Ray-Dot RVS-22HA Installation Manual - page 5
RVS-22HA Installation Guide
Here is a brief description of the RVS-22HA main features.
Digital display
A three-digit display provides a high level of accuracy, allowing the user to specify a temperature
to within one tenth of a degree (in Fahrenheit or Celsius units).
Pilot lights
Pilot lights indicating the status of outputs allow you to monitor the operation of the system from
a distance.
Minimum ventilation cycle
When ventilation is not required for cooling, the first stage fans can be operated either
continuously or intermittently to reduce the level of humidity and supply oxygen to the room.
Temperature and minimum ventilation speed curves
The controller can be set to automatically change the temperature set point and the minimum
ventilation speed over a given period of time in accordance with the user’s requirements by
specifying a temperature curve and a minimum ventilation speed curve with up to six different
points each.
Choice of ten motor types
The variation in motor speed resulting from a change in voltage will depend on the make and
capacity of the motor. In order to achieve a high degree of compatibility between controller and
motor, the user can choose from ten different motor types, thus ensuring that the correct
voltages are supplied.
Humidity compensation
The stage 1 minimum speed can be adjusted automatically as a function of relative humidity. As
humidity increases, the minimum speed of stage 1 fans increases proportionally to compensate
for the change.
Full speed fan start up
In order to overcome the inertia of the ventilation system components and de-ice the fan blades
in cold weather conditions, the controller supplies maximum voltage to the variable speed fans
during the two seconds that immediately follow start-ups.
Four independent temperature probe inputs
Up to four temperature probes can be connected to the controller in order to obtain a more
accurate reading of the average room temperature and a faster reaction time.
Overload and overvoltage protection
Inputs and outputs circuitry is protected against overload and overvoltage.
Test mode
A test mode allows the user to simulate temperature changes and verify controller performance.
RAY DOT
Ventilation Control
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