ECR Dunkirk PVWB Series, Manual

12

ELECTRICAL WIRING

Electrical work must be in accordance with require-

ments of authority having jurisdiction or, in absence 

of such requirements, with National Electrical Code, 

ANSI/NFPA 70.

ELECTRIC POWER SUPPLY
Run a separate 120 volt circuit from a separate over 

current protective device in the electrical service en-

trance panel. This should be a 15 ampere circuit. Lo-

cate a shut-off switch at the boiler. It must be turned 

off during any maintenance. Connect 120 volt power 

supply to aquastat terminals L1 (HOT) and L2.

The boiler, when installed, must be electrically 

grounded in accordance with the requirements of 

the authority having jurisdiction or, in the absence of 

such requirements, with the National Electrical Code, 

ANSI/NFPA No. 70. Run a 14 gauge or heavier cop-

per wire from the boiler to a grounded connection in 

the service panel or a properly driven and electrically 

grounded ground rod.

!

WARNING

Turn off electric power at fuse box before 

making any line voltage connections. Fol-

low local electrical codes.

INSTALL YOUR THERMOSTAT

The thermostat location has an important effect on the 
operation of your boiler system. BE SURE TO FOLLOW THE 
INSTRUCTIONS INCLUDED WITH YOUR THERMOSTAT. 

Locate the thermostat about fi ve feet above the fl oor 

on an inside wall. It may be mounted directly on the 

wall or on a vertically mounted outlet box. It should 

be sensing average room temperature, so avoid the 

following:

DEAD SPOTS: 

 Behind doors 

  Corners and alcoves

HOT SPOTS: 

 Concealed pipes 

 Fireplace

 TV sets 

 Radios 

 Lamps

 Direct sunlight

 Kitchens 

COLD SPOTS: 

  Concealed pipes or ducts 

  Stairwells - drafts

  Doors – drafts

  Unheated rooms on other side of wall

Set heat anticipator at .2 amps. 24 volt thermostat 

connects to aquastat terminals T and TV.

VENT DAMPER WIRING
Boiler 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.

Wiring diagrams follow for various different models.

CIRCULATOR WIRING

Pump is not pre-installed on boiler.  Connect 

circulator harness per pump manufacturer’s 

instructions and wiring diagrams in this manual.

!

CAUTION

Label all wires prior to disconnection 

when servicing controls. Wiring errors can 

cause improper and dangerous operation. 

Verify proper operation after servicing.