3-3
STARTUP AND COMMISSIONING
SL 30-175, SL 45-260 MODULATING GAS BOILERS
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
(see Figure 32, “B”)
to achieve 25% excess air (see
table 8 below for corresponding Co
2
values - set for Co
2
target at high fire).
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 Heat Load Configuration
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
HIGH FIRE
LOW FIRE
CO MAx
PPM
CO
2
RANGE CO
2
TARGET CO
2
RANGE CO
2
TARGET
sl 30-175 (natural gas)
8.4 to 9.6%
9.4%
8.0 to 9.4%
8.8%
< 100
sl 30-175 (Propane)
9.6 to 11.0%
10.7%
9.2 to 10.7%
10.1%
< 150
sl 45-260 (natural gas)
8.4 to 9.6%
9.4%
8.0 to 9.4%
8.8%
< 100
sl 45-260 (Propane)
9.6 to 11.0%
10.7%
9.2 to 10.7%
10.1%
< 150
Table 8: Combustion test target ranges - CO
2
/ Maximum CO
Zero-offset adjustment screw -
WARNING! DO NOT ADJUST!
Gas:Air ratio adjustment screw. This
screw offers very fine adjustment,
and may require several turns.
Insertion of flue gas analyzer probe
Removal of flue gas test port plug
Flue gas test port plug
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.
Figure 32: Gas Valve and Pressure Reference System
Содержание SL 30-175
Страница 76: ...NOTES...
