Operation and Maintenance Instructions
Envicooler
2001-03-09
Page 9
Air handling with the focus on LCC
4. Maintenance Instructions and Procedures
4.1 General
This section of the instructions is intended for general use. We’ve worded it in such a
way so as to enable you to carry out simple periodical inspections of the system and
to show you simple checks that you can carry out before having to call for qualified
service help in the event of a malfunction. If more advanced troubleshooting in the
system is necessary, you will find the information you need in the accompanying wir-
ing diagrams and special instructions for the components of the system.
4.2 Requirements by Authorities according to the Refrigerant Act
An inspector from an accredited company shall in accordance with Local Cooling
Standards, inspect one-piece cooling units containing more than 3 kg of refrigerant.
All service and modification of the cooling system and charged or emptied refrigerant
shall be recorded in the journal.
If the total volume of refrigerant exceeds 10 kg (Note! The total volume of all the units
in the building), this must be reported to the local Environmental and Public Health
Authorities and an annual report must be submitted to them.
4.3 Periodic Inspection
1. Appoint someone or qualified staff to be responsible for periodical inspections of
the cooling system. Make sure that these technicians possess knowledge of how
the system operates and where system components are located.
2. The system is designed to operate automatically.The Commissioning Record
indicates the settings at which the system was set when it was commissioned.
Make sure that the settings on the thermostats, controllers, pressure switches
and other adjustable components have not been altered by someone who lacks
knowledge about how the system operates.
3. See to it that the machine room or other component locations are kept clean.
4. Certain components in the system may require open space for contact with the
surrounding air to operate properly. Make sure that this open space is not
temporarily or permanently blocked in any way. If any of these components is
equipped with an air filter or dirt filter, check these filters every third month.
Replace filters whenever needed.
5. The cooling unit does not normally require any lubrication, oil changes or the like.
In cases where special regulations pertain to any specific system component,
this is explained in the instructions for that component.
6. The system and its components shall be inspected by qualified service
technicians at least once a year. The inspection should include the following:
– Check the refrigerant system for tightness.
– Check that the system hasn’t sustained any serious corrosion damage.
– Check that the safety equipment is in good condition.
7.
Keeping a journal.
Entries shall be made every time each system is charged or
emptied of refrigerant, the results of searches for leakage and other measures in
conjunction with inspecting and servicing the refrigerant circuit and its operation.
8. Are you uncertain about anything regarding your cooling system? If so, get in
touch with your supplier! Sometimes it’s better and cheaper to call once too often
than too seldom.
