MrCool Universal MDUI180 E Series - Oil Return Bends Installation

Page 12
mrcool.com
Unit Installation
Fig. 2.6
Fig. 2.7
Install an oil
return bend
every 6 m
Oil return bend
System gas pipe
Outdoor unit
Indoor unit
Outdoor unit
Non-return bend
System gas pipe
Oil return bend
Indoor unit
Install an oil
return bend
every 6 m
OIL RETURN BENDS
Add an oil return bend as described below:
IF Outdoor unit is beneath the indoor unit, there is no need to add a non-return bend at the lowest or
highest position of the vertical pipe, as shown below in Fig. 2.6:
IF Outdoor unit is above the indoor unit, it is necessary to add an oil return bend and a non-return
bend at the lowest and highest position of the vertical pipe, as shown below in Fig. 2.7:
Use the following dimensions in Fig. 2.8 to form the oil return bend(s):
C
B
A
A (Pipe Diameter)
B C
Ф12
Ф1/2
≥26
≤150
Ф16
Ф5/8
≥33 ≤150
Ф19
Ф3/4
≥34
≥1
≥1.3
≥1.34
≥5.91
≥5.91
≥5.91
≤150
Fig. 2.8
mmInches mmInches mmInches