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water boiler
Connect wiring
General wiring requirements
Installations must follow these codes:
• United States:
National Electrical Code, ANSI/NFPA 70, latest
edition and any additional national, state or local
codes.
• Canada:
CSA C.1 Canadian Electrical Code Part 1 and any
local codes.
Wire requirements
• Wiring must be N.E.C. Class 1.
• If original wire supplied with boiler must be re-
placed, type 10 °C wire or equivalent must be
used.
• Supply wiring:
• Boiler only — 14 gauge or heavier.
• Boiler with optional AFM — 1 gauge.
Electrical requirements
• Boilers not equipped with an AFM can be supplied
by a 1-amp service.
• Boilers equipped with an AFM require a 0-amp
service.
Electrical grounding
• Provide electrical ground at boiler as required by
codes.
Wiring entrances (see Figure 13)
Terminal strip access
• Remove the two retainer screws in the jacket top
panel (at rear of the boiler) and remove the jacket
top panel.
• Release the Control Pod cover by loosening the
retainer screw in the top center of the cover. Swing
the cover open to reveal the boiler terminal strip.
• Remove the Control Pod cover to facilitate wire
routing. (To remove, push the Control Pod cover to
one side, and gently work the cover retainer hinge
on the other side out of the jacket slot.)
18
— Boiler Manual
Electric shock hazard
. Can cause severe
personal injury or death if power source,
including service switch on boiler, is not
disconnected before installing or servic-
ing.
Figure 13 Terminal strip access
120-volt wiring
Conduits
• Connect each conduit supplying line-voltage wiring
to or from the boiler to a conduit opening in the
upper portion of the jacket rear panel.
• All field-provided line-voltage wiring must be
sheathed in flexible metal conduit.
Additional limits
• If required by state or local codes, provide additional
limits as needed.
• When using additional limits, remove the factory-
installed jumper between boiler terminal strip ter-
minals 18 and 19.
• Connect the additional limits in series and wire to
boiler terminal strip terminals 18 and 19.
Part number 550-141-986/1005
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