Table of Contents
Advertisement
Manifold pressure test port
DANGER
Making adjustments to
the IBC gas valve without
a properly calibrated gas
combustion analyzer and by
persons who are not trained
and experienced in its use
is forbidden. Failure to use
an analyzer can result in an
immediate hazard.
Zero-offset adjustment cap
Gas:Air ratio adjustment screw. This
screw offers very fine adjustment,
and may require several turns.
Flue gas test port plug
STARTUP AND COMMISSIONING
SL 28-160 MODULATING GAS BOILER
Turn OFF the gas supply to the boiler. With a small (1/8" or 3 mm) flat
1.
screwdriver, open the inlet gas supply pressure test port by turning its
center-screw 1 full turn counterclockwise. Attach a manometer to the
pressure test port and turn on gas to appliance. Static manometer reading
should be ideally 7" w.c., for Natural Gas and 11" w.c. for Propane. Minimum
and maximum static pressure should be between 5" and 14" w.c. Monitor
pressure throughout the commissioning procedure. Pressure may droop up
to 1" to 2" w.c. at high fire but under no circumstances should it drop below
4" w.c. at the gas valve inlet test port.
2.
Allow the boiler to ignite. Run against a large load, to maintain high fire.
With a combustion analyzer probe in the flue gas test port, turn the Gas:Air
3.
Ratio Adjustment screw (see Figure 35) to achieve results listed in Table 7
below. Check and adjust if necessary the high fire CO
checking and adjusting the low fire settings. High Fire = to increase the
CO
turn the adjustment screw Counter Clockwise (see Table 7 below for
2
corresponding CO
values - set for CO
2
Confirm the minimum fire level settings. Re-define the load as "Manual
4.
Control". Use Heat Output in "Configure Load x" to control the output as
needed. Reading should be within Low fire range. Re-test at high fire.
Turn boiler off by removing the call for heat (use the Installer Set Up
5.
screen to turn load to off if no other ready means available). Turn off gas
then remove the manometer connections, and turn the centre-screw in the
manifold pressure test port clockwise until fully closed. Ensure fully closed,
but not over-tightened. Restore gas and soap test for leaks.
MODEL
RANGE
SL 28-160 (Nat. Gas)
8.4 to 9.6% CO
SL 28-160 (Propane)
9.6 to 11.0% CO
Table 7: Combustion test target ranges - CO
Figure 35: Gas Valve
target at high fire).
2
HIGH FIRE
TARGET
RANGE
9.45% CO
8.0 to 8.7% CO
2
2
10.8% CO
9.2 to 10.4% CO
2
2
/ Maximum CO
2
levels first before
2
CO
LOW FIRE
MAX
PPM
TARGET
8.7% CO
< 150
2
2
9.8% CO
< 200
2
2
3-3
Advertisement
Table of Contents
Troubleshooting
