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manual
HRC
70
PILOT -PREMIUM-
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3.3.5 - Heat Pump water inlet filter (supplied)
A 1’’ valve with a built-in 500µm filter must be installed on the water
inlet piping on the Heat Pump:
• Respect the direction of flow on the filter (arrow on the
valve)
• Install the 1’’ valve with filter on the inside of the
building and ensure it is thermally insulated.
Clean the filter several times after the Heat
Pump circulator pump has been activated
for the first time (make sure to switch off the Heat
Pump circulator pump before cleaning).
• Installation of the 500µm grain size filter
supplied with the Pilot is mandatory to
prevent any clogging of the heat exchanger.
• Before making any hydraulic connections to the
Heat Pump, it is necessary to desludge and flush
the installation.
For underfloor heating, the piping in the
heating circuit must not be less than 1’’ in
diameter.
• Clean the filter at least once per year.
3.3.6 - Heating circuit
3.3.6.1 - Flow rate of the heating circuit
• For radiators, fan heaters, or underfloor heating on the heating
circuit.
A sufficient flow rate must be ensured so that the difference
in temperature between the inlet and outlet points is not
more than 15K in a radiator or fan heating circuit, or 7K in an
underfloor heating circuit.
In an installation equipped with thermostatic mixing valves, this
inspection must be done with all taps/valves open.
The power of the transmitters determines the water flow rate of
the heating circuit and allows to check that the widths, lengths,
and hydraulic distribution network is compatible with the
circulator equipping the Pilot.
Adapt the speed (I, II, III or IV) of the UPM3 25-70 circulator
equipping the Pilot, to the hydraulic characteristics using the
flow rate curve Q (m
3
/h) /height H (mCE).
3.3.6.2 - Backflow prevention device
3.3.6.4 - Insulating the piping
3.3.6.5 - Expansion vessel
3.3.6.6 - Frost protection and treatment of
water
3.3.6.3 - Purging the heating circuit
French law (articles 16.7 and 16.8 of the ‘‘Règlement Sanitaire
Départemental’’) stipulates that a type CB backflow prevention
device must be installed. This device must be at different, non-
regulated pressure zones, in accordance with the NF P 43-011
standard. This is also an obligatory requirement in other countries,
which makes it important to verify the current laws and standards
in effect in the country of installation and ensure that your
installation is in compliance with them. The backflow prevention
device is designed to prevent incoming heating water from
entering the drinking water circuit. It must be connected to the
mains drainage system.
All necessary measures must be taken to ensure that the
installation can be continuously purged. Automatic air purging
valves should be placed at each high point of the installation, and
manual air purging valves should be installed on each radiator.
Insulants must conform to the DTU 67.1 standard, or the current
regulations in effect in the country of installation.
All visible piping and accessories (circulator pump, expansion
vessel, valves, etc...) must be either insulated or placed in
insulated sleeves.
Remember to insulate the distribution manifolds and the inlet
and outlet flow pipes to the underfloor heating circuit.
Remember to insulate the piping which connects the Heat Pump
to the Pilot.
An expansion vessel must be installed onto the heating circuit.
See Appendix A4 for information on the proper sizing of the
expansion vessel.
See instruction in Appendices A3 and A5.
See § «Setting the 4 speeds on the circulator pump» in the HRC
70
Heat Pump installer manual.
