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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Service Port HVAC: Description and Operation

SERVICE GAUGE PORT VALVES

Service Gauge Port Valves:

The fitting is an integral part of the refrigeration line or component.
- Special couplings are required for both the high side and low side service gauge ports.
- The Schrader-type valve core can be serviced if the seal leaks.
- Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.