DryGair DG12, Installation, Operation And Maintenance Manual

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Appendices
Climate Control System
DryGair Energies Ltd .
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E.2. DryGair Systems with Heating or Cooling
Controlling DryGair units combined with heating or cooling by a climate
control system involves controlling both the humidity and temperature.
DryGair units with the combined Heating and Cooling function come
equipped with a temperature valve controller (CAREL ir33 DIN (DN 33)),
located in the bottom right corner of the electrical compartment.
The temperature valve controller controls the air temperature produced by
the unit by regulating the flow of hot or cold water being delivered to the
system from an external source.
E.2.1. Humidity Control
Connect the DryGair unit to the climate control system as described in
section E.1 above.
E.2.2. Temperature Control
The temperature control is based on the DryGair unit’s temperature sensor.
It should be noted that due to the location and calibration of the temperature
sensor there may be small differences in the readings when compared to the
climate control system. We recommend calculating the difference between the
sensors (
DryGair temperature reading − Climate control temperature reading
), to
allow corrections as needed and for uniform temperature control.
Controlling the DryGair temperature from the climate control system
requires integrating a serial communication card into the temperature valve
controller (CAREL ir33) and connecting it to the climate control system with
a two-pair shielded RS485 communication cable.
Communication is done with the Modbus communication protocol.
Note
To use the temperature control feature, the unit’s fans must be operating.