Precautions When Adding R410A; Stop Valve Operation Procedure; How To Check How Many Units Are Connected - Daikin REMQ8P9Y1B Installation Manual

The filled out label must be adhered on the inside of the product and
in the proximity of the product charging port (e.g. on the inside of the
service cover).
6 5
(2)
In case of multiple outdoor systems, only 1 label must be adhered,
mentioning the total factory refrigerant charge of all outdoor units
connected on the refrigerant system.
NOTE National implementation of EU regulation on certain
fluorinated greenhouse gases may require to provide
the appropriate official national language on the unit.
Therefore, an
greenhouse gases label is supplied with the unit.
Sticking instructions are illustrated on the backside of
that label.

11.2. Precautions when adding R410A

Be sure to charge the specified amount of refrigerant in liquid state to
the liquid pipe.
Since this refrigerant is a mixed refrigerant, adding it in gas form may
cause the refrigerant composition to change, preventing normal
operation.
Before charging, check whether the refrigerant cylinder is
equipped with a siphon tube or not.
Charge the liquid
refrigerant with the
cylinder in upright
position.
Be sure to use tools exclusively for R410A to ensure required
pressure resistance and to prevent foreign materials from mixing
into the system.
Charging with an unsuitable substance may cause
explosions and accidents, so always make sure that the
appropriate refrigerant (R410A) is charged.
Refrigerant containers must be opened slowly.

11.3. 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.
Type of stop valve 8 Hp
Liquid pipe
Suction gas pipe
HP/LP gas pipe
Equalizer pipe
(a) The 12 Hp model supports field piping of Ø12.7 on the accessory pipe supplied
with the unit.
(b) The 8 and 10 Hp models support field piping of Ø22.2 on the accessory pipe
supplied with the unit.
The 12~16 Hp models support field piping of Ø28.6 on the accessory pipe
supplied with the unit.
(c) The 14 and 16 Hp models support field piping of Ø22.2 on the accessory pipe
supplied with the unit.
REMQ8P9 + REMQ10~16P8 + REMHQ12P8Y1B
VRVIII System air conditioner
4PW48463-1A
1 factory refrigerant charge
4
of the product:
see unit name plate
1
2 additional refrigerant
amount charged in the
2
field
3 total refrigerant charge
3
4 contains fluorinated
greenhouse gases
covered by the Kyoto
Protocol
5 outdoor unit
6 refrigerant cylinder and
manifold for charging
additional multilingual fluorinated
Charge the liquid
refrigerant with the
cylinder in up-side-down
position.
10 Hp 12 Hp 14 Hp
(a)
Ø9.5 Ø12.7
(b)
Ø25.4
(c)
Ø19.1
Ø19.1
Do not open the stop valve until all piping and
electrical
installation conditions" on page 17
the stop valve is left open without turning on the
power, it may cause refrigerant to build up in the
(2)
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.
Opening stop valve
1 Service port
2 Cap
3 Hexagon hole
4 Shaft
5 Seal
1. Remove the cap and turn the valve counterclockwise with the
hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the stop valve. Doing
so may break the valve body.
3. Make sure to tighten the cap securely. Refer to the table below
Stop valve size
Ø9.5
Ø12.7
Ø22.2
Ø25.4
Closing stop valve
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.

11.4. 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.
x
OFF
16 Hp
The number of units that are active can be read from the LED
display in the "Monitor Mode" procedure below.
steps of "10. Checking
(See figure 13)
Tightening torque N•m (Turn clockwise to close)
Shaft
Hexagonal
Valve body wrench Cap (valve lid)
5.4~6.6 13.5~16.5
4 mm
8.1~9.9 18.0~22.0
27.0~33.0 8 mm 22.5~27.5
(See figure 13)
w
ON
of unit and
are completed. If
Service port
11.5~13.9
c
Blinking
Installation manual
18