www.stromltd.com
STROM LIMITED
2020
30
Electric Boilers
CONNECTING EXTERNAL THERMOSTAT
Because no programming or temperature control can be done by the boiler itself it is necessary to fit an external
thermostat. It is recommended that you fit time and temperature control in the form of seperate programmer
and thermostat(s) or in the form of all in one programmable thermostat(s). More information can be found on
system types on page 11.
The following information is provided as a guide only and refers to Strom manufactured heating controls,
however you should follow the guidance of the manufacturer when connecting the thermostat to the Strom
Boiler. We regret that we cannot offer any wiring advice of competitor products, and can only refer in those
circumstances to the connections on our boiler.
BOILER WIRING:
Switch Live Live Out Neutr
al Out
1
2
3
8
13
15
9 10 11 12
14
1. Terminal Block
2. 6 Amp Fuse
3. Heating Power Board
4. Water Power Board
5. Water Outlet Temp. Sensor
6. Water Inlet Temp. Sensor
7. Water Flow Sensor
8. Touch Control Panel
9. Pressure Switch
10. Heating Cut-out
11. Heating Flow Temperature
12. Heating Return Temperature
13. Buzzer
14. Heat Exchanger Power
15. Internal Memory Battery
All wiring must be carried out in accordance with current IEE BS7671 wiring regulations.
All electrical connections must be made by a qualified electrician.
4
5
6
7
BOILER
PROGRAMMABLE
THERMOSTAT
SL
L
N
E
C ON OFF
THERMOSTAT WIRING:
The PCB control board for the heating circuit is located in the right
hand side of the boiler between the pump and the main electrical
supply point.
