Xylem Fire diesel pump D Series GEN D Series - Manual (Page 47)

47
In environments containing airborne particles, install pre-filtering systems to prevent clogging
of the radiator filters.
The fresh air needed to ensure proper air flow is delivered through openings located at the
bottom of the room and, whenever possible, in the wall opposite the radiator, so that the
fresh air flows around the entire engine before being expelled by the fan.
For safety purposes, in the case of continuously operating diesel pumps installed in an
enclosed environment, and for applications with high ambient temperatures, you should
make sure that the cooling air reaching the radiator does not exceed the admissible
temperature for the radiator. If the temperature of the air reaching the radiator needs to be
lowered, we recommend using an auxiliary extractor fan whose capacity must be calculated
using the same formula utilized for verification, adopting the maximum ΔT value that enables
proper operation of the radiator based on the values declared by the engine manufacturer.
Position the extractor fan higher up on the same wall through which the vent discharges the
hot air; the extractor must guarantee a head exceeding the vacuum created in the room by
the radiator fan.
Use the following formula for verification:
Q= Total heat input into the room, including engine radiance, expressed in [kcal/h]
Cp = Specific heat of air at constant pressure expressed in [kcal/m3 °C] , the value is obtained
from the normogram shown below.
Vr = air capacity of engine radiator fan in [m3/h]
Δ
T = Tv-Ta= difference between the temperature of the air affecting the radiator (Tv) and
the temperature of the outdoor air supplied to the room (Ta) expressed in [°C]
Q
Vr • Cp
∆T =