166349-BIM-E-1008
Johnson Controls Unitary Products
9
If using the duct connector with damper, cut a 9-1/8”x 16-1/8”
hole in the center of the duct bottom. If using the 12” diameter
duct connector without damper cut a 12-1/8” diameter hole in
the center of the duct bottom. Place the duct connector in the
hole and secure tightly with the tabs. If necessary, sup-port duct
connector with support braces. See Figures 6 & 7.
NOTE:
It is advisable to tape joints at the duct connector
airtight. There is extreme pressure exerted by the
blower at this point.
Installing Of Duct To Unit (Residential)
Flanges are provided to help install the ducts to the air
conditioner. The duct flanges must be field in-stalled on the
unit’s side.
The unit’s supply and return air connections are sized for
optimum performance. Should the duct work connecting to the
air conditioner be of smaller dimensions, it is recommended that
transitions connecting the ducts to the unit be constructed to
allow a smooth airflow to the heat unit’s return air opening and
from the supply air opening. Abrupt duct size changes increase
the system static pressure and reduces air volume which may
cause unsatisfactory performance.
Ductwork should be in accordance with local and national
codes.
Ductwork exposed to outside environmental conditions must be
insulated and weather proofed. Out-side wall openings through
which the ducts pass must be weather proofed in accordance
with good construction practices.
Supply and return air ducts passing through unconditioned
spaces of the building must be insulated and covered with a
vapor barrier. Following this practice will prevent thermal losses
and condensate formation on the ducts.
Installing Drain Tube And Connection
A drain tube, a barbed elbow plastic fitting, and a plastic hose
clamp are provided in the small parts package packed in the
blower chute.
1.
To insure proper condensate drainage, the barbed plastic
elbow fitting should be screwed into the unit drain fitting
(located in the front corner of the unit), and the drain tube
installed on the barbed end of the plastic fitting secured in
plastic fitting with the plastic hose clamp.
2.
If it is necessary to drain water away from unit, attach a
drain hose to the drain tube.
Service Access
Access to all serviceable components is provided at the
following locations:
• Blower compartment access panel
• Control box access panel
Refer to Figure 1 for location of these access locations and
minimum clearances in Table 3.
Power And Control Wiring
Field wiring to the unit must conform to provisions of the current
N.E.C. ANSI/NFPA No. 70 or C.E.C. and/or local ordinances.
The unit must be electrically grounded in accordance with local
codes or, in their absence, with the N.E.C./C.E.C. Voltage
tolerances which must be maintained at the compressor
terminals during starting and running conditions are indicated
on the unit Rating Plate and Table 5.
The wiring entering the cabinet must be provided with
mechanical strain relief.
A fused disconnect switch should be field provided for the unit.
If any of the wire supplied with the unit must be replaced,
replacement wire must be of the type shown on the wiring
diagram.
Electrical line must be sized properly to carry the load. Each
unit must be wired with a separate branch circuit fed directly
from the meter panel and properly fused.
Power Wiring
This heat pump is equipped to accept a single circuit of supply
power. If an auxiliary heater is installed, dual circuiting to the
unit can be used. When installing a 14.3 KW heater, this
method will avoid the use of large wiring. To provide single
circuiting, an optional jumper bar can be used to electrically
connect the circuit breakers provided with the heater kit.
If auxiliary electric heaters are not installed, refer to data sheet
for minimum circuit ampacity and maximum overcurrent protec-
tive device size. If auxiliary electric heaters are being installed,
refer to the installation instructions (included with heater pack-
ages) for electrical requirements and wiring information.
To wire this system without the use of auxiliary electric heat,
remove the control box access door.
1.
Remove side panel. Run power line service wiring into
control box through the bottom knockout opening in the
casing. (The two top knockouts are used when installing an
auxiliary heater.)
The drain hose must not rise above the level of the drain
fitting at any point in its routing. Failure to do so will
result in condensate water overflowing into the unit’s
interior.
Wear safety glasses and gloves when handling
refrigerants. Failure to follow this warning can cause
serious personal injury.
