Bard H24AA-A, H42AA-A, H48AA-A, H60AA-A, H36AA-A Installation Instructions Manual
...
INSTALLATION INSTRUCTIONS
WALL-MOUNTED PACKAGED
AIR CONDITIONER
Models:
H24AA-A
H36AA-A
H42AA-A
H48AA-A
H60AA-A
H24LA-A
H36LA-A
H42LA-A
H48LA-A
H60LA-A
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 2100-647
Supersedes: NEW
Date: 9-3-15
Page 1 of 28
CONTENTS
Getting Other Information and Publications .... 3
Wall Mount General Information .........................4
Air Conditioner Wall Mount Model Nomenclature ....... 4
Shipping Damage ................................................... 4
General .................................................................. 4
Duct Work .............................................................. 5
Filters .................................................................... 5
Condensate Drain .................................................. 5
Installation ............................................................... 6
Wall Mounting Information ...................................... 6
Mounting the Unit .................................................. 6
Minimum Clearances .............................................. 6
Clearances Required ............................................... 6
Wiring – Main Power ............................................. 13
Wiring – Low Voltage Wiring ................................... 14
Dirty Filter Switch and Relay .................................. 14
Economizer Fail Time Delay Relay .......................... 14
Start Up ................................................................... 15
General ................................................................ 15
Topping Off System Charge .................................... 15
Safety Practices.................................................... 15
Important Installer Note ........................................ 15
High Pressure and Low Pressure Switches ............... 16
Condenser Fan Operation ...................................... 16
Service Hints........................................................ 16
Sequence of Operation .......................................... 16
Compressor Control Module ................................... 16
Pressure Service Ports ........................................... 17
Service ..................................................................... 18
Fan Blade Setting Dimensions ............................... 18
Removal of Fan Shroud ......................................... 18
R410A Refrigerant Charge ..................................... 18
Figures
Figure 1 Unit Dimensions .................................. 7
Figure 2A H24 Mounting Instructions ................... 8
Figure 2B H36 Mounting Instructions ................... 9
Figure 2C H42, 48, 60 Mounting Instructions ..... 10
Figure 3 Electric Heat Clearance ...................... 11
Figure 4 Wall Mounting Instructions ................. 12
Figure 5 Wall Mounting Instructions ................. 12
Figure 6 Common Wall Mounting Installations ... 13
Figure 7 Fan Blade Setting .............................. 18
Figure 8A H***A Wiring Diagram – Top ............... 26
Figure 8B H***A Wiring Diagram – Bottom .......... 27
Figure 9 H***A Low Voltage Diagram for Unit
and MV Connections ........................... 28
Tables
Table 1 Sequence of Operation ....................... 17
Table 2 Fan Blade Dimension ......................... 18
Table 3 Cooling Pressure ................................ 19
Table 4A Electrical Specifications H**A Series ... 20
Table 4B Electrical Specifications H**L Series ... 20
Table 5 Recommended Airflow ........................ 21
Table 6 Indoor Blower Performance ................. 21
Table 7 Max ESP of Operation Elec Heat Only .. 21
Table 8 Electric Heat ..................................... 21
Table 9 Optional Accessories .......................... 22
Table 10 Vent and Control Options .................... 22
Table 11 Unit Low Voltage Terminal Connection
Chart – MV Series Controller ............... 23
Table 12 Unit Low Voltage Terminal Connection
Chart – MC Series Controller ............... 24
Table 13 Unit Low Voltage Terminal Connection
Chart – Cooling/Heating Thermostat ..... 25
Manual 2100-647
Page 2 of 28
GETTING OTHER INFORMATION AND PUBLICATIONS
These publications can help when installing the
furnace. They can usually be found at the local library
or purchased directly from the publisher. Be sure to
consult the current edition of each standard.
National Electrical Code ...................... ANSI/NFPA 70
Standard for the Installation ..............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
Manual 2100-647
Page 3 of 28
WALL MOUNT GENERAL INFORMATION
AIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE
H 42 A 4 – A 05 Y P X X X J
MODEL SERIES
CAPACITY
24 – 2 Ton
36 – 3 Ton
42 – 3½ Ton
48 – 4 Ton
60 – 5 Ton
A – Right Hand Air Conditioner
L – Left Hand Air Conditioner
!
WARNING
REVISIONS
VOLTS & PHASE
A – 230/208/60/1
VENTILATION OPTIONS
B – Blank-Off Plate (No Ventilation)
Y – 100% Economizer Temperature
Z – 100% Economizer Enthalpy
Electrical shock hazard.
Have a properly trained individual perform
these tasks.
Failure to do so could result in electric shock
or death.
KW
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
!
CAUTION
X – Standard
1 – Phenolic Coated Evaporator
2 – Phenolic Coated Condenser
3 – Phenolic Coated Evaporator
and Condenser
OUTLET OPTIONS
X – Front (Standard)
Cut hazard.
Wear gloves to avoid contact with sharp
edges.
Failure to do so could result in personal injury.
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.
Manual 2100-647
Page 4 of 28
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.
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 the H Model Series 36-60, a 1/4" clearance to
combustible material for the first 3' of duct attached
to the outlet air frame is required. See Wall Mounting
Instructions and Figures 2A-C and Figure 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" 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.
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".
Any grille that meets with 5/8" louver criteria may
be used. It is recommended that Bard Return Air
Grille Kit RG2W thru RG5W or RFG2W thru RFG5W
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.
Manual 2100-647
Page 5 of 28
INSTALLATION
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 clearance, but the
supply air duct flange and the first 3' of supply
air duct require a minimum of 1/4" clearance
to combustible material for Model Series H36,
H42, H48 and H60. However, it is generally
recommended that a 1" clearance is used for
ease of installation and maintaining the required
clearance to combustible material. See Figures
2A-C for details on opening sizes.
Clearances Required for Service Access and
Adequate Condenser Airflow
LEFT
MODELS
H24A, H36A 15" 20" 10'
H24L, H36L 20" 15" 10'
H42A, H48A, H60A 20" 20" 10'
H42L, H48L, H60L 20" 20" 10'
NOTE: For side-by-side installation of two 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 H**A (right side compressor and
controls) for right unit.
SIDE
RIGHT
SIDE
3. Locate and mark lag bolt locations and bottom
mounting bracket location (see Figure 2).
4. Mount bottom mounting bracket.
5. Hook top rain flashing, attached to front-right
corner of supply flange for shipping, under back
bend of top.
Position unit in opening and secure with fasteners
6.
sufficient for the application such as 5/16 lag bolts;
use 7/8" diameter flat washers on the lag bolts.
7. Secure rain flashing to wall and caulk across entire
length of top (see Figure 2).
DISCHARGE
SIDE
Minimum Clearances Required to
Combustible Materials
MODELS
H24A, H24L 0" 0"
H36A, H36L 1/4" 0"
H42A, H42L
H48A, H48L
H60A, H60L
!
WARNING
Failure to provide the 1/4" clearance
between the supply duct and a combustible
surface for the rst 3' of duct can result in
re causing damage, injury or death.
SUPPLY AIR DUCT
FIRST 3'
1/4" 0"
CABINET
8. For additional mounting rigidity, the return air
and supply air frames or collars can be drilled
and screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
9. On side-by-side installations, maintain a minimum
of 20" clearance on right side to allow access to
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.
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 airflow 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.
Manual 2100-647
Page 6 of 28
H60A, L
FIGURE 1
Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)
WIDTH
DEPTH
MODEL
H24A, L 33.300 17.125 74.563 7.88 19.88 11.88 19.88 35.00 10.88 29.75 20.56 30.75 32.06 33.25 31.00 2.63 34.13 26.06 10.55 4.19 12.00 9.00
H36A, L 38.200 17.125 74.563 7.88 27.88 13.88 27.88 40.00 10.88 29.75 17.93 30.75 32.75 33.25 31.00 2.75 39.13 26.75 9.14 4.19 12.00 9.00
H42A, L
H48A, L
H60A, L 42.075 22.432 93.000 9.88 29.88 15.88 29.88 43.88 13.56 37.00 30.00 40.81 35.06 42.81 40.56 3.37 43.00 31.00 10.00 1.44 16.00 10.00
(W)
42.075 22.432 84.875 9.88 29.88 15.88 29.88 43.88 13.56 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
HEIGHT
(D)
All dimensions are in inches. Dimensional drawings are not to scale.
SUPPLY RETURN
(H)
A B C B E F G I J K L M N O P Q R S T
H**A
RIGHT
UNIT
5.88
Built In
Rain Hood
W
Filter Access Panel
F
G
Ventilation Air
Condenser
Economizer
1
Standard
flush vent
door for
non-Econ.
models
Air Outlet
4° Pitch
C. Breaker/
Disconnect
Access Panel
(Lockable)
Economizer
Air Intake Hood
Controls
7"
Low Voltage
High Voltage
Heater
Access
Panel
Electric
Heat
Electrical
Entrance
Electrical
Entrance
Front View
D
Cond.
Air
Inlet
Side View
J
Drain
2.13
Side Wall
A
Mounting
Brackets
(Built In)
I
Top Rain
Flashing
Shipping
Location
Optional
C
H
Electrical
Entrances
K
L
M
P
N
Q
Not used when EWM economizer is installed. Filter access is through the EWM hood.
Electric
Heat
Heater
Access
Panel
C. Breaker/
Disconnect
Access Panel
(Lockable)
Standard flush
vent door for
non-Econ.
models
Economizer
Air Intake Hood
Economizer
controls
(opposite side)
Low Voltage
Electrical
Entrance
High Voltage
Electrical
Entrance
7"
H**L
LEFT
UNIT
R
S
S
S
S
S
T
Drain
.44
Supply Air Opening
Return Air Opening
Bottom
Installation
Bracket
E
O
B
Back View
Built In
Rain Hood
4° Pitch
Side Wall
Mounting
Brackets
(Built In)
Top Rain
Flashing
Shipping
Location
Optional
Electrical
Entrances
P
Q
2.13
A
I
C
H
K
L
M
N
J
D
Cond.
Air
Inlet
Not used when EWM economizer is installed. Filter access is through the EWM hood.
E
O
Supply Air Opening
B
Return Air Opening
Back View
W
Filter Access Panel
Ventilation Air
Condenser
Air Outlet
Front ViewSide View
.44
Bottom Installation
Bracket
MIS-3624
1
5.88
MIS-3625
R
S
S
S
S
S
T
F
G
Manual 2100-647
Page 7 of 28
12"
12"
12"
12"
12"
20"
20"
1"
3"
4"
Typ.
8"
20
1
2
"
12"
1"
3
1
8
"
4"
Typ.
5"
7
8
"
3
13
16
"
2" 2"
7
1
16
" 7
1
16
"
NOTES:
RAIN FLASHING
RETURN AIR
HEATER ACCESS
ENTIRE LENGTH OF TOP.
TOP
WALL
OF CAULKING ALONG
PANEL
FOAM AIR SEAL
WALL STRUCTURE
OPENING
TOP FLASHING AT TIME OF INSTALLATION.
THE SIDE MOUNTING FLANGES AND UNDER
DUCT
Wall Opening and Hole Location View Right Side View
SEAL WITH BEAD
IT IS RECOMMENDED THAT A BEAD OF
SILICONE CAULKING BE PLACED BEHIND
SUPPLY AIR
SUPPLIED
Return Opening
Supply Opening
H**A UNIT SHOWN, H**L UNIT
CONTROLS AND HEATER ACCESS
IS ON OPPOSITE (LEFT) SIDE.
MIS-3658
FIGURE 2A
H24AA, H24LA Mounting Instructions
Manual 2100-647
Page 8 of 28
28"
A
C
D
C
12"
12"
12"
12"
12"
5
1
16
"
B
E
14"
4
11
16
" 4
11
16
"
4"
Typ.
2
7
8
"
7
8
"
7
8
"
4"
Typ.
7
8
"
3
1
8
"
SUPPLIED
H*A UNIT SHOWN, H*L UNIT
MIS-3659
SUPPLY AIR
ENTIRE LENGTH OF TOP.
TOP
OF CAULKING ALONG
PANEL
FOAM AIR SEAL
WALL STRUCTURE
RAIN FLASHING
FOUR SIDES OF SUPPLY
AIR DUCT IS REQUIRED
FROM COMBUSTABLE
MATERIALS
NOTES:
1/4" CLEARANCE ON ALL
HEATER ACCESS
TOP FLASHING AT TIME OF INSTALLATION.
THE SIDE MOUNTING FLANGES AND UNDER
SILICONE CAULKING BE PLACED BEHIND
IS ON OPPOSITE (LEFT) SIDE.
OPENING
CONTROLS AND HEATER ACCESS
DUCT
RETURN AIR
Right Side View
SEAL WITH BEAD
IT IS RECOMMENDED THAT A BEAD OF
WALL
Wall Opening and Hole Location View
Return Opening
16 7/84 7/164 5/89 7/829 7/8
17 5/83 11/165 3/88 3/8
28 3/8
EDCBA
COMBUSTIBLE MATERIALS
RECOMMENDED 1" CLEARANCE FROM
REQUIRED DIMENSIONS TO MAINTAIN
COMBUSTIBLE MATERIALS
1/4" MIN. CLEARANCE FROM
REQUIRED DIMENSIONS TO MAINTAIN
Supply Opening
FIGURE 2B
H36AA, H36LA Mounting Instructions
Manual 2100-647
Page 9 of 28
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