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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
The ZoneFirst PIRR is a 24Vac 4PDT Plug-In Relay engineered as a direct high-performance replacement for RR and RMABS relays
Featuring a robust cast iron body paired with premium stainless steel trim
installing this OEM-spec part is essential for maintaining the ANSI B109
Temperature Element
Key Benefits: OEM Compatibility: Exact replacement for Trane ELM1042 (superseded by ELM01042/X09130063010) ensuring precise fit in CHHB compressors
Lochinvar & A.O. Smith 100166064 Pressure Switch 321702-401 The ZoneFirst PIRR is aThe Lochinvar & A. O. Smith 100166064 Pressure Switch is a critical safety component engineered for precise airflow monitoring in high efficiency water heaters and condensing boilers. Designed to prove the inducer motor draft before the ignition sequence begins, this genuine OEM pressure switch prevents the burner from firing if unsafe venting conditions, such as flue blockages or intake restrictions, are detected. This mechanical to electrical