ULTIMA FREECOOL
Chillers
Chillers
32
Installation & Maintenance Manual : 903-125 IM E 05/04/A
Commissioning Data
ELECTRICAL DATA
Capacity Control
The following staggered timings are recommended on compressor start-up:
0%
100%
70%
40%
12%
75 Sec ± 5
180 Sec ± 10
Start
•
12% load (starting position) should be used only at start-up, never as a stage of
capacity control.
•
12% load at start-up should be maintained for 70 - 80 seconds to avoid
liquid compression.
•
The first stage of capacity control (either 25 or 40% depending on compressor
size) should be maintained for at least 170 - 190 seconds before further loading.
Adding Refrigerant
Additional refrigerant should be added to the system via 1/4” schrader connection on the
expansion line.
Pump Down
Never shut the liquid injection solenoid valve during or before pump down.
Never pump down without the low pressure trip and high discharge temperature switches
being operative.
UNLOADING PROTECTION
Head Pressure
The microprocessor has inbuilt protection against nuisance trips. If the head pressure
rises above 23BarG the compressor will unload to 70% and remain unloaded until the
head pressure drops below 21BarG.
Low Pressure
If low pressure drops below the microprocessor setting, the compressor will unload to
70%, if low pressure persists for 1 minute, the circuit will be switched off and sound
an alarm.
Содержание UFC200D-8
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