Inspection Procedures
Inspect on the first and third month after initial startup and then on an annual basis. If problems are found, refer to the Troubleshooting sections of this manual for additional directions.
1.Remove top of heater and inspect heat exchanger for soot and examine venting system.
2.Remove rear header and inspect for scale
deposits.
*3. Inspect pilot and main burner flame and firing rate.
*4. Inspect and operate all controls and gas valve.
*5. Visually inspect system for water leaks.
*6. a. Oil pump motor and bearing assembly, if oil cups are provided.
b. Disconnect pump from header and check con- dition of pump impeller. Check condition of bearing by attempting to move impeller from side to side. Replace any parts showing wear.
c. Check pump coupler for wear and vibration.
ADDENDA: LOW NOx HEATERS MODELS 0181 TO 0401
The Raytherm Low NOx Heater is offered with WH1-
Fig. 32: Pilot Burner Flame—IID (Atmospheric Models)
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 heater and void the warranty.
9.Keep heater area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
*Should be checked monthly. (Takes approximately 15 minutes).
DETAIL A
SEE DETAIL VIEW A
Fig. 33: Burner Detail
Operation
On call for heat, the ignition system, consisting of an electronic spark module, gas pilot system is energized. Providing pilot is proven, blower will start running, the main gas valve will open and the heater will operate. When the operating control is satisfied, the heater will shut down.
Start-Up Procedures (S8610b Ignition Module)
1.Turn on power to the heater with gas supply off.
2.Check ignition module as follows:
a.Set the tankstat to call for heat.
b.Watch for continuous spark at the pilot burner.
33