5
Technical Information
3
en
<Figure 3.3>
Note
• To enable draining of the hydrobox an isolating
valve should be positioned on both the inlet and
outlet pipework.
• Be sure to install a strainer on the inlet pipe
work to the hydrobox.
• Suitable drain pipe work should be attached to
pressure relief valves, in accordance with local
regulations, with the exception of 5bar PRV
located next to the expansion vessel.
• The outlet for the 5bar PRV should be open
ended and facing the rear panel. Nothing
should be placed below the Hydrobox.
• A backflow prevention device must be installed
on water supply pipework.
• When using components made from different
metals or connecting pipes made of different
metals insulate the joints to prevent a corrosive
reaction taking place which will damage the
pipework.
Pa
22
8
7
5
9
10
11
13
14
15
16
20
23
19
4
21
22
12
17
18
3
6
Water circuit diagram
Water
supply
Drain
Drain
Water pipe
Local
system
No.
Part name
1 Control and electrical box
2 Main remote controller
3 Plate heat exchanger
(Refrigerant - Water)
4 Water circulation pump 1
5 Pump valve
6 Air vent (manual)
7 Drain cock (Primary circuit)
8 Booster heater
9 Flow sensor
10 Manometer
11 Pressure relief valve (3 bar)
12 Pressure relief valve (5 bar)
13 Automatic air vent
14 Expansion vessel
15 Strainer valve
16 THW1 (Flow water temp. thermistor)
17 THW2 (Return water temp. thermistor)
18 TH2 (Refrigerant liquid temp. thermistor)
19 Outdoor unit
20 Drain pipe (Local supply)
21
Back flow prevention device (Local supply)
22 Isolating valve (Local supply)
23
Magnetic filter (Local supply) (Recommended)
<Table 3.5>
*1 Refer to the following section [Local system].
Refrigerant pipe
Flare connections
Hydrobox
1-zone temperature control
Local system
1.
Heat emitters (e.g. underfloor heating) (local supply)
1
