Crown Boiler BWF Series, Supplement Manual

Page: 5 / 24

3
Option Plug c) - Used to connect Crown #761000 optional LWCO kit. If this kit is not installed, the factory supplied
jumper plug shown in Figure 9.1 must be installed for boiler to operate.
EnviraCOM d) - Used to connect EnviraCom thermostat or other EnviraCom device approved by Crown for use with this
boiler.
CAUTION
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.
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.
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.
FIGURE 9.0: LINE VOLTAGE CONNECTIONS
FIGURE 9.1: LOW VOLTAGE CONNECTIONS