Control Panel - morse AHT 20 Manuel D'instructions

The control panel illustrated below is the only dryer-operator interface.
1 Main switch
2 Electronic control instrument DMC14
Operating principal – The dryer models described in this manual all operate on the same principal. First the very hot
moisture laden air directly from the compressor enters the aftercooler (copper tube / aluminum fin cooling surface)
where it is cooled to within 18-20° F (10-12° C) of the ambient air temperature. It leaves the aftercooler with entrained
condensed water droplets which are separated by the 3 micron FTP bulk liquid filter separator element and drained
away by the first drain system. The partially cooled moisture laden air next enters an air to air heat exchanger to pre-cool
it. The compressed air next goes through the evaporator, also known as the air to refrigerant heat exchanger. The
compressed air temperature is reduced to approximately 41° F (5° C), causing additional water vapor to condense to
liquid. The liquid is continuously coalesced and collected in the dryer separator for automatic removal by the second
condensate drain. The cool moisture free compressed air then passes back through the air to air heat exchanger to be
reheated to within the ambient temperature as it exits the dryer.
Refrigerant circuit - Refrigerant gas is cycled through the compressor and exits at high pressure to a condenser
where heat is removed causing the refrigerant to condense to a high-pressure liquid state. The liquid is forced
through a capillary tube where the resulting pressure drop allows the refrigerant to boil off at a predetermined
temperature. Low-pressure liquid refrigerant enters the heat exchanger where heat from the incoming air is
transferred causing the refrigerant to boil; the resulting phase change produces a low pressure, low temperature
gas. The low-pressure gas is returned to the compressor, where it is re-compressed and begins the cycle again.
During those periods when the compressed air load is reduced the excess refrigerant is by-passed automatically
back to the compressor via the Hot Gas By-pass Valve circuit.

5.1 CONTROL PANEL

1
0
1
I
ON
set
1
AHT 20 - 75
DMC14
2
AHT 100 - 350
DMC 14
°C
°F
esc
2
3 Air and refrigerating gas flow diagram
5.2 OPERATION
3
3
GB
K
K