Secure H3747 User manual

Smart Programmable
Thermostat H3747
Installation and commissioning guide

Copyright © 2020-21, SIHPL. All rights reserved. E&OE.
Commercial and confidential
Other product names are trademarks or registered trade names of
their respective owners.
Smart Programmable Thermostat H3747 is registered trade name of
Secure Meters Ltd.
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
product.
2
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).

Receiver H3747
In the box
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)
3

ŸVariant with WiFi module available for remote access
ŸSimple installation for retrofits with minimum wiring changes required
Programmable thermostat display (PTD)
Know your products
ŸSupports boiler plus compliance, load compensation and service interval functionality
Receiver H3747
ŸMains-powered device, compatible with Combination, System and Regular boilers
(Heat+hotwater+zones)
ŸCommunicates wirelessly with PTD, temperature sensor and mobile app
Ÿ7 year no quibble warranty
ŸNo need for WiFi when programming schedule
WiFi Extender HC2.4
ŸGuaranteed 12 year battery life
ŸPlug and play wireless module to control your system remotely
ŸWorks well with 2.4 GHz wireless router
ŸIndependently controls heating and hot water
ŸCost-eective add on device to manage additional heating zones
ŸHome and Away one-click function
ŸEasy and intuitive 7 day programming
Temperature sensor THS
ŸWireless and simple to install
4

What is covered?
Receiver H3747
1
Install Setup system using PTD
2
Programmable
Thermostat
Display PTD
User mobile app
3
Test
Establish communication
How to
5

Shipped with a standard 9-pin back plate, it can easily replace Centaurplus and
Serviceplus time switches and programmers requiring minimum of wiring changes.
Compatibility
The H3747 Smart Programmer is compatible with most heating control systems and is
ideal for compatible system boilers using spring return valves. It can also work with
combination boilers as well as heat pumps requiring On/O control.
Failure to observe precautions may result in fatal injury and equipment
damage
Hazard of electrical shock or explosion
6
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
Identification
sleeves
Or
7
Secure installer guide
mobile app
L
N
GND
1
2
3
4
5
6

Typical system deployments*
2 Zone heating and hot water * All graphics are for illustration purpose only
Boiler
Auto by-pass
Valve
CT
Hot water
Two port
zone valve
Zone 1
Zone 2
PTD
PTD
TS
Or
Channel 1
Channel 2
Channel 3
Wireless
connection
Wired
connection
Pipes
Internet
App WiFi
H3747
8

Typical system deployments*
3 Zone heating and hot water * All graphics are for illustration purpose only
Boiler
BLE
Auto by-pass
Valve
CT
Hot water
Two port
zone valve
Zone 2
Zone 3
PTD
TS
Or
Channel 2
Channel 4
Channel 3
Zone 1
PTD
Channel 1
PTD
TS
Or
9
Internet
App WiFi
H3747

Product dimensions
164 mm 36 mm
106 mm
100 mm 29.5 mm
100 mm
Receiver H3747
Programmable Thermostat Display PTD
10

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.
11
2. Open the app and select Replace a programmer or time switch
3. Choose your existing product and follow the instructions

A1
1 2
Install the receiver
12
3
X
X
Fascia plate Mark out the position

13
Drill the holes and secure the mounting plate
A2 XX
1
M3.5, AB
type screws
2

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.
14

Label your wires
Pin
Label
Pin description
E
Earth
Earth
N
Neutral
Neutral
L
Live
Live
1
On 1
Zone 1 On
2
COM 1/2
COM
3
On 2
Zone 2 On
4
COM 3/4
COM
5
On 3
Zone 3 or hot water On
6
On 4
Zone 4 On
Earth Backplate
N L 123 4
N L 123456
5 6
If replacing, take a picture of your old thermostat
connections, label and re-wire as shown in
Secure Controls installer app.
15

Make connections
Note: Connections shown for mains operated 4x heating zone system. These may vary for
dierent boiler types.
4 zone heating system
A3
E
N
L
Mains supply
N L 123 4 56
Receiver back plate
N L
Boiler
*
Zone 1
valve Zone 2 valve Zone 3 valve Zone 4 valve
ON ON ON ON
Call Call Call Call
This diagram is schematic and should be used for guidance only.
*Note : The receiver has voltage free contacts. A
link between terminal L, 2 and 4 is required for
mains voltage applications.
16

Make connections
Note: Connections shown for mains operated 2x heating zone + 1x water heating system.
These may vary for dierent boiler types.
2 zone heating and hot water system
A3 N L 123 4 56
Receiver back plate
N L
Boiler
*
Zone 1
valve Zone 2 valve Zone 3 valve
ON ON ON
Call CallCall
CCylinder
stat
E
N
L
Mains supply
This diagram is schematic and should be used for guidance only.
*Note : The receiver has voltage free contacts. A
link between terminal L, 2 and 4 is required for
mains voltage applications.
17

Make connections
Note: Connections shown for mains operated 3x heating zone + 1x water heating system.
These may vary for dierent boiler types.
E
N
L
Mains supply
N L 123 4 56
Receiver back plate
N L
Boiler
*
Zone 1
valve Zone 2 valve Zone 3 valve Zone 4 valve
ON ON ON ON
Call Call Call
Call
CCylinder
stat
A3
3 zone heating and hot water system
This diagram is schematic and should be used for guidance only.
*Note : The receiver has voltage free contacts. A
link between terminal L, 2 and 4 is required for
mains voltage applications.
18

Plug in the WiFi extender HC2.4 (optional)
1
2
Remove dummy cover
a
b
Plug in the WiFi adapter
Note : WiFi adapter once installed
cannot be removed
19

Fit the receiver
A4
1
2
a
b
20