Field Wiring - NTI Trinity TX Series Installation And Operation Manual

Tx I&O 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 Tx is 120V / 1 Phase / 60 Hz / 12A.
Power Supply - Tx units are designed to 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 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 wiring connections to the Trinity Tx are made at the junction box, located behind the control panel at the
bottom of the boiler cabinet, see Figure 12-1.
bottom (underside) of the boiler cabinet; use suitable strain-relief grommets to protect the wires. Field wiring
connections are to be installed in accordance with instructions provided in Figure 12-2 and Table 12-1.
Controller Fuse (120VAC) – the Tx controller is equipped with a 3.15 Amp fuse that protects most 120VAC
circuits within the boiler, as well as any circulators connected to it. A spare fuse is located to the left of the
operating fuse in an open holder; see Figure 12-1.
Blower Fuse (120VAC) – an inline 7 Amp fuse, located in a fuse holder below the combustion blower, protects
the 120VAC circuit of the blower; see Figure 12-1.
Reverse View
Spare Fuse
Controller Fuse – 3.15A
®
5x20mm Slo-Blo
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.
Field wiring enters the cabinet through holes located on the
Figure 12-1 Wiring Terminal Access
Control Panel
(Swings Out)
Field Wiring
Terminals
│Cascade Instructions
Inline Blower Fuse
(3AG 7A 250 Fast-acting)
– breaks blower power wire
49