FScurtis RNP Series, Operator'S Manual, Page: 3 / 16

3
Compressor
Oil Removal
Filter
Aftercooler
Automatic Drain
Dryer
Separator Receiver
TYPICAL COMPRESSED AIR SYSTEM
INSTALLATION
Ambient Air Temperature
Locate the dryer indoors where the ambient air temperature
will be between 45°F and 110°F. Intermittent operation at
ambient temperatures up to 113°F will not damage the dryer
but may result in a higher dew point or dryer shutdown
due to high refrigerant discharge pressure (see Field Service
Guide).
Do not operate air-cooled dryers at ambient air temperatures
below 40°F. Such operation may result in low suction
pressure, causing freeze-up.
Location and Clearance
Mount the dryer on a level base. If the base vibrates, bolt
the unit down using vibration dampeners. If the dryer is
air-cooled, install it in a clean, well-ventilated area to reduce
fouling of the condenser coils with dirt and dust. Allow at
least 24 inches clearance on the sides and the front of the
dryer for cooling airflow and for service access.
System Arrangement
Liquid water in the inlet air will adversely affect the
performance of the dryer. Install the dryer downstream of an
aftercooler or separator so that the temperature of the dryer
inlet air does not exceed 120°F and the inlet air does not
contain any liquid water.
If the compressed airflow is relatively constant and does not
exceed the dryer flow rating, it is recommended that the
dryer be located downstream of the receiver tank. If the
nature of the application is such that the air demand regularly
exceeds the dryer flow rating, it is recommended that the
dryer be located upstream of the receiver.
For safety and convenience, install inlet and outlet shutoff
valves and depressurization valves. These valves allow the
dryer to be isolated and depressurized for servicing. Bypass
piping may be installed around the dryer for uninterrupted
airflow when the dryer is serviced. If the compressed air
operation cannot tolerate undried air for short periods, install
a second dryer in the bypass line.
Compressed air systems commonly require filters to remove
compressor oils, particulates, condensed liquids and other
contaminants. When an oil-removal filter is used, it should
be installed downstream of the refrigerated dryer. At
this location, the life of the replaceable filter element is
prolonged since some of the entrained oil is removed by the
dryer and drained through the separator.
Piping and Connections
Piping must be furnished by the user unless otherwise
specified. Connections and fittings must be rated for the
maximum operating pressure given on the dryer data plate
and must be in accordance with applicable codes. Support
all piping; do not allow the weight of any piping to stress the
dryer or filter connections. Inlet and outlet shutoff valves and
a valved bypass valve are recommended. Piping should be at
least the size of the inlet and outlet connections to minimize
pressure drop in the air system. See Engineering Data section
for dryer inlet and outlet connections.
Removing Condensate
Condensate must be drained from the dryer to prevent re-
entrainment. The dryers are equipped with automatic drain
valves and internal drain hoses up to the drain connections
on the dryer cabinets. The user must install a separate
discharge line at the drain connection to carry off condensate
to an environmentally approved condensate collection/
disposal system. Piping or copper tubing 1/2 inch or larger
is recommended for condensate discharge lines. Install the
drain lines so that condensate can be seen as it drains.
Electrical Connections
The dryers are constructed according to NEMA Type 1
electrical standards. Field wiring must comply with local and
national fire, safety and electrical codes. Installation must
be in accordance with the National Electrical Code. Confirm
that your line voltage is the same as the voltage listed on the
dryer data plate. Refer to Figure 1 for electrical schematics.
Operation of dryers with improper line
voltage constitutes abuse and could affect the dryer
warranty.