Operation and maintenance manual

DX140R/DX140LCRInspection, Maintenance and Adjustment
4-74
Antifreeze Concentration Tables
NOTE: The concentration shall be kept at 50% and in worst
case at 30% minimum for the least corrosion
resistance.
NOTE: Repla
cement cycle of the DOOSAN Genuine Product
is 2,000 hours or one year.
Table of Standards for Allowed Tap Water
PPM (Parts Per Million) - Unit of concentration of minor materials.
• 1 ppm = 1 mg/1 kg, 1 mL/1 L
° d.H - Unit of concentration of minor materials.
• 1° d.H = 17 ppm
Ethylene Glycol - DOOSAN Genuine Antifreeze
Soluti
on (for all seasons)
(2,000 Hour/1 Year)
Ambient Temperature Cooling Water Antifreeze
-20°C (-4°F) 67% 33%
-25°C (-13°F) 60% 40%
-30°C (-22°F) 56% 44%
-40°C (-40°F) 50% 50%
Requirement
Item
Inorganic
chlori
de
Sulfates
Total
Ha
rdness
Total Solids Acidity
Value < 40 ppm < 50 ppm < 9.5° d.H < 340 ppm 5.5 - 9.0
CAUTION
AVOID INJURY
The standard of tap water is for referece only, and may not
be regard
ed as a standard.
If quality of the water is not trustable, stop using tap water
when
ever possible and use distilled water.