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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.152
Δ
T Differential between buffer storage tank
temperature and heat demand from the
heating circuit
•
Adjustable temperature differential for heat generation lock
If the temperature differential between buffer storage tank and heat demand from the
heating circuit is sufficiently large, the amount of heat required by the heating circuit will
be drawn from the buffer storage tank. The controllable heat sources will be locked.
Setting range
Unit
Factory setting
-20...20 K
-2
If the temperature differential (
Δ
T) for the supply of heat from the buffer storage tank to
the heating circuits is sufficient, the heat sources will be locked. As soon as the tem-
perature differential becomes too small, the heat sources will be released to generate
the extra heat required.
Released
The heat sources will be released when:
Buffer storage tank temperature
<
heat demand from the heating ci
Δ
T
Locked
The heat sources will be locked when:
Buffer storage tank temperature
>
heat demand from the heating ci
Δ
T + 2 K
The standard setting of –2 K partly compensates the boost of the heat demand from the
heating circuits.
The parameter is active only if, on operating line 473, the heat generation lock is acti-
vated.
4.153 Forced buffer storage tank charging with
heat pump
•
Use of low-tariff for storage tank charging
To save electricity costs, the heat pump will be allowed to run at low-tariff times until the
required setpoint at the selected buffer storage tank temperature sensor is reached.
Setting range
Unit
Factory setting
--- / 0...4
–
0
Entry:
0 None
No forced charging of the buffer storage tank.
1
Slave pointer / B4
Forced charging takes place until, at buffer storage tank sensor B4, the value
of the slave pointer is reached (see chapter 6, “Functions with no setting”).
Benefit
Description
Setting
Effect
Note
Benefit
Description
Setting
Effect
