Two-Zone Switching Relay with DPST Switching, 120VAC

Honeywell RA832A1066/U Two-Zone Switching Relay – 24V Coil with DPST Contacts for Line Voltage Applications

The Honeywell RA832A1066/U is a multi-zone switching relay used for intermediate switching of line-voltage loads from a low-voltage control signal. Designed for hydronic heating applications, it features a 24 VAC coil and DPST switching configuration. This relay supports simultaneous control of two circuits and includes one contact set rated for low-voltage or millivolt auxiliary loads such as PowerPile systems.

Its compact steel enclosure is suited for indoor installations in mechanical rooms or equipment panels. The unit is commonly installed in residential or light commercial systems requiring control of circulator pumps, fan motors, or zone valves.

Key Functional Features

• Control Voltage: Operated by a 24 VAC signal from a low-voltage thermostat or controller
• Relay Configuration: Double Pole, Single Throw (DPST); one pole rated for low-voltage auxiliary circuits
• Multiple Load Compatibility: Suitable for switching line voltage loads (120/240 VAC) and low-voltage pilot circuits
• Integrated Transformer: Supplies 24V control power where required
• Accessible Wiring: Top-mounted screw terminals for simplified field connections

Technical Specifications

• Model: RA832A1066/U
• Coil Voltage: 24 VAC
• Contact Ratings: 7.4 A at 120 VAC, 3.7 A at 240 VAC (resistive loads)
• Switching Action: DPST with auxiliary low-voltage circuit support
• Frequency: 50/60 Hz
• Ambient Temperature Range: 105°F to 115°F (operating conditions)
• Enclosure Dimensions: 5-1/4 in H × 4-1/4 in W × 2-5/16 in D

Installation Guidelines

This relay is intended for use in HVAC control systems and should be installed in accordance with applicable local and national codes. Electrical connections should be made by qualified personnel. The unit mounts securely to flat surfaces near the appliance or control panel. Ensure that line voltage and low-voltage circuits are properly isolated during wiring.

Common Applications

• Circulator pump control in multi-zone hydronic heating systems
• Fan switching or auxiliary load control using thermostat signal
• PowerPile or millivolt systems requiring low-voltage relay activation

Operational Notes

The RA832A1066/U provides dual switching capability in a single enclosure, making it suitable for installations requiring both high-voltage and auxiliary low-voltage control. The relay design allows for flexibility in zoned heating systems and simplifies service with accessible terminal labeling.