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9.8
Set the thermostat above the room temperature. The system should start.
9.9
Make sure the pump starts running as soon as the system starts.
9.10
Heating stages will be switched ON in sequence at 30 second intervals, confirmed by green lights on the
left hand side of the PC board on the TH600 or by red lights on the right hand side on the D22-B.
9.11
Wait for two minutes and measure the current drawn by the boiler and compare it with the one shown on
the nameplate.
9.12
When the required maximum water temperature selected on the aquastat (0-10) or controlled by the
outdoor sensor is reached, the electronic controller will modulate the boiler capacity to maintain the water
temperature, as long as the demand for heating is not satisfied. The bottom green light flashes
continuously on the TH600 or one of the red lights on the D22-B to indicate that the boiler is maintaining
the setpoint. When the room thermostat is satisfied, the heating stages will come OFF in sequence at 5
second intervals.
9.13
Set the room thermostat to the desired set point.
9.14
The boiler is now ready and functional.
Extra test steps for Electric with Fossil Fuel Backup Boiler installation
9.15
Disconnect the room thermostat wires from the existing boiler and connect them to "C" and "W1" terminals
on the electronic board of the electric boiler.
9.16
Connect two (2) wires from "B / B" control terminals of the electronic board on the electric boiler to the
T T (thermostat) terminals of the existing boiler.
9.17
Terminals "S1 / S2" on the electronic board should receive the utility Load Management Control wires.
9.18
Connect the pump terminals "P / P" in parallel to the existing thermostatic pump control as per wiring
diagram on page 23 to allow the operation of the pump in any of the "Dual-Energy" modes selected.
9.19
When the system is opperating in Fossil Fuel mode, the supply water temperature of the fossil fuel boiler
should never exceed 190°F which may trip the manual high limit in the electric boiler.
10
Test sequence for FFB Boiler systems
10.1
An FFB boiler is supplied with a three-position mode selector switch. Because of differences in regional
regulations, the electronic board has been factory set so as to allow the activation of the electric mode
depending on the unit destination. In the "Gas / Oil" position the thermostat will call upon the gas or oil
boiler or furnace to maintain the house temperature at the desired level. The "Dual-Energy" mode gives
automatic control to the outdoor sensor or alternate switching signals from the local utility for Load
Management control. When the Load Management contacts are closed, the "Electric" mode is selected.
When these contacts are open, the "Gas / Oil" mode is selected. A green pilot light indicates the mode
that has been selected.
OIL / GAS
DUAL ENERGY
Fig. 6
Heating by means of Fossil Fuel Boiler
Do not use the middle position
Dual-Energy mode - Electric is primary source of heat.
May be controlled by utility company.
Page 7
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