Daikin VRV IV Q+ Series, Инструкция по установке и эксплуатации

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14 Piping installation
Installation and operation manual
25
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546221-1B – 2020.10
NOTICE
If operation is performed within 12 minutes after the indoor
and outdoor units are powered on, the compressor will not
operate before the communication is established in a
correct way between outdoor unit(s) and indoor units.
NOTICE
Before starting charging procedures, check if the
7‑segment display indication of the outdoor unit A1P PCB
is as normal (see
"To access mode 1 or 2" [
4
35]). If a
malfunction code is present, see "19.1 Solving problems
based on error codes" [
4
38].
NOTICE
Make sure all connected indoor units are recognised (see
[1‑10] in
"Mode 1: Monitoring settings" [ 4 35]).
NOTICE
Close the front panel before any refrigerant charge
operation is executed. Without the front panel attached the
unit cannot judge correctly whether it is operating properly
or not.
NOTICE
In case of maintenance and the system (outdoor unit+field
indoor units) does not contain any refrigerant any
more (e.g., after refrigerant reclaim operation), the unit has
to be charged with its original amount of refrigerant (refer
to the nameplate on the unit) by pre-charging before the
automatic charging function can be started.
NOTICE
Refrigerant can only be charged after the field wiring has
been completed.
NOTICE
When charging a system, take care that the maximum
permissible charge is never exceeded, in view of the
danger of liquid hammer.
14.4.2 About charging refrigerant
Once vacuum drying is finished, additional refrigerant charging can
start.
There are two methods to charge additional refrigerant.
Method See
Automatic charge "Step 6a: To automatically charge
refrigerant"
[
4
29]
Manual charge "Step 6b: To manually charge
refrigerant"
[
4
29]
To speed up the refrigerant charging process, it is in case of larger
systems recommended to first pre-charge a portion of refrigerant
through the liquid line before proceeding with the actual automatic or
manual charging. This step is included in below procedure (see
"To
charge refrigerant" [
4
28]). It can be skipped, but charging will take
longer then.
A flow chart is available which gives an overview of the possibilities
and actions to be taken (see
"To charge refrigerant: Flow
chart" [
4
27]).
14.4.3 To determine the additional refrigerant
amount
INFORMATION
For final charge adjustment in the test laboratory, please
contact your local dealer.
NOTICE
The refrigerant charge of the system must be less than
100 kg. This means that in case the calculated total
refrigerant charge is equal to or more than 95 kg you must
divide your multiple outdoor system into smaller
independent systems, each containing less than 95 kg
refrigerant charge. For factory charge, refer to the unit
name plate.
Formula:
R=[(X
1
× Ø22.2 )×0.37+(X
2
× Ø19.1 )×0.26+(X
3
× Ø15.9 )×0.18+
(X
4
× Ø12.7 )×0.12+(X
5
× Ø9.5 )×0.059+(X
6
× Ø6.4 )×0.022]+A+C
R Additional refrigerant to be charged [in kg and rounded off
to 1 decimal place]
X
1...6
Total length [m] of liquid piping size at Øa
A, C Parameters A and C (see tables below)
▪ Parameter A:
Parameter A
(a)
Piping length
(b)
CR A
8 HP 10~14 HP 16~20 HP
≤30 m 50%≤CR≤105% 0 kg 0.5 kg
105%<CR≤130% 0.5 kg 1.0 kg
>30 m 50%≤CR≤70% 0 kg 0.5 kg
70%<CR≤85% 0.3 kg 0.5 kg 1.0 kg
85%<CR≤105% 0.7 kg 1.0 kg 1.5 kg
105%<CR≤130% 1.2 kg 1.5 kg 2.0 kg
(a) In case of a multi-outdoor-unit system, add the sum of the
individual outdoor unit charge factors.
(b) Piping length is considered the distance from the outdoor
unit to the farthest indoor unit
CR Total indoor unit capacity connection ratio
▪ Parameter C:
Parameter C
(a)
Model CR≥100% CR<100%
If Then If Then
8 HP N≥4 C=N×0.1 kg N<4 C=0 kg C=0 kg
10 HP N≥5 N<5
12 HP N≥6 N<6
14 HP N≥7 N<7
16 HP N≥8 N<8
18 HP N≥9 N<9
20 HP N≥10 N<10
(a) In case of a multi-outdoor-unit system, add the sum of the
individual outdoor unit charge factors.
CR Total indoor unit capacity connection ratio
N Number of VRV DX and RA DX indoor units connected to
the outdoor unit
Parameter C – Example with multiple outdoor units:
550
200 300
125 125 125 125 50
500
12 HP 8 HP
# Action
1 Determine the connection ratio:
▪ Total outdoor unit capacity class = 500
▪ Total indoor unit capacity class = 550
=> CR≥100%