IBC SL 35-199 Operating Instructions Manual page 39

MODEL
SL 35-199 (Natural Gas) CO
SL 35-199 (Propane) CO
2
SL 45-260 (Natural Gas) CO
SL 45-260 (Propane) CO
2
Table 7: Combustion test target ranges - CO
STARTUP AND COMMISSIONING
SL 35-199, SL 45-260 MODULATING GAS BOILERS
de-ration. The boiler will automatically de-rate at altitudes above 4,500 feet.
Refer to the IBC Altitude tables for further information.
To verify proper operation of the gas valve in the field, the following procedure
can be carried out by a qualified technician.
1. Turn OFF the gas supply to the boiler. With a small (1/8" or 3 mm) flat
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 31a for the SL 35-199 Gas Valve and
Figure 31b for the SL 45-260 Gas Valve) 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
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.
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.
HIGH FIRE
RANGE
9.1 -9.7
2
10.5 – 11.1
9.1 – 9.7
2
10.5 – 11.1
/ Maximum CO
2
values - set for CO
2
LOW FIRE
TARGET RANGE
9.5 8.4 – 9.0
10.8 9.4 – 10.2
9.5 8.4 – 9.0
10.8 9.4 – 10.2
levels first before
2
target at high fire).
2
CO MAX PPM
TARGET
8.7
9.8
8.7
9.8
150
180
120
150
3-3