Fujitsu Waterstage WOYK150LJL, Installation Manual

Page: 28 / 83

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▼ Additional filling
50 g of R410A
for every additional 1 metre
Length of the
connections
15 m 30 m max.
Additional load None 750 g
The amount needed to fill the outdoor units corresponds
to the maximum distances between the outdoor unit
and the hydraulic unit as defined here page 24 . If the
distances are greater, an additional amount of R410A
is required. For each type of appliance, this additional
amount depends on the distance between the outdoor
unit and the hydraulic unit. Any additional filling with
R410A must be carried out by an approved specialist.
• Example of additional fill:
An outdoor unit which is 17 m away from the hydraulic
unit will require an additional fill of:
Additional fill = (17 - 15) x 50 = 100 g
Filling must be carried out after creating a vacuum and
before gassing the hydraulic unit, as follows:
-Disconnect the vacuum pump (yellow hose) and
connect a bottle of R410A in its place in the fluid
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
10g. 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 fill amount, close the
bottle and disconnect it.
-Quickly disconnect the hose connected to the
appliance.
- Proceed to fill the hydraulic unit with gas.
Only use R410A !
Only use tools suitable for R410A
(set of pressure gauges).
Always fill in the liquid phase.
Never exceed the maximum length or
difference in level.
R410A
fig. 23 - Gas bottle R410A
Gas
Liquid
▼
Filling with gas
If additional filling is required, do it before
filling the hydraulic unit with gas. Refer to
paragraph "Additional filling", page 28 .
-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 an Allen (hex) key
(anti-clockwise direction) without using excessive
force against the stop.
-Quickly disconnect the hose from the
Manifold
.
- Refit the 2 original caps (be sure they are clean) and
tighten them to the recommended tightening torque
indicated in the table fig. 20, page 25 . A seal is
achieved in the caps only with metal to metal.
The outdoor unit does not contain any additional
refrigerant allowing the installation to be bled.
Bleeding by flushing is strictly forbidden.
▼
Final sealing test
The sealing test must be carried out using a certified
gas detector (sensitivity of 5g/year).
Once the refrigeration circuit has been gassed as
described above, check that all the refrigeration
connectors are gas-tight (4 connectors). If the flarings
have been made correctly, there should be no leaks.
If necessary, check the seal of the refrigeration valve
caps.
If the event of a leak:
-Return the gas to the outdoor unit (pump down).
The pressure should not drop below atmospheric
pressure (0 relative bar read on the
Manifold
) so as not
to contaminate the recovered gas with air or moisture.
-Redo the connection,
-Restart the commissioning procedure.
Waterstage / Installation / 2011 - EN