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 1 2 3 4
N
L
1
2
3
4
5
6
5 6
If replacing, take a picture of your old thermostat
connections, label and re-wire as shown in
Secure Controls installer app.
15
Summary of Contents for H3747
Page 1: ...Smart Programmable Thermostat H3747 Installation and commissioning guide...
Page 12: ...A1 1 2 Install the receiver 12 3 X X Fascia plate Mark out the position...
Page 13: ...13 Drill the holes and secure the mounting plate A2 X X 1 M3 5 AB type screws 2...
Page 20: ...Fit the receiver A4 1 2 a b 20...
Page 24: ...Fit the PTD B2 X X 1 2 M3 5 AB type screws 3 Click a b 24...
Page 28: ...Home Away Communication established PTD after establishing communication with the receiver 28...
Page 34: ...Notes 35...
