The Reznor 197028 high altitude pressure switch is a vital safety component specifically calibrated for use in gas-fired unit heaters operating at higher elevations. This mechanical switch continuously monitors the differential pressure generated by the draft inducer fan to verify that toxic combustion exhaust gases are venting safely out of the building envelope.
Configured with a specialized 67/100 WC threshold, this switch accounts for the thinner air and lower atmospheric pressure characteristic of high-altitude regions. By verifying adequate draft before allowing the main gas valve to open, the switch prevents incomplete combustion, dangerous rollout conditions, and hazardous carbon monoxide accumulation.
When replacing worn safety controls on commercial or industrial unit heaters, matching precise model numbers and factory pressure settings is crucial for system compliance. This genuine replacement component provides HVAC service technicians with a reliable option to restore safe, uninterrupted heating performance during cold winter months.
Leave a Reply