4
1.2 Mounting
Mount the dryer on a level solid surface. Holes are provided in
the dryer base to permanently mount the dryer to the floor.
1.3 Piping connections
A.
Air Inlet - Connect compressed air line from air source to
air inlet. (See callout drawing on page 3 for air in/outlet
connection locations)
Refer to Serial Number Tag for maximum
working pressure. Do not exceed dryer’s Maximum Working
Pressure.
NOTE: Install dryer in air system at highest pressure possible
(e.g. before pressure reducing valves).
NOTE: Install dryer at coolest compressed air temperature
possible. Maximum inlet compressed air temperature: 120
°
F
(49
°
C). If inlet air exceeds this temperature, precool the air
with an aftercooler.
B.
Air Outlet - Connect air outlet to downstream air lines.
C.
By-pass piping - If servicing the dryer without
interrupting the air supply is desired, piping should
include inlet and outlet valves and an air by-pass valve.
D.
Water-cooled models - cooling water inlet and outlet
1.
Connect cooling water supply to cooling
water inlet.
2.
Connect cooling water return line to cooling
water outlet connection.
NOTE: Strainer and water regulating valve are supplied on
water-cooled models. Also, it is recommended to add water
inlet/outlet temperature and pressure gauges to the water
piping.
1.4 Electrical connections
IMPORTANT: Use copper supply
wires only.
A.
Dryer is designed to operate
on the voltage, phase, and
frequency listed on the serial number tag.
B.
Electrical entry is through a hole in the cabinet, located in
the separator compartment near the top, and in the
electrical enclosure. Connect power source to the
terminal strip in the electrical enclosure as shown on the
electrical schematic included with the dryer.
If optional disconnect is supplied, use entry hole in
disconnect enclosure.
NOTE: Refrigeration condensing unit is designed to run
continuously and should NOT be wired to cycle on/off with
the air compressor.
1.5 Electronic Demand Drain
A.
An automatic electric demand drain (EDD)
discharges condensate removed by the
separator.
B.
All dryer models are supplied with one
EDD. Models with the additional (optional)
oil removal filter are supplied with a second EDD.
1
2
3
4
C.
At installation install the petcock on the bulkhead fitting
for the manual drain. For manual draining, convenient
dryer depressurization, and EDD service, a three-way
valve at the bottom of the moisture separator and before
the EDD is installed. For manual draining, turn the valve
handle so it is in a horizontal position. Open the petcock
on the side of the dryer base pan to discharge the
condensate or to depressurize the dryer if it has been by-
passed. The petcock can be left in a throttled (partially
opened) position should there be a problem with EDD.
The drains are piped to fittings in the back leg of the unit.
Condensate should be piped from this fitting to an open
vented floor drain or sump.
NOTE: Discharge is at system pressure. Drain line should
be anchored.
NOTE: Condensate may contain oil. Comply with applicable
laws concerning proper disposal.
D.
Verify that isolation valves are open. If the drain fails to
discharge after the valve is energized, the electronic
control circuit will repeatedly energize the valve in an
attempt to clear the discharge port. If, after 60 seconds,
the drain still fails to discharge, the control circuit then
switches to the alarm mode. In this mode the valve is de-
energized and the red alarm light is activated on the
drain and the dryer controller. The valve is then automati-
cally energized every 4 minutes for 5 seconds. Check the
drain operation. Push drain (push-to-test) button on the
emm (Energy Management Monitor) control board to
energize drain. A flow of condensate and/or air should be
present at the drain outlet. The alarm mode automatically
clears after the drain returns to normal operation.
E.
Condensate enters the reservoir (1) through the inlet
port. When the condensate level in the reservoir covers
the capacitance sensor, an electronic signal is sent to
the solid state countdown processor. The processor
delays the opening of the solenoid valve for a given
period of time. Once the time has elapsed, the solid state
processor transmits information to energize the coil in
the solenoid valve (2).The magnetic force of the coil
causes the solenoid core (3) to move, closing the pilot air
supply line and opening the pilot air exhaust line. After
the pilot air above the diaphragm (4) is vented, pressure
in the reservoir opens the discharge port and forces the
condensate through the discharge port and outlet
piping.
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