![background image](http://html1.mh-extra.com/html/daikin/ryyq8t7y1b/ryyq8t7y1b_installation-and-operation-manual_4701695024.webp)
Installation and operation manual
19
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
10.2.4. Branching the refrigerant piping
For installation of the refrigerant branching kit, refer to the
installation manual delivered with the kit.
1
Horizontal surface
1
Mount the refnet joint so that it branches either horizontally or
vertically.
2
Mount the refnet header so that it branches horizontally.
Installation of the multi connection piping kit.
1
Install the joints horizontally, so that the caution label (1)
attached to the joint comes to the top.
-
Do not tilt the joint more than 15° (see view A).
-
Do not install the joint vertically (see view B).
2
Make sure that the total length of the piping connected to the
joint is absolute straight for more than 500 mm. Only if a
straight field piping of more than 120 mm is connected, more
than 500 mm of straight section can be ensured.
3
Improper installation may lead to malfunction of the outdoor
unit.
10.3. Guidelines for handling stop valve
10.3.1. Cautions on handling the stop valve
Make sure to keep both stop valves open during operation.
The figure below shows the name of each part required in
handling the stop valve.
The stop valve is factory closed.
10.3.2. How to use the stop valve
Opening the stop valve
1
Remove the valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3
When the stop valve cannot be turned any further, stop turning.
The valve is now open.
To fully open the Ø19.1 or Ø25.4 gas line stop valve, turn the
hexagonal wrench until a torque between 27 and 33 N•m is achieved.
Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.
Closing the stop valve
1
Remove the valve cover.
2
Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3
When the stop valve cannot be turned any further, stop turning.
The valve is now closed.
A
B
±3
0
°
1
1
A
1
max
15
B
1
>120 mm
>500 mm
NOTICE
Pay attention that mentioned torque range is applicable for
opening Ø19.1 and Ø25.4 gas line stop valves only.
Closing direction
Liquid side
Gas side
1
Service port and service
port cover
2
Stop valve
3
Field piping connection
4
Stop valve cover
3
4
1
2
1
Service port
2
Cap
3
Hexagon hole
4
Shaft
5
Seal
1
2
3
4
5
1
2
3
4
Summary of Contents for RYYQ8T7Y1B
Page 68: ......
Page 69: ......
Page 70: ......
Page 72: ...4P329765 1 2012 09 Copyright 2012 Daikin 4P329765 1 0000000U...