20 P68 Pellet Stove
These units are pre- tested at the facto ry with
exactly 120 Volts A.C., 60 Hz. They are checked a nd
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 f actory 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 p rovided to allow the unit to be a djusted f or the
household voltage where the unit is going to be in
permanent operation. NOTE: The line volt age varies
from area to area and often home to home.
The lo w draf t vo ltage s hould be adjus ted to
achi eve t he mos t eff icie nt burn o n low bur n or
"maintena nce". This voltage adjus tment a llows t he
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

Co m b u s t i o n
Moto r 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 draf t test should be perf ormed after
completing the flue pipe installation. To record the results
for future reference:
1. Plug unit into a 120VAC, 60 HZ outlet.
2. C lose the hopper lid, fro nt view door, and the ash
pan. Neither pellets or a fire are required for this test.
3. W ith 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 appro ximat ely 15 sec onds to pas s for t he
combustion motor to slow before checking the low draft.
6. If the low draft is between -.35 and -.45, rec ord the
reading _____ in W.C. If the reading is higher, slowly
turn the set scre w counter- clockwise until t he draf t
lowers. If the reading is lower, very slowly turn the set
screw clockwise until the draft increases.
NOTE: The test mode alternates from hi gh 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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