13
3-90-08326R35_11/14
Combustion Motor Speed Control Low draft only set
point.
The small straight screwdriver slot is plastic; therefore, the
unit can be adjusted while in operation.
These units are pre-tested at the factory with exactly 120 VAC,
60 Hz. They are checked and adjusted for firebox tightness,
gasket leakage, motor operation and igniter operation. The
Accentra is then factory set at a high adjustment.
NOTE: low draft adjustment may be required. The
factory low draft setting may not be correct for the units
permanent installation conditions.
The control board on the Accentra is equipped with a low
draft adjustment port. Located on the control face just to
the left of the igniter light. Fig. 15. 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 achieve the most
efficient burn on low burn or "maintenance". This voltage
adjustment allows the installer to change the low voltage
set point approximately 15 volts. This adjustment should
be done by the installer during set up because a draft meter
reading is
required
to ensure 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 efficiency is lost.
If the unit is adjusted too low, the low draft pressure switch
will not allow the feeder motor or the igniter to operate.
A simple draft test should be performed after completing the
flue pipe installation. Record the results for future reference:
1. Plug unit into a 120 VAC, 60 Hz outlet.
2. Close the hopper lid and front view door. 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 -.45 to
-.55) The control will be on the High Draft for a total of 1
minute.
5. After 1 minute, the combustion motor will go down to low
draft and the distribution blower will go on high. Allow
approximately 15 seconds to pass for the combustion
motor to slow before checking the low draft.
6. If the low draft is between .30 and .35, 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: In some cases, the draft may not go as low as .30
even with the set screw completely counter-clockwise.
Fig. 15
Fig. 16
low draft voltage Adjustment
The rear panel will need to be removed prior to installing the draft
meter to the barbed tee Fig. 16. Be sure to hold the barbed tee while
removing the plug cover. Replace plug cover after draft test.
MAGNEHELIC
INCHES OF WATER
0
.10
.20
.30
.40
.50
Summary of Contents for Accentra Freestanding Pellet Stove
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