Fan & Proportional Reheat for Normally Closed Valves Relay Module

Triac 2-Stage Electric Reheat & 1-Stage Fan Relay Module

The KMC REE-5017 relay module is designed primarily for use with fan-powered induction units requiring time-proportional control of electric hot water valves on VAV terminal units in HVAC systems. Both fan and valve outputs are controlled by the thermostat’s heating setpoint.

Adjustment of the fan starting point allows optimum use of warm air in the return air plenum before opening the hot water valve. The start point may be adjusted from on requirement for heat prior to the valve opening or when the valve begins to open. The fan output circuit is capable of handling contactors of up to 10 VA @ 24 VAC.

The valve output circuit provides a 24 VAC control signal output for time-proportional control of Normally Open valves with a PTC (Positive Temperature Coefficient) thermal element actuator. The percent on-time of the (discontinued) VEP- 12/22/34/37 series valves varies in direct proportion to the thermostat’s signal. Therefore, as the thermostat signal increases, the percent on-time of the valve increases. The REE-5017 can control up to three valves. (MEP-3001/3006 replacement thermal actuators for existing valves are still available.)

The REE-5017 is intended for use with the following:

Features:

• Fan output is capable of handling contactors up to 10 VA @ 24 VAC; adjustable to start the unit fan on requirement for heat prior to the valve opening
• Valve output provides a 24 VAC output for timeproportional control of NC VEP series valves, with percent on-time in direct proportion to the thermostat signal
• Provides full adjustment of the unit fan starting point to optimize use of warm plenum air