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Always check the gas density WARNING limit for the room in which the
unit is installed.
When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally leaks out, its density does not exceed the limit level for that room. If the density could exceed the limit level, it is necessary to provide an opening between the unit and the adjacent room, or to install mechanical ventilation which is interlocked with a leak detector.
(Total refrigerant charged amount: oz)
(Min. indoor volume where the indoor unit is installed: ft.3)
<Limit density 0.3 (oz/ft.3)
The limit density of refrigerant which is used in this unit is 0.3 oz/ft.3 (ISO 5149).
The shipped outdoor unit comes charged with the amount of refrigerant fixed for each type, so add it to the amount that is charged in the field. (For the refrigerant charge amount at shipment, refer to the unit’s nameplate.)
Pay special attention to any CAUTION location, such as a basement,
etc., where leaking refrigerant can accumulate, since refrig- erant gas is heavier than air.
(1)Refer to “HOW TO ATTACH DISTRIBUTION JOINT” enclosed with the optional distribution joint kit
(2)When creating a branch using a commercially available
[Header joint system]
●Be sure to solidly weld shut the
●When using the header joint system, do not make fur- ther branches in the tubing.
●Do not use the header joint system on the outdoor unit side.
(3)If there are height differences between indoor units or if branch tubing that follows a distribution joint is connect- ed to only 1 unit, a trap or ball valve must be added to that distribution joint. (When adding the ball valve, locate it within 15 - 3/4" of the distribution joint.)
If a trap or ball valve is not added, do not operate the system before repairs to a malfunctioning unit are completed. (The refrigerant oil sent through the
15
tubing to the malfunctioning unit will accumulate and may damage the compressor.)
Minimum indoor volume & floor area as against the amount of refrigerant is roughly as given in the follow- ing table.
| ft.3 |
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| ft.2 |
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| 10000 |
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| 1136 |
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indoorMin.volume | 9500 |
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| 1079 | indoorMin.floor area | ceilingthe(whenis 8.8 ft. high) |
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| the density | limit of |
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2000 |
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| 227 | ||||||||||
| 9000 |
| Range below |
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| 1022 |
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| 8500 |
| the density limit of |
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| 966 |
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| 8000 |
| 0.3 oz/ft.3 |
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| 909 |
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| 7500 |
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| 852 |
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| 7000 |
| (countermeasures |
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| 795 |
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| 6500 |
| not needed) |
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| 738 |
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| 6000 |
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| 682 |
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| 5500 |
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| 625 |
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| 5000 |
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| 568 |
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| 4500 |
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| 511 |
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| 4000 |
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| 454 |
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| 3500 |
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| 398 |
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| 3000 |
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| Range above |
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| 341 |
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| 2500 |
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| 284 |
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| 0.3 oz/ft.3 |
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| 1500 |
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| 170 |
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| 1000 |
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| (countermeasures |
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| 114 |
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| 500 |
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| needed) |
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| 57 |
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| 0 |
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| 0 |
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| 0 | 500 | 1000 | 1500 | 2000 | 2500 | 3000 |
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| oz |
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Total amount of refrigerant
Tube branching methods (horizontal use)
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| B | |
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| A | Horizontal | A | ||
| B | line | View as seen | |||
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| from arrow | ||
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| Arrow view |
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Header joint system (Indoor) | ||||||
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| Install at a |
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| positive angle |
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Outdoor |
| Indoor |
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| Install at a | |
Indoor |
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| positive angle | |
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| (15 – 30°) | ||
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Horizontal |
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line |
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| Indoor |
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L3 | 6.56 ft. | Horizontal | Solidly welded | |||
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| line |
| shut (X) | ||
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Types of vertical trap specifications | ||||||
(When using ball valve) |
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Main tubing |
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Ball valve | Indoor unit (more than 2 units) | |||||
(If only 1 unit is connected, a ball valve | ||||||
(BV: purchased | ||||||
separately) | is also needed on this side.) | |||||
Indoor unit (1) |
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(When not using ball valve) |
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Main tubing |
| Horizontal |
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| Indoor unit | (Each unit is connected | |||
Branch tubing is |
| to tubing that is either | ||||
| level or is directed | |||||
directed upward. |
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| downward.) | |||||
| More than |
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Indoor unit is directed downward |
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2008/02/07 10:55:40 |
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