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3
Technical Information
Water circuit diagram
<EHPX> (Packaged model system)
7
22
3
29
31
en
29
31
Notes
• Be sure to follow your local regulations to perform system configuration of the DHW connections.
• DHW connections are not included in the hydrobox package. All required parts are to be sourced
locally.
• 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 pipework should be attached to all relief valves in accordance with your country's
regulations.
• A backflow prevention device must be installed on water supply pipework (IEC 61770).
• 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.
<E*S*> (Split model system)
20
19
3
22
Flare connections
9
Hydrobox
16
13
12
9
8
18
17
5
Pa
4
10
14
31
29
24
<Figure 3.5>
Hydrobox
16
13
12
6
8
9
5
11
7
4
18
17
P
14
10
22
31
Drain
29
24
<Figure 3.6>
Water pipe
No.
Cold
water
DHW
27
28
26
25
21
Local
system *1
29
28
Water
Drain
supply
*1 Refer to the following section [Local system].
*2 EHPX-YM9ED and EHPX-MED are not included.
*3 ERSE-YM9ED is not included.
*4 Only 2HP(E*SD) model.
Refrigerant pipe
Water pipe
Cold
water
DHW
27
28
26
25
21
Local
system *1
29
28
Water
Drain
supply
EHPX-
Part name
*M*
(E)D
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 1, 2
9 Flow sensor
10 Manometer
11 Pressure relief valve (3 bar)
-
12 Automatic air vent
13 Expansion vessel
*2
14 Strainer valve
15 Drain pan
-
16 Pressure relief valve (5 bar)
*2
17 THW1
18 THW2
19 TH2
-
20 Pressure sensor
-
THW5B
21
-
(Optional part PAC-TH011TK2-E
or PAC-TH011TKL2-E)
22 Outdoor unit
-
23 Drain pipe (Local supply)
-
24 3-way valve (Local supply)
-
DHW indirect unvented tank
25
-
(Local supply)
26 Cold water inlet pipe
-
(Local supply)
27 DHW outlet pipe (Local supply)
-
Back flow prevention device
28
-
(Local supply)
29 Isolating valve (Local supply)
-
Magnetic filter (Local supply)
30
-
(Recommended)
31 Strainer (Local supply)
-
<Table 3.5>
<E*SE only>
12
8
11
9
17
EHS*-
EHS*-
EHS*-
ERS*-
ERS*-
YM
MED
*M*D
*M*(E)D
MED
9ED
-
-
-
-
*3
-
-
-
-
-
-
*3
-
*4
*4
*4
*4
*4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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