75
Slope adjustment in cooling mode
The related parameters are as follows:
P121: Cooling setpoint 1
P122: Cooling setpoint 2
P128: Outdoor temperature at start of drift in cooling mode
P129: Outdoor temperature at end of drift in cooling mode
P130: Maximum setpoint at end of drift in cooling mode
Slope adjustment in heating mode
The related parameters are as follows:
P123: heating setpoint 1
P124: heating setpoint 2
P132: Outdoor temperature at start of drift in heating mode
P133: Outdoor temperature at end of drift in heating mode
P134: Maximum setpoint at end of drift in heating mode
16.7 Automated self-regulating control
If the compressor runtime drops below 3 minutes, the stage differential is increased by 1.0 K for control on the return line (maximum value of 7.0 K).
For control on the supply line, the calculated difference is changed by 1.0 K in order to delay the starting of the compressor. The maximum
shift value is 7.0 K for the first stage and 6.5 K for the following stages.
The following message appears:
If the compressor runtime rises above 5 minutes and the automated self-regulating control is on, the stage differential for the control on the
return line is lowered by 1.0 K until the initial values are reached.
For control on the supply line, the calculated difference by 1.0 K is changed in order to hasten the starting of the compressor until the initial
values are reached.
The function is disabled if the initial values are reached, if the unit is turned off (via On/Off button on console or automatic operation control on
with winter water loop protection off), if a unit fault occurs, if parameter P141 (control mode) is changed and if a power failure occurs.
16.8 Control with A
EROCONNECT
link in
FREE COOLING
mode
The thermodynamic unit can control only the cooling return line
because the
FREE COOLING
module driven by A
EROCONNECT
adjusts the
cooling capacity using its own return line sensor and by retrieving the setpoint set by C
ONNECT
.
17 CONTROL OF CONDENSING PRESSURE FOR AIR-COOLED UNITS
17.1 Control during normal operation or on/off control
In heating mode:
All the fan stages are turned on at maximum speed:
- Once a compressor stage is running on the unit when P11 = intertwined
- Once a compressor stage is running on the circuit when P11 = split.
In cooling mode:
- Control mode is turned on as soon as a compressor stage is running on the circuit.
A) On/Off, where P21 (variable speed control) = No, P10 = Propeller and P11 = Split
The fans turn on once the compressor on the corresponding circuit starts up.
P180 = 2 or 3 corresponds to 2 or 3 fan stages per circuit.
- Fan 1 on circuit 1 will be controlled by stage
1, motherboard terminal block J3 (terminal 5)
- Fan 2 on circuit 1 will be controlled by
stage 2, motherboard terminal block J3
(terminal 6)
- Fan 1 on circuit 2 will be controlled by
stage 1 on circuit 2, ADD 2 board terminal
block J3 (terminal 5)
- Fan 2 on circuit 2 will be controlled by stage
2 on circuit 2, ADD 2 board terminal block J3
(terminal 6)
1er = stage 1, 2ème = stage 2,
1 condenser fan module per circuit = 2 single-phase stages
DEE = Interstage differential
S E L F - R E G U L A T I N G
C O N T R O L M O D E
P251 setpoint
Temp
.
ext.
P251 setpoint
Temp
.
ext.
P251 setpoint
Temp
.
ext.
P121
or
P122
P121
or
P122
P123
or
P124
Содержание Magister 2 Series
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