On/Off Menu; General On/Off; System Menu; Selecting The System Operating Mode - AERMEC PGD1 User Manual

5

ON/OFF MENU

5.1 GENERAL ON/OFF

This window makes it possible to view the general state of the system as well as to
turn the unit on or off:
On/O Unit
Plant
O General
General enable:
Display of the general system state:
— Flow switch open: the chiller's flow switch is open;
— Enabled: the system regulates via the main probe based on the system setpoint;
— Off due to alarm: system off due to serious alarm;
— General off: system turned off by general enabling (see the paragraph de-
scribed below "General enabling");
— Off by BMS: system turned off by the supervision system;
— Off by clock: system turned off by time bands;
— Off by dig. input: system turned off by digital input (ID3 PCOE);
— Off by display: system turned off by terminal, control system screen;
— Antifreeze: unit forcibly switched on to prevent freezing;
— Off by master: system turned off by master in master/slave configuration;
— Out of operating limits: system out of machine operating limits;
— Replacement boiler: replacement boiler active;
It is possible to change the unit state in the last row. If NO is selected, the entire
system will be put in stand-by mode, if YES is selected the machine is turned on.
6

SYSTEM MENU

6.1 SELECTING THE SYSTEM OPERATING MODE

This mask is used to display the current unit state, to turn the unit on or off and to
select the operating mode:
Plant
O General
Switch On:
YES
NO
Mode Selection:
HEATING
Enable: allows to select the mode with which to turn the unit on or off; the available
options are:
— OFF: the system does not produce hot/chilled water;
— YES: the system regulates via the main probe based on the system setpoint;
— YES WITH SET2: the system regulates via the main probe based on setpoint 2;
— BY CLOCK: the system regulates only when time bands are active;
Mode selection: allows to select the operating mode used to operate the unit; the
available options are:
— COOLING: the system is in cooling mode;
— HEATING: the system is in heating mode;
— FROM OUTSIDE TEMP.: summer or winter mode is selected based on the out-
side temperature;
— FROM DIG. INPUT: if the digital contact closes, the hot mode is selected;
— BY SUPERVIS.: the BMS system controls remotely;
— BY CALENDAR: hot mode is selected by the calendar;

6.2 SETTING THE VALUES FOR THE PRIMARY SETS

This mask is used to set the values to assign to the primary working setpoints:
Plant
Setpoint 1
The primary working setpoints are:
— : setpoint 1 for cooling mode;
— : setpoint 1 for heating mode;
7.0°C
45.0°C
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