IF you are installing a UDAS-125 or UDBS-125 Reznor Separated Combustion heater above 6000 feet (1830 meters), then you will also need to install a high altitude kit. A Reznor DJ20 High Altitude Kit /Pressure Switch is required. Several kits are available and specific to the Reznor heater you are installing.
The 197205 High Altitude Kit is the appropriate kit required for high altitude installation of the following Reznor Heaters:
- Separated Combustion Fan-Type Reznor Heater UDAS-125
- Separated Combustion Blower-Type High Static Reznor Heater UDBS-125
Please note if you are installing your Reznor Heater above 2000 feet the input rate must be derated and this is done simply by adjusting the valve outlet (see installation manual). You do not need to install anything further.