6
18-GE14D1-5
Installer’s Guide
Figure 11. Control Box Screw Locations
Control Box Screws
Figure 10. Flange Attachment
D. DUCT CONNECTIONS
The supply and return air ducts should be connected to
the unit with flame retardant duct connectors. Convert-
ible duct flanges are provided on the discharge opening
to provide a “flush fit” for 3/4" or 1-1/2" duct board appli-
cations, see the Outline drawing on page 17 for sizes of
the duct connections. After the duct is secured, seal
around the supply duct to prevent air leakage.
NOTE: If the convertible duct flanges are not used, they
must be removed and discarded for proper airflow.
COMM Control box must be removed to install or ser-
vice heater accessory or communicating controls. See
Figure 11.
IMPORTANT: Do NOT cover up control box screws with
duct work. See Figure 11.
NOTE: If needed, a duct board return connection can be
made to the sides of the unit using tape and/or mastic.
E. REFRIGERANT PIPING
IMPORTANT: Refrigerant piping must be routed to
maintain service access to blower compartment and
provide easy removal of filter access panel and filter.
1. Refrigerant connections are made outside the cabi-
net.
NOTE: TXV bulb MUST be protected (wrap a wet rag
around the suction line between the TXV bulb and the
braze joint) or removed, while brazing the tubing. Over-
heating of the sensing bulb will affect the functional
characteristics and performance of the air handler.
NOTE: Penetration around the Refrigerant lines must
be sealed and Electrical inlets should be sealed at
both the low and the high voltage.
2. Installation of refrigerant lines is covered in the in-
stallation instructions packaged with the outdoor
unit. Evacuation, leak testing and brazing proce-
dures are included in those instructions. Read those
instructions before starting installation of refriger-
ant lines.
