Connecting The Pc Configurator To The Outdoor Unit; Charging Refrigerant; Precautions; Calculating The Additional Refrigerant Charge - Daikin REYQ72TTJU Installation Manual

13 .2 .2 . Operating the DIP switches
By operating the DIP switches it is possible to:
What to do with DIP switch DS1
Cool/Heat selector (refer to the manual of the Cool/
1
Heat selector switch)
OFF=not installed=factor setting
NOT USED
2-4
DO NOT CHANGE THE FACTORY SETTING
What to do with DIP switch DS2
NOT USED
1-4
DO NOT CHANGE THE FACTORY SETTING
13 .3 . Connecting the PC configurator to the outdoor unit
Connection of the optional PC configurator cable to the outdoor unit
has to be done on A1P. Connect the EKPCCAB* cable to the 5-pin
blue connector X27A.
CAUTION
Works executed on the outdoor unit are best done under dry weather
conditions to avoid water ingress.
2
3
1
4
5

14 . Charging refrigerant

14 . 1 . Precautions

NOTE
• Refrigerant cannot be charged until field wiring has been completed.
• Refrigerant may only be charged after performing the leak test and
the vacuum drying.
• 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 R410A
is charged.
• Refrigerant containers shall be opened slowly.
• Always use protective gloves and protect your eyes when charging
refrigerant.
• When the refrigerant system is to be opened, refrigerant must be
treated according to the applicable legislation.
DANGER
See Safety considerations on page i.
• 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. See 14.2. Calculating the additional refriger-
ant charge.
• In case recharge is required, refer to the nameplate of the unit.
It states the type of refrigerant and necessary amount.
3P362438-3H English
3
2
1 PC
2 Cable (EKPCCAB*)
3 Outdoor unit main
X27A
printed circuit board
A1P

14 .2 . Calculating the additional refrigerant charge

NOTE
The refrigerant charge of the system must be less than 210 lbs.
(100 kg). This means that in case the calculated total refrigerant
charge is equal to or more than 209 lbs. (95 kg) you must divide your
multiple outdoor system into smaller independent systems, each
containing less than 209 lbs. (95 kg) refrigerant charge. For factory
charge, refer to the unit nameplate.
14 .2 . 1 . How to calculate the additional refrigerant to be charged
Additional refrigerant to be charged=R (lbs.). R should be rounded off
in units of 0.1 lbs.
× f7/8) × 0.249+(X × f3/4) × 0.175+(X
R=[(X
1 2
× 0.081+(X × f3/8) × 0.040+(X × f1/4) × 0.015] × 1.04+[A]+[B]+[C]
5 6
=Total length (ft. (m)) of liquid piping size at fa
X
1...6
* In units of 0.1 kg, additional refrigerant to be charged=R (kg).
× f22.2) × 0.37+(X × f19.1) × 0.26+(X
R=[(X
1 2
× f9.5) × 0.059+(X × f6.4) × 0.022] × 1.04+[A]+[B]+[C]
0.12+(X
5 6
Parameter [A]
Refrigerant amount for BS units
BS unit model
BS4Q54T
BS6Q54T
BS8Q54T
BS10Q54T
BS12Q54T
BSQ36T
BSQ60T
BSQ96T
Parameter [B]
Refrigerant amount for outdoor units
Outdoor unit capacity type
REYQ72T
REYQ96T
REYQ120T
REYQ144T
REYQ168T
Parameter [C]
Refrigerant amount by field piping length
and indoor units capacity
Total
Field indoor unit
Total outdoor unit capacity type
piping capacity
REYQ72-
length connection
144T
ratio
≤ 85%
< 295.3 ft.
The smaller of [D]
(90 m)
> 85%
or 5.51 lbs. (2.5 kg)
≤ 85%
≥ 295.3 ft.
(90 m)
> 85%
× f5/8) × 0.121+(X × f1/2)
3 4
× f15.9) × 0.18+(X × f12.7) ×
3 4
Refrigerant amount
0.7 lbs./unit (0.3 kg/unit)
0.9 lbs./unit (0.4 kg/unit)
1.1 lbs./unit (0.5 kg/unit)
1.5 lbs./unit (0.7 kg/unit)
1.8 lbs./unit (0.8 kg/unit)
0.1 lbs./unit (0.05 kg/unit)
0.2 lbs./unit (0.1 kg/unit)
0.4 lbs./unit (0.2 kg/unit)
Refrigerant amount
0.0 lbs./unit (0.0 kg/unit)
3.1 lbs./unit (1.4 kg/unit)
3.3 lbs./unit (1.5 kg/unit)
10.6 lbs./unit (4.8 kg/unit)
10.8 lbs./unit (4.9 kg/unit)
Refrigerant amount
REYQ168- REYQ312-
288T 456T
0.0
The smaller of [D] The smaller of [D]
or 6.61 lbs. (3.0 kg) or 7.50 lbs. (3.4 kg)
0.0
2.20 lbs. (1.0 kg)
26