Provides overload protection for transformer

Convenient connections for thermostat and heating and cooling equipment wiring

Can be mounted in any indoor location without additional enclosure

Relay is easily replaced without disturbing wiring

Includes relay enclosure

Molded Terminal Numbers and Circuit Diagram on Top of Relay Provide Easy Identification for Wiring and Checking System

Untapped Coil Assures Cooler Operation

Laminated Magnet Construction for Higher Efficiency

Base Designed for Easy Replacement of Competitive Relay

Use to Troubleshoot System Operation

Platinum Positive Temperature Coefficient Sensor

Factory Calibrated

No Settings or Field Calibration Required

Solid State Elements Sense Enthalpy (Temperature and Humidity), Use Two Sensors for Differential Control, Maximizing Energy Savings

Use One Sensor in Outdoor Air for Single Sensor Control, Use Two Sensors, One in Return Air and One in Outdoor Air for Differential Control

Mount in any Position up to 200 Ft (61 M) Away from Economizer Logic Module

Uses thermistor sensing element in ventilation duct systems

Negative temperature coefficient (NTC) causes resistance to decrease as sampled air temperature increases

Requires no settings or calibration

Mounts on mounting bracket with four screws (not supplied)

Close Firmly with Diaphragm that is Both Weight and Spring Loaded

Two Second Maximum Closing Time

Valve Closes on Power Failure, Recommended for Final Shut-Off Service

Set Opening Time with Various Sized Bleed Orifices or Adjustable Bleed Valve