Daikin VRV W T-series - Enabling or disabling the off timer; Maintenance Information; Displaying the service contact and model information

5 Installation
Installation manual
26
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
5.6.2 Charging refrigerant
The outside unit is factory charged with refrigerant, but depending on
the field piping you have to charge additional refrigerant.
Make sure the outside unit's external refrigerant piping is checked
(leak test, vacuum drying).
Charging additional refrigerant typically consists of the following
stages:
1 Determining how much you have to charge additionally.
2 Charging additional refrigerant (pre-charging and/or charging).
5.6.3 To determine the additional refrigerant
amount
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 module system into
smaller independent systems, each containing less than
209 lbs (95 kg) refrigerant charge. For factory charge, refer
to the unit name plate.
In case of heat pump mode
Formula:
R=[(X
1
×Ø7/8)×0.249+(X
2
×Ø3/4)×0.175+(X
3
×Ø5/8)×0.121+
(X
4
×Ø1/2)×0.081+(X
5
×Ø3/8)×0.040+(X
6
×Ø1/4)×0.015]+[B]
R Additionalrefrigeranttobecharged[inlbsandroundedoff
to1decimalplace]
X
1...6
Totallength[ft]ofliquidpipingsizeatØa
B Parameter[B]
C Parameter[C]
* In units of 0.1 kg, additional refrigerant to be charged=R (kg).
R=[(X1 × Φ22.2) × 0.37+(X2 × Φ19.1) × 0.26+(X3 × Φ15.9) × 0.18+(X4 ×
Φ12.7)×0.12+(X5×Φ9.5)×0.059+(X6×Φ6.4)×0.022]+[B]
In case of heat recovery mode
Formula:
R=[(X
1
×Ø7/8)×0.249+(X
2
×Ø3/4)×0.175+(X
3
×Ø5/8)×0.121+
(X
4
×Ø1/2)×0.081+(X
5
×Ø3/8)×0.040+(X
6
×Ø1/4)×0.015]×1.04+[A]+[B]
R Additionalrefrigeranttobecharged[inlbsandroundedoff
to1decimalplace]
X
1...6
Totallength[ft]ofliquidpipingsizeatØa
A Parameter[A]
B Parameter[B]
C Parameter[C]
* In units of 0.1 kg, additional refrigerant to be charged=R (kg).
R=[(X1 × Φ22.2) × 0.37+(X2 × Φ19.1) × 0.26+(X3 × Φ15.9) × 0.18+(X4 ×
Φ12.7)×0.12+(X5×Φ9.5)×0.059+(X6×Φ6.4)×0.022]×1.04+[A]+[B]
Parameter A. When using more than one multi branch selector unit,
add the sum of the individual branch selector unit charge factors.
Model Parameter [A]
BSQ36T 0.1 lbs/unit (0.05 kg/unit)
BSQ60T 0.2 lbs/unit (0.1 kg/unit)
BSQ96T 0.4 lbs/unit (0.2 kg/unit)
BS4Q54T 0.7 lbs/unit (0.3 kg/unit)
BS6Q54T 0.9 lbs/unit (0.4 kg/unit)
BS8Q54T 1.2 lbs/unit (0.5 kg/unit)
BS10Q54T 1.6 lbs/unit (0.7 kg/unit)
BS12Q54T 1.8 lbs/unit (0.8 kg/unit)
Parameter B. If the total indoor unit capacity connection ratio>85%,
charge an additional refrigerant.
Field
piping
length
Parameter [B]
Total
indoor unit
capacity
connection
ratio
Refrigerant amount
Total outside unit capacity type
RWEQ72-
144T type
RWEQ168-
288T type
RWEQ312-
432T type
<295.3 ft
(90 m)
≤85% 0.0
>85%
The smaller
of[C]or5.51
lbs. (2.5 kg)
The smaller
of[C]or6.61
lbs. (3.0 kg)
The smaller
of[C]or7.50
lbs. (3.4 kg)
≥295.3ft
(90 m)
≤85% 0.0
>85% 2.20 lbs. (1.0 kg)
INFORMATION
Piping length is considered by the distance from the
outside unit to the farthest indoor unit.
Parameter [C]
Indoor unit
capacity
type
FXMQ type
07 09 12 15 18 24 30 36 48 54
Refrigerant
amount (lbs.
(kg)/unit)
0.06
(0.03)
0.03
(0.014)
0.14
(0.06)
0.29
(0.13)
0.25
(0.11)
0.16
(0.07)
0.33
(0.15)
0.25
(0.11)
0.08
(0.04)
0.00
(0.00)
Indoor unit
capacity
type
FXFQ type
Others
07 09 12 15 18 24 30 36 48
Refrigerant
amount (lbs.
(kg)/unit)
0.36
(0.16)
0.33
(0.15)
0.30
(0.14)
0.26
(0.12)
0.61
(0.28)
0.53
(0.24)
0.61
(0.28)
0.53
(0.24)
0.36
(0.16)
0.00
(0.00)
Connection ratio requirements. When selecting indoor units, the
connection ratio must comply with the requirements shown in "3.5.2
Connection Ratio" on page 8. For more information, see the
technical engineering data.