Thermostat Wiring - Crown Boiler FWZ060 Installation Instructions Manual

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x When making low voltage connections, make sure that no external power source
is present in the thermostat circuits. If such a power source is present, it could
destroy the boiler's control. One example of an external power source that could
be inadvertently connected to the low voltage connections is a transformer in old

thermostat wiring.

x Do not attempt to use EnviraCOM connections for any purpose not explicitly permitted
by Crown Boiler Company. Attempting to do so may result in unreliable operation and/
or damage to controls.
x Do not use the transformer provided on the boiler to power external devices such as
zone valves. Doing so may cause damage to the transformer.
CAUTION
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