Lennox Hearth ELITE VINT-DVS-U - Manual (Page 24)

24
CAUTION: Wear gloves and safety glasses for protection while
doing required maintenance.
Verify proper operation after servicing.
S'assurer que l'appareil fonctionne adéquatement une fois
l'entretien terminé.
Maintenance Checklist:
The following should only be performed by a qualified service
technician.
CAUTION: Label all wires prior to disconnection when servic-
ing controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
1. Annual inspection should be made and the following checks
performed:
o When unit is cool, open glass viewing door and inspect burner for
dirt, soot and lint accumulations and remove if necessary. If exces­
sive soot accumulation is present on burner, have a qualified service
technician adjust burner for proper combustion.
o Clean inside of glass viewing door with gas fireplace glass cleaner.
NEVER attempt to open door or clean glass when unit is hot.
o Check the hot air outlet vents for lint or other accumulations. Never
block or restrict vent openings or obstruct flow of ventilation air.
o Check that direct­vent pipe, air intake and flue are open and free of
soot, blockage, or debris.
o Check gaskets once a year. Gaskets must be tight. Replace if neces­
sary.
o Inspect the pilot system for proper flame. NEVER ADJUST THE PILOT
until after the gas pressure has been checked and supply lines have
been completely bled (this may take an hour or more when bleeding
through the pilot). All pilots are checked and burned at the factory
prior to shipment. The pilot adjustment screw is located to the lower
left of the flame height control knob.
.25 Adjust the pilot screw to properly size the flames. The flames
should completely surround the thermopile and thermocouple and
extend across the main burner tube ports. Be careful not to back
the screw out of its threads.
o Check that the area around the stove is kept clear and is free of
combustible materials, gasoline and other flammable vapors and
liquids.
o Check the millivolt system as per the table on this page.
Figure 35
Millivolt and System Checks
Check
Test
To
Test
Connect
Meter
Leads to
Terminals
Thermostat
Connects
Meter
Reading
Should Be
A Complete
System
2 & 3 Closed 100 MV
or More
B Thermopile
Output
1 & 2 Open Greater
Than
325 MV
C System
Resistance
2 & 3 Closed 2.5 Ohms
See Figure 34 - Wiring Terminals
2. The viewing glass should be cleaned periodically (see Glass Door
Cleaning and Maintenance).
3. Should repairs or maintenance of the stove require the disassem-
bly of the vent/air intake system, the reassembly and resealing
should be completed by a qualified service technician and follow
the instructions on Page 12 of this manual.
MAINTENANCE AND SERVICING
WARNING
Turn off gas and electrical power to the fireplace
and allow it to cool before cleaning or servicing
the appliance.
General Vent Pipe Maintenance
Conduct an inspection of the venting system semi­annually. Recommended
areas to inspect are as follows:
1. Check areas of the venting system which are exposed to the ele­
ments for corrosion. These will appear as rust spots or streaks and
in extreme cases, holes. These component should immediately be
replaced.
2. Remove the cap and shine a flashlight down the vent. Remove any
bird nests or other foreign material.
3. Check for evidence of excessive condensate, such as water droplets
forming in the inner liner and subsequently dripping out at joints.
Continuous condensate can cause corrosion of caps, pipe and fit­
tings. It may be caused by having excessive lateral runs, too many
elbows and exterior portions of the system being exposed to cold
weather.
4. Inspect joints to verify that no pipe sections or fittings have been
disturbed and consequently loosened. Also check mechanical sup­
ports such as wall straps or plumbers’ tape for rigidity.
Proper Pilot Flame Appearance