Charging Method; Checks After Adding Refrigerant - Daikin KHRQ23M29H Installationsanleitung

Charging method

As explained during vacuum drying method, once vacuum drying is
finished, additional refrigerant charging can start.
Follow the steps as described below.
1 Calculate the amount of refrigerant to be added using the
formula mentioned in
refrigerant charge" on page 23.
The first 10 kg of refrigerant can be charged without outdoor unit
operation. If the additional refrigerant amount is smaller than
10 kg, perform the precharging procedure as explained in step 2
below. If the additional refrigerant charge is larger than 10 kg,
perform step 2 and perform step 3 till the end of the procedure.
2 Precharging can be done without compressor running by
connecting the refrigerant bottle only to the liquid stop valve.
Make sure that the stop valves are closed:
7
8
11
1
3
2 4 5
1 Pressure reducing valve
2 Nitrogen
3 Refrigerant R410A tank (siphon system)
4 Measuring instrument
5 Vacuum pump
6 Suction pipe stop valve
7 Outdoor unit
8 Liquid pipe stop valve
9 Indoor unit HXHD125
10 Charge hose
11 Refrigerant charge port
12 HP/LP gas pipe stop valve
13 Other indoor unit
BS Branch selector box
Valve
Stop valve service port
3 If the total amount of refrigerant could not be charged by
precharging, then connect the refrigerant bottle to the refrigerant
charging port as described in the figure above.
4 Make sure to open all 3 stop valves of the outdoor unit (refer to
"How to use the stop valve" on page 16).
5 Turn on the power of the indoor units and outdoor unit.
Take all the precautions mentioned in "14. Start-up and
configuration" on page 25 into account.
To be able to do this operation, the outdoor unit should be set in
mode 2. Refer to "Field settings by push buttons" on page 26 for
further explanation on how to do the necessary settings.
6 Push the BS1 MODE button for 5 sec, the H1P LED is on
7 Push the BS2 SET button 20 times until following LED
combination is reached:
H1P H2P H3P H4P H5P H6P H7P
w x w x w x x
8 Push the BS3 RETURN button to confirm setting 2-20 above.
REYAQ10~16P7Y1B
VRVIII system outdoor unit
4PW62582-1A – 08.2011
"13.3. Calculating the additional
6
12
12
13 13
9
BS
8
w
9 Push the BS2 SET button to change the charge mode from OFF
(OFF) to ON (ON). LED indication should change as follows
OFF
ON
10 Push the BS3 RETURN button and the setting is defined.
11 Push the BS3 RETURN button again, and the refrigerant
charging operation will start.
12 After charging the specified quantity of refrigerant, press the
BS3 RETURN button to stop the operation.
INFORMATION
The operation will automatically stop within 30 minutes. If
charging is not completed after 30 minutes, perform the
additional refrigerant charging operation again.

Checks after adding refrigerant

Are the stop valves for liquid, HP/LP, and suction open?
Is the amount of refrigerant, that has been added, recorded on
the refrigerant charge label?
BS
NOTICE
Make sure to open the stop valves after charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
.
H1P H2P H3P H4P H5P H6P H7P
w x x x x x c
(a)
w x x x x c x
(a) This setting = factory setting
Installation manual
24