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Figure 5. Electrical Connections
Figure 6. DHW Connections
5
EH-M2-40 Boiler Operation and Installation Instructions
Mode 4
Factory
Installed
Boiler
Outlet
Sensor
Boiler outlet
sensor factory
wired and
Mode 5
installed in
cast iron heat
exchanger
Factory
Installed
Boiler
Outlet
Sensor
Figure 5A. Sensor Location (See EM-10 Manual for details)
Outdoor
BTC
Sensor
Relay
Boiler Inlet Sensor (Included)
Outdoor
BTC
Sensor
Relay
Secondary
Piping
Sensor
(Included)
Boiler Inlet Sensor (Optional)
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