Eclipse Winnox WX Series Installation Manual page 17

tep 2: et low fire air
To Chamber
Tap C
igure 4.2 Air Differential Pressure
1
2
igure 4.3 Air BV Adjustment
BV shaft shown
in closed position
igure 4.4 Air BV Shaft
Low fire air adjustment procedure:
1.
tart combustion air blower.
2.
Drive control motor to low fire position.
3.
Measure air differential pressure between tap (C ) and
combustion chamber.
ote:
The pressure tap is in the open position when the screw inside
the tap is unscrewed approximately 1/2 turn. Do not remove
screw. Be sure to tighten pressure tap screw clockwise to the
closed position after pressure measurements have been taken.
.
et low fire air.
. oosen the set screw
ote:
There is a slot in the end of the BV shaft that is parallel to
the air damper. This slot is used for visual indication of the BV
position. The BV is closed when the shaft slot is perpendicular
to the direction of air flow through the BV.
otate air BV shaft to fully closed position. (Holes
.
in BV damper will supply low fire air.)
ote
When firing into a positive chamber pressure, rotate the air
BV from closed position in the direction of actuator travel to
obtain a minimum 0.3” w.c. (0,8 mbar) air differential
pressure.
old BV shaft firmly in place and tighten set screw
.
ote:
High fire air adjustment is not required if burner is firing into
a neutral pressure chamber and a 90° travel control motor is
used.
It may be necessary to limit control motor stroke to less than
90° if firing into a large positive or negative chamber.
Contact your Eclipse Combustion representative for further
information.
erify high fire air
.
Drive control motor to high fire, full open.
a.
Compare the high fire air differential pressure
b.
between tap (C) and the combustion chamber to the
appropriate data sheet chart “Air
high fire air is insufficient, refer to Section 5,
Troubleshooting and Maintenance, in this document.
Return the control motor to the low fire position.
6.
Close the pressure taps.
7.
clipse Winnox WX Series v1, Installation Guide No. 111, 8/26/05
on burner side of coupling
P vs. Input.” If
∆
.
7