Specifications

36
Maximum Pipe Length And Maximum Number Of Bends
When the pipe length becomes too long, both the capacity and reliability drop. As the number of bends increases,
system piping resistance to the refrigerant flow increases, thus lowering the cooling capacity, and as a result the
compressor may become defective. Always choose the shortest path and follow the recommendations as tabulated
below :
MMSD / M4MSD MMST/M4MST MMST
MODEL
DATA
1010A – 1515A 1020A – 1520A 2020A 101010A – 151515A/AR 101020A
Max. Length (L) m 12 / 12 12 / 15 15 / 15 12 / 12 / 12 12 / 12 / 15
Max. elevation (H) m 5 / 5 5 / 8 8 / 8 5 / 5 / 5 5 / 5 / 8
Max. No. of Bends 10 / 10 10 / 10 10 / 10 10 / 10 / 10 10 / 10 / 10
Model Circuitry Max.
Individual
L1 or L2 (m)
*Max. Total
L1 + L2 (m)
*Max. Length
Difference
L1 – L2 (m)
Max.
Elevation
H (m)
*Max. Height
Difference
∆H(m)
*Max.
Number of
bends
MMSH8K8A COMP. A 12 - - 5 - 10
COMP. B 12 - - 5 - 10
MMSH8K66A COMP. A 12 / 12 20 8 5 7 10
COMP. B 12 - - 5 - 10
MMSH66K66A COMP. A 12 / 12 20 8 5 7 10
COMP. B 12 / 12 20 8 5 7 10
MMSH66K555A COMP. A 12 / 12 20 8 5 7 10
COMP. B 12 / 12 20 8 5 7 10
* For units sharing the same compressor only.
CAUTION :
• Our guarantee on the performance of our air-conditioners will be revoked if the height, length and/or the number of
bends of the refrigerant piping system installed is beyond the limit above.
• Bendings must be carefully made so as not to crush the pipe. Use a pipe bender to bend a pipe s far as possible.
1) MMSD
2) MMST