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The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 25.
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4” (102) trap is recommended.
MINIMUM PITCH
1” (25mm) PER
10’ (3m) OF LINE
BASE RAIL
OPEN
VENT
TO ROOF
DRAIN
DRAIN PLUG
ROOF
CURB
SEE NOTE
2˝ (51) MIN
C08022
Fig. 25 -- 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
(
3
/
4
-in.).
Step 12 — Make Electrical Connections
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.
!
WARNING
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. 26 and 27) 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. 26 and 27 show the wire routings.
C10884
Fig. 26 -- Conduit into Factory Option Disconnect
C10885
Fig. 27 -- Conduit into Control Box
If the field disconnect is larger than 100A, it must be
attached to the unit using accessory CRDISBKT001A00
— disconnect switch bracket — (see Fig. 28). Follow the
instructions provided with this accessory. For smaller field
disconnects, be sure to use
1
/
2
” screws to mount the
disconnect directly to the end panel (see Fig. 29). 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.
C10853
Fig. 28 -- Mounting Position for Field Disconnects
(over 100A)
48TC**16