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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the EXP settings
18.10.2002
When there are 2 storage tanks, the heat will be drawn from the buffer storage tank.
When there are 2 heat exchangers in the storage tank, the heat will be delivered by the
storage tank at the bottom.
5.22 Maximum storage tank charging time
•
Charging time of the storage tank with no priority can be defined
Defines the period of time during which the storage tank with no priority is charged by
the solar collector if the switch-on criteria for charging the priority storage tank are not
met.
To better understand this function, we would recommend you to first read the descrip-
tion “Priority with 2 storage tanks” on operating line 333
.
Setting range
Unit
Factory setting
1..60 min
20
When using 2 storage tanks (buffer and d.h.w. storage tank / or combi storage tank), it
can be selected which of the storage tanks shall be charged by the solar collector with
priority (refer to operating line 333). Function “Maximum storage tank charging time” is
active only if “Relative priority” (setting 2 or 4) was selected.
During that period of time, the storage tank with no priority will be charged if the switch-
on criteria for charging the priority storage tank are not met.
When the adjusted period of time has elapsed, the controller will switch the collector
pump off (refer to “Maximum waiting time”, operating line 305
EXP
) and checks whether
the collector with no load reaches a temperature that meets the switch-on criteria for
charging the priority storage tank and starts charging it, if required.
If the switch-on criteria are not met, the storage tank with no priority will be charged
again during the adjusted period of time. The process repeats itself until either the
switch-on criteria of the priority storage tank are met or the storage tank with no priority
is completely charged.
Notes
Benefit
Description
Note
Setting
Effect
