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Comfort Control Manual (Installation and Applications)
7.7 CONFIGURATION OF ROOM UNITS (RU) AND CONTROL UNITS FOR
HEATING AND CONDITIONING CIRCUITS
Introduction:
a. The room units are optional and, especially in systems with multiple services, it may
be preferable to use only climate curves to control the system:
• The delivery temperature of each heating circuit is calculated by the “heating
curve” as a function of the external temperature and the desired room setpoint.
• The “heating curve” depends on parameters 720, 1020 and 1320 “heating
curve slope” and 721, 1021 and 1321 “heating curve displacement”. These
parameters are explained in “Parameters useful for regulating the system
“Heating circuits configuration” a pagina 83 (see points 6 and 7).
• The climatic control of each service can be effected by installing room
thermostats which control the cut-off valves on the respective plumbing circuits.
b. The AVS37 controller is installed in the Comfort Control Panel (and hence is not
easily accessed by the user) and is used to modify:
• The “Comfort setpoint”. See paragraph - AVS37 controller and QAA75 or
QAA78 room unit settings using parameters 40 (“Used as”), 42 (“Assignment
device 1”), 44 (“Operation HC2”) and 46 (“Operation HCP”) - a pagina 111.
•
•
, Reduced
or Protection
)
The “Heating mode” (Automatic , Comfort
of circuits C1, C2 and CP. See paragraph - AVS37 controller and QAA75 or
QAA78 room unit settings using parameters 40 (“Used as”), 42 (“Assignment
device 1”), 44 (“Operation HC2”) and 46 (“Operation HCP”) - a pagina 111.
All configuration parameters (excluded those which are controlled exclusively
by PC).
c. Evolved room unit: QAA75 or QAA78 has the following features:
• Modifies the “Comfort setpoint”. See paragraph - AVS37 controller and QAA75
or QAA78 room unit settings using parameters 40 (“Used as”), 42 (“Assignment
device 1”), 44 (“Operation HC2”) and 46 (“Operation HCP”) - a pagina 111.
•
•
•
106
Modifies the “Heating mode” (Automatic
, Comfort
, Reduced
or
Protection
). See paragraph - AVS37 controller and QAA75 or QAA78 room
unit settings using parameters 40 (“Used as”), 42 (“Assignment device 1”),
44 (“Operation HC2”) and 46 (“Operation HCP”) - a pagina 111.
Modifies all configuration parameters (excluding those which can only be
accessed via PC and those related to heating/cooling circuits not controlled by
the room unit in question).
“Influences” the delivery temperature of circuits C1, C2 and CP:
Normally, each RU is associated with just one circuit and its purpose is
to influence, together with the heating curve, the circuit’s delivery
temperature, as a function of the temperature in the room in question.
Ed. 12/2008