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Building Technologies Modular Heating Controller RMH760B CE1P3133en
HVAC Products 10 DHW heating 05.02.2007
The setpoint currently active for storage tank charging appears on the Main menu and
on the info page.
Main menu > DHW > Inputs/setpoints
Operating line Range Factory setting
Storage tank temp setpoint 5…140 °C
For detailed information about the generation of the storage tank temperature setpoint,
refer to subsection
10.4.1 “Charging control via the storage tank temperature”.
10.4 Storage tank charging
Storage tank charging (DHW 0…DHW 5) and thus primary control (refer to section 10.7
“
Primary control“) can be started and / or terminated via different functions:
• Storage tank temperature (according to the current operating mode)
• Maximum charging time
• Forced charging
The following settings enable the functions to be activated or matched to specific
needs:
Main menu > Settings > DHW > DHW
Operating line Range Factory setting
Switching differential
1…20 K 5 K
Setback DHW setpoint bottom
0…20 K 5 K
Charging time max
---- / 5…250 min ----
Forced charging Never /
With 1st change to normal /
With every change to
normal
Never
10.4.1 Charging control via the storage tank temperature
Normally, storage tank charging is controlled via the storage tank temperature.
Charging is started as soon as the storage tank temperature drops below the switch-on
point; it ends when the storage tank temperature setpoint (TStTaSetpt) is reached.
Charging can also be activated via forced charging and aborted when the maximum
charging time is reached (refer to subsections
10.4.2 “Forced charging” and 10.4.3
“
Maximum charging time”).
If there is no storage tank sensor at the bottom, charging control is effected via
one
sensor only.
To start storage tank charging, the storage tank temperature must have dropped below
the storage tank temperature setpoint (TStTaSetpt) by the amount of the (adjustable)
switching differential (SDDhw).
Charging is ended as soon as the storage tank temperature has reached the setpoint.
TStTa
3133D05
ON
OFF
SDDhw
T
OFF
=
TStTaSetpt
T
ON
T
TStTaTop
Inputs / setpoints
(display)
Settings
⇒
Storage tank sensor at
the top
Starting storage tank
charging
Ending storage tank
charging
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