Hitachi YUTAKI M RASM-3WF2E Installation And Operation Manual page 29

On graphic below, required concentration depending on outside temperature is shown.
32(0)
23(-5)
14(-10)
5(-15)
-4(-20)
-13(-25)
-22(-30)
-31(-35)
-40(-40)
-49(-45)
-58(-50)
0 10
% Volume propylene glycol coolant
Burst point acc. to DIN51583
32(0)
23(-5)
14(-10)
5(-15)
-4(-20)
-13(-25)
-22(-30)
-31(-35)
-40(-40)
-49(-45)
-58(-50)
0 10
Burst point according to
DIN51583

NOTE
• Freezing point according to ASTM D 1177 is the temperature for the first ice crystal formation.
• The requirements of table must be always compared with glycol manufacturer specifications.
• Maximum concentration of glycol is 45%.
• If system is only prevented against bursting, pump must not be turned on (the liquid inside might
PMEN0657 rev.0 - 02/2024
Frost protection
20 30
Frost protection
Frost protection
20 30
% Volume etylene glycol coolant
Frost protection
40 50
Freezing point according to ASTM D1177
40 50
Freezing point according to ASTM D1177
60 70
5
60 70
28