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Mitsubishi Electric Hydrobox EHSC Series Installation Manual page 9

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3
Technical Information
Water circuit diagram
*1 Refer to the following section [Local system].
<EHPX> (Packaged model system)
Hydrobox
11
6
5
4
20
3
27
29
27
29
Note
• 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.
*1 Refer to the following section [Local system].
<EHS*> (Split model system)
<ERS*> (Split model system for heating and cooling)
5
4
18
3
20
Flare connections
15
12
16
7
8
17
Pa
13
9
28
24
22
27
26
Water
supply
<Figure 3.5>
Hydrobox
15
12
11
16
7
8
6
17
10
P
13
9
21
28
Drain
27
22
27
26
Water
supply
<Figure 3.6>
Water pipe
No.
1 Control and electrical box
2 Main remote controller
Plate heat exchanger
Cold
3
(Refrigerant - Water)
water
DHW
4 Water circulation pump 1
5 Pump valve
25
26
6 Drain cock (Primary circuit)
24
7 Booster heater 1, 2
8 Flow sensor
23
9 Manometer
10 Pressure relief valve (3 bar)
19
11 Automatic air vent
12 Expansion vessel
13 Strainer valve
14 Drain pan
15 Pressure relief valve (5 bar)
Local
16 THW1
system *1
17 THW2
18 TH2
THW5B
19
(Optional part PAC-TH011TK2-E
or PAC-TH011TKL2-E)
20 Outdoor unit
21 Drain pipe (Local supply)
22 3-way valve (Local supply)
Drain
DHW indirect unvented tank
23
(Local supply)
Cold water inlet pipe
24
(Local supply)
25 DHW outlet pipe (Local supply)
Back flow prevention device
26
(Local supply)
27 Isolating valve (Local supply)
Magnetic filter (Local supply)
28
(Recommended)
29 Strainer (Local supply)
Refrigerant pipe
Water pipe
Cold
DHW
water
25
26
24
23
19
Local
system *1
Drain
EHPX-
EHS*-
EHS*-
EHSC-
Part name
*M*D
MED
*M*D
*M*ED
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
-
-
-
-
-
-
-
-
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<Table 3.5>
ERS*-
ERSC-
VM2D
MED
-
-
-
-
-
-
en
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
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-
-
-
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8

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