Service manual

Stove Operation - Circuit Board

dHC 4100 sTarT-uP sequenCe (15 minuTes) - manual mode, FaCTory seTTing:

NOTE: No Thermostat or Wall Switch - Manual Control Only

1. Push the ON/OFF button to start. The stove may take up to 30 seconds to establish rebox vacuum.

2. The Auger Light will flash with each pulse of the auger (the auger feed rate is pre-programmed during

start-up).

3. The combustion blower comes on at full speed.

4. a. The ignitor comes on.

b. The convection blower stays off.

c. The heat level indicator will show the heat level that the stove will run at after start-up.

d. The operator has no control over the start-up sequence. The operator can press and hold the

manual feed button to run the auger continuously for 60 seconds and then will have to press again for

another 60 seconds. The operator can also pre-set the heat output setting for operation. When the

unit reaches operating temperature the heat output will go to that setting.

5. a. The unit should light after 5 to 12 minutes.

b. Once the 120°F (49°C) exhaust temperature sensor closes, the convection blower will come on.

6. Fifteen minutes after pushing the start button, the Mode light will change to solid. This signals that the

unit is at operating temperature and control is returned to the user.

7. The Auger Light will continue to flash to the corresponding Heat Level setting. The Heat Level Indicator

will show the Heat Level that the stove will run at after start-up and can be adjusted but the change

will not take affect until the start -up has finished.

8. The convection blower (room air blower) will turn on.

dHC 4100 normal oPeraTion - manual mode, FaCTory seTTing:

The operator can now set the heat output, low feed trim, and whether the convection blower is ON or

OFF (depending on model).

The combustion fan trim changes exhaust voltage incrementally on all heat levels. When this button

is pressed, all the lights come on except the one that is the set point. This will indicate what setting it

is on before adjustment. Hold the button down and press the up or down arrow to adjust the setting.

Depending on the model, the convection blower can be turned OFF by depressing the convection blower

control button. For the best efficiency, the convection blower should be left on at all times.

Feed trim changes ‘ON’ time in 0.25 sec. increments for each feed settings. Position #4 is the factory

default setting, there is one (1) setting up and three (3) settings down. When this button is pressed all

the lights come on except the one that is the set point. This will indicate what setting it is on before

adjustment. Hold ‘Feed Rate Trim’ button down and press the up or down arrow to adjust setting. Trim

settings are still maintained after loss of power.

dHC 4100 sHuT down - manual mode, FaCTory seTTing:

1. Push ON/OFF button to turn stove off.

2. All the lights will turn off

3. The auger will stop feeding

The combustion blower goes to full speed until the exhaust temperature sensor opens, stopping all motors.