Unit Compatibility; Water Circuit Diagram - Mitsubishi Electric Ecodan EHSC series Installation Manual

3
Technical Information

Unit Compatibility

Outdoor unit
PUHZ-W50-85
Packaged-type
PUHZ-HW112-140
Split-type PUHZ-RP35-140
PUHZ-HRP71-125
PUHZ-SW40-120
PUHZ-SHW80-140
PUHZ-FRP
*1 Not available for connection to PUHZ-FRP

Water circuit diagram

<EHSC> (Split model system)
<ERSC> (Split model system for heating and cooling)
9
2
15
1
12
17
Flare connections
<EHPX> (Packaged model system)
9
12
17
1
24
26
24
26
3
Hydrobox
EHSC-VM6B EHSC-YM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B
.
Hydrobox
10
13
4
5
6
3
14
8
11
Pa
18 7
25
Drain
24
19
<Figure 3.9>
Hydrobox
10
13
4
5
6
3
14
8
11
Pa
18 7
25
24
19
<Figure 3.10>
<Table 3.10>
A
B
Cold
DHW
water
22 23
21
20
16
Local
system *
24
23
Drain
Water
supply
B
Cold
DHW
water
22
23
21
20
16
Local
system *
24
23
Water Drain
supply
EHPX-VM6B EHSC-YM9B
A. Refrigerant pipe
B. Water pipe
. Plate heat exchanger
2. Flexible hose
3. Booster heater ,2
4. Drain cock (booster heater)
5. Pump valve
6. Water circulation pump 
7. Manometer
8. Pressure relief valve
9. Automatic air vent
10. Expansion vessel (except EHSC-*M*EB)
. Strainer valve
2. Flow switch
3. THW
4. THW2
5. TH2
6. THW5 (optional part PAC-TH011TK-E)
7. Outdoor unit
8. Drain pipe (field supply)
9. 3-way valve (field supply)
20. DHW indirect unvented tank (field supply)
2. Cold water inlet pipe (field supply)
22. DHW outlet connection (field supply)
23. Back flow prevention device (field supply)
24. Isolating valve (field supply)
25. Magnetic filter is recommended (field supply).
26. Strainer (field supply)
*1 Refer to page 14.
Note
• Be sure to follow your local regulations to per-
form system configuration 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 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.
ERSC-VM2B
*