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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the enduser settings
18.10.2002
3.18 Frost protection setpoint of the room
temperature (TRFw)
•
Protects the building against frost
This function is ensured only when the heating plant operates properly!
This function prevents the room temperature from falling below the adjusted frost pro-
tection setpoint.
Setting range
Unit
Factory setting
4...TRRw °C
10
TRRw Reduced room temperature setpoint (setting on operating line 27)
This setting will change the frost protection setpoint of the room temperature.
In operating mode , the room temperature is prevented from falling below a certain
level. This means that the room temperature frost protection setpoint will be main-
tained.
(Refer to operating line 27).
3.19 Summer / winter changeover temperature of
the heating circuit
•
Fully automatic operation throughout the year
•
The heating will not be switched on when the outside temperature drops for short
periods of time
•
Additional
savings
function
The summer / winter changeover temperature is the criterion for automatic summer /
winter changeover of the heating plant.
Setting range
Unit
Factory setting
8...30.0 °C
17
By changing the setting, the respective periods of time will be shortened or extended.
The change will only have an impact on space heating.
Entry:
Increase:
Winter operation will start
earlier
Summer operation will start
later
.
Decrease:
Winter operation will start
later
Summer operation will start
earlier
•
The summer / winter changeover temperature can act either locally or on other de-
vices in the system (also refer to section "Effect of summer / winter changeover
temperature") (Also refer to "Effect of automatic summer / winter changeover" on
operating line 856)
•
This function only acts in automatic mode
and standby mode
•
During summer operation, the display shows ECO
Benefit
Caution
Description
Setting
Effect
Frost protection for the
building
Diagram
Benefit
Description
Setting
Effect
Notes