Honeywell Eclipse WX0050 Operating Instructions Manual page 8

step 4 - set low fire gas
WARnInG
– 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 manual gas butterfly valve to 75% open. See figure "Manual
butterfly valve adjustment".
CCW for
more gas
Ratio regulator adjustment
note: To adjust manual butterfly valve:
a Loosen set screw.
b Turn dial.
c Tighten set screw.
Full
open
Set
Outer
screw
dial
Manual butterfly valve adjustment
2 Open all manual gas shut off valves.
3 Set system control to stay at low fire during and after ignition
sequence.
4 With taps open, connect manometer between Tap C and the
combustion chamber.
5 Ignite the burner.
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.
6 Verify low fire flame.
a Drive control motor from low fire and back. Verify low fire and
stable flame signal are repeated.
b Turn the burner off and repeat the ignition sequence. Verify low
fire and stable flame signal are repeated.
7 Close all pressure taps.
Adjusting
screw
step 5 - set high fire gas
To chamber
High fire gas adjustment
1 Set manual gas butterfly valve to 75% open. See step 4, figure
"Manual butterfly valve adjustment".
note: To adjust manual butterfly valve:
a Loosen set screw.
b Turn dial.
c Tighten set screw.
2 With burner lit, drive control motor to high fire position.
3 Measure air loading line pressure from tap C to the chamber. See
step 2, figure "Air differential pressure".
4 Refer here: page 13 (Air ΔP vs. Input). Find your measured
high fire air Δp "w.c. (mbar) on vertical axis at left and plot the
intersection point it makes with performance curve in center of
chart. Follow chart straight down from this intersection point to
confirm the desired high fire burner input Btu/h (kW) charted on
horizontal axis across the bottom.
5 Calculate the required gas flow scf/h (m
fire burner input Btu/h (kW).
➔ Example: (500,000 Btu/h input) x (1 scf Natural Gas/1000 Btu) =
500 scf/h of Natural Gas.
6 Measure existing gas Δp "w.c. (mbar) across customer supplied
in-line fuel orifice meter, and using the manufacturer's conversion
flow chart for the fuel orifice meter, calculate* the existing gas flow
scf/h (m 3 /h) through orifice.
(* = making the manufacturer's prescribed corrections for Fuel
Type, Temperature, and Elevation.)
7 If the required gas flow scf/h (m
spond with the existing gas flow scf/h (m
existing gas flow using manual butterfly valve (refer to step 1 for
adjustment procedure) to match required gas flow for the desired
high fire burner input.
8 If required gas flow cannot be achieved, refer to page 10
(Assistance in the event of malfunction).
EN-8
Tap C
Manometer
3 /h) for the desired high
3 /h) from step 5 does not corre-
3 /h) from step 6, adjust