Charging
Charging
■Each outdoor unit is factory charged (see rating plate) for the evaporator as well as a 7.5m(25ft) line set for each indoor line. Any time the total line set is used either shorter or longer then the nominal line set length the refrigerant charge has to be adjusted.
■Whether the line set is made shorter or longer you must adjust the charge based on how many m(ft) of tubing are either added or removed based on 20g(0.22oz) of
| Max total length | Max length of | Min length of | Max Elevation | Max elevation | Additional | |
| between each indoor | ||||||
Capacity (Btu/h) | of all pipes | between indoor | |||||
each pipe (A/B) | each pipe (A/B) | unit and outdoor unit | Refrigerant | ||||
| (A+B) |
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18k | 30m(100ft) | 15m(50ft) | 3m(10ft) | 7.5m(25ft) | 7.5m(25ft) | 20g/m(0.22oz/ft) | |
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24k | 30m(100ft) | 15m(50ft) | 3m(10ft) | 7.5m(25ft) | 7.5m(25ft) | 20g/m(0.22oz/ft) | |
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| Max total length | Max length of | Min length of | Max Elevation | Max elevation | Additional | |
| between each indoor | ||||||
Capacity (Btu/h) | of all pipes | each pipe | each pipe | between indoor | |||
unit and outdoor unit | Refrigerant | ||||||
| (A+B+C) | (A/B/C) | (A/B/C) | (h1) | units (h2) |
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36k | 45m(150ft) | 15m(50ft) | 3m(10ft) | 7.5m(25ft) | 7.5m(25ft) | 20g/m(0.22oz/ft) | |
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Example: A 80ft line set is used for
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the charge amount speci- fied on the unit's rating plate, adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor unit. Unit is critically charged.
- 39 - | Service Manual |
