Nimbus Compact M NET R32 Installation Manual UK

Hydraulic connections
4. Hydraulic connections
4.1 Indoor unit hydraulic connections
Preliminary checks:
a
– Check that the system has been cleaned;
– Check that there are no impurities in the circuit water;
– Check that compatible components are used (e.g. do
not connect copper and steel to each other);
– Check that the connection to the heating system has
been made correctly;
– check that the water supply distribution network pressure
does not exceed 0.5 MPa (5 bar), otherwise install a
pressure reducer at the system's intake;
– check that a disconnect device with cock is installed
between the system and the domestic water supply
distribution network (if present);
– check that the supplied expansion vessel is large
enough to handle the water in the system and, if necessary,
install an additional one;
Remove the rubber protective caps before making
the hydraulic connections. The plugs are
used exclusively as a protective device during
transport.
After the checks:
Z1
OUT
1
2
3
B
7
4
5
IN
A
6
8
OUT
Z1
IN
Fig. 41
(*) If recirculation is used, remove the brass plug before using
the connection
1-ZONE configuration
– Mount the quick couplings (present inside the machine)
on the water pipes (1), (3), (7) and (8).
8
1
7
3
Fig. 40
Consider the following hydraulic connections:
– System flow (1)
– Safety valve drain (2)
– Delivery to heat pump (3)
– Recirculation (4) (if present) (*)
– Domestic hot water return (5)
– Domestic hot water flow (6)
– System return (7)
– Return from heat pump (8).
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