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Electrical installer
Installation, use and maintenance manual – K18 Hybrigas
37
4
4.5
ALARM INDICATOR LAMP
This paragraph is not applicable in case of use of system
controller OQLT019 or of chronothermostat OCDS007.
It is possible to connect a lamp indicating an appliance’s alarm
(for both the heat pump module and the boiler module) to the
Electrical Panel inside the appliance.
To connect the alarm indicator lamp, follow the instructions
below.
Figure 4.6
1. Access the connection terminal block according to Proce-
dure 4.2
2. The cable required to connect the lamp must be shielded
2x0.75 mm².
3. Cut a suitable length of cable.
4. Connect the cable to terminals AL and AL.
5. The connection cable must be kept separate from mains
voltage cables.
The cable may not be longer than 30 metres.
Figure 4.6
Alarm indicator lamp connection wiring diagram
L
phase
N
neutral
Components NOT SUPPLIED:
LA
general alarm indicator lamp
PTR
safety transformer with secondary voltage ≤ 24V (compliant
with norms IEC EN 61558-2-6)
The AL lamp switched on indicates an appliance's alarm.
To know the type of alarm, read through the sight glass
(reference I Figure 1.3
p. 10), the operating code on
the display of the electronic board and refer to Table
4.6
REMOTE THE BOARD ERROR RESET
This paragraph is not applicable in case of use of
OQLT019 system controller.
The error reset for the heat pump module of the K18 Hybrigas
unit may be remoted by connecting a dedicated button to the
terminal block in the Electrical Panel inside the appliance.
Connect the button as instructed below.
Figure 4.7
1. Access the connection terminal block according to Proce-
dure 4.2
2. The cable required to connect the reset button must be
shielded 2x0.75 mm².
3. Cut a suitable length of cable.
4. Connect the cable to terminals COM and RES.
5. The connection cable must be kept separate from mains
voltage cables.
The cable may not be longer than 30 metres.
It is not possible to remote the boiler module alarm reset
command. The reset command of this module must be
given by pressing the appropriate button on the boiler
panel (detail 4 Figure 1.15
p. 21).
Figure 4.7
Board error reset connection wiring diagram
COM
common
RES
reset errors
Components NOT SUPPLIED:
PLS
release button
4.7
TEMPERATURE PROBES
It is possible to connect one or two temperature probes, AUX
PROBE 1 and/or AUX PROBE 2 to control specific functions de-
scribed in Paragraph 5.5.4
The following instructions to electrical connection of temper-
ature probes do not apply if the OQLT019 system controller is
used (e.g. for the K18 Hybrigas EVO units).
In the presence of this controller, follow the connection instruc-
tions of the temperature probes provided in the relevant instal-
lation manual.
4.7.1
GHP immersion temperature probe
The probe connected to the AUX PROBE 1 input is factory in-
stalled inside the K18 Hybrigas unit on the delivery mani-
fold downstream of the boiler coupling (see detail S Figure
p. 17).
The probe is only used in this position in case of distribution with
only primary water circuit in the absence of the buffer tank (see
Figures 3.3