Carrier 58DP - Manual (Page 3)

Fig. 5—Combustible Floor Base
Fig. 6—Furnace, Plenum, and
Base Installed on a Combustible Floor
VI. ELECTRICAL CONNECTIONS
A. Line-Voltage Wiring
NOTE:
Refer to “Procedures for Natural-Draft Gas Fur­
naces” (packaged with the equipment) for additional
information.
A WARNING
The cabinet must have an uninterrupted or unbroken
ground according to National Electrical Code, ANSI/
NFPA 70-1987, or local codes to minimize personal
injury if an electrical fault should occur. This may con­
sist of electrical wire or conduit approved for electrical
ground when installed in accordance with existing elec­
trical codes. Do not use gas piping as an electrical
ground. A failure to adhere to this warning can result in
an electrical shock, fire, or death.
If line-voltage wiring to the unit is encased in a nonmetallic
sheath, connect the incoming ground wire to the grounding
wire inside the furnace J-box. If metallic conduit is used, it
will serve as the ground.
B. Low-Voltage Wiring
Make field low-voltage connections at the low-voltage termi­
nal strip. See Fig. 9.
NOTE:
Use AWG No. 18 “color-coded” copper thermostat
wire for lengths up to 100 ft. Above 100 ft, use AWG No. 16
wire.
Fig. 7—Amp Draw Check With Ammeter
A CAUTION
Do not connect aluminum wire between disconnect
switch and furnace.
See Fig. 9 for wiring diagram showing the proper field high-
and low-voltage wiring.
Use a separate fused branch electrical circuit containing a
properly sized fuse or HACR-type circuit breaker for this
furnace. A disconnecting means must be located within
sight from, and readily accessible to, the furnace. In some
areas, the unit door switch may qualify as the disconnecting
means.
mSm
A79077
Fig, 8—Printed-Circuit Control Center
A78461.
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