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Fig. 21 − Orifice Hole
Step 11 — Install External Condensate Trap and
Line
3
The unit has one
/
-in. condensate drain connection on
4
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 22. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal
applications.
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a
square socket drive extension) and install it in the side
drain connection.
CONDENSATE PAN (SIDE VIEW)
STANDARD
DRAIN
SIDE DRAIN
(FACTORY-INSTALLED)
Fig. 22 − Condensate Drain Pan (Side View)
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 23.
BURNER
ORIFICE
A93059
1
/
−in.
2
ALTERNATE
PLUG
BOTTOM DRAIN
C08021
MINIMUM PITCH
1" (25mm) PER
BASE RAIL
10' (3m) OF LINE
OPEN
VENT
TO ROOF
DRAIN
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4" (102mm) trap is recommended.
Fig. 23 − Condensate Drain Piping Details
All units must have an external trap for condensate
drainage. Install a trap at least 4-in. (102 mm) deep and
protect against freeze-up. If drain line is installed
downstream from the external trap, pitch the line away from
the unit at 1-in. per 10 ft (25 mm in 3 m) of run. Do not use
a pipe size smaller than the unit connection (
Step 12 — Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground. Unit
cabinet must have an uninterrupted, unbroken electrical
ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist
of electrical wire connected to unit ground lug in control
compartment, or conduit approved for electrical ground
when installed in accordance with NEC (National
Electrical Code); ANSI/NFPA 70, latest edition (in
Canada, Canadian Electrical Code CSA [Canadian
Standards Association] C22.1), and local electrical codes.
NOTE:
Field−supplied wiring shall conform with the
limitations of minimum 63_F (33_C) rise.
Field Power Supply —
If equipped with optional Powered Convenience Outlet: The
power source leads to the convenience outlet's transformer
primary are not factory connected. Installer must connect
these leads according to required operation of the
convenience outlet. If an always−energized convenience
outlet operation is desired, connect the source leads to the
line side of the unit−mounted disconnect. (Check with local
codes to ensure this method is acceptable in your area.) If a
de−energize via unit disconnect switch operation of the
convenience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a
unit−mounted disconnect, connect the source leads to
compressor contactor C and indoor fan contactor IFC
pressure lugs with unit field power leads (see Fig. 24).
17
3˝ (76mm)
MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
C11291
3
/
-in.).
4
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