4
CLEARANCES
CLEARANCES
CLEARANCES
CLEARANCES
CLEARANCES
The air conditioning unit clearances depend on:
1. Inlet air access used;
2. Discharge air duct arrangement;
3. Return air duct;
4. Storage compartment location and design.
A one (1) inch clearance is required on three (3) sides of
the air conditioner if the top return is used. When using the
side access for return, please allow a minimum of eight (8)
inches for the return air duct. Access to the electrical
connections must be provided when making the installation.
5.
5.
5.
5.
5.
EV
EV
EV
EV
EVAPORA
APORA
APORA
APORA
APORATION SECTION
TION SECTION
TION SECTION
TION SECTION
TION SECTION
A.
A.
A.
A.
A. INLET AIR
INLET AIR
INLET AIR
INLET AIR
INLET AIR
The evaporation section must have free access to
room air. A minimum of 128 square inches of FREE
AREA opening is required. Where the return air must
be provided through louvers or mesh screen, the FREE
AREA percentage of the material used shall be taken
into consideration when making this determination. An
example of how to determine FREE AREA is included
under "2. CONDENSER SECTION".
B.
B.
B.
B.
B. GRILLS (See Fig. 3)
GRILLS (See Fig. 3)
GRILLS (See Fig. 3)
GRILLS (See Fig. 3)
GRILLS (See Fig. 3)
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: The return air grill must have the same square
surface as the return air duct.
1) For each air conditioning system, there must be a
return grill to bring cabin air back into the unit. There
must also be at least four discharge grills per unit.
2) Return grills must be mounted in front of the evapo-
rator. If this is not possible, make sure there is nothing
blocking the air flow from the grill to the evaporator.
3) The unit must have a return filter between the grill
and the unit. This filter must be accessible for periodic
cleaning.
C.
C.
C.
C.
C.
OUTLET AIR (See Fig. 3)
OUTLET AIR (See Fig. 3)
OUTLET AIR (See Fig. 3)
OUTLET AIR (See Fig. 3)
OUTLET AIR (See Fig. 3)
The air diffusion system, supplied by the installer, must be
sized to maintain a static pressure at the blower outlet
between .4 and 1.2 inches water column.
All air handling ducts must be properly insulated to prevent
condensation forming on their surface during operation. A
vapor barrier must also be supplied on the outer surface of
the insulation to prevent moisture from traveling through
the insulation and condensing on the cold ductwork.
D.
D.
D.
D.
D.
CONDENSATE DRAIN
CONDENSATE DRAIN
CONDENSATE DRAIN
CONDENSATE DRAIN
CONDENSATE DRAIN
A .50 dia. hole for condensate drainage is located between
the condenser coils. A 1/4" NPT fitting with tubing may be
added to direct condensation.
NOTE
NOTE
NOTE
NOTE
NOTE: Drain fitting and tubing must be used if installed in
a finished compartment.
RETURN SYSTEM
RETURN SYSTEM
RETURN SYSTEM
RETURN SYSTEM
RETURN SYSTEM
Return to be 6 ft. minimum from floor.
Use wall structure for delivery to basement area.
Return grille must be filtered.
Minimum return required per duct sizing for unit to
perform within Engineering specifications. See Chart below:
DUCT SIZE
DUCT SIZE
DUCT SIZE
DUCT SIZE
DUCT SIZE
MINIMUM
MINIMUM
MINIMUM
MINIMUM
MINIMUM
MAX.
MAX.
MAX.
MAX.
MAX.
40 IN.
2
128 IN.
2
189 IN.
2
60 IN.
2
128 IN.
2
189 IN.
2
Electrical box access required.
Each circuit, 15 AMP HACR
breaker
REGISTER REQUIREMENTS
REGISTER REQUIREMENTS
REGISTER REQUIREMENTS
REGISTER REQUIREMENTS
REGISTER REQUIREMENTS
REQ. SIZE
MIN. QTY.
4 X 6
4
4 X 8
4
4 X 10
4
4 X 12
4
ADDITIONAL REQUIREMENTS
ADDITIONAL REQUIREMENTS
ADDITIONAL REQUIREMENTS
ADDITIONAL REQUIREMENTS
ADDITIONAL REQUIREMENTS:
Damper required in furnace.
Vibration isolators should be used
at each mounting point.
12 VDC required for Comfort
Control operation.
INSULATED DUCT
INSULATED DUCT
INSULATED DUCT
INSULATED DUCT
INSULATED DUCT
Minimum
Maximum
40 IN.
2
60 IN.
2
(3 " depth Min.)
Supply Duct must be insulated.
Supply Duct from air conditioner
must be equal to or greater
in IN.
2
as the floor ductwork.
Use 45 degree angle on inlets
& outlets
Optional return area.
May be used in
conjunction with side
return.
FIG. 3
FIG. 3
FIG. 3
FIG. 3
FIG. 3
Condenser air outlet ( X2 in bottom)
Must be isolated from condenser inlet air.
Condenser inlet air 2 places.
