Slant/Fin CHS-399 - Manual (Page 4)

Slant Fin Corp. │ Installation and Operation Instructions CHS Series
4
Failure to use the appropriate Natural to LP Conversion Kit and Orifice when operating
the CHS with Propane will result in extremely dangerous burner operation leading to
property damage, serious injury or death. Refer to section titled ATTENTION: LIQUEFIED PETROLEUM
(LP) PROPANE for applicable conversion kit and LP orifice numbers.
ATTENTION: LIQUEFIED PETROLEUM (LP) PROPANE
The CHS boiler is factory set to operate with Natural Gas. BEFORE OPERATING WITH PROPANE, the
specified LP Conversion Kit and Orifice must be installed to convert the boiler so it will operate safely with
LP Propane. The correct kit and LP orifice is listed below (Each kit comes with conversion instructions).
Liquefied Petroleum (LP) propane gas is heavier than air; therefore, it is imperative that your CHS boiler is not
installed in a pit or similar location that will permit heavier than air gas to collect. Local Codes may require
boilers fueled with LP gas be provided with an approved means of removing unburned gases from the room.
Check your local codes for this requirement.
Natural to LP Propane Conversion Kit _
Model Number Kit Number LP Orifice
CHS-85 81 8124 000 415 (4.15mm)
CHS-110 81 8124 000 52 (5.2mm)
CHS-155-250 81 8124 000 62 (6.2mm)
CHS-300-399 81 8125 000 74 (7.4mm)
Boiler Vent / Air-Inlet Piping
The CHS boiler is certified as a “Category IV” boiler, and requires a “Special Venting
System” designed for pressurized venting. The exhaust gases must be piped directly to
the outdoors using the vent materials and rules outlined in these instructions. Failure to follow these instructions
will result in serious injury or death.