Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Compressor HVAC: Service Precautions

a. The oil should be free from moisture, dust, metal powder, etc.

b. The water content should be not more than 20 ppm.

c. Do not mix with other oil.

d. The water content in the oil increases when exposed to the air for many hours. After use, seal oil from air immediately.