Additional Refrigerant Charge - Panasonic U-5MX3XPQB Manual De Instalación

Opening stop valve
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, as the valve is not a backseat type. Always use the
special tool.
3. Make sure to tighten the cap securely.
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 below.
Tightening torque N•m (Turn clockwise to close)
stop
valve
size Shaft (valve body) (valve lid)
Ø9.5 5.4~6.6 Hexagonal 13.5~16.5
wrench
Ø12.7 8.1~9.9 18~22
4 mm
Hexagonal
Ø15.9 13.5~16.5 wrench 23~27
6 mm
Ø22.2 Hexagonal
27~33 wrench 36~44
Ø25.4
10 mm
(See figure 21)
1 Service port
2 Cap
3 Hexagon hole
4 Shaft
5 Seal
CAUTION
Always use a charge hose for service port connection.
After tightening the cap, check that no refrigerant leaks are
present.

6.8. Additional refrigerant charge

Refrigerant cannot be charged until field wiring has been
completed.
Refrigerant may only be charged after performing the leak
test and the vacuum drying (see above).
When charging a system, care shall be taken that its
maximum permissible charge is never exceeded, in view of
the danger of liquid hammer.
Charging with an unsuitable substance may cause
explosions and accidents, so always ensure that the
appropriate refrigerant (R-410A) is charged.
Refrigerant containers shall be opened slowly.
Always use protective gloves and protect your eyes when
charging refrigerant.
See figure 9.
1 Presssure reducing valve
2 Nitrogen
3 Tank
4 Siphon system
5 Measuring instrument
6 Vacuum pump
7 Valve A
Installation manual
11
Gas line
piping
Cap Service attached
port Flare nut to unit
33~39
50~60
—
11.5~13.9 62~75
— 22~28
8 Gas line stop valve
9 Liquid line stop valve
10 stop valve service port
11 Charge hose
12 Indoor unit
13 Outdoor unit 14 Dotted lines represent on site piping
15 To indoor unit
To avoid compressor breakdown. Do not charge the refrigerant
more than the specified amount.
This outdoor unit is factory charged with refrigerant and
depending on pipe sizes and pipe lengths some systems require
additional charging of refrigerant. (Refer to "How to calculate the
additional refrigerant to be charged" on page 9).
Make sure to use installation tools you exclusively use on
R-410A installations to withstand the pressure and to prevent
foreign materials from mixing into the system.
Charge the refrigerant to the liquid pipe in its liquid state. Since
R-410A is a mixed refrigerant, its composition changes if
charged in a state of gas and normal system operation would no
longer be assured.
Before filling, check whether the tank has a siphon attached or
not.
How to fill a tank with a siphon attached
Fill with the tank upright.
There is a siphon tube inside, so there is no need to
turn the tank upside-down.
Other ways of filling the tank
Fill with the tank upside-down.
Determine the weight of refrigerant to be charged additionally
referring to the item "Additional refrigerant charge" in "How to
calculate the additional refrigerant to be charged" on page 9 and
fill in the amount in the "Additional refrigerant charge label"
attached to the unit.
Charging while the outdoor unit is at standstill
After the vacuum drying is finished, charge the additional
refrigerant in its liquid state through the liquid stop valve service
port taking into account following instructions:
- Check that gas and liquid stop valves are closed.
- Stop the compressor and charge the specified weight of
refrigerant.
If the total refrigerant cannot be charged while the outdoor
unit is at standstill, it is possible to charge the refrigerant by
operating the outdoor unit using the refrigerant charge
function (refer to "Setting mode 2" on page 18).
Charging while the outdoor unit is operating
1 Completely open the gas line stop valve.
Valve A must be left fully closed.
Make sure the liquid stop valve is totally shut. If it is open, the
refrigerant cannot be charged.
Charge the additional refrigerant in its liquid state through the
service port of the liquid line stop valve.
2 While the unit is at standstill and under setting mode 2 (refer to
8.2. Checks before initial start-up, "Setting the mode" on
page 17), set the required function A (additional refrigerant
charging operation) to
ON
blinking H2P led indicates test operation and the remote
controller indicates
control).
(ON). Then operation starts. The
(test operation) and (external
U-5~48MX3XPQB
Urban Multi air conditioner
4PW21867-1A