Utica Gas-fired Boiler Installation Manual download pdf (Page 14)

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HOT WATER CONTROL AND INTERMITTENT IGNITION WIRING WITH LIMIT CONTROL

24 VOLT GAS CONTROL WIRING WITH LIMIT CONTROL

TH-1 THERMOSTAT (MILLIVOLT) 1K RELAY COIL NOT ALL COMPONENTS LISTED ARE USED IN ALL CONTROLS SYSTEMS.

TH-2 THERMOSTAT (24V) 1K1 RELAY CONTACTS

TH-3 THERMOSTAT (LINE VOLTAGE) 1K2 RELAY CONTACTS LINE VOLTAGE BY FACTORY

TR-1 TRANSFORMER (120V/24V 40VA LS LIMIT SWITCH LOW VOLTAGE BY FACTORY

TR-2 TRANSFORMER (120V/24V 50VA) MS MANUAL SWITCH LINE VOLTAGE BY INSTALLER

MGV MILLIVOLT GAS VALVE CIR CIRCULATOR LOW VOLTAGE BY FACTORY

LGV 24V GAS VALVE ECO ENERGY CUT OFF

LGV-1 24V GAS VALVE LWCO LOW WATER CUT OFF

NOTES:

PS PRESSURE SWITCH ESF ELECTRIC WATER FEEDER 1. SWITCHES ARE SHOWN IN POSITION TAKEN DURING THE HEATING CYCLE.

MR-PS MANUAL RESET PRESSURE SWITCH PG POWER GENERATOR 2. IF ANY OF THE ORIGINAL WIRING SUPPLIED WITH THE BOILER IS REPLACED,

SD STACK DAMPER PSC PILOT SAFETY COIL IT MUST BE REPLACED WITH LIKE WIRE SIZE AND TYPE OF INSULATION OR EQUIVALENT.

CONTROL TERMINAL WIRE CONNECTION

CAUTION

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify

proper operation aer service.

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Utica Gas-fired Boiler Installation Manual Page 14