Carrier 916SA Installation, Start-Up, Operating And Service And Maintenance Instructions page 26

916SA: Installation, Start-up, Operating and Service and Maintenance Instructions
CAUTION
!
FURNACE MAY NOT OPERATE HAZARD
Failure to follow this caution may result in intermittent furnace
operation.
Furnace control must be grounded for proper operation or else control
will lock out. Control must remain grounded through green/yellow wire
routed to gas valve and manifold bracket screw.
115-V Wiring
Furnace must have a 115-V power supply properly connected and
grounded.
NOTE: Proper polarity must be maintained for 115-V wiring. If polarity
is incorrect, control LED status indicator light will flash rapidly and
Status code (10.1) is displayed. The furnace will NOT operate.
Verify that the voltage, frequency, and phase correspond to that specified
on unit rating plate. Also, check to be sure that service provided by
utility is sufficient to handle load imposed by this equipment. Refer to
rating plate or Table 11 for equipment electrical specifications.
U.S.A. Installations: Make all electrical connections in accordance with
the current edition of the National Electrical Code (NEC) NFPA 70 and
any local codes or ordinances that might apply.
Canada Installations: Make all electrical connections in accordance
with the current edition of the Canadian Electrical Code CSA C22.1 and
any local codes or ordinances that might apply.
Use a separate, fused branch electrical circuit with a properly sized fuse
or circuit breaker for this furnace. See
specifications. A readily accessible means of electrical disconnect must
be located within sight of the furnace0
J-Box Installation
WARNING
!
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
High voltage field connections must be located in J-Box with furnace,
or in field supplied external disconnect mounted to furnace.
If field-supplied manual disconnect switch is to be mounted on furnace
casing side, select a location where a drill or fastener cannot damage
electrical or gas components.
The J-Box must be used when field line voltage electrical connections
are made to the furnace wiring harness inside the furnace casing. The
J-Box cover is not required if a field-supplied external electrical box is
attached to the outside of the furnace casing. The field ground wire and
furnace main ground wire are grounded when the J-Box bracket is
attached to the furnace and the field ground wire and factory ground wire
are secured to the bracket grounding screw. If the J-Box cover is not
used, the field and factory spliced connections must be located inside the
external electrical box. Do not leave splice connections unprotected
inside the furnace.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 11 for wire size and fuse
Fig. 35 – Installing J-Box (When Used)
The J-Box cover, mounting bracket and screws are shipped in the loose
parts bag included with the furnace. See
locations.
The J-Box mounting bracket and green ground screw is used as a
grounding point for all line voltage wiring options. The J-Box cover may
be omitted when electrical connections are made inside an external
electrical box mounted external to the casing.
External Electrical Box on Furnace Casing
NOTE: Check to ensure that external electrical box does not interfere
with duct work, gas piping or the indoor coil drain. See
alternate electric entry through top panel.
1. Select and remove 7/8-in. (22 mm) knockout or plug on the desired
side of the casing. Remove the knockout or plug from the casing.
NEUTRAL
LINE VOLTAGE
Fig. 36 – Field-Supplied External Electrical Box on Furnace Casing
NOTE: If electrical entry through the furnace top panel is used, a 7/8-in.
(22 mm) hole must be drilled through the top panel.
26
Fig. 35 for J-Box mounting
GROUND
A12226
Fig. 31 for
A190278