BLUEHELIX TECH RRT 28 C
14 EN
cod. 354M1070 - Rev. 01 - 07/2018
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE CONTACTS ONLY. CONNECT-
ING 230V TO THE ROOM THERMOSTAT TERMINALS WILL PERMANENTLY DAMAGE THE PCB.
When connecting a time control or timer, the power supply can be taken from the back of the PCB housing,
see fig 20. or with the supplied batteries if required (design specific).
The room thermostat connections fig 20 Item 72 is also OpenTherm compliant this can be used to connect any
of our OpenTherm controls.
Accessing the electrical terminal block and fuse
Remove the front panel ( ”Opening the front panel” on page 33) to access the terminal block (M) and fuse (F) by pro-
ceeding as follows (fig. 21 and fig. 22). The terminals indicated in fig. 22 must be with voltage-free contacts (not
230V). The arrangement of the terminals for the various connections is also given in the wiring diagram in fig. 60.
NOTE - The terminals 14 &15 are 230v Live & Neutral to power an external clock if required (Optional extra).
Ferroli OpenTherm RF Smart Control (option) part number Y87RFC2124 should be connected to terminals 5 & 6
(see 139 fig. 22 below) It does not require a 230v connection
fig. 21
fig. 22
72
139
123456
138
A
14 15
230V
supply to
external
controls
F
M
A On/Off switch (option) configurable
138 Outside sensor (option) see OTC section
139 OpenTherm room timer connection (option)
72 Programmable room thermostat (option)
14 & 15 230v supply for external controls (option)
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