9
Rev. K 5-31-06
P/N 470880
MAINTENANCE INSTRUCTIONS
It is recommended that you check the following items at
least every six months and at the beginning of every
swimming season.
1. Examine the venting system. Make sure there
are no obstructions in the flow of combustion
and ventilation air.
2. Visually inspect the main burner and the pilot burner
flame. The normal color of the flame is blue. When
flame appears yellow, burners should be inspected
and cleaned; see Figure 5.
3. Check the heat exchanger surface for sooting.
For cleaning the burner, the following steps
must be performed by qualified servicemen.
1. Turn off the power to the heater.
2. Shut off the power to the heater.
3. Remove front door.
4. By loosening union disconnect gas train from burner
tray.
5. Remove two screws which secure the burner tray to
the base of heater and pull out the burner tray.
6. Remove screws and burner, hold down bracket and
slide burners out.
7. Clean and remove the soot from burners and orifice
by wire brush or
vacuum cleaner.
8. Remove the pilot
orifice and clean it;
see Figure 6.
Do not use any
sharp object! It will
destroy the designed
orifice size!
9. Reverse above
procedure to reinstall
burner tray.
Maintenance (Standard Heater)
COMMON CAUSES OF SOOTING
1. Low gas pressure.
2. Excessive water flow can cause condensation
which will contribute to sooting.
3. Foreign material in burners and orifices; dirt,
spider webs, etc.
4. Inadequate air supply or inadequate venting.
5. Heater cycling rapidly; fires, shuts down and
refires quickly 30-45 seconds.
To remove a light soot formation without
removing the heater exchanger:
1. Remove burner tray; see
Figure 7.
2. Remove top,
flue collector
and baffles.
3. Using a brush
with plastic or
fiber bristles,
brush the bottom
of the tubes and
then the top of
the tubes.
4. Spray off residue with water. (Repeat steps 3-4
as needed).
5. Brush off burners.
6. Replace burner tray and baffles, then test fire.
7. If flames burn clean, replace baffles, flue
collector, and top.
CAUTION
DO NOT USE WIRE BRUSH!
Figure 6.
Pilot
Figure 7.
Burner Tray
Figure 5.
Blue Flame
