Electrical Wiring - Dunkirk PWXL Installation, Operation & Maintenance Manual

Turn off electrical power at fuse box before
!
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/NFPA-70, latest revision.
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 115 Volt circuit from a separate over
current protective device in the electrical service entrance
panel. This should be a 15 ampere circuit. A service switch
has been provided and should be mounted to the Junction
box located on the exterior boiler jacket. see Fig. 16-1 for
diagram showing power supply connection points.
The boiler, when installed, must be electrically bonded
to ground in accordance with the requirements of the
authority having jurisdiction or, in the absence of such
requirements, with the National Electrical Code, ANSI/NFPA
70.
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 grounded ground rod.
Install Your Thermostat
All low volt interconnect wiring must be at
least 18 AWG.
The thermostat location has an important effect on the
operation of your boiler system. BE SURE TO FOLLOW THE
INSTRUCTIONS INCLUDED WITH YOUR THERMOSTAT. Lo-
cate the thermostat about fi ve feet (5') 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 aver-
age room temperature.

ELECTRICAL WIRING

WARNING
NOTICE
THERMOSTAT LOCATIONS TO AVOID
DEAD SPOTS HOT SPOTS
Concealed pipes
Behind doors
Corners &
alcoves
Direct sunlight
Connect 24 Volt thermostat leads to the white (TW)
and red (TR) wires located in service switch junction
box, located on outer jacket of boiler see Fig.16-1
for service switch junction box and thermostat fi eld
wiring connections.
Vent Damper Wiring
The boiler is equipped with a factory wired harness with
4 pin Molex plug, that plugs into a 4 pin Molex receptacle
inside the vent damper operator. The vent damper must
be connected for the boiler to operate. Follow the wiring
diagram follow for the various different models.
Label all wires prior to disconnection when
!
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
Connect Circulator Pump Wiring
See Fig. 16 -1 for line voltage, thermostat and circulator
pump fi eld wiring connections. A fi ve (5) foot wiring
harness with fl exible metal conduit is supplied to connect
the circulator pump to the service switch junction box.
If the two 120 Volt circulator wire terminals inside the
junction box are not used, do not remove the two wire nuts
to prevent a short circuit.
16
COLD SPOTS
Concealed pipes
or ducts
Fireplace
TV sets Stairwells - draft s
Radios Doors - draft s
Lamps
Unheated room on
other side of wall
Kitchens
CAUTION