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Fig. 24 - - 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. 25. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal
applications.
CONDENSATE PAN (SIDE VIEW)
STANDARD
DRAIN
SIDE DRAIN
(FACTORY-INSTALLED)
Fig. 25 - - Condensate Drain Pan (Side View)
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do
this before setting the unit in place. The red drain pan can
1
be tightened with a
/
- - in. square socket drive extension.
2
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.
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 26.
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
3
(
/
-in.).
4
BURNER
ORIFICE
A93059
ALTERNATE
PLUG
BOTTOM DRAIN
C08021
1
/
- - in.
2
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" (102) trap is recommended
Fig. 26 - - Condensate Drain Piping Details
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
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 —
For those units without through- - the- - curb power, conduit
must be used to route the main power from the condenser
end, via the power entry in the corner post of the unit (see
Figs. 27 and 28) to either the factory option disconnect or
the bottom of the control box. 1" conduit is provided
wrapped around compressor. A second conduit is provided
with factory installed powered convenience outlet. For those
units that require conduit larger than 1", it must be field
supplied. Figs. 27 and 28 show the wire routings.
If the field disconnect is larger than 100A, it must be
attached to the unit using accessory CRDISBKT001A00
— disconnect switch bracket — (see Fig. 29). Follow the
instructions provided with this accessory. For smaller field
disconnects, be sure to use
disconnect directly to the end panel (see Fig. 30). In either
case, set the disconnect vertical location on the unit so
that a 90_ fitting can be used to connect the conduit to the
disconnect.
16
2˝ (51) MIN
SEE NOTE
ROOF
CURB
DRAIN PLUG
.
C08022
[Canadian
Standards
1
/
" screws to mount the
2
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