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Mounting /
dismounting
Wiring
44 / 60
Siemens
Smart Infrastructure
4.
Handling
4.1
Mounting and installation
Mount the room thermostat on the conduit box. Do not mount on a wall in niches or
between bookshelves, behind curtains, above or near heat sources, or exposed to
direct solar radiation. Mount it approximately 1.5 m above the floor.
• Do not apply excessive force on screws! The deformation of the mounting
frame may lead to improper connections and operation of the unit.
• Mount the room thermostat in a clean, dry indoor place without direct airflow
from heating/cooling equipment, and not exposed to drips of water.
• For RDF800KN only, in case of limited space in the conduit box, use
mounting spacer ARG70.3 to increase the headroom by 10 mm.
• Before removing the front cover, disconnect the power supply.
See Operating Instructions A6V11272225 [1] enclosed with the thermostat.
• Comply with local regulations to wire, protect and earth the thermostat.
• The unit has no internal fuse for supply lines to fan and actuators. To avoid risk
of fire and injury due to short-circuits, the AC 230 V mains supply line must
have a circuit breaker with a rated current of no more than 10 A.
• Use only valve actuators rated for AC 230 V.
• Properly size the cables to the thermostat, fan and valve actuators for
AC 230 V mains voltage.
• RDF880KN...: The wiring cross section used for power supply (L, N), and the
AC 230 V outputs (Qxx - N) must be adapted to the preceding overload
protection elements (max 10 A) under all circumstances. Comply under all
circumstances with local regulations.
• Cables of SELV inputs X1-M/X2-M: Use cables with min. AC 230 V insulation,
as the conduit box carries AC 230 V mains voltage.
• Input X1-M or X2-M: Several switches (e.g. window contact) may be
connected in parallel. Consider overall maximum contact sensing current for
switch rating.
• KNX communication cables (input CE+/CE-): Use cables with min 230 V
insulation, as the conduit box carries AC 230 V mains voltage.
• When KNX bus power supply is connected on the line with communicating
thermostats and Synco controllers, the internal KNX power supply of the
Synco controllers must be switched off.
• Disconnect from power supply before opening the thermostat's cover.
RDF880KN.. Basic documentation
A6V12318532_en--_a
2021-03-22
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