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
unit disconnect. On a unit without a
All units except
NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended.
C08022
Fig. 14 - Condensate Drain Piping Details
All units must have an external trap for condensate drainage. Install a trap at least
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 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
power terminal block or at
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Field power wires are connected to the unit at | 50HCQA | |
pressure lugs on compressor contactor C and indoor fan | ||
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contactor IFC or terminal board (see wiring diagram label |
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for control box component arrangement) or at |
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Max wire size is #2 AWG (copper only). (See Fig. 16) |
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NOTE: TEST LEADS - Unit may be equipped with |
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short leads (pigtails) on the field line connection points on |
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contactor C or optional disconnect switch. These leads are |
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for factory |
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before connecting field power wires to unit connection |
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points. Make field power connections directly to line |
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connection pressure lugs only. |
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!WARNING
FIRE HAZARD
Failure to follow this warning could result in intermittent operation or performance satisfaction.
Do not connect aluminum wire between disconnect switch and furnace. Use only copper wire.
(See Fig. 15.)
ELECTRIC
DISCONNECT
SWITCH
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
Fig. 15 - Disconnect Switch and Unit
Units Without Factory-Installed Disconnect —
When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.
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