Uniflair UST500, Инструкция по эксплуатации

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UST500 CONTROL BOARD
64 06MC0074@00B0100
14/04/2010
Power limitation (folder PAr/PL)
Power limitation parameters can be viewed and set in folder PL (see User Interface and Parameters chapters).
Operating modes
The power limitation function:
•
protects the machine from high and low temperature situations when used with the temperature control probe;
•
protects the machine from high pressure situations, when used with the high pressure probe;
•
protects the machine from low pressure situations, when used with the low pressure probe;
•
prevents the machine from running at a low efficiency level, when used with the external temperature.
The function is always active in any machine operating state, i.e. cooling, heating and standby.
The power limitation function is enabled in parameter (PL00 - Enable power limitation function = 1)
See
diagram
Parameter
Description
Mode
Parameter description
COOL HEAT
A PL02
Setpoint
High pressure
For power
limitation
High Pressure SETPOINT
x x
B PL03 Low pressure
Low Pressure SETPOINT
x x
C PL04
High water
temperature
Low H20 temp. SETPOINT x x
D PL05
Low water
temperature
Low H20 temp. SETPOINT x x
E PL06
External
temperature
For power
limitation in
COOL
Ext. temp SETPOINT COOL x //
F PL07
External
temperature For power
limitation in HEAT
Ext. temp SETPOINT HEAT // x
A…F PL08
Proportional
band
Power limitation // //
Power limitation – 2 compressors
Diagrams A…F show the inhibition/enabling of two steps (twin-compressor machine or partialized compressor);
The pressure or temperature interval between inhibition/enabling of one step and the other depends on the proportional band and the number of
resources present in the circuit.
The switching on/off of steps respects the operating logic set.
Power limitation – by high pressure probe (Cool and Heat)
Diagram A
by high pressure probe (Cool and Heat)
PL02 High Pressure SETPOINT
Parameter Description Value
0 1 2 3
PL00
Enable power limitation function
Power limitation
disabled
Power limitation
enabled
// //
PL01 Select probe for power limitation
Internal exchanger
water/air outlet
temperature
High pressure Low pressure
External
temperature
PL08
Power
AI HIGH PRESSURE
Step 2
Step 1
SET POINT
High Pressure