Three Ventilation Stage Control (TVS)

A simple three stage automatic control

The Three Ventilation Stage Control (TVS) automatically controls the temperature in a room by operating two variable speed fans and a single-speed fan or heater.

To control the temperature, the TVS controls the connected ventilation and heating equipment according to programmed settings. The control comes with seven factory-configured operating programs, which can be easily reconfigured for your ideal situation.

The TVS displays alert conditions such as high and low temperatures, power failure, and low line voltage, and can also connect to an alarm siren, alarm panel, or auto-dialer.

The TVS is ideal for poultry, livestock, greenhouse, or light-industrial buildings.

Features

Two variable stage outputs
One relay stage output
Alarm relay
Seven configurable operating programs
Adjustable temperature set-point and differential
Adjustable high/low temperature alert settings
Three-second full-power-turn-on to minimize fan ice-up
Four-digit LED display and status LEDs
Power-failure memory protection
Fahrenheit and Celsius display
Error code display for troubleshooting
30-foot temperature probe, extendable to 500 feet
Overload protection fuses
Rugged enclosure (corrosion resistant, water resistant, and fire retardant)
CSA approval
Two-year limited warranty

Electrical ratings

Input:
Variable stages:

Variable stage fuses:
Relay:

Relay fuse:
Alarm relay:

120/230 VAC, 50/60 Hz
7.5 A at 120/230 VAC, general-purpose (resistive)
5 FLA at 120/230 VAC, PSC motor
1/3 HP at 120 VAC, 1/2 HP at 230 VAC, PSC motor
12 A, 250 VAC ABC-type ceramic
6 A at 120/230 VAC, general-purpose (resistive)
1/3 HP at 120 VAC, 1/2 HP at 230 VAC
360 W tungsten at 120 VAC
12 A, 250 VAC ABC-type ceramic
0.4 A at 125 VAC; 2 A at 30 VDC, resistive load
0.2 A at 125 VAC; 1 A at 30 VDC, inductive load

Additional information

TVS user manual (PDF - 1396K)
TVS feature sheet (PDF - 126K)
Ventilation control overview (PDF - 35K)

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