Trouble Shooting Mendota Gas Dxv Fireplace - Mendota DXV-42 Installation & Operating Instructions Manual

TROUBLE SHOOTING MENDOTA GAS DXV FIREPLACE

SYMPTOM
1. Thin black coating (soot)
forms on viewing glass.
2. Humming or whistling
coming from Fireplace.
3. A change in flame appear-
ance or burner operation.
During initial installation the burner should be removed by qualified person and the air shutter opening checked to be
certain that the shutter is set correctly at 1/8" to 1/4" open for Natural gas and 1/2" minimum open for L.P. gas.
NOTE: For altitudes above 4,000 ft., some variations may be required.
Be sure burner and logs are properly installed (see pg. 20-24). After burner has been properly installed and operated
for two to three hours, small additional adjustments to the air shutter may be necessary for final flame appearance.
These small shutter adjustments can be made by the following procedure:
NOTE: Very small changes in shutter settings make major changes in flame appearance.
1. Air shutter control is located behind the lower grill.
2.
If flame is too "blue," push air shutter knob in (close) in small 1/8" increments until flame turns desired realistic "or-
ange."
3. If flame is too "orange" or is causing sooting on viewing glass pull shutter knob out (open) approx. 1/8" in-
crements until sooting stops. IF SOOTING DOES NOT STOP, TURN OFF UNIT AND CALL YOUR
MENDOTA SERVICE PERSON.
IMPORTANT: Try each new shutter setting approx. ½ hour before making additional changes. NOTE: Changes in
front burner flame can be made by re-arranging the coals
CAUTION: Any changes in pilot flame must be made by qualified person and checked with volt meter.
PROBABLE CAUSES
A. Incorrect gas pressure
B. Not enough combustion air
A. Normal operating noise.
A. A change in gas pressure.
B. Carbon dirt or lint.
FIGURE 7: Air Shutter
MAIN BURNER GAS FLAME ADJUSTMENT
2
8
CORRECTIVE ACTION
Have gas supplier check for correct gas pressure (7" W.C.
Nat. Gas; 11" W.C. LP Gas).
If sooting continues open air shutter on burner (see "Gas
Flame Adjustment" below).
If sooting still continues, shut off unit and call Mendota
service person.
NOTE: To clean glass - remove glass and wipe glass with
cloth or paper towel.
Some noise is normal. It is caused by the gas supply flow-
ing through the gas orifice. It is expected from any gas
fireplace. The noise can be reduced by turning the Hi/Lo
Knob on the control. Turning down the flame will reduce
the heat output of the unit.
Have your gas supplier check for correct gas 7" W.C. Nat.
Gas; 11" W.C. LP Gas). If flame still needs adjustment see
"Flame Adjustment" below.
Clean out carbon, spider webs, lint, etc. from shutter area.
Logs and burner.
NEVER BLOCK AIR INTAKE OR OUTLET VENTS.