Enviro EF2 Service Manual

1. Install the Low Voltage
Thermostat (maximum 24V) in
a location that is not to close
too the unit but will effectively
monitor the desired area to be
heated.
2. Open the right cab side to
expose thermostat wires and
disconnect. Install 18 gauge
(see
Wiring diagram section)
or heavier wire through the
grommet in the back, from
the stove to the thermostat.
Connect thermostat wires to
red wires provided or remove
if desired.
3. To set the thermostat jumper
to the desired mode, remove
the two (2) screws holding the
circuit board control panel in
place. Lower the board and
pull out to change jumper.
Figure 12: Setting the Thermostat mode Pins on DHC 2000 Board.
Stove Controls
A) HI / LOW: When the jumper is placed on only
one of the J9 pins, then the control board is in a
HI / LOW mode of thermostat operation (factory
setting).
B) ON / OFF: If both pins of J9 are jumped
(covered), the control board is in an ON / OFF
mode of thermostat operation.
Remove jumper wire
and install thermostat
wires here
CirCuiT Board seT-uP - dHC 2000:
The 2000 series boards are most recognizable by the 2 fuses and no slide switch.
HI / LOW OPERATION (Factory Setting): One pin is covered, as shown as ‘A’ in Figure 10. When the
jumper J9 is not jumped then the control board is in a HI / LOW mode operation. If the unit has been
placed in the HI / LOW mode, the unit will be taken to a low or idle setting when the thermostat is not
calling for heat. When the thermostat calls for heat, the unit will go to the setting that is displayed on
the control board Heat Indicator. If the heating load is not great enough when the stove is on low, the
exhaust temperature switch will turn the stove off.
ON / OFF OPERATION: Both pins are covered, as shown as ‘B’ in Figure 10. If the control board
is placed with J9 jumped then the control board is in a ON / OFF mode of operation. In the ON /OFF
thermostat mode, when the thermostat calls for heat, the unit will go through an ignition sequence and
light the stove. Once lit the unit will operate at the selected setting displayed on the control board Heat
Output Indicator. Once the thermostat stops calling for heat, the unit will stop feeding pellets and begin
its shut down sequence until cold then turn off.
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Enviro EF2 Specifications

General

Brand	Enviro
Model	EF2
Category	Stove
Language	English