Installer reference guide
33
08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
7 Installation
7.4.12 To perform vacuum drying
Connect the vacuum pump and manifold as follows:
1
Vacuum the system until the pressure on the manifold indicates
–0.1 MPa (–1 bar).
2
Leave as is for 4-5 minutes and check the pressure:
3
Evacuate for at least 2 hours to a pressure on the manifold of –
0.1 MPa (–1 bar).
4
After turning OFF the pump, check the pressure for at least
1 hour.
5
If you do NOT reach the target vacuum or cannot maintain the
vacuum for 1 hour, do the following:
7.4.13 To determine the additional refrigerant
amount
7.4.14 To calculate the complete recharge amount
7.4.15 To charge refrigerant
Other guidelines:
Q
Only use tools exclusively for R410A to ensure pressure
resistance and to prevent foreign materials from entering into
the system.
Q
Check whether the refrigerant cylinder is equipped with a siphon
tube (the marking "liquid filling siphon attached" should be
present).
Q
Open refrigerant cylinders slowly.
Q
Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
1
Connect the refrigerant cylinder to the service port.
2
Charge the additional refrigerant amount.
3
Open the gas stop valve.
If pump down is needed in case of dismantling or relocate the
system, see "13.1 To pump down" on page 71 for more details.
7.4.16 To fix the fluorinated greenhouse gases
label
1
Fill in the label as follows:
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
a
Pressure meter
b
Gauge manifold
c
Low-pressure valve (Lo)
d
High-pressure valve (Hi)
e
Charging hoses
f
Vacuum pump
g
Service port
h
Valve lids
i
Gas stop valve
j
Liquid stop valve
If the pressure…
Then…
Does not change
There is no moisture in the
system. This procedure is
finished.
Increases
There is moisture in the
system. Go to the next step.
Q
Check for leaks again.
Q
Perform vacuum drying again.
NOTICE
Be sure to open the gas stop valve after piping installation
and vacuuming. Running the system with the valve closed,
the compressor may break down.
If the total liquid piping length
is…
Then…
≤
10 m
Do NOT add additional
refrigerant.
>10 m
Add 20 g refrigerant per extra
meter (above 10 m).
INFORMATION
If a complete recharge is necessary, the total refrigerant
charge is: the factory refrigerant charge (see unit name
plate) + the determined additional amount.
a
d
j
b
f
e
c
g h i
h
WARNING
Q
Only use R410A as refrigerant. Other substances may
cause explosions and accidents.
Q
R410A contains fluorinated greenhouse gases
covered by the Kyoto Protocol. Its global warming
potential value is 1975. Do NOT vent these gases into
the atmosphere.
Q
When charging refrigerant, always use protective
gloves and safety glasses.
CAUTION
Do NOT charge the refrigerant more than the specified
amount, to avoid compressor breakdown.
Charge the liquid
refrigerant with the
cylinder in upright
position.
Charge the liquid
refrigerant with the
cylinder in up-side-down
position.
NOTICE
National implementation of EU regulation on certain
fluorinated greenhouse gases may require to provide the
appropriate official language on the unit. Therefore, an
additional multilingual fluorinated greenhouse gases label
is supplied with the unit.
a
From the multilingual fluorinated greenhouse gases label
peal off the applicable language and stick it on top of
a
.
b
Factory refrigerant charge: see unit name plate
c
Additional refrigerant amount charged
d
Total refrigerant charge
d
c
b
a
