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The manufacturer is willing to assist you in collecting
claims for loss or damage. Willingness does not make
the manufacturer responsible for collecting claims or re-
placing material. Claim filing and processing is your re-
sponsibility.
INSTALLATION
Ambient Air Temperature
Locate the dryer indoors where the ambient air tempera-
ture will be between 40°F and 100°F. Intermittent op-
eration at ambient temperatures up to 120°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). Call your local dis-
tributor if prolonged operation at ambient temperatures
above 100°F or below 40°F is unavoidable.
Do not operate air-cooled dryers at ambient air tempera-
tures below 40°F. Such operation may result in low suc-
tion pressure, causing freeze-up.
Location and Clearance
Mount the dryer on a level base and bolt down if base
vibrates. 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 24 inches clearance on
the sides and front of the dryer for cooling airflow on
air-cooled dryers and for service access on both air-
cooled and water-cooled dryers.
System Arrangement
Liquid water adversely affects dryer performance. To
prevent "slugging" the dryer with liquid water, locate
the dryer downstream of an and a separator. Install
drain valves to discharge condensate that collects in
these areas.
If the airflow is relatively constant and will not cause
short term overloading of the dryer, 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 shut-
off valves and depressurization valves at the locations
indicated. 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 opera-
tion cannot tolerate undried air for short periods, install
a second dryer in the bypass line.
1-2
Compressed air systems commonly require filters to re-
move compressor oils, particulates, condensed liquids
and other contaminants. When an oil-removal filter is
used, install the filter downstream of the DXR Series
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 pip-
ing to stress the dryer or filters. Proper sizing of piping
should be determined using good engineering practice.
See Table 8 for dryer inlet and outlet connections.
Drains
Condensate must be drained from the dryer to prevent
its reentrainment. The dryers are equipped with an auto-
matic drain valve. A condensate hose is coiled and se-
cured inside the dryer cabinet for shipping. Uncoil the
hose and run it to a waste disposal collection system
that meets applicable regulations. Install the discharge
lines so that condensate can be seen as it drains.
Pipe or copper tubing
-inch is recommended for con-
1
2
densate discharge lines. Do not use
O.D. flexible tubing unless the discharge line is shorter
than 10 feet.
Electrical Connections
Standard models are constructed according to NEMA
Type 1 electrical standard. 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 data plate.
Dryers are wired so that the crankcase heaters (if sup-
plied) and drain valves are energized when power is
supplied, even if the power switch is turned off. See the
electrical schematics for wiring details.
Cooling Water
Water-cooled condensers are optional on some models.
The suffix W on the model number indicates water-
cooled. The user is responsible for piping the water to
and from the condenser. A factory-installed water regu-
lating valve in the condenser inlet connection is stan-
dard.
Required water flow rate depends on water temperature
(refer to Table 1). The valve supplied with the dryer
automatically adjusts the flow to compensate for varia-
-inch or
-inch
1
5
4
16
DXR Series Dryers (Bulletin 553)
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