Uniflair UST500, Инструкция по эксплуатации

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UST500 CONTROL BOARD
40 06MC0074@00B0100
14/04/2010
Automatic changeover
The automatic changeover function can be enabled in parameter St01.
Heat or cool mode are activated via two different differentials that can be set in the relative parameter (Pa St03 for the heat mode and Pa St04
for the cool mode); in the neutral zone (between the two setpoints), the mode can be set from a key as well (if enabled) See the graph below for
more details; in the example, the differentials are both positive but can also be set with a negative value.
Example of automatic changeover based on external air temperature
MODE Operating mode
EXT TEMP. External temperature
COOL
SETPOINT tr04 - Temperature controller setpoint in Cool
HEAT
SETPOINT tr05 - Temperature controller setpoint in Heat
St03 Differential for automatic mode change in Heat
St04 Differential for automatic mode change in Cool
N.B.: St04 is added to COOL setpoint; St03 is added to HEAT setpoint.
N.B.: St03+St04 < HEAT setpoint - COOL setpoint, or the sum of differentials must never be more than HEAT setpoint - COOL setpoint
COOL
HEAT
ON
St04
St03
Set COOL Set HEAT
Ext Temp.
MODE