Thermostat Function - Produal HLS 44 User Manual

THERMOSTAT FUNCTION

By choosing the thermostat mode, the actuators can be controlled by a thermostat type control. Thermostat mode can be activated either for
cooling or heating side or for both.
•
When using the thermostat mode in the heating side, the heating valve opens fully when the temperature falls below the DZ lower
limit. The heating valve closes when the temperature reaches the set point (SP).
•
When using the thermostat mode in the cooling side, the cooling valve opens fully when the temperature rises over the DZ higher
limit. The cooling valve closes when the temperature reaches the set point (SP).
In the night mode the controller works according to the chosen function, either in thermostat mode or in frost guard mode.
The thermostat mode affects to the outputs A1, A2, Y3 and Y4.
ON/OFF actuator functions:
Input DI1
Note the following parameters:
Modbus
Parameter Description
register
External temperature sensor / DI2
EXT.S 40009
contact input
SPcnt 40011 Centre of user set point area
±SP °C 40012 Use set point area limits
DZ °C 40014 Dead zone
nI OP 20 Night operation mode
FAN 40038 Fan usage
Fmin% 40032 Minimum fan output
Fmax% 40033 Maximum fan output
Vmin% 40034 Minimum of VAV output
Vmax% 40035 Maximum of VAV output
ThrmC 29 Thermostat function, cooling
ThrmH 30 Thermostat function, heating
Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND
U1 S/DI2
factory
setting
OFF
21.0
±3.0
0.2
DZ
OFF
0.0
100.0
0.0
100.0
OFF
OFF
Tel: +358-5-230 9200 / Fax: +358-5-230 9210
Output Y1 Y2
Thermal actuator
VAV (x)
FAN (x)
Min Max
OFF=not in use, 1= external NTC sensor, 2=DI2 door/window contact (prevents
OFF 3
both heating and cooling), 3=DI2 condensation switch (prevents cooling)
18.0 26.0 Centre of user set point area
±0 ±16 The user can adjust the set point within these limits.
0.0 3.0 Used as a hysteresis in the thermostat mode.
DZ FG DZ = dead zone, FG = frost guard mode
OFF 3 OFF=OFF, 1= cooling, 2= heating, 3= both cooling and heating
0.0 50.0
50.0 100.0
0.0 50.0
50.0 100.0
OFF On OFF = P/PI controller, On = thermostat mode
OFF On OFF = P/PI controller, On = thermostat mode
USER GUIDE
A1 A2 Y3 Y4
x x
info@produal.fi www.produal.com
HLS 44
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