Daikin VRV III RXYQ-PY1K, Installation Manual, Page: 20 / 34

Installation manual
17
RXYQ8~1 RXYQ8~12P7YLK
VRVIII System air conditioner
4PW41760-1
11.2. Stop valve operation procedure
Size of stop valve
The sizes of the stop valves connected to the system are as listed in
the table below.
Opening stop valve (See figure 14)
1. Remove the cap and turn the valve counterclockwise with the
hexagon wrench.
2. Turn it until the shaft stops.
3. Make sure to tighten the cap securely. Refer to the table below
Closing stop valve (See figure 14)
1. Remove the cap and turn the valve clockwise with the hexagon
wrench.
2. Securely tighten the valve until the shaft contacts the main body
seal.
3. Make sure to tighten the cap securely.
For the tightening torque, refer to the table above.
11.3. How to check how many units are connected
It is possible to find out how many indoor units are active and
connected by operating the push-button switch on the printed circuit
board (A1P) of the working outdoor unit. In a multiple outdoor unit
system, you can find out how many outdoor units are connected to
the system by using the same procedure.
Make sure that all the indoor units connected to the outdoor unit are
active.
Follow the 5-step procedure as explained below.
■
The LEDs on the A1P shows the operating status of the outdoor
unit and the number of indoor units that are active.
■
The number of units that are active can be read from the LED
display in the "Monitor Mode" procedure below.
Example: in the following procedure there are 22 units active:
■
Do not open the stop valve until all piping and
electrical steps of
"10. Checking of unit and
installation conditions" on page 16 are completed. If
the stop valve is left open without turning on the
power, it may cause refrigerant to build up in the
compressor, leading to insulation degradation.
■
Always use a charge hose for service port connection.
■
After tightening the cap, check that no refrigerant
leaks are present.
Type 8 10 12
Liquid line stop valve
Ø9.5
(a)
(a) The model RXYQ12 supports field piping of Ø12.7 on the accessory pipe
supplied with the unit.
Gas line stop valve Ø19.1
Ø25.4
(b)
(b) The model RXYQ10 supports field piping of Ø22.2 on the accessory pipe
supplied with the unit.
The model RXYQ12 supports field piping of Ø28.6 on the accessory pipe
supplied with the unit.
1 Service port
2 Cap
3 Hexagon hole
4 Shaft
5 Seal
Do not apply excessive force to the stop valve. Doing
so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
Stop valve size
Tightening torque N•m (Turn clockwise to close)
Shaft
Cap (valve lid) Service port Valve body
Hexagonal
wrench
Ø9.5 5.4~6.6
4 mm
13.5~16.5
11.5~13.9
Ø12.7 8.1~9.9 18.0~22.0
Ø15.9 13.5~16.5 6 mm 23.0~27.0
Ø19.1
27.0~33.0 8 mm 22.5~27.5
Ø25.4
x
OFF
w
ON
c
Blinking
NOTE Wherever during this procedure, press the
button if something becomes unclear.
You will return to setting mode 1 (H1P=
x
"OFF").
1 Setting mode 1 (default system status)
H1P H2P H3P H4P H5P H6P H7P
Default status (normal)
x x w x x x x
Press the button to switch from setting mode 1 to monitor
mode.
2 Monitor mode
H1P H2P H3P H4P H5P H6P H7P
Default status display
c x x x x x x
To check the number of indoor units, press the button 5 times
To check the number of outdoor units, p ress the button 8 times
3 Monitor mode
H1P H2P H3P H4P H5P H6P H7P
Selection status of how many
connected indoor units to
display.
c x x x w x w
OR
H1P H2P H3P H4P H5P H6P H7P
Selection status of how many
connected outdoor units to
display.
c x x w x x x
Pressing the button causes the LED display to show the
data on the number of indoor units that are connected or how many
outdoor units that are connected in a multiple outdoor unit system.
4 Monitor mode
H1P H2P H3P H4P H5P H6P H7P
Displaying the number of
connected indoor units
c x c x c c x
32 16 8 4 2 1
Calculate the number of connected indoor units by adding the values of
all (H2P~H7P) blinking (
c ) LEDs together.
In this example: 16+4+2=22 units
Press the button to return to step 1, setting mode 1
(H1P=
x
"OFF").
BS1 MODE
BS1 MODE
BS2 SET
BS2 SET
BS3 RETURN
BS1 MODE