Owner`s manual

51
SERVICING AND CLEANING (cont.)
AIR SHUTTER ADJUSTMENT
The following should only be performed, if required, by a qualifi ed
professional service technician. Service requires the gas and
electrical power to be on.
The air shutters regulate the amount of primary air the burners
receive, which affects fl ame appearance. The air shutters are
preset at the factory based upon the gas the appliance is designed
to burn. However, certain conditions may require air shutter fi eld
adjustment for proper combustion and fl ame presentation.
The appliance should burn for approximately 15 minutes.
By this time, the fl ames should be blue at the base and a
combination of blue/yellow at the body and tips. Adjust the air
shutter as needed.
CAUTION: Excessive sooting will occur when the air shutter(s)
are closed too much. Lifting of the fl ame from the
burner will occur when the air shutter(s) are open
too much. Adjust accordingly.
Air Shutter Adjustment Handle
D1-25 burners, and D1-30/36 rear burners are equipped with a
wire handle to easily adjust the air shutter.
The air shutter adjustment handle is located at the bottom front
of the unit. To gain access, remove the fi ne mesh barrier screen.
If a 4 piece surround is installed, it must be removed.
Note: 3 piece surrounds do not require removal.
1. Ignite the burner.
2. Using needle nose pliers, gently grab the adjustment handle,
and push/pull the wire as needed. Pull to open, push to close.
See Fig. 51-1.
More air will result in shorter fl ames and less color, less air
will result in bigger fl ames and more color.
Note: Make minimal adjustments. Very small changes result in
major changes in fl ame appearance.
3. Observe the fl ames. Repeat the adjustment process until
the proper fl ame is achieved.
4. Be sure to properly re-install all appliance components.
Air Shutter Adjustment via Burner Removal
Note: It is not recommended to adjust D1-30/36 front burners
(to maintain proper operation).
1. Completely shut down the burner. Allow the appliance to
completely cool.
Fig. 51-1 Air shutter adjustment handle
Fig. 51-2 Proper fl ame appearance
Air Shutter Factory Settings
Nat. L.P.
D1-25: Burner
1
/
4
" open
9
/
16
" open
D1-30: Front burner Fully open Fully open
D1-30: Rear burner
1
/
8
" open
5
/
16
" open
D1-36: Front burner Fully open Fully open
D1-36: Rear burner
1
/
4
" open
1
/
2
" open
Fig. 51-3 Remove screen & fl oor panels
Remove
A
B
Adjustment
handle
PULL to open
PUSH to close