Connection Pipe Requirements - Trane 15 Series 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
M4THS1509A M4THS1512A
M4MHW1509A M4MHW1512A
24.7
Φ 9.52 (3/8")
30 (100)
DAPHNE FVC50K (PVE Oil)
M4TCS1509A M4TCS1512A
M4MCW1509A M4MCW1512A
24.7
Φ 9.52 (3/8")
30 (100)
DAPHNE FVC50K (PVE Oil)
Outdoor Temperature
Outdoor Temperature -4 - 75°F (-20 - 24°C)
Indoor Temperature
M4THS1518A
M4MHW1518A
30 49.4
7.6 (25)
0.2
Φ 6.35 (1/4")
Φ 12.7 (1/2")
20 (65)
3 (10)
RB68EP (POE Oil)
M4TCS1518A
M4MCW1518A
30 35.3
7.6 (25)
0.2
Φ 6.35 (1/4")
Φ 12.7 (1/2")
20 (65)
3 (10)
RB68EP (POE Oil)
0 - 115°F (-18 - 46.1°C)
61 - 86°F (16 - 30°C)
M4THS1524A
M4MHW1524A
65.3
0.5
15.875 (5/8")
40 (130)
M4TCS1524A
M4MCW1524A
56.4
15.875 (5/8")
40 (130)
88-M4MHW15-1D-EN