Instructions / Assembly

PART 8 – FIELD WIRING

ELECTRICAL SHOCK HAZARD - 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

C wire or

equivalent. Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70 – Latest Edition.

In order to ease future servicing and maintenance, it is advised to label all wires. Wiring errors can cause improper and dangerous

operation. Failure to follow these instructions could result in property damage or personal injury.

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 boiler. Multiple

knockout locations are available to route field wires into and out of the

electrical junction box. See Figure 30.

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 boiler, each pump can provide a maximum of 4

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.

NOTE: If local electrical codes or conditions require an additional service

switch, the installer must provide and install a fused disconnect or 15 amp

(minimum) service switch.

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 the incoming power wiring to the line voltage terminal strip in the electrical junction box at terminals 120V, Neutral, Ground

(shown in Figure 31).

2. A line voltage fused disconnect 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 boiler 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 30 – Knockout Locations