Refrigerant Cycle Diagram - Carrier 40MBFAQ Service Manual

40MBFAQ: Service Manual

REFRIGERANT CYCLE DIAGRAM

Refrigerant Lines
General refrigerant line sizing:
1. The outdoor units are shipped with a full charge of R410A refrigerant. All charges, line sizing, and capacities are based on runs of 25 ft. (7.6 m). For
runs over 25 ft. (7.6 m), review the product data.
2. Minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m).
3. Refrigerant lines should not be buried in the ground. If it is necessary to bury the lines, not more than 36 in. (914 mm) should be buried. Provide
a minimum 6 in. (152 mm) vertical rise to the service valves to prevent refrigerant migration.
4. Both lines must be insulated. Use a minimum of 1/2 in. (12.7 mm) thick insulation. Closed-cell insulation is recommended in all long-line
applications.
5. Special consideration should be given to isolating the interconnecting tubing from the building structure. Isolate the tubing so vibration or noise is
not transmitted into the structure.
6. For piping runs greater than 25 ft. (7.6 m), add refrigerant up to the allowable length as specified in the product data.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 4 — Refrigerant Cycle Diagram - Size 12K
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