Electrical Connections - Rinnai E75CN Installation & Servicing Instructions Manual

7

Electrical connections

CAUTION
CAUTION
CAUTION
!
CAUTION
46
The electrical connections to the boiler must be electrically grounded in accordance
with all applicable local codes and the latest revision of the National Electrical Code,
ANSI/NFPA-70. Installations should also conform with CSA C22.1 Canadian Electrical
Code Part 1 if installed in Canada.
Devices such as, outdoor sensor, room thermostat or temperature control, and
temperature sensor or thermostat are all connected to the internal connection terminal.
The connection terminal is situated behind the Control Tower.
Connecting incoming power
Install a 120V main switch next to the boiler as service main switch of the boiler.
Lead the cable through the back part of the boiler using a strain relief and lead the
cable through the cable supports to the Control Tower. Use a step drill bit to create a
knockout in the grey plastic cover of the boiler for a strain relief.
Connect a power supply cable to the cable harness terminal strip that connects to
both the power switch on the front of the Control Tower and the terminal strip with
positions 1, 2, and 3 on the inside of the Control Tower.
The boiler must be electrically grounded in accordance with local codes, or
in absence of local codes, with the National Electrical Code, ANSI/INFPA 70
and/or the CSA C22.1, Electrical Code.
RISK OF ELECTRIC SHOCK.
Once the main power supply is on then there is 120V on terminals 1 to 12 when the
main switch next to the boiler is switched on.
- No changes may be made to the wiring of the boiler;
- All connections should be designed in accordance with the applicable
regulations;
- Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation.
- Verify proper operation after operation servicing.