Specifications

8
TM-M5LCY-I-2011 Application Information
Refrigerant Piping
Piping Length and Elevation
If the pipe is too long, both the capacity and reliability of the unit will drop. As the number of bends increases,
resistance to the fl ow of refrigerant system increases, thus lowering cooling capacity. As a result, the
compressor may become defective. Always choose the shortest path and follow the recommendations as
tabulated below:
Outdoor M5LCY10DR M5LCY15DR M5LCY20CR M5LCY25CR
Indoor M5WMY10JR M5WMY15JR M5WMY20JR M5WMY25JR
Max. allowable length, m 15 15 30 30
Max. allowable elevation, m 10 10 10 10
Liquid pipe, mm O.D. 6.4 O.D. 6.4 O.D. 6.4 O.D. 6.4
Gas pipe, mm O.D. 9.5 O.D. 12.7 O.D. 12.7 O.D. 15.9
Additional charge of refrigerant, g/m
(for piping length above 7.5m)
20 20 20 20
Outdoor M5LCY10DR M5LCY15DR M5LCY20CR
Indoor M5CKY10CR M5CKY15CR M5CKY20CR
Max. allowable length, m 15 15 30
Max. allowable elevation, m 10 10 10
Liquid pipe, mm O.D. 6.4 O.D. 6.4 O.D. 6.4
Gas pipe, mm O.D. 9.5 O.D. 12.7 O.D. 12.7
Additional charge of refrigerant, g/m
(for piping length above 7.5m)
20 20 20
Outdoor M5LCY20CR M5LCY25CR
Indoor M5CKY20ER M5CKY25ER
Max. allowable length, m 30 30
Max. allowable elevation, m 10 10
Liquid pipe, mm O.D. 6.4 O.D. 6.4
Gas pipe, mm O.D. 12.7 O.D. 15.9
Additional charge of refrigerant, g/m
(for piping length above 7.5m)
20 20
Outdoor M5LCY10DR M5LCY15DR M5LCY20CR M5LCY25CR
Indoor M5CCY10CR M5CCY15CR M5CCY20CR M5CCY25CR
Max. allowable length, m 15 15 30 30
Max. allowable elevation, m 10 10 10 10
Liquid pipe, mm O.D. 6.4 O.D. 6.4 O.D. 6.4 O.D. 6.4
Gas pipe, mm O.D. 9.5 O.D. 12.7 O.D. 12.7 O.D. 15.9
Additional charge of refrigerant, g/m
(for piping length above 7.5m)
20 20 20 20
Outdoor M5LCY15DR M5LCY20CR M5LCY25CR
Indoor M5CMY15ER M5CMY20ER M5CMY25ER
Max. allowable length, m 15 30 30
Max. allowable elevation, m 10 10 10
Liquid pipe, mm O.D. 6.4 O.D. 6.4 O.D. 6.4
Gas pipe, mm O.D. 12.7 O.D. 12.7 O.D. 15.9
Additional charge of refrigerant, g/m
(for piping length above 7.5m)
20 20 20
* Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance.
Remark: The refrigerant pre-charged in the outdoor unit is for piping length up to 7.5m.