figure 18 - Height of the base
of the evacuation flue (B23)
40 cm
8 m
40 cm
40 cm
8 m
1,2 m
< 15°
2 .6 .4 Connection pipe
The evacuation pipe must comply with the regulations
in force
The cross section of the connection pipe must not be
smaller than the outlet nozzle of the appliance.
The connection pipe must be removable.
It is strongly recommended to fit a flue regulator to the
pipe when the low pressure of the chimney is greater
than 30 Pa. The flue gas case is reversible (2 screws)
and the smoke outlet axis may be offset with respect to
the axis of the boiler to the right or to the left.
The evacuation nozzle is to be connected to the pipe so
that there are no leaks.
2 .7 Refrigerating connections
"
This appliance uses the refrigerating fluid
R410A.
Respect the legislation for handling refrigerating fluids.
2 .7 .1 Rules and precautions
• After each operation on the refrigerating circuit, and
before the final connection, ensure that the plugs are
fitted so as to avoid any pollution of the refrigerating
circuit
•
Minimum tooling required
-
Set of pressure gauges (
Manifold
) with flexible hoses
for HFC (Hydrofluorocarbons).
-
Vacuum gauge with isolation valves.
-
Special vacuum pump for HFC (use of a classic
vacuum pump only allowed if fitted with a non return
valve for the suction).
-
Disengageable flaring tool, tube cutter, deburrer,
wrenches,
-
Approved refrigerating fluid detector (sensitivity 5g/
an).
"
Tooling that has been in contact with HCFC (R22
for example) or CFC may not be used.
•
The manufacturer refuses all responsibility for
warranty if the above values are not respected .
• Tube expanders (flared connectors)
"
Lubrication with mineral oil
(for R12, R22) is prohibited.
-
Only lubricate with polyolester refrigerating oil (POE).
If POE oil is not available, fit without oil.
Cover the flared surface
with
POE refrigerating oil
Do not use mineral oil .
•
Brazing on the refrigerating circuit
(if required)
-
Silver brazing (40% minimum recommended).
-
Brazing with a dry Nitrogen stream only.
• To eliminate the swarf from the pipes, use dryNitrogen to
avoid introducing humidity that can harm the operation
of the appliance. In general, take every precaution to
avoid humidity penetrating into the appliance.
• Thermally insulate the gas and liquid pipe to avoid
all condensation. Use insulating sleeves that resist
temperatures of over 90°C. In addition, if the level
of humidity where the refrigerating pipes risks
exceeding 70%, protect them with insulating sleeves.
Use a 15 mm thicker sleeve if the humidity reaches
80%, and a 20 mm thicker sleeve if the humidity
exceeds 80%. If the recommended thicknesses are
not respected in the conditions described above,
condensation will form on the surface of the insulation.
Finally, ensure that insulating sleeves are used that
have a thermal conductivity equal to 0.045 W/mK or
lower when the temperature is equal to 20°C. The
insulation must be impermeable to resist the steam
passing during the defrosting cycles (glass wool is
prohibited).
Installation and operating manual
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1605 - EN
"
alfea hybrid duo heat pump oil low NOx CH
- 18 -
