Troubleshooting Mendota Gas Dxv Fireplace - Mendota DXV-45 DT4 Installation & Operating Instructions Manual

TROUBLESHOOTING 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 ap-
pearance or burner operation.
MAIN BURNER GAS FLAME ADJUSTMENT
During initial installation the burner should be removed and veri-
fied that the air shutter opening is set correctly at 1/8" to 1/4"
open for Natural gas and 1/4" - 1/2" minimum open for L.P.
gas.
NOTE: For altitudes above 5,000 ft., some variations may be
required.
Be sure burner and logs are properly installed. 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.
Air shutter knob is located behind the lower grill.
If flame is too "blue" slowly push air shutter control knob in small
1/16" increments until flame turns desired realistic "orange."
If flame is too "orange" or is causing sooting on viewing glass or
on logs, pull air shutter control knob outward in 1/16" increments until sooting stops. IF SOOTING DOES NOT STOP,
TURN OFF UNIT AND CALL YOUR MENDOTA SERVICE PERSON.
The front coal bed burner is pre-set at 1/8" open. Normally, no adjustment is required. For LPG applications, a slightly
larger (greater than 1/8" opening in the front burner air shutter may be required if soot deposits on front logs or on coal
chunks).
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. (See pg.22)
CAUTION: Any changes in pilot flame must be made by qualified person and checked with voltmeter.
40
PROBABLE CAUSES
A. Incorrect gas
pressure
B. Not enough
combustion air
A. Normal operating
noise. (See "Quiet Oper-
ation" pg. 25)
A. A change in gas
pressure.
B. Carbon dirt or lint.
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 Mendo-
ta 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
flowing through the gas orifice. It is expected from
any gas fireplace. The noise can be reduced by turn-
ing 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.
Pull Out Opens,
Push in Closes.
REAR BURNER
SHUTTER KNOB