Ingersoll-Rand R Series, Инструкция по установке, эксплуатации и обслуживанию

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reheating the outgoing air, it serves to eliminate sweating of
pipes in the plant air system. Most important, it increases
the temperature dew point split, preventing moisture from
condensing out of the compressed air when the air is
expanded.
Refrigeration System
The major components of this system are the COMPRES-
SOR, the CONDENSER, and the EVAPORATOR. The
compressor pumps high pressure, high temperature gas to
the condenser. The heat is dissipated through finned tubes
with the assistance of motor driven fans. On water cooled
units the heat is dissipated through a water filled tube and
shell condenser.
During the cooling process, the refrigerant changes from a
heat laden vapor to a liquid. This liquid refrigerant flows from
the condenser to the filter dryer, and then through the sight
glass which indicates refrigerant level. Immediately before
the inlet of the evaporator is a thermostatic expansion valve
which regulates the refrigerant flow to the evaporator as low
pressure cold liquid. The cold refrigerant cools the air in the
side of the evaporator. As the low pressure liquid refrigerant
absorbs the heat from the air it boils and changes to a
vapor. This low pressure, low temperature vapor is then
returned to the refrigerant compressor where it is again
compressed to a high pressure, high temperature gas, and
the refrigeration cycle repeats itself.
VCD Dryers are rated to deliver full capacity (SCFM at 35ºF
pressure dew point air) at 100 PSI line pressure, 100ºF.
inlet air, in 50º to 100ºF ambient, at 2 to 4 PSI pressure
drop. Higher line pressures, up to rated maximum and
cooler inlet air increases capacity. Free liquid water, low
pressures, higher air temperatures and condensable
chemical vapors, decrease capacity. Consult the factory for
proper dryer sizing.
5. START UP
NOTE : Please read and understand the entire operation and
maintenance manual prior to starting the dryer. This is a
brief start up procedure for those familiar with dryer opera-
tion.
CAUTION: There should be no air flow through the dryer
before or during start up. It is recommended that the dryer
be installed with bypass piping to better service the unit.
DRYER START UP PROCEDURE:
1) Make main electrical connection to dryer and apply
power. Refer to dryer name plate or manual to deter-
mine correct voltage. Leave power on unit for 8 hours
before proceeding.
2) On water cooled units make sure there is proper water
pressure and temperature supplied to the water con-
denser. (Min 25 psi and max 85º F water temperature)
3) Dryers are shipped with TAGGED refrigeration service
valves closed. TAGGED service valves must not be
opened until main power is permanently applied.
However,
ONLY TAGGED service valves must be
opened prior to start up.
• Locate
TAGGED service valves.
• Remove protective cap from valve stem. (see figure
below)
• Using a refrigeration service wrench or small crescent
wrench, turn the valve stem counterclockwise until it
stops. Occasionally it may be necessary to retighten
the packing nut (clockwise) if a leak is observed. The
valve will now be fully open.
• Replace cap.
• In case of refrigeration ball valves, you must turn 90
degrees to open as stated on valve. (See figure below)
4) Locate the compressor service toggle switch. This
service switch must be turned on immediately after
valves are opened.
· The refrigeration compressor may run briefly and then
stop. This process is called pump down. If storage
conditions were adverse, the compressor may make a
loud metallic hammering noise. If this happens, turn the
service switch off and wait half a minute, then turn back
on. Repeat this step until the compressor runs
smoothly, then stops. Leave the service switch in the
ON position.
5) The dryer is now ready to run. Turn the dryer on at the
control panel.
The digital display should start dropping.
6) With the dryer turned ON from the control panel and
cycling several times, you may now introduce com-
pressed air to the dryer. Open the inlet and outlet
ISOLATION VALVES . Close the BYPASS VALVE.
7) Check automatic drain for proper operation. Drain
should open at regular intervals based on the drain
control settings or water level.
8) Restart dryer using this procedure after maintenance,
power failure or after prolonged shutdown periods.
CAUTION : Failure to follow the above steps in the order
shown MAY result in damage to equipment NOT covered
under warranty.
Operating Instructions:
Always:
• Turn dryer ON and OFF with control panel button.
Keep power to unit during off cycles.
• Start dryer and allow it to cycle several times prior
to allowing air flow through the dryer.
• Clean condenser when dirty.
• Keep ambient temperature under 100º F.
• Keep inlet temperature under 100º F.
• Check and clean Y-strainer periodically.