Honeywell Eclipse WX0050 Operating Instructions Manual page 7

step 3 - Ignite the burner
Low fire start
Tap E
C A
Low fire start
Legend:
A Adjusting screw on the ratio regulator
B Bypass pressure regulator
C Adjustable limiting orifice
D Burner gas inlet
WARnInG
– These procedures are 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 Drive control motor to low fire.
2 Be sure combustion air blower is running.
3 Open main gas manual shut off valves.
4 With pressure taps open, connect the manometer between Tap
e and the chamber.
5 Set system control to stay at low fire during and after ignition
sequence.
6 Attempt to ignite burner.
7 During trial for ignition, adjust bypass pressure regulator B and
adjustable limiting orifice C to achieve the appropriate Δp between
Tap e and the chamber as listed in the appropriate datasheet.
note: If viewing the flame, it should be blue with flashes of yellow.
The flame should be completely within the combustion tube. When
firing propane or butane, a proper low fire flame may have sustained
flashes of yellow.
8 If burner does not ignite:
a Shut off gas.
b When chamber temperature is below 250°F (121°C), shut off
combustion air blower.
c Restart combustion air blower, drive through purge cycle and
ignite the burner.
d Measure low fire gas pressure to the burner gas inlet D. Verify
pressure at D is within the range specified here: page 10
(Technical data).
9 After ignition, verify low fire flame:
a Shut off gas.
b When chamber temperature is below 250°F (121°C), shut off
combustion air blower.
c Restart combustion air blower and ignite burner.
d Measure low fire gas pressure to the burner gas inlet D. Verify
pressure at D is within the range specified on the datasheet for
your burner.
e Verify repeatability of ignition and low fire flame signal.
note: If the flame signal is too low, use the bypass regulator B and/
or the adjustable limiting orifice C to increase the pressure at Tap e
and provide better flame signal. However, this can have a negative
impact on emissions and/or nozzle life.
10 Close all pressure taps.
D
Main gas
shut-off
valve train
B
Pilot start option
Tap E
C B
Low fire start with pilot start option
WARnInG
– These procedures are 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 Drive control motor to low fire.
2 Be sure combustion air blower is running.
3 Open pilot gas manual shut off valve.
note:Be sure main gas manual shut off valves are closed.
4 With pressure taps open, connect a manometer between Tap e
and the chamber.
5 Set system control to stay at low fire during and after ignition
sequence.
6 Attempt to ignite burner.
7 During trial for ignition, adjust bypass pressure regulator B and
adjustable limiting orifice C to achieve the appropriate Δp between
Tap e and the chamber as listed in the appropriate datasheet.
note:If viewing the flame, it should be blue with flashes of yellow.
The flame should be completely within the combustion tube. When
firing propane or butane, a proper low fire flame may have sustained
flashes of yellow.
8 If burner does not ignite:
a Attempt to ignite the burner again to purge air from the gas pip-
ing.
b If burner still does not ignite, adjust bypass pressure regulator B
a half turn clockwise to increase gas flow.
c Repeat until burner ignites. If necessary, refer to page 10
(Assistance in the event of malfunction).
9 After ignition, verify bypass flame:
a Shut off gas. When chamber temperature is below 250°F (121°C),
shut off combustion air blower.
b Restart combustion air blower, drive through purge cycle, and
ignite burner.
c Measure low fire gas pressure to the burner gas inlet D. Verify
pressure at D is within the range specified on the datasheet for
your burner.
d Verify repeatability of ignition and low fire flame signal.
10 Close all pressure taps.
EN-7
D
Main gas
shut-off
valve train
A
Pilot gas
shut-off
valve train