20
P68 Pellet Stove
These units are pre-tested at the factory with
exactly 120 Volts A.C., 60 Hz. They are checked and
adjusted for firebox tightness, gasket leakage, motor
operation and igniter operation. The P68 is then factory
set at a mid-point adjustment and in most cases will not
need any adjustments.
NOTE: The factory low draft
setting may not be correct for the unit's permanent
installation conditions.
The control board on the P68 is equipped with a
low draft adjustment port. Located on the control face
just to the right of the igniter light. This voltage adjustment
is provided to allow the unit to be adjusted for the
household voltage where the unit is going to be in
permanent operation.
NOTE: The line voltage varies
from area to area and often home to home.
The low draft voltage should be adjusted to
a chie ve the mos t ef ficient burn o n lo w burn o r
"maintenance". This voltage adjustment allows the
installer to change the low voltage set point approximately
10 volts. This adjustment should be done by the installer
during set up because a draft meter reading is
required
to insure proper set up.
If the unit is not adjusted properly, it does not
cause a safety concern. If the unit is adjusted too high,
only effiency is lost. If the unit is adjusted too low, the low
draft pressure switch will not allow the feed motor or the
igniter to operate.
Fig.1
C o m b u s t i o n
Motor Spee d
Control
Low draft only
set point.
The small straight
screwdriver slot is
plastic; therefore,
the unit can be
adjusted while in
operation.
Fig.22
Fig. 23
A simple draft test should be performed after
completing the flue pipe installation. To record the results
for future reference:
1. Plug unit into a 120VAC, 60 HZ outlet.
2. Close the hopper lid, front view door, and the ash
pan. Neither pellets or a fire are required for this test.
3. With the mode selector in the "OFF" position, turn
the feed adjuster to "TEST".
4. Record the high draft_____in W.C. (Normal is -.50 to
-.60) The control will be on the High Draft for a total of 2
minutes.
5. After 2 minutes, the combustion motor will go down
to low draft and the distribution blower will go on high.
Allow approximately 15 sec onds to pas s f or the
combustion motor to slow before checking the low draft.
6. If the low draft is between -.35 and -.45, record the
reading _____ in W.C. If the reading is higher, slowly
turn the set screw counter-clockwise until the draft
lowers. If the reading is lower, very slowly turn the set
screw clockwise until the draft increases.
NOTE: The test mode alternates from high to low
draft every 60 seconds. If more time is needed for
draft adjustment, wait until the next low draft cycle.
NOTE: In some cases, the draft may not go as low
as -.35 to -.45 even with the set screw completely
counter-clockwise, ideally, you should just set it as
low as possible.
Low Draft Voltage Adjustment
Draft Meter bolt
hole location
On a P68
the draft test hole is
under the left rear
corner
of
the
firebox.
P68 Low Draft Voltage Adjustment
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