Utica Boilers MGB Series II/MGC Series 安装指导

15

Electrically bond boiler to ground in accordance with       

requirements of authority having jurisdiction.  Refer 

to National Electrical Code, ANSI/NFPA 70.

ELECTRIC POWER SUPPLY
Run separate 120 volt circuit from separate over 

current protective device in electrical service entrance 

panel. This should be a 15 ampere circuit. Locate 

shut-off switch at boiler. It must be turned off during 

any maintenance. Connect 120 volt power supply to 

control leads L1 (HOT) and L2.
LWCO kit 550002998 includes wiring instructions and 

diagrams. If using another LWCO, refer to specific 

manufacturer instructions supplied by appropriate 

manufacturer.
Run a 14 gauge or heavier copper wire from boiler 

to grounded connection in service panel or properly 

driven and electrically grounded ground rod.

Thermostat should be installed on an inside wall 

about four feet above the floor.

NEVER install thermostat on outside wall. 

Do not install a thermostat where it will be 

affected by drafts, hot or cold pipes, sunlight, 

lighting fixtures, televisions, a fireplace, or a 

chimney.

Check thermostat operation by raising and 

lowering thermostat setting as required to start 

and stop the burners.

Instructions for the final adjustment of the 

thermostat are packaged with the thermostat 

(adjusting heating anticipator, calibration, etc.)

Set heat anticipator at .2 amps. 24 volt thermostat 

connects to aquastat terminals T and TV.

Electrical shock hazard.  Turn OFF electrical 

power supply at service panel before making 

electrical  connections.  Failure to do so could 

result in death or serious injury.

  

Label all wires prior to disconnection when 

servicing controls. Wiring errors can cause 

improper and dangerous operation. Verify 

proper operation after servicing.

Boiler is equipped with factory wired harness with 4 

pin molex plug, that plugs into 4 pin molex receptacle 

inside vent damper operator.

Vent damper must be connected for boiler to operate.

If any of the original wire as supplied with this 

appliance must be replaced,

It must be replaced with type 105°C thermoplastic 

wire or its equivalent.