Specifications

2-1
JOHNSON CONTROLS
FORM 102.20-N1 (1109)
2
Do not weld or use torches on the ex-
terior or interior of the unit housing.
The housing contains polyurethane
insulation, which under combustion
will produce harmful, toxic gases re-
sulting in personal injury or death.
This instruction is written to provide
general information. The product
line allows many variations and the
installer is fully responsible for ad-
justing his actions as needed. If any
questions regarding the content of
this manual, or if any information is
not covered, contact local Johnson
Controls Service.
Surface must be level on all installa-
tions.
If your unit has HEPA lters the l-
ter frames, lter bulkheads and lter
segment panels are factory sealed
and must remain sealed for NO air
bypass.
Never use silicone caulk/sealant or
caulk/sealant containing silicone in or
on any air handling equipment. [Only
exception is when provided (high tem-
perature) with gas heat venting].
SITE PREPARATION
Outdoor Units (Site Prep)
Location of unit(s) should be away from building
ue stacks or exhaust ventilators to prevent possible
introduction of contaminated air through the outside
air intakes (see Fig. 2-1 for service clearances).
Allow sufcient space around the unit
for removing the access panels and
various parts of the unit. A minimum
clearance equal to the width of the unit
must be provided on one side of the
unit for removing the coil or fan as-
sembly. Add dimension of pipe chase,
air hoods, ducts, control/electrical
panels, etc. to minimum clearances.
Allow additional clearance as required
by local and national codes. Consider
Coil Access Panel for coil removal on
outdoor units.
FIG. 2-1 – MINIMUM SERVICE CLEARANCES
LD6328-4
36"
36"
UNIT WIDTH
36"
A
B C D E F
G
H
C
D
Fan Section
Coil Section
Face and Bypass Damper Section
Filter Section - Door should open 180°
Inlet Section
Rain Hood (add to unit width or length)
Pipe Chase Enclosure (add to unit width)
E
F
A
B
G
Coil Access Panel on Outdoor Unit (allow clearance = to unit width)
H
MIN. CLEARANCE DIMENSIONS
2.0 INSTALLATION