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Setting the DIP Switches
Note
●
When PCB DIP switch 2 #8 is set to On, ensure that CPVC or polypropylene piping is used for exhaust
venting.
●
This unit may be installed at elevations up to 10,100 ft (3,078 m) for use with natural gas and
propane. To use the unit at a specific altitude, the DIP switches should be set as described above.
●
High Altitude: Above 2,000 ft (610 m), the unit will de-rate by 3% for each 1,000 ft (305 m) of altitude
gain for NG and 4% de-rate for propane gas.
●
For NG, if you install the unit at above 5,400 ft (1,646 m), it is required to change the Gas Orifice
for high altitude. Be careful not to confuse it with the Gas Orifice for LP. Refer to “12.1 Gas & High
Altitude Conversion” on page 120 for details.
●
Common vent installations for use with natural gas and propane are only approved for up to 4,500 ft.
WARNING
●
ALWAYS install the High Altitude Conversion Kit if needed based on the elevation of the installation location.
●
For use with Propane (LP) gas, the Propane Gas & High Altitude Conversion Kit MUST be used for elevations
up to 10,100 ft
.
●
The Natural Gas High Altitude Conversion Kit is located inside the boiler cabinet. You will need to remove
the front cover to access the Natural Gas High Altitude Conversion Kit.
●
Refer to the Natural Gas High Altitude Conversion Guide and verify the orifice is appropriate for the boiler.
Replace the orifice following the Natural Gas High Altitude Conversion Guide instructions if required.
