Daikin REYA28A7Y1B handleiding
Handleiding
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16 Charging refrigerant
Installation and operation manual
32
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P684060-1C – 2024.10
NOTICE
Before starting charging procedures, check if the
7‑segment display indication of the outdoor unit A1P PCB
is as normal (see "18.1.4To access mode 1 or 2" [441]).
If a malfunction code is present, see "22.1 Solving
problems based on error codes"[447].
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 +
BSunit + fieldpiping + indoorunits) 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)
and the determined additional refrigerant amount.
NOTICE
▪ Ensure that contamination of different refrigerants does
not occur when using charging equipment.
▪ Charging hoses or lines shall be as short as possible to
minimise the amount of refrigerant contained in them.
▪ Cylinders shall be kept in an appropriate position
according to the instructions.
▪ Ensure that the refrigerating system is earthed prior to
charging the system with refrigerant. See "17Electrical
installation"[436].
▪ Label the system when charging is complete.
▪ Extreme care shall be taken not to overfill the
refrigerating system.
NOTICE
Prior to charging the system, it shall be pressure tested
with the appropriate purging gas. The system shall be leak
tested on completion of charging but prior to
commissioning. A follow up leak test shall be carried out
prior to leaving the site.
16.2 About charging refrigerant
Once vacuum drying and leak test are finished, additional refrigerant
charging can start.
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 charging.
This step is included in below procedure (see "16.5 To charge
refrigerant" [4 34]). 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 "16.4 To charge refrigerant: Flow
chart"[434]).
16.3 To determine the additional
refrigerant amount
WARNING
The maximum indoor capacity index which can be
connected to a BS unit port is determined based on the
smallest room served by that port.
In case the system serves the lowest underground floor of
a building, there is an extra limit to the maximum allowable
total refrigerant amount. This maximum refrigerant amount
is determined based on the area of the smallest room on
the lowest underground floor.
See "13 Special requirements for R32 units" [4 17] to
determine the maximum allowable total refrigerant amount.
INFORMATION
For final charge adjustment in the test laboratory, please
contact your local dealer.
INFORMATION
Note down the amount of additional refrigerant that is
calculated here, for later use on the additional refrigerant
charge label. See "16.8To fix the fluorinated greenhouse
gases label"[435].
NOTICE
The refrigerant charge of the system must be less than
63.8 kg. This means that in case the calculated total
refrigerant charge is equal to or more than 63.8 kg you
must divide your multiple outdoor system into smaller
independent systems, each containing less than 63.8 kg
refrigerant charge. For factory charge, refer to the unit
name plate.
NOTICE
The total refrigerant charge amount in the system MUST
always be lower than 63.8kg.
Formula:
R=[(X
1
×Ø19.1)×0.23+(X
2
×Ø15.9)×0.16+(X
3
×Ø12.7)×0.10+
(X
4
×Ø9.5)×0.053+(X
5
×Ø6.4)×0.020]×1.04+(A+B+C)
R Additional refrigerant to be charged [kg] (rounded off to
one decimal place)
X
1...5
Total length [m] of liquid piping size at Øa
A~C Parameters A~C (see below)
INFORMATION
▪ In case of a multi-outdoor-unit system, add the sum of
the individual outdoor unit charge factors.
▪ When using more than one BS unit, add the sum of the
individual BS unit charge factors.
▪ Parameter A: If the total indoor unit capacity connection ratio
(CR)>100%, charge an additional 0.5kg of refrigerant per outdoor
unit.
▪ Parameter B: Outdoor unit charge factors
Model Parameter B
REMA5 0kg
REYA8~12
REYA14 1.2kg
REYA16 1.3kg
REYA18 4.3kg
REYA20
▪ Parameter C: Individual BS unit charge factors
Model Parameter C
BS4A 0.7kg
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Productinformatie
| Merk | Daikin |
| Model | REYA28A7Y1B |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10147 MB |
