Data Sheet for Product

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Building Technologies Fan-coil controller for wall mounting ACR12 CE1N3578en
HVAC Products 03.10.2005
Control Sequences
W
H
Q
K
X
p
X
p
Q
H
W
K
3574D02
YKYH
Y [%]
80
50
X
dz
100
Note that if P04 = ON or 1, then the heating output YH can be used to control a radiator
heater which is external of the fan coil. In this case he fan stops in the heating se-
quence.
If the controller is set to a 4-pipe system (P09 = OFF or 0) then an external sensor (re-
turn air sensor) can be connected to the terminals B2, M. The sensor must be of the
type QAH11.1. The sensor inside the controller is disconnected automatically as soon
as an external sensor is connected.
W
H
Q
K
X
p
EX
p
Q
H
W
K
3574D10
YKYHE
Y [%]
80
50
X
dz
100
W
H
Q
H
3574D09
YHE
YH
X
p
EX
p
Y [%]
100
Q
H
Heating load W
H
Heating set-point
Q
K
Cooling load W
K
Cooling set-point
X
p
P-band X
PE
P-band electric heater
Y Positioning variable
YH Heating output with 2 pipe systems and c/o on heating or with 4 pipe systems
YHE Electric heater output with REF7090521, REF7090523
YK Cooling output with 2 pipe systems and c/o on cooling or with 4 pipe systems
4-pipe fan-coil
P09 = OFF or 0
Return air sensor
2-pipe fan-coil
P09 = ON or 1
with electric heater
C/O (changeover)
set to cooling
2-pipe fan-coil
P09 = ON or 1
with electric heater
C/O (changeover)
set to heating