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• -010 model is factory-wired for single-branch
supply circuit only.
• -012 models are factory-wired for single-
branch supply circuit (single-circuit kit in-
stalled). Dual-branch circuit can be used by
removing factory-installed single-circuit kit
(see Figures 20 and 21).
• -015, -017, -020 and -023 models are
factory-wired for dual-branch supply circuit.
Single-branch circuit can be used by
installing optional single-circuit kit .
IMPORTANT:
Note: Circuit breakers installed within
this unit are for short-circuit
protection of the internal wiring
and to serve as a disconnect. Circuit
breakers installed within this unit DO
NOT provide over-current protection
of the supply wiring and therefore may
be sized larger than the branch circuit
protection.
1 3/4" MIN
(45 mm)
23 3/4"
(604 mm)
3/4"
(20 mm)
20"
(508 mm)
17 1/2"
(445 mm)
14"
(356 mm)
5 3/4"
(147 mm)
3 1/8"
(80 mm)
3"
(73 mm)
Furnace
Outer Door
For Optional
A/C Or H/P
REAR WALL OF ENCLOSURE
CENTER LINE
Furnace
Outline
18 5/8"
(474 mm)
Figure 19. Upfl ow Floor Cutout Locations (nominal dimensions)
Connecting Supply Service Wires
1. Remove right-hand control panel (when
viewing in downfl ow position).
2. Locate power supply hole plugs in side
of unit and in bottom of unit. Remove
appropriate plug(s) or knockout opening
applicable to recommended wire size(s).
3. Install listed cable connector(s) in opening(s).
If metal-sheathed conduit is used for incom-
ing power line(s), provide an approved metal
clamp on conduit and secure it in entrance
knockout.
4. Insert supply service wire(s) through cable
connector(s) and connect wires to circuit
breakers (Figures 20 and 21).
NOTE: To install single-circuit kit, perform
step 5. If single-circuit kit installation is not
necessary, go to step 6.
5. To install single-circuit kit:
a. Loosen lugs at supply side of circuit
breakers.
b. Remove cover from single-circuit kit (if
supplied).
c. Insert metal buss bars of kit into lugs of
circuit breaker.
d. Tighten lugs securely (45 in.-lbs. recom-
mended).