16
PN 20009722 REV F, [08/01/2020]
ELECTRICAL WIRING
General Electrical Requirements
Electrical wiring must be in accordance with all electrical
codes. In absence of such requirements to the National
Electrical Code (NEC).
Any manufacturer wiring requiring replacement must be
replaced with wiring material having temperature rating of
at least 105°C.
WARNING
Electrical shock hazard. Turn OFF electrical power
supply before making electrical connections. Failure
to do so could result in death or serious injury.
!
1.
Standard unit voltage is 208/230 Vac, 1ph, 60Hz.
Verify model’s electrical requirements from rating plate.
2.
Wires shall be capable of carrying maximum load
current under non-fault conditions at stipulated
voltages.
3.
Avoid large voltage drops on cable runs, particularly in
low-voltage wiring.
4.
Use correct cable size to insure voltage drop of less
than 1 volt in control wiring.
5.
Connect electrical supply after completing water pipe
work.
6.
Low-voltage wiring must be at least 18 AWG.
Connect Wiring
1.
Loosen four screws on front of control box cover. Slide
cover up and off to access high-voltage wiring. See
Figure 23.
2.
Rating plate is located on outside of control box cover.
3.
Protect unit by time delay fuse or breaker. Check rating
plate for circuit ampacity and breaker or fuse size.
Use only HACR type breakers. Select proper wire for
ampacity rating.
4.
Connect local disconnect switch within 3 feet of unit.
High-Voltage Electrical Wiring
1.
Inspect existing wiring for cut or frayed wires. Replace
if found. See Figure 24.
2.
Connect power wire to L1 at power location.
• 115 Vac - Route Cable through 115 Vac Transformer
box for high voltage electrical wiring
• 208/230 Vac – Route cable through hole in control
box for high voltage electrical wiring.
3.
Connect ground wire to ground lug or lead at same
location in control box.
Terminate ALL unused wires with wire nut or crimp
connector.
Figure 23
- Remove Control Box Cover
Figure 24 - Electrical Connections
Low Voltage
