Service manual

5
A qualified service technician should follow this
procedure when inspecting and cleaning the
heat exchanger and vent pipe.
1. Turn off electrical power and close main
manual gas shut-off and allow appliance
to cool down
2. Remove the vent pipe running to
chimney. Remove top outer panel and
flue collector access panel. Check heat
exchanger, vent and chimney for
obstruction and clean as necessary.
3. Remove burner from appliance and
vacuum the heat exchanger. If heat
exchanger is excessively dirty it may be
necessary to remove it from the
appliance and wash it down with proper
detergent cleaner. Be aware that the
combustion chamber base is insulated
with ½” thick ceramic blanket. If this
material is damaged or displaced it must
be replaced before starting up the
appliance.
4. Reinstall parts removed in steps 2 and
3. Be sure that vent pipe has proper
pitch and is properly sealed. Repair or
replace any gaskets, which may have
been damaged in steps 2 and 3.
5. CAUTION: When replacing the burner
be careful to fully engage the back of
the burner box into the retaining slot in
the combustion chamber base. Failure
to properly locate the burner will result in
erratic flame operation with the
possibility of delayed ignition on light off.
Once in place make sure that the burner
box is sealed against the seal gasket
provided at the mixing tube.
6. Restore electrical power and gas supply
to the appliance.
7. Place appliance in operation using
lighting instructions provided.
8. While the appliance is operating, check
for flue gas leaks and proper vent
operation. Seal any flue gas leaks using
appropriate gasket or sealing material.
Carefully examine the flue collector
access panel and heat exchanger ends.
The MicoFlame Grande is category 1, 85%
efficient when supplied as a non-condensing
appliance. When supplied with the optional
condensing cartridge, the MicoFlame Grande is
95% efficient and is considered to be a category
II or IV appliance. Three venting options are
available for this appliance in both condensing
and non-condensing configurations. See Figure
2 for details. (Please refer to Table 3 for vent
dimensions)
Figure 2: Venting Arrangement
6.1 OUTDOOR VENTING
When fitted with the factory supplied rain shields
and UL approved vent cap, the MicoFlame
Grande is self-venting. The following applies to
outdoor installations:
1. Use only factory supplied rain shields.
2. Periodically check to ensure that air
intake and vent cap are not obstructed.
3. Locate appliance at least 3 feet away
from any overhang.
4. Locate appliance at least ten feet from
building air intake.
5. Avoid installation in areas where runoff
from adjacent building can spill onto
appliance.