Lennox Hearth ELITE VISN-25/35 - Manuel (Page 24)

24
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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.
CAUTION: Label all wires prior to disconnection when servic-
ing controls. Wiring errors can cause improper and dangerous
operation.
ATTENTION: Au moment de l'entretien des commandes,
étiquetez tous les fils avant de les débrancher. Des erreurs
de cáblage peuvent entraîner un fonctionnement inadéquat et
dangereux.
Maintenance Checklist:
The following should only be performed by a qualified service
technician.
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.
Millivolt and System Checks
Check
Test
To
Test
Connect
Meter
Leads to
Terminals
Thermostat
Connects
Meter Read-
ing
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 27 - Wiring Terminals
Figure 28
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 Pages 13, 14 and 15 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.
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 elements
for corrosion. These will appear as rust spots, streaks, or, in extreme
cases, holes. These components 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 fittings.
It may be caused by having excessive lateral runs, too many elbows,
or exterior portions of the system being exposed to cold weather.
4. Inspect joints to verify that no pipe sections or fittings have been dis­
turbed and consequently loosened. Also check mechanical supports
such as wall straps or plumbers’ tape for rigidity.
Proper Pilot Flame Appearance