Carel MasterAria, Руководство пользователя

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29
ENG
MasterAria +030220481 - rel. 1.0 - 12.11.2007
Dehumidifi cation
Based on the set point, fi rstly the room temperature is controlled, cooling if
necessary, followed by the actual dehumidifi cation cycle. In dehumidifi cation
mode, the hot/cold water valve or cold water valve only is always open, fan
on/off cycles are run at minimum speed. The cool enable function is active
so as to ensure that the exchanger temperature is low enough for the water
vapour to condense. When the room temperature reaches the set point, the
dehumidifi cation cycle stops, the fan is shut down and the hot/cold water
valve or cold water valve only is closed. If modulating actuators are used, the
valve is controlled by opening or closing completely.
OFF
ON
P49 P50 P49 P50 P50 P49
Fig. 4.n
Par Description Def1 Def2 Def3 Min Max UOM
49 Fan on time in
dehumidifi cation 3 3 3 0 255 min
50 Fan off time in
dehumidifi cation 15 15 15 0 255 min
Tab. 4.h.11
Ventilation
In this mode, the hot or cold water valve is always closed and the fan
operates at the speed selected by the user (in autofan, it works at medium
speed). The fan is only started if the room temperature is within the range
of temperatures specifi ed by parameters P30 and P31, to avoid undesired
fl ows of hot or cold air.
OFF
ON
P31
P30
P06 P06
TA (°C)
Fig. 4.o
Prog Description Def1 Def2 Def3 Min Max UOM
06 Thermostat hysteresis 5 5 5 0 255 °C/10
30 Fan set point (Manual &
AUTO) 15 15 15 0 255 °C
31 Fan diff erential (Manual
& AUTO) 20 20 20 0 255 °C
Tab. 4.h.12
Heater
A heater can be managed for the pre-heating, heating and post-heating
functions required by the application. If parameter 118≠2 (continuous
fan operation), the fan is started at the same time as the heater, and
remains on for a time equal to P48 after the heater shuts down. As further
protection, the heater is deactivated if the coil temperature exceeds the
value of parameter P47.
Par Description Def1 Def2 Def3 Min Max UOM
47 Max. coil temp. to
deactivate heater (see
P39=6) 40 40 40 0 255 °C
48 Extra fl ush time with
heater 20 20 20 0 255 s
Tab. 4.h.13
0 to 10 Vdc heater
See the description of P+I control for the meaning of the parameters
Par Description Def1 Def2 Def3 Min Max UOM
111 Heater activation delta 30 30 30 0 255 °C
/10
117 Heater proportional
band 0 0 0 0 255 °C
/10
Tab. 4.h.14
ON/OFF heater
Two options are available for the ON/OFF heater, each with its own
activation delta and hysteresis, depending on whether or not the P+I
algorithm is activated.
Important:
During the antifreeze alarm, only for AHUs with recirculation, the
heater is on until the temperature returns to normal values. This applies
to the modulating 0 to 10 Vdc (P39=17) or ON/OFF heater (P39=18), and
not the ON/OFF heater option P39=6.
Case 1 (P+I algorithm activated): P39=18
P111
P112
set point
ON
OFF
TA (°C)
R
Key:
R heater
TA room
temperature
(control probe)
Fig. 4.p.a
Par Description Def1 Def2 Def3 Min Max UOM
39 Confi g. output NO4
18 Output (triac or
relay) for man. of
ON/OFF heaters
(with hysteresis) on
P+I. Set parameters
P111, P112.
13 13 9 0 24 ---
40 Confi guration of output
NO5 (see P39) 14 21 10 0 24 ---
41 Confi guration of output
NO6 (see P39) 23 18 19 0 24 ---
42 Confi guration of output
NO7 (see P39) 0 24 20 0 24 ---
111 Heater activation delta 30 30 30 0 255 °C
/10
112 Heater hysteresis
(p39=18)
5 5 5 0 255 °C
/10
Tab. 4.h.15
Case 2 (P+I algorithm NOT activated): P39 =6
P46
P13
set point
ON
OFF
TA (°C)
R
Key:
R heater
TA room
temperature
(control probe)
Fig. 4.p.b