M&C TechGroup EC-30_FD Operator's manual - Manual (Page 12)

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Gas sampling and gas conditioning technology 3-4.20-ME
The EC30  is equally suitable for wall installation or mounting in a
19” rack. The versions differ in the
positioning of the LED function display . While for wall installation the LED function display  can be
fitted into the corresponding cut-outs in the EC30
front panel, for 19” rack mounting this is done using
the cut-outs in the back panel of the casing. This positioning is done at the factory when stating the
type of installation of the EC30 gas cooler. It is relatively simple to subsequently reconfigure it on site
at the user location. The location for installation of the LED function display  is marked
correspondingly.
On the upper side of the cooler casing you will see the cut-outs for the heat exchangers of the pre-
cooling stage  and for the two low-temperature stages  and . Sample gas enters the pre-cooling
stage  at the 4/6 hose connection on the upper part of the heat exchanger. At the rear part of the
casing the condenser  to remove heat given off in the compressor can be seen. The mains power
connector, EC automatic control board and EC30 control board with the contact outputs for the status
alarm are located in two plastic housings  respectively behind the removable front panel of the EC30
casing.
On the underside of the casing the following connections are provided as standard: cable glands
PG13,5  to the plastic housings ;  condensate outlets GL25/12 from the heat exchangers , 
and ;  sample gas outlet DN4/6.
As standard, the condensate is removed externally with collecting vessels, peristaltic pumps, or by
”over-pressure operation”, with automatic float condensate traps, as e.g. type AD-... The heat energy
from the cooling system is drawn off by a forced-ventilation . The required fans  and large air
suction filter elements are provided as standard in universal unit EC-f . This is arranged below the
EC30 casing and is absolutely essential for operation of the cooler unit. Optionally, the universal unit
EC-F can be replaced by an automatic condensate removal unit EC-FD , which is likewise located
below the casing of the cooler. Apart from the above-mentioned condenser forced ventilation, the EC-
FD unit has three peristaltic pumps of type SR25.1 for automatic condensate removal. This can also
be set in underpressure operation (suction operation).
The connections for the sample gas outlet  and the condensate outlet are located in the front
panel of the EC-FD unit.
10 FUNCTION
The patented M&C EC30(/FD) gas cooler is a combined two stage compressor Peltier cooler with
status alarm capability. Automatic defrosting of the double-construction low temperature stage ensures
100% availability of the cooler. The pre-cooling stage  (see fig. 1) of the cooler is equipped with a jet
stream EC heat exchanger made of Duran glass. Figure 3 shows a schematic diagram of the
functioning of the heat exchanger.
+5°C
Sample gas
out
Sample gas
in
Condensate out
Cooling-
block
Figure 3 Schematic diagram of functioning of heat exchanger
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