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5. Open the fuel valve on the fuel tank, turn the main power switch on the control
panel to the “ON” position and this will start the pump and send power to the furnace.
After a 30 second delay the furnace will attemp to light .
6. The TCH250 uses a mixing valve to control the output temperature to the supply
manifold. The valve is electronically controlled by the PLC. .
The temperature setpoint is adjustable by the user from 70° F to 180° F. The PLC
display screen will display the setpoint and current temperatures of each of the return
ports.
Valve shown in open position