Connection Pipe Requirements - Trane M4MHW17-A Installer's Manual

Installer's Guide

Connection Pipe Requirements

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.
Heat Pump
Refrigerant Charge (oz.)
Standard Length m (ft)
Additional Refrigerant Charge (oz/ft)
For Piping Beyond Standard Length
Liquid Pipe mm (in)
Outer Diameter
Gas Pipe mm (in)
Height m (ft)
Max Distance
Length m (ft)
Minimum Piping Length m (ft)
Compressor Oil Used
Cooling Only
Refrigerant Charge (oz.)
Standard Length m (ft)
Additional Refrigerant Charge (oz/ft)
For Piping Beyond Standard Length
Liquid Pipe mm (in)
Outer Diameter
Gas Pipe mm (in)
Height m (ft)
Max Distance
Length m (ft)
Minimum Piping Length m (ft)
Compressor Oil Used
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.
Operating Ranges
Cooling Operating Range
Heating Operating Range
Indoor Operating Range
10
NOTICE
M4THS1709A M4THS1712A
M4MHW1709A M4MHW1712A
24.3
Φ 9.52 (3/8")
15 (49.2) 20 (65.6)
FW68DA
M4TCS1709A M4TCS1712A
M4MCW1709A M4MCW1712A
18.0
Φ 9.52 (3/8")
15 (49.2) 20 (65.6)
Outdoor Temperature
Outdoor Temperature -4 - 75°F (-20 - 24°C)
Indoor Temperature
M4THS1718A
M4MHW1718A
27.5 42.4
7.6 (25)
0.2
Φ 6.35 (1/4")
Φ 12.7 (1/2")
10 (32.8)
3 (10)
RB68EP
M4TCS1718A
M4MCW1718A
19.4 35.3
7.6 (25)
0.2
Φ 6.35 (1/4")
Φ 12.7 (1/2")
10 (32.8)
3 (10)
FW68DA
0 - 115°F (-18 - 46.1°C)
61 - 86°F (16 - 30°C)
M4THS1724A
M4MHW1724A
52.9
0.5
15.875 (5/8")
25 (82)
FW68DA
M4TCS1724A
M4MCW1724A
42.3
15.875 (5/8")
25 (82)
88-M4MHW17-1B-EN