Carel MasterAria, User Manual

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28
ENG
MasterAria +030220481 - rel. 1.0 - 12.11.2007
P06
OFF
ON
set point
V
TA (°C)
Fig. 4.m.a
Key:
V valve
TA room temperature (control probe)
Par Description Def1 Def2 Def3 Min Max UOM
06 Thermostat hysteresis 5 5 5 0 255 °C/10
A heater can be used (with dip 5= ON) to improve the heating function
and establish a diff erent hysteresis depending on whether or not the
heat enable function is operating. To avoid possible overheating, the fan
is started at the same time as the heater, and remains on for a time equal
to P48 after the heater is shutdown. As extra protection, the heater is
deactivated if the coil temperature exceeds the value of parameter P47.
Case 1: heat enable active (no hot water)
ON
OFF
TA (°C)
V
R
P06
P13
set point
ON
OFF
R
TA (°C)
Fig. 4.m.b
Case 2: heat enable not active (hot water available)
set point
ON
OFF
TA (°C)
V
P06
P46
P13
ON
OFF
( )
R
TA (°C)
P46
Fig. 4.m.c
Key
R heater
TA room temperature (control probe)
V valve
Par Description Def1 Def2 Def3 Min Max U.M
13 - Hysteresis to enable fan
in heat/heat
AUTOMATIC, cool, cool
AUTOMATIC
- Heater hysteresis
(P39=6) 10 10 10 0 255 °C/10
46 Heater band hysteresis
(see P39=6) 30 30 30 0 255 °C/10
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.10
Below is an example of the activation sequence of the MasterAria loads
in heating mode; the AHU is fi tted with a hot/cold water valve or hot
water valve only and is operating in heating mode with the fan speed
established by autofan.
min.
ON
OFF
OFF
P10+P13
P11+P13
P12+P13
set point
med.
TA
TB
V
FAN
1 2 3 4 5 6 7
t
t
t
t
Fig. 4.m.d
Key
TA room temperature (probe B1)
TB coil temperature (heat enable)
V valve
FAN fan
1. mode changed by user
2. extra fl ush cycle
3. select speed by autofan
4. activate ventilation by heat enable & change speed
5. change speed by autofan
6. deactivate valve & fan when set point reached
7. fl ush cycle
t time
Below is a further example of a unit fi tted with hot/cold water valve or hot
water valve only and heater; it is operating in heating mode with the fan
speed established by autofan.
min.
OFF
OFF
OFF
ON
P10+P13
P11+P13
(heat
enable)
P12+P13
Set-P13
Set-P46
set point
med.
ON
TB
TA
V
R
FAN
t
t
t
t
t
1 2 3 4 5 6 7 8
Fig. 4.m.e
Key
TA room temperature (probe B1)
TB coil temperature (heat enable)
V valve
R heater
FAN fan
1. mode changed by user
2. extra fl ush cycle
3. activate valve & heater after extra fl ush
4. deactivate heater when thresh. exceeded w/ heat enable not active
5. speed by autofan
6. deactivate valve when set point reached
7. extra fl ush heater
8. fl ush cycle
t time