Operation Modes; Constant Airfl Ow Operation (Cav) - S&P CADB/T-HE PRO-REG Series Instruction Manual

Advanced parameter setting
• Used to read the message of the alarm signalled on the main screen.
• Clock programming.
Once in the advanced settings menu navigation is done by the arrows.

9.3. OPERATION MODES

The Pro-Reg units can operate in 3 operating modes:
CAV: Operation at constant fl ow
VAV: Operation at variable fl ow
COP: operation at constant pressure
After a change in the selected operation mode, the fans stop and then start in the new selected mode.
9.3.1. Constant airfl ow operation (CAV)
Mode recommended in installations where it is necessary to maintain a constant airfl ow.
The speed of the fans is defi ned to correspond to a precise airfl ow and to keep it constant.
Independent SAF and EAF fl ow control: SAF and EAF are controlled each one by its respective
pressure transmitter signal. Two pressure transmitters are needed (supply and extraction).
The controller performs the conversion of the signal received from the pressure transmitter
to fl ow, using the relation
different for each model.
This value is already set at factory, so it should not be modifi ed.
It is possible to display the pressure range and the K-factor of the unit, following the sequence:
In case CAV mode is selected, in the Main screen it is showed the actual m
pressure transmitters and also a percentage of the maximum fan speed.
Appearance main screen when the unit is confi gured in CAV mode.
. This parameter K depends on the fan construction and is
24
3 /h of the fans with