7
4.2 - REFRIGERANT CONNECTIONS
A
B
Outdoor unit
Internal unit
Oil trap
4.2.2 - CONNECTION TO THE INDOOR UNIT
• According to the direction of the outlet chosen, break one of the covers. Protect the point where the pipes go through the sheet
section with the rubber membrane supplied or the rubber profile supplied. For the side outlets, the membrane has to be cut
in two.
Tightening torque
1.5 to 2 kgf-m
3 kgf-m
5 kgf-m
6.5 kgf-m
Dia. of pipes
1/4"
3/8"
1/2"
5/8"
4.2.1 - INSULATION OF PIPES
• Insulate the 2 pipes separately.
• Use polyethylene sheathing at least 8 mm thick.
• Pay particular attention to water entering along the pipes through the wall.
• Connect the gas and liquid pipes on the corresponding Flare connectors.
• Tighten by hand.
• Tighten using torque wrenches (see tightening torque in the table opposite).
• IMPORTANT NOTE: hold the FLARE fitting with a counter-key.
Addition of
refrigerant
above
(m)
Maxaximum
permissible
difference in
level B (m)
Maximum
permissible
length
A (m)
Liquid
Gas
Dia. of pipes
Quantity of
refrigerant to
be added
(g/m)
Refrigerant
load
in the GRV
(g)
• For connecting lengths greater than 20 m, please contact us.
• If the difference in level is greater than 3 metres, make an oil trap.
NOTE:
The nominal capacity of the units is given for a total length of 8 m.
APPLIANCES FILLED WITH R 407 C
R 407 C
• Fluid R 407 C, as opposed to R22, is not a pure fluid
but a blend composed of:
- 23% R 32 + 25% R 125 + 52% R 134 A.
• The compressors approved for operation with this
fluid are filled beforehand with polyalcohol oil.
Contrary to mineral oil, it is very hygroscopic: it
absorbs the humidity of the ambient air very quickly.
This can modify its lubricant properties and lead in
time to the destruction of the compressor.
MAINTENANCE INSTRUCTIONS
1 - Never add oil to the appliance; the compressor is
filled with polyalcohol oil, a special oil which cannot
tolerate the presence of other oils.
2 - The instruments used for:
- filling,
- pressure measurements,
- emptying under vacuum,
- recovering the fluid,
must be compatible and only used for the R 407 C
fluid.
3 - The weight of the refrigerant contained in the
storage bottle must be checked constantly. Do not
use it from the moment the remaining weight is less
than 10% of the total weight.
4 - In the case of a new charge:
- do not use the charging cylinder,
- use a balance and a dip pipe type R 407 C cylinder,
- charge the weight of R 407 C as per the value
indicated on the unit’s identification plate (for “split
systems”, refer to the installation instructions as the
charge must consider the length of the connecting
lines),
- IMPORTANT: see paragraph 3.
5 - The charge must be undertaken in liquid phase.
6 - In case of leakage, do not complete the charge:
recover the remaining refrigerant for recycling and
perform a total charge.
Recovery, recycling or the destruction of the fluid must
be done in compliance with the laws in force in the
country concerned.
7 - If the refrigerant circuit is opened, you must:
- avoid the entry of air into the circuit as much as
possible,
- replace the filter drier,
- perform the “vacuum operation” at a minimum level
of 0.3 mbar (static).
1/2"
5/8"
CSCV 175 L
CSCV 225 L
1/4"
1/4"
25
25
20
30
7
7
1 660 1-phase
1 680 3-phase
1 620 3-phase
8
8
