Sealing The Unit; Electrical Connections - Lennox CBX25UH Installation Instructions Manual

Sealing the Unit

Seal the unit so that warm air is not allowed into the
cabinet. Warm air introduces moisture, which results in
water blow-off problems. This is especially important when
the unit is installed in an unconditioned area.
If installed in an unconditioned space, sealant should be
applied around the electrical wires, refrigerant tubing, and
condensate lines where they enter the cabinet.
WARNING
There must be an air-tight seal between the bottom of the
air handler and the return air plenum. Use fiberglass
sealing strips, caulking, or equivalent sealing method
between the plenum and the air handler cabinet to
ensure a tight seal. Return air must not be drawn from a
room where this air handler or any gas-fueled appliance
(i.e., water heater), or carbon monoxide-producing
device (i.e., wood fireplace) is installed.
IMPORTANT
Use duct tape and/ or Permagum to seal closed any
space around the holes where the drain lines exit the
cabinet. Warm air must not be allowed to enter through
any gaps or holes in the cabinet.

Electrical Connections

WARNING
Electric shock hazard! - Disconnect all
power supplies before servicing.
Replace all parts and panels before oper­
ating.
Failure to do so can result in death or elec­
trical shock.
WARNING
Run 24V Class II wiring only through specified low
voltage opening. Run line voltage wiring only
through specified high voltage opening. Do not
combine voltage in one opening.
Electric Shock Hazard.
Can cause injury or death.
Foil‐faced insulation has conductive characteristics sim­
ilar to metal. Be sure there are no electrical connections
within a ½" of the insulation. If the foil‐faced insulation
comes in contact with electrical voltage, the foil could
provide a path for current to pass through to the outer
metal cabinet. While the current produced may not be
enough to trip existing electrical safety devices (e.g.
fuses or circuit breakers), the current can be enough to
cause an electric shock hazard that could cause person­
al injury or death.
Electric Shock Hazard. Can cause
injury
grounded in accordance with national
and local codes.
Line
components when unit is not in
operation on units with single‐pole
contactors. Disconnect all remote
electric
opening access panel. Unit may have
multiple power supplies.
S
Wiring must conform to the current National Electric
Code ANSI/NFPA No. 70, or Canadian Electric Code
Part I, CSA Standard C22.1, and local building codes.
Refer to following wiring diagrams. See unit
nameplate for minimum circuit ampacity and
maximum over-current protection size.
S
Electrical wiring, disconnect means and over-current
protection are to be supplied by the installer. Refer to
the air handler rating plate for maximum over-current
protection, minimum circuit ampacity, as well as
operating voltage.
Select the proper supply circuit conductors in
accordance with tables 310-16 and 310-17 in the
National Electric Code, ANSI/NFPA No. 70 or tables
1 through 4 in the Canadian Electric Code, Part I,
CSA Standard C22.1.
S
The power supply must be sized and protected
according to the specifications supplied on the
product.
Page 12
WARNING
WARNING
or death. Unit
voltage is present
power supplies
must be
at all
before