Technical data

Thermo 90 7 Circuit Diagrams

701

7 Circuit Diagrams

7.1 General

The circuit diagrams (Figs. 702 and 703) show possible

circuits of the heater Thermo 90 with

– 3-times-clock

– TRS equipment

The circuit diagrams (Figs. 704 through 706) show

ssible circuits of the heater Thermo 90 S with

– standard timer

– TRS equipment

– TRS equipment without aux

iliary drive

Fig. 701 shows the pin assignment (X1) for Thermo 90

d Thermo 90 S.

CAUTION

The –poles must not be looped or reversed as some

mponents are controlled by negative polarity.

Fig. 701 Pin Assignment

789101112

654321

1 = Glow Plug +

2 = Temperature Limiter +

3 = Flame Sensor +

4 = Temperature Sensor +

5 = Circulation Pump +

6 = Combustion Air Fan +

7 = Combustion Air Fan –

8 = Circulation Pump –

9 = Temperature Sensor –

10 = Flame Sensor –

11 = Temperature Limiter –

12 = Glow Plug –

View from rear