Data Sheet for Product

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Building Technologies QAA88.3 Room unit with PPS2 interface CE2Q1626en
HVAC Products 18-11-2005
Usage
The room unit is used in rooms controlled by an individual room control system, to mea-
sure the room temperature and for operation of the room controller. The functions of the
LCD display are determined by the controller. If manual fan-speed control is enabled,
the room unit is suitable for control of a fan-coil system.
Ordering
When ordering, please specify the quantity, product name and type code.
Example:
30 Room units QAA88.3/xxx
Note that xxx has to be replaced with the correct 3 letters defining the complete type
including special customer versions. The general version is QAA88.3/ALG.
Equipment combinations
The room unit is suitable for use in conjunction with all controllers which incorporate a
PPS2 room unit interface.
Mechanical design
The room unit is designed for surface mounting or for mounting on a recessed conduit
box.
The unit comprises a housing and base unit, connected by releasable snap-fittings.
The base unit accommodates the screw terminals.
The housing accommodates a printed circuit board, room temperature sensor element,
setpoint adjuster, key buttons for mode selection and fan speed selection.
Both the housing and the base are made of plastic.
Q1626Z1
1
2
3
4
+
5
Display of room temperature or offsets or parameters and bars for
sequence (heating or cooling) and operating mode and fan speed
Key buttons for room temperature setpoint adjustment
Symbols for operating mode and fan speed
Key buttons for mode and fan speed selection
Symbols for control sequence (cooling, heating)
The actual functions of the operator controls and indicators are determined by the con-
troller (based on the selected application and associated parameters).
Operator controls
and indication
Note