Charging Temperature Level Solar Charging Strategy - Siemens RVA63.242 User Manual

Benefit
Description
Setting
Effect
Process
Siemens Building Technologies
Landis & Staefa Division
4.75 Charging temperature level solar charging
strategy
Selectable charging strategy for storage tank charging.
It is possible to select the temperature level from which the storage tank shall be
charged by the solar collector.
Setting range
- - -
20...130
Entry:
- - - Inactive
Energy-related charging strategy
20...130 Charging level:
Level-related charging strategy
4.75.1 Differential temperature control ( ∆T control)
If the solar collector generates sufficient heat, the collector will be activated to carry the
heat into the storage tank (d.h.w. or buffer storage tank).
Depending on the charging strategy selected, charging can take place either energy- or
level-related.
Energy-related
With energy-related storage tank charging, only the temperature differential (TSdEin) to
the storage tank temperature is decisive.
Switch-on point
The collector pump will be activated as soon as the following conditions are met:
−
The differential of collector and storage tank temperature has exceeded temperature
differential (TSdEin).
−
The maximum storage tank temperature is not reached.
Switch-off point
The collector pump will be deactivated as soon as at least one of the following
conditions is met:
−
The differential of collector and storage tank temperature has dropped below
temperature differential (TSdAus).
−
The storage tank temperatures at the bottom and at the top have reached the
maximum storage tank temperature.
Level-related
With level-related storage tank charging, a minimum temperature level can be present,
in addition to the temperature differential. This enables the storage tank to be charged
only from a certain collector temperature (temperature level for solar plus TSdEin).
Basic Documentation RVA63.242, RVA53.242
Description of heating engineer settings
Unit
°C (K)
Factory setting
- - -
137/218
CE1P2373E
26.03.2001