Field Wiring - NTI Trinity Lx150 Installation And Operation Instructions Manual

│Installation and Operation Instructions
Trinity Lx

12.0 FIELD WIRING

All wiring must be in accordance with the Canadian Electrical code, CSA C22.2 and any applicable local codes.
Ensure that the wiring complies with this manual. The boiler must be electrically grounded in accordance with
the National Electrical Code ANSI/NFPA 70, local codes, and/or the Canadian Electrical Code CSA C22.1.
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.
Field Wiring - Wire grommets must be used to secure wiring and prevent chafing when
passing wiring through the cabinet wall. Failure to follow instructions may damage unit.
Line Voltage Connections
Electrical rating for the Trinity Lx is 120V / 1 Phase / 60 Hz / 12A. The Trinity Lx line voltage junction box is
located in the lower right corner of the boiler cabinet on models Lx150-200 and can be accessed by removing the
front door of the boiler, followed by the removal of the line voltage junction box cover. On Lx300-400 models,
the line voltage junction box is located at the top of the boiler cabinet on the right hand side and can be accessed
by removing the top front cover of the boiler. On Lx500-800 models, the line voltage junction box is located at
the back of the boiler cabinet on the power switch side. Remove the top back cover of the boiler to access the
three holes / knockouts needed for routing field wiring into the line voltage junction box. Line voltage field
connections are to be installed in accordance with Figures and Tables 12-1(a) and 12-1(b).
Fuses (120VAC) – The Trinity Lx is equipped with either one or two 7 Amp fuses to protect 120VAC system
components. The fast-acting fuses are located on the front of the control panel box and can be easily
accessed from the outside of the control panel.
Lx150-400 Control Panel:
 Fuse A: Protects the blower, spark generator and PUMP B output circuits.
 Fuse B: Protects PUMP A and PUMP C output circuits.
Lx500-800 Control Panel:
 Fuse A: Protects the 120VAC circuits within the boiler.
Pump Relays (Lx500-800) – In lieu of the 120VAC pump outputs, the Lx500-800 incorporates three non-
powered isolation relay contacts for switching high capacity pumps. Contact Secondary Maximum rating is
1.5HP @ 120V, 3.0HP @ 240V, or 30A. Refer to Figure 12-2(b) for Field Wiring requirements.
Wire Protection - When passing any 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.
Power Supply - The Trinity Lx is 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.
Labeling - Label all wires prior to disconnecting them when servicing controls. Wiring
errors can cause improper and dangerous operation. Failure to follow instructions may
result in property damage or personal injury.
Continuity - Before connecting the line voltage wiring, perform a continuity check
between all wires and ground to make sure that there are no electrical leaks that could
blow a fuse or damage electrical components. Also check the polarity of the line and
neutral wires. Line must measure 120VAC to ground; neutral must measure zero.
Failure to follow instructions may damage the unit.
Max Load – Lx150-400 circulator outputs are each limited to operating a circulator with
a maximum current load of 3 Amps or a maximum 1/6 hp motor. See Table 12-1.
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Lx Series