47
Section 9 - Routine Maintenance
Fig. 65
Transfer
Auger
Brass Guide
Top View of Maxim Hopper
2. Connect the wires to the transfer auger motor.
Finish Installation
1. Install the inspection window and secure with the
screws.
2. Attach the 1/2" silicone tubing to the thermal valve
and secure with hose clamp.
3. Install the access panels.
4. Connect the electrical power at the main power
source.
5. If a one-pound propane cylinder was installed, thread
it onto the regulator on the gas valve. Otherwise turn
on the gas supply at the appliance service valve.
6. Before adding fuel to the hopper, start the furnace
and verify that both augers are turning freely without
binding. The transfer auger can be viewed from the
hopper and the burner auger can be viewed using a
flashlight from inside the firebox.
7. Once it has been determined the augers are turning
freely, add fuel to the hopper and start the furnace
following the procedure in Initial Start-up.
9.10 Test Thermal Valve
Twice each heating season (at the beginning and the
end), check to make sure the thermal valve operates
properly.
WARNING
Allow the outdoor furnace to thoroughly cool
down before performing maintenance.
1. Disconnect the electrical power at the main power
source.
2. Remove the access panels from the back corner of
the furnace and set aside.
3. Remove the 1/2" silicone tubing from the thermal
valve; then place a small cup under the outlet on the
valve.
4. Push down on the red cap of the thermal valve and
run a small amount of water through the valve to
make sure it is operating properly.
5. Connect the silicone tubing to the thermal valve
making sure not to kink the silicone tubing.
6. Install the access panels.
7. Connect the electrical power to the main power
source.
9.11 Gas Ignitor - M255 P Models
NOTE: Any maintenance on the gas ignitor should
be done by a qualified installer in accordance
with applicable codes.
Gas Pressure
Pressures should be checked while burner is operating.
Gas pressure can be tested using the gas pressure taps
on the gas valve. Ensure that the inlet side (supply)
gas pressure is no less than 10 inches of water column.
Outlet side (manifold) gas pressure must be no less than
9 inches of water column.
If the supply gas pressure is correct and the manifold
gas pressure is not, the manifold gas pressure can be
adjusted by removing the cap on the gas valve and
turning the adjustment screw with a flat screwdriver (Fig.
66). Turning the adjustment screw clockwise increases
manifold gas pressure; turning it counterclockwise
decreases manifold gas pressure.
Fig. 66
Electrode
1. Disconnect the gas line and spark plug wire; then
remove the two 5/16" screws securing the burner
tube assembly and remove the burner tube assembly.
2. The electrode must be adjusted properly to provide
the proper spark and sense the flame when lit. The
electrode rod must be centered in the end of the
burner tube (Fig. 67).
