Secure C1727 User manual

Smart Programmable
Thermostat C1727
Installation and commissioning guide

As part of Secure Meter's continuous endeavour to improve,
product design and specifications mentioned are liable to change.
System functionality information, illustrations and product
aesthetics published in the document may vary from those of your
Smart Programmable Thermostat C1727 is registered trade name of
Secure Meters Ltd.
Commercial and confidential
Other product names are trademarks or registered trade names of
their respective owners.
Copyright © 2020-21, SIHPL. All rights reserved. E&OE.
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The Secure Controls products requires electrical connections at mains voltage and
should 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).

In the box
Receiver C1727 Programmable Thermostat
Display PTD
Pre-paired
Optional (To be purchased separately)
WiFi Extender HC2.4
(Add-on WiFi adapter)
Temperature Sensor THS
(Additional temperature sensor
for extra zones)
Extra PTD
(Additional PTD
for extra zones)
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ŸHome and Away one-click function
ŸEasy and intuitive 7 day programming
ŸVariant with WiFi module available for remote access
ŸWireless and simple to install
ŸMains-powered device, compatible with Combination, System and Regular boilers
(Heat+hotwater+zones)
ŸSimple installation for retrofits with minimum wiring changes required
Programmable thermostat display (PTD)
Ÿ7 year no quibble warranty
ŸGuaranteed 12 year battery life
ŸSupports boiler plus compliance, load compensation and service interval functionality
ŸIndependently controls heating and hot water
ŸCommunicates wirelessly with PTD, temperature sensor and mobile app
Temperature sensor THS
ŸCost-eective add on device to manage additional heating zones
ŸNo need for WiFi when programming schedule
Know your products
Receiver C1727
WiFi Extender HC2.4
ŸPlug and play wireless module to control your system remotely
ŸWorks well with 2.4 GHz wireless router
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What is covered?
Receiver C1727
1
Install Setup system using PTD
2
Programmable
Thermostat
Display PTD
User mobile app
3
Test
Establish communication
How to
5

It works well with compatible combination or system boilers as well as heat pumps
requiring On/O control. Shipped with a standard 6-pin back plate, it can easily replace
Centaurplus and Serviceplus time switches and programmers requiring minimum of wiring
changes.
Compatibility
The C1727 Smart Programmer is compatible with most heating control systems and is ideal
for S and Y plan system boilers using spring return valves.
Failure to observe precautions may result in fatal injury and equipment
damage
Hazard of electrical shock or explosion
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RF
Double insulation protection

Prerequisites
Tools / things you may need: To commission your system, you need:
For installation For commissioning
802.11 B/G/N, 2.4 GHz
wireless router with
internet (If upgrading the
receiver for remote control)
Smartphone
Version 11.0 and
above
Marshmallow (version 6.0)
and above
Flat head
screw driver Philips head
screw driver Drill machine (2.5 mm drill bit)
Wire stripper Plier Hammer
Cable Pencil/Pen Wall anchors
and screws
Measuring tape
Secure Controls PTD
L
N
GND
1
2
3
4
Identification
sleeves
Or
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Secure installer guide
mobile app

Typical system deployments*
Single zone heating and hot water * All graphics are for illustration purpose only
PTD
Internet
Boiler
Zone 1
Auto by-pass
Valve
CT
Hot water
(Two port zone valve)
Channel 1
Channel 2
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C1727
App WiFi
Wireless
connection
Wired
connection
Pipes

Typical system deployments*
Combi-boiler with 1 zone heating * All graphics are for illustration purpose only
Combi-boiler
heating
PTD
Zone 1
Auto by-pass
Valve
Channel 2
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C1727
Internet
App WiFi

Typical system deployments*
Combi-boiler with 2 zone heating * All graphics are for illustration purpose only
Combi-boiler
heating
PTD
Auto by-pass
Valve Two port zone valve
Zone 2
Zone 1
PTD
TS
Or
Channel 1
Channel 2
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Internet
App
C1727
WiFi

Product dimensions
153 mm 32.5 mm
91 mm
100 mm 29.5 mm
100 mm
Receiver C1727
Programmable Thermostat Display PTD 11

Download the installer mobile app
1. Download the Secure installer guide mobile app
If you are replacing an existing programmer or time switch or even performing a fresh
installation, we recommend that you install the Secure Installer Guide mobile app.
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3. Choose your existing product and follow the instructions
2. Open the app and select Replace a programmer or time switch

Install the receiver
A1
12
3
X
X
Fascia plate
13
Mark out the position

Drill the holes and secure the mounting plate
A2 XX
1
2M3.5, AB
type screws
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In case of surface wiring (Optional)
Note : Perform this step only if you have surface wiring.
Break the surface wiring knockout provided on the receiver before proceeding further.
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Label your wires
Pin
Label
Pin description
N
Neutral
Neutral
L
Live
Live
1
O 1
Hot water OFF (NC), channel 1
2
COM
Common
3
On 1
Hot water ON (NO), channel 1
4
On 2
Heating ON (NO), channel 2
If replacing, take a picture of your old thermostat
connections, label and re-wire as shown in
Secure Controls installer app.
N L 123 4
N L 1234
Earth Earth
Backplate Note: NC - Normally Closed, NO - Normally Open
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Make connections
230 V Combi-boiler connection
1 2 34
N L O Com ON ON
Receiver back plate
N LSL
N
L
Combi-boiler
*Note : The receiver has voltage free contacts. A
link between terminal L and terminal 2 is
required for mains voltage applications.
*
A3
N - Neutral, L - Live, SL - Switched Live
This diagram is schematic and should be used for guidance only.
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Make connections
Note: Connections shown for mains operated 2x heating zone system. These may vary for
dierent boiler types.
2x heating zone system
A3
N
L
Heating
valve 1
Heating
valve 2
NL123 4
2
1.0/1.5 mm
Torque <0.5 Nm
N
L
Heating
valve 1
Heating
valve 2
NL123 4
This diagram is schematic and should be used for guidance only.
*Note : The receiver has voltage free contacts.
A link between terminal L and terminal 2 is
required for mains voltage applications
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Make connections
A3
Note: Connections shown for 1x heating and 1x water heating. Connections may vary for
dierent boiler types.
1x heating + 1x water heating system
N
L
Boiler
live out
Heating
valve 1
Hot water
valve
NL123 4
N
L
Bolier
Live Out
Heating
valve 1
Hot water
valve
NL123 4
2
1.0/1.5 mm
Torque <0.5 Nm
This diagram is schematic and should be used for guidance only.
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Make connections
3 Port Valve or Y Plan
*Note : The receiver has
voltage free contacts. A
link between terminal L
and terminal 2 is
required for mains
voltage applications
A3
Call
1 2 34
N L O Com ON ON
Receiver back plate
N
L
*
White
Blue
Green/
Yellow
Orange
Grey
Mid-pos.
valve
NL
Pump &
Boiler
Call
C
Cyl
stat
Sat
CFrost
stat
if
fitted Call
CRoom
stat
Sat
N
This diagram is schematic and should be used for guidance only.
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