24
Checks to be performed
1 Is the heat interface unit properly secured to the wall?
2 H
as the system flushing been carried out?
3 Check strainers and clean them if necessary
4 Is the heat meter (if present) connected?
5 Is the heat meter (if present) connected to the building datalogger (if required)?
6 Is the DCW line fitted with a pressure reducing valve?
7 Is the system protected by water hammer arresters?
8
Are the shut-off valves open?
9
Has the visual inspection of the hydraulic sealing efficiency produced positive results?
10
Has the system (primary) been filled and vented?
11 Has the system (secondary) been vented and filled to a pressure of between 1,2 and 2 bar?
12
Has the visual inspection of the HIU internal electrical connections given a positive result and are the
connections compliant with specifications and made in accordance with best practices?
13
Is the heat interface unit connected to the 230 Vac electric supply? Is the remote user interface
connected?
14
Have the optional connections (external sensor, prepayment, auxilliary microswitch, Modbus, if required)
been carried out?
15
Has the remote user interface been configured for installation on board (thermostat function disabled) /
inside the apartment (with thermostat function enabled)?
16
Have the heating, DHW and comfort functions (if required) been activated?
17
Have the heating and DHW set points been configured correctly?
18
Have the optional functions (return temperature limitation, return/weather compensation, anti-legionella,
primary flow rate limitation) been enabled (if required) and configured?
19
Have the external room thermostats (if required) been connected?
20
No error code on heat interface unit remote user interface?
21
Is the primary circuit at working temperature?
22
Check that heating starts (blinking icon) by simulating a heating request
23
Check that the pump functions correctly when the thermostat is activated (check that the secondary flow
pipes heat up)
24
Simulate minimal DHW tapping (approx 3 l/min) and check that “DHW” LED lights and that water is
supplied at the required temperature
25
Simulate abundant DHW tapping and check, by means of the installed heat meter, that the primary
circuit flow rate is sufficiently high
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