ZoneFirst PIRR Relay

The ZoneFirst PIRR is a 24Vac 4PDT Plug-In Relay engineered as a direct high-performance replacement for RR and RMABS relays. Designed for immediate integration into the 4PDR relay socket, this "ice cube" style component is a fundamental requirement for maintaining legacy electromechanical zone control panels, including older TAT Mark IV, V, VII, VIII, XXXI II, and MM-2/3 systems. This relay features gold-flashed silver alloy contacts rated for 3A at 250VAC, ensuring robust switching reliability across four separate single-pole double-throw (SPDT) circuits. This 4-pole double-throw configuration allows for the simultaneous control of up to four separate dampers from a single zone output or master switch. Built to withstand demanding thermal environments, it maintains an operational temperature range of -40°F to 122°F. Whether you are performing a critical HVAC zone control repair or upgrading a 24V master relay, the ZoneFirst PIRR relay offers a seamless plug-and-play solution to restore system integrity without the need for extensive rewiring of the existing socket base.

• Direct Compatibility: Engineered as the exact replacement for RR and RMABS relays in TAT and older ZoneFirst panels.
• Multi-Device Control: The 4PDT configuration effectively allows one zone signal to actuate multiple dampers or accessory loads simultaneously.
• Industrial Grade Contacts: Gold-flashed silver alloy contacts prevent oxidation and ensure low-resistance connectivity for 24V control logic.
• Fast Field Service: Standard 14-pin "ice cube" footprint enables rapid plug-in relay replacement, minimizing system downtime.
• Versatile Application: Frequently utilized as a slave damper relay or for isolating conflicting control signals in complex zoning configurations.

Is the ZoneFirst PIRR compatible with the 4PDR socket?
Yes, the PIRR is the standard 14-pin relay designed specifically for the 4PDR relay socket. It is commonly used in legacy HVAC zoning system repairs where multiple SPDT contact closures are required from a single 24V source.

Can I use a PIRR to replace an older RMABS relay?
Absolutely. The PIRR is the current technical successor to the RMABS. While the plastic casing color may vary (clear, white, or red), the internal electrical specifications and pinout remain identical for 24V 4PDT relay applications.

What are the contact ratings for this relay?
The contacts are rated for 3 Amps at 250VAC. For most HVAC zone motor applications, this provides a significant safety margin for inductive loads like damper actuators and small solenoids.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.