Lennox Hearth 850,055M Indoor Fireplace User Manual


 
12
All instructions must be left in the possession of the user for safekeep-
ing. If at all possible, show the customer how to light and control the
appliance and how to remove and replace the glass facia.
After commissioning the appliance, the customer should be instructed
on the safe use of the appliance and the need for regular servicing. Fre-
quency of service depends on usage, but MUST be carried out at least
once annually. Advise that cleaning of the appliance may be achieved
when the appliance is cold using a damp cloth and mild detergent on
most surfaces.
Advise that the appliance will emit a "newness" smell for a time after
initial commissioning and that extra ventilation may be needed during
this time.
Advise the user to never place any objects on top of the appliance or
obstruction this area in any way.
A periodic visual check of the pilot flame and the burner flame should
be carried out.
21.0 SERVICING
Turn off the fireplace at the gas supply. Ensure that the fireplace is fully
cold before attempting service. A suggested procedure for servicing is
detailed as follows;
1. Lay out the dustsheet and tools.
2. Remove the front glass facia as described in section 17.0, only in
reverse.
3. Remove the glass door assembly (5 screws) and clean carefully.
Remove the valve cover plate (4 screws).
4. Inspect the burner and the catalysts and clean if necessary with a
soft brush.
5. Disconnect the gas supply.
IMPORTANT NOTE: This must be
done by a licensed plumber or gas fitter and must conform to
the requirements of the National Fuel Gas Code NFPA 54 / ANSI
Z223.1 - latest edition.
6. Undo the four screws retaining the burner support brackets to the
base and rear of the firebox.
7. Remove the burner unit, strip off the burner pipes and clean
thoroughly.
8. Clean the in-line restrictor, pilot assembly and the burner tube. Do
not attempt to remove the pilot injector as this can cause damage.
9. Re-assemble components.
10. Re-connect the gas supply. Turn on the gas supply and perform a
gas leak test using gas leak test solution. Check pilot and burner for
good ignition.
11. Refit the valve cover and retaining screws.
12. Refit the glass door assembly.
13. Refit the facia as described in section 16.0.
14. Check the purpose provided ventilation is unobstructed.
15. Light the appliance and test setting pressures.
16. Check safe operation of the appliance.
For specific servicing instructions, see relevant sections.
22.0 SERVICING THE BURNER
WARNING
Any change to this heater or its controls can be
dangerous.
First, remove the front Glass facia as described in Section 18.0 only in
reverse, remove the valve cover (4 screws) and disconnect the gas con-
nection inside appliance. The gas connections to the gas valve can now
be released. Undo the four screws retaining the burner brackets to the
base and rear of the firebox. The burner may now be removed.
Remove the pilot and main burner pipes and blow through to dislodge
any debris. Now remove the in line restrictor and blow through to make
sure it is entirely clear.
Unclip the pilot lint gauze and clean with a soft brush. Clean the exterior
of the pilot assembly with a soft brush and blow through the flame ports
on the pilot head. Check the aeration holes are free from lint or dirt. The
pilot assembly can be removed if required by disconnecting the electrode
HT lead, gas pipe, thermocouple lead and unscrewing the mounting
screws and lifting away. The pilot assembly is a non-serviceable item
and should not be taken apart. Aeration holes must be clear internally
for proper operation. NEVER MODIFY OR BEND THE THERMOCOUPLE
TO MAKE THE PILOT STAY LIT. Modifications are dangerous and can
have serious unseen effects on safety. If the pilot will not stay lit there
is a problem with dirt, the gas supply to it, or the thermocouple needs
replacement.
The gas valve is a non-serviceable item. If this needs replacement,
remove the cover plate then the securing screw holding the valve bracket
in place, remove all pipe unions, and the complete valve. Replacement
must be original manufacturers parts.
Re-assemble in the reverse of removal. Ensure setting pressures are as
stated in Table 1 on Page 3.
WARNING
Turn off the appliance and allow to cool before cleaning.
Verify proper operation after servicing.
23.0 PILOT ASSEMBLY
WARNING
No adjustments are to be made to the ODS pilot
system. Tampering with this system can be extremely
hazardous.
WARNING
You must keep control areas, burners and circulating air
passageways of appliance clean. Failure to keep the
primary air opening(s) of the burner clear may result
in sooting and property damage. Inspect these areas of
appliance before each use. Have appliance inspected
yearly by a qualified service person. Appliance may
need more frequent cleaning due to excessive lint form
carpeting, bedding material, etc.
Remove the glass facia, glass panel and burner unit (as per servicing
section), lint arrestor and pilot assembly by using a screwdriver to
remove the retaining screws.
20.0 BRIEFING THE CUSTOMER
WARNING
Do not add logs or ornaments such as pine cones,
vermiculite or rock wool. Using these added items
can cause sooting.