IBC SL 30-175 Installation And Operating Instructions Manual page 39

MODEL
SL 30-175 (Natural Gas) CO
SL 30-175 (Propane) CO
2
Table 7: Combustion test target ranges - CO
STARTUP AND COMMISSIONING
SL 30-175 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.
3. With a combustion analyzer probe in the flue gas test port, turn the Gas:Air
Ratio Adjustment screw to achieve results listed in Table 7 below. Check and
adjust if necessary the high fire CO
the low fire settings. High Fire = to increase the CO
screw Counter Clockwise (see Table 7 below for corresponding CO
set for CO
2
4. Confirm the minimum fire level settings. Re-define the load as "Manual
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.
5. Turn boiler off by removing the call for heat (use the Installer Set Up
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.
HIGH FIRE
RANGE
9.1 – 9.7
2
10.5 – 11.1
/ Maximum CO
2
Figure 31: SL 30-175 Gas Valve Adjust
levels first before checking and adjusting
2
target at high fire).
LOW FIRE
TARGET RANGE
9.5 8.4 – 9.0
10.8 9.4 – 10.2
turn the adjustment
2
values -
2
CO MAX PPM
TARGET
8.7 120
9.8 150
3-3