Bard H42A2-A, H48A2-A, H60A2-A, H42L2-A, H48L2-A Installation Instructions Manual

INSTALLATION INSTRUCTIONS

WALL MOUNTED PACKAGED

AIR CONDITIONERS

Models:

H42A2-A
H48A2-A
H60A2-A

H42L2-A
H48L2-A
H60L2-A

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506

www.bardhvac.com

Manual : 2100-585B
Supersedes: 2100-585A
Date: 10-09-14

Page 1 of 19

CONTENTS

Getting Other Information and Publications 3

Wall Mount General Information

Wall Mount Model Nomenclature
Shipping Damage

General ................................................................4

Duct Work ................................................................ 5

Filters ................................................................ 5

Condensate Drain

Installation Instructions

Wall Mounting Information
Mounting the Unit
Clearances Required
Minimum Clearances
Wiring – Main Power
Wiring – Low Voltage Wiring
Dirty Filter Switch & Relay
Economizer Fail Time Delay Relay

..................................................... 4

.................................................... 5

...................................................... 6

................................................ 6

................................................ 6

............................................... 12

.............................. 4

........................................ 6

................................... 12

...................................... 12

......................... 12

Start Up

General ..............................................................13

Topping Off System Charge
Safety Practices
Important Installer Note
High Pressure Switch
Condenser Fan Operation
Service Hints
Sequence of Operation
Compressor Control Module
Adjustments
Pressure Service Ports

Troubleshooting

Fan Blade Setting Dimensions
Refrigerant Charge
Removal of Fan Shroud

...................................................... 13

........................................................... 14

............................................................ 14

................................................. 15

.................................... 13

........................................... 13

.............................................. 13

...................................... 14

........................................... 14

................................... 14

........................................... 14

................................ 15

.......................................... 15

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

Manual 2100-585B
Page 2 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 of America
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 Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone]
Fax: [phone]

Manual 2100-585B
Page 3 of 19

WALL MOUNT GENERAL INFORMATION

AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE

H 42 A 2 – A 05 Y P X X X J

MODEL NUMBER

CAPACITY

42 - 3½ Ton
48 - 4 Ton
60 - 5 Ton

A - Right Hand Air Conditioner
L - Left Hand Air Conditioner

VENTILATION OPTIONS

B - Blank-off Plate (No Ventilation)
Y - 100% Economizer Temperature
Z - 100% Economizer Enthalpy

REVISIONS

KW

VOLTS & PHASE

A - 230/208/60/1

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.

CONTROL MODULES

(See Spec. Sheet)

COIL OPTIONS

COLOR OPTIONS

X - Beige (Standard)
1 - White
4 - Buckeye Gray
5 - Desert Brown
6 - Dark Bronze
A - Aluminum
S - Stainless Steel

FILTER OPTIONS

P - 2 inch Pleated MERV 8

X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator
and Condenser

OUTLET OPTIONS

X - Front (Standard)

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.

Manual 2100-585B
Page 4 of 19

DUCT WORK

FILTERS

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.

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.

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.

Manual 2100-585B
Page 5 of 19

INSTALLATION INSTRUCTIONS

WALL MOUNTING INFORMATION

1. Two holes for the supply and return air openings
must be cut through the wall as shown in Figure 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

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.

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.

10.

Care should be taken to ensure that the recirculation
and obstruction of condenser discharge air does not
occur. Recirculation of condenser discharge air
can be from either a single unit or multiple units.
Any object such as shrubbery, a building or other
large object can cause obstructions to the condenser

discharge air. Recirculation or reduced airow caused

by obstructions will result in reduced capacity,
possible unit pressure safety lockouts and reduced
unit service life.

For units with blow through condensers, it is

recommended there be a minimum distance of 10'
between the front of the unit and any barrier or 20'
between the fronts of two opposing (facing) units.

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"

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.

Manual 2100-585B
Page 6 of 19

Minimum Clearances Required to
Combustible Materials

MODELS

H42A, L / H48A, L
H60A, L

SUPPLY AIR DUCT

FIRST THREE FEET

1/4" 0"

CABINET

I

A

C

K

2.13

H

J

N

Q

P

M

L

O

E

.44

W

5.88

F

G

R

S

S

S

S

S

T

B

D

7"

Economizer
Air Intake Hood

1

Heat

Electric

Filter Access Panel

MIS-3625

Heater

Drain

Air

Air Outlet

Front View

Disconnect

Side View

Inlet

Panel

Access

Cond.

Top Rain

Condenser

Back View

models

Bottom

Installation

Bracket

Side Wall
Mounting
Brackets

Flashing
Shipping
Location

Optional
Electrical
Entrances

High Voltage
Electrical
Entrance

(Built In)

non-Econ.

Supply Air Opening

Return Air Opening

Standard flush

vent door for

Electrical

Low Voltage

Entrance

(Lockable)

Access Panel

C. Breaker/

Built In
Rain Hood
4° Pitch

Ventilation Air

Economizer
controls
(opposite side)

FIGURE 1

Dimensions of Basic Unit for Architecural & Installation Requirements (Nominal)

WIDTH

MODEL

H42A
H42L
H48A
H48L
H60A
H60L

DEPTH

(W)

(D)

42.075 22.432 84.875

All dimensions are in inches. Dimensional drawings are not to scale.

SUPPLY RETURN

HEIGHT

(H)

A B C B E F G I J K L M N O P Q R S T

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 1.88

H**A
RIGHT
UNIT

5.88

W

Filter Access Panel

F

G

Ventilation Air

Condenser

1

Economizer

Standard
flush vent
door for
non-Econ.
models

Air Outlet

Front View

Rain Hood

4° Pitch

Access

Electric

C. Breaker/
Disconnect

Access Panel

(Lockable)

Economizer
Air Intake Hood

Controls

7"

Low Voltage

Electrical
Entrance

High Voltage

Electrical
Entrance

Built In

Heater

Panel

Heat

D

Cond.

Air

Inlet

Side View

2.13

J

Drain

Side Wall

A

Mounting

Brackets

(Built In)

I

Top Rain

Flashing
Shipping
Location

Optional

C

H

Electrical

Entrances

K

L

M

P

N

Supply Air Opening

Return Air Opening

Back View

Q

 Not used when EWM Economizer is installed. Filter access is through the EWM hood.

E
O

B

.44

Bottom Installation
Bracket

MIS-3624

R

S

S

S

S

S

T

H**L
LEFT
UNIT

 Not used when EWM Economizer is installed. Filter access is through the EWM hood.

Manual 2100-585B
Page 7 of 19

D

16"

16"

16"

16"

16"

1

7

8

"

6

1

2

" 6

1

2

"

2

1

8

"

7

8

"

1"

3"

4"

Typ.

4"

Typ.

6

1

2

"

30"

E

16"

A CC

3

1

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 BEAD OF

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 OF INSTALLATION.

TOP.

PANEL

HEATER ACCESS

FOUR SIDES OF SUPPLY

AIR DUCT IS REQUIRED

FROM COMBUSTABLE

WALL

1/4" CLEARANCE ON ALL

MATERIALS

Supply Opening

FOAM AIR SEAL

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

FIGURE 2

Manual 2100-585B
Page 8 of 19

MOUNTING INSTRUCTIONS

H42A2, H42L2, H48A2, H48L2, H60A2, H60L2

"

"

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 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.

Manual 2100-585B
Page 9 of 19

FIGURE 4

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 STEEL SIDING

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

WALL MOUNTING INSTRUCTIONS

SEE FIGURE 3 – MOUNTING INSTRUCTIONS

FIGURE 5

WALL MOUNTING INSTRUCTIONS

Manual 2100-585B
Page 10 of 19

FIGURE 6

COMMON WALL MOUNTING INSTALLATIONS

SUPPLY DUCT MAY BE LOCATED IN AN ATTIC

OR BELOW CEI LI NG RAFTERS AS SHOWN

RAIN

FLASHING

OUTSI DE

WALL

RAIN

FLASHING

RAFTERS

FINISHED CEI LI NG SURFACE

SUPPLY AIR DUCT
W/ GRILLE

RETURN AI R
OPENI NG W/ GRILLE

FREE AIR FLOW

NO DUCT

SUPPLY DUCT MAYBE LOCATED IN AN ATTIC

OR BELOW CEI LI NG RAFTERS AS SHOWN

RAFTERS

RAIN

FLASHING

OUTSI DE

WALL

RAIN

FLASHING

RAFTERS

SUPPLY AIR DUCT

FINISHED CEI LI NG SURFACE

RETURN AI R
OPENI NG W/ GRILLE

DUCTED SUPPLY

RETURN AT UNIT

SUPPLY DUCT MAYBE LOCATED IN AN ATTIC

OR BELOW CEI LI NG RAFTERS AS SHOWN

RAFTERS

SUPPLY AIR DUCT

OUTSI DE

WALL

FALSE WALL INSTALLATION

FINISHED
CEILING SURFACE

RETURN AI R

SPACE

WALL SLEEVE

FALSE WALL

RETURN AI R GRI LLE

OUTSI DE

WALL

SUPPLY AIR DUCT

LOWERED
CEILING

CLOSET WALL

WALL

SLEEVE

RAISED FLOOR

RETURN AI R

SUPPLY AIR

GRILLE

FINISHED CEI LI NG

CLOSET INSTALLATION

Manual 2100-585B
Page 11 of 19

SURFACE

RETURN AI R
GRILLE

MIS-550 C

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 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 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 EWM-T 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 EWM-T 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 Y or Z vent option economizers,
refer to the MV4000 Series Lead/Lag Controller manual
2100-571 for low voltage connections diagrams.
Factory installed Y and Z vent option are wired per
Figure 7 of 2100-571.

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.

TIMER TO BE
SET HERE



MIS-3054

Manual 2100-585B
Page 12 of 19

START UP

THESE UNITS REQUIRE R-410A
REFRIGERANT AND POLYOL
ESTER OIL.

GENERAL:

1. Use separate service equipment to avoid cross
contamination of oil and refrigerants.

2. Use recovery equipment rated for R-410A
refrigerant.

3. Use manifold gauges rated for R-410A (800 psi/250
psi low).

4. R-410A is a binary blend of HFC-32 and HFC-125.

5. R-410A is nearly azeotropic - similar to R-22 and
R-12. Although nearly azeotropic, charge with
liquid refrigerant.

6. R-410A operates at 40-70% higher pressure than
R-22, and systems designed for R-22 cannot
withstand this higher pressure.

7. R-410A has an ozone depletion potential of zero,
but must be reclaimed due to its global warming
potential.

8. R-410A compressors use Polyol Ester oil.

9. Polyol Ester oil is hygroscopic; it will rapidly
absorb moisture and strongly hold this moisture in
the oil.

10. A liquid line dryer must be used - even a deep
vacuum will not separate moisture from the oil.

11. Limit atmospheric exposure to 15 minutes.

12. If compressor removal is necessary, always plug
compressor immediately after removal. Purge with
small amount of nitrogen when inserting plugs.

TOPPING OFF SYSTEM CHARGE

If a leak has occurred in the system, Bard
Manufacturing recommends reclaiming, evacuating
(see criteria above), and charging to the nameplate
charge. If done correctly, topping off the system charge
can be done without problems.

With R-410A, there are no 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.

WARNING

Failure to conform to these practices
could lead to damage, injury or death.

SAFETY PRACTICES:

1. Never mix R-410A with other refrigerants.

2. Use gloves and safety glasses, Polyol Ester oils can
be irritating to the skin, and liquid refrigerant will
freeze the skin.

3. Never use air and R-410A to leak check; the

mixture may become 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.

Manual 2100-585B
Page 13 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.

Manual 2100-585B
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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.

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 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.

FIGURE 7

FAN BLADE SETTING

AIRFLOW

"A"

MIS-1724

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.

TABLE 1

FAN BLADE DIMENSION

Model

H42A2 / H42L2
H48A2 / H48L2
H60A2 / H60L2

6. Service motor/fan as needed.

7. Reverse steps to reinstall.

Dimension

A

1.75"

Manual 2100-585B
Page 15 of 19

TABLE 2

COOLING PRESSURE TABLE

Air Temperature Entering Outdoor Coil °F

Model

H42A/L

H48A/L

H60A/L

Return Air Temp

(DB/WB)

75° DB

62° WB

80° DB

67° WB

85° DB

72° WB

75° DB

62° WB

80° DB

67° WB

85° DB

72° WB

75° DB

62° WB

80° DB

67° WB

85° DB

72° WB

Pressure 75 80 85 90 95 100 105 110 115 120

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

123
320

132
328

137
339

117
355

125
364

129
377

122
346

131
355

136
367

124
342

133
351

138
363

119
378

127
388

131
402

124
371

133
380

138
393

126
367

135
376

140
389

121
403

129
413

134
427

126
396

135
406

140
420

128
391

137
401

142
415

123
427

132
438

137
453

128
421

137
432

142
447

130
416

139
427

144
442

125
454

134
466

139
482

130
447

139
458

144
474

132
443

141
454

146
470

127
482

136
494

141
511

131
473

140
485

145
502

134
469

143
481

148
498

129
510

138
523

143
541

133
499

142
512

147
530

136
496

145
509

150
527

131
539

140
553

145
572

135
526

144
539

149
558

137
526

147
539

152
558

133
570

142
585

147
605

137
553

146
567

151
587

139
554

149
568

154
588

135
603

144
618

149
640

138
580

148
595

153
616

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”.

Manual 2100-585B
Page 16 of 19

TABLE 3

Electrical Specications 1-Stage Compressor Models

Single Circuit Dual 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

230/208-1

230/208-1

230/208-1

No.

Field

Power

Circuits

1
1
1

1 or 2

1
1
1

1 or 2

1
1
1

1 or 2

l

Minimum

Circuit

Ampacity

32
32
58
84

39
39
58
84

42
42
60
86



Maximum

External

Fuse or

Ckt. Brkr.

50
50
60
90

50
50
60
90

60
60
60
90

k

Field

Power

Wire

Size

8
8
6
4

8
8
6
4

8
8
6
3

k

Ground

Wire

10
10
10

8 58 26 60 30 6 10 10 10

10
10
10

8 58 26 60 30 6 10 10 10

10
10
10

8 60 26 60 30 6 10 10 10

l

Minimum

Circuit

Ampacity

Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B

 Maximum size of the time delay fuse or circuit breaker for protection of eld wiring conductors.
k Based 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
regarding Ampacity Adjustment Factors when more than three (3) current carrying conductors are in a raceway.

 Maximum

External

Fuse or Ckt.

Breaker

k

Field Power

Wire Size

k

Ground Wire

Size

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 2100-585B
Page 17 of 19

TABLE 4

RECOMMENDED AIRFLOW

Model

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.

Rated

CFM *

Rated
ESP *

Recommended

Airow Range

Factory Speed

Connection

TABLE 5

INDOOR BLOWER PERFORMANCE

Speed

ESP

(Inch H20)

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

High Low High Low

Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil Dry Coil Wet Coil

H42/48 H60

Manual 2100-585B
Page 18 of 19

TABLE 6

ELECTRIC HEAT

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

TABLE 7

OPTIONAL ACCESSORIES

H42A2-A

EHWA05-A05 X X

EHWA05-A10 X X X

HEATER KITS

EHWA05-A15 X X X

H48A2-A

H60A2-A

Factory Installed

Option Number

N/A CMC-15 Start Kit (230V 1-Phase) X

B BOP-5 Blank Off Plate X

Y EWM5-T* 100% Economizer Temperature X

Z EWM5-E* 100% Economizer Enthalpy X

F N/A 100% Economizer DC Temperature X

G N/A 100% Economizer DC Enthalpy X

WMCB-08A X X

CIRCUIT

BREAKER

(WMPD)

DISCONNECT

(WMCB) & PULL

TABLE 8

VENT & CONTROL OPTIONS

Field Installed

Part Number

H42, H48, H60

Manual 2100-585B
Page 19 of 19