INSTALLATION AND OPERATION INSTRUCTIONS
3-2
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
3.2 PRIOR TO START-UP
3.2.1 Pre-Ignition Checks
1.
Ensure venting system is complete and seal tested. Confirm any common venting
system at the installation site is isolated and independent of the SL boiler. Also
confirm that any holes left from the removal of a previous boiler have been sealed,
and that any resizing of the old flue has been done. Fill condensation trap.
2.
Check that the water piping system is fully flushed and charged, and that all air has
been discharged through loosened bleed caps. Note it is possible to switch all pumps
on/off from the touchscreen – without a call for heat. This greatly simplifies system
filling and air bleeding (go to Installer Setup, System Settings, Site Settings, change
Manual Pump Purge to “ON”. When complete, return to Off, or this will automatically
occur with a call for heat). Use a minimum water pressure of 12 psig. And confirm that
the pressure relief valve is installed and safely drained.
3. Check to see that adequate gas pressure is present at the inlet gas supply test port.
Open the test port by turning its center-screw one full turn counterclockwise, using a
small (1/8” or 3 mm) flat screwdriver.. Connect a manometer and open the gas control
valve. Requirements are minimum 5” w.c and maximum 14” w.c. Check that there are
no gas leaks.
4.
Perform a final check of electrical wiring, and provide power to the boiler to initialize
operation.
3.2.2 Test Ignition Safety Shutoff
With the boiler in operation, test the ignition system safety shutoff device by shutting the
gas control valve immediately outside the boiler case. Ensure the boiler has shut off and
the appropriate Error information is displayed on the Touchscreen. To restart the boiler,
reset power or press “Clear Errors” in the Advanced Diagnostics section.
3.3 COMMISSIONING
The SL boilers are factory calibrated to operate with natural gas (or propane if so ordered)
at sea level. The Low Fire (Zero Offset) valve adjustment cap has been factory sealed
using paint-seal compound.
This cap must not be tampered with. The Low
Fire (Zero Offset) screw is not to be adjusted in the field.
The High Fire
(Gas:Air ratio) adjustment screw may have to be adjusted to attain optimum combustion
results if required, however, no mixture adjustment shall be performed unless done by
a qualified technician using properly functioning and calibrated combustion analyzing
equipment.
The controller will automatically detect the installation's altitude and make the appropriate
adjustments to operate the boiler up to 12,000 feet in elevation without de-ration. The
boiler will automatically de-rate at altitudes above 12,000 feet. Refer to the IBC Altitude
tables for further information.
WARNING
Fill trap with water before boiler is
first fired to prevent exhaust fumes
from entering room. Never operate
the boiler unless the trap is filled
with water. Failure to comply will
result in severe personal injury or
death.
Error displayed after testing ignition
safety shut off
