
HAMWORTHY HEATING LTD
51
Merley Boiler Sequence Controller
500001210/D
Input H1 and H3
The following settings for input H1 apply specifically ..
Input H..
Function of input H...
Changeover of operating mode
Heating circuit
The operating modes of the heating circuits are switched to Protection mode via the
H
…
terminals (e.g. using a remote telephone switch).
DHW
DHW heating is locked only when using setting 1: HCs+DHW.
Heat generation lock
The heat source is be locked via the H
…
terminals. All temperature requests from the
heating circuits and DHW are ignored. Frost protection for the boiler is maintained.
The chimney sweep function can be activated although the heat generation lock is
switched on.
Line no.
Operating line
5950
Function input H1
Operating mode changeover
HCs + DHW
Operating mode changeover HC1
Heat generation lock
Error / Alarm message
Min flow temperature setpoint
Excess heat discharge
Heat request 10v
5951
Contact type input H1
NC
NO
5952
Minimum flow temperature setpoint H1
5954
Temperature value 10v H1
Input sensor BX
Depending on the selection made, setting of the sensor input assigns appropriate ex-
tra functions to the basic diagrams. For detailed information, refer to section
“
Application diagrams
“.
Line no.
Operating line
5930
5931
5932
5933
Sensor output BX1, 2, 3, 4
None
DHW sensor B31
Return sensor B7
DHW circulation sensor B39
Common flow sensor B10
DHW charging sensor B36
Common return sensor B73
Cascade return sensor B70