Refrigerant Piping Work - Daikin RXP50K3V1B Installation Manual

Outdoor Unit Installation
6.
Refilling the refrigerant
Check the type of refrigerant to be used on the machine nameplate.
Fill from the gas pipe in liquid form.
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases.
Do not vent gases into the atmosphere.
R32
Refrigerant type:
(1) 675
GWP value:
Please fill in with indelible ink,
the factory refrigerant charge of the product,
the additional refrigerant amount charged in the field and
the total refrigerant charge
tCO eq calculation according to the formula (rounded up
2
to 2 decimal places)
on the refrigerant charge label supplied with the product.
NOTE
National implementation of EU regulation on certain fluorinated greenhouse gases may require to provide the appropriate official national language on the unit.
Therefore an additional multilingual fluorinated greenhouse gases label is supplied with the unit. Sticking instructions are illustrated on the backside of that label.
NOTICE
In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO
is used to determine the maintenance intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge label. This GWP value is based on the 4th IPCC Assessment
Report. The GWP value mentioned in the manual might be outdated (i.e., based on the 3rd IPCC Assessment Report).
7.

Refrigerant piping work

7-1 Cautions on pipe handling
1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender
for bending.
7-2 Selection of copper and heat insulation materials
When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045kcal/(mh •°C))
Refrigerant gas pipe's surface temperature reaches 110°C max.
Choose heat insulation materials that will withstand this temperature.
2) Be sure to insulate both the gas and liquid piping and to provide insulation
dimensions as below.
Gas side
O.D. 12.7mm
Minimum bend radius
40mm or more
Thickness 0.8mm (C1220T-O)
3) Use separate thermal insulation for gas and liquid refrigerant pipes.
NOTE
Piping and other pressure-containing parts shall comply with the applicable legislation and shall be suitable
for the used refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant.
English
(1)
GWP = global warming potential
Liquid side
O.D. 6.4mm
30mm or more
The filled out label must be adhered in the
proximity of the product charging port
(e.g. onto the inside of the stop valve cover).
Contains fluorinated greenhouse gases
1
GWP: 675
2
2
1
1 + 2
GWP × kg
1000
5 6
Gas pipe Liquid pipe
thermal insulation thermal insulation
I.D. 14-16mm I.D. 8-10mm
Thickness 10mm Min.
factory refrigerant charge of the
product:
see unit name plate
additional refrigerant amount
charged in the field
total refrigerant charge
= kg
greenhouse gas emissions of the
total refrigerant charge expressed
=
kg
as tonnes CO
refrigerant cylinder and manifold
for charging
kg
=
outdoor unit
=
tCO eq
2
Be sure to
place a cap.
Rain
If no flare cap is
available, cover the
flare mouth with
tape to keep dirt
or water out.
Gas pipe
Gas pipe
insulation
Finishing tape
-equivalent
2
-equivalent)
2
Wall
Inter-unit wire
Liquid pipe
Liquid pipe
insulation
Drain hose
8