IBC SL 35-199

3-5
STARTUP AND COMMISSIONING
SL 35-199, SL 45-260 MODULATING GAS BOILERS
FUEL CONVERSION
TheSL35-199andSL45-260modulatingboilersarefactoryre-testedto
operate with natural gas, or propane as ordered. The rating plate will be marked
to indicate which fuel the particular boiler has been set up with. Firing a boiler
with a fuel other than what is listed on the rating plate is prohibited unless the
followingconversionprocedureiscompletedbyaqualiedtechnician.
Refer to the preceeding section 3.3 - COMMISSIONING. The Low Fire (Zero
offset) valve adjustment cap on the gas valve 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 eld.
The High Fire (Gas:Air ratio) adjustment screw will have to be adjusted to attain
optimum combustion results whenever fuel conversion is undertaken, however,
no mixture adjustment shall be performed unless done by a qualied
technician using properly functioning and calibrated combustion analyzing
equipment.
Thefollowingprocedurecanbecarriedoutbyaqualiedtechnician:
1. Ensure you are installing the correct fuel conversion kit for your boiler.
Compare the boiler model number with the Kit# found in table 8.
2. Ensure the fuel conversion instructions supplied with the fuel conversion kit
are read, understood and followed carefully.
3. The gas supply shall be shut off prior to disconnecting the electrical power,
and before proceeding with the conversion. Ensure that the gas supply is
turned off at the gas shut off valve.
4. Using a #25 Torx wrench, undo the 3 venturi mounting screws.
5. Liftthegasvalveupandawayfromtheventuri.InsertorRemovetheOrice
as directed in the appropriate Fuel Conversion Kit..
6. Re-install the 3 venturi mounting screws and tighten.
7. Restore gas supply by opening the gas control valve, and using an approved
leak detection solution, soap test all joints.
8. Carefully follow the procedures on page 3, Combustion Testing and
Adjustment
9. Place the conversion labels associated with the new fuel onto the boiler at
the positions indicated on page 4 of the relevant Fuel Conversion instruction
document.
MODEL
NUMBER
NATURAL GAS TO
PROPANE
PROPANE TO NATURAL
GAS
SL 35-199 P-224 P-223
SL 45-260 P-170 P-223
Table 8: Fuel Conversion Kits
3.4
WARNING
Check the rating plate of
the boiler to ensure it is
congured for the fuel you
are using. If the fuel is
incorrect for the appliance,
a conversion kit must be
ordered from IBC and the gas
valve adjusted accordingly.
Failure to perform the
required fuel conversion can
result in an immediate hazard.
DANGER
Operating any IBC boiler
using a fuel other than the
fuel listed on its rating plate is
prohibited. If the information
in this section related to
conversion to alternate
fuels is not followed exactly,
a dangerous situation can
result, leading to re or
explosion, which may cause
property damage, personal
injury, or loss of life.