➤ Follow coolant recommendations in chapter 2.6.3.
Preparing coolant
Precondition Coolant must meet the specification of ASTM D4985.
➤ The coolant should be mixed in the proportions given by the manufacturer.
KAESER coolant mixture table
Antifreeze
Water
Frost protection to [°C]
1 part
2 parts
−20
1 part
1.5 parts
−27
1 part
1 part
−37
Tab. 83 KAESER coolant mixture table
The concentration of antifreeze should not be less than 33% for ensured corrosion protection.
10.4.1.4 Filling and topping up the coolant
The proportion of antifreeze in the coolant should not fall below 33% to ensure frost and corrosion
protection and prevent the build up of deposits in the cooling circuit. Topping up with water alone
dilutes the antifreeze concentration and is forbidden.
Make sure that there is sufficient room for hot coolant to expand without overflowing.
Precondition The «battery isolating switch» is off.
1. Twist and remove the expansion tank filler cap.
2. Mix a quantity of coolant according to the table and top up to the mark.
Top up until the coolant level is just below the maximum mark
A
3. Screw on the filler cap.
4. Activate the «battery isolating switch».
5. Close the door.
6. Start the engine and allow to IDLE for about 1 minute.
7. Stop the engine.
8. Open the right-hand access door.
9. Check the coolant level.
If the coolant level in the expansion tank has decreased: Replenish the coolant.
10. Visually inspect for leaks.
11. Close the door.
10.4.1.5 Draining the coolant
The complete volume of coolant contained in the circuit can be drained from the radiator. This is done
from a drain valve with the aid of a separate drain hose.
Precondition Machine cooled down.
The «battery isolating switch» is off.
10 Maintenance
10.4 Engine
No.: 9_9425 01 E
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
105
