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175245-YIM-C-1008
18
Johnson Controls Unitary Products
NOTE:
Units and ductwork are approved for zero clearance to
combustible materials when equipped with electric heat-
ers.
NOTE:
All entry holes should be field sealed to prevent rain
water entry into building.
FIGURE 10 - UNIT DIMENSIONS - 20 TON
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 and Power
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 KIT
52
-
5
/
8
" (20 TON)
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
ELECTRIC HEAT
ACCESS
CONTROL BOX
ACCESS
136-1/4" (20 TON)
21"
5"
9-3/4"
11-1/2"
2-3/4"
21-1/2"
33"
35"
5-7/8"
35-1/4" (20 TON)
RETURN AIR
SUPPLY AIR
OUTDOOR AIR
OUTDOOR AIR
(Economizer)
TABLE 11: MINIMUM CLEARANCES
LOCATION
CLEARANCE
Front
36”
Back
24” (Less Economizer)
49” (With Economizer
Left Side (Filter Access)
24” (Less Economizer)
36” (With Economizer)
1
1.
If economizer is factory installed, the unassembled
rainhood must be removed from its ride along position
in front of evaporator coil, or in the outdoor air compart-
ment, prior to final installation.
Right Side (Cond. Coil)
36”
Below Unit
2
2.
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.
0”
Above Unit
3
3.
Units must be installed outdoors. Overhanging struc-
tures or shrubs should not obstruct outdoor air dis-
charge outlet.
72” With 36” Maximum
Horizontal Overhang (For
Condenser Air Discharge)
TABLE 12: UTILITIES ENTRY DATA
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