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AHP60
26/32 kW -
Installation, Use and Maintenance
3.5.2. General information
The hydraulic connections must comply with the national or local regulations; the
pipes may be made or steel or galvanised steel. Flexible hoses may be used if their
diameter is larger. The dimensions of the pipes must be chosen carefully to suit the
nominal water flow rate of the appliance and the pressure drops in the hydraulic circuit.
All of the hydraulic connections must be insulated with closed-cell insulation of adequate
thickness. The unit must be connected to the pipes using new hoses that have not been
re-used. We recommend fitting the following components in the hydraulic circuit:
• Thermometer with sensor for the reading the temperature in the circuit.
• Manual valves to isolate the unit from the hydraulic circuit.
• Y-shaped metal filter and filter-settler (installed on the system return pipe) with a
metal mesh not larger than 1mm.
• Loading unit and discharge valve if required
3.5. Hydraulic connections
3.5.1. The accessories to be connected to the outdoor unit
-In the same way, the hydraulic connections must comply with good engineering practices
according to the regulations in force.
-Before making the hydraulic connections, the supply pipes must be cleaned to avoid contami-
nating the tank with metal or other types of particles.
-Check when hot that the pressure does not exceed the service pressure.
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Recommendations
: for regions where the water is hard, the use of a water softener does not
imply any change in our Guarantee, provided that the softener is adjusted in line with trade
standards.
-
The water hardness must be greater than 8°f and less than 15.1°f.
CAUTION:
When choosing the size of the pipes, make sure that the maximum pressure
drop of the system as stated in the technical data in paragraph 2.4.1 is not
exceeded (see useful head).
Always connect the pipes to the connections using the wrench-to-wrench
system.
Make a suitable drain for the safety valve.
It is the installer’s responsibility to check that the expansion vessel is suitable
for the actual capacity of the system.
CAUTION:
A metal filter must be fitted (with a mesh size not exceeding 1000 µm) as well as
a T connector on the return pipe of the system labelled WATER INLET. If the flow
rate switch is tampered with or modified, or if the metal filter and filter-settler
are not fitted to the system, the warranty is immediately void. The filter and
filter-decanter must be kept clean, so please always ensure they are clean after
installation of the appliance and check them periodically.
All units are fitted with a flow rate controller (factory-fitted). If the flow rate
controller is modified or removed, or if the water filter and filter-settler are not
fitted on the unit, the warranty is immediately void. Refer to the wiring diagram
supplied with the appliance for the connection of the flow rate controller. Never
shunt the flow rate controller connections in the terminal block.
The heating system connected to this unit must be installed in compliance with
the standard EN-12828.
