18
Maintenance And Service
Figure 22:
Orifice Location
4. Remove the pilot cover from the
pilot assembly (see Figure 23).
5.
Convert the existing pilot orifice
using a 7/16 inch wrench. Loosen
the pilot head, rotate counter
clockwise and fully remove.
Remove the existing orifice and
replace with the one supplied in
the kit (Figure 24). Re-install the
pilot head and tighten back to its
original position (Figure 25).
6.
Convert the gas valve:
a) Remove the existing stepper
motor using a T-20 screwdriver.
b) Remove the rubber diaphragm
and spring within; do not reuse.
c) Install the new stepper motor
with integrated diaphragm
assembly using longer hardware.
d) Plug new motor into existing wiring harness.
7. Adjust the burner shutter cap to the proper setting (see section
M
aIntenance
anD
s
erVIce
- B
urner
s
hutter
c
aP
a
DjustMent
on
page 13).
8. Reinstall burners, log grate, burner media, logs, and glass door
(see appropriate
M
aIntenance
anD
s
erVIce
sections
).
9.
Purge any air from gas line and reconnect to unit.
10. Use a small brush and apply a warm soapy water solution to all
gas connections. If a gas leak is present, bubbling will occur. Gas
leaks can be repaired by using a gas approved pipe thread sealant.
WARNING: NEVER USE AN OPEN FLAME WHEN TESTING
FOR GAS LEAKS.
11. Reconnect electrical power to the unit.
12. Light the pilot and recheck for leaks in the aluminum pilot line.
If a leak is evident, contact your Urbana dealer for a pilot line
replacement. WARNING: DO NOT ATTEMPT TO FIX THIS
LINE, IT MUST BE REPLACED IF DAMAGED. The pilot should
properly cover the thermocouple. If adjustment is necessary, turn
the adjustment screw in the valve (see Figure 71) clockwise to
decrease and counter-clockwise to increase until the correct flame
is achieved.
13. Start the main burner and verify full range of adjustment using
the UP/DOWN key. Confirm the inlet and manifold gas pressures
are within the acceptable range using a manometer (see I
nItIal
I
nstallatIon
- G
as
l
Ine
c
onnectIon
anD
t
estInG
).
If this unit
has been installed at an altitude higher than 2000ft (610m) it is
required to de-rate the unit accordingly.
In
the USA: The appliance may be installed at higher altitudes.
Figure 23: Pilot Shield Removal
Figure 24:
Pilot Orifice
Figure 25: Correct Pilot Position
