Service Manual | VMH Series | Heat Controller, Inc. |
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6.2 Pipe length and the elevation:
1.Single Zone “V” Series Inverter System:
Capacity |
| Pipe Size | Standard |
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| Max | Total |
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| Additional | ||
Btu/h | Gas | Liquid | Length A |
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| Elevation B | Line Length (ft) A | Refrigerant | |||||
| (in) | (in) | (ft) |
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| (ft) | Min. |
| Max. | oz/ft | ||
9k | 3/8 | 1/4 | *16.5 | 26 | 10 |
| 65.5 |
| .2 | ||||
12k | 1/2 | 1/4 | *16.5 | 26 | 10 |
| 65.5 |
| .2 | ||||
18k | 1/2 | 1/4 | *16.5 | 32 | 10 |
| 82 |
| .2 | ||||
24k | 5/8 | 3/8 | *16.5 | 32 | 10 |
| 82 |
| .4 | ||||
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| Refrigerant Charge (oz) |
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| Unit Model # |
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| Heat Pump |
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| VMH09SC |
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| 38.8 oz. |
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| VMH12SC |
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| 44.1 oz. |
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| VMH18SC |
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| 58.2 oz. |
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| VMH24SC |
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| 67.0 oz. |
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*Unit charge located on rating plate includes enough refrigerant for 16.5 feet of line set. *Charge adjustment is not required on line set lengths less than 16.5 feet.
*Capacity is based on standard line set lengths and maximum length is based on reliability.
Oil Traps:
It is not necessary to install oil traps when outdoor unit is located lower than indoor unit.
It is recommended that a trap be installed when outdoor unit is installed 16.5’ higher than indoor unit.
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