71/94
Siemens Building Technologies
Basic Documentation RVD110, RVD130
CE1P2381E
HVAC Products
20 Combination with PPS units
27.05.2004
20.3.5 Entry of holiday periods
Using the QAW70 room unit, the controller can be switched to holiday mode. To be
entered is the length of the holiday period in days. The room unit’s LCD displays the
entry as follows:
•
The last weekday of the holiday period is shown on the left (1 = Monday, 2 = Tues-
day, etc.)
•
The number of days of the holiday period is shown on the right
The holiday mode starts on the day after the entry is made.
In holiday mode, the controller responds as follows:
•
The heating circuit is switched to standby (heating to frost protection temperature if
there is a risk of frost)
•
D.h.w. heating is switched off (heating to frost protection temperature if there is a risk
of frost)
•
The holiday function is given priority over the room unit’s operating mode
During the holiday period, the operating mode buttons for space heating
and
d.h.w. heating
flash at a frequency of 2 Hz, provided the function has been acti-
vated beforehand.
20.3.6 Freely programmable input
For a number of remote operating and other auxiliary functions, the QAW70 room unit
features a freely programmable input. The following connection choices exist:
•
QAW44 analog room temperature sensor (NTC sensing element)
•
External telephone contact
•
Contact for common fault or window switch
Configuration of this input is made on operating lines 55 and 56 of the room unit.
If the external QAW44 room temperature sensor is connected to the QAW70, the latter
generates the average value of the 2 QAW temperature measurements according to
the influence set (QAW70 operating line 57), which is then transmitted to the controller
for the room temperature-dependent functions.
20.4 Room temperature sensor QAA10
The QAA10 digital room temperature sensor can be used in place of a room unit.
The QAA10 acquires the room temperature with an NTC sensing element. Its range of
use reaches from 0 to 32 °C.
