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1.43
Katherm HK
Ready-to-install trench heaters with EC tangential fan
Assembly and installation instructions
20.3 Heating/cooling changeover via clip-on sensor in 2-pipe systems
20.4 Setting DIP switch no. 3, DIP switch no. 4
The changeover between heating and cooling is performed as standard in
2-pipe systems via an external contact and the digital input DI2.
If there is no external contact to change over between heating and
cooling, the changeover can be made via a clip-on sensor.
Order the clip-on sensor separately and, after installation, wire it to the
analogue input AI2 of the KaControl control board (PCB) (as per the wiring
diagram). The configuration is documented in the following description.
If the changeover between heating and cooling is performed by a clip-on
sensor, then the DIP switches must be set to
DIP switch no. 3 = ON
DIP switch no. 4 = OFF.
The functions of the DIP switches are described in Section 18 "Adjusting
the unit configuration using Dip switches”.
The slave units in one control zone have to be fitted with a clip-on
sensor to provide the function of "Heating/cooling changeover
using clip-on sensor".
The installation of a 3-way valve is recommended when using a
clip-on sensor for heating/cooling changeover.
20.5 Setting automatic heating/cooling or day/eco changeover mode
Parameter P38
Parameter O 38 is used to set Automatic mode, as Heating and Cooling
modes can only be specified via the clip-on sensor.
Parameter P38 can also be set for "ON/OFF and Eco/Day" function.
Parameter P38 can also be set for Day/Eco changeover.
The ON/OFF key function and the timer programs are specified using
parameter P38.
Use the ON/OFF button and the timer programs to switch the unit on and
off or between Eco and Day mode.
Summary of Contents for Katherm HK Series
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