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Benchmark Series Boilers Pre-Installation Electrical Power Guide
FUSE
TERMINAL
POWER
TRANSFORMER
BLOCKS
BREAKER
BLOCKS
24 VDC
12V
POWER
POWER
SUPPLY
SUPPLY
Figure 4b: Power Box Components, BMK2500 – 6000 – INTERNATIONAL
3. PROVISIONS FOR SERVICE
Designers must provide emergency shutoffs and other devices to satisfy electrical codes. It is also
recommended to provide an electrical shutoff disconnect switch of suitable load carrying
characteristics near each BMK boiler. No electrical boxes or field components should be mounted to
the surface of the boiler or where they would interfere with the removal of the side or top panels for
maintenance. The service disconnect switch should be mounted near the unit, as illustrated in
Diagram 1. Wiring conduit, EMT, or other wiring paths should not be secured to the unit but supported
externally. Electricians should be instructed as to where the wiring conduit should be located, such as
away from the relief valve discharge, drains, etc. All electrical conduit and hardware should be
installed so that it does not interfere with the removal of any covers, inhibit service or maintenance, or
prevent access between the unit and walls or another unit.
TAG-0048_Q • 5/16/2023
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 6 of 11
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