46
LP- 293 REV. 9.2.14
PART 7 – FIELD WIRING
ELECTRICAL SHOCK HAZARD -
For your safety, turn off electrical power supply at service entrance panel before making any
electrical connections. Failure to do so can result in severe personal injury or death.
Wiring must be N.E.C. Class 1. If original wiring supplied with the boiler must be replaced, use only UL Listed TEW 105
o
C wire or
equivalent. Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70
– Latest Edition.
To ease future service and maintenance, label all wires. Wiring errors can cause improper and dangerous operation, and result in
substantial property damage, severe personal injury, or death.
A. INSTALLATION MUST COMPLY WITH:
1. National Electrical Code and any other national, state, provincial or local
codes or regulations.
2. In Canada, CSA C22.1 Canadian Electrical Code Part 1, and any local
codes.
B. FIELD WIRING TERMINATIONS
All connections made to the boiler in the field are done inside the electrical
junction box located on the left side of the unit. Multiple knockout locations are
available to route field wires into and out of the electrical junction box.
C. FIELD WIRING
The control used in the boiler is capable of directly controlling 1 pump in
standard mode and 2 pumps when configured as a cascade master boiler. As a
standard unit, each pump can provide a maximum of 3 amps at 120 volts. If a
pump requires more than this amount of power, an external contactor or motor
starter is needed. If the boiler is configured as a cascade master, the system
pump output is a dry contact output capable of switching 5 amps at 120 volts, in
addition to the boiler pump output sourcing 4 amps each.
The electrical junction box has separate, clearly marked terminal strips for line voltage and low voltage wiring. Special jacks are
provided for trouble-free cascade system wiring using standard CAT3 or CAT5 patch cables.
D. LINE VOLTAGE WIRING FOR STANDARD BOILER
NOTE:
A termination plug is included in the CAT 3 / CAT 5 Bus Connection Point, labeled J3 in Figure 23. DO NOT REMOVE THIS
PLUG! Doing so will affect boiler operation and void warranty.
1. Connect 120V / 60Hz / 15 AMP incoming power wiring to the line voltage terminal strip in the electrical junction box at terminals
120V, Neutral, Ground (shown in Figure 26).
2. A line voltage fused disconnect or service switch may be required, externally mounted and connected according to local codes that
may apply.
To avoid electrical shock, turn off all power to the appliance prior to opening an electrical box within the unit. Ensure the power remains
off while any wiring connections are being made. Failure to follow these instructions could result in component or product failure,
serious injury, or death. Such product failure IS NOT covered by warranty.
Figure 25
– Knockout Locations
Содержание EL-110
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