43
Dynaset Oy | Menotie 3, FI-33470 Ylöjärvi, Finland | tel: +358 3 3488 200 | info@dynaset.com | www.dynaset.com
HYDRAULIC SCREW COMPRESSORS
OPERATION
5.5. OFF-LOAD MODE
When the compressed air supply line is closed and preset air pressure in the supply
line is reached, compressor automatically starts to run at off-load mode.
The off-load mode air pressure is set to 10 bar as factory default.
In off-load mode pneumatically controlled intake valve is closed and compressor’s
internal pressure drops to 5.5 bar. Pressure in the supply line remains until supply
line is opened.
When the compressed air is consumed, off-load automatic controls the intake
valve according to the current air demand.
5.6. COLD STARTS
When starting the compressor in cold conditions (ambient temperature < +5 °C)
the compressor oil viscosity is high and internal lubrication might be insufficient.
It is recommended to close the compressor’s air supply line and let the compressor
run few minutes at off-load mode.
Oil circulation is proper when gray air-oil-mixiture mist can be seen on the oil
return line sight glass.
Picture 39: Oil return sight glass
NOTE!
When starting HKR compressor in cold ambient temperatures; It’s
recommended that compressor air supply line is closed and let compressor
run few minutes at off-load mode to make oil temperature raise.
Summary of Contents for HKR 1300
Page 2: ......
Page 75: ...DYNASET OY all rights reserved...
