INSTALLATION
INSTRUCTIONS
WALL MOUNTED
PACKAGED
AIR CONDITIONER
Models:
H42A2H42L2
H48A2 H48L2
H60A2 H60L2
MIS-2498
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914...Moving ahead just as planned.
Manual :
2100-585
Supersedes: NEW
File:
Volume III Tab 16
Date:03-13-13
Manual2100-585
Page
1 of 19
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
Condensate Drain ..................................................... 5
Installation Instructions
Wall Mounting Information......................................... 6
Mounting the Unit....................................................... 6
Clearances Required................................................. 6
Minimum Clearances................................................. 6
Wiring – Main Power................................................ 12
Wiring – Low Voltage Wiring.................................... 12
Dirty Filter Switch & Relay....................................... 12
Economizer Fail Time Delay Relay.......................... 12
Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Unit Dimensions....................................... 7
Mounting Instructions - H42, 48, 60......... 8
Electric Heat Clearance........................... 9
Wall Mounting Instructions..................... 10
Wall Mounting Instructions..................... 10
Common Wall Mounting Installations..... 11
Fan Blade Setting.................................. 15
Manual2100-585
Page 2 of 19
Start Up
General ............................................................... 13
Topping Off System Charge..................................... 13
Safety Practices....................................................... 13
Important Installer Note............................................ 13
High Pressure Switch............................................... 13
Condenser Fan Operation....................................... 14
Service Hints............................................................ 14
Sequence of Operation............................................ 14
Compressor Control Module.................................... 14
Adjustments............................................................. 14
Pressure Service Ports............................................ 14
Troubleshooting
Fan Blade Setting Dimensions................................. 15
Refrigerant Charge.................................................. 15
Removal of Fan Shroud........................................... 15
Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Fan Blade Dimensions........................... 15
Cooling Pressure................................... 16
Electrical Specifications H**A, H**L....... 17
Recommended Airflow........................... 18
Indoor Blower Performance................... 18
Electric Heat........................................... 18
Optional Accessories............................. 19
Vent & Control Options.......................... 19
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually find these
at your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.
National Electrical Code........................ ANSI/NFPA 70
Standard for the Installation................ ANSI/NFPA 90A
of Air Conditioning and Ventilating Systems
Standard for Warm Air........................ ANSI/NFPA 90B
Heating and Air Conditioning Systems
Load Calculation for .......................... ACCA Manual J
Residential Winter and Summer Air Conditioning
Duct Design for Residential................ ACCA Manual D
Winter and Summer Air Conditioning and Equipment
Selection
FOR MORE INFORMATION, CONTACT
THESE PUBLISHERS:
ACCA
Air Conditioning Contractors of America
1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: (202) 483-9370
Fax: (202) 234-4721
ANSI
American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: (212) 642-4900
Fax: (212) 302-1286
ASHRAE
American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: (404) 636-8400
Fax: (404) 321-5478
NFPA
National Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: (800) 344-3555
Fax: (617) 984-7057
Manual2100-585
Page
3 of 19
WALL MOUNT GENERAL INFORMATION
AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE
H
42 A
MODEL NUMBER
CAPACITY
42-3½ Ton
48 - 4 Ton
60 - 5 Ton
2 –
A
05
P
X
KW
A - Right Hand Air Conditioner
L - Left Hand Air Conditioner
VENTILATION OPTIONS
B - Blank-off Plate (No Ventilation)
W- 100% Economizer Temperature
T - 100% Economizer Enthalpy
G- 100% Economizer DC Temperature
F - 100% Economizer DC Enthalpy
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.
X
X
J
CONTROL MODULES
(See Spec. Sheet)
REVISIONS
VOLTS & PHASE
A-230/208/60/1
Manual2100-585
Page 4 of 19
X
COIL OPTIONS
X-Standard
COLOR OPTIONS
1 - Phenolic Coated Evaporator
X - Beige (Standard)
2 - Phenolic Coated Condenser
1-White
3 - Phenolic Coated Evaporator
4 - Buckeye Gray
and Condenser
5 - Desert Brown
6 - Dark Bronze
OUTLET OPTIONS
A-Aluminum
S - Stainless Steel X - Front (Standard)
FILTER OPTIONS
P -2 inch Pleated MERV 8
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
FILTERS
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.
A 2-inch pleated MERV 8 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.
Refer to Table 5 for maximum static pressure available
for duct design.
Design the duct work according to methods given by
the Air Conditioning Contractors of America (ACCA).
When duct runs through unheated spaces, it should be
insulated with a minimum of one inch of insulation.
Use insulation with a vapor barrier on the outside of the
insulation. Flexible joints should be used to connect
the duct work to the equipment in order to keep the
noise transmission to a minimum.
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.
For model series H42, H48 and H60 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 2 and 3 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 RG5 or 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.
Manual2100-585
Page
5 of 19
INSTALLATION INSTRUCTIONS
WALL MOUNTING INFORMATION
WARNING
1.Two holes for the supply and return air openings
must be cut through the wall as shown in Figure 2.
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.
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.
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.
5.Hook top rain flashing, attached to front - right of
supply flange for shipping, under back bend of top.
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 for model series
H42, H48 and H60. 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 2 for
details on opening sizes.
7.Secure rain flashing to wall and caulk across entire
length of top. See Figure 2.
3.Locate and mark lag bolt locations and bottom
mounting bracket location. See Figure 2.
4.Mount bottom mounting bracket.
Clearances Required for Service Access
and Adequate Condenser Airflow
MODELS
LEFT SIDE
RIGHT SIDE
H42A, H48A, H60A
20"
20"
H42L, H48L, H60L
20"
20"
NOTE: For side by side installation of two (2) H**A models there
must be 20" between units. This can be reduced to 15" by using a
H**L model (left side compressor and controls) for the left unit and
HA (right side compressor and controls) for right unit.
Manual2100-585
Page 6 of 19
6.Position unit in opening and secure with 5/16 lag
bolts; use 7/8 inch diameter flat washers on the lag
bolts.
8.For additional mounting rigidity, the return air
and supply air frames or collars can be drilled
and screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
9.On side-by-side installations, maintain a minimum
of 20 inches clearance on right side to allow access
to control panel and heat strips, and to allow proper
airflow to the outdoor coil. Additional clearance
may be required to meet local or national codes.
Minimum Clearances Required to
Combustible Materials
MODELS
H42A, L / H48A, L
H60A, L
SUPPLY AIR DUCT
FIRST THREE FEET
CABINET
1/4"
0"
FIGURE 1
Dimensions of Basic Unit for Architecural & Installation Requirements (Nominal)
MODEL
WIDTH
(W)
DEPTH
(D)
HEIGHT
(H)
SUPPLY
RETURN
A
B
C
B
E
F
G
I
J
K
L
M
N
O
P
Q
R
S1
S2
T
H42A
H42L
H48A
H48L
H60A
H60L
42.075
22.432
84.875
9.88
29.88
15.88
29.88
43.88
19.10
31.66
30.00
32.68
26.94
34.69
32.43
3.37
43.00
23.88
10.00
1.44
16.00
16.00
1.88
All dimensions are in inches. Dimensional drawings are not to scale.
H**A
RIGHT
UNIT
Built In
Rain Hood
4° Pitch
Heater
Access
Panel
Electric
Heat
C. Breaker/
Disconnect
Access Panel
(Lockable)
Economizer
Air Intake Hood
W
E
O
D
.44
2.13
I
Filter Access Panel 1
5.88
F
G
S
B
S
Optional
Electrical
Entrances
Return Air Opening
S
S
11"
Low Voltage
Electrical
Entrance
Condenser
Air Outlet
R
Supply Air Opening
Top Rain
Flashing
Shipping
Location
C H
Standard
flush vent
door for
non-Econ.
models
Ventilation Air
Side Wall
Mounting
Brackets
(Built In)
A
Cond.
Air
Inlet
High Voltage
Electrical
Entrance
K
L
J
M
S
P
T
Drain
Front View
N
Side View
Q
Bottom Installation
Bracket
Back View
MIS-3210
NOTE 1: Not used when ECONWMT Economizer installed. Filter access is through the ECONWMT hood.
H**L
LEFT
UNIT
.44
R
Built In
Rain Hood
4° Pitch
E
O
D
Side Wall
Mounting
Brackets
(Built In)
Supply Air Opening
S
2.13
B
A
S
Optional
Electrical
Entrances
Return Air Opening
S
W
Standard flush
vent door for
non-Econ.
models
Economizer
Air Intake Hood
I
Top Rain
Flashing
Shipping
Location
Electric
Heat
Heater
Access
Panel
C. Breaker/
Disconnect
Access Panel
(Lockable)
Filter Access Panel 1
C
5.88
Ventilation Air
F
Condenser
Air Outlet
G
H
S
L
M
S
P
K
J
Cond.
Air
Inlet
T
Drain
Bottom
Installation
Bracket
Back View
N
Q
Side View
11"
Low Voltage
Electrical
Entrance
High Voltage
Electrical
Entrance
Front View
MIS-3211
NOTE 1: Not used when ECONWMT Economizer installed. Filter access is through the ECONWMT hood.
Note 1: When security fences, theft guards, or other objects restrict use of the standard 100% air intake hood the alternate 3" air intake hood
Bard Part Number WMDK5- (color) may be ordered; however, it will result in only 75% of cooling rated airflow in the full open position instead
of the 100% airflow when standard 16" is used. Economizers not used with HA4-5S 2-Stage models.
Manual2100-585
Page
7 of 19
Manual2100-585
Page 8 of 19
2
7
18"
1
16""
1
16""
16"
16"
16"
4"
Typ.
1
1
62"
38"
C
5 1/2
6 1/4
C
Dimension is 21" on 95" tall units.
Dimension is 10" on T48H1 & T60H1.
Dimension is 6" on T48H1 & T60H1.
4"
Typ.
1"
3"
30"
Return Opening
Supply Opening
A
12
10 1/2
B
Wall Opening and Hole Location View
3
2
1
1
62"
1
62"
C
32
REQUIRED DIMENSIONS TO MAINTAIN
RECOMMENDED 1" CLEARANCE FROM
COMBUSTIBLE MATERIALS
D
30 1/2
REQUIRED DIMENSIONS TO MAINTAIN
1/4" MIN. CLEARANCE FROM
COMBUSTIBLE MATERIALS
A
2
E
3
29
29 3/4
7
8"
28"
1
16"
E
B
1 1/4
D
TOP
HEATER ACCESS
PANEL
WALL
SEAL WITH BEAD
OF CAULKING ALONG
ENTIRE LENGTH OF
TOP.
NOTES:
MIS-416 E
IT IS RECOMMENDED THAT A BEAD OF
SILICONE CAULKING BE PLACED BEHIND
THE SIDE MOUNTING FLANGES AND UNDER
TOP FLASHING AT TIME OF INSTALLATION.
RETURN AIR
OPENING
SUPPLY AIR
DUCT
1/4" CLEARANCE ON ALL
FOUR SIDES OF SUPPLY
AIR DUCT IS REQUIRED
FROM COMBUSTABLE
MATERIALS
WALL STRUCTURE
FOAM AIR SEAL
RAIN FLASHING
SUPPLIED
Right Side View
FIGURE 2
H42A2, H42L2, H48A2, H48L2, H60A2, H60L2
MOUNTING INSTRUCTIONS
FIGURE 3
ELECTRIC HEAT CLEARANCE
H42A2, H42L2, H48A2, H48L2, H60A2, H60L2
NOTE 1: 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.
Manual2100-585
Page
9 of 19
FIGURE 4
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
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 5
WALL MOUNTING INSTRUCTIONS
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
K
2x6
FRAMING MATERIAL
2 x 4'S, 2 x 6'S &/OR
STRUCTURAL STEEL
MIS-549 B
Manual2100-585
Page 10 of 19
ATTACH TO BOTTOM
PLATE OF WALL
C
CL
THIS STRUCTURAL MEMBER
LOCATED TO MATCH STUD
SPACING FOR REST OF WALL.
A SECOND MEMBER MAY BE
REQUIRED FOR SOME WALLS.
FIGURE 6
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
Manual2100-585
Page
11 of 19
WIRING – MAIN POWER
WIRING – LOW VOLTAGE WIRING
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.
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:
TAPRANGE
240
253 – 216
208
220 – 187
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 3 & 4 for Electrical Specifications.
Low Voltage Connection
These units use a 24-volt AC low voltage circuit.
The “R” terminal is the hot terminal and the “C”
terminal is grounded.
“G” terminal is the fan input.
“Y” terminal is the compressor input for cooling
1-Stage units only
“W1” terminal is the 1st stage electric heat.
“W2” terminal is the 2nd stage heat (if equipped).
“E”, “F”, “Y2” & “A” Used with ECONWMT Economizer.
“1” NO (normally open) lockout alarm.
“2” NC (normally closed) lockout alarm.
“3” COM lockout alarm.
“4” & “5” dirty filter alarm NC (normally closed).
“6” Used with MD4000 only; do not use for anything else!
“Y1” & “7” Used with ECONWMT Economizer; do
not use for anything else!
“8” & “9” ECON Fail Alarm.
Manual2100-585
Page 12 of 19
For H model units with T or W vent option economizers,
refer to the MV4000 Series Lead/Lag Controller manual
2100-571 for low voltage connections diagrams.
Factory installed T and W vent option are wired per
Figure 7 of 2100-571. T and W vent option economizers
CAN NOT be used with MD4000 Lead/Lag Controllers.
For H model units with F or G vent option economizers,
refer to the MD 4000 Series Lead/Lag Controller
manual 2100-574 for low voltage connections diagrams.
F and G vent option economizers MUST be used with
the MD4000 Lead/Lag Controller. No other Lead/
Lag Controller or thermostat is compatible with this
economizer. Factory installed F and G vent option
economizers are wired per Figure 2 of 2100-574.
DIRTY FILTER SWITCH & RELAY
These units include a dirty filter switch and relay. The
alarm output of relay is normally closed, open on alarm
and is connected to terminals 4 and 5 of the unit low
voltage terminal block.
ECONOMIZER FAIL TIME DELAY RELAY
NOTE: Applies only to units with economizers.
These units employ a time delay relay used in
conjunction with the 100% Economizers to provide an
economizer fail alarm. The alarm output is connected
to terminals 8 and 9 of the low voltage terminal block.
The time delay should be set to no less than 3 minutes
to ensure no nuisance alarms.
TIMER TO BE
SET HERE

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.
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).
MIS-3054
MIS-3054
START UP
THESE UNITS REQUIRE R-410A
REFRIGERANT AND POLYOL
ESTER OIL.
GENERAL:
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
1. Use separate service equipment to avoid cross contamination of oil and refrigerants.
2. Use recovery equipment rated for R-410A refrigerant.
Failure to conform to these practices
could lead to damage, injury or death.
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.
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.
11.Limit atmospheric exposure to 15 minutes.
7. Never fill cylinders over 80% of total capacity.
12.If compressor removal is necessary, always plug compressor immediately after removal. Purge with small amount of nitrogen when inserting plugs.
8. Store cylinders in a cool area, out of direct sunlight.
TOPPING OFF SYSTEM CHARGE
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.
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 pressure charts on the inner control panel
cover as a guideline.
9. Never heat cylinders above 125°F.
IMPORTANT INSTALLER NOTE
For improved start up performance wash the indoor coil
with a dish washing detergent.
HIGH PRESSURE SWITCH
All H**A/H**L 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.
Manual2100-585
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START UP (Continued)
CONDENSER FAN OPERATION
Applies to H42, H48 and H60 models only. NOTE:
Certain models may be equipped with a Low Ambient
Control (LAC), and if so equipped the condenser fan
motor will have delay start until system refrigerant
operationg pressure builds up. After starting, the fan
motor may or may not cycle depending upon ambient
conditions. This is normal operation. The condenser fan
motor on 230/208 volt, one and three phase, 60 HZ units is
a two-speed motor that comes factory wired on high speed
for peak performance. If ambient conditions permit, it can
be reconnected to low speed (red wire) for lower sound
level. See wiring diagram.
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.
SEQUENCE OF OPERATION
COOLING – Circuit R-Y makes at thermostat pulling
in compressor contactor, starting the compressor
and outdoor motor. (See Note under Condenser Fan
Operation if equipped with Low Ambient Control.)
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. On a call for heating, circuit R-W1
make at the thermostat pulling in heat contact for the
strip heat and blower operation. On a call for second
stage heat, R-W2 makes bringing on second heat
contactor, if so equipped.
COMPRESSOR CONTROL MODULE
The compressor control module is standard on all models
covered by this manual. The compressor control module
is an anti-short cycle/lockout timer with high and low
pressure switch monitoring and alarm relay output.
Adjustable Delay On Make And Break Timer
On initial power up or 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 switch and low pressure switch is 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.
During routine operation of the unit with no power
interruptions, the compressor will operate on demand
with no delay.
Manual2100-585
Page 14 of 19
High Pressure Switch and Lockout Sequence
If the high pressure switch opens, the compressor
contactor will de-energize immediately. The lockout timer
will go into a soft lockout and stay in soft lockout until
the high pressure switch closes and the delay on break
time has expired. If the high pressure switch opens again
in this same operating cycle, the unit will go into manual
lockout condition and the alarm relay circuit will energize.
Recycling the wall thermostat resets the manual lockout.
Low Pressure Switch, Bypass & Lockout Sequence
If the low pressure switch opens for more than 120
seconds, the compressor contactor will de-energize
and go into a soft lockout. Regardless the state of the
low pressure switch, the contactor will reenergize after
the delay on make time delay has expired. If the low
pressure switch remains open, or opens again for longer
than 120 seconds, the unit will go into manual lockout
condition and the alarm relay circuit will energize.
Recycling the wall thermostat resets the manual lockout.
Alarm Relay Output
Alarm terminal is output connection for applications
where alarm relay is employed. This terminal is
powered whenever the 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 unit
model. The lockout features, both soft and manual,
are a function of the Compressor Control Module.
ADJUSTMENTS
Adjustable Delay on Make and Delay on Break Timer
The potentiometer is used to select Delay on Break time
from 30 seconds to 5 minutes. Delay on Make (DOM)
timing on power-up and after power interruptions is equal
to 2 minutes plus 10% of Delay on Break (DOB) setting:
0.5 minute (30 seconds) DOB=123 second DOM
1.0 minute (60 seconds) DOB=126 second DOM
2.0 minute (120 seconds) DOB=132 second DOM
3.0 minute (180 seconds) DOB=138 second DOM
4.0 minute (240 seconds) DOB=144 second DOM
5.0 minute (300 seconds) DOB= 150 second DOM
During routine operation of the unit with no power
interruptions the compressor will operate on demand
with no delay.
Typical Settings for Dual Unit Installation:
Unit 1: DOB set at 2 minutes, and DOM is 132 seconds
Unit 2: DOB set at 4 minutes, and DOM is 144 seconds
PRESSURE SERVICE PORTS
High & low pressure service ports are installed on all units
so that the system operating pressures can be observed. A
pressure table can be found later in the manual covering all
models. It is imperative to match the correct pressure table
to the unit by model number. See Table 2.
TROUBLESHOOTING
FAN BLADE SETTING DIMENSIONS
Shown in Figure 7 is the correct fan blade setting for
proper air delivery across the outdoor coil. Refer to
Table 1 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 7
FAN BLADE SETTING
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.
REMOVAL OF FAN SHROUD
1.Disconnect all power to the unit.
AIRFLOW
2.Remove the screws holding both grilles, one on
each side of unit, and remove grilles.
"A"
MIS-1724
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.
TABLE 1
FAN BLADE DIMENSION
Model
Dimension
A
H42A2 / H42L2
H48A2 / H48L2
H60A2 / H60L2
1.75"
7.Reverse steps to reinstall.
Manual2100-585
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TABLE 2
COOLING PRESSURE TABLE
Air Temperature Entering Outdoor Coil °F
Model
H42A/L
H48A/L
H60A/L
Return Air Temp
(DB/WB)
Pressure
75
80
85
90
95
100
105
110
115
120
75° DB
62° WB
Low Side
High Side
123
320
124
342
126
367
128
391
130
416
132
443
134
469
136
496
137
526
139
554
80° DB
67° WB
Low Side
High Side
132
328
133
351
135
376
137
401
139
427
141
454
143
481
145
509
147
539
149
568
85° DB
72° WB
Low Side
High Side
137
339
138
363
140
389
142
415
144
442
146
470
148
498
150
527
152
558
154
588
75° DB
62° WB
Low Side
High Side
117
355
119
378
121
403
123
427
125
454
127
482
129
510
131
539
133
570
135
603
80° DB
67° WB
Low Side
High Side
125
364
127
388
129
413
132
438
134
466
136
494
138
523
140
553
142
585
144
618
85° DB
72° WB
Low Side
High Side
129
377
131
402
134
427
137
453
139
482
141
511
143
541
145
572
147
605
149
640
75° DB
62° WB
Low Side
High Side
122
346
124
371
126
396
128
421
130
447
131
473
133
499
135
526
137
553
138
580
80° DB
67° WB
Low Side
High Side
131
355
133
380
135
406
137
432
139
458
140
485
142
512
144
539
146
567
148
595
85° DB
72° WB
Low Side
High Side
136
367
138
393
140
420
142
447
144
474
145
502
147
530
149
558
151
587
153
616
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”.
Manual2100-585
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TABLE 3
Electrical Specifications 1-Stage Compressor Models
Single Circuit
MODEL
H42A2-A00, A0Z
H42L2
A05
A10
A15
H48A2-A00, A0Z
H48L2
A05
A10
A15
H60A2-A00, A0Z
H60L2
A05
A10
A15



Rated
Volts &
Phase
No.
Field
Power
Circuits
Dual Circuit
l
Minimum
Circuit
Ampacity
j Maximum
External
Fuse or Ckt.
Breaker
l
Minimum
Circuit
Ampacity
j
Maximum
External
Fuse or
Ckt. Brkr.
k
Field
Power
Wire
Size
k
Ground
Wire
Ckt. A
Ckt. B
Ckt. A
Ckt. B
Ckt. A
Ckt. B
Ckt. A
Ckt. B
230/208-1
1
1
1
1 or 2
32
32
58
84
50
50
60
90
8
8
6
4
10
10
10
8
58
26
60
30
6
10
10
10
230/208-1
1
1
1
1 or 2
39
39
58
84
50
50
60
90
8
8
6
4
10
10
10
8
58
26
60
30
6
10
10
10
230/208-1
1
1
1
1 or 2
42
42
60
86
60
60
60
90
8
8
6
3
10
10
10
8
60
26
60
30
6
10
10
10
k
Field Power
Wire Size
k
Ground Wire
Size
Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.
Based on 75C copper wire. All wiring must conform to the National Electrical Code and all local codes.
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) current carrying conductors are in a raceway.
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses and conductor wires in accordance with the National Electrical Code and all local codes.
Manual2100-585
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TABLE 4
RECOMMENDED AIRFLOW
Model
Rated
CFM *
Rated
ESP *
Recommended
Airflow Range
Factory Speed
Connection
H42A, H42L
1400
.45
1600 - 1150
High
H48A, H48L
1550
.30
1750 - 1285
High
H60A, H60L
1700
.40
1950 - 1375
High
* Rated CFM and ESP on high speed tap.
TABLE 5
INDOOR BLOWER PERFORMANCE
H42/48
Speed
ESP
(Inch H20)
H60
High
Dry Coil
Low
Wet Coil
Dry Coil
High
Wet Coil
Dry Coil
Low
Wet Coil
Wet Coil
0.0
1850
1800
1605
1555
2080
2015
1505
1460
0.1
1775
1725
1545
1500
2020
1960
1450
1405
0.2
1685
1640
1460
1415
1925
1865
1395
1355
0.3
1590
1550
1390
1345
1870
1815
1340
1300
0.4
1495
1460
1310
1270
1755
1705
1225
1185
0.5
1400
1365
1225
1185
1660
1610
1125
1085
TABLE 6
ELECTRIC HEAT
Models
Manual2100-585
Page 18 of 19
Dry Coil
240V-1
208V-1
KW
Amps
BTUH
Amps
BTUH
5
20.8
17065
18.1
12800
10
41.6
34130
36.2
25600
15
62.5
51250
54.0
38400
H48A2-A
H60A2-A
H42A2-A
CIRCUIT
BREAKER
(WMCB) & PULL
DISCONNECT
(WMPD)
HEATER KITS
TABLE 7
OPTIONAL ACCESSORIES
EHWA05-A05
X
X
EHWA05-A10
X
X
X
EHWA05-A15
X
X
X
WMCB-08A
X
X
Factory Installed
Option Number
N/A
H42, H48, H60
TABLE 8
VENT & CONTROL OPTIONS
Field Installed
Part Number
CMC-15
Start Kit (230V 1-Phase)
X
B
BOP-5
Blank Off Plate
X
T
ECONWMT-T5*
100% Economizer Temperature
X
W
ECONWMT-E5*
100% Economizer Enthalpy
X
F
N/A
100% Economizer DC Temperature
X
G
N/A
100% Economizer DC Enthalpy
X
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