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Fig. 72
SECONDARY AIR CHARGE TUBE AND
REFRACTORY MODULES
WARNING
Remove all wood, coals and ash from the firebox
and allow the firebox to cool thoroughly before
replacing the secondary air charge tube and/or
refractory.
Fig. 73
1. Remove the secondary air charge tube by lifting
it up and sliding it toward the front of the outdoor
furnace.
2. Remove the rope gasket; then remove the existing
refractory modules.
3. Install the new refractory modules making sure
the bottom lip rests securely on the firebrick in the
Reaction Chamber; then install a new rope gasket on
top of the refractory modules.
4. Install the new secondary air charge tube by placing
it in the opening at the back of the outdoor furnace
as shown; then push it toward the back of the
outdoor furnace to secure it in place making sure
the alignment pin fits into the alignment hole in the
refractory modules.
Section 4 - Owner Serviceable Items
THERMOCOUPLE
1. Disconnect power to the outdoor furnace.
WARNING
Do not proceed without testing that power is
disconnected. Make sure the power cannot be
reconnected while replacing the thermocouple
2. Open the airbox cover located at the rear of the
outdoor furnace.
NOTE: Smoke or creosote in the airbox is an
indication that the bypass door was closed
before waiting 15 seconds and/or the exhaust
flow through the bottom of the firebox is plugged.
After closing the firebox door, always wait for 15
seconds; then slowly pull the bypass door handle
toward the front of the outdoor furnace and push
down to close the bypass door.
3. Disconnect the thermocouple connector; then
remove the mastic tape from the thermocouple.
4. Remove the thermocouple.
5. Install the new thermocouple until 13 mm (1/2") of
the temperature sensor extends into the Reaction
Chamber.
Fig. 74
6. Secure the thermocouple with the mastic tape; then
connect the thermocouple connector.
7. Close the airbox cover; then connect power to the
furnace.
Mastic Tape
55
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