CarAlarms.com P90-NG1 - Manual (Page 46)

Excalibur ® P90 Zero Clearance Direct Vent Gas Fireplace 46
12) Undo the pilot tube from the valve with a
7/16"
wrench.
13) Undo the quick drop out thermocouple nut
on the valve with a 9mm (metric) wrench.
14) Remove the Piezo igniter wire and push
button assembly.
15) Undo the "gas out" fl are nut with a 13/16"
wrench.
16) Undo the "gas out" fl are fi tting with an
11/16"
wrench.
17) Remove the 4 Phillips head screws from
the sides of the valve bracket and remove
valve.
Hint: If you are using black pipe, ensure
that there is a union by the valve,
otherwise removal will be almost
impossible.
INSTALLING VALVE
1) Attach the valve to the valve bracket with
the 4 (m5x8 metric) screws provided.
2) Reconnect the "gas out" fl are fi tting with an
11/16" wrench.
3) Reconnect the "gas out" fl are nut with a
13/16" wrench.
4) Install piezo ignitor push button assembly
and reconnect wire.
5) Reconnect the quick drop out thermocouple
nut with a 9mm wrench.
6) Reconnect the pilot tube nut with a 7/16"
wrench.
7) Scrape off the old gasket from the fl oor of the
fi rebox and from the valve tray assembly.
8) Install a new gasket and reinstall the valve
tray assembly.
Note: Failure to install a new gasket may
severely affect the appliance performance.
9) Reinstall the 10 hold down screws.
10) Hook up the 2 TP and 2 TH wires to the
appropriate connections on the valve.
11) Reinstall the bottom brick panel, then screw
the 2 screws & sleeves through the brick
panel to the fi rebox base (reversing step 8)
leaving them about 1/4" (6mm) above the
brick panel. Reinstall the rear log stand.
12) Install Burner/grate assembly
13) Hook up the gas line and check for gas
leaks with a soap and water solution or a
gas leak detector. (Do not use open fl ame
for leak testing.)
14) Fire up the unit temporarily
15) Check the manifold pressure.
16) Reinstall the logs and brick panels as
needed.
17) Reinstall the glass door and the facade.
18) Fire up the unit again and check for proper
fl ame appearance and glow on logs.
REMOVING VALVE
1) Shut the power off.
2) Open the bottom louver door. Loosen the 2
screws holding the Burner ON/OFF switch
and bracket to the bottom louver and lift the
assembly out.
3) Remove the facade if installed.
4) Remove the glass door (Refer to the "Glass
Door Installation" section).
5) Remove the logs.
6) Remove the burner/grate assembly by
removing the two Phillips head screws and
then slide the burner assembly to the left
and lift out.
Diagram 1: Remove the left and right screws
and then slide the burner/grate assembly to
the left and lift out.
7) Remove the rear log stand by removing the
2 screws.
Rear Log Stand screws
9) Disconnect the inlet gas line. See dia. 2.
10) Disconnect the 2 TP wires and the 2 TH
wires from the valve.
11) Remove the 12 Phillips head screws securing
the valve tray assembly in place and then
lift the entire assembly out.
screws Valve Tray Assembly
8) Remove the 2 screws & sleeves on the
bottom brick panel and lift out the bottom
brick panel. The brick panel is very fragile
- handle with care.
screws
MAINTENANCE