100-541
Page 4 of 28
DUCT WORK
All duct work, supply and return, must be properly sized for the design airflow 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.
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 3A, 3B 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.
FILTERS
A 1-inch throwaway filter is standard with each unit.
The filter slides into position making it easy to service.
This filter can be serviced from the outside by removing the filter access panel. A 1-inch washable filter and 2inch pleated filter are also available as optional accessories. The internal filter brackets are adjustable to accommodate the 2-inch filter by bending two (2) tabs down on each side of the filter support bracket.
FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in the service door.
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 the damper to operate, the maximum and minimum blade position stops must be installed. See
Figure 1.
All capacity, efficiency and cost of operation information 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.
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.
FIGURE 1
FRESH AIR DAMPER
Manual 2100-541
Page 5 of 28
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 3.
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, attached to skid for shipping, 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. However, it is generally recommended that a 1-inch clearance is used for ease of installation and maintaining the required clearance to combustible material. See
Figure 3 for details on opening sizes.
3. Locate and mark lag bolt locations and bottom mounting bracket location. See Figures 3A & 3B.
4. Mount bottom mounting bracket.
5. Hook top rain flashing, attached to front - right of supply flange for shipping, under back bend of top.
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 Figures 3A & 3B.
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.
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.
PLACEMENT
1. 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.
2. Care should be taken to ensure that the recirculation and obstruction of condenser discharge air does not occur. Recirculation of condenser discharge air can be from either a single unit or multiple units. Any object such as shrubbery, a building or a large object can cause obstructions to the condenser discharge air. Recirculation or reduced airflow caused by obstructions will result in reduced capacity, possible unit pressure safety lockouts and reduced unit service life.
Units with a blow through condenser, such as the
T**H 10 EER units, it is recommended that a minimum distance of 15 feet between the front of the unit and any barrier or 20 feet between the fronts of two opposing (facing) units.
C l e a n d a r a
A n c e s d e q u a
R t e e q u i r e d f o r
C o n d e n s e r
S e r v i c e
A i r f l o w
A c c e s s
M O D E L S L E F T S I D E R I G H T S I D E
T 2 4 H , T 3 0 H
T 3 6 H , T 4 2 H , T 4 8 H , T 6 0 H
1 5 "
2 0 "
2 0 "
2 0 "
M i n i m u
C o m b u m s t i
C l e a r a n c e s b l e
R
M a t e r i a l s e q u i r e d t o
M O D E L S
T 2 4 H , T 3 0 H
T 3 6 H , T 4 2 H , T 4 8 H , T 6 0 H
F
S U
I R
P P
S T
L Y A I R
T H R E E
D U C T
F E E T
1 / 4 "
1 / 4 "
C A B I N E T
0 "
0 "
Manual 2100-541
Page 6 of 28
FIGURE 2
D i m e n s i o n s o f B a s i c U n i t f o r A r c h i t e c t u r a l a n d I n s t a l l a t i o n R e q u i r e m e n t s ( N o m i n a l )
M O D E L
W I D T H
( W )
D E P T H
( D )
H E I G H T
( H )
S U P P L Y
A B
T 2 4 H
T 3 0 H
T 3 6 H
T 4 2 H
T 4 8 H
T 6 0 H
3 8 .
2 0 0
4 2 .
0 7 5
4 2 .
0 7 5
1 7 .
1 2 5
2 2 .
4 3 2
2 2 .
4 3 2
7 0 .
5 6 3
8 4 .
8 7 5
9 3 .
0 0 0
R E
C
T U R N
B E F G I J K L M N O P
7 .
8 8 2 7 .
8 8 1 3 .
8 8 2 7 .
8 8 4 0 .
0 0 1 0 .
8 8 2 5 .
7 5 1 7 .
9 3 2 6 .
7 5 2 8 .
7 5 2 9 .
2 5 2 7 .
0 0 2 .
6 3 3 9 .
1 3 2 2 .
7 5
Q
9 .
1 4
R S T
5 .
0 0 1 2 .
0 0 5 .
0 0
9 .
8 8 2 9 .
8 8 1 5 .
8 8 2 9 .
8 8 4 3 .
8 8 1 3 .
5 6 3 1 .
6 6 3 0 .
0 0 3 2 .
6 8 2 6 .
9 4 3 4 .
6 9 3 2 .
4 3 3 .
3 7 4 3 .
0 0 2 3 .
8 8 1 0 .
0 0 1 .
4 4 1 6 .
0 0 1 .
8 8
9 .
8 8 2 9 .
8 8 1 5 .
8 8 2 9 .
8 8 4 3 .
8 8 1 3 .
5 6 3 7 .
0 0 3 0 .
0 0 4 0 .
8 1 3 5 .
0 6 4 2 .
8 1 4 0 .
5 6 3 .
3 7 4 3 .
0 0 3 1 .
0 0 1 0 .
0 0 1 .
4 4 1 6 .
0 0 1 0 .
0 0
All dimensions are in inches. Dimensional drawings are not to scale.
5.75
F
G
T**H
RIGHT UNIT
W
Front View
Built In
Rain Hood
4° Pitch
Heater
Access
Panel
Electric
Heat
C. Breaker/
Disconnect
Access Panel
(Lockable)
Filter Access
Panel
Vent Option
Door
Ventilation
Air
Low Voltage
Electrical
Entrance
High Voltage
Electrical
Entrance
D
2.13
A
Side Wall
Mounting
Brackets
(Built In)
I
Top Rain
Flashing
Shipping
Location
C H
Optional
Electrical
Entrances
E
O
Supply Air Opening
B
Return Air Opening
.44
R
S
S
S
S
1
Side View
J
K
L
M
P
Drain
N
Q
S
1
Back View
T
Bottom Installation
Bracket
MIS-2729
Manual 2100-541
Page 7 of 28
Manual 2100-541
Page 8 of 28
Manual 2100-541
Page 9 of 28
FIGURE 4
ELECTRIC HEAT CLEARANCE
Manual 2100-541
Page 10 of 28
SIDE SECTION VIEW OF SUPPLY AIR DUCT FOR
WALL MOUNTED UNIT SHOWING 1/4 INCH
CLEARANCE TO COMBUSTIBLE SURFACES.
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.
FIGURE 5
WALL MOUNTING INSTRUCTIONS
SEE FIGURE 3 – MOUNTING INSTRUCTIONS
FACTORY SUPPLIED
RAIN FLASHING.
MOUNT ON UNIT
BEFORE INSTALLATION
WALL STRUCTURE
SUPPLY AIR
OPENING
SUPPLY AIR
OPENING
SUPPLY AIR
DUCT
RETURN AIR
OPENING
RETURN AIR
OPENING
RETURN AIR
OPENING
WOOD OR STEEL SIDING
WOOD FRAME WALL INSTALLATION
BOTTOM MOUNTING
BRACKET. MOUNT ON
WALL BEFORE
INSTALLING UNIT.
SIDE VIEW MIS-548 A CONCRETE BLOCK WALL INSTALLATION
MIS-549 B
FIGURE 6
WALL MOUNTING INSTRUCTIONS
SEE UNIT DIMENSIONS, FIGURE 2,
FOR ACTUAL DIMENSIONS.
ATTACH TO TOP
PLATE OF WALL
E + 1.000
B
1.000
1.000" CLEARANCE
ALL AROUND DUCT
SUPPLY DUCT
OPENING
A
INTERIOR FINISHED WALL
OVER FRAME
1.000" CLEARANCE
ALL AROUND DUCT
I
RETURN DUCT
OPENING
C
EXTERIOR FINISH WALL
OVER FRAME
K
2 x 6
FRAMING MATERIAL
2 x 4'S, 2 x 6'S &/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.
Manual 2100-541
Page 11 of 28
FIGURE 7
COMMON WALL MOUNTING INSTALLATIONS
RAIN
FLASHING
OUTSIDE
WALL
RAFTERS
FINISHED CEILING SURFACE
SUPPLY AIR DUCT
W/ GRILLE
RAIN
FLASHING
RETURN AIR
OPENING W/ GRILLE
SUPPLY DUCT MAY BE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAFTERS
SUPPLY AIR DUCT
FINISHED CEILING SURFACE
RETURN AIR
OPENING W/ GRILLE
OUTSIDE
WALL
FREE AIR FLOW
NO DUCT
DUCTED SUPPLY
RETURN AT UNIT
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAIN
FLASHING
RAFTERS
SUPPLY AIR DUCT
RAIN
FLASHING
OUTSIDE
WALL
FINISHED
CEILING SURFACE
WALL SLEEVE
RETURN AIR
SPACE
FALSE WALL
RETURN AIR GRILLE
OUTSIDE
WALL
FALSE WALL INSTALLATION
SUPPLY DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAFTERS
SUPPLY AIR DUCT
LOWERED
CEILING
CLOSET WALL
WALL
SLEEVE
SUPPLY AIR
GRILLE
FINISHED CEILING
SURFACE
RAISED FLOOR
RETURN AIR
RETURN AIR
GRILLE
CLOSET INSTALLATION
MIS-550 B
Manual 2100-541
Page 12 of 28
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 must 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.
See “Start Up” section for important information on three phase scroll compressor start ups.
See Tables 7A & 7B for Electrical Specifications.
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
240
208
RANGE
253 – 216
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).
For wiring size and connections, refer to Wiring Manual
2100-516.
Manual 2100-541
Page 13 of 28
FIGURE 8
COMPRESSOR CUTOFF THERMOSTAT WIRING
4 – 10KW 1 PH – 6 & 9KW 3 PH
FIGURE 9
COMPRESSOR CUTOFF THERMOSTAT WIRING
15 – 20KW 1 PH AND 3 PH
OPTIONAL OUTDOOR THERMOSTAT
APPLICATIONS
Since most equipment at the time of manufacture is not designated for any specific destination of the country and are installed in areas not approaching the lower outdoor temperature range, outdoor thermostats are not factory installed as standard equipment, but are offered as an option. There are also different applications for applying outdoor thermostats. The set point of either type of outdoor thermostat application is variable with geographic region and sizing of the heating equipment to the individual structure. Utilization of the heating
Application Data, and the heat loss calculation of the building are useful in determining the correct set points.
NOTE: The additional LAB (low ambient bypass) relay is required to prevent heater operation during low temperature cooling operation.
OPTIONAL COMPRESSOR CUTOFF
THERMOSTAT (See Figures 8 & 9)
Heat pump compressor operation at outdoor temperatures below 0°F are neither desirable nor advantageous in term of efficiency. An outdoor thermostat can be applied to take the mechanical heating
(compressor) off line, and send the (compressor) signal to energize electric heat in its place (to make electric heat first stage heating). This can also be applied to bank the quantity of available electric heat. For example: A heat pump operates with 10KW second stage heat – once the outdoor thermostat has switched then operates 15KW without the compressor as first stage heat.
Manual 2100-541
Page 14 of 28
ELECTRIC HEAT HOLD-OFF
(See Figures 10 & 11)
In other applications, it is desirable to disable the operation of the electric heat until outdoor temperatures have reached a certain design point. This won't allow the electric heat to come on as second stage heating unless the outdoor temperature is below the set point of the outdoor thermostat. This is done to maximize efficiency by utilizing the heat pump to bring the conditioned space temperature up, rather than cycling on the electric heat due a second stage call for heat from the thermostat on start-up coming off a night set-back condition or someone increasing the thermostat set point. (NOTE: Some programmable thermostats do have a built-in time delay for pulling in second stage heat when coming off set-back conditions.)
FIGURE 10
ELECTRIC HEAT HOLD-OFF WIRING
4 – 10KW 1 PH — 6 & 9KW 3 PH
FIGURE 11
ELECTRIC HEAT HOLD-OFF WIRING
15 – 20KW 1 PH & 3 PH
Manual 2100-541
Page 15 of 28
START UP
THESE UNITS REQUIRE R-410A
REFRIGERANT AND POLYOL
ESTER OIL.
GENERAL:
1. Use separate service equipment to avoid cross contamination of oil and refrigerants.
2. Use recovery equipment rated for R-410A refrigerant.
3. Use manifold gauges rated for R-410A (800 psi/250 psi low).
4. R-410A is a binary blend of HFC-32 and HFC-125.
5. R-410A is nearly azeotropic - similar to R-22 and
R-12. Although nearly azeotropic, charge with liquid refrigerant.
6. R-410A operates at 40-70% higher pressure than
R-22, and systems designed for R-22 cannot withstand this higher pressure.
7. R-410A has an ozone depletion potential of zero, but must be reclaimed due to its global warming potential.
8. R-410A compressors use Polyol Ester oil.
9. Polyol Ester oil is hygroscopic; it will rapidly absorb moisture and strongly hold this moisture in the oil.
10. A liquid line dryer must be used - even a deep vacuum will not separate moisture from the oil.
11. Limit atmospheric exposure to 15 minutes.
12. If compressor removal is necessary, always plug compressor immediately after removal. Purge with small amount of nitrogen when inserting plugs.
TOPPING OFF SYSTEM CHARGE
If a leak has occurred in the system, Bard Manufacturing recommends reclaiming, evacuating (see criteria above), and charging to the nameplate charge. If done correctly, topping off the system charge can be done without problems.
With R-410A, there are no significant changes in the refrigerant composition during multiple leaks and recharges. R-410A refrigerant is close to being an azeotropic blend (it behaves like a pure compound or single component refrigerant). The remaining refrigerant charge, in the system, may be used after leaks have occurred and then “top-off” the charge by utilizing the charging charts on the inner control panel cover as a guideline.
REMEMBER: When adding R-410A refrigerant, it must come out of the charging cylinder/tank as a liquid to avoid any fractionation, and to insure optimal system performance. Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction.
WARNING
Failure to conform to these practices could lead to damage, injury or death.
SAFETY PRACTICES:
1. Never mix R-410A with other refrigerants.
2. Use gloves and safety glasses, Polyol Ester oils can be irritating to the skin, and liquid refrigerant will freeze the skin.
3. Never use air and R-410A to leak check; the mixture may become flammable.
4. Do not inhale R-410A – the vapor attacks the nervous system, creating dizziness, loss of coordination and slurred speech. Cardiac irregularities, unconsciousness and ultimate death can result from breathing this concentration.
5. Do not burn R-410A. This decomposition produces hazardous vapors. Evacuate the area if exposed.
6. Use only cylinders rated DOT4BA/4BW 400.
7. Never fill cylinders over 80% of total capacity.
8. Store cylinders in a cool area, out of direct sunlight.
9. Never heat cylinders above 125°F.
10. Never trap liquid R-410A in manifold sets, gauge lines or cylinders. R-410A expands significantly at warmer temperatures. Once a cylinder or line is full of liquid, any further rise in temperature will cause it to burst.
Manual 2100-541
Page 16 of 28
START UP (Continued)
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil with a dish washing detergent.
HIGH & LOW PRESSURE SWITCH
All T**H wall mounted air conditioner series models are supplied with a remote reset for the high and low 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 ZP 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.
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.
SERVICE HINTS
1. Caution owner/operator to maintain clean air filters at all times. Also, not to needlessly close off supply and return air registers. This reduces airflow through the system, which shortens equipment service life as well as increasing operating costs.
2. Check all power fuses or circuit breakers to be sure they are the correct rating.
3. Periodic cleaning of the outdoor coil to permit full and unrestricted airflow circulation is essential.
Manual 2100-541
Page 17 of 28
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 for constant air circulation.
HEATING – A 24V solenoid coil on reversing valve controls heating cycle operation. Two thermostat options, one allowing “Auto” changeover from cycle to cycle and the other constantly energizing solenoid coil during heating season, and thus eliminating pressure equalization noise except during defrost, are to be used. On “Auto” option a circuit is completed from R-B and R-Y on each heating “on” cycle, energizing reversing valve solenoid and pulling in compressor contactor starting compressor and outdoor motor. R-G also make starting indoor blower motor. Heat pump heating cycle now in operation. The second option has no “Auto” changeover position, but instead energizes the reversing valve solenoid constantly whenever the system switch on subbase is placed in “Heat” position, the “B” terminal being constantly energized from R. A Thermostat demand for heat completes R-Y circuit, pulling in compressor contactor starting compressor and outdoor motor. R-G also make starting indoor blower motor.
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all units so that the system operating pressures can be observed.
Pressure tables 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. See Tables 6A & 6B.
DEFROST CYCLE
The defrost cycle is controlled by temperature and time on the solid state heat pump control. See Figure 12.
When the outdoor temperature is in the lower 40°F temperature range or colder, the outdoor coil temperature is
32°F or below. This coil temperature is sensed by the coil temperature sensor mounted near the bottom of the outdoor coil. Once coil temperature reaches 30°F or below, the coil temperature sensor sends a signal to the control logic of the heat pump control and the defrost timer will start.
After 60 minutes at 30°F or below, the heat pump control will place the system in the defrost mode.
During the defrost mode, the refrigerant cycle switches back to the cooling cycle, the outdoor motor stops, electric heaters are energized, and hot gas passing through the outdoor coil melts any accumulated frost. When the temperature rises to approximately 57°F, the coil temperature sensor will send a signal to the heat pump control which will return the system to heating operations automatically.
If some abnormal or temporary condition such as a high wind causes the heat pump to have a prolonged defrost cycle, the heat pump control will restore the system to heating operation automatically after 10 minutes.
Manual 2100-541
Page 18 of 28
The heat pump defrost control board (HPC) has an option of
30, 60 or 90-minute setting. All models are shipped from the factory on the 60-minute pin. If special circumstances require a change to another time, remove the wire from the
60-minute terminal and reconnect to the desired terminal.
The manufacturer’s recommendation is for 60-minute defrost cycles. Refer to Figure 12.
There is a cycle speed up jumper on the control. This can be used to reduce the time between defrost cycle operation without waiting for time to elapse.
Use a small screwdriver or other metallic object, or another
¼ inch QC, to short between the SPEEDUP terminals to accelerate the HPC timer and initiate defrost.
Be careful not to touch any other terminals with the instrument used to short the SPEEDUP terminals. It may take up to 10 seconds with the SPEEDUP terminals shorted for the speedup to be completed and the defrost cycle to start.
As soon as the defrost cycle kicks in remove the shorting instrument from the SPEEDUP terminals. Otherwise the timing will remain accelerated and run through the 1-minute minimum defrost length sequence in a matter of seconds and will automatically terminate the defrost sequence.
There is an initiate defrost jumper (sen jump) on the control that can be used at any outdoor ambient during the heating cycle to simulate a 0° coil temperature.
This can be used to check defrost operation of the unit without waiting for the outdoor ambient to fall into the defrost region.
By placing a jumper across the SEN JMP terminals (a
¼ inch QC terminal works best) the defrost sensor mounted on the outdoor coil is shunted out and will activate the timing circuit. This permits the defrost cycle to be checked out in warmer weather conditions without the outdoor temperature having to fall into the defrost region.
In order to terminate the defrost test the SEN JMP jumper must be removed. If left in place too long, the compressor could stop due to the high pressure control opening because of high pressure condition created by operating in the cooling mode with outdoor fan off. Pressure will rise fairly fast as there is likely no actual frost on the outdoor coil in this artificial test condition.
There is also a 5-minute compressor time delay function built into the HPC. This is to protect the compressor from short cycling conditions. The board’s LED will have a fast blink rate when in the compressor time delay. In some instances, it is helpful to the service technician to override or speed up this timing period, and shorting out the SPEEDUP terminals for a few seconds can do this.
Low Pressure Switch Bypass Operation - The control has a selectable (SW1) low pressure switch bypass set up to ignore the low pressure switch input during the first (30,
60, 120 or 180 seconds) of “Y” operation.
After this period expires, the control will then monitor the low pressure switch input normally to make sure that the switch is closed during “Y” operation.
FIGURE 12
DEFROST CONTROL BOARD
LOW PRESSURE BYPASS TIMER SWITCH
*(FACTORY SETTING 120 SECONDS)
SW
1
OFF
ON
OFF
ON
SW
2 TIME (SEC)
OFF
OFF
ON
ON
30
60
120*
180
ACCUMULATED DEFROST TIME TIMER
(FACTORY SETTING 60 MIN.)
MIS-2668 A
Manual 2100-541
Page 19 of 28
TROUBLESHOOTING
SOLID STATE HEAT PUMP CONTROL
TROUBLESHOOTING PROCEDURE
1. NOTE: A thorough understanding of the defrost cycle sequence is essential. Review that section earlier in this manual prior to troubleshooting the control. Turn on AC power supply to unit.
2. Turn thermostat blower switch to “fan on” – the indoor blower should start. (If it doesn’t, troubleshoot indoor unit and correct problem.)
3. Turn thermostat blower to “auto” position. Indoor blower should stop. NOTE: Many models have a
1-minute blower time delay on “off” command; wait for this to time-out.
4. Set system switch to “heat” or “cool”. Adjust thermostat to call for heat or cool. The indoor blower, compressor and outdoor fan should start.
NOTE: If there was no power to 24 volt transformer, the compressor and outdoor fan motor will not start for 5 minutes. This is because of the compressor short cycle protection.
CODES
Slow Blink
Fast Blink
1 Blink
2 Blink
3 Blink
FUNCTION
Normal Operation
Compressor Time Delay
Low Pressure Switch Failure
High Pressure Switch Failure
Defrost Mode Active
TABLE 3
TROUBLESHOOTING i
S
t i f
y m
f o
p t o
C o m p r e s s o r n o t o t a
m
w i ll s t a r t ( h e a t i n g c o o il n g )
F a n o u t d o o r m o t o r d o e s n o t r u n
( c o o il n g o r h e e x c e p t d u r i n g a t i n g d e f r o s t )
R e v e r s i n g v a l v e d o e s n o t e n e r g i z e
( h e a t i n g o n l y )
U
( n o r
( h h n t
U n i u t e i o t e a o w d t i w i i e f n d ll n g ll g e n o o r o s t n o r o t n l t n l g y ) o c o s t y ) m e
D e s c r i p t i o n , C h e c k & P o s s i b l e C a u s e s
1 .
C h e c k f o r L E D i l l u m i n a t i o n .
I s t h e r e a n L E D i ll u m i n a t e d o n t h e b o a r d ( lf a s h i n g ) ?
2
I s
.
t
C h e c k f o r e r r o r c o d e s .
h e L E D f l a s h i n g a C o d e ?
3 .
C h
I s t h e r e
e c
2
k
4
f o r p o w e r
v o l t s A C b e
a t b o a r d .
t w e e n R a n d C ?
4 .
C h e c k c o d e s .
W h a t c o d e i s b il n k i n g ?
5 .
C o m p r e s s o
W a i t f o r 5 m i n u t e
r d e l a y a c t i v e .
d e l a y o r j u m p b o a r d ' s " s p e e d u p p i n s " .
s = g o t o S t e p # 1 3 ; N o = g o t o S t e p # 9
C o d e " 1 " , g o t o S t e p # 6 ; C o d e " 2 " , g o t o S t e p # 7 ; F a s t B il n k , g o t o S t e p # 5
C h e c k f o r p r o p e r o p e r a t i o n ; i f s t i ll n e e d e d , g o b a c k t o S t e p # 1 .
6 .
L o w p r e s s u r e f a u l t .
7 .
H i g h p r e s s u r e f a u l t .
C h e c k w i r i n g c i r c u i t a n d u n i t p r e s s u r e s .
C h e c k w i r i n g c i r c u i t a n d u n i t p r e s s u r e s .
8 .
C h e
I s t h e r e
c k
2 4
f o r C o m p r e s s o r i n p u t s i g n a l .
v o l t s A C b e t w e e n Y a n d C ?
9 .
N o p o w e r t o b o a r d .
1 0 .
C h
I s t h e r e
e c
2 4
k
v
f o r C o m p r e s s o r
o l t s A C b e t w e e n
o u t p u t s i g n a l .
C C & C ?
1 1 .
N o " Y " c o m p r e s s o r i n p u t s i g n a l .
T h s s s e s
=
=
= g o u n
= g g i t g o o o e t t t t o o o
S t e p
S t e p
S t e i t h e r o S t e p d o p
# 2 ; N o
# 4 ; N o
# 1 e s
# 1
0 ; N n o t
2 ; N o
=
= g o g o
= g h a v e o = g o
W
t o t o t o
S t e p
S t e p u n i t o t o
h a
S
S
t
t e
&
p
#
#
H
3
8
# 1 v o l t a g e , t e p # 1
o w
1 t
3 h e
t o
t r a
C h e c
n s f o
k /
r m e r
R
i
e
s
p a
b
i r
a d o r t h e u n i t w i r i n g i s i n c o r r e c t .
1
1
.
.
N
F a
H e a t p u m p
M o t o r
b o c o m p r e s s o r
c o n t r o l d e f e c t i v e d e f e c t i v e e s
a r d .
M o t o r c a p a c i t o r d e f e c t i v e
H e a t p u m p c o n t r o l d e f e c t i v e
o u t p u t s i g
R e v e r s i n g v a l v e s o l e n o i d c o i l d e f e c t i v e
T
2
3
e
T e m p m p e e
o
r
u l t y
a r a
" C C "
t t u r u r e s e e n s o n s o r r o o r r h e a h e a t t p p u m p u m p c c o o n t n t
n a l .
r o r o l l d d e e f e c f e c t i v e t i v e .
C h e c k t h e r m o s t a t w i r i n g , i n c o r r e c t p h a s e o f u n i t ( s e e s e c t i o n o n P h a s e u n i t w i r i n g .
M o n i t o r ) , a n d f i n a ll y
C h e c k c o m p r e s s o r c o n t a c t o r f o r p r o p e r o p e r a t i o n a n d f i n a ll y c h e c k c o m p r e s s o r .
R e p l a c e d e f r o s t b o a r d .
C h e c k a c r o s s f a n r e l a y o n h e a t p u m p c o n t r o l .
( C o m N C )
R e p l a c e h e a t p u m p c o n t r o l .
C h e c k f o r o p e n o r s h o r t e d m o t o r w i n d i n g .
R e p l a c e m o t o r .
C
1 .
2 .
h e
C h e c k c k
R e p c
C h e c k a p f o r l a c e a c o c i t
2 4 V o n t r o h e a t l r b e r a t i n t w e c i r c u i p u m p g t
.
e n c o
C h e c k f o r
R V w i r i n t r
C n g .
o l a n d o p e n
B C .
o r s h o r t e d c a p a c i t o r .
R e p l a c e c a p a c i t o r .
C h e c k f o r o p e n o r s h o r t e d c o i l .
R e p l a c e s o l e n o i d c o i l .
D i s c o n n e c t t e m p e r a t u r e s e n s o r f r o m b o a r d a n d j u m p e r a c r o s s " S P E E D U P " t e r m i n a l s a n d " S E N
J M P " t e r m i n a l s .
T h i s
1 .
I f u n i t g o e s t h r o u g h s h o u l d c a u s e d e f r o s t c y c l e , t h e r e p u n i t t o l a c e g o t h r o u g h t e m p e r a t u r e a d e f r o s s e n s o r .
t c y c l e w i t h i n o n e m i n u t e .
2 .
I f u n i t d o e s n o t g o t h r o u g h d e f r o s t c y c l e , r e p l a c e h e a t p u m p c o n t r o l .
J u m p e r a c r o s s " S P E E D U P " t e r m i n a l .
T h i s s h o u l d c a u s e t h e u n i t t o c o m e o u t o f d e f r o s t w i t h i n o n e m i n u t e .
1 .
I f u n i t c o m e s o u t o f
2 .
I f u n i t d o e s n o t c o m d e e f r o s t c y c l e , r e p l a c e o u t o f d e f r o s t c y c l e , t e m p e r a t u r e r e p l a c e h e a s e n s o r .
t p u m p c o n t r o l .
Manual 2100-541
Page 20 of 28
CHECKING TEMPERATURE SENSOR
OUTSIDE UNIT CIRCUIT
1. Disconnect temperature sensor from board and from outdoor coil.
2. Use an ohmmeter and measure the resistance of the sensor. Also use ohmmeter to check for short or open.
3. Check resistance reading to chart of resistance. Use sensor ambient temperature. (Tolerance of part is
± 10%.)
4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the heat pump control.
5. If sensor is out of tolerance, shorted, open or reads very low ohms then it should be replaced.
F
7 .
0
8 .
0
9 .
0
1 0 .
0
1 1 .
0
2 .
0
3 .
0
4 .
0
5 .
0
6 .
0
1 2 .
0
8 .
0
7 .
0
6 .
0
5 .
0
4 .
0
3 .
0
2 .
0
1 .
0
0 .
0
1 .
0
1 8 .
0
1 7 .
0
1 6 .
0
1 5 .
0
1 4 .
0
1 3 .
0
1 2 .
0
1 1 .
0
1 0 .
0
9 .
0
2 5 .
0
2 4 .
0
2 3 .
0
2 2 .
0
2 1 .
0
2 0 .
0
1 9 .
0
R
1 1 0 5 7 5
1 0 7 0 1 0
1 0 3 5 7 4
1 0 0 2 6 0
9 7 0 6 4
9 3 9 8 1
9 1 0 0 8
8 8 1 3 9
8 5 3 7 1
8 2 6 9 9
8 0 1 2 1
7 7 6 3 2
7 5 2 3 0
7 2 9 1 0
7 0 6 7 0
6 8 5 0 7
6 6 4 1 8
6 4 3 9 9
6 2 4 4 9
6 0 5 6 5
5 8 7 4 5
1 9 6 8 7 1
1 9 0 0 9 9
1 8 3 5 8 5
1 7 7 3 1 8
1 7 1 2 8 9
1 6 5 4 8 7
1 5 9 9 0 4
1 5 4 5 2 9
1 4 9 3 5 5
1 4 4 3 7 4
1 3 9 5 7 6
1 3 4 9 5 6
1 3 0 5 0 6
1 2 6 2 1 9
1 2 2 0 8 9
1 1 8 1 0 8
1 1 4 2 7 2
TEMPERATURE F VS. RESISTANCE R OF TEMPERATURE SENSOR
F
7 8 .
0
7 9 .
0
8 0 .
0
8 1 .
0
8 2 .
0
8 3 .
0
8 4 .
0
8 5 .
0
8 6 .
0
8 7 .
0
8 8 .
0
6 8 .
0
6 9 .
0
7 0 .
0
7 1 .
0
7 2 .
0
7 3 .
0
7 4 .
0
7 5 .
0
7 6 .
0
7 7 .
0
5 8 .
0
5 9 .
0
6 0 .
0
6 1 .
0
6 2 .
0
6 3 .
0
6 4 .
0
6 5 .
0
6 6 .
0
6 7 .
0
5 3 .
0
5 2 .
0
5 3 .
0
5 4 .
0
5 5 .
0
5 6 .
0
5 7 .
0
R
2 6 0 9 2
2 5 3 8 3
2 4 6 9 6
2 4 0 3 0
2 3 3 8 4
2 2 7 5 8
2 2 1 5 0
2 1 5 6 1
2 0 9 8 9
2 0 4 3 5
1 9 8 9 6
3 4 5 4 5
3 3 5 7 4
3 2 6 3 4
3 1 7 2 3
3 0 8 4 0
2 9 9 8 6
2 9 1 5 7
2 8 3 5 5
2 7 5 7 7
2 6 8 2 3
5 6 9 8 5
5 5 2 8 4
5 3 6 4 0
5 2 0 5 1
5 0 5 1 4
4 9 0 2 8
4 7 5 9 0
4 6 2 0 0
4 4 8 5 5
4 3 5 5 4
4 2 2 9 5
4 1 0 7 7
3 9 8 9 8
3 8 7 5 7
3 7 6 5 2
3 6 5 8 3
3 5 5 4 8
F
4 0 .
0
4 1 .
0
4 2 .
0
4 3 .
0
4 4 .
0
4 5 .
0
4 6 .
0
4 7 .
0
4 8 .
0
4 9 .
0
5 0 .
0
3 0 .
0
3 1 .
0
3 2 .
0
3 3 .
0
3 4 .
0
3 5 .
0
3 6 .
0
3 7 .
0
3 8 .
0
3 9 .
0
2 0 .
0
2 1 .
0
2 2 .
0
2 3 .
0
2 4 .
0
2 5 .
0
2 6 .
0
2 7 .
0
2 8 .
0
2 9 .
0
1 3 .
0
1 4 .
0
1 5 .
0
1 6 .
0
1 7 .
0
1 8 .
0
1 9 .
0
R
9 7 6 0
9 5 2 6
9 2 9 9
9 0 7 7
8 8 6 2
8 6 5 3
8 4 4 9
8 2 5 0
8 0 5 7
7 8 6 9
7 6 8 6
1 2 4 9 2
1 2 1 8 3
1 1 8 8 3
1 1 5 9 1
1 1 3 0 7
1 1 0 3 1
1 0 7 6 2
1 0 5 0 1
1 0 2 4 7
1 0 0 0 0
1 9 3 7 4
1 8 8 6 7
1 8 3 7 5
1 7 9 8 9
1 7 4 3 4
1 6 9 8 4
1 6 5 4 7
1 6 1 2 2
1 5 7 1 0
1 5 3 1 0
1 4 9 2 1
1 4 5 4 4
1 4 1 7 7
1 3 8 2 0
1 3 4 7 4
1 3 1 3 7
1 2 8 1 0
F
1 1 6 .
0
1 1 7 .
0
1 1 8 .
0
1 1 9 .
0
1 2 0 .
0
1 2 1 .
0
1 2 2 .
0
1 2 3 .
0
1 2 4 .
0
1 0 6 .
0
1 0 7 .
0
1 0 8 .
0
1 0 9 .
0
1 1 0 .
0
1 1 1 .
0
1 1 2 .
0
1 1 3 .
0
1 1 4 .
0
1 1 5 .
0
9 6 .
0
9 7 .
0
9 8 .
0
9 9 .
0
1 0 0 .
0
1 0 1 .
0
1 0 2 .
0
1 0 3 .
0
1 0 4 .
0
1 0 5 .
0
8 9 .
0
9 0 .
0
9 1 .
0
9 2 .
0
9 3 .
0
9 4 .
0
9 5 .
0
R
4 0 9 3
4 0 0 6
3 9 2 1
3 8 3 8
3 7 5 7
3 6 7 8
3 6 0 1
3 5 2 6
3 4 5 2
5 0 9 4
4 9 8 2
4 8 7 3
4 7 6 7
4 6 6 3
4 5 6 2
4 4 6 4
4 3 6 7
4 2 7 4
4 1 8 2
6 3 8 3
6 2 3 9
6 0 9 8
5 9 6 1
5 8 2 7
5 6 9 7
5 5 7 0
5 4 4 6
5 3 2 6
5 2 0 8
7 5 0 7
7 3 3 4
7 1 6 5
7 0 0 0
6 8 4 0
6 6 8 3
6 5 3 1
Manual 2100-541
Page 21 of 28
TROUBLESHOOTING
FAN BLADE SETTING DIMENSIONS
Shown in Figure 13 is the correct fan blade setting for proper air delivery across the outdoor coil. Refer to
Table 4 for unit specific dimension.
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 13
FAN BLADE SETTING
R-410A
REFRIGERANT CHARGE
The correct system R-410A charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge shown on the unit serial plate.
If correct charge is in doubt, recover the refrigerant and recharge per the charge on the unit rating plate. See
Table 5 for proper subcooling or superheat levels for evaluation of proper charge.
AIRFLOW
MIS-1724
"A"
TABLE 5A
REFRIGERANT CHARGE
S U P E R H E A T
C O O L I N G
S U B C O O L I N G
H E A T I N G
M o d e l
R a t e d
A i r f l o w
9 5 ° F O D
T e m p e r a t u r e
8 0 ° F O D
T e m p e r a t u r e
4 7 ° F O D
T e m p e r a t u r e
3 5 ° F O D
T e m p e r a t u r e
T 2 4 H
T 3 0 H
T 3 6 H
T 4 2 H
T 4 8 H
T 6 0 H
8 0 0
9 0 0
1 1 0 0
1 2 5 0
1 5 5 0
1 6 5 0
1 2 1 5
1 1 1 4
1 0 1 4
1 0 1 4
1 4 1 8
1 4 1 8
1 5 1 9
1 4 1 8
1 2 1 5
1 4 1 7
1 0 1 3
1 8 2 1
1 6 1 9
1 5 1 8
1 1 1 4
1 9 2 2
TABLE 4
FAN BLADE DIMENSION
D i m e n s i o n A M o d e l
T 2 4
H
T 3 0 H
T 3 6
H
T 4 2 H
T 4 8
H
T 6 0
H
1 .
2 5 "
1 .
7 5 "
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.
TABLE 5B
REFRIGERANT CHARGE
S U B C O O L I N G
C O O L I N G
S U B C O O L I N G
H E A T I N G
M o d e l
R a t e d
A i r f l o w
9 5 ° F O D
T e m p e r a t u r e
8 0 ° F O D
T e m p e r a t u r e
4 7 ° F O D
T e m p e r a t u r e
1 7 ° F O D
T e m p e r a t u r e
T 2 4 H 1 D
T 3 0 H 1 D
T 3 6 H 1 D
T 4 2 H 1 D
T 4 8 H 1 D
T 6 0 H 1 D
8 0 0
9 0 0
1 1 0 0
1 2 5 0
1 5 5 0
1 6 5 0
1 8 2 1
1 2 1 5
8 1 0
1 4 1 7
1 3 1 6
9 1 1
1 3 1 6
8 1 0
1 2 1 5
1 6 1 9
1 1 1 4
1 4 1 7
Manual 2100-541
Page 22 of 28
TABLE 6A
COOLING PRESSURE TABLE
Air Temperature Entering Outdoor Coil °F
M o d e l
T 2 4 H
T 3 0 H
T 3 6 H
T 4 2 H
T 4 8 H
T 6 0 H
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
P r e s s u r e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
7 5
6 2 d e g .
d e g .
D B
W B
8 0
6 7 d e g .
d e g .
D B
W B
8 5
7 2 d e g .
d e g .
D B
W B
7 5
6 2 d e g .
d e g .
D B
W B
8 0
6 7 d e g .
d e g .
D B
W B
8 5
7 2 d e g .
d e g .
D B
W B
7 5
6 2 d e g .
d e g .
D B
W B
8 0
6 7 d e g .
d e g .
D B
W B
8 5
7 2 d e g .
d e g .
D B
W B
7 5
6 2 d e g .
d e g .
D B
W B
8 0
6 7 d e g .
d e g .
D B
W B
8 5
7 2 d e g .
d e g .
D B
W B
R e t u r n A i r
T e m p e r a t u r e
7 5
6 2 d e g .
d e g .
D B
W B
8 0
6 7 d e g .
d e g .
D B
W B
8 5
7 2 d e g .
d e g .
D B
W B
7 5
6 2 d e g .
d e g .
D B
W B
8 0
6 7 d e g .
d e g .
D B
W B
8 5
7 2 d e g .
d e g .
D B
W B
1 1 5
1 4 5
4 8 0
1 5 5
4 9 2
1 6 0
5 0 9
1 4 0
4 9 5
1 5 0
5 0 8
1 5 5
5 2 6
1 4 7
4 9 2
1 5 7
5 0 5
1 6 2
5 2 3
1 4 6
4 8 9
1 5 6
5 0 2
1 6 1
5 2 0
1 2 0
1 4 7
5 1 0
1 5 7
5 2 3
1 6 2
5 4 1
1 4 1
5 2 5
1 5 1
5 3 8
1 5 6
5 5 7
1 4 9
5 2 7
1 5 9
5 4 0
1 6 5
5 5 9
1 4 9
5 2 0
1 5 9
5 3 3
1 6 5
5 5 2
1 1 0
1 4 3
4 5 1
1 5 3
4 6 3
1 5 8
4 7 9
1 3 9
4 6 8
1 4 9
4 8 0
1 5 4
4 9 7
1 4 5
4 6 1
1 5 5
4 7 3
1 6 0
4 9 0
1 4 4
4 6 1
1 5 4
4 7 3
1 5 9
4 9 0
1 0 5
1 4 2
4 2 5
1 5 2
4 3 6
1 5 7
4 5 1
1 3 7
4 4 2
1 4 7
4 5 3
1 5 2
4 6 9
1 4 3
4 3 2
1 5 3
4 4 3
1 5 8
4 5 9
1 4 2
4 3 5
1 5 2
4 4 6
1 5 7
4 6 2
1 0 0
1 4 0
4 0 0
1 5 0
4 1 0
1 5 5
4 2 4
1 3 7
4 1 7
1 4 6
4 2 8
1 5 1
4 4 3
1 4 1
4 0 6
1 5 1
4 1 6
1 5 6
4 3 1
1 3 9
4 1 0
1 4 9
4 2 1
1 5 4
4 3 6
9 5
1 3 8
3 7 7
1 4 8
3 8 7
1 5 3
4 0 1
1 3 5
3 9 5
1 4 4
4 0 5
1 4 9
4 1 9
1 3 9
3 8 2
1 4 9
3 9 2
1 5 4
4 0 6
1 3 7
3 8 8
1 4 7
3 9 8
1 5 2
4 1 2
9 0
1 3 7
3 5 7
1 4 6
3 6 6
1 5 1
3 7 9
1 3 3
3 7 3
1 4 2
3 8 3
1 4 7
3 9 6
1 3 8
3 6 1
1 4 8
3 7 0
1 5 3
3 8 3
1 3 6
3 6 8
1 4 5
3 7 7
1 5 0
3 9 0
8 5
1 3 5
3 3 7
1 4 4
3 4 6
1 4 9
3 5 8
1 3 1
3 5 4
1 4 0
3 6 3
1 4 5
3 7 6
1 3 7
3 4 2
1 4 6
3 5 1
1 5 1
3 6 3
1 3 4
3 4 8
1 4 3
3 5 7
1 4 8
3 6 9
8 0
1 3 3
3 2 1
1 4 2
3 2 9
1 4 7
3 4 1
1 2 9
3 3 5
1 3 8
3 4 4
1 4 3
3 5 6
1 3 5
3 2 7
1 4 4
3 3 5
1 4 9
3 4 7
1 3 2
3 3 1
1 4 1
3 3 9
1 4 6
3 5 1
7 5
1 3 1
3 0 6
1 4 0
3 1 4
1 4 5
3 2 5
1 2 7
3 1 9
1 3 6
3 2 7
1 4 1
3 3 8
1 3 3
3 1 3
1 4 2
3 2 1
1 4 7
3 3 2
1 3 1
3 1 5
1 4 0
3 2 3
1 4 5
3 3 4
Low side pressure ± 4 PSIG
High side pressure ± 10 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 charge weight.
NOTE: Pressure table based on high speed condenser fan operation. If condensing pressures appear elevated check condenser fan wiring.
See “Condenser Fan Operation”.
TABLE 6B
HEATING PRESSURES – (ALL TEMPERATURES °F)
M o d e l
R e t u r n A i r
T e m p e r a t u r e
T 2 4 H
T 3 0 H
T 3 6 H
T 4 2 H
T 4 8 H
T 6 0 H
7 0 d e g .
7 0 d e g .
7 0 d e g .
7 0 d e g .
7 0 d e g .
7 0 d e g .
P r e s s u r e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
L o w S i d e
H i g h S i d e
L o w S i d e
H i g h S i d e
L o w
H i g h
S i d e
S i d e
0
3 8
2 6 7
3 4
2 5 9
4 7
2 7 0
4 0
2 9 4
5
4 5
2 7 4
4 2
2 7 1
5 0
2 7 3
4 5
2 9 6
1 0
5 3
2 8 1
5 0
2 8 3
5 4
2 7 6
5 1
2 9 9
1 5
6 0
2 8 9
5 7
2 9 4
5 9
2 8 1
5 7
3 0 5
2 0
6 8
2 9 7
6 5
3 0 5
6 4
2 8 7
6 3
3 1 1
2 5
7 6
3 0 5
7 2
3 1 6
7 0
2 9 4
7 0
3 1 9
3 0
8 4
3 1 3
8 0
3 2 7
7 7
3 0 2
7 8
3 2 9
3 5
9 2
3 2 2
8 7
3 3 8
8 4
3 1 1
8 5
3 4 0
4 0
9 9
3 3 0
9 4
3 4 8
9 3
3 2 2
9 3
3 5 3
4 5
1 0 7
3 3 9
1 0 1
3 5 8
1 0 2
3 3 4
1 0 2
3 6 8
5 0
1 1 6
3 4 9
1 0 8
3 6 8
1 1 2
3 4 7
1 1 0
3 8 4
5 5
1 2 4
3 5 8
1 1 6
3 7 8
1 2 3
3 6 1
1 1 9
4 0 1
6 0
1 3 2
3 6 8
1 2 3
3 8 7
1 3 4
3 7 6
1 2 9
4 2 0
6 5
1 4 0
3 7 8
1 3 0
3 9 6
1 4 6
3 9 2
1 3 9
4 4 1
Manual 2100-541
Page 23 of 28
TABLE 7A
Electrical Specifications — T**H Series
S i n g l e C i r c u i t M u l it p l e C i r c u i t
M o d e l s
R a t e d
V o l t s , H Z a n d P h a s e
N o .
o f
F i e l d
P o w e r
C i r c u i t s
M i n i m u m
C i r c u i t
A m p a c i t y
1
M a x i m u m
E x t e r n a l F u s e o r
B r e
C i r c u i t a k e r
2
F i e l d
P o w e r
W i r e
3
S i z e
G r o u n d
W i r e
3
S i z e
M i n .
C i r c u i t
A m p a c i t y
1
M a x .
C i r c u i t
E x t e r i o r F u s e
C r t .
o r
B k r .
2
F i e l d
W i r e
P o w e r
S i z e
3
W i
G r o u n d r e S i z e
3
C k t .
A C k t .
B C k t .
A C k t .
B C k t .
A C k t .
B C k t .
A C k t .
B
A 0 5
A 0 8
A 1 0
5
A 1 5
T 4 2 H 1 B 0 0 , B 0 Z
B 0 6
B 0 9
6
B 1 5
T 4 2 H 1 C 0 Z
C 0 6
C 0 9
6
C 1 5
T 4 8 H 1 A 0 0 , A 0 Z
A 0 5
A 0 8
A 1 0
5
A 1 5
T 4 8 H 1 B 0 0 , B 0 Z
B 0 6
B 0 9
6
B 1 5
T 4 8 H 1 C 0 Z
C 0 6
C 0 9
6
C 1 5
T 6 0 H 1 A 0 0 , A 0 Z
A 0 5
A 1 0
5
A 1 5
5
A 2 0
T 6 0 H 1 B 0 0 , B 0 Z
T 2 4 H 1 A 0 0 , A 0 Z
A 0 4
4
A S 8
7
A F 8
T 2 4 H 1 B 0 0 , B 0 Z
B 0 6
B 0 9
T 2 4 H 1 C 0 Z
C 0 6
C 0 9
T 3 0 H 1 A 0 0 , A 0 Z
A 0 4
4
A S 8
7
A F 8
T 3 0 H 1 B 0 0 , B 0 Z
B 0 6
B 0 9
T 3 0 H 1 C 0 Z
C 0 6
C 0 9
T 3 6 H 1 A 0 0 , A 0 Z
A 0 5
A 0 8
A 1 0
5
A 1 5
T 3 6 H 1 B 0 0 , B 0 Z
B 0 6
B 0 9
6
B 1 5
T 3 6 H 1 C 0 Z
C 0 6
C 0 9
6
C 1 5
T 4 2 H 1 A 0 0 , A 0 Z
2 3 0 / 2 0 8 6 0 1
1
1
1
2 4
4 5
4 8
3 5
5 0
5 0
8
8
8
1 0
1 0
1 0
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
3 0
4 0
6 0
8 0
9 0
9 0
3 5
5 0
6 0
6 0
1 5
2 5
3 0
3 0
3 0
4 5
5 0
6 0
1 5
2 5
3 0
5 0
7 0
2 5
4 0
2 0
2 5
3 5
5 0
7 0
2 0
3 5
4 5
1 5
4 5
1 5
2 0
2 5
4 0
6 0
7 0
9 0
9 0
2 7
3 1
5 7
7 3
8 3
8 6
2 6
4 4
5 3
5 3
1 3
2 2
2 6
2 7
5 2
1 2
2 1
2 6
8 1
8 5
2 1
3 9
4 8
1 8
2 3
2 4
4 5
4 8
6 6
1 8
6 5
1 6
3 4
4 2
9
2 4
2 9
5 5
7 0
3 6
4 5
1 0
1 9
1
1
1 o r 2
1
1 o r 2 o r 2
1 o r 2
1
1
1
1
1
1
1
1
1
1
1
1
1
1 o r 2
1 o r 2
1 o r 2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1 o r 2
1 o r 2
1
1
1
1
1 o r 2
1 o r 3
1
1
1
1 o r 2
1
1 o r 2 o r 2
1 o r 2
1
1
1
1 0
8
6
4
8
1 4
1 2
4
4
1 0
8
6
6
1 4
8
6
4
4
1 0
1 0
1 0
6
1 2
1 0
1 0
1 0
3
8
8
6
8
4
1 0
8
1 2
1 0
8
8
6
1 2
8
8
1 4
1 0
1 0
1 0
8
8
8
1 0
1 0
1 0
1 0
1 2
1 0
1 0
1 0
1 0
1 4
1 0
1 0
1 0
1 0
1 0
1 0
8
1 0
1 0
1 2
1 0
1 0
1 0
8
1 2
1 0
1 0
1 4
1 0
1 0
1 0
8
1 0
1 4
1 2
8
8
2 4
2 4
2 9
2 9
3 3
3 1
3 1
3 4
4 2
4 2
4 2
5 2
5 2
4 2
5 2
5 2
3 5
3 5
4 0
4 0
4 0
4 0
4 0
4 0
4 5
4 5
4 5
6 0
6 0
4 5
6 0
6 0
8
8
8
8
8
8
8
8
8
8
8
6
6
8
6
6
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
B 0 9
6
B 1 5
T 6 0 H 1 C 0 Z
2 3 0 / 2 0 8 6 0 3 1
1
1
C 0 9
6
C 1 5
4 6 0 6 0 3
1
1
1 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electrical Code (latest version), Article
310 for power conductor sizing.
Caution: When more than one field power 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 three (3) conductors are in a raceway.
2 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
3 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
4 Maximum KW that can operate with the heat pump on is 4KW. Full heat available during Emergency Heat Mode.
5 Maximum KW that can operate with the heat pump on is 10KW. Full heat available during Emergency Heat Mode.
6 Maximum KW that can operate with the heat pump on is 9KW. Full heat available during Emergency Heat Mode.
7 Maximum KW that can operate with the heat pump on is 8KW. Full heat available during Emergency Heat Mode.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses & conductor wires in accordance w/the Nat'l. Electrical Code & all local codes.
Manual 2100-541
Page 24 of 28
TABLE 7B
Electrical Specifications — T**H Series Dehumidification
S i n g l e C i r c u i t M u l it p l e C i r c u i t
M o d e l s
R a t e d
V o l t s , H Z a n d P h a s e
N o .
o f
F i e l d
P o w e r
C i r c u i t s
M i n i m u m
C i r c u i t
A m p a c i t y
1
M a x i m u m
E x t e r n a l F u s e o
B r r C i r c u i t e a k e r
2
F i e l d
P o w e r
W i r e
3
S i z e
G r o u n d
W i r e
3
S i z e
M i n .
C i r c u i t
A m p a c i t y
1
M a x .
E x t e r
C i r c u i t i o r F u s e
C r t .
o r
B k r .
2
F i e l d
W i r e
P o w e r
S i z e
3
W i
G r o u n d r e S i z e
3
C k t .
A C k t .
B C k t .
A C k t .
B C k t .
A C k t .
B C k t .
A C k t .
B
1
1 o r 2
1
1 o r 2 o r 2
1 o r 2
1
1
1
1
1
1
1
1 o r 2
1 o r 2
1
1
1
1
1
1
1
1
1
1
1
1 o r 2 o r 2
1 o r 2
1 o r 2
1 o r 2
1
1
1
1
1
1
1
1
1
1 o r 2
1
1
1
1
1
1
1
1
1 o r 2
1 o r 2
T 2 4 H 1 D A 0 0 , A 0 Z
D A 0 4
4
7
D A S 8
D A F 8
T 2 4 H 1 D B 0 0 , B 0 Z
D B 0 6
D B 0 9
T 2 4 H 1 D C 0 Z
D C 0 6
D C 0 9
T 3 0 H 1 D A 0 0 , A 0 Z
D A 0 4
4
7
D A S 8
D A F 8
T 3 0 H 1 D B 0 0 , B 0 Z
D B 0 6
D B 0 9
T 3 0 H 1 D C 0 Z
D C 0 6
D C 0 9
T 3 6 H 1 D A 0 0 , A 0 Z
D A 0 5
D A 0 8
D A 1 0
5
D A 1 5
T 3 6 H 1 D B 0 0 , B 0 Z
D B 0 6
D B 0 9
6
D B 1 5
T 3 6 H 1 D C 0 Z
D C 0 6
D C 0 9
6
D C 1 5
T 4 2 H 1 D A 0 0 , A 0 Z
D A 0 5
D A 0 8
D A 1 0
5
D A 1 5
T 4 2 H 1 D B 0 0 , B 0 Z
D B 0 6
D B 0 9
6
D B 1 5
T 4 2 H 1 D C 0 Z
D C 0 6
D C 0 9
6
D C 1 5
T 4 8 H 1 D A 0 0 , A 0 Z
D A 0 5
D A 0 8
D A 1 0
5
D A 1 5
T 4 8 H 1 D B 0 0 , B 0 Z
D B 0 6
D B 0 9
6
D B 1 5
T 4 8 H 1 D C 0 Z
D C 0 6
D C 0 9
6
D C 1 5
T 6 0 H 1 D A 0 0 , A 0 Z
D A 0 5
D A 1 0
5
5
D A 1 5
D A 2 0
T 6 0 H 1 D B 0 0 , B 0 Z
D B 0 9
6
D B 1 5
T 6 0 H 1 D C 0 Z
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
2 3 0 / 2 0 8 6 0 3
4 6 0 6 0 3
2 3 0 / 2 0 8 6 0 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1 8
3 6
4 5
1 0
1 9
2 4
2 9
5 5
7 0
8 1
8 5
2 6
2 7
3 1
5 7
2 1
3 9
4 8
5 2
1 2
2 1
4 4
5 3
5 3
1 3
2 2
2 6
2 7
7 3
8 3
8 6
2 6
1 6
3 4
4 2
9
1 8
2 3
2 4
4 5
4 8
6 6
2 4
4 5
4 8
6 5
8 0
9 0
9 0
3 5
3 0
3 0
4 0
6 0
5 0
6 0
6 0
1 5
2 5
3 0
3 0
5 0
6 0
1 5
2 5
9 0
9 0
3 0
4 5
2 5
4 0
6 0
7 0
2 5
4 0
4 5
1 5
2 0
2 5
3 5
5 0
5 0
7 0
2 0
3 5
4 5
1 5
2 0
3 5
5 0
5 0
7 0
1 0
1 0
1 4
1 0
8
8
1 0
1 0
1 0
1 0
1 0
8
1 0
1 0
1 0
1 4
1 2
1 0
1 0
1 0
1 0
8
8
8
1 0
1 0
1 0
1 0
1 2
1 0
1 0
1 0
6
6
1 4
1 0
4
4
1 0
8
1 0
1 0
1 0
8
6
4
1 0
8
8
1 4
1 2
8
6
6
1 2
1 0
1 0
1 0
4
4
8
6
3
8
1 0
8
8
8
4
1 2
8
8
1 4
1 2
8
6
8
8
1 0
1 0
1 0
1 0
8
1 2
1 0
1 0
1 4
1 2
1 0
1 0
1 0
8 2 4
2 4
2 9
2 9
3 3
3 1
3 1
3 4
4 2
4 2
4 2
5 2
5 2
4 2
5 2
5 2
3 5
3 5
4 0
4 0
4 0
4 0
4 0
4 0
4 5
4 5
4 5
6 0
6 0
4 5
6 0
6 0
8
8
8
8
8
8
8
8
8
8
8
6
6
8
6
6
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
2 3 0 / 2 0 8 6 0 3
1 o r 3
1
1
1
1
D C 0 9 4 6 0 6 0 3 1
6
D C 1 5 1
1 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electrical Code (latest version), Article
310 for power conductor sizing.
Caution: When more than one field power 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 three (3) conductors are in a raceway.
2 Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
3 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.
4 Maximum KW that can operate with the heat pump on is 4KW. Full heat available during Emergency Heat Mode.
5 Maximum KW that can operate with the heat pump on is 10KW. Full heat available during Emergency Heat Mode.
6 Maximum KW that can operate with the heat pump on is 9KW. Full heat available during Emergency Heat Mode.
7 Maximum KW that can operate with the heat pump on is 8KW. Full heat available during Emergency Heat Mode.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses & conductor wires in accordance w/the Nat'l. Electrical Code & all local codes.
Manual 2100-541
Page 25 of 28
TABLE 8
T**H INDOOR BLOWER PERFORMANCE - CFM (0.00" — 0.50" H
2
0)
1
M o d e l
T 2 4 H
T 3 0 H
T 3 6 H
T 4 2 H
T 4 8 H
T 6 0 H
R a t e
.
.
.
.
.
.
d
1
1
1
1
2
2
0
0
5
5
0
0
E S P
M a x
.
.
E
.
5 0
.
5 0
.
5 0
.
5 0
5 0
5 0
S P B l o w
6
7
8
8
e
5
0
0
2
r
0
0
0
5
O n l y C o o
8 0 0
9 0 0
1 1 0 0
1 2 5 0
1 5
1 6
l i n
5 0
5 0
g E l e c t r i
1 0
1 0
1 1
1 2
1
1
5
6
c H
0 0
0 0
0 0
5 0
5
5
0
0
e a t
NOTE: These units are equipped with a variable speed (ECM) indoor motor that automatically adjusts itself to maintain approximately the same rate of indoor airflow in both heating & cooling, dry & wet coil conditions and at both 230/208 or 460 volts.
1 Maximum ESP (inches WC) shown is with 2" thick disposable filter.
2 Blower only CFM is the total air being circulated during continuous fan mode.
3 CFM output on Cooling or Electric Heat.
Manual 2100-541
Page 26 of 28
TROUBLESHOOTING GE ECM
™
MOTORS
CAUTION:
Disconnect power from unit before removing or replacing connectors, or servicing motor. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor.
Symptom
Motor rocks slightly when starting
Cause/Procedure
• This is normal start-up for ECM
Symptom
• Noisy blower or cabinet
• “Hunts” or “puffs” at
high CFM (speed)
Cause/Procedure
• Check for loose blower housing, panels, etc.
• High static creating high blower speed?
- Check for air whistling through seams in
ducts, cabinets or panels
- Check for cabinet/duct deformation
• Does removing panel or filter reduce
“puffing”?
- Reduce restriction
- Reduce max. airflow
Motor won’t start
• No movement
• Check blower turns by hand
• Check power at motor
• Check low voltage (24 Vac R to C) at motor
• Check low voltage connections
(G, Y, W, R, C) at motor
• Check for unseated pins in connectors on
motor harness
• Test with a temporary jumper between R - G
• Check motor for tight shaft
• Perform motor/control replacement check
• Perform Moisture Check
Evidence of Moisture
• Motor failure or
Check
malfunction has occurred and moisture is present
• Evidence of moisture
present inside air mover
• Replace motor and Perform Moisture
• Perform Moisture Check
• Motor rocks,
but won’t start
Motor oscillates up • It is normal for motor to oscillate with no load & down while being on shaft tested off of blower
Motor starts, but runs erratically
• Varies up and down
or intermittent
• Check for loose or compliant motor mount
• Make sure blower wheel is tight on shaft
• Perform motor/control replacement check
• Check line voltage for variation or “sag”
• Check low voltage connections
(G, Y, W, R, C) at motor, unseated pins in
motor harness connectors
• Check “Bk” for erratic CFM command (in
variable-speed applications)
• Check out system controls, Thermostat
• Perform Moisture Check
Do Don’t
• Check out motor, controls,
• Automatically assume the motor is bad.
wiring and connections
thoroughly before replacing
motor
• Orient connectors down so • Locate connectors above 7 and 4 o’clock
water can’t get in
- Install “drip loops”
positions
• Use authorized motor and • Replace one motor or control model # with
model #’s for replacement another (unless an authorized replacement)
• Keep static pressure to a • Use high pressure drop filters some have ½"
minimum:
H20 drop!
- Recommend high
efficiency, low static filters
• Use restricted returns
- Recommend keeping filters
clean.
- Design ductwork for min.
static, max. comfort
- Look for and recommend
ductwork improvement,
where necessary
• “Hunts” or “puffs” at
high CFM (speed)
• Stays at low CFM
despite system call
for cool or heat CFM
• Stays at high CFM
• Blower won’t shut off
• Size the equipment wisely • Oversize system, then compensate with low
airflow
• Check orientation before • Plug in power connector backwards
inserting motor connectors • Force plugs
Moisture Check
• Connectors are oriented “down” (or as recommended by equipment
manufacturer)
• Arrange harness with “drip loop” under motor
• Is condensate drain plugged?
• Check for low airflow (too much latent capacity)
• Check for undercharged condition
• Check and plug leaks in return ducts, cabinet
Comfort Check
• Check proper airflow settings
• Low static pressure for lowest noise
• Set low continuous-fan CFM
• Use humidistat and 2-speed cooling units
• Use zoning controls designed for ECM that regulate CFM
• Thermostat in bad location?
Excessive noise
• Air noise
• Does removing panel or filter reduce
“puffing”?
- Reduce restriction
- Reduce max airflow
• Check low voltage (Thermostat) wires and
connections
• Verify fan is not in delay mode; wait until
delay complete
• “R” missing/not connected at motor
• Perform motor/control replacement check
• “R” missing/not connected at motor
• Is fan in delay mode? - wait until delay time
complete
• Perform motor/control replacement check
• Current leakage from controls into G, Y or W?
Check for Triac switched thermostat or solid-
state relay
• Determine if it’s air noise, cabinet, duct or
motor noise; interview customer, if necessary
• High static creating high blower speed?
- Is airflow set properly?
- Does removing filter cause blower to slow
down? Check filter
- Use low-pressure drop filter
- Check/correct duct restrictions
Manual 2100-541
Page 27 of 28
TROUBLESHOOTING GE ECM
™
MOTORS CONT’D.
Replacing ECM Control Module
To replace the control module for the GE variable-speed indoor blower motor you need to take the following steps:
1. You MUST have the correct replacement module. The controls are factory programmed for specific operating modes. Even though they look alike, different modules may have completely different functionality.
USING THE WRONG CONTROL MODULE VOIDS ALL PRODUCT
WARRANTIES AND MAY PRODUCE UNEXPECTED RESULTS.
2. Begin by removing AC power from the furnace or air handler being serviced. DO NOT WORK ON THE MOTOR WITH AC POWER
APPLIED. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor.
3. It is usually not necessary to remove the motor from the blower assembly. However, it is recommended that the whole blower assembly, with the motor, be removed from the furnace/air handler. (Follow the manufacturer’s procedures). Unplug the two cable connectors to the motor.
There are latches on each connector. DO NOT PULL ON THE WIRES.
The plugs remove easily when properly released.
4. Locate the two standard ¼" hex head bolts at the rear of the control housing (at the back end of the control opposite the shaft end). Refer to
Figure 14. Remove these two bolts from the motor and control assembly while holding the motor in a way that will prevent the motor or control from falling when the bolts are removed. If an ECM2.0
control is being replaced (recognized by an aluminum casting rather that a deep-drawn black steel can housing the electronics), remove only the hex-head bolts. DO NOT REMOVE THE TORX-HEAD
SCREWS.
5. The control module is now free of mechanical attachment to the motor endshield but is still connected by a plug and three wires inside the control. Carefully rotate the control to gain access to the plug at the control end of the wires. With thumb and forefinger, reach the latch holding the plug to the control and release it by squeezing the latch tab and the opposite side of the connector plug and gently pulling the plug out of the connector socket in the control. DO NOT PULL ON THE
WIRES. GRIP THE PLUG ONLY.
6. The control module is now completely detached from the motor.
Verify with a standard ohmmeter that the resistance from each motor lead (in the motor plug just removed) to the motor shell is >100K ohms.
Refer to Figure 15. (Measure to unpainted motor end plate.) If any motor lead fails this test, do not proceed to install the control module.
THE MOTOR IS DEFECTIVE AND MUST BE REPLACED.
Installing the new control module will cause it to fail also.
7. Verify that the replacement control is correct for your application.
Refer to the manufacturer's authorized replacement list. USING THE
WRONG CONTROL WILL RESULT IN IMPROPER OR NO
BLOWER OPERATION. Orient the control module so that the 3wire motor plug can be inserted into the socket in the control.
Carefully insert the plug and press it into the socket until it latches. A
SLIGHT CLICK WILL BE HEARD WHEN PROPERLY
INSERTED. Finish installing the replacement control per one of the three following paragraphs, 8a, 8b or 8c.
8a. IF REPLACING AN ECM 2.0 CONTROL (control in cast aluminum can with air vents on the back of the can) WITH AN ECM
2.3 CONTROL (control containing black potting for water protection in black deep-drawn steel case with no vents in the bottom of the can), locate the two through-bolts and plastic tab that are packed with the replacement control. Insert the plastic tab into the slot at the perimeter of the open end of the can so that the pin is located on the inside of the perimeter of the can. Rotate the can so that the tab inserts into the tab locator hole in the endshield of the motor. Using the two through-bolts provided with the replacement control, reattach the can to the motor.
THE TWO THROUGH-BOLTS PROVIDED WITH THE
REPLACEMENT ECM 2.3 CONTROL ARE SHORTER THAN
THE BOLTS ORIGINALLY REMOVED FROM THE ECM 2.0
CONTROL AND MUST BE USED IF SECURE ATTACHMENT
OF THE CONTROL TO THE MOTOR IS TO BE ACHIEVED.
DO NOT OVERTIGHTEN THE BOLTS.
8b. IF REPLACING AN ECM 2.3 CONTROL WITH AN ECM
2.3 CONTROL, the plastic tab and shorter through-bolts are not needed.
The control can be oriented in two positions 180° apart. MAKE SURE
THE ORIENTATION YOU SELECT FOR REPLACING THE
CONTROL ASSURES THE CONTROL'S CABLE CONNECTORS
WILL BE LOCATED DOWNWARD IN THE APPLICATION SO
THAT WATER CANNOT RUN DOWN THE CABLES AND INTO
THE CONTROL. Simply orient the new control to the motor's endshield, insert bolts, and tighten. DO NOT OVERTIGHTEN THE
BOLTS.
8c. IF REPLACING AN ECM 2.0 CONTROL WITH AN ECM 2.0
CONTROL (It is recommended that ECM 2.3 controls be used for all replacements), the new control must be attached to the motor using through bolts identical to those removed with the original control. DO
NOT OVERTIGHTEN THE BOLTS.
9. Reinstall the blower/motor assembly into the HVAC equipment.
Follow the manufacturer's suggested procedures.
10. Plug the 16-pin control plug into the motor. The plug is keyed.
Make sure the connector is properly seated and latched.
11. Plug the 5-pin power connector into the motor. Even though the plug is keyed, OBSERVE THE PROPER ORIENTATION. DO NOT
FORCE THE CONNECTOR. It plugs in very easily when properly oriented. REVERSING THIS PLUG WILL CAUSE IMMEDIATE
FAILURE OF THE CONTROL MODULE.
12. Final installation check. Make sure the motor is installed as follows: a. Unit is as far INTO the blower housing as possible.
b.Belly bands are not on the control module or covering vent holes.
c. Motor connectors should be oriented between the 4 o’clock and 8 o’clock positions when the blower is positioned in its final location and orientation.
d.Add a drip loop to the cables so that water cannot enter the motor by draining down the cables. Refer to Figure 16.
The installation is now complete. Reapply the AC power to the HVAC equipment and verify that the new motor control module is working properly. Follow the manufacturer's procedures for disposition of the old control module.
Control Disassembly
Only remove
Hex Head Bolts
Push until
Latch Seats
Over Ramp
From Motor
Circuit
Board
Motor
ECM 2.0
Note:
Use the shorter bolts and alignment pin supplied when replacing an
ECM 2.0 control.
ECM
2.3/2.5
Control Connector
(16-pin)
Power Connector
(5-pin)
Hex-head Screws
Motor Connector
(3-pin)
Motor Connector
(3-pin)
Winding Test
Motor OK when
R > 100k ohm
Back of
Control
Drip Loop
Connector Orientation
Between 4 and 8 o'clock
Drip Loop
Manual 2100-541
Page 28 of 28
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Key features
- Wall mounted design
- Ductless or ducted operation
- 1-inch throwaway filter
- Fresh air intake
- Condensate drain
- Electric heat option
- High and low pressure switch
- Defrost cycle