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21
Field-Connected Controllers
It is strongly recommended that all individually-pow-
ered control modules and the heater should be
supplied from the same power source.
Check the Power Source
NOTE: Field-supplied isolation relays should be
installed when field-connected controllers are
mounted more than 50 equivalent feet (18 Ga) from
heater.
WARNING: Using a multi-meter, check the
following voltages at the circuit breaker panel prior to
connecting any equipment. Make sure proper
polarity is followed and house ground is proven.
(See Fig. 17.)