HAMWORTHY HEATING LTD
72
Merley Boiler Sequence Controller
500001210/D
Central functions
These settings are only relevant for device address 1.
Range of action of
changeover
The range of action of central changeover can be defined.
This applies to the following types of limitation:
Summer changeover (when selecting
”
Central
“
on line 6623)
Summer changeover (with
”
Central
“
setting on operating line 6621)
Entries:
Segment: Changeover takes place with all controllers in the same segment.
System: Changeover takes place with all controllers in the entire system (in all
segments). The controller must be located in segment 0!
Summer changeover
The scope of summer changeover is as follows:
Local entry:
Local action; the local heating circuit is switched based on operating lines 730,
1030 and 1330.
Central entry:
Central action; depending on the setting made on operating line
“
Action changeover
functions
“, “
either the heating circuits in the segment or those of the entire system
are switched based on operating line 730.
Line no.
Operating line
6620
Action changeover functions
Segment
System
6621
Summer changeover
Local
Centrally
6623
Changeover operating mode
6624
Manual source lock
6625
DHW assignment
Local HC
’
s
All heating circuits in the segment
All HC
’
s in system
6631
External source with Eco mode
Off
-
!!
-
On DHW
-
!!
-
On
Changeover of operating
mode
The scope of the operating mode changeover via input H is as follows:
Local entry:
Local action; the local heating circuit is switched on and off.
Central entry:
Central action; depending on the setting made on operating line
“
Action changeover
functions
“,
either the heating circuits in the segment or those of the entire system are
switched based on operating line 730.
Manual source lock
The range of action of summer changeover is as follows:
Local entry:
Local action; the local source is locked.
Entry segment:
Central action; all sources of the cascade are locked.