TDA Thermodual Installation Manual
42
IN1233
Oct 2014 Edition 5
Installation Servicing Instructions
Output 20 of the main control board can be used for the following alarm signals by means of
a 230v output:
Fault - Activates if a fault occurs
Pellet Mode - Activates when the boiler is operating in pellet mode
Log Mode - Activates when the boiler is operating in log mode
12.4 Alarm Signal
Connect the three port mixing valve of heating circuit 2 pump station to the main control
board output number 26.
Connect the pump of heating circuit 2 pump station to the main control board output number
27.
Connect a temperature sensor to the flow pipe on the heating side of the heating circuit 2
pump station to the main control board input number
Connect an analogue room device (if used) to the main control board input number 33 as
follows:
SHT Analogue Room Device
1=M, 2=F2, 3=F1
12.2 Weather
Compensated
Heating Circuit 2
Connect the pump to the hot water cylinder to the main control board input number 21.
Connect the temperature sensor from the hot water cylinder to the main control board input
number 30.
12.3 Hot Water
Cylinder