STEP 6: WIRING BOILER

WARNING: Turn off electrical power supply before servicing. Contact with live electric components can cause electric shock or death.

All electrical and control wiring must be installed in accordance with the codes listed in Section 1 of this manual. Follow the wiring diagram for your particular installation as shown in Figures 2.8, 2.9, 2.10, and 2.11.

FIGURE 2.8: Wiring Diagram & Operation Sequence for Boilers Equipped with Intermittent Pilot, Vent Damper and M & M #67 Low Water Cut-Off

For vent damper-equipped models, connect thermostat to blue leads (see Figures 2.4 & 2.4A).

NOTE: If any of original wire supplied with boiler must be replaced, use similar wire of 105° C rating. Other- wise, insulation may melt or degrade, exposing bare wire.

NOTE: Boiler transformer must not be used to power external accessories (i.e., zone valves, relays, etc.) Oth- erwise, transformer will be overloaded and burn out.

FIGURE 2.9: Wiring Diagram & Operation Sequence for Boilers Equipped with Standing Pilot, Vent Damper and M & M #67 Low Water Cut-Off

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