Fireye NXF4000 Relay R-407A The 550001339 is frequently used
Yard notes & kiln story
Description
Fireye NXF4000 Relay R 407A The 550001339 is frequently used The 550001339 is frequently used to provide additional "headroom" for control circuits Automated Energy Savings: Features outdoor reset and warm weather shut down to prevent unnecessary boiler operation during mild conditions