Two String Central Cooling Water System - Man L23/30DF Project Manual

MAN Diesel & Turbo
1699122-4.1
Page 1 (2)

Two string central cooling water system

Figure 1: Central cooling water system.
System design
The cooling water system consists of a two string
cooling water system: a low temperature system
(LT) and a high temperature system (HT).
B 13 00 0 "Internal cooling water system".
Each engine has its own cooling water system with
radiator cooler. The radiator cooler has separate
stages for LT and HT cooling water.
The HT cooling water is used for the cooling of 1.
stage air cooler, cylinder jackets and cylinder heads
and is circulated by the engine built on HT pump.
2018.02.22
Two string central cooling water system
V28/32S, L28/32S, L23/30S, L21/31S, L16/24S, L27/38S
See also
The LT cooling water is used for the cooling of 2.
stage charge air cooler and lubricating oil and is cir-
culated by the engine built on LT pump.
Preheating
Engines in stand-by position must be preheated.
The preheating shall be adjusted to a temperature
of min. 60°C at the cylinder heads.
Expansion tank and aeration of air
To prevent air accumulation in the HT cooling water
system, air venting tank(s) with automatic aerating
valve(s) is connected to the top of the engine(s).
B 13 00 6