Raypak Hi Delta 302A-902A Installation And Operating Instructions Manual

4910. To restart system, follow lighting instructions in theOperation section.11. Check to see that the high limit control is setabove the design temperature requirements of thesystem.For multiple zones: Check to make sure the flow isadjusted as required in each zone.12. Check that the heater is cycled with the thermo-stat. Raise to the highest setting and verify that theheater goes through the normal start-up cycle. Re-duce to the lowest setting and verify that theheater goes off.13. Observe several operating cycles for proper oper-ation.14. Set the room thermostat or tankstat to desiredtemperature.15. Review all instructions shipped with this heaterwith owner or maintenance person, return to enve-lope and give to owner or place the instructions in-side front panel on heater.OPERATIONLighting Instructions1. Before lighting, make sure you have read all of thesafety information in this manual.2. Set the thermostat to the lowest setting.3. Turn off all electrical power to the appliance.4. This appliance is equipped with an ignition devicewhich automatically lights the burner. Do not try tolight the burner by hand.5. Remove upper front panel.6. Turn on main manual gas valve.7. Wait 5 minutes to clear out any gas. Then smell forgas, especially near the floor. If you then smellgas, STOP! Follow the steps in the safety informa-tion on the front cover of this manual. If you do notsmell gas, go to next step.8. Turn on all electrical power to the appliance.9. Set thermostat to desired setting. The appliancewill operate. The igniter will glow after the pre-purge time delay (15 seconds). After igniter reach-es temperature (45 seconds) the main valve willopen. System will try for ignition three times. Ifflame is not sensed, lockout will commence.10. If the appliance will not operate, follow the instruc-tions “To Turn Off Gas To Appliance,” and call yourservice technician or gas supplier.11. Replace access panel.12. If heater fails to start, verify the following:a. There are no loose connections or that theservice switch is off.b. High temperature limit switch is set above wa-ter temperature.c. Thermostat is set above room temperature.d. Gas is on at the meter and the heater.e. Incoming gas pressure to the gas valve isNOT less than 5.0 in. WC for natural gas, 11.0in. WC for propane gas.To Turn Off Gas To Appliance1. Set the thermostat to lowest setting.2. Turn off all electrical power to the appliance if serv-ice is to be performed.3. Remove upper front panels.4. Turn off main manual gas valve.5. Replace access panel.