6
Installation Recommendations
Preliminary design
Ventilation
A. Cross ventilation and free flow of cool, clean and
fresh air should flow from alternator end to engine.
B. Additional ventilation arrangement may be required for
radiator cooled engines installed in acoustic enclosure
because acoustic enclosure traps radiated heat,
decreasing cooling capabilities. Hence these sets may
need bigger ventilation fans. Radiator cooled engines
may create slight negative pressure inside the genset
room / enclosure. Maximum static restriction should
not increase 6-mm of water column.
C. For basement installations, supply of fresh air and
forced ventilation through air ducts is required to
remove heat.
D. Refer to table for values of air required and fan flows
for various gensets rated at 1500 rpm.
Values mentioned in table are with lagged exhaust
piping in the room and silencer fitted outside the
room.
E. Maximum allowed temperature rise above ambient in
genset enclosure is :
Max. ambient allowable temp. rise upto 40
o
C is 10
o
C
and above 40
o
C is 5
o
C
F. Adequate capacity natural ventilators can be used
for acoustic enclosure room.
Natural Ventilators
Preliminary design
G. Field Check for Proper Ventilation
1. Run the engine on full load / typical load for about 1
hour so that temperature in the enclosure gets
stabilized.
2. Measure the ambient air temperature (ambient
temperature should be measured outside the
enclosure in shade).
3. Measure the temperature inside the enclosure.
Enclosure temperature should be measured near air
cleaner inlet of engine.
4. Calculate temperature difference between enclosure
temperature and ambient i.e. delta T.
Sometimes to ensure proper ventilation, it may be
necessary to measure actual airflow by
anemometer.
Engine Model Rating Total Air Radiator
(0.8 pf) (Ventilation + Breathing) Fan flow
requirement for Genset in
Max. amb. Max. amb. Genset
above below room
40
0
C 40
0
C
(rise 5
0
C) (rise 10
0
C)
kVA lt./sec lt./sec lt./sec
QSK60 - G4 2000 41915 22090 32285
QSK60 - G3 1875 38525 20310 32285
KTA50 - G8 - I 1500 34955 18275 28400
KTA50 - G3 1250 31475 16420 27375
KTA38 - G5 1000 26980 14050 23855
KT38 - G2 - I (2300) 750 21795 11395 22655
VTA28 - G5 625 17770 9270 22655
VTA28 - G3 600 17405 9060 18880
KTA19 - G4 500 14410 7480 20280
KTA19 - G3 450 13110 6800 13000
KTA1150 - G 380 12070 6255 10385
NTA14 - G3 380 11110 5750 10385
NTA855 - G2 BC 320 9385 4855 10070
NT855 - G6 BC 285 8975 4650 10070
NT855 - G5 BC 250 8285 4300 10070
NT855 - G4 BC 225 7305 3795 10070
6CTAA8.3 - G1 - I 200 6245 3225 7385
6CTA8.3 - G2 - I 180 6035 3115 5540
6CTA8.3 - G1 - I 160 5565 2880 5540
6CT8.3 - G2 - I 140 4955 2555 5540
6BTA5.9 - G2 - I 125 4920 2525 4000
6BT5.9 - G2 - I 82.5 3420 1760 2880
S3.8 - G7 62.5 2450 1260 1880
S3.8 - G6 50 2090 1075 1880
S3.8 - G5 45 2090 1075 1880
S3.8 - G4 40 1715 890 1880
S3.8 - G3 35 1420 730 1880
S3.8 - G2 30 1240 640 1880
X2.5 - G2 25 1060 542 1250
X2.5 - G1 20 930 475 1250
X1.7 - G1 15 670 345 1050
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