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Function
When the ground sensor detects moisture while
the ground temperature is so low that there is a
freezing hazard, the control unit starts snow melt-
ing via the external control equipment. When the
ground sensor is dry, the snow melting is shut
off. The unit can be programmed to maintain the
heating activated for the desired time even if the
ground sensor is dry.
1. Install the control unit indoors either direct-
ly on the wall or on the DIN rail.
2. Start/stop signal to the property's BMS
is drawn from the pump inlet in the LK
Control unit ETO2 terminals 3, 4. (NOTE!
Potential-free contact).
3. Connect the LK Ground sensor ETOG ac-
cording to the instruction under the head-
ing
LK Ground sensor ETOG
.
4. Pump and actuator are not connected to the
LK Control unit ETO2 in this case.
5. Connect the power supply, see the circuit
diagram.
6. Adjust the control unit, see the heading
Adjustment to start/stop of external control
equipment.
Design
LK Control Unit ETO2 is meant to be used pri-
marily as LK Snow melting must be controlled in-
termittently. The equipment consists of LK Con-
trol Unit ETO2, LK Ground sensor ETOG and LK
Pipe sensor ETF.
LK Control Unit ETO2 offers the following:
• Energy-efficient control of the snow melting
system.
• Simple menu navigation.
• Clear background-lit display.
• Alarm relay.
Note!
The control unit can, depending on how it is set,
either maintain/regulate the flow temperature to
the snow melting system or only generate start/
stop signals to the external control equipment.
The instruction is divided into two different chap-
ters depending on the function desired. If the unit
should maintain/regulate the flow temperature,
follow the instructions
Assembly instruction,
Maintaining the flow temperature
. If the unit
should send start/stop signals to external control
equipment, follow the instructions below.
Assembly instruction, start/stop of
external control equipment (BMS)
The following instruction is applicable when
LK Control unit ETO2 must send start/stop sig-
nals to the external control equipment. The con-
trol unit and sensor must only be installed by an
authorized electrician.
LK Control Unit ETO2
EN.31.C.5.1907
Assembly instructions | LK Control Unit ETO2
