Install Instructions

21
SERVICE INFORMATION
The installer may be able to observe and correct certain problems
which may arise when the unit is put into operation. HOWEVER,
it is recommended that only qualied service personnel, using
appropriate test equipment, be allowed to service the heater.
Any safety devices used in conjunction with this water heater
should receive periodic (at least twice a year) inspection to
assure proper operation. All relief valves should be inspected
and manually operated every six months.
PILOT AND MAIN BURNER MAINTENANCE
At least twice a year, check the pilot burner, g. 14 and the main
burners, g 12, for proper operation.
The burners should display the following characteristics:
• Provide complete combustion of gas.
• Cause rapid ignition and carryover of ame across entire
burner.
• Give reasonably quiet operation during ignition, burning and
extinction.
• Cause no excessive lifting of ame from burner ports.
If the preceding burner characteristics are not evident, check for
accumulation of lint or other foreign material that restricts or blocks
the air openings to the burners or heater.
Also check for good ow of combustion and ventilating air to the
unit. Maintain a clear area around the heater at all times.
Qualied servicers should follow this procedure when the heater’s
burners need cleaning.
1. Turn off the electrical power and close the main manual gas
shutoff valve.
• Allow heater parts to cool before disassembly.
2. Remove main burner manifold assembly from heater.
• Refer to parts list supplied with this manual for disassembly
aid.
3. Remove any loose foreign material such as dust or lint with
a vacuum. Check all ports, orices and air openings for
blockage. Dislodge any foreign material causing blockage.
Do not use sharp metal objects to clean blocked orices as
they will damage the soft brass orice. Remove any soot or
carbon deposits with a rag making sure to remove any lint left
on burner by vacuuming again.
MAIN BURNER FOR HW HEATERS
FIGURE 12
4. Reinstall the burner manifold assembly on heater.
5. Restore electrical power and gas supply to heater.
• Check for gas leaks and proper heater and vent operation.
I.I.D. PILOT BURNER
Servicing of the pilot burner includes cleaning the burner head
and the orice of the pilot burner, g. 14.
The pilot ame should envelop 3/8 to 1/2 in. of the tip of the
insulated rod on the igniter-sensor. If adjustment is required, it is
necessary to establish pilot ame without main burner operation.
For this to happen, perform the following steps.
1. Follow “TO TURN OFF GAS TO APPLIANCE” steps in the
“OPERATING INSTRUCTIONS FOR I.I.D. MODELS”.
2. Carefully disconnect the wire terminal connected to the
MV terminal of the S8600/S8610 module, g. 3.
3. Turn gas valve control knob counterclockwise to “ON”.
4. Turn on all electric power to the heater.
5. Set tank temperature control to call for heat. Pilot will operate
without the main burners igniting.
6. Remove the pilot adjustment cover screw, g. 13, and turn
the inner adjustment screw clockwise
to decrease or
counterclockwise to increase the pilot ame. Be sure to
replace cover screw after adjustment to prevent possible gas
leakage.
7. Repeat step 1.
8. Carefully reconnect the MV wire terminal to the S8600/S8610
module. Be sure the terminal is securely connected.
9. Follow “OPERATING INSTRUCTIONS FOR I.I.D. MODELS”
to put heater back into operation.
If the pilot burner ignites but the main burner fails to light, check
for gas ow to the main burner.
Check for good terminal connections at the igniter-sensor
connector (g. 14) and at the S8600/S8610 module.
For further assistance see Chart 2, “S8600/S8610 INTERMITTENT
PILOT SYSTEM TROUBLESHOOTING”.
HONEYWELL GAS VALVE FOR I.I.D. SYSTEM (TOP VIEW)
FIGURE 13