Bard H42A2 User manual

Manual 2100-585A
Page 1 of 19
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
Since 1914...Moving ahead just as planned.
MIS-2498
WALL MOUNTED
PACKAGED
AIR CONDITIONER
INSTALLATION
INSTRUCTIONS
Models:
H42A2 H42L2
H48A2 H48L2
H60A2 H60L2
Manual : 2100-585A
Supersedes: 2100-585
File: Volume III Tab 16
Date: 03-05-14

Manual 2100-585A
Page 2 of 19
CONTENTS
Figures
Figure 1 Unit Dimensions......................................7
Figure 2 Mounting Instructions - H42, 48, 60........8
Figure 3 Electric Heat Clearance..........................9
Figure 4 Wall Mounting Instructions....................10
Figure 5 Wall Mounting Instructions....................10
Figure 6 Common Wall Mounting Installations.... 11
Figure 7 Fan Blade Setting .................................15
Tables
Table 1 Fan Blade Dimensions..........................15
Table 2 Cooling Pressure ..................................16
Table 3 Electrical Specications H**A, H**L ......17
Table 4 Recommended Airow ..........................18
Table 5 Indoor Blower Performance ..................18
Table 6 Electric Heat..........................................18
Table 7 Optional Accessories ............................19
Table 8 Vent & Control Options .........................19
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
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

Manual 2100-585A
Page 3 of 19
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help you install the air
conditioner or heat pump. You can usually nd 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 ofAmerica
1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: [phone]
Fax: [phone]
ANSI American National Standards Institute
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone]
Fax: [phone]
ASHRAE American Society of Heating, Refrigeration
and Air Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone]
Fax: [phone]
NFPA National Fire ProtectionAssociation
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-585A
Page 4 of 19
WALL MOUNT GENERAL INFORMATION
AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE
H 42 A 2 – A 05 X P X X X J
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. If
damage is found, the receiving party must contact
the last carrier immediately, preferably in writing,
requesting inspection by the carrier’s agent.
GENERAL
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and return
ducts.
These instructions explain the recommended method
to install the air cooled self-contained unit and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly “Starting
Procedure” and any tags and/or labels attached to the
equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any
national and/or local codes in any way. Authorities
having jurisdiction should be consulted before the
installation is made. See Page 3 for information on
codes and standards.
Size of unit for a proposed installation should be based
on heat loss 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.
KW
MODEL NUMBER CONTROL MODULES
(See Spec. Sheet)
VOLTS & PHASE
A - 230/208/60/1
REVISIONS
VENTILATION OPTIONS
B - Blank-off Plate (No Ventilation)
W- 100% Economizer Temperature
T - 100% Economizer Enthalpy
G - 100% Economizer DCTemperature
F - 100% Economizer DC Enthalpy
FILTER OPTIONS
P - 2 inch Pleated MERV 8
COLOR OPTIONS
X - Beige (Standard)
1 - White
4 - Buckeye Gray
5 - Desert Brown
6 - Dark Bronze
A - Aluminum
S - Stainless Steel
COIL OPTIONS
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator
and Condenser
OUTLET OPTIONS
X - Front (Standard)
CAPACITY
42 - 3 ½ Ton
48 - 4 Ton
60 - 5 Ton
A - Right HandAir Conditioner
L - Left Hand Air Conditioner

Manual 2100-585A
Page 5 of 19
DUCT WORK
All duct work, supply and return, must be properly
sized for the design airow requirement of the
equipment. Air Conditioning Contractors of America
(ACCA) is an excellent guide to proper sizing. All duct
work or portions thereof not in the conditioned space
should be properly insulated in order to both conserve
energy and prevent condensation or moisture damage.
Refer to Table 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.
For model series H42, H48 and H60 a 1/4 inch
clearance to combustible material for the rst 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 lter grille, lters
must be of sufcient 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-inch pleated MERV 8 is standard with each
unit. The lter slides into position making it easy to
service. This lter can be serviced from the outside by
removing the lter 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.

Manual 2100-585A
Page 6 of 19
Clearances Required for Service Access
and Adequate Condenser Airow
MODELS LEFT SIDE RIGHT SIDE
H42A, H48A, H60A 20" 20"
H42L, H48L, H60L 20" 20"
Minimum Clearances Required to
Combustible Materials
MODELS SUPPLY AIR DUCT
FIRST THREE FEET CABINET
H42A, L / H48A, L
H60A, L 1/4" 0"
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.
INSTALLATION INSTRUCTIONS
WARNING
Failure to provide the 1/4 inch clearance
between the supply duct and a combustible
surface for the rst 3 feet of duct can result in
re causing damage, injury or death.
WALL MOUNTING INFORMATION
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.
MOUNTING THE UNIT
1. These units are secured by wall mounting brackets
which secure the unit to the outside wall surface at
both sides. A bottom mounting bracket, attached
to skid for shipping, is provided for ease of
installation, but is not required.
2. The unit itself is suitable for 0 inch clearance,
but the supply air duct ange and the rst 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.
3. Locate and mark lag bolt locations and bottom
mounting bracket location. See Figure 2.
4. Mount bottom mounting bracket.
5. Hook top rain ashing, attached to front - right of
supply ange for shipping, under back bend of top.
6. Position unit in opening and secure with 5/16 lag
bolts; use 7/8 inch diameter at washers on the lag
bolts.
7. Secure rain ashing to wall and caulk across entire
length of top. See Figure 2.
8. For additional mounting rigidity, the return air
and supply air frames or collars can be drilled
and screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
9. On side-by-side installations, maintain a minimum
of 20 inches clearance on right side to allow access
to control panel and heat strips, and to allow proper
airow to the outdoor coil. Additional clearance
may be required to meet local or national codes.

Manual 2100-585A
Page 7 of 19
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 airow in the full open position instead
of the 100% airow when standard 16" is used. Economizers not used with HA4-5S 2-Stage models.
Dimensions of Basic Unit for Architecural & Installation Requirements (Nominal)
NOTE 1: Not used when ECONWMT Economizer installed. Filter access is through the ECONWMT hood.
Low Voltage
4° Pitch
(Lockable)
Entrance
Entrance
Electrical
Cond.
Air
Inlet
Panel
Access
Heater
Built In
Rain Hood
Disconnect
Access Panel
C. Breaker/
High Voltage
Electrical
Drain
Side View
I
J
D
A
CH
2.13
K
11"
Economizer
Air Intake Hood
Brackets
Shipping
Location
Supply Air Opening
Return Air Opening
Electrical
Optional
(Built In)
Entrances
Mounting
Side Wall
Top Rain
Flashing
Bottom Installation
Bracket
Back View
M
L
O
E
R
S
S
S
S
S
T
NQ
B
P
.44
1
MIS-3210
Electric
Heat
Air Outlet
Front View
Filter Access Panel
Condenser
Ventilation Air
5.88
F
W
G
Standard
flush vent
door for
non-Econ.
models
NOTE 1: Not used when ECONWMT Economizer installed. Filter access is through the ECONWMT hood.
K
A
I
C
2.13
B
L
N
H
M
S
J
O
E
.44 W
5.88
F
G
R
S
D
S
P
S
T
11"
Q
S
1
Low Voltage
Electric
Inlet
Bracket
Brackets
Installation
Heater
Condenser
Top Rain
Disconnect
Side View
Air
Heat
Entrance
(Lockable)
Electrical
Air Outlet
Front View
Side Wall
Optional
Back View
Bottom
Filter Access Panel
Access
Supply Air Opening
Panel
Return Air Opening
Cond.
MIS-3211
Mounting
(Built In)
Drain
Access Panel
Flashing
Location
Shipping
Entrance
Entrances
Electrical
Electrical
High Voltage
C. Breaker/
Built In
Rain Hood
4° Pitch
Ventilation Air
Standard flush
vent door for
non-Econ.
models
Economizer
Air Intake Hood
FIGURE 1
All dimensions are in inches. Dimensional drawings are not to scale.
H**A
RIGHT
UNIT
H**L
LEFT
UNIT
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

Manual 2100-585A
Page 8 of 19
FIGURE 2
H42A2, H42L2, H48A2, H48L2, H60A2, H60L2
MOUNTING INSTRUCTIONS
D
16" 16" 16" 16" 16"
17
8"61
2" 61
2"21
8"
7 8"
1" 3"
4"
Typ.
4"
Typ.
61
2"30"
E
16"
A CC
31
8"
B
Wall Opening and Hole Location View
RETURN AIR
1
REQUIRED DIMENSIONS TO MAINTAIN
1/4" MIN. CLEARANCE FROM
COMBUSTIBLE MATERIALS
REQUIRED DIMENSIONS TO MAINTAIN 29
DUCT
COMBUSTIBLE MATERIALS
A B C DE
30 1/2 10 1/2 6 1/4 1 1/4 29 3/4
32 12 5 1/2 2
NOTES:
WALL STRUCTURE
1
SUPPLY AIR
IT IS RECOMMENDED THAT A BEADOF
OPENING
Right Side View
RAIN FLASHING
SILICONE CAULKING BE PLACED BEHIND
RECOMMENDED 1" CLEARANCE FROM
THE SIDE MOUNTING FLANGES AND UNDER TOP FLASHING AT TIME OFINSTALLATION.
TOP.
PANEL
HEATER ACCESS
FOUR SIDES OFSUPPLY
AIRDUCTIS REQUIRED
FROM COMBUSTABLE
WALL 1/4" CLEARANCE ONALL
MATERIALS
Supply Opening
FOAMAIRSEAL
SUPPLIED
SEAL WITH BEAD
OF CAULKING ALONG
ENTIRE LENGTH OF
TOP
1
Return Opening
MIS-416 E
Dimension is 21" on 95" tall units.
2
Dimension is 10" on T48H1 & T60H1.
2
Dimension is 6" on T48H1 & T60H1.
3
3
" "

Manual 2100-585A
Page 9 of 19
FIGURE 3
ELECTRIC HEAT CLEARANCE
H42A2, H42L2, H48A2, H48L2, H60A2, H60L2
WARNING
A minimum of 1/4 inch clearance must be maintained between
the supply air duct and combustible materials. This is required for
the rst 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 re causing damage, injury or death.
NOTE 1: SIDE SECTION VIEW OF SUPPLY AIR
DUCT FOR WALL MOUNTED UNIT SHOWING 1/4
INCH CLEARANCE TO COMBUSTIBLE SURFACES.

Manual 2100-585A
Page 10 of 19
FIGURE 4
WALL MOUNTING INSTRUCTIONS
FIGURE 5
WALL MOUNTING INSTRUCTIONS
DUCT
OPENING
RETURN AIR
SUPPLY AIR
WOOD FRAME WALL INSTALLATION
OPENING
WALL BEFORE
MOUNT ON UNIT
OPENING
BEFORE INSTALLATION
BOTTOM MOUNTING
CONCRETE BLOCK WALL INSTALLATION
BRACKET. MOUNT ON
OPENING
WOOD OR STEELSIDING
OPENING
INSTALLING UNIT.
RETURN AIR
WALL STRUCTURE
RETURN AIR
SUPPLY AIR
FACTORY SUPPLIED
RAIN FLASHING.
SUPPLY AIR
MIS-548 A
SIDE VIEW
I
A
C
K
E + 1.000
B
1.000
SUPPLY DUCT
OVER FRAME
INTERIOR FINISHED WALL
ALL AROUND DUCT
FRAMING MATERIAL
EXTERIOR FINISH WALL
OPENING
FOR ACTUAL DIMENSIONS.
2 x 4'S, 2 x 6'S &/OR
STRUCTURAL STEEL
ATTACH TO TOP
1.000" CLEARANCE
1.000" CLEARANCE
PLATE OF WALL
C
SEE UNIT DIMENSIONS, FIGURE 2,
OPENING
RETURN DUCT
2 x 6
ATTACH TO BOTTOM
OVER FRAME
PLATE OF WALL
L
THIS STRUCTURAL MEMBER
LOCATED TO MATCH STUD
SPACING FOR REST OF WALL.
A SECOND MEMBER MAY BE
REQUIRED FOR SOME WALLS.
MIS-549 B
ALL AROUND DUCT
SEE FIGURE 3 – MOUNTING INSTRUCTIONS

Manual 2100-585A
Page 11 of 19
FIGURE 6
COMMON WALL MOUNTING INSTALLATIONS
LOWERED
RAISED FLOOR
RAFTERS
SUPPLY AIR
CEILING SURFACE
WALL SLEEVE
RETURN AIR
CLOSET WALL
GRILLE
FLASHING
RETURN AIR
FLASHING
SUPPLY DUCT MAYBE LOCATED INANATTIC
OR BELOW CEILING RAFTERS AS SHOWN
SUPPLY DUCT MAY BE LOCATED INANATTIC
SURFACE
RAFTERS
FINISHED CEILING
SUPPLY AIRDUCT
WALL
OPENING W/ GRILLE
SUPPLY DUCT MAYBE LOCATED INANATTIC
OR BELOW CEILING RAFTERS AS SHOWN
CEILING
RAIN
RETURN AIR
SLEEVE
WALL
SUPPLY AIRDUCT
RAFTERS
RAFTERS
RETURN AIR
OPENING W/ GRILLE
RAIN
FALSE WALL INSTALLATION
DUCTED SUPPLY
GRILLE
OUTSIDE
SPACE
FALSE WALL
RETURN AIR GRILLE
OUTSIDE
OR BELOW CEILING RAFTERS AS SHOWN
FINISHED CEILING SURFACE
RAIN
FLASHING
RAIN
FLASHING
RETURN AT UNITNO DUCT
WALL
SUPPLY AIRDUCT
CLOSETINSTALLATION
RETURN AIR
FINISHED
FINISHED CEILING SURFACE
MIS-550 B
FREE AIR FLOW
OUTSIDE
WALL
OUTSIDE
WALL
SUPPLY AIRDUCT
W/ GRILLE

Manual 2100-585A
Page 12 of 19
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information
and maximum fuse or “HACR” type circuit breaker size.
Each outdoor unit is marked with a “Minimum Circuit
Ampacity”. This means that the eld wiring used must be
sized to carry that amount of current. Depending on the
installed KW of electric heat, there may be two eld power
circuits required. If this is the case, the unit serial plate will
so indicate. All models are suitable only for connection
with copper wire. Each unit and/or wiring diagram will be
marked “Use Copper Conductors Only”. These instructions
must be adhered to. Refer to the National Electrical Code
(NEC) for complete current carrying capacity data on the
various insulation grades of wiring material. All wiring
must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75° C copper)
for all models including the most commonly used heater
sizes. Also shown are the number of eld power circuits
required for the various models with heaters.
The unit rating plate lists a “Maximum Time Delay
Relay Fuse” or “HACR” type circuit breaker that is to
be used with the equipment. The correct size must be
used for proper circuit protection and also to assure that
there will be no nuisance tripping due to the momentary
high starting current of the compressor motor.
The disconnect access door on this unit may be locked
to prevent unauthorized access to the disconnect. To
convert for the locking capability, bend the tab located
in the bottom left-hand corner of the disconnect
opening under the disconnect access panel straight
out. This tab will now line up with the slot in the door.
When shut, a padlock may be placed through the hole
in the tab preventing entry.
See “Start Up” section for important information on
three phase scroll compressor start ups.
See Tables 3 & 4 for Electrical Specications.
Low Voltage Connection
These units use a 24-volt AC low voltage circuit. The
“RT” terminal is the 24V transformer output, and the
“R” terminal is the 24VAC hot terminal for the operation
of the equipment. “RT” and “R” are connected with
brass jumper bar which can be removed and “RT” and
“R” connected to external NC (normally closed) contact
such as a re/smoke detector that will cause immediate
shutdown of the equipment upon activation.
“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 lter 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.
WIRING – LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary
voltage transformers. All equipment leaves the factory
wired on 240V tap. For 208V operation, reconnect
from 240V to 208V tap. The acceptable operating
voltage range for the 240 and 208V taps are:
TAP RANGE
240 253 – 216
208 220 – 187
NOTE: Thevoltageshouldbemeasuredattheeld
power connection point in the unit and while
the unit is operating at full load (maximum
amperage operating condition).
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 lter 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.
MIS-3054
TIMER TO BE
SET HERE

MIS-3054

Manual 2100-585A
Page 13 of 19
START UP
THESE UNITS REQUIRE R-410A
REFRIGERANTAND 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. UsemanifoldgaugesratedforR-410A(800psi/250
psi low).
4. R-410A is a binary blend of HFC-32 and HFC-125.
5. R-410A is nearly azeotropic - similar to R-22 and
R-12. Although nearly azeotropic, charge with
liquid refrigerant.
6. R-410A operates at 40-70% higher pressure than
R-22, and systems designed for R-22 cannot
withstand this higher pressure.
7. R-410A has an ozone depletion potential of zero,
but must be reclaimed due to its global warming
potential.
8. R-410A compressors use Polyol Ester oil.
9. Polyol Ester oil is hygroscopic; it will rapidly
absorb moisture and strongly hold this moisture in
the oil.
10. A liquid line dryer must be used - even a deep
vacuum will not separate moisture from the oil.
11. Limit atmospheric exposure to 15 minutes.
12. If compressor removal is necessary, always plug
compressor immediately after removal. Purge with
small amount of nitrogen when inserting plugs.
TOPPING OFF SYSTEM CHARGE
If a leak has occurred in the system, Bard
Manufacturing recommends reclaiming, evacuating
(see criteria above), and charging to the nameplate
charge. If done correctly, topping off the system charge
can be done without problems.
With R-410A, there are no signicant 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.
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. Useglovesandsafetyglasses,PolyolEsteroilscan
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 ammable.
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 ll cylinders over 80% of total capacity.
8. Store cylinders in a cool area, out of direct
sunlight.
9. Never heat cylinders above 125°F.
10. Never trap liquid R-410A in manifold sets, gauge
lines or cylinders. R-410A expands signicantly
at warmer temperatures. Once a cylinder or line is
full of liquid, any further rise in temperature will
cause it to burst.
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.
WARNING
Failure to conform to these practices
could lead to damage, injury or death.

Manual 2100-585A
Page 14 of 19
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
lters at all times. Also, not to needlessly close off
supply and return air registers. This reduces airow
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 airow 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.
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xedbyspecic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.

Manual 2100-585A
Page 15 of 19
TROUBLESHOOTING
FIGURE 7
FAN BLADE SETTING
TABLE 1
FAN BLADE DIMENSION
R-410A
REFRIGERANT CHARGE
This unit was charged at the factory with the quantity of
refrigerant listed on the serial plate. AHRI capacity and
efciency ratings were determined by testing with this
refrigerant charge quantity.
The following pressure tables show nominal pressures
for the units. Since many installation specic situations
can affect the pressure readings, this information should
only be used by certied 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.
2. Remove the screws holding both grilles, one on
each side of unit, and remove grilles.
3. Remove screws holding fan shroud to condenser
and bottom. Nine (9) screws.
4. Unwire condenser fan motor.
5. Slide complete motor, fan blade, and shroud
assembly out the left side of the unit.
6. Service motor/fan as needed.
7. Reverse steps to reinstall.
Model Dimension
A
H42A2 / H42L2
H48A2 / H48L2
H60A2 / H60L2 1.75"
"A"
AIRFLOW
MIS-1724
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 specic 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.

Manual 2100-585A
Page 16 of 19
TABLE 2
COOLING PRESSURE TABLE
Air Temperature Entering Outdoor Coil °F
Low side pressure ± 4 PSIG
High side pressure ± 10 PSIG
Tables are based upon rated CFM (airow) 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”.
Model Return Air Temp
(DB/WB) Pressure 75 80 85 90 95 100 105 110 115 120
H42A/L
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
H48A/L
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
H60A/L
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

Manual 2100-585A
Page 17 of 19
TABLE 3
Electrical Specications 1-Stage Compressor Models
MODEL Rated Volts &
Phase
No.
Field
Power
Circuits
Single Circuit Dual Circuit
l
Minimum
Circuit
Ampacity
j
Maximum
External
Fuse or
Ckt. Brkr.
k
Field
Power
Wire
Size
k
Ground
Wire
l
Minimum
Circuit
Ampacity
jMaximum
External
Fuse or Ckt.
Breaker
k
Field Power
Wire Size
k
Ground Wire
Size
Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B
H42A2-A00, A0Z
H42L2 A05
A10
A15
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
H48A2-A00, A0Z
H48L2 A05
A10
A15
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
H60A2-A00, A0Z
H60L2 A05
A10
A15
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
j Maximum size of the time delay fuse or HACR type circuit breaker for protection of eld wiring conductors.
kBased on 75C copper wire. All wiring must conform to the National Electrical Code and all local codes.
l These “Minimum Circuit Ampacity” values are to be used for sizing the eld power conductors. Refer to the National Electrical code (latest version),
Article 310 for power conductor sizing.
Caution: When more than one eld power circuit is run through one conduit, the conductors must be derated. Pay special attention to note 8 of Table 310
regardingAmpacity 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.

Manual 2100-585A
Page 18 of 19
TABLE 4
RECOMMENDED AIRFLOW
TABLE 5
INDOOR BLOWER PERFORMANCE
TABLE 6
ELECTRIC HEAT
Speed H42/48 H60
High Low High Low
ESP
(Inch H20) Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil Dry 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
Model Rated
CFM * Rated ESP * Recommended Airow 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
Models 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
* Rated CFM and ESP on high speed tap.

Manual 2100-585A
Page 19 of 19
TABLE 7
OPTIONAL ACCESSORIES
TABLE 8
VENT & CONTROL OPTIONS
H42, H48, H60
N/A 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
Factory Installed
Option Number
Field Installed
Part Number
H42A2-A H48A2-A H60A2-A
EHWA05-A05 X X
EHWA05-A10 X X X
EHWA05-A15 X X X
WMCB-08A X X
HEATER KITS
CIRCUIT
BREAKER
(WMCB) & PULL
DISCONNECT
(WMPD)