Maintenance and Care
80
Carefully read these Operating Instructions before starting any work!
This is especially valid for the chapter on General Safety Instructions
and the safety instructions in each of the chapters.
Topping up/bleeding the coolant
WARNING
Risk of injury due to hot fluid
Coolant gets hot during operation and causes scalding if touched.
For this reason:
S Observe the safety instruction of the manufacturer of the combined heat and power plant.
WARNING
Risk of damage due to excessive temperature difference
Engine damage
For this reason:
S Do not fill with cold coolant.
S Allow the engine to cool down.
ENVIRONMENTAL NOTE
Risk of injury due to hot fluid
Serious environmental damage can result.
For this reason:
S Follow the safety instructions.
S Take suitable measures immediatelyif environmentally hazardous fuels, lubricants or coolants escape
into the environment.
S Inform the relevant local authorities of the damage.
Fill the cooling system of the engine with a mixture of tap water and ethylene glycol antifreeze agent or an
ticorrosion agent.
For suitable antifreeze agents see approved Fuels, Lubricants and Coolants according to MAN 324 NF and
MAN 248.
Coolant may only be filled at the filler neck.
1. Remove cap.
2. Slowly fill coolant.
3. Close expansion tank.
4. Run engine for approx. 15 minutes at rated speed.
5. Shut off engine and carefully unscrew cap with safety valve to the first stop to release pressure, then
carefully open. Add coolant if necessary.
6. When adding coolant, do not add cold coolant to a warmed-up engine. Ensure that the proper mixing
ratio of “water/antifreeze" is met.
7. Check coolant before the next commissioning (with engine cold). Add coolant if necessary.
8. Repeat this procedure until coolant can no longer be added.
Cooling system with membrane expansion reservoir
1. After filling the cooling system, run electric coolant pump for approx. 15 minutes and then vent cooling
system.
2. Observe cooling system pressure and check coolant level.
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