Figure 6-1 - Air Flow Chart - Gardner Denver AirSmart VS80-110B Operating And Service Manual


The lubricating and cooling oil must be kept at a normal operating temperature below 225F in order
to preserve its longevity.

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 689 cfm with
2.0 psid pressure loss (VS110 package).
AIR COOLED HEAT EXCHANGERS – Air cooled cores (radiator-type) are provided as standard feature.
Two (2) radial fans, located behind the fresh air inlet grille, pump the required amount of cooling air and
expel it through an opening on the enclosure roof. Each fan is driven by a close-coupled, IP54-protected,
electric motor which also includes an integrated electronic controller for variable speed modulation and
fan overload protection.
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.
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 – See Fig 1-3, Page 10, for
details.
4. Prior to do any cleaning of the heat exchanger cores, cover the main motor roof vents, air filter intake
vent (opening faces upwards), and Smart mixing valve assembly with suitable water-proof material
(e.g., plastic sheet). This will avoid depositing debris and/or water on these areas.
5. Inspect core area. If blocked with debris, use a moderate (e.g., 100psi) source of compressed air
and/or water while directing nozzle (pointed downward through core) to dislodge debris and clean.
Vacuum (applied from outside) can also be employed to clean the heat exchanger cores.
6. Remove all loose debris and water from cooler box after cleaning process is complete. Also remove
temporary covers on main motor roof vents, air filter intake, and Smart valve assembly.
7. Re-install enclosure door panels.
Minimum Cooling Air Flow Requirements
CFM
Air cooled
Heat
KW Exchangers
80 14299
110 15183
Figure 6- 1 – AIR FLOW CHART
13-18-612 Page 57
Enclosure
Ventilation
Fans
3895
3895
6-2