Fig. No.
23
18
of
46
Subject to change without prior notice
INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS
FIRE PUMPS - NF-VTP SERIES
Ref. No. NFVTP-IOM/
2016
/V.
02
Radiator cooled engines employ a fan to draw air through the radiator thus directly cooling the closed engine circuit.
The pump house must have inlet and outlet vents of suitable size to provide adequate air without re-circulation.
Heat exchanger, closed engine circuits, are cooled by a supply of coolant from the pump outlet. This supply is passed
through the heat exchanger and is then pipe to waste. (See Fig. No.
23).
A flow control system is fitted to prevent
continuous flow of water to waste under standstill conditions.
Engine cooling line – bypass line:
Ensure that the following components are installed in the engine cooling line.
1
. Drain plug
2
. Ball valves
3
. Strainer
4
. Pressure reducing valves
5
. Solenoid valve
6
. Pressure gauge
7
. Bypass line
In emergency conditions, when cooling water is not flowing or engine temperature is too high, open both manual
