Data Sheet for Product

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Building Technologies QAA88.3 – Room unit with PPS2 interface CE2Q1626en
HVAC Products 18-11-2005
In normal operation, the following examples may be displayed (depending on the con-
troller configuration). For details of these functions, refer to the application description
of the relevant controller range.
Display element
(examples) Description
Room temperature in °C (resolution 0.5 °C)
Room temperature in °F (resolution 1.0 °F)
Digital display of setpoint adjustment
(displayed only while relative adjustment is in progress).
Digital display and scale
(displayed only while absolute adjustment is in progress)
Controlling sequence "cooling" active
Controlling sequence "heating"
If no bar is shown, the controller is in the neutral zone
between heating and cooling.
Operating mode is standby
Fan speeds are automatically controlled
Operating mode is Comfort
Fan speeds are automatically controlled
Operating mode is Comfort"
Fan speed 1 active, manually selected
Disposal
The room unit includes electrical and electronic components and must not be
disposed of as domestic waste.
Current local legislation must be observed.
Engineering notes
The QAA88.3 receives its power from the connected controller via the PPS2 interface
(low voltage). Only one room unit may be connected to any one controller.
A twisted-pair cable is required for the connection to the controller.
Screening is not required.
LCD display