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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.232 Automatic d.h.w. push
•
Availability of d.h.w. is also ensured during non-occupancy times.
If, due to unexpected demand, the d.h.w. storage tank is emptied, the d.h.w. push pro-
vides one-time charging of the storage tank until the nominal d.h.w. temperature set-
point is reached. The automatic d.h.w. push can be activated or deactivated.
Setting range
Unit
Factory setting
0 / 1
–
0
Entry:
0
Automatic d.h.w. push is inactive
1
Automatic d.h.w. push is active
The d.h.w. push is triggered as soon as the actual d.h.w. temperature falls below the
reduced d.h.w. setpoint (operating line 770) by an amount exceeding twice the switch-
ing differential (operating line 751
EXP
).
TBWx < TBWR - 2 SDBW
When the d.h.w. push is triggered, the storage tank is charged once until the nominal
d.h.w. temperature setpoint (operating line 26) is reached.
Then, normal operation according to the d.h.w. heating program is resumed.
t
2379
D10
TBWw
TBWR
TBWw
TBWR
2
·
SDBW
SDBW
SDBW
Push
TBWx
SDBW
D.h.w. switching differential (operating line 751
EXP
)
TBWw
Nominal d.h.w. temperature setpoint (operating line 26)
TBWR
Reduced d.h.w. temperature setpoint (operating line 770)
Benefit
Description
Setting
Effect
Process
Example
