Download Table of Contents Print this page

Ventilation Of Air Compressor Room - Hitachi NEXT Series Instruction Manual

Oil-free rotary screw air compressor
Hide thumbs Also See for NEXT Series:

Advertisement

Table of Contents

5.5 Ventilation of Air Compressor Room

5.5.1 Air-Cooled model
CAUTION
Provide a ventilating system to the air
compressor room in the event that the room
temperature exceeds the allowable ambient
operating temperature of 104°F (40°C).
Operating the air compressor at an ambient
operating temperature above 104°F (40°C) may
cause a serious problem.
IMPORTANT
● Stop the ventilating fan when the air compressor has
stopped.
● The ventilating fan should be running while the air
compressor is operating. If the ventilating fan is not
running, the loss of air flow may reduce the performance
of the cooler.
● The duct should be detachable for ease of maintenance
on the air compressor.
Technical Data for Room Ventilation
Model
DSP-
Item/Unit
90A6N
KBTU
Heat Generation
(MJ/h)
(430)
cfm
8,830
Air Exhaust
(m
/min)
(250)
3
°F
Approximate Temperature
Rise (exhausted air)
(℃)
inchAq
Allowable Pressure Loss
(exhaust duct)
(Pa)
cfm
40,260
Recommended
Ventilating Fan ①
(m
/min) (1,140)
3
cfm
9,890
Recommended
Ventilating Fan ②
(m
/min)
(280)
3
air exhaust
(air compressor)
Ventilating fan
See "Recommended
fan capacity ①" in
Air intake
the table.
opening
Fig. A
5. INSTALLING AND PIPING [Ventilation of Air Compressor Room]
Air-Cooled
DSP-
DSP-
DSP-
110A6N
90VA6N
100VA6N
408
472
417
484
(498)
(440)
(510)
9,535
(270)
47
50
45
50
(26)
(28)
(25)
(28)
0.08
(20)
46,620
41,320
47,680
(1,320)
(1,170)
(1,350)
10,600
(300)
Exhaust
Exhaust air
Duct
Air intake
opening
① Air intake opening
Provide the air compressor room with an enough air
intake opening that:
 - is positioned as low as possible on the wall.
 - is located in an environment free of external dust
and harmful material.
② Ventilation without Duct (Fig. A)
For ventilation without an exhaust duct, install a
ventilating fan with the specified capacity shown in
the Recommended Ventilation Fan ① or more
row in the left table. The specified capacity is based
on the allowable room temperature rise of 9°F (5℃).
Position of the ventilating fan is as high as possible
on the wall.
③ Ventilation with Duct and without Ventilating
Fan (Fig. B)
● For ventilation with an exhaust duct, calculate the
duct's pressure loss based on information shown in
the Air Exhaust (Air Compressor) row in the table.
If the calculated pressure loss is less than 0.08
inchAq (20 Pa), a ventilating fan is not required on
the duct. Install the duct with its detachable end
directly in contact with the grilled air exhaust on top
of the air compressor.
● If the calculated duct's pressure loss is 0.08 inchAq
(20 Pa) or larger, a ventilating fan is required on the
duct. Install the duct, keeping a gap "h" of 8 to 12
inches (200 to 300 mm) between the duct and the
grilled air exhaust on top of the air compressor. On
the other end of the duct, install a ventilating fan with
the specified capacity shown in the Recommended
Ventilation Fan ② or more in the left table. (Fig. C)
●  Pay attention to the duct opening location. Noise
may be transmitted to outside through the duct.
Provide the noise absorbing material inside the duct
if required.
Exhaust air
Ventilating fan
See "Recommended
fan capacity ③" in the
table.
Shall be
removable.
Fig. B
Exhaust air
Exhaust
Duct
Ventilating fan
See "Recommended
fan capacity ②" in
Air intake
the table.
opening
Fig. C
45

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents