Replace any parts showing wear.
c. Check pump coupler for wear and vibration.
7.Check flow switch paddle.
8.Clean room air intake openings to ensure ade- quate flow of combustion and ventilation air.
CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the boiler and void the warranty.
9.Keep boiler area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
*Should be checked monthly. (Takes approximately 15 minutes).
LOW NOx BOILERS—
Models 181 to 401
The boilers are certified and tested under the latest edition of the ANSI Z21.13 standards for hot water boilers.
The boiler should be installed to meet the latest edition of all local codes, the National Fuel Gas Code Z223.1 and the National Electrical Code, ANSI/NFPA 70.
DETAIL A
SEE DETAIL VIEW A
Fig. 44: Burner Detail
Operation
On call for heat, the ignition system, consisting of an electronic spark module, and gas pilot system is ener- gized. Providing pilot is proven, blower will start running, the main gas valve will open and the boiler will operate. When the operating control is satisfied the boiler will shut down.
Start-Up (S8600H)
1.Turn on power to the boiler with gas supply off.
2.Check ignition module as follows:
a.Set the thermostat or controller to call for heat.
b.Watch for continuous spark at the pilot burner.
c.Check the ignition spark operation. Time must be within the lockout timing period (90 sec- onds).
d.Turn control down to end call for heat and wait 60 seconds before beginning step 3.
3.Turn on gas supply.
4.Set controller to call for heat.
5.System should start as follows:
a.Spark will turn on and pilot gas valve will open.
b.Main valve and blower will be powered after pilot flame signal is proven.
c.Heater will operate until call for heat is satis- fied.
Blower Adjustment
The blower is set for optimal operation. If adjustment is needed, see Fig. 46.
Visual Inspection
Flame can be observed through the slot opening above the plenum. Flame color is blue and evenly spread on the top surface of the burner. At least every three months a visual inspection should be made of the burners. In case flame lifting is observed, check gas pressure on manifold and static pressure in plenum. Gas pressure in manifold should be 3.9" W.C. and static pressure in plenum should be greater than 0.5" W.C.
Electrical
Be sure that electrical service to the boiler has proper overload fuse or circuit breaker protection and wire
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