3-5
STARTUP AND COMMISSIONING
SL 26-260 G3, SL 40-399 G3 MODULATING GAS BOILERS
3.4 FUEL CONVERSION
The SL boilers are factory fire-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 qualified technician.
Refer to the previous 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 field.
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 qualified technician using properly
functioning and calibrated combustion analyzing equipment.
Fuel conversions must be carried out by a qualified 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. Read the fuel conversion instructions supplied with the fuel conversion kit.
3. Carefully follow the procedures of the fuel conversion instructions on:
•
Fuel Conversion
•
Combustion Testing and Adjustment
•
Placing conversion labels associated with the new fuel onto the boiler.
4. Carefully follow the
“Prior to Start-Up” – Section 3.2 and “Commissioning” – Section
3.3 procedures on the preceding pages 3-2 and 3-3.
Fuel Conversion Kit Part Numbers
MODEL NUMBER NATURAL GAS
TO PROPANE
PROPANE TO
NATURAL GAS
SL 26-260 G3
P-300
P-301
SL 40-399 G3
P-302
P-303
WARNING
Check the rating plate of the
boiler to ensure it is configured
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 fire or
explosion, which may cause
property damage, personal
injury, or loss of life.
Table 8: Fuel Conversion Kits
