25
2
JOHNSON CONTROLS
5276178-JIM-C-0118
LOCATIONS AND CLEARANCES
The following guidelines should be used to select a
suitable location for unit installation.
1. Unit is designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of
air. Where a choice of location is possible, position
the unit on either north or east side of building.
3. Suitable for roof mount on curb.
4. Roof structures must be able to support the weight
of the unit and its accessories. Unit must be in-
stalled on a solid level roof curb or appropriate
angle iron frame.
5. Maintain level tolerance to 3/4 inch across width
and 2 inches along the length.
Unit clearances are shown in Figure 3.
The clearances shown are to provide
adequate condenser airflow and ser
-
vice access to inside the unit. Addi
-
tional clearance should be considered
for component replacement such as
compressors, evaporator coils, and
supply or exhaust fans.
While it is a common practice to
operate the fan as soon as possible (e.g.,
air movement during construction)
on the job site, the incomplete duct
-
work and missing diffuser grilles
will greatly reduce air resistance and
will allow the fan to operate beyond
design parameters. This practice
may result in water carryover and
flooding of the unit. Also, the supply
fan motor may overamp and become
damaged.
All units require certain clearances for proper operation
and service. The installer must make provisions for
adequate combustion and ventilation air in accordance
with section 5.3,
Air for Combustion and Ventilation of
the National Fuel Gas Code ANSI Z223.1
or Sections
7.2, 7.3 or 7.4 of CAN/CGA B149 installation code-
latest edition and/or applicable provisions of the
local building codes.
Refer to Figure 3 for clearances
required for combustible construction, servicing, and
proper unit operation.
FIGURE 3 - UNIT CLEARANCES
RIGHT
END
LEFT
END
LD14191A
DO NOT use the unit roof to support any
type of structure or bracing.
Summary of Contents for 40 25 TON
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