StyleCrest Installation Manual

10
ELECTRICAL WIRING
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical
power to furnace.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
• Electrical connections must be in compliance with all
applicable local codes and the current revision of the
National Electric Code (ANSI/NFPA 70).
• For Canadian installations the electrical connections
and grounding shall comply with the current Canadian
Electrical Code (CSA C22.1 and/or local codes).
Line Voltage Wiring
IMPORTANT NOTES
• Proper line voltage polarity must be maintained for
the control system to operate correctly.
• Circuit breakers installed in this unit provide short-
circuit protection of the internal wiring and serve as
a disconnect. The circuit breakers DO NOT provide
over-current protection of the supply wiring and may
be sized larger than the branch circuit protection.
Overcurrent protection of the supply wiring is
provided by the breaker in the distribution panel
and must be sized as shown in Table 7 (page 17).
It is recommended that the line voltage (240 VAC) to
the furnace be supplied from a dedicated branch circuit
containing the correct fuse or circuit breaker for the furnace.
For minimum circuit ampacity and maximum over-current
protection, see Table 7. See unit wiring diagrams (Figure
22 (page 18)
, Figure 23 (page 19), Figure 24 (page 20),
Figure 25 (page 21), & Figure 26 (page 22)) for wiring
details. Electrical components are shown in Figure 16
(page 12)
. Supply circuit requirements are listed below:
• -010 model is factory-wired for single-branch supply
circuit only.
• -012 models are factory-wired for single-branch supply
circuit (single-circuit kit factory installed). Dual-branch
circuit can be used by removing factory-installed
single-circuit kit. See Figure 14 (page 10).
• -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.
Connecting Supply Service Wires
Power entrance for all models may be through the right
side or through the bottom of the unit.
1. Remove right-hand control panel (when viewing in
downflow position).
2. Locate power supply knockouts in side of unit and in
bottom of unit. Remove appropriate plug(s) or knockout
opening applicable to selected wire size(s).
WARNING:
To avoid personal injury or property damage,
make certain that the motor leads cannot
come into contact with non-insulated metal
components of the unit.
3. Install listed cable connector(s) in opening(s). If metal-
sheathed conduit is used for incoming 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 (Figure 14 & Figure
15
). NOTE: To install single-circuit kit, perform step 5.
If single-circuit kit installation is not needed, go to step
6.
5. To install optional 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 (31 in.-lbs. recommended).
6. Connect service ground wire(s) to grounding lug(s)
provided. See Figure 16 (page 12). One ground is
required for each supply circuit used.
OPTIONAL
SINGLE CIRCUIT
ADAPTOR KIT
CIRCUIT BREAKER
BRACKET
60A
60A
ONON
OFF
OFF
CIRCUIT BREAKER
WIRE ASSEMBLIES
(FACTORY INSTALLED)
SUPPLY SERVICE WIRE
CONNECTION WITH SINGLE
CIRCUIT ADAPTOR KIT
Figure 14. Optional Single Circuit Adaptor Kit
Figure 15. Installation of Supply Service Wires
60A
60A
ON
ON
OFF
OFF
CIRCUIT BREAKER
WIRE ASSEMBLIES
(FACTORY INSTALLED)
CIRCUIT BREAKER
BRACKET
SUPPLY SERVICE WIRE
CONNECTION WITHOUT SINGLE
CIRCUIT ADAPTOR KIT