18-GE10D1-5
13
Installer’s Guide
p.
Openings where field wiring enters the
cabinet must be completely sealed.
Location
of power entry is shown on the outline drawing.
Use 2.5" clear stickers provided to seal all unused
electrical knockouts. See Figure 16.
q. After ductwork connections are made, seal air-
tight and per Local codes.
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 20 for sizes of
the duct connections. After the duct is secured, seal
around the supply duct to prevent air leakage.
NOTE: No sheetmetal screws may be used to attach re-
turn ductwork on the side.
NOTE: On units with sheetmetal returns: Return plenum
must be flanged. Sheetmetal screws must be 1/2" in
length or shorter to ensure no contact with air cleaner
or components. Self-tapping screws are supplied with
the unit in the accessory pack. See Figure 17.
NOTE: If the convertible duct flanges are not used, they
must be removed and discarded for proper airflow.
NOTE: Any duct board return connection can be made
to the sides of the unit using tape or mastic.
E. REFRIGERANT PIPING
IMPORTANT:
Refrigerant piping must be routed to maintain service
access to blower compartment and provide easy re-
moval of filter access panel and COLLECTION CELL.
1.
Refrigerant connections are made outside the
cabinet.
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.
BRAZE SHIELD
Figure 20
NOTE: Penetration around the Refrigerant lines must
be sealed and Electrical inlets must be sealed at both
the low and the high voltage.
2.
Installation of refrigerant lines is covered in the
installation 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.
F. BRAZING TO EVAPORATOR SECTION
NOTE: A brazing shield is provided in the information
pack accompanying this unit. This shield fits over the
refrigerant fittings while brazing. Wet the shield before
brazing. See Figure 20.
IMPORTANT:
Do NOT unseal refrigerant tubing until ready to cut and
fit refrigerant lines.
1.
Remove both sealing caps from indoor coil.
2.
Field supplied tubing should be cut squared-off, en-
suring the tube is still round and free of burrs at
the connecting end. Clean the tubing to prevent
contaminants from entering the system.
3.
Run refrigerant tubing into the stub sockets of in-
door unit coil.
Refrigerant line openings must be
completely sealed.
4.
Braze and evacuate according to indoor and outdoor
installation instructions.
5.
Seal around refrigerant lines.
PAINTED AREAS OF UNIT MUST BE SHIELDED
DURING BRAZING
G. CONDENSATE DRAIN PIPING
NOTE: Make certain that the unit has been installed in a
level position to ensure proper draining.
