Bard HA 4S4KA, HA 5S4KA, HL 4S4KA, HL 5S4KA Wall Mounted Packaged Air Conditioner Installation Instructions

INSTALLATION INSTRUCTIONS
WALL-MOUNTED
PACKAGED AIR CONDITIONER
Models:
HA4S4KA HL4S4KA
HA5S4KA HL5S4KA
MIS-2498
MIS-2498
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual:2100-646A
Supersedes:2100-646
Date:12-28-15
Page
1 of 26
CONTENTS
Getting Other Information and Publications
3
Wall Mount General Information.......................... 4
Air Conditioner Wall Mount Model Nomenclature...... 4
Shipping Damage.................................................. 7
General................................................................ 7
Duct Work............................................................ 7
Filters.................................................................. 7
Condensate Drain ................................................. 7
Installation................................................................ 8
Wall Mounting Information..................................... 8
Mounting the Unit................................................. 8
Typical Installations............................................... 8
Wiring – Main Power.............................................. 8
Wiring – Low Voltage Wiring.................................. 12
Dirty Filter Switch and Relay................................ 13
Economizer Fail Time Delay Relay......................... 13
Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Unit Dimensions................................... 5
Mounting Instructions........................... 9
Wall Mounting Instructions.................. 10
Wall Mounting Instructions.................. 10
Common Wall Mounting Installations.... 11
Electric Heat Clearance....................... 12
Start Up Label.................................... 17
Fan Blade Setting............................... 18
Control Disassembly............................ 21
Winding Test....................................... 21
Drip Loop........................................... 21
H***S4 Wiring Diagram – Top.............. 24
H***S4 Wiring Diagram – Bottom......... 25
H***S4 Low Voltage Ladder Diagram
for Unit and MV Connections................ 26
Manual2100-646A
Page
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Start Up.................................................................... 14
General.............................................................. 14
Topping Off System Charge.................................. 14
Safety Practices.................................................. 14
Important Installer Note....................................... 14
Service Hints...................................................... 14
Sequence of Operation......................................... 15
High and Low Pressure Switch.............................. 15
Compressor Control Module.................................. 15
Motor Start Device............................................... 16
Pressure Service Ports......................................... 16
Crankcase Heaters............................................... 17
Service...................................................................... 18
Compressor Solenoid........................................... 18
Fan Blade Setting Dimensions.............................. 18
Removal of Fan Shroud........................................ 18
R-410A Refrigerant Charge.................................. 19
Troubleshooting GE ECMTM Motors........................ 20
Optional Accessories............................................ 21
Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Electric Heat........................................ 4
Dimensions of Basic Unit....................... 5
Electrical Specifications........................ 6
Sequence of Operation........................ 15
Fan Blade Dimensions......................... 18
Cooling Pressure................................. 19
Indoor Blower Performance.................. 22
Optional Accessories – RH Units........... 22
Optional Accessories – LH Units..............22
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help when installing the
furnace. They can usually be found at the local library
or purchased directly from the publisher. Be sure to
consult the current edition of each standard.
National Electrical Code.......................ANSI/NFPA 70
Standard for the Installation of
Air Conditioning and Ventilating
Systems ...........................................ANSI/NFPA 90A
Standard for Warm Air Heating
and Air Conditioning Systems.............ANSI/NFPA 90B
Load Calculation for Residential
Winter and Summer
Air Conditioning...............ACCA Manual J or Manual N
Low Pressure, Low Velocity
Duct System Design for
Winter and Summer
Air Conditioning.............. ACCA Manual D or Manual Q
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
Manual2100-646A
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WALL MOUNT GENERAL INFORMATION
AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE
HA
4S
MODEL NUMBER
HA – Right Hand
HL – Left Hand
CAPACITY
4S – 4 Ton
5S – 5 Ton
4
K
A
05
B
P
X
X
K – Accumulator
VOLTS & PHASE
A – 230/208-1
COIL OPTIONS
X – Standard
1 – Phenolic Coated Evaporator
2 – Phenolic Coated Condenser
3 – Phenolic Coated Evaporator and Condenser
VENTILATION OPTIONS
B – Blank-Off Plate (No Ventilation)
Y – 100% Economizer (Temperature)
Z – 100% Economizer (Enthalpy)
FILTER OPTIONS
P – 2" Pleated MERV 8
OUTLET OPTIONS
X – Front (Standard)
COLOR OPTIONS
X – Beige (Standard)
4 – Buckeye Gray
5 – Desert Brown
8 – Dark Bronze
A – Aluminum
S – Stainless Steel
TABLE 1
Electric Heat Table
Nominal
KW
J
CONTROL MODULES
J – Only
REVISION
KW
0Z– No KW
w/Circuit Breaker or Pull Disconnect
05– 5 KW
08 – 8 KW
10– 10 KW
15– 15 KW
At 240V 
Kw
1-Ph Amps
At 208V 
Btuh
Kw
1-Ph Amps
Btuh
5.0
5.0
20.8
17,065
3.75
18.0
12,799
8.0
8.0
33.3
27,304
6.00
28.8
20,478
10.0
10.0
41.7
34,130
7.50
36.1
25,598
15.0
15.0
62.5
51,195
11.25
54.1
38,396
 These electric heaters are available in 230/208V units only.
See Table 3 for heater availability by model
Manual2100-646A
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X
TABLE 2
Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)
Unit
HA4S4
HL4S4
HA5S4
HL5S4
Width
W
Supply
Depth Height
D
H
A
Return
B
C
B
E
F
G
I
J
K
L
M
N
O
P
Q
R
S1
S2
T
42.075 22.432 94.875 9.88 29.88 15.88 29.88 43.88 19.10 41.66 30.00 42.68 36.94 44.69 42.43 3.37 43.00 33.88 10.00 1.44 16.00 21.00 1.88
All dimensions in inches. Dimensional drawings are not to scale.
FIGURE 1
Unit Dimensions
HA*S4
RIGHT
UNIT
Built In
Rain Hood
4° Pitch
Heater
Access
Panel
W
E
D
O
.44
2.13
Electric
Heat
I
Economizer
Intake Hood
Filter Access Panel
5.75
Vent Option
Door 1
1
Side Wall
Mounting
Brackets
(Built In)
A
C. Breaker/
Disconnect
Access Panel
(Lockable)
C
Cond.
Air
Inlet
High Voltage
Electrical
Entrance
Condenser
Air Outlet
J
K
L
HL*S4
LEFT
UNIT
.44
R
Built In
Rain Hood
4° Pitch
E
O
D
S
I
Heater
Access
Panel
Economizer Controls
Opposite Side
C
M
1
L
K
J
P
Cond.
Air
Inlet
T
Back View
Back View
MIS-3761
Q
W
N
Side View
1
Filter Access Panel
5.88
F
Ventilation
Air 1
H
1
Bottom
Installation
Bracket
Q
Bottom Installation
Bracket
Economizer
Intake Hood
Optional
Electrical
Entrances
Return Air Opening
Drain
N
Electric
Heat
C. Breaker/
Disconnect
Access Panel
(Lockable)
A
Top Rain
Flashing
Shipping
Location
S
S
2.13
Side Wall
Mounting
Brackets
(Built In)
B
S
S2
P
Not used when EWM Economizer is installed. Filter access through the EWM hood
Supply Air Opening
S
M
Side View
1
S1
T
Drain
Front View
Return Air Opening
S2
Low Voltage
Electrical
Entrance
G
S1
Optional
Electrical
Entrances
H
R
S1
B
Top Rain
Flashing
Shipping
Location
Ventilation
Air
F
Supply Air Opening
Low Voltage
Electrical
Entrance
High Voltage
Electrical
Entrance
Vent Option
Door 1
G
Condenser
Air Outlet
Front View
MIS-3762
Not used when EWM economizer is installed. Filter access through the EWM hood.
Manual2100-646A
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Manual2100-646A
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230/208-1
230/208-1
Model
HA/L4S4 - A0Z
- A05
- A08
- A10
- A15
HA/L5S4 - A0Z
- A05
- A08
- A10
- A15
37
37
44
44
10
10
10
8
8
10
10
10
8
8
8
8
6
4
3
8
8
6
6
3
45
45
60
70
90
50
50
60
70
90
38
38
53
63
89
44
44
53
63
89
1
1
1
1 or 2
1 or 2
1
1
1
1 or 2
1 or 2
Ckt. A
Ground
Wire

Field
Power
Wire Size

Maximum
External Fuse
or Ckt. Brkr.
k
Minimum
Circuit
Ampacity
j
No. Field
Power
Circuits
26
52
26
52
Ckt. B
Minimum
Circuit
Ampacity
j
Ckt. C
50
50
45
45
Ckt. A
30
60
30
60
Ckt. B
Ckt. C
8
8
8
8
Ckt. A
Multiple Circuit
Maximum
External Fuse
or Ckt. Brkr.
k
10
6
10
6
Ckt. B
Field
Power
Wire Size

Ckt. C
10
10
10
10
Ckt. A
10
10
10
10
Ckt. B
Ground
Wire

Ckt. C
 These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to the National Electric Code (latest version), Article 310 for power conductor sizing. CAUTION: When more than one filed power conductor circuit is run through one conduit, the conductors must be derated.
Pay special attention to Note * of Table 310 regarding Ampacity Adjustment Factors when more than three conductors are in a raceway.
 Maximum size of the time delay fuse or circuit breaker for protection of field wiring conductors.
 Based on 75°C copper wire. All wiring must conform to the National Electric Code (NEC) and all local codes.
Rated
Volts
and Phase
Single Circuit
TABLE 3
Electrical Specifications
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.
Refer to Table 7 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 1" 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.
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
A 1/4" clearance to combustible material for the first
3' of duct attached to the outlet air frame is required.
See Wall Mounting Instructions and Figures 3 and 4 for
further details.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and
return ducts.
Ducts through the walls must be insulated and all joints
taped or sealed to prevent air or moisture entering the
wall cavity.
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 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 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.
!
CAUTION
Some installations may not require any
return air duct. A 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".
Any grille that meets the 5/8" louver criteria, may be
used. It is recommended that Bard Return Air Grille
Kit RG-5 or RFG-5 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 2" pleated MERV 8 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 filter access panel.
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.
Manual2100-646A
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INSTALLATION
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.
See Figures 4 and 5.
3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the
weight of the installing 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.
2. The unit itself is suitable for 0 clearance, but the
supply air duct flange and the first 3’ of supply
air duct require a minimum of 1/4” 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” clearance is used for ease of installation and
maintaining the required clearance to combustible
material. The supply air opening would then be
32” x 12”. See Figures 2, 3 and 6 for details.
!
WARNING
Failure to provide the 1/4" clearance
between the supply duct and a combustible
surface for the first 3' of duct can result in
fire causing damage, injury or death.
Clearances Required for Service Access
and Adequate Condenser Airflow
MODELS
HA4S4, HL4S4
HA5S4, HL5S4
LEFT
SIDE
RIGHT
SIDE
DISCHARGE
SIDE
20"
20"
10”
NOTE: For side-by-side installation of two H**S4 models, there
must be 20" between units. This can be reduced to 15"
by using a HL*S4 model (left side compressor and controls) for the left unit and HA*S4 (right side compressor
and controls) for right unit.
See H**S4 Specification S3458.
Manual2100-646A
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3. Locate and mark lag bolt locations and bottom
mounting bracket location (see Figure 4).
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" diameter flat washers on the
lag bolts.
7. Secure rain flashing to wall and caulk across
entire length of top (see Figure 2).
8. For additional mounting rigidity, the return air
and supply air frames or collars can be drilled
and screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
9. On side-by-side installations, maintain a
minimum of 20" clearance on right side to
allow access to heat strips and control panel
and to allow proper airflow to the outdoor coil.
Additional clearance may be required to meet
local or national codes.
TYPICAL INSTALLATIONS
See Figure 5 for common ways to install the wall
mount unit.
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing
information and maximum fuse or 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 (75ºC
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.
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.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or 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.
See Start Up section for information on three phase
scroll compressor start ups.
The disconnect access door on this unit may be
locked to prevent unauthorized access to the
disconnect. To convert for the locking capability,
FIGURE 2
Mounting Instructions
NOTE: It is recommended that a bead of silicone
caulking be placed behind the side
mounting flanges and under the top
flashing at the time of installation.
A
B
C
D
E
REQUIRED DIMENSIONS TO MAINTAIN
1/4" MIN. CLEARANCE FROM
COMBUSTIBLE MATERIALS
30 1/2
10 1/2
6 1/4
1 1/4
29 3/4
REQUIRED DIMENSIONS TO MAINTAIN
RECOMMENDED 1" CLEARANCE FROM
COMBUSTIBLE MATERIALS
32
12
5 1/2
2
29
SEAL WITH BEAD
OF CAULKING ALONG
ENTIRE LENGTH OF
TOP.
RAIN FLASHING
SUPPLIED
FOAM AIR SEAL
TOP
WALL STRUCTURE
1/4" CLEARANCE ON ALL
FOUR SIDES OF SUPPLY
AIR DUCT IS REQUIRED
FROM COMBUSTABLE
MATERIALS
WALL
C
D
A
C
HEATER ACCESS
PANEL
SUPPLY AIR
DUCT
B
Supply Opening
16"
16"
E
16"
Return Opening
16"
16"
2
1
1
62"
30"
3"
1
1"
7
18"
1
62"
1
2
3
RETURN AIR
OPENING
16"
4"
Typ.
NOTES:
1
4"
Typ.
38"
1
1
62"
IT IS RECOMMENDED THAT A BEAD OF
SILICONE CAULKING BE PLACED BEHIND
THE SIDE MOUNTING FLANGES AND UNDER
TOP FLASHING AT TIME OF INSTALLATION.
7
8"
28"
3
Dimension is 21" on 95" tall units.
Dimension is 10" on T48H1 & T60H1.
Dimension is 6" on T48H1 & T60H1.
Wall Opening and Hole Location View
Right Side View
MIS-416 E
Manual2100-646A
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FIGURE 3
Wall 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
BOTTOM MOUNTING
BRACKET. MOUNT ON
WALL BEFORE
INSTALLING UNIT.
WOOD OR STEEL SIDING
CONCRETE BLOCK WALL INSTALLATION
WOOD FRAME WALL INSTALLATION
SIDE VIEW
MIS-548 A
FIGURE 4
Wall Mounting Instructions
SEE UNIT DIMENSIONS, FIGURE 1,
FOR ACTUAL DIMENSIONS
SEE UNIT DIMENSIONS, FIGURE 2,
FOR ACTUAL DIMENSIONS.
E + 1.000
ATTACH TO TOP
PLATE OF WALL
B
1.000
1.000" CLEARANCE
ALL AROUND DUCT
INTERIOR FINISHED WALL
OVER FRAME
SUPPLY DUCT
OPENING
A
I
1.000" CLEARANCE
ALL AROUND DUCT
RETURN DUCT
OPENING
EXTERIOR FINISH WALL
OVER FRAME
MIS-549 B
Manual2100-646A
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ATTACH TO BOTTOM
PLATE OF WALL
C
K
2x6
FRAMING MATERIAL
2 x 4'S, 2 x 6'S &/OR
STRUCTURAL STEEL
SEE FIGURE 1 FOR
DUCT DIMENSIONS
CL
THIS STRUCTURAL MEMBER
LOCATED TO MATCH STUD
SPACING FOR REST OF WALL.
A SECOND MEMBER MAY BE
REQUIRED FOR SOME WALLS.
FIGURE 5
Common Wall Mounting Installations
SUPPLY DUCT MAY BE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAIN
FLASHING
RAFTERS
RAIN
FLASHING
FINISHED CEILING SURFACE
SUPPLY AIR DUCT
SUPPLY AIR DUCT
W/ GRILLE
FINISHED CEILING SURFACE
RETURN AIR
OPENING W/ GRILLE
RETURN AIR
OPENING W/ GRILLE
OUTSIDE
WALL
RAFTERS
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 DUCT MAYBE LOCATED IN AN ATTIC
OR BELOW CEILING RAFTERS AS SHOWN
RAIN
FLASHING
SUPPLY AIR DUCT
SUPPLY AIR DUCT
LOWERED
CEILING
FINISHED
CEILING SURFACE
RETURN AIR
SPACE
WALL SLEEVE
CLOSET WALL
RETURN AIR GRILLE
FALSE WALL INSTALLATION
SUPPLY AIR
GRILLE
FINISHED CEILING
SURFACE
WALL
SLEEVE
FALSE WALL
OUTSIDE
WALL
RAFTERS
OUTSIDE
WALL
RETURN AIR
GRILLE
RAISED FLOOR
RETURN AIR
CLOSET INSTALLATION
MIS-550 B
Manual2100-646A
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FIGURE 6
Electric Heat Clearance
NOTE: Side section view of supply air duct
for wall mounted unit showing 1/4"
clearance to combustible surfaces.
!
WARNING
A minimum of 1/4" clearance must be maintained between the
supply air duct and combustible materials. This is required for the
first 3' of ducting.
It is important to insure that the 1/4" 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.
WIRING – LOW VOLTAGE WIRING
All 230/208V 1 phase and 3 phase equipment have
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:
TAPRANGE
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).
Manual2100-646A
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For wiring size and connections, refer to MV5000
Controller Manual 2100-636.
DIRTY FILTER SWITCH AND RELAY
ECONOMIZER FAIL TIME DELAY RELAY
These units include an adjustable dirty filter indicator
switch. This switch if connected to normally closed
contacts on the filter relay wired to terminals 10 and
11 on the low voltage terminal block.
NOTE: Applies only to units with economizers.
Filter Replacement Procedure
For units not equipped with economizer:
1. Turn off unit power.
2. Remove filter door.
These units employ a time delay relay to open the
nomally closed contacts at terminals 12 and 13 on the
low voltage terminal block. This will activate an alarm
signal on the MV Series controller. The time delay is set
to 500 seconds as a factory default. Avoid adjustment
to settings lower than 180 seconds.
Timer to be set here
(500 seconds)
3. Replace filter.
4. Press Reset button.
5. Verify filter light is off.
6. Replace filter door.
7. Turn on unit power.
For units equipped with economizer:
1. Turn off unit power.
2. Remove hood cover.
3. Remove mist eliminator. Inspect and clean if
necessary.
MIS-3054
MIS-3054
4. Remove filter door.
5. Remove and replace filter.
6. Replace filter door.
7. Replace mist eliminator.
8. Replace hood cover.
9. Turn on unit power.
Filter Switch Adjustment
1. Turn off unit power.
2. Remove upper front door. Front screws on unit top
can be removed for ease of removing upper front
door.
3. Locate filter switch on control panel side next to
blower assembly.
4. Remove single phillips head screw on front of
cover. Remove cover.
5. Set pressure by adjusting knob. Do not adjust
knob drastically to avoid nuisance alarm signalw or
non-functionality.
6. Replace cover.
7. Replace upper front door.
8. Turn on unit power.
Manual2100-646A
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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. Polyolester 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.
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.
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.
12.If compressor removal is necessary, always plug
compressor immediately after removal. Purge with
small amount of nitrogen when inserting plugs.
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.
TOPPING OFF SYSTEM CHARGE
IMPORTANT INSTALLER NOTE
If a leak has occurred in the system, Bard
Manufacturing recommends reclaiming, evacuating (see
criteria above) and charging to the nameplate charge.
Topping off the system charge can be done without
problems.
For improved start up performance, wash the indoor
coil with a dishwasher detergent.
11.Limit atmospheric exposure to 15 minutes.
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 pressure charts on the inner control panel
cover as a guideline.
SERVICE HINTS
1. Maintain clean air filters at all times; do not
close off or block supply and return air registers.
This reduces air flow 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.
Manual2100-646A
Page
14 of 26
Frequency of coil cleaning will depend on duty
cycle of equipment, type of use and installation
site variables. Telecommunication type
installations in high traffic areas or in areas with
frequent airborne debris will require more frequent
coil maintenance than those in areas not subject
to those conditions.
SEQUENCE OF OPERATION
Non-Economizer
Stage 1 (7) cooling call activates Step 1 (partial
capacity, 66%) of compressor capacity.
Stage 2 (8) cooling call activates Step 2 (full capacity,
100%) of compressor capacity.
See Table 4.
HIGH AND LOW PRESSURE SWITCH
All models covered by this manual are supplied with
a remote reset high pressure switch and low pressure
switch. If tripped, this pressure switch may be reset
by turning the thermostat off then back on again.
NOTE: Defective pressure switches can be replaced
without reclaiming system charge as they
are screwed onto the service port rather than
brazed onto the system.
COMPRESSOR CONTROL MODULE
The compressor control module is standard on the
models covered by this manual. The compressor control
is an anti-short cycle/lockout timer with high and low
pressure switch monitoring and alarm relay output.
Adjustable Delay-on-Make and Delay-on-Break Timer
On initial power up or anytime 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 and low pressure switches are closed, the
compressor contactor is energized. Upon shutdown,
the delay-on-break timer starts and prevents restart
until the delay-on-break and delay-on-make periods
have expired.
TABLE 4
Sequence of Operation
Terminal
Description
Use
Series "2"
Reference
Economizer Only
"A"
24V HOT
"R"
24V COMMON
"C"
1
Compressor on Output Signal from Jade to MV
2
24VAC HOT from Terminal 2 Connected to Unit Transformer
3
24VAC COMMON from Unit Transformer to MV
4
Unit Compressor Operation
Cooling Operation
"Y"
5
Close Damper Input (Close Blade 100%)
Economizer Only
"F"
6
Electric Heat On Operation, Stage 1 and 2
Heating Operation
"W1"
7
1st Stage Cooling Input, 1st Stage Cooling Signal to Jade
Economizer Only
"Y1"
8
2nd Stage Cooling Input, 2nd Stage Partial Cooling Signal to Jade
Economizer Only
"Y2"
9
Blower Operation (Indoor Blower On)
Blower Operation
"G"
10
Filter Switch Normally Closed Dry Contacts
Alarm Signal
"4"
11
Filter Switch Normally Closed Dry Contacts
Alarm Signal
"5"
12
Blade Switch Delay Relay Normally Closed Dry Contacts
Economizer Only
"8"
13
Blade Switch Delay Relay Normally Closed Dry Contacts
Economizer Only
"9"
14
Occupied Signal Input, Econ Emergency Open (Open Blade 100%)
Economizer Only
"E"
15
Econ Open Output (6V HOT, 24V HOT after Blade Open 100% and delay)
Economizer Only
"10"
16
Alarm Relay Common Dry Contact
Comp Alarm Signal
"3"
17
Alarm Relay Normally Open Dry Contact
Comp Alarm Signal
"2"
18
Alarm Relay Normally Closed Dry Contact
Comp Alarm Signal
"1"
19
24VAC HOT to Terminal 2 from Unit Transformer Through Smoke Alarm Jumper
Wire*
24V HOT
"RT"
20
2nd Stage Heating On Operated Through Jumper to Terminal 6
Heating Operation,
2nd Stage
"W2'
21
Blade Switch Terminal 24V HOT When Blade is Open, Sends Signal from Switch
to Delay Relay
Economizer Only
"7"
22
2nd Stage Cooling Input, 2nd Stage Full Capacity
Cooling Operation,
2nd Stage Full
“Y2”
* Replace jumper wire with smoke alarm connections to interrupt 24VAC unit power if smoke alarm is used in shelter. Jumper can also
be removed to break 24VAC power to unit.
Manual2100-646A
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15 of 26
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 delayon-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.
Low Ambient Control
The fan cycling control cycles the fan motor on once
the liquid refrigerant pressure reaches 350 psig, and
off once it has dropped to 225 psig. It will continue to
cycle between these parameters depending on outdoor
temperatures and the load/stage of the system.
This cycling maintains a minimum liquid pressure
affecting the minimum suction pressure. This effect
ensures an evaporating temperature that is slightly
above the point of ice formation on the evaporator.
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
1.0
2.0
3.0
4.0
5.0
minute
minute
minute
minute
minute
minute
(30 seconds) DOB = 123 second DOM
(60 seconds) DOB = 126 second DOM
(120 seconds) DOB = 132 second DOM
(180 seconds) DOB = 138 second DOM
(240 seconds) DOB = 144 second DOM
(300 seconds) DOB = 150 second DOM
During routine operation of the unit with no power
interruptions, the compressor will operate on demand
with no delay.
Typical Settings for Dual Unit Installation:
Unit 1:DOB set at 2 minutes and DOM is 132 seconds
Unit 2:DOB set at 4 minutes and DOM is 144 seconds
MOTOR START DEVICE
Single Phase (-A) model compressor circuits are
equipped with a 25 ohm PTCR (Positive Temperature
Coefficient Resistor) motor starting device as standard
equipment.
The PTCR is wired in parallel with the run capacitor.
When voltage is applied, and device is cool, its low
resistance permits a large current to flow in the
auxiliary windings—increasing the motor’s available
starting torque. The device then rapidly heats up and
the current levels drop to a few milliamperes. The
PTCR then becomes self-regulating, passing just
enough current to maintain its temperature to remain
in the high resistance state. Once the voltage source is
removed, the device cools down, the resistance drops
and is then ready for the next compressor start cycle.
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 on page
18 covering all models. It is imperative to match the
correct pressure table to the unit by model number.
Be careful to observe whether unit is operating in high
cool or low cool when utilizing the charts.
This unit employs high-flow Coremax valves instead of
the typical Shrader type valves.
WARNING! Do NOT use a Schrader valve core removal
tool with these valves. Use of such a tool could result in
eye injuries or refrigerant burns!
Manual2100-646A
Page
16 of 26
To change a Coremax valve without first removing the
refrigerant, a special tool is required which can be
obtained at www.fastestinc.com/en/SCCA07H. See the
replacement parts manual for replacement core part
numbers.
CRANKCASE HEATERS
All units covered in this manual are provided with
compressor crankcase heat.
This crankcase heater is a band type heater located
around the bottom of the compressor. This heater is
controlled by the crankcase heater relay. The heater
is only energized when the compressor is not running.
Crankcase heat is essential to prevent liquid
refrigerant from migrating to the compressor,
preventing oil pump out on compressor start up
and possible bearing or scroll vane failure due to
compressing a liquid.
The decal in Figure 7 is affixed to all model units
detailing start up procedure. This is very important.
Please read carefully.
FIGURE 7
Start Up Label
IMPORTANT
These procedures must be followed at 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, whichever 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
Manual2100-646A
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17 of 26
SERVICE
COMPRESSOR SOLENOID
FAN BLADE SETTING DIMENSIONS
A nominal 24-volt direct current coil activates the
internal compressor solenoid. The input control
circuit voltage must be 18 to 28 VAC. The coil
power requirement is 20 VA. The external electrical
connection is made with a molded plug assembly.
This plug contains a full wave rectifier to supply direct
current to the unloader coil.
The correct fan blade setting dimensions for proper air
delivery across the outdoor coil are shown in Figure 8.
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 (see Table 5).
Compressor Solenoid Test Procedure
FIGURE 8
Fan Blade Setting
If it is suspected that the unloader is not working, the
following methods may be used to verify operation.
1. Operate the system and measure compressor
amperage. Cycle the compressor solenoid on
and off at 10-second intervals. The compressor
amperage should go up or down at least 25%.
2. If Step 1 does not give the expected results, shut
unit off. Apply 18 to 28 VAC to the solenoid
molded plug leads and listen for a click as the
solenoid pulls in. Remove power and listen for
another click as the solenoid returns to its original
position.
3. If clicks can’t be heard, shut off power, remove the
control circuit molded plug from the compressor
and measure the solenoid coil resistance. The
resistance should be 32 to 60 ohms depending on
compressor temperature.
4. Next, check the molded plug.
Voltage Check: Apply control voltage to the plug wires
(18 to 28 VAC). The measured dc voltage at the female
connectors in the plug should be around 15 to 27 VDC.
Resistance Check: Measure the resistance from the
end of one molded plug lead to either of the two female
connectors in the plug. One of the connectors should
read close to 0 ohms, while the other should read
infinity. Repeat with other wire. The same female
connector as before should read 0, while the other
connector again reads infinity. Reverse polarity on the
ohmmeter leads and repeat. The female connector
that read infinity previously should now read close to 0
ohms.
Replace plug if either of these test methods does not
show the desired results.
AIRFLOW
"A"
MIS-1724
TABLE 5
Fan Blade Dimensions
Model
Dimension A
HA/L4S4
HA/L5S4
1.75"
REMOVAL OF FAN SHROUD
1. Disconnect all power to unit.
2. Remove the screws holding both grills—one on
each side of unit—and remove grills.
3. Remove nine (9) screws holding fan shroud to
condenser and bottom.
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 re-install.
Manual2100-646A
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18 of 26
R-410A REFRIGERANT CHARGE
This unit was charged at the factory with the quantity of
refrigerant listed on the serial plate. AHRI capacity and
efficiency ratings were determined by testing with this
refrigerant charge quantity.
The following pressure tables show nominal pressures
for the units. Since many installation specific
situations can affect the pressure readings, this
information should only be used by certified technicians
as a guide for evaluating proper system performance.
They shall not be used to adjust charge. If charge is in
doubt, reclaim, evacuate and recharge the unit to the
serial plate charge.
TABLE 6
Cooling Pressure – (All temperatures °F)
High Capacity Cooling
Model
HA4S4
HL4S4
HA5S4
HL5S4
Air Temperature Entering Outdoor Coil ˚F
Return Air
Temperature
Pressure
50˚
55˚
60˚
65˚
70˚
75˚
80˚
85˚
90˚
95˚
100˚
105˚
110˚
115˚
75˚ DB
62˚ WB
Low Side
High Side
117
197
119
216
121
235
123
255
125
274
127
293
128
316
130
339
131
361
132
383
133
410
135
438
136
466
137
494
80˚ DB
67˚ WB
Low Side
High Side
127
201
129
220
131
239
134
259
136
278
138
298
138
318
139
341
139
364
143
400
143
415
144
443
146
471
149
500
85˚ DB
72˚ WB
Low Side
High Side
141
203
143
223
145
243
148
263
150
283
152
303
152
326
153
349
153
372
154
396
156
422
158
449
160
478
162
508
75˚ DB
62˚ WB
Low Side
High Side
118
199
119
217
120
236
122
260
123
285
125
309
126
333
128
357
129
381
130
405
132
432
133
460
135
487
136
514
80˚ DB
67˚ WB
Low Side
High Side
129
205
130
224
131
247
131
270
132
292
132
315
134
339
137
363
139
387
141
425
143
438
145
465
146
492
148
519
85˚ DB
72˚ WB
Low Side
High Side
137
216
139
237
140
258
141
279
142
300
143
321
146
346
148
370
151
395
153
419
155
447
157
474
158
502
160
529
Low Capacity Cooling
Model
HA4S4
HL4S4
HA5S4
HL5S4
Air Temperature Entering Outdoor Coil ˚F
Return Air
Temperature
Pressure
50˚
55˚
60˚
65˚
70˚
75˚
80˚
85˚
90˚
95˚
100˚
105˚
110˚
115˚
75˚ DB
62˚ WB
Low Side
High Side
122
184
124
201
125
218
127
236
129
254
131
272
131
291
132
312
133
335
134
359
135
381
137
407
139
435
141
463
80˚ DB
67˚ WB
Low Side
High Side
132
185
134
203
136
221
138
239
140
257
142
275
145
298
146
317
147
339
148
362
149
384
150
410
151
438
152
467
85˚ DB
72˚ WB
Low Side
High Side
145
187
147
205
149
223
152
241
154
259
156
278
156
397
157
319
158
343
159
369
161
390
163
415
164
443
165
472
75˚ DB
62˚ WB
Low Side
High Side
123
187
125
207
127
226
129
245
131
263
133
282
134
305
135
328
136
350
137
373
139
399
141
425
143
451
145
477
80˚ DB
67˚ WB
Low Side
High Side
134
192
136
211
138
230
139
248
141
267
143
286
145
308
147
331
149
353
151
375
153
402
155
429
156
456
158
483
85˚ DB
72˚ WB
Low Side
High Side
146
200
148
217
149
235
151
252
152
270
154
287
156
311
159
335
161
358
163
382
165
408
166
434
168
460
169
486
Low side pressure ±4 psig
High side pressure ±10 psig
Manual2100-646A
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TROUBLESHOOTING GE ECMTM MOTORS
CAUTION:
Symptom
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
Cause/Procedure
Motor rocks slightly
when starting
• This is normal start up for ECM
Motor won’t start
• Check blower turns by hand
• No movement
• Check power at motor
• Check low voltage (24 Vac 2 to 3) at motor
• Check low voltage connections
(9, 4, 6, 2, 3) at motor
• Check for unseated pins in connectors on motor harness
• Test with a temporary jumper between 2 -9
• Check motor for tight shaft
• Perform motor/control replacement check
• Perform Moisture Check
• Motor rocks, but won’t start
Motor oscillates up
& down while being
tested off of blower
• Check for loose or compliant motor mount
• Make sure blower wheel is tight on shaft
• Perform motor/control replacement check
• It is normal for motor to oscillate with no
load on shaft
Motor starts, but
runs erratically
• Varies up and down
• Check line voltage for variation or “sag”
or intermittent
• Check low voltage connections
(9, 4, 6, 2, 3) 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
• “Hunts” or “puffs” at
high CFM (speed)
• Does removing panel or filter reduce
“puffing”?
- Reduce restriction
- Reduce max airflow
• Stays at low CFM
despite system call
for cool or heat CFM
• Check low voltage (Thermostat) wires and
connections
• Verify fan is not in delay mode; wait until
delay complete
• “2” missing/not connected at motor
• Perform motor/control replacement check
• Stays at high CFM
• “2” missing/not connected at motor
• Is fan in delay mode? - wait until delay time complete
• Perform motor/control replacement check
• Blower won’t shut off
• Current leakage from controls into 9, 4 or 6?
• Check for Triac switched thermostat or solid-state relay
Excessive noise
• Air noise
• 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
Manual2100-646A
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20 of 26
Cause/Procedure
• Noisy blower or cabinet• 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
• “Hunts” or “puffs” at• Does removing panel or filter reduce
high CFM (speed)
“puffing”?
- Reduce restriction
- Reduce max. airflow
Evidence of Moisture
• Motor failure or • Replace motor and Perform Moisture malfunction has occurredCheck
and moisture is present
• Evidence of moisture
present inside air mover
• Perform Moisture Check
Do
Don’t
• Check out motor, controls,• Automatically assume the motor is wiring and connections bad.
thoroughly before replacing
motor
• Orient connectors down so
• Locate connectors above 7 and 4 water can’t get in o’clock positions
- Install “drip loops”
• Use authorized motor and
• Replace one motor or control model model #’s for replacement # with another (unless an authorized replacement)
• Keep static pressure to a • Use high pressure drop filters some minimum: have ½” H20 drop!
- Recommend high
• Use restricted returns
efficiency, low static filters
- Recommend keeping filters
clean.
- Design ductwork for min.
static, max. comfort
- Look for and recommend
ductwork improvement,
where necessary
• Size the equipment wisely
•
• Check orientation before
•
inserting motor connectors
•
Oversize system, then compensate with low airflow
Plug in power connector backwards
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?
Replacing ECM Control Module
To replace the control module for the GE variable-speed indoor blower
motor, take the following steps:
1.
It is essential to 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 unit 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 unit. (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.
5.
6.
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). See Figure 9. 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 ECM 2.0 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.
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.
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. See Figure 10. (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 the 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 3-wire 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.
8.
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 locater 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 selected 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.
Re-install 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 (see Figure 11).
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.
Figure 9
Figure 10
Figure 11
Manual2100-646A
Page
21 of 26
TABLE 7
Indoor Blower Performance 
Model
Rated ESP
Max ESP
Continuous
CFM

Rated 1st
Stage CFM

Rated 2nd
Stage CFM

5-10 KW
CFM

15-20 KW
CFM

HA/L4S4
0.20
0.80
825
1100
1500
1100
1500
HA/L5S4
0.20
0.80
850
1300
1700
1100
1500
Motor will deliver consistent CFM through voltage supply range with no deterioration.
(197-253V for 230/208V models, 414-506V for 460V models)
Continuous CFM is the total air being circulated during continuous (manual) fan mode.
Will occur automatically with a call for "Y1" signal from thermostat.
Will occur automatically with a call for "Y2" signal from thermostat.
Will occur automatically with a call for "W1" signal from thermostat.
Will occur automatically with a call for "W2" or "Emergency Heat" signal from thermostat.
Model
HA5S4KA
HA4S4KA
TABLE 8
Optional Accessories – Right Hand Units
EHWA4S-A05
Heater Package
X
EHWA4S-A10
Heater Package
X
EHWA4S-A15
Heater Package
X
EHWA5S-A05
Heater Package
EHWA5S-A08
Heater Package
EHWA5S-A10
Heater Package
X
EHWA5S-A15
Heater Package
X
BOP-5
Blank Off Plate (Standard)
X
X
X
HL5S4KA
X
HL4S4KA
X
TABLE 9
Optional Accessories – Left Hand Units
Model
EHWA4S-A05L
Heater Package
X
EHWA4S-A10L
Heater Package
X
EHWA4S-A15L
Heater Package
X
EHWA5S-A05L
Heater Package
X
EHWA5S-A10L
Heater Package
X
EHWA5S-A15L
Heater Package
X
BOP-5
Blank Off Plate (Standard)
Manual2100-646A
Page
22 of 26
X
X
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Manual2100-646A
Page
23 of 26
128
120
119
Blk/Wht
Red/White
Red/White
127
Filter Switch
Light
13
22
10
135
2
MINUTES
LPC
500
6
3
Hi Press. Control
T2
C
Y
135
T1
31
ALR CC
R HPC
11
14
12
113
124
135
134
133
Orange
15
112
104
Filter 9
Relay
110
PINS ON 12 PIN PLUG
(FEMALE)
11
11
2
NO NC
COM
4
1
3
Low Voltage
Field Connections
To MV Controller
Condenser Section
5
Compressor
Module
23
Time
Delay
Relay
111
124
Crankcase
Relay
10
16 Pin Plug
Blue
Blue
Black/White
Orange/Black
137
Bk/Wh
Brown
Brown
Low Press. Control
Orange/Black
128
Filter Reset
Button
136
Blue
4
2
Red
Red/White
Black/White
1
3
135
Blue
5
Red
Blk/Wht
Orange/White
1
121
3
12
21
21
22
22
19
20
3
117
18
18
116
5
L1
17
4
22
110
Alarm
Relay
11
116
10
3
5
9
30
Brown
8
31
7
6
5
Black/White
1
4
10
9
Red/White
11
Smoke
Jumper
12
122
13
5
C
R
136
1
4
6
9
2
3
1
"Y" "C" "R" "A"
2
8
131
Red
Terminal
Block #2
(Opt.) 29
135
C
Start Kit 32
12
T1
L1
38
T2
L2
A
Yellow
Red
Black
Blue
Blue
137
Compressor
Contactor 7
!
WARNING
DANGER
High Voltage
Low Voltage
C
Outdoor
Fan Motor
Compressor
Crankcase Heater
COMPRESSOR OUTPUT
MIS-3773
Condenser Section
A
for Bard use only.
Wires Connect
if Option Not
Used
Factory Field Optional
Black
Brown
S
High Speed Solenoid
R
Low Ambient Control (Opt.)
Black
Black
*ELECTRICAL SHOCK HAZARD
*DISCONNECT POWER BEFORE
SERVICING.
!
USE COPPER CONDUCTORS
ONLY SUITABLE FOR AT LEAST
75° C.
99 Wire Identification numbers
Yellow
35
Dual Can Capacitor
Black
"MV CONNECTIONS"
A
38
Black
Yellow/Red
COM
Black/White
Ground
Eyelet
130
Red Wire to 208V
tap for 208V
208V
Operation
240V
Red
24V HOT INPUT
24V COMMON INPUT
CLOSE DAMPER INPUT
1ST STAGE COOLING INPUT
2ND STAGE COOLING INPUT
OCCUPIED SIGNAL INPUT
ECON OPEN OUTPUT
GROUND
ECON FAILURE OUTPUT
1
5
2
6
7
8
3
4
104
135
135
119
Transformer 8
13 Ground Lug
Hi Voltage Field Connections
"9" "8" "5" "4" "G" "Y2" "Y1""W1" "F"
12
111
13
112
118
117
Red
Yellow/Red
2
230/208-60-1
Per Nameplate
Red
L2
2ND STAGE COOLING OUTPUT
7
15
16
10
14
15
16
14
123
113
LOUT LOUT DAMPER ECON
E
2
3
17
Black
4
5 Pin Plug 34
118
19
119
20
120
31
6
Brown
6
Red
Blk/Wht
Orange/White
Pink
Red/Blue
5
Red/Black
4
Blue/Black
3
Orange
2
Red/Black
Black
Orange/White
Blue
Green
Yellow/Black
Yellow/White
Black
Brown/White
Blue/Black
Purple
Pink
Yellow
Black/White
Red/White
Yellow/Red
Purple
Purple
Black/White
Yellow/Red
Red/White
Blue
Blue/White
Black/White
Black/White
1
Yellow
N
FA
Red/White
Yellow
Yellow
Black
Yellow
Red
H
ER
M
Manual2100-646A
Page
24 of 26
Black
6 Pin Electric Heat Plug 11
FIGURE 12A
H**S4 Wiring Diagram – Top
11
ORANGE/BLACK
BLUE/WHITE
1
2
3
4
5
6
IAQ +
IAQ IAQ24V
ACT +
ACT ACT 24V
MAT +
MAT OAT +
OAT S-BUS
S-BUS
RELAY
NO
NC
4
Green
48
COM
6
5
4
3
2
1
RED
BLACK
Yellow/Red
7
Smoke
Jumper
8
5
Pink
ECONOMIZER CONTROL PANEL
7
12 PIN PLUG
MALE
BROWN/WHITE
YELLOW/WHITE
BLUE
YELLOW/RED
GREEN
PINK
ORANGE
PURPLE
YELLOW
BLACK
RED
8
1
Purple
2
Black/White
6
9
Red/White
8
Yellow
Low Voltage
High Voltage
A
for Bard use only.
Wires Connect
if Option Not
Used
Factory Field Optional
Condenser Section
99 Wire Identification numbers
"MV CONNECTIONS"
5
3
2
8
6
9
10
12
1
7
4
5
6
11
12
3
2
8
9
7
4
1
MIXED AIR
TEMPERATURE
SENSOR 46
1
2
3
4
11
12 PIN PLUG
FEMALE
2ND STAGE COOLING INPUT
2ND STAGE COOLING OUTPUT
1ST STAGE COOLING INPUT
COMPRESSOR OUTPUT
24V COMMON INPUT
24V HOT INPUT
ECON OPEN OUTPUT
13
3
OUTSIDE AIR
TEMPERATURE
SENSOR
CONTACT POSITION
IS SHOWN WITH THE
DAMPER BLADE IN
THE CLOSED POSITION
DAMPER MOTOR
BL. SWITCH
NC
NO
COM
ECON FAILURE OUTPUT
CLOSE DAMPER INPUT
OCCUPIED SIGNAL INPUT
GROUND
ORANGE
ORANGE
BLACK
RED
RED
BLACK
BROWN
BROWN
1
12 PIN PLUG
FEMALE
BLUE/WHITE
ORANGE/BLACK
YELLOW/WHITE
COMPRESSOR OUTPUT
24V HOT INPUT
24V COMMON INPUT
CLOSE DAMPER INPUT
1ST STAGE COOLING INPUT
2ND STAGE COOLING INPUT
OCCUPIED SIGNAL INPUT
ECON OPEN OUTPUT
GROUND
ECON FAILURE OUTPUT
Blue/White
12 PIN PLUG
MALE
YELLOW/WHITE
2ND STAGE COOLING OUTPUT
Brown/White
10
PLUG
PLUG
6
5
4
3
2
1
RED/BLACK
3
Y2-I
Y2-O
Y1-I
Y1-O
C
R
AUX2-I
OCC
E-GND
EXH1
AUX1-O
THIS WIRE IS PART OF
12 PIN PLUG MALE 7
12
Yellow/White
ORANGE
ORANGE
3
Orange/White
ECONOMIZER CONTROL
MODULE
1
2
3
4
5
6
PLUG
PLUG
RED
BLACK
BROWN
BROWN
Temperature econ. version shown.
For Enthalpy version, these wires
connect to "S-BUS" terminals.
PINS ON 12 PIN PLUG
(FEMALE)
122
Red/White
Yellow/White
Orange/White
Yellow/Red
Brown/White
Green
Blue/White
Purple
MIS-3773
Pink
Yellow
Red/White
Black/White
Field Connections
To MV Controller
FIGURE 12B
H**S4 Wiring Diagram – Bottom
Manual2100-646A
Page
25 of 26
FIGURE 13
H**S4 Low Voltage Ladder Diagram for Unit and MV Connections
Blk/Wht
Filter Light
Pin 6 on Vent Plug
MV
Controller
Low Voltage
Terminal Strip
C
3
R
2
4
10
5
11
W
6
Pin 9 on Vent Plug
R on
Compressor
Control Module
9
Bk/W
Red/Wht
Filter
Switch
Filter Reset Button
Org/Blk
Red/Wht
Org/Blk
1
3
5
4
Blue/Blk
Filter
Relay
Blue/Blk
Pin 6 on Heater Plug
Blue
Brown
20
G
Rd/W
Pin 3 on Heater Plug
Blower Relay
Pin 1 on Heater Plug
Orange
Blk/Wht
L3
16
Black
L2
17
Blue
18
8
12
9
13
21
19
Y
4
2
5
Red
Alarm Relay
Red/Blk
NC
Red/Blk
Pin 12 on V. Plug
Yel/Blk
T2
COM
T1
Hi Press. Sw.
Y
LPC
Red
Red
Blue
Blue
Lo Press. Sw.
Pin 8 on Vent Plug
A
1
F
5
Y1
7
Purple
Y2
8
Pink
Pin 5 on Vent Plug
EE
14
Yel/Red
Pin 7 on Vent Plug
DR
15
Manual2100-646A
Page
26 of 26
Yellow
Blue/Wht
Brown/Wht
Blk/Wht
Time Delay Relay
Hot
Comp. Control Module
Red/Blue
Yellow
4
Pin 1 on Vent Plug
Pin 2 on Vent Plug
Pin 10 on Vent Plug
Transformer 24VAC
Common
HPC
CC
LPC
ALR
Compressor
Contactor
Bk/Wh
Pink
Alarm Relay
1
3
Low Voltage
Ladder Diagram
for Unit and MV
Connections
MIS-3712