M&C TechGroup EC-EX Operator's manual - Manual (Page 19)

19
Gas sampling and gas conditioning technology 3-4.1ME EC-EX 9904
18.1 ADDING AND REPLACING THE HEAT EXCHANGERS
Removal of the heat exchangers may be necessary to carry out maintenance or repair work.
We recommend the following procedures and in this order for replacement of the heat exchangers:

Release the upper gas connections and lower condensate connections;

Pull the heat exchangers upwards with rotation out of the cooling block;
Replace the heat exchangers as follows:

Dry and clean the push-in opening in the aluminium cooling block with a cloth;

Smear the heat exchangers with a thin and equal layer over the whole surface with thermal
conductivity paste (part no. 90K0115) to ensure good conduction of heat. It is best to close off the
condensate removal of the heat exchangers tube with adhesive tape to prevent any of the thermal
conductivity paste from getting into the heat exchanger;

Lightly push the heat exchangers with rotation back into the push-in opening of the cooling block
and press to the upper block;

Remove the adhesive tape and any surplus thermal conductivity paste;

Reconnect the hoses.
N O T E !
Do not mix up the hose connections; gas outlet and gas inlet are marked
with arrows!
Mounting the Borosilicate glass heat exchangers please notice:

Check the PTFE/Silicon locking rings for damage. in assembly, the locking rings must have the
PTFE side facing the medium, otherwise the required degree of sealing cannot be guaranteed!

Do up the red GL coupling rings hand-tight by turning them to the right;