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5 Hydraulics installation
5
Hydraulics installation
Danger!
Risk of scalding and/or risk of material
damage due to incorrect installation lead-
ing to escaping water.
Stresses in connection pipes can cause
leaks.
▶
Install the connection pipes such that they
are free from mechanical stress.
Caution.
Risk of material damage due to heat trans-
fer during soldering.
▶
Only solder connectors if the connectors
are not yet screwed to the service valves.
5.1
Carrying out the installation preparations
▶
Install the following components, preferably from the
manufacturer's accessories:
–
An expansion relief valve, a stopcock and a mano-
meter on the heating return
–
A domestic hot water safety group and a stopcock on
the cold water supply
–
A stopcock on the heating flow
▶
Check whether the volume of the installed expansion
vessel is sufficient for the heating system. If the volume
of the installed expansion vessel is insufficient, install an
additional expansion vessel, connected as close to the
product as possible, in the heating return.
▶
Flush the heating installation through thoroughly before
connecting the product in order to remove any residue
which could be deposited in the product and lead to dam-
age.
▶
Check whether, when you open the catches on the refri-
gerant pipes, you can hear a hissing sound (caused by
a factory-side excess pressure of nitrogen). If you do not
find any excess pressure, check all of the screwed con-
nections and pipes for leaks.
▶
For heating installations with solenoid valves or thermo-
statically controlled valves, install a bypass with bypass
valve in order to guarantee a volume flow of at least 40%.
5.2
Routing refrigerant pipes
1.
Observe the information on handling refrigerant pipes in
the installation instructions for the outdoor unit.
2.
Route the refrigerant pipes from the wall duct to the
product.
3.
Bend the pipes only once into their final position. Use a
bending spring or another suitable bending tool to avoid
kinks.
26
4.
Secure the pipes to the wall using insulated wall brack-
ets (cold insulation brackets).
5.3
Connecting the refrigerant pipes
Danger!
Risk of injury and risk of environmental
damage due to escaping refrigerant.
Touching any escaping refrigerant may
cause injury. Escaping refrigerant leads
to environmental damage if it reaches the
atmosphere.
▶
Only carry out work on the refrigerant cir-
cuit if you have been trained to do so.
1.
Remove the flare nuts and the catches from the con-
nections for the refrigerant pipes on the product.
◁
An audible hissing sound (escaping nitrogen) shows
that the refrigerant circuit in the product is leak-tight.
2.
Apply a drop of flare oil to the outsides of the pipe ends
in order to prevent the flare edge from breaking away
when tightening screwed connections.
3.
Connect the hot gas pipe (2). Use the product's flare
nuts.
Caution.
Risk of damage to the refrigerant pipes
caused by excessive tightening torque
▶
Note that the following torques only refer
to flanged connections. The torques for
SAE connections are lower.
Installation and maintenance instructions Hydraulic station 0020257319_02
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