Make Electrical Connections, Field Power Supply

The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 15.

MINIMUM PITCH

1” (25mm) PER

10’ (3m) OF LINE

TO ROOF

DRAIN

BASE RAIL

2˝ (51) MIN

OPEN

VENT

SEE NOTE

ROOF

CURB

DRAIN PLUG

C10010

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended.

C08022

Fig. 15 - Condensate Drain Piping Details

Fig. 16 - Conduit into Factory Option Disconnect

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 10 — 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: Check all factory and field electrical connections for tightness. Field-supplied wiring shall conform with the limitations of 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 of the unit to either the factory option disconnect, the bottom of the control box or the single point box accessory. 1” conduit is provided behind the access panel located under the control box. For those units that require conduit larger than 1”, it must be field supplied. Figures 16, 17 and 18 show the various wire routings.

C10011

Fig. 17 - Conduit into Control Box

C10012

Fig. 18 - Conduit into Single Point Box

If the field disconnect is larger than 100A, it must be attached to the unit using accessory CRDISBKT001A00 (see Fig. 19). 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. 20). 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.

548J*14D specifications

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