Eclipse RatioAir v1 - Installation Guide No. 115, 4/7/06
0
Ratio Regulator
Step3:
Ignite the burner
Procedure A:
Low fire start
without
high
turndown option.
Bias
Adjusting
Screw
CW for
more gas
Main gas
shut-off
valve train
Low fire start without high turndown option:
1.
Drive control motor to low fire.
2.
Be sure combustion air blower is running.
3.
Verify bias adjusting screw
1
on ratio-regulator spring
column is six full clockwise turns (360° x 6) down from the
top (initial setting).
Use five turns for Model RA0025 only.
4.
Open main gas manual shut off valves.
5.
Set system control to stay at low fire during and after
ignition sequence.
6.
Attempt to ignite burner.
7.
If burner does not ignite:
a.
Attempt to ignite burner again to purge air from the
gas piping.
b.
If burner still does not ignite, turn bias adjusting screw
1
a half turn clockwise to increase gas flow.
c.
Attempt to ignite burner.
d.
Repeat steps
b
and
c
until burner ignites. If necessary,
refer to Chapter 5 for troubleshooting tips.
8.
Flame signal strength:
Adjust gas flow with bias adjusting screw
1
for lowest gas
flow that maintains a stable flame signal:
• clockwise, for more fuel
• counterclockwise, for less fuel.
9.
Verify low fire flame:
a.
Shut off gas. When chamber temperature is below 250°F
(121°C), shut off combustion air blower.
b.
Restart combustion air blower and ignite burner.
c.
Verify repeatability of ignition and low fire flame signal.
