Step 5 Set Low Fire Gas; Step 6 Verify Gas Settings; Adjustment, Start & Stop (Cont.); System - Eclipse TA Series Installation Manual

Step 5: Set low fire gas
Step 6: Verify gas settings
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ystem
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Without a Ratio-Regulator
Step 1: Reset the system
10. Remove the manometer.
11. Close the pressure taps.
1. Drive the main gas control valve to low fire.
2. Adjust the control valve linkage to provide the desired low
fire gas flow.
Note:
It is very difficult to measure the very low gas pressures
experienced at low fire, and it may be necessary to rely on
visual inspection of the flame. This is especially true when
gas turndowns in excess of 10 to 1 are being used. The main
intent is to provide a stable flame with good flame signal that
will not cause the chamber temperature to overshoot.
Make sure that all settings are still the same after cycling the
system several times between high and low fire.
You must provide a constant pressure to the burner to insure
proper burner operation. If you are not using a burner
equipped with a ratio-regulator, you must provide a service
pressure regulator in order to maintain a constant inlet
pressure to the burner.
Main Gas
Valve Train
If you are adjusting a ThermAir burner equipped without a
ratio-regulator for the first time, you must follow these steps:
1. Reset the system
2. Verify air flow
3. Ignite the burner
4. Set high fire gas
5. Set low fire gas
6. Verify gas settings
1. Close these valves
-
the automatic gas valves
-
the manual gas cocks
2. Start the combustion air blower
Eclipse ThermAir T/A Series v1.10, Installation Guide No. 114, 4/7/06
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