HDG M299, Operation Manual

Page: 126 / 176

6 Using the heating system – Maintenance function
126
HDG M299/300/350/400 - Version 1 - en
©
HDG Bavaria GmbH 07/2008
6.12 Maintenance function
The maintenance function is used to interrupt the current operating
mode and activate the burning out phase. When the burn-out time
has elapsed, maintenance is enabled and the primary and secondary
air fans switch off. Only the flue gas fan continues running with
controlled vacuum pressure. This serves to suction up dust and
remove radiant heat during cleaning and maintenance work.
After the cleaning and maintenance work is completed, the function
must be deactivated. The boiler switches back to the previous mode.
1. Press the F5 key under the standard display screen.
✓
You are in the
Service
menu.
✓
The display changes to the
Service 5-01
submenu.
2. Press the F3 key under the
Maintenance
command.
✓
The display changes to the
Function 1-10
submenu.
3. Press the F4 key under the
On
command.
✓
The message
Waiting for enabling
appears in the display.
✓
The boiler switches to the burning out phase .
✓
When the burn-out time is complete, the message
Maintenance enabled
appears in the display.
Service 5-01
Digital inputs 0-15 00000000 00000000
Digital outputs 0-15 00000001 00000000
Mainte
n.
END
Function 1-10
Maintenance : On
Waiting for enabling
On Off END
Function 1-10