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6 Using the heating system
6.1 Overview of the controls and display compo-
nents
MAIN SWITCH
The main switch is located on the side of the HDG Compact 25 - 80
boiler. The heating system can be shut down using the main switch.
EMERGENCY STOP SWITCH
The Emergency Stop switch is located next to the control unit of the
HDG Compatronic. If the Emergency Stop switch is pressed, all moving
parts of the heating system are switched off.
If the Emergency Stop switch is pulled out, the main switch must be
turned off and back on again. Only then can all moving parts of the hea-
ting system be switched back on.
CONTROL UNIT OF HDG COMPATRONIC
1Display
2 Buttons
3 Safety temperature limiter
4 Operating mode indicator
Danger!
Danger from electrical current or voltage!
The heating system is not rendered voltage-free by switching off
with the Emergency Stop switch. The heating system is only vol-
tage-free if the main switch is turned off.
After each occurrence of an open circuit in the safety chain, e.g.
limit switch triggered at the opening of the fuel bunker, the main
switch must be turned off and back on again.
Figure 6/1 - HDG Compatronic control unit
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