Weil-McLain GOLD DV WATER BOILER manual VI Field wiring, Electrical installation must comply with

GOLD GV Water boiler series 3 — manual

VI Field wiring

Electrical installation must comply with:

National Electrical Code and any other national, state, provincial or local codes or regulations.

In Canada, C.S.A. C22.1 Canadian Electrical Code Part 1, and any local codes.

Wiring must be N.E.C. Class 1.

If original wiring as supplied with boiler must be replaced, use only type 90 °C wire or equivalent.

Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70-latest edition.

Wiring connections

Thermostat(s)

Install on inside wall away from influences of drafts, hot or cold water pipes, lighting fixtures, television, sunrays, or fireplaces.

Follow instructions with thermostat. If it has a heat anticipator, set heat anticipator in thermostat to match power requirements of equipment connected to it (ignition control and gas valve, zone valve contacts, etc.). Wiring diagram on boiler gives setting for standard equipment (ignition control and gas valve).

Thermostat wires are labeled "T-T" on boiler. Remove label before connecting as shown in Figure 18. Route this wiring through the hole in the upper left side jacket.

For zoned systems, substitute the zone valve end switches or circulator relay contacts for the thermostat contact shown in Figure 18.

When using three-wire zone valves, take care to avoid miswiring. This can impose an additional 24 volts across the boiler control circuitry. The boiler control module will sense this problem and lockout. It will flash the POWER and TSTAT CIRC lights to indicate the problem. See label on control module for explanation of lockout conditions. To verify before connecting to boiler, disconnect field thermostat wires at boiler. Place a voltmeter across the leads. Then watch the voltmeter as each zone is activated (by activating zone thermostat). There should never be a voltage reading across the two leads coming to the boiler. If you see a voltage reading, one or more zone valves is miswired.

Junction Box (furnished)

Mount the 2 x 4 junction box on the left side of the boiler as shown on page 3 of this manual and in other illustrations.

Fused disconnect or service switch (15 amp. recommended) may be mounted on this box. For those installations with local codes which prohibit installation of fused disconnect or service switch on boiler, install a 2 x 4 cover plate on the boiler junction box and mount the service switch remotely as required by the code.

Connect 120 VAC power wiring as shown in Figure 18.

40 Part number 550-141-850/0699