INSTALLATION, OPERATION AND MAINTENANCE MANUAL
FW cooling only range – Monosplit single-phase
Caution: the use of a manual that is not up to date with the condensing unit version does not
engage the responsibility of LTB
10 INSTALLATION : FILLING OF REFRIGERATING GAS
The intervention must be carried out by a person with the appropriate skills and qualifications.
In particular, it must have the certificate of suitability for the handling of refrigerants. In addition,
the company employing this person must have a certificate of ability.
Once the connections have been made, airtightness must be checked keeping the flared valves closed:
Pressurizing dehydrated nitrogen and pressure maintenance control. Check sensitive areas with a
leak detector.
Vacuum drawing: obtain a pressure of 10
-4
bar and maintain it for 1 hour. Then check the vacuum
resistance.
Once the airtightness is checked, the flare valves must be opened. CUs are delivered loaded for a distance of
4 meters of piping. If the lengths are higher, the load must be completed, compressor running, using a load
balance, while controlling the overheating and respecting the operating ranges in chapter 14.
The final load of the installation must be reported by the installer on the condensing unit.
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