Secure C1727 Manual page 22

5
Installing the receiver (C1727/H3747)
The thermostat and receiver are already paired out of the box and have default schedule
as well. The C1727 uses the standard 6 pin wall plate and the H3747 the 9 pin one. Both
have volt free contacts. The links to the full installation guides if required can be found at
the beginning of this guide. The below covers installing both C1727 and H3747 onto a
heating system.
If you are going to control hot water with the system, the PTD will ask you this during
setup and if Yes is selected the water terminal is automatically assigned as shown below.
Where 2 port valves are used they should be spring return.
The mains supply terminals are intended to be connected to the supply by means of fixed
wiring. The recommended cable sizes are 1.0mm or 1.5mm
Always isolate the mains before carrying out electrical work
Note:
All illustrations are for reference purposes only.
22 of 40
The Secure Controls products require electrical connections at
Mains voltage and must only be installed by a suitably competent
person, in accordance with Part P of the Building Regulations,
BS 7671:2008, (e.g. an electrical contractor registered with an
authorised competent person self-certification scheme.
BGX701-294-R03, PTD user manual Public