USER GUIDE
HLS 44
7 (20)
Produal
Oy
Keltakalliontie 18, 48770 Kotka FINLAND Tel: +358-5-230 9200 / Fax: +358-5-230 9210 [email protected]i www.produal.com PROFILE 2: HEATING AND COOLING WITH FAN COIL UNIT
Principle diagram:
Input DI1 U1 S/DI2 Output Y1 Y2 A1 A2 Y3 Y4
Thermal actuator x x
FCRY 3 relay or EC fan x
Note the following parameters:
Parameter Modbus
register Description factory
setting Min Max
EXT.S 40009
External temperature sensor / DI2
contact input OFF OFF 3 OFF=not in use, 1= external NTC sensor, 2=DI2 door/window contact (prevents
both heating and cooling), 3=DI2 condensation switch (prevents cooling)
Cramp 17 Cooling stages 1St 1St 2St 1St = 1 stage, 2St = 2 stages
CSEq 18 Sequence of cooling stages Valve Valve VAV Valve = valve first, VAV = VAV first
Fan= 19
Fan stage simultaneously with the valve
stage On Off On
On = valve and fan stages are working simultaneously, Off = first valve stage,
then fan stage
Fmax% 40033 Maximum fan output 100.0 50.0 100.0 To avoid noise coming from fan, the maximum fan speed output (EN fan) can be
limited.
FANHI 40036 Fan output scaling, high end 100 0 100 The high end of the scaled EC fan control signal (0…10 V)
FANLO 40037 Fan output scaling, low end 0 0 100 The low end of the scaled EC fan control signal (0…10 V)
FAn 23 Fan type 3coil 3coil EC 3coil = 3-speed fan, EC = EC fan
FAN 40038 Fan usage OFF OFF 3 OFF=OFF, 1= cooling, 2= heating, 3= both cooling and heating
FANLI 24 Fan speed 3 disabled ON OFF ON
When FANLI=ON, the fan speed 3 in the automatic mode is disabled (e.g. due
the noise). However, the user can manually engage the speed 3.
When FANLI=ON, the fan speed 3 is allowed in the automatic mode.
Fan control
•The fan can be 3-speed or 0…10 V -controlled (EC motor). In the manual mode, the EC motor works so that the switch position
is 0 = 0 %, 1 = 33 %, 2 = 66 % and 3 = 100 % of the scaled control signal.
•With the FCRY 3 relay module connected to the Y2 output you can control the speed of fan coil or 3-speed fan. For example, when
the FAN parameter is ’2’ and Fan= parameter is ’ON’, the fan works like following:
oTemperature reaches the set point (DZ lower end), the valve closes and after 5 minutes the fan stops.
oTemperature goes below the DZ lower limit, the valve starts to open and the fan is controlled to the speed 1 (Y2 = 3 V)
oThe temperature still decreases, valve opens over 70 %. The fan is directed to the speed 2 (Y2 = 6 V)
oThe temperature still decreases, valve opens over 90 %. The fan is directed to the speed 3 (Y2 = 10 V)
Accordingly in cooling situation, when the FAN parameter is ”1”, the controller functions according to the cooling demand
(temperature increases).
See page 5, Heating and 1-stage cooling
Valve opening before increasing the fan speed
•When the Fan= parameter is ’ON', the EC fan that is connected to the Y2 output works simultaneously with the heating and/or
cooling valve. The fan starts when the valve starts to open and when the valve is fully open the fan works also in full speed. The fan
speed is controlled linearly between the low and high limits.
The fan works for 5 minutes after the valve is fully closed using the speed defined by FANLO parameter.
See page 5, Heating and 1-stage cooling
•When the Fan= parameter is ’OFF’, the 3-speed fan works at speed 1 and the valve is driven fully open. The fan is then controlled to
the speed 2 (66 %) or 3 (100 %) if needed.
See page 5, Heating and 1-stage cooling, valve opens before the fan speed increases
