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Benefit
Caution
Description
Setting
Effect
Frost protection for the
building
Diagram
Benefit
Description
Setting
Effect
Notes
Siemens Building Technologies
HVAC Products
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
4...TRRw
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
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
8...30.0
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
• During summer operation, the display shows ECO
Basic Documentation RVP540 / RVP550
Description of the enduser settings
Unit
°C
Unit
°C
and standby mode
Factory setting
10
will be main-
Factory setting
17
71/348
CE1P2488en
18.10.2002
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