QHPR Installation & Operating Instructions
Installation
Ambient Air Temperature
Locate the dryer indoors where the
ambient air temperature will be between
40°F and 100°F. Intermittent operation
at ambient temperatures up to 113°F will
not damage the dryer but may result in a
higher dewpoint 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.
Call your local distributor if prolonged
operation at ambient temperatures above
100°F or below 40°F is unavoidable.
Location and Clearance
Mount the dryer on a level base. Install
the dryer in a clean, well-ventilated area to
reduce fouling of the condenser coils with
dirt and dust.
Wall Mounting - Dryer may be wall
mounted by using an optional wall
mounting bracket. Clearance must be
maintained on all other sides as indicated.
LOCKING
CLIP STUD
EXISTING
INSTALLATION
NEW
INSTALLATION
DRYER
HANGER
Optional Wall Mounting Bracket
Vapors and contaminants corrosive to
copper and aluminum must not be in the
area of the dryer or air compressor intake.
Allow at least 6 inches clearance from the
front and from the condenser coil service
access. Install the dryer with the frame
level. Anchor bolts are not required.
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 1°F and
the inlet air does not contain any liquid
water.
Most compressed air systems require
filters for removal of solid and liquid
contaminants. When an oil-removal filter
is used, it should be installed downstream
of the refrigerated dryer. The dryer will
remove some entrained dirt, extending the
life of the replaceable filter element. Outlet
air temperature may be 10°F to 30°F
higher than inlet air temperature. This is
normal. Consult your distributor if a lower
outlet air temperature is required.
COMPRESSOR
OIL REMOVAL
FILTER
AFTERCOOLER
AUTOMATIC DRAIN
DRYER
SEPARATOR
RECEIVER
Typical Compressed Air System
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 filters. Inlet and outlet
shutoff valves and a 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.
Quincy Compressor-QHPR Series Dryers
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