Water System Diagram - Mitsubishi Electric EHSC-VM2B Service Manual

8

WATER SYSTEM DIAGRAM

<EHSC> (Split model system)
<ERSC> (Split model system for heating and cooling)
9
2
15
1
12
17
<EHPX> (Packaged model system)
9
12
17
1
24
26
24
26
OCH532A
Hydrobox
10
13
4
5
6
3
14
8
11
Pa
18 7
25
Drain
24
19
Hydrobox
10
13
4
5
6
3
14
8
11
Pa
18 7
25
24
19
A
B
Cold
DHW
water
22 23
21
20
16
Local
system *1
24
23
Drain
Water
supply
B
Cold
DHW
water
22
23
21
20
16
Local
system *1
24
23
Drain
Water
supply
28
A. Refrigerant pipe
B. Water pipe
1. Plate heat exchanger
2. Flexible hose
3. Booster heater 1,2
4. Drain cock (booster heater)
5. Pump valve
6. Water circulation pump 1
7. Manometer
8. Pressure relief valve
9. Automatic air vent
10. Expansion vessel (except EHSC-*M*EB)
11. Strainer valve
12. Flow switch
13. THW1
14. THW2
15. TH2
16. THW5 (optional part PAC-TH011TK-E)
17. Outdoor unit
18. Drain pipe (fi eld supply)
19. 3-way valve (fi eld supply)
20. DHW indirect unvented tank (fi eld supply)
21. Cold water inlet pipe (fi eld supply)
22. DHW outlet connection (fi eld supply)
23. Back fl ow prevention device (fi eld supply)
24. Isolating valve (fi eld supply)
25. Magnetic fi lter is recommended (fi eld supply).
26. Strainer (fi eld supply)
*1 Refer to page 29.
Note
• Be sure to follow your local regulations to per-
form system confi guration of the DHW connec-
tions.
• DHW connections are not included in the hy-
drobox 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 coun-
try's regulations.
• A backfl ow 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.