Electrical Wiring - Dunkirk 90-50 Installation, Operation & Maintenance Manual

Turn off electrical power at fuse box before
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making any line voltage connections. Follow
local electrical codes.
All electrical work must conform to local codes as well as the
National Electrical Code, ANSI/NFPA70, and/or the Canadian
Electrical Code, Part 1, CSA C22.1, Electrical Code.
electric power supply
Prior to making any line Voltage connections, service switch at
boiler should be in the OFF position and the power turned OFF at
the fuse box.
Run a separate 120 Volt circuit from a separate over current protec-
tion device in the electrical service entrance panel. This should be a
15 ampere circuit. A service switch has been pre-wired and located
on the exterior boiler jacket. See Figure 13 for diagram showing
location of service switch junction box and power supply connection
points. Connect black (hot) lead from the power supply to either
of the unused brass screws on the service switch. Connect the white
(neutral) lead from the power supply to the white screw on the ser-
vice switch. Connect the green (ground) lead from the power supply
to the ground (green) screw on the service switch. The receptacle on
the service switch is always powered regardless of whether the switch
is ON or OFF, and could be used as a power supply for an external
condensate pump if one is used.
The boiler, when installed, must be electrically grounded in accor-
dance with the requirements of the authority having jurisdiction or,
in the absence of such requirements, with the National Electrical
Code, ANSI/NFPA-70 and/or the Canadian Electrical Code Part 1,
CSA-C22.1, Electrical Code.
Run a 14 gauge or heavier copper wire from the boiler to a grounded
connection in the service panel or a properly driven and electrically
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 five feet above the floor on an inside
wall. It may be mounted directly on the wall or on a vertical mount-
ed outlet box. It should be sensing average room temperature.
Avoid the Following:
Set heat anticipator at 0.7 amps. Connect 24 Volt thermostat leads
to the two(2) yellow wires located in service switch junction box,
located on outer jacket of boiler. See Figure 13 for service switch
junction box and thermostat field wiring connections.

eleCTriCal Wiring

WARNING
grounded ground rod.
Connect Circulator pump Wiring
See Figure 13 (following page) for service switch junction box and
circulator pump field wiring connections. A 5 feet wiring harness
with flexible metal conduit is supplied to connect the circulator
pump to the service switch junction box. If the two 120 Volt circula-
tor wire terminals inside the junction box are not used, please leave
the two wire nuts to prevent the short circuit.
LABEL ALL WIRES PRIOR TO DISCONNECTION
WHEN SERVICING CONTROLS. WIRING ERRORS
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CAN CAUSE IMPROPER AND DANGEROUS
OPERATION. VERIFY PROPER OPERATION AFTER
SERVICING.
Things to Avoid when Locating Thermostats
Corners and alcoves
COLD SPOTS:
Concealed pipes or ducts
Stairwells - drafts
Unheated rooms on
other side of wall
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CAUTION
DEAD SPOTS:
Behind doors
HOT SPOTS:
Concealed pipes
Fireplace
TV sets
Radios
Lamps
Direct sunlight
Kitchens