Operating Ranges
Connection Pipe Requirements
Heating Operating Range Outdoor Temperature -22 - 75°F (-30 - 24°C)
Cooling Operating Range Outdoor Temperature 0 - 129°F (-18 - 54°C)
Indoor Operating Range Indoor Temperature 61 - 86°F (16 - 30°C)
10
38 Series Mini-Split
NOTICE
The maximum distance of the connection piping in both height and total length is provided in the
table below. Do not install these units in locations that exceed these specifications.
NOTES:
1. The connection pipes should be insulated with proper water-proof insulating material
2. Wall thickness of pipe 0.02-0.04 in (0.5-1.0 mm): bearing pressure 435 PSI (3.0 MPa).
3. Shorter connecting pipe lengths result in greater thermal efficiency, so it is preferable to reduce
connecting pipe lengths where possible.
4. Refer to the oil trap instructions for specific requirements when there is height difference
between the indoor and outdoor unit greater than 20 ft. (6m).
Heat Pump
4TXK3809B 4TXK3812A 4TXK3818A 4TXK3824A
4MXW3809B 4MXW3812A 4MXW3818A 4MXW3824A
Refrigerant Charge (oz.) 46 49 74 81
Standard Length ft (m) 25 (7.6)
Additional Refrigerant Charge (oz/ft)
For Piping Beyond Standard Length
0.2 0.5
Outer Diameter
Liquid Pipe in. (mm)
Φ 1/4" (6.35)
Gas Pipe in. (mm)
Φ 1/2" (12.7) 5/8" (15.875)
Max Distance
Height ft. (m)
49 (15)
Length ft. (m)
100 (30)
Minimum Piping Length ft. (m) 10 (3)
Compressor Oil Used DAPHNE FVC50K (PVE Oil) RB68EP (POE Oil)
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