X - Barometric Fresh Air Damper (Standard)
B - Blank-off Plate
M - Motorized Fresh Air Damper
V - Commercial Ventilator - Motorized with Exhaust
E - Economizer (Internal) - Fully Modulating with Exhaust
R - Energy Recovery Ventilator - Motorized with Exhaust
(See Spec. Sheet S3398)
A - Manual Fresh Air Damper
H - Commercial Ventilator - Motorized with Exhaust
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.
X - Beige (Standard)
1 - White
4 - Buckeye Gray
5 - Desert Brown
8 - Dark Bronze
FILTER OPTIONS
X - One Inch Throwaway (Standard)
W - One Inch Washable
P - Two Inch Pleated
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.
CONTROL MODULES
(See Spec. Sheets
S3416 & S3417)
COIL OPTIONS
X - Standard
1 - Phenolic Coated Evaporator
2 - Phenolic Coated Condenser
3 - Phenolic Coated Evaporator
and Condenser
While these instructions are intended as a general
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.
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/gain 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 2100-527H
Page 4 of 29
DUCT WORK
All duct work, supply and return, must be properly
sized for the design airow 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.
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.
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
3A, 3B and 4 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.
FILTERS
A 1-inch throwaway lter 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. A 1-inch washable lter and
2-inch pleated lter are also available as optional
accessories. The internal lter brackets are adjustable
to accommodate the 2-inch lter by bending two (2)
tabs down on each side of the lter support bracket.
FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in
the service door.
If the unit is equipped with a fresh air damper assembly,
the assembly is shipped already attached to the unit.
The damper blade is locked in the closed position.
To allow the damper to operate, the maximum and
minimum blade position stops must be installed. See
Figure 1.
All capacity, efciency and cost of operation
information is based upon the fresh air blank-off plate
in place and is recommended for maximum energy
efciency.
The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.
Any grille that meets with 5/8 inch louver criteria may be
used. It is recommended that Bard Return Air Grille Kit
RG2 through RG5 or RFG2 through 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 sufcient 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.
FIGURE 1
FRESH AIR DAMPER
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 2100-527H
Page 5 of 29
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 3.
2. On wood frame walls, the wall construction must be
strong and rigid enough to carry the weight of the
unit without transmitting any unit vibration.
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. 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 3 for details on opening sizes.
3. Locate and mark lag bolt locations and bottom
mounting bracket location. See Figures 3A & 3B.
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 Figures 3A & 3B.
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.
PLACEMENT
1. 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
airow to the outdoor coil. Additional clearance
may be required to meet local or national codes.
2. 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 a large object can cause obstructions to the
condenser discharge air. Recirculation or reduced
airow caused by obstructions will result in reduced
capacity, possible unit pressure safety lockouts and
reduced unit service life.
Units with a blow through condenser, such as
the S**H 10 EER units, it is recommended that
a minimum distance of 15 feet between the front
of the unit and any barrier or 20 feet between the
fronts of two opposing (facing) units.
Units with a draw through condenser, such as the
W**H 10 EER units, it is recommended that a
minimum distance of 10 feet between the front of
the unit and any barrier or opposing (facing) unit.
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.
Clearances Required for Service Access
and Adequate Condenser Airow
MODELSLEFT SIDERIGHT SIDE
S26H, S31H
W26H, W31H
S38H, S43H, S49H, S61H
W38H, W43H, W49H, W61H
Manual 2100-527H
Page 6 of 29
15"20"
20"20"
Minimum Clearances Required to
Combustible Materials
MODELS
S26H, S31H
W26H, W31H
S38H, S43H, S49H, S61H
W38H, W43H, W49H, W61H
SUPPLY AIR
DUCT FIRST
THREE FEET
1/4"0
1/4"0
CABINET
Panel
Filter Access
Vent Option
Door
Ventilation
Air
Front View
5.75
F
W
G
Condenser
Air Inlet
MIS-2763
Rain Hood
(Lockable)
Built In
4° Pitch
Entrance
Disconnect
Access Panel
Electrical
Entrance
Low Voltage
Panel
Access
Heater
Heat
Electric
C. Breaker/
High Voltage
Electrical
Drain
Side View
J
K
D
A
C H
2.13
I
Cond.
Air
Outlet
Mounting
(Built In)
Side Wall
Location
Brackets
Shipping
Entrances
Return Air Opening
Electrical
Supply Air Opening
Optional
Top Rain
Flashing
Bottom Installation
Bracket
Back View
S2
T
.44
N
Q
P
M
L
O
E
R
S1
S1
S1
S2
B
FIGURE 2
Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal)