3.11 BI-ENERGY SETUP
To take advantage of a special domestic electric utility rate, your COMBOMAXMC boiler can be combined with an existing oil or gas-fired furnace. Please contact your utility to make sure your building is eligible and to find out about the new wiring configuration. Please refer to figures 7 and 8 for the set-up required.
The CBE-EM bi-energy switching control (available as an option) is especially designed to satisfy utility requirements. The CBE-EM control selects the cheapest energy source according to the outdoor temperature, the indoor temperature setting and any signal provided by the utility.
The CBE-EM bi-energy control starts up the oil burner upon receiving the appropriate signal, even if the thermostat is sending no heating signal. The oil burner stops when the boiler reaches its high-limit point. For this reason, the plumbing system must be equipped with a flow check valve or zone valves.
The 3-way zone valve (1’’ NPT F) which comes with the CBE-EM control, directs the heating water to the oil burner or the COMBOMAXMC unit depending on the signal sent to it by the external bi-energy sensor. Thus, your oil burner can cool down while eliminating energy losses up the chimney or by conduction in the furnace room .
COMBOMAXMC Electric boiler Set-up, use and care guide (revised January 2006), Page 9.
