morse AHT 20 Manuel D'instructions page 16

28
Alu-Dry Module
1
a - Air-to-air heat exchanger
b - Air-to-refrigerant exchanger
c - Condensate separator
2 Refrigerant pressure-switch P
3 Safety thermo-switch T
Refrigerant pressure-switch P
4
Refrigerant Fan pressure-switch P
5
6
Refrigerating compressor
7 Hot Gas By-pass Valve
8 Condenser (Air-Cooled)
Compressed air flow direction
The refrigerating compressor is the pump in the system, gas coming from the evaporator (low pressure side) is
compressed up to the condensation pressure (high pressure side). The compressors utilized are manufactured by
leading manufacturers and are designed for applications where high compression ratios and wide temperature
changes are present.
The hermetically sealed construction is perfectly gas tight, ensuring high-energy efficiency and long, useful
life. Dumping springs support the pumping unit in order to reduce the acoustic emission and the vibration
diffusion. The aspirated refrigerating
cylinders cools the electric motor. The thermal protection protects the compressor from over heating and
over currents. The protection is automatically restored as soon as the nominal temperature conditions are
reached.
5.3 FLOW DIAGRAM (Air-Cooled)
27
26
1
(AHT 300-350)
B
(AHT 125-350)
S
(AHT 300-350)
A
V
5.4 REFRIGERATING COMPRESSOR
gas, flowing through the coils before reaching the compression
2
P
B
1a
7
1b
12
T1
11
1c
13
9 Condenser fan
10 Filter Drier
11 Capillary tube
12 T1 Temperature probe (DewPoint)
13
Condensate drain isolation valve
...
21 Bekomat drainer
...
26
Aftercooler
27 Aftercooler fan (AHT 75-350)
28
Pre-Filter (3 micron)
Refrigerating gas flow direction
3 4 5
T P P
S A
6
9 M
10
21
21
GB
V
8