Electric Heater Control - Produal HLS 44 User Manual

ELECTRIC HEATER CONTROL

The controller can control an electric heater by using a solid state relay PR 50/440 between the A2 output and the heater. The relay must be
equipped with a PR 50Vac auxiliary card.
IMPORTANT: The controller is not equipped with a heater overheating protector. The overheating protection must be included in the heater
itself. The overheating alarm signal can be read by DI input, but the signal does not deactivate the heater control.
The overheating alarm signal can be connected to the DI1 or DI2 input, and the signal can then be read via the Modbus. DI input must be set
to "not in use" position (DI1mod = 0 or EXT.S = OFF).
Input DI1
Overheating alarm (x)
Note the following parameters:
Modbus
Parameter Description
register
External temperature sensor / DI2
EXT.S 40009
contact input
DI2dir 28 DI2 operation direction (nc/no)
DI1mod 40021 DI1 mode
DI1dir 40022 DI1 operation direction (nc/no)
Produal Oy Keltakalliontie 18, 48770 Kotka FINLAND
U1 S/DI2
(x)
factory
setting
OFF
1
0
0
Tel: +358-5-230 9200 / Fax: +358-5-230 9210
Output Y1 Y2
Thermal actuator
24 Vac controlled solid
state relay
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)
0 1 0 = nc, 1 = no
0= not in use, 1= control to day mode with a nc/no switch connected to the DI1
0 1
input
0 1 in the night mode: 0 = nc, 1 = no
USER GUIDE
A1 A2 Y3 Y4
x
x
info@produal.fi www.produal.com
HLS 44
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