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FERSYSTEM TECH 31 C
Instructions for use, installation and maintenance
Fer FERSYSTEM TECH 31 C Instructions For Use, Installation And Maintenance page 17
Wall-mounted boiler
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FERSYSTEM TECH 31 C
The user must never change the unit's power cable. If the cable gets damaged, switch off the unit
and have it changed only by professionally qualified personnel. If changing the electric power cable,
use only "HAR H05 VV-F" 3x0.75 mm
Access to the electrical terminal block
Follow the instructions given in fig. 20 to access the electrical connection terminal board. The layout of
the terminals for the various connections is given in the wiring diagram in the Technical Data chapter.
Key
72
Room thermostat (Volt Free)
138 Outside temperature sensor
139 Room unit (OpenTherm)
2
cable with a maximum outside diameter of 8 mm.
fig. 20
Cod. 3540U320 - 09/2009 (Rev. 00)
fig. 21
17
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