2 .9 Hydraulic connection
2 .9 .1 General
The connection must comply with trade practices
according to the regulations in force.
The heating circulation pump is integrated into the
hydraulic module
Connect the pipe of the central heating to the hydraulic
module respecting the direction of the circulation.
The diameter of the pipes, between the Hydraulic
module and the heating manifold must be at least equal
to 1 inch (26x34 mm).
Calculate the diameter of the pipes in function of the
flow rates and lengths of the hydraulic systems.
Tightening torque: 15 to 35 Nm.
Use union connectors to facilitate the removal of the
hydraulic module
Prefer the use of flexible connector hoses to avoid
transmitting noise and vibrations to the building.
Connect the evacuations of the drain tap and the safety
valve to the drain.
Verify the correct functioning of the expansion system.
Control the vessel pressure (precharge 1 bar) and the
safety valve setting.
Reminder: Make the assembly impervious respecting
trade practices in force for the plumbing work:
-
Use suitable seals (fibre seals, O rings).
-
Use Teflon or hemp tape.
-
Use sealant (synthetic as required).
There is no need for glycol. If water containing glycol
is used, carry out an annual check of the quality of the
glycol
The use of glycol monoethylene is prohibited .
"
In certain installations, the presence of different
metals may cause corrosion problems; in which
case the formation of metal particles and sludge
may be observed in the hydraulic circuit .
"
In this case, it is preferable to use a corrosion
inhibitor in the proportions recommended by its
manufacturer .
"
It is also necessary to ensure that the water
treated does not become aggressive .
R1
D
MT
CAR
GS
figure 25 - Overall view of the electrical connections
Legend
CAR:
Non-return valve
D:
Disconnector
GS:
Safety device
MT:
Thermostatic mixing
valve
R1:
Heating circuit
Sanitary flexible hoses
Ø 20x27 female
Ø 26x34
male
Installation and operating manual
"
1605 - EN
"
alfea hybrid duo heat pump oil low NOx CH
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