Daikin REMQ8P9Y1B, Installation Manual

Page: 25 / 36

R REMQ10~16P8 + REMHQ12P8Y1B
VRVIII System air conditioner
4PW48463-1A
Installation manual
20
4 If the calculated amount of pre-charging is reached, close
valve B.
5 After pre-charging, perform the refrigerant charge operation as
shown below and charge the remaining refrigerant of the
additional charging amount through valve A.
(See figure 24)
1. Start of automatic charging refrigerant
-
Open the liquid pipe, suction gas pipe, high pressure/low
pressure gas pipe and equalizer pipe stop valves and the
service port stop valve. (Valves A, B and C must be closed.)
- Close all front panels except the electric box front panel and
turn the power ON.
- Make sure all indoor units are connected, refer to "11.4. How
to check how many units are connected" on page 18 .
- If the H2P LED is not flashing (in 12 minutes time after
turning on the power), make sure it is displayed as shown in
the
"2 Normal system display" on page 22 .
If the H2P LED is flashing, check the malfunction code on the
remote controller
"3 Remote controller malfunction code
display" on page 22 .
2. Press the button once if the LEDs combination is not
as in the figure below.
3. Press the button once.
4. Hold the button down for 5 seconds or more.
5. Charging mode judgement
However, if the indoor temperature is 10°C DB or lower, in some
cases the unit will charge in heating mode to increase the indoor
temperature.
The unit will automatically select the cooling mode or heating
mode for charging.
■
Charging in heating mode
6. Start up
Wait while the unit is preparing for charging in heating mode.
It takes about 2 to 10 minutes for the system to become stable.
In case of a small charging amount, the system will star t charging
the refrigerant before the system reaches the stable state. It may
disturb a correct decision and may cause overcharging.
7. Ready
Press the button once within 5 minutes.
If the button is not pushed within 5 minutes,
P2
will be
displayed on the remote controller. Refer to "3 Remote controller
malfunction code display" on page 22 .
8. Operation
When the following LED display is shown, open valve A and
close the front panel. If the front panel is left open, the system
can not operate properly during the refrigerant charging.
1 Measuring instrument
2 Refrigerant tank (R410A, siphon system)
3 Charge hose
4 Equalizer pipe stop valve
5 High pressure/low pressure gas pipe stop valve
6 Suction gas pipe stop valve
7 Liquid pipe stop valve
8 Refrigerant charge port
9 Valve A
10 Valve B
11 Valve C
12 To BS unit, indoor unit
13 Stop valve
14 Service port
15 Field piping
16 Refrigerant flow when pre-charging through the liquid stop valve
service port (refer to step
3 on page 19 )
17 Refrigerant flow when automatic charging through the charge port
(refer to step
5 on page 20 )
18 The refrigerant will be charged with ±30 kg in 1 hour at an outdoor
temperature of 30°C DB (12 kg at 0°C DB). If you need to speed
up in case of a multi system, connect the refrigerant tank to each
outdoor unit.
At least the unit should be charged with its original amount
of refrigerant (refer to the nameplate on the unit), before
starting the automatic charging.
NOTE When the leak detection function is not required,
complete charging when using the previous described
method (unit is not operating) can be done.
If it is not possible to charge the entire quantity through
the service port of the liquid pipe stop valve with the
unit not operating, refer to
"14. Additional refrigerant
charging method" on page 27 .
NOTE For a multi outdoor unit system, it is not required
to connect all charge ports to a refrigerant tank.
The refrigerant will be charged with ±30 kg in
1 hour time at an outdoor temperature of 30°C DB
or with ±12 kg at an outdoor temperature of
0°C DB.
If you need to speed up in case of a multiple
outdoor system, connect the refrigerant tanks to
each outdoor unit as shown in
figure 24 .
■
If you perform the refrigerant charging operation
within the refrigerant system with one or more
units with power OFF, the refrigerant charging
operation can not be accomplished properly.
For confirming the number of outdoor units and
indoor units with power ON, refer to
"11.4. How to
check how many units are connected" on
page 18
.
In case of a multi system, turn the power ON to
all outdoor units in the refrigerant system.
■
To energize the crankcase heater, make sure to
turn the power ON at least 6
hours before
starting operation.
H1P H2P H3P H4P H5P H6P H7P
x x w x x x x
H1P H2P H3P H4P H5P H6P H7P
w w w w w w w
■
When charging in cooling mode, the unit will stop
operating when the required amount of
refrigerant is charged.
■
During charging in heating mode, a person must
manually close valve A before complete charging
is finished. The required amount is the calculated
amount (see
"6.6. Example of connection" on
page 9 ), therefore, the weight must be monitored
constantly.
H1P H2P H3P H4P H5P H6P H7P
Pressure control
(for the first minute) x c x x x x w
Start up control
(for the next 2 minutes)
c c x x x w x
Waiting for stable
heating conditions
(for the next ±15
minutes (according to
the system))
c c x x x w w
H1P H2P H3P H4P H5P H6P H7P
c c x x w x w
BS1 MODE
BS4 TEST
BS4 TEST
BS4 TEST
BS4 TEST