Atlantic WOYG112LHT, Installation And Commissioning Instructions

Page: 30 / 92

3 .4 .3 Filling the installation with gas
If an additional charge is requires, add the
additional charge before filling the hydraulic unit
with gas. Please refer to the para . "Additional
charge", page 30 .
- Remove the access plugs ( A ) from the valve controls.
- First of all fully open the "Liquid" valve (small)
and then the "Gas" valve (large) using a hex key
(counterclockwise direction) without forcing
excessively against the stop.
- Remove the hose rapidly to the
Manifold
- Refit the 2 original caps (be sure they are clean) and
tighten them to the recommended tightening torque
( figure 25, page 26) . The sealing is performed in the
caps only metal to metal.
The outdoor unit does not contain any additional
refrigerant, enabling the installation to be purged.
Flushing is strictly forbidden.
3 .4 .4 Sealing test
The sealing test must be performed with a certified gas
detector (sensitivity 5g/year).
Once the refrigerant circuit has been gassed as
described above, check that all the refrigerant connectors
are gas-tight (4 connectors). If the flarings have been
made correctly, there should be no leaks. Eventually,
check the tightness of the refrigerant valves caps.
"
If there is a leak:
- Bring the gas into the outdoor unit (pump down).
The pressure should not drop below atmospheric
pressure (0 bar to read on
Manifold
) so as not to
contaminate the recovered gas with air or moisture.
- Make the connection again.
- Repeat the commissioning procedure.
figure 28 - Gas bottle R410A
R410A
Gas
Liquid
3 .4 .5 Additional charge
50 g of R410A
per additional meter
Length of
the connections
15 m 20 m max.
Additional charge None 250 g
The charge in the outdoor units corresponds to the
maximum distances between the outdoor unit and the
hydraulic unit defined in page 29 . If the distances
are greater, an additional charge of R410A is required.
The additional charge depends on the distance
between the outdoor unit and the hydraulic unit for
each type of appliance. The additional charge of R410A
must necessarily be made by an approved refrigerant
engineer
• Example of additional charge :
An outdoor unit 17 m away from the hydraulic unit will
require an additional charge of :
Additional charge = (17 - 15) x 50 = 100 g.
The charge must be introduced after creating the
vacuum and before the hydraulic unit is filled with gas,
as follows :
- Disconnect the vacuum pump (yellow hose) and
connect a bottle of R410A instead in the liquid
extraction position
- Open the bottle’s valve.
- Bleed the yellow hose by loosening it slightly on the
Manifold side.
- Place the bottle on scales with a minimum accuracy
of 10 g. Note the weight.
- Carefully open the blue valve slightly and check the
value shown on the scales.
- As soon as the value displayed has dropped by the
value for the calculated additional charge, close the
bottle and disconnect it.
- Then rapidly disconnect the hose connected to the
appliance
- Proceed to fill the hydraulic unit with gas.
"
Warning
• Only use R410A !
• Only use tools suitable for R410A
(set of manometers).
• Always charge in the fluid phase.
• Never exceed the length or the maximum difference
in level.
Installation and commissioning instructions "1485 - EN"
Heat pump alféa hybrid duo gas
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