Eclipse ThermJet TJSR0020 Installation Manual page 13

Figure 4.2. Butterfly Valve Location
Single Burner
a.Make sure that pressure taps A and C on the burner
are open.
b.Connect a manometer to taps A and C.
c.Confirm that the eductor butterfly valve is set to the
correct position for the appropriate furnace
temperature and furnace pressure requirements.
d.Adjust the manual butterfly valve to achieve the
differential air target value at taps A and C.
e.Remove the manometer.
f.Close the pressure taps.
Multiple Burner System
a.Make sure taps A and C of the first burner is open.
b.Connect a manometer to taps A and C of the first
burner.
c.Confirm that the eductor butterfly valve is set to the
correct position for the appropriate furnace
temperature and furnace pressure requirements.
d.Adjust the manual butterfly valve to achieve the
required differential air target value at taps A and C.
e.For all the remaining burners in the zone measure
and note the differential air pressure at taps A and
C.
f.If all the measured differential pressures are within
0.5" w.c. (1.25 mbar) of each other, then proceed to
the next section. If the variation is greater than 0.5"
w.c. (1.25 mbar) it will be necessary to adjust the
manual air butterfly valve at each burner to improve
the balance.
g.Make sure that all the pressure taps are closed.
h.Repeat step 3 for other zones (if any).
Step 4: Set Low Fire Air (if applicable)
1. Set the system to low fire.
2. Connect the manometer to Taps A and C (air orifice
pressure differential).
3. Adjust the minimum setting at the automatic zone air
control valve until the low fire air differential pressure
between taps A and C matches the Minimum Low Fire
Air Pressure Drop in the datasheet. This is the initial
setting only. Further adjustment may be required.
4. Repeat steps 2 and 3 for the other zones (if any).
Eclipse ThermJet Self-Recuperative, V5, Installation Guide 208, 2/4/2013
Manual Butterfly
Valve
Step 5: Verify the Air Settings
Make sure all the settings are still the same after you cycle
the system several times between high and low fire.
Step 6: Ignite the Burners
■ This procedure is written with the assumption the
burner has a flame monitoring control system
installed and operating. A proper purge cycle must
be part of the system and purge timing should not
be bypassed.
1. Set the system to low fire.
2. Make sure the combustion air blower is running.
3. Set the manual gas valve at each burner to 50% open.
See Figure 4.3. If using an adjustable limiting orifice
valve, set it at 5 full 360° rotations up from the bottom.
Outer Dial
Set Screw
Figure 4.3.Manual Gas Butterfly 50% Open
Figure 4.4.Adjusting Set Screw
4. Turn the adjusting screw on the Dungs FRG ratio
regulator counterclockwise until the screw cannot turn
any longer. From this position, turn the adjusting
screw 15 turns clockwise for the initial burner setting.
NOTE: Never turn the adjusting screw more than 15 turns
clockwise from the top. This may result in a gas rich
condition.
NOTE: If you are not using a Dungs FRG Ratio Regulator,
the settings in this document do not apply.
WARNING
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