Operating Ranges
Connection Pipe Requirements
Cooling Operating Range
Outdoor Temperature 0 - 115°F (-18 - 46.1°C)
Heating Operating Range
Outdoor Temperature -4 - 75
°
F (-20 - 24
°
C)
Indoor Operating Range
Indoor Temperature 61 - 86
°
F (16 - 30
°
C)
9
115V Mini-Split
NOTICE
The maximum length of the connection pipe is listed in the table below. Do not place the units
such that the distance between them exceeds the maximum length of the connection pipe.
NOTES:
1. The connection pipe should be insulated with proper water-proof insulating material.
2. Wall thickness of pipe 0.5-1.0 mm (0.02-0.04 in): 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. See the oil trap instructions on page 21 for specific requirements when there is height
difference between the indoor and outdoor unit greater than 20 feet.
Heat Pump
M4MHW2209A
M4MHW2212A
M4THS2209A
M4THS2212A
Refrigerant Charge (oz.)
41.3
45.9
Standard Length m (ft)
7.6 (25)
Additional Refrigerant Charge (oz/ft)
For Piping Beyond Standard Length
0.2
Outer Diameter
Liquid Pipe mm (in)
Φ
6.35 (1/4")
Gas Pipe mm (in)
Φ
9.52 (3/8")
Max Distance
Height m (ft)
10 (33)
Length m (ft)
15 (50)
20 (66)
Minimum Piping Length m (ft)
3 (10)
Compressor Oil Used
RB68EP (POE Oil)
