8 Finishing the outdoor unit installation
Installation manual
14
AZAS100~140MUV/Y
Sky Air Active-series
4P743507-1 – 2023.08
7.3.3
Charging refrigerant: Setup
See
"5.2.1 Checking refrigerant piping: Setup"
9].
7.3.4
To completely recharge refrigerant
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
Prerequisite:
Before completely recharging refrigerant, make sure
the system is pumped down, the outdoor unit's
external
refrigerant
piping is checked (leak test, vacuum drying) and vacuum drying on
the outdoor unit's
internal
refrigerant piping is performed.
1
If not already done (for vacuum drying of the unit), activate the
vacuum mode (see
"7.3.2 To activate/deactivate the vacuum
13])
2
Connect the refrigerant cylinder to the service port of the liquid
stop valve.
3
Open the liquid stop valve.
4
Charge the complete refrigerant amount.
5
Deactivate the vacuum mode (see
the vacuum mode field setting"
13]).
6
Open the gas stop valve.
7.4
To fix the fluorinated greenhouse
gases label
1
Fill in the label as follows:
a
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO
2
eq
GWP × kg
1000
=
=
+
kg
=
kg
=
GWP: XXX
RXXX
e
b
c
d
a
Factory refrigerant charge: see unit name plate
b
Additional refrigerant amount charged
c
Total refrigerant charge
d
Quantity of fluorinated greenhouse gases
of the total
refrigerant charge expressed as tonnes CO
2
equivalent.
e
GWP = Global Warming Potential
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge
label.
2
Fix the label on the inside of the outdoor unit. There is a
dedicated place for it on the wiring diagram label.
8
Finishing the outdoor unit
installation
8.1
To insulate the refrigerant piping
After finishing the charging procedure, the piping must be insulated.
Take into account the following points:
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam which
can withstand a temperature of 120°C for gas piping.
▪ Reinforce the insulation on the refrigerant piping according to the
installation environment.
Ambient
temperature
Humidity
Minimum thickness
≤30°C
75% to 80% RH
15 mm
>30°C
≥80% RH
20 mm
Between outdoor and indoor unit
1
Insulate and fix the refrigerant piping and cables as follows:
g
b
a
f
e
c
d
a
Gas pipe
b
Gas pipe insulation
c
Interconnection cable
d
Field wiring (if applicable)
e
Liquid pipe
f
Liquid pipe insulation
g
Finishing tape
2
Install the service cover.
2×
2
2
1
8.2
To check the insulation resistance
of the compressor
NOTICE
If, after installation, refrigerant accumulates in the
compressor, the insulation resistance over the poles can
drop, but if it is at least 1 MΩ, then the unit will not break
down.
▪ Use a 500 V mega-tester when measuring insulation.
▪ Do NOT use a mega-tester for low voltage circuits.
1
Measure the insulation resistance over the poles.
If
Then
≥1 MΩ
Insulation resistance is OK. This procedure is
finished.
<1 MΩ
Insulation resistance is not OK. Go to the next step.
