035-18940-000-B-1003
Unitary Products Group
25
FIGURE 13 - DIMENSIONS & CLEARANCES 15, 20 & 25 TON
Front
36"
Back
24" (Less Economizer)
49" (With Economizer)
Left Side (Filter Access)
24" (Less Economizer)
36"
3
(With Economizer)
Right Side (Cond. Coil)
36"
Below Unit
1
2
0"
Above Unit
2
72" With 36" Maximum
Horizontal Overhang
(For Condenser Air
Discharge Outlet)
Units (applicable in U.S.A. only) may be installed on combustible floors
made from wood or class A, B or C roof covering material.
2
Units must be installed outdoors. Overhanging structures or shrubs should
not obstruct condenser air discharge outlet.
3
If economizer is factory installed, the assembled hood kit must be removed
prior to final installation. This hood is 54" long.
NOTE:
A 1" clearance must be provided between any combustible material and the
supply air ductwork for a distance of 3 feet from the unit.
The products of combustion must not be allowed to accumulate within a
confined space and recirculate.
Locate unit so that the vent air outlet hoods are at least:
Three (3) feet above any forced air inlet located within 10 horizontal feet (ex-
cluding those integral to the unit).
Four (4) feet below, 4 horizontal feet from, or 1 foot above any door or gravity
air inlet into the building.
CLEARANCES
1
Four (4) feet from electric meters, gas meters, regulators and relief equip-
ment.
RETURN
AIR
SUPPLY
AIR
BOTTOM SUPPLY
AND RETURN
AIR OPENINGS
(See Note)
(B)
POWER WIRING
ENTRY
(A)
CONTROL WIRING
ENTRY
NOTE:
For curb mounted units, refer to the curb hanger
dimensions of the curb for the proper size of the
supply and return air duct connections.
UNIT BASE WITH RAILS
Shown separately to illustrate
Bottom Duct openings, Power
and Gas Piping Connection
locations
12-1/2"
9-1/4"
8-1/8"
9-3/4"
3-3/4"
(B)
POWER WIRING
ENTRY
(A)
CONTROL WIRING
ENTRY
92"
CONDENSER
COILS
OPTIONAL
COIL GUARD
COMPRESSOR
ACCESS
(See detail "X")
ECONOMIZER / MOTORIZED DAMPER,
FIXED OUTDOOR INTAKE AIR AND
POWER EXHAUST RAIN HOODS
(See detail "Y")
FIELD-SUPPLIED
DISCONNECT SWITCH
LOCATION
BLOWER
ACCESS
BLOWER MOTOR
ACCESS
BLOWER
COMPARTMENT
ACCESS
(Auxiliary)
DOT PLUG
(For pressure
Drop Reading)
FRONT
VIEW
CONTROL BOX
ACCESS
21"
5"
9-3/4"
11-1/2"
2-3/4"
21-1/2"
33"
35"
5-7/8"
46-5/8"
7-1/8"
6-3/8"
VENT AIR
OUTLET
HOODS
COMBUSTION
AIR INLET
HOOD
GAS HEAT
ACCESS
(C)
GAS SUPPLY
ENTRY
46-5/8"
11-1/8"
(D)
GAS SUPPLY
ENTRY
48-5/8" (15 TON)
52-5/8" (20, 25 TON)
12
-
1/4
"
(15 T
ON)
35-1/4
" (20,
25 TON)
125-1/4
"
(15 TON)
136-1/4
"
(20, 25
TON)
ELECTRIC
RETURN AIR
OUTDOOR AIR
(Economizer)
SUPPLY AIR
CONDENSER AIR
HOLE
OPENING
SIZE
(DIA.)
USED FOR
A
1-1/8" KO
Control
Wiring
Front
3/4" NPS (Fem.)
Bottom
B
3-5/8" KO
Power
Wiring
Front
3" NPS (Fem.)
Bottom
C
2-3/8" KO
Gas Piping (Front)
D
1-11/16" Hole Gas Piping (Bottom)*
*Opening in the bottom of the unit can be located by the slice
in the insulation.
UTILITIES ENTRY DATA
S U P P L Y
A I R
C O M P A R T M E N T
P O W E R
E X H A U S T
R A I N
H O O D
( o n
R e t u r n
A i r
C o m p a r t m e n t )
E C O N O M I Z E R
M O T O R I Z E D
D A M P E R
R A I N H O O D
( o n O u t d o o r A i r C o m p a r t m e n t )
E C O N O M I Z E R
/
M O T O R I Z E D
D A M P E R
A N D
P O W E R
E X H A U S T
R A I N
H O O D S
F I X E D
O U T D O O R
A I R
I N T A K E
H O O D
( l o c a t e d o n
R e t u r n A i r
C o m p a r t m e n t )
1 " C O N D E N S T A T E
D R A I N
( M u s t b e t r a p p e d )
R E A R V I E W
L H V I E W
D E T A I L " Y "
U N I T W I T H R A I N H O O D S
3 6 "
6 6 - 1 / 2 "
9 2 "
3 6 - 1 / 4 "
5 "
3 4 - 1 / 4 "
1 6 - 1 / 8 "
2 "
RETURN
AIR
OUTDOOR
AIR
SUPPLY
AIR
GAUGE LINE
ACCESS
COMPRESSOR
ACCESS
SUPPLY AIR
ACCESS
CONDENSER SECTION
RETURN AIR
ACCESS
OUTDOOR AIR
COMPARTMENT
ACCESS
1" NPT FEMALE
COND. DRAIN
CONNECTION
FILTER
ACCESS
DOT PLUG
(For pressure
drop reading)
EVAPORATOR
SECTION
40-1/2"
27-3/4"
5
-
1/8"
18-5/8"
5-1/2"
40-3/8"
REAR
VIEW
28-5/8" (15 Tons)
39-5/8" (20, 25 Tons)
DUCT COVERS - Units are shipped with the bottom duct
openings covered. An accessory flange kit is available for
connecting side ducts.
For bottom duct applications:
1. Remove the side panels from the supply and return air
compartments to gain access to the bottom supply and
return air duct covers.
2. Remove and discard the bottom duct covers. (Duct open-
ings are closed with sheet metal covers except when the
unit includes a power exhaust option. The covering con-
sists of a heavy black paper composition.)
3. Replace the side supply and return air compartment pan-
els.
For side duct applications:
1. Replace the side panels on the supply and return air
compartments with the accessory flange kit panels.
2. Connect duct work to the duct flanges on the rear of the
unit.
DETAIL “X”
(ACCESSORY SIDE SUPPLY AND RETURN AIR OPENINGS)
All dimensions are in inches. They are
subject to change without notice. Certified
dimensions will be provided upon request.
