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Installation and Operation Manual
12.0 FIELD WIRING
All wiring must be in accordance with the Canadian Electrical code CSA C22.1 and/or the National Electrical Code ANSI/NFPA
70, local codes, and this manual. NOTICE: the boiler must be electrically grounded. The electrical rating of the TFTN is 120V
/ 1 Phase / 60 Hz / 12A.
Power Supply – the boiler must be powered using a single phase 120VAC power supply that is
fused (or protected via a circuit breaker) to allow a maximum of 15 Amps. Failure to follow these
instructions may result in component failure, serious injury or death.
Avoid Shocks – To Avoid Electrical Shock, turn off electrical power to the boiler prior to opening
any electrical box within the unit. Ensure the power remains off while any wiring connections are
being made. Failure to follow these instructions may result in component failure, serious injury
or death.
Wiring Connections
All field wiring connections to the boiler are made at barrier strips located on the TFTN control panel. The connections are
accessed by removing the front door of the boiler, followed by the removal of the lower control panel cover; see Figure 12-
1. Field wiring enters the cabinet through holes located on the bottom of the boiler cabinet, then must be routed through
holes in the bottom of the control panel. Field wiring connections are to be installed in accordance with instructions
provided in Tables 12-1 and 12-2, and Figures 12-2 and 12-3.
NOTE: protect the wires from stain and chaffing by using suitable strain-relief grommets when passing the wiring through
the bottom of the boiler.
Line voltage field
connections
Lower control
Panel cover
Wire Protection – When passing wiring through the cabinet of the boiler, the installer must
use wire grommets suitable for securing the wiring and preventing chafing. Failure to follow
instructions may result in component failure, serious injury or death.
62
Figure 12-1 Field Wiring Terminal Access
TFTN 085-199
Low voltage field
connections
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