Lighting | Tempest® 4442 Burner
INITIAL LIGHTING PROCEDURE
1. Close all manual gas valves (Items A , F , H , J and N ) and the UV cooling air valves (Item S ). Make sure the needle valve under the cap of item N is closed.
Note: The burner must light when the gas is turned on before the ignition.
d) Purge the combustion chamber after each attempt at ignition.
2. Open the main air valve ( P ) and all balancing valves ( Q ).
3.Open the furnace doors. Start the combustion air blower.
9.Repeat steps 7 and 8 for all burners.
4. Adjust the motor/valve linkage in Block 1 and/or Block 2 as required.
10. When all burners are lit, switch the 3-way solenoid air valve ( V ) to send the air impulse to the ratio regulator ( G ).
5. Energize the controls and run the system through the purge cycle.
11. Open the manual reset gas shutoff valve ( C ). The vent valve ( D ) should close, and the blocking valve ( E ) should open.
6.With the main air control valve ( P ) at high fire, and the 3-way solenoid ( V ) in the vent position [no signal to the ratio regulator ( G )]: a) Open the main gas valve ( A ). b) Open the bypass gas valve ( J ). c) Open the bypass solenoid gas valve ( L ). d) Open only one bypass gas valve ( N ), including the internal needle valve. e) Adjust the bypass gas regulator ( K ) for 16 osi outlet pressure. f) Close the bypass gas solenoid ( L ). g) Close the bypass gas valve ( N ), including the internal needle valve.
12. a) Open one burner gas shutoff valve ( F ). b) Slowly open the limiting orifice gas valve ( H ) until the burner lights and the required gas flow is achieved.
13. Repeat step 12 for the remainder of the burners.
14. Drive the main air valve ( P ) to low fire and adjust the ratio regulator ( G ) for a stable low fire.
15. Re-check burner ignition at high fire with no impulse air to the ratio regulator.
16. Turn on the UV cooling air and adjust the needle valves ( S ) for adequate air flow.
7. a) Energize the igniter.
b) Open the bypass solenoid gas valve ( L ). c) Open only one bypass gas valve ( N ), leaving the internal needle valve closed. d) Slowly open the internal needle valve in ( N ) until the burner lights. e) De-energize the igniter and bypass gas solenoid ( L ).
17. Close the furnace doors.
8.a) Energize the bypass solenoid ( L ). b) Energize the igniter.
c) If the burner does not light, increase the opening of the internal needle valve in valve ( N ) and repeat the sequence.
Bulletin 4442 Page 12
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