Carel MasterAria, Руководство пользователя

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23
ENG
MasterAria +030220481 - rel. 1.0 - 12.11.2007
4.2 Control algorithms
In summary
general functions: Heat enable, Cool enable, Flush, Extra Flush, P+I
•
temperature control, Freecooling, Freeheating, outlet limit control, fan
management, Autofan or continuous fan operation.
manual operation: cooling, heating (optional heater management),
•
dehumidifi cation, ventilation;
automatic operation: heating (optional heater management) and
•
cooling;
set point compensation using outside probe;
•
On/Off timer (1 time band) and “sleep” function;
•
control of ON/OFF or modulating actuators.
•
Below is a description of the operation of MasterAria, divided into general
functions, manual and automatic functions.
Heat enable (heating/AUTOMATIC heating)
(parameters 10,11,12,13)
In order to avoid undesired fl ows of cold air, the fan is only operated if
the temperature of the main coil (e.g. probe B2) is high enough. If this
condition is not satisfi ed the heating symbol (sun) fl ashes.
DIPSWITCH1 must be set to ON. The fan speed allowed (limiting the
request by the control algorithm) is described in the following graph.
P13
TB (°C)
OFF
min.
medium
max.
FAN
P10 P11 P12
P13
P13
Fig. 4.e
Key
FAN fan speed
TB heating coil temperature
When reaching the set point, the hot/cold water or hot water valve only
is closed and the fan is stopped.
Par. Description Def1 Def2 Def3 Min Max UOM
P10 Temperature to enable minimum fan speed in heating/AUTOMATIC heating 29 29 29 0 255 °C
P11 Temperature to enable medium fan speed in heating/ AUTOMATIC heating 33 33 33 0 255 °C
P12 Temperature to enable maximum fan speed in heating/AUTOMATIC heating 37 37 37 0 255 °C
P13 -Hysteresis to enable fan in heating/AUTOMATIC heating, cooling, AUTOMATIC cooling
-Heater hysteresis (P39=6) 10 10 10 0 255 °C/10
P55 Enable cooling & heating symbols in AUTOMATIC
0= symbols off
1= symbols on when called 0 0 0 0 1 ---
Tab. 4.h.1
Important:
Cool enable (cooling/AUTOMATIC cooling,
dehumidifi cation)
(parameters 13,14)
In order to avoid undesired fl ows of hot air, the fan is operated only if the
temperature of the coil is low enough. If this condition is not satisfi ed the
cooling symbol (snowfl ake) fl ashes. DIPSWITCH1 must be set to ON. The
fan speed is managed by the control algorithms or set manually.
TB (°C)
OFF
ON
FAN
P14
P13
Fig. 4.f
Key
FAN fan
TB cooling coil temperature
The heat enable function must be disabled if modulating actuators are used (0 to 10 Vdc or 3-point).
When reaching the set point, the hot/cold water or cold water valve only
is closed and the fan is stopped.
Par. Description Def1 Def2 Def3 Min Max UOM
13 - Hysteresis to enable fan in heating/AUTOMATIC heating, cooling, AUTOMATIC cooling
- Heater hysteresis (P39=6) 10 10 10 0 255 °C/10
14 Temperature to enable fan in cooling/ AUTOMATIC cooling e dehumidifi cation 21 21 21 0 255 °C
55 Enable cooling & heating symbols in AUTOMATIC
0= symbols off
1= symbols on when called 0 0 0 0 1 ---
Tab. 4.h.2
Important: The cool enable function must be disabled if modulating actuators are used (0 to 10 Vdc or 3-point).