M&C EC Series, Инструкция по эксплуатации, Страница: 22 / 41

22 ECM-ExII | 1.02.00 www.mc-techgroup.com
Warning
Connect the cooler to earth (electrical bonding terminal). The bleeder
resistor needs to have an overall value of < 10
6
Ω .
The intervals between servicing are dependent on the process and system conditions in your facility.
The facility QA/QC plan should address the frequency for maintenance and should be updated based
on your operations.
19.1 Adding and replacing the heat exchangers
Removal of the heat exchangers may be necessary to carry out any maintenance or repair work. The
cooler does not need to be switched off while replacing the heat exchangers.
We recommend the following procedure to replace the heat exchangers:
•
Release the upper gas connections and lower condensate connections;
•
Pull the heat exchanger upwards and slightly rotate it out of the cooling block;
Replace the heat exchangers as follows:
•
Dry and clean the opening in the aluminium cooling block with a cloth;
•
Apply a thin and equal layer of thermal conductivity paste (part no. 90K0115) onto the opening;
•
Apply a thin and equal layer of thermal conductivity paste over the whole surface of the heat
exchangers (part no. 90K0115) to ensure good conduction of heat. It is best to close the
condensate removal connections of the heat exchanger with adhesive tape to prevent any
thermal conductivity paste getting into the heat exchanger;
•
Lightly push and slightly rotate the heat exchanger back into the opening of the cooling block
and press it to the upper block;
• Remove the adhesive tape and any surplus thermal conductivity paste;
•
Reconnect the tubing.
Note
Do not mix up the tubing connections!
Gas outlet and gas inlet at the heat exchangers are marked with arrows!
Mounting the Borosilicate glass heat exchangers please notice:
•
Check the PTFE/Silicon locking rings for damage. Assemble the locking rings with the PTFE
side facing the medium, otherwise the required degree of sealing cannot be guaranteed!
•
Screw-on the red GL coupling rings hand-tight by turning them to the right;
To ensure a safe connection of the sample gas or condensate tubes to the Borosilicate glass heat
exchanger(s) we recommend the use of GL-couplings. Please don’t hesitate to contact M&C or your
M&C distributer, if you have any questions about GL-couplings.