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The compressed air supply must be delivered into the distribution system at a temperature not exceeding 15
°
F above the ambient level in order to protect other devices (e.g., filters, dryers, tools, etc) against damage. At
100 psi of discharge pressure, the air core allows the flow of 57 cfm with 0.3 psid pressure loss.
AIR-COOLED HEAT EXCHANGERS
– Air-cooled cores (radiator-type) are provided as standard feature. An
axial fan, located below the heat exchangers, pumps the required amount of cooling air and expels it through an
opening on the enclosure roof. The fan is driven by a close-coupled, IP54-protected, electric motor. A full-voltage
starter energizes the fan motor.
Refer to Figure 6-1 for estimates of ventilation requirements. Please note that the air-cooled package requires
the combined total of the heat exchanger plus the enclosure ventilation flow rates (which include motor ventilation
and compressor intake). Furthermore, when package location makes it necessary to duct fresh cooling air in/out,
these ducts must be sized with a maximum (total) pressure loss of .1 inch water gauge to avoid impacting the
heat exchanger cooling air system. An external ventilation fan may be required to properly evacuate hot air from
the compressor room.
Minimum Cooling Air Flow Requirements
CFM
KW
Air-Cooled
Heat
Exchangers
Enclosure
Ventilation
11 1500
175
Figure 6-1 – AIR FLOW CHART
All the required hardware, mechanical and electrical connections have been made at the Gardner Denver factory,
thus the only regular maintenance required is to keep the exterior core fins free from dirt and other airborne debris
per the following procedure:
Air-cooled heat exchanger cores are fabricated from aluminum. Do not use
caustic liquids to cleanse core or permanent damage will take place.
1. Be sure the unit is completely off and that oil reservoir is depressurized.
2. Disconnect, lockout and tagout power supply to the compressor package.
3. Open and/or remove enclosure door panels adjacent to cooler assembly. The fan and bottom of cooler
core are now accessible. If additional access is required, locate and remove side plates. See Figure 1-3,
page 10, for details.
4. Inspect core area. If blocked with debris, use a moderate (e.g., 100psi) source of compressed air and/or
water while directing nozzle (pointed through core to inside) to dislodge debris and clean. Vacuum
C
C
C
A
A
A
U
U
U
T
T
T
I
I
I
O
O
O
N
N
N
Summary of Contents for VS-11
Page 10: ...13 18 604 Page 9 Figure 1 2 PACKAGE OUTLINE AIR COOLED 300CGA804 A Ref Drawing Page 1 of 2...
Page 11: ...13 18 604 Page 10 Figure 1 3 PACKAGE OUTLINE AIR COOLED 300CGA804 A Ref Drawing Page 2 of 2...
Page 28: ...13 18 606 Page 27 Figure 4 1 ELECTRICAL ENCLOSURE HARDWARE 302CGA810 D Ref Drawing...
Page 31: ...13 18 606 Page 30 Figure 4 2 PIPING AND INSTRUMENTATION ILLUSTRATION 300CGB797 B Ref Drawing...
Page 67: ......