Charging
Charging
■Each outdoor unit is factory charged (see rating plate) for the evaporator as well as a 7.5 m (25 ft) line set for each indoor line.
Any time total line set is used either shorter or longer then the nominal, which is for Single Zone = 7.5m, Dual Zone = 15m, and
■Whether the line set is made shorter or longer you must adjust the charge based on how many ft of tubing are either added or removed based on 20 g (0.22 oz) of R410A per meter(foot).
| Max total | Max length of | Min length of | Max Elevation | Max elevation | Additional | |
| between each | between | |||||
Capacity | length of all | each pipe | each pipe | ||||
indoor unit and | indoor units | Refrigerant | |||||
| pipes (A+B+C) | (A/B/C) | (A/B/C) | ||||
| outdoor unit (h1) | (h2) |
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18K BTU/h | 30 m (100 ft) | 15 m (50 ft) | 3 m (10 ft) | 7.5 m (25 ft) | 7.5 m (25 ft) | 20 g/m (0.22 oz/ft) | |
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24K BTU/h | 30 m (100 ft) | 15 m (50 ft) | 3 m (10 ft) | 7.5 m (25 ft) | 7.5 m (25 ft) | 20 g/m (0.22 oz/ft) | |
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36K BTU/h | 45 m (150 ft) | 15 m (50 ft) | 3 m (10 ft) | 7.5 m (25 ft) | 7.5 m (25 ft) | 20 g/m (0.22 oz/ft) | |
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Example: A 80 ft line set is used for tri - zone 5 additional ft X 0.22 ounces per foot= add 1.1 ounces of R410A
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the charge amount specified on the unit's rating plate, adjusting for line sets longer or shorter than 7.5 m(25 ft) for each indoor unit.
26Wall Mounted