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R1K 120 - RAD - ING - Manuale - 2201.1_SKM1_no_INAIL_firm.L226F
1 C
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4 - R1
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2. INSTALLATION
INST
ALLER
1.1.20. OPTIONAL ELECTRICAL
CONNECTIONS
The cables should be inserted inside the boiler
using the fairleads ‘P1’ and ‘P2’ placed on the
hydraulic connections bottom plate (see fig. 1).
Make a hole on the fairlead, smaller than the cable
diameter, to make sure that the air cannot pass
through.
To wire the optional items below:
• (SE) OUTDOOR TEMPERATURE SENSOR CODE
73518LA
• (TA) ROOM THERMOSTAT
• (CR) OPEN THERM REMOTE CONTROL CODE
40-00017
operate on the terminal block placed inside the
control panel as follows:
DANGER
Cut off the voltage from the main switch.
› remove the boiler front casing (see chapter
ACCESSING THE BOILER); unscrew the screws
and remove plate “A” (see fig. 2).
› After removing the plate, connect the electrical
cables to terminal block “B” (see fig. 2):
· For the outdoor temperature sensor connect
the two non-polarized conductors to the Se-
Se contacts.
· For the room thermostat or remote control,
first remove the bridge on the Ta-Ta contacts
and then connect the two non-polarized
conductors to the Ta-Ta contacts.
After performing these operations, remount plate
“A” and the front casing.
NB:
In case of simultaneous presence of outdoor sensor
and remote control, the main P.C.B. only sends the external
temperature value to the remote device without using it for
modulation. The communication between P.C.B. and the remote
control takes place independently from the boiler’s operating
mode and after establishing the connection, the user interface
on the P.C.B. is disabled and the display shows the symbol ‘
’.
P1 P2
L
N
Se
Se
A
Ta
Ta
B
SE
TA
CR
fig. 2
fig. 1
Summary of Contents for R1K 120
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