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RELEASED
Burner Tray Removal
1. Shut off main electrical power switch to heater.
2. Shut off gas upstream of heater.
3. Remove front door.
4. Disconnect gas line from gas valve.
5. Remove (2) screws that mount burner tray to unit,
and (2) screws that secure gas valve to jacket.
6. Disconnect wires that terminate at gas valve.
7. Disconnect hi-tension wire from PC board.
8. Carefully slide out burner tray assembly.
9. Reverse above procedure to reinstall.
BURNER
PILOT
BURNER
HOLD-DOWN
BRACKET
Figure 46. Burner Tray Assembly
Gas Valve Removal
1. Shut off gas supply to the heater. Remove gas piping
to gas valve inlet.
2. Disconnect wires, pilot tubing and bleed line, if
required.
3. Remove burner tray from heater.
4. Turn vertical gas pipe from manifold slightly and
unscrew gas valve.
5. Reverse above procedure to reinstall.
Main Burner And Orifice Removal
1. Remove burner tray, following above procedure.
2. Remove screws and burner hold-down bracket.
NOTE: If the heat exchanger is sooted badly, the burner
hold-down bracket and spacer can become distorted
from
direct-flame
impingement
necessitates replacement of these parts.
3. Lift burners from slotted spacers and slide from
orifices. Clean with a wire brush.
30
GAS VALVE
GAS
ORIFICE
and
this
usually
4. Orifices usually do not need to be replaced. To clean,
run either copper wire or wood toothpick through
orifice. Do not enlarge hole. To remove orifice, use a
socket wrench and remove from manifold. DO NOT
overtighten when reinstalling.
Pilot Removal And Cleaning
1. Disconnect pilot tubing and wires from gas valve.
2. Remove pilot assembly from burner tray.
3. Remove pilot from bracket.
4. Remove pilot orifice and air opening, and clean with
wire or small brush.
CAUTION! Do not enlarge hole in pilot orifice.
A
5. Reverse above procedure to reinstall.
Figure 47. Pilot
Heat Exchanger Removal
1. Shut water, gas and electricity off, close valves and
relieve pressure, then remove relief valve. Remove
side access panels.
2. Remove top jacket holding screws.
3. Remove rear top panel.
4. Remove screws mounting the rain shield to the rear
panel. Also remove the screws that mount the rain
shield to the sway brace. Remove rain shield.
5. Remove the four (4) screws holding down the flue
collector. Remove the flue collector.
6. Disconnect flange nuts on Inlet/Outlet header, remove
ProTek Shield Assy bonding wire (if equipped) from
heat exchanger stud, loosen union at gas pipe and
slide heater away from piping.
7. Lift heat exchanger straight up using caution not to
damage refractory.
8. Reverse above procedure to reinstall. Make sure the
insulation strips are properly replaced on top of the
refractory retainer.
For Reference Only
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