Data Sheet for Product

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Siem ens Room unit QAW70 CE2N1637E
Building Technologies 2014-07-30
The heating program is provided by a 7-day time switch. Each day may have a maxi-
mum of 3 heating periods whereby each weekday can be individually programmed. The
heating program of the current weekday appears on the display in graphic form.
When the holiday period starts, the duration in days can be entered. During the holiday
period, the room temperature is maintained at the standby level, ensuring protection
against frost. If active, the holiday function is shown on the display.
The temperature setpoints, the heating program and the holiday function can be reset
to their default values at any time.
For heating controllers that operate 2 room units via their PPS interface, the device
address can be set on the QAW70.
On the service level, an operating lock can be activated. When activated, it is no longer
possible to change operating lines.
The QAW70 can also be used with an external temperature sensor. The authority of
that sensor can be set to between 0 and 100 %.
The use of an external switch allows changeover of the operating mode by some other
device (e.g. a telephone switch). On the QAW70, it is possible to select whether the
reduced room temperature or the frost / holiday mode temperature shall be maintained
when the switch has closed its contact. With analog heating controllers only frost / holi-
day mode temperature is possible. The operating action of the switch can also be se-
lected.
It is possible to select whether display of the setpoint shall be absolute or relative.
Notes
· All connection terminals carry extra low voltage
· The local regulations for electrical installations must be complied with
· Sensor cables should not be run parallel to mains cables
· The room unit should be installed in the main living room
· If the control system uses room temperature influence, the room unit should be in-
stalled in a room that is representative of the entire house (reference room). If that
room is equipped with thermostatic radiator valves, they must be set to their fully
open position
· The mounting location should be such that the room unit can sense the room tem-
perature as accurately as possible. This means that it should not be exposed to di-
rect solar radiation or to other heat or refrigeration sources
· The room unit should be fitted about 1.5 m above the floor
· The room unit can be fitted on most commercially available recessed conduit boxes
or directly on the wall
Every unit is supplied with mounting and commissioning instructions
Heating program
Holiday function
Default values
PPS interface
Operating lock
External sensor
External switch
Display of setpoint
Engineering
Commissioning