Hisense AMS-07UR4SNVT4 Service Manual page 105

2 . INSTALLATION
2 . INSTALLATION
When install the unit, please follow the following principle:
4.1.The height difference between the indoor unit and the outdoor unit
should not exceed 5m;
4.2.The connection pipe length should be not less than 1m;
4.3.The longest connection pipe is 15m for the unit(Recommendation:
The longest connection pipe is 10m for 9K and 12K unit and 15m for 18K,24K
and 30K unit);
4.4. Normally, the connection pipe does not exceed 5m, if the connection
pipe exceed 5m, it should add some gas for the unit, the amount of the gas
that recharged is based on the diameter and length of the liquid pipe, and the
recharged gas Xg=(the liquid pipe length -5m)*(*sheet*g/m), for example, for
one heat pump single split air conditioner, if the diameter of the liquid pipe is
Ф9.53 , and the liquid pipe length is 7m, it means that it should charge
(7m-5m)*50g/m=100g gas for the unit refer to the following sheet:
The diameter for the
connection pipe(mm)
Liquid pipe Gas pipe
Ф9.53 or
Ф6.35
Ф12.7
Ф6.35 or Ф15.88 or
Ф9.53 Ф19.05
single split air
conditioner
heat pump（g /
cooling only
（g / m） m）
15
15
20
50