HAMWORTHY HEATING LTD
32
Merley Boiler Sequence Controller
500001210/D
24
-
hour heating limit
The 24
-
hour heating limit is used to switch the heating on and off in the
course of the day, depending on the outside temperature. This function is
used primarily during spring and autumn to respond to short
-
term
temperature variations.
Example:
Setting line
e.g.
Comfort setpoint (TRw)
22°C
24
-
hour heating limit (THG)
-
3°C
Changeover temperature (TRw
-
THG) heating off
=
19°C
Switching differential (fixed)
-
1°C
Changeover temperature heating on
=
18°C
By changing the value entered, the respective heating periods will
be shortened or extended.
Increase:
Heating mode will start
earlier,
changeover to ECO
later.
Decrease:
Heating mode will start
later,
changeover to ECO
earlier.
-
The function is not active in operating mode
”
Continuously Comfort temperature
“
-
The display shows ECO
-
To give consideration to the building
’
s thermal dynamics, the outside temperature will be
attenuated
Flow temperature setpoint limits
Line
no.
Operating line
HC1
740
Flow temp setpoint min
741
Flow temp setpoint max
Using this limitation, a temperature range for the flow temperature setpoint can be
defined. If the flow temperature setpoint demanded by the heating circuit reaches the
relevant limit and the heat request increases or decreases, the flow temperature
setpoint will be maintained at the maximum or minimum limit.
0
10
20
30
40
50
60
70
80
90
100
TV
max
min
akt
°C
23
58
Z
09
TVw
TVmin
TVmax
TVw
Current flow temperature setpoint
TVmax
Flow temperature setpoint maximum
Tvmin
Flow temp setpoint minimum
