GREE ELECTRIC DC Inverter U-match Series, Руководство пользователя

Страница: 27 / 65

DC Inverter U-match Series Duct Type Unit
22
(2) Outdoor unit is above the indoor unit.
It’s necessary to add oil return bend and non-return bend at the
lowest and highest position of the vertical pipe, as shown below:
Non-return bend
Outdoor unit
System gas pipe
Oil return bend
Install an oil return
bend every 6m
Indoor unit
Dimensions for the making of oil return bend are as follows:
C
B
A
A
B(mm) C(mm)
mm In.
Ф 9 3/8 ≥ 20 ≤150
Ф 12 1/2 ≥26 ≤150
Ф 16 5/8 ≥33 ≤150
3.2.3.2 Pipe Flaring
(1) Cut the connection pipe with a pipe cutter.
(2) The mouth of connection pipe should face downward. Remove
burrs with the cut surface so that the chips do not enter the
pipe.
(3) Remove the cut-off valve of outdoor unit and take out the flare
nut from the bag of indoor unit accessories. Then fit the flare