Mitsubishi Electric EHSE-MEC, Service Manual

Page: 18 / 76

18
WATER SYSTEM DIAGRAM
8
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 lo -
cally.
• 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 met -
als or connecting pipes made of different metals
insulate the joints to prevent a corrosive reaction
taking place which will damage the pipework.
<Figure 8-1>
Water circuit diagram
Pa
17
18
21
24
22
23
5
3
16
9
10
11
12
14
15
19
26
4 6
7
8
*1
24
25
25
20
<EHS*> (Heating system)
<ERS*> (Heating and cooling system)
Local
system
Refrigerant pipe
Water
supply
DHW
Drain
Drain
Cold
water
Water pipe
Hydrobox
Flare connections
*
1
Refer to the following section [Local system].
No. Part name EHSE-YM9EC EHSE-MEC ERSE-YM9EC ERSE-MEC
1 Control and electrical box
2 Main remote controller
3 Plate heat exchanger (Refrigerant - Water)
4 Water circulation pump
5 Pump valve
6 Drain cock (Primary circuit)
7 Booster heater 1, 2 - -
8 Flow sensor
9 Manometer
10 Pressure relief valve (3 bar)
11 Automatic air vent
12 Strainer valve
13 Drain pan - -
14 THW1
15 THW2
16
TH2
17 THW5
(Optional part PAC-TH011TK-E or PAC-TH011TKL-E)
- - - -
18 Outdoor unit - - - -
19 Drain pipe (Local supply) - - - -
20 3-way valve (Local supply) - - - -
21 DHW indirect unvented tank (Local supply) - - - -
22 Cold water inlet pipe (Local supply) - - - -
23 DHW outlet pipe (Local supply) - - - -
24 Back flow prevention device (Local supply) - - - -
25 Isolating valve (Local supply) - - - -
26 Magnetic filter (Local supply) (Recommended) - - - -
27 Strainer (Local supply) - - - -
<Table 8-1>
OCH590B