Water System Diagram - Mitsubishi Electric EHSD-MEC.UK Service Manual

8

WATER SYSTEM DIAGRAM

*1 Refer to the following section [Local system].
<EHS*> (Split model system)
<ERS*> (Split model system for heating and cooling)
4
17
3
19
Flare connections
<EHPX> (Packaged model system)
11
6
5
19 3
26
28
28 26
OCH571
Hydrobox
11
12
7
8
5
6
16
15
13 10 Pa
9
20
27
Drain
26
21
<Figure 8-1>
Hydrobox
12
7
8
16
15
13 10
Pa 9
4
20
27
Drain
26
21
<Figure 8-2>
No.
1 Control and electrical box
Refrigerant pipe
2 Main controller
Water pipe
Plate heat exchanger
3
(Refrigerant - Water)
Cold
DHW 4 Water circulation pump 1
water
5 Pump valve
6 Drain cock (Primary circuit)
24
25
7 Booster heater 1, 2
23
8 Flow sensor
22
9 Manometer
10 Pressure relief valve (3 bar)
18
11 Automatic air vent
12 Expansion vessel
13 Strainer valve
14 Drain pan
Local 15 THW1
system
16 THW2
*1 17 TH2
THW5
26
(Optional part PAC-
18
TH011TK-E or PAC-
TH011TKL-E)
25
19 Outdoor unit
20 Drain pipe (Local supply)
Water Drain
21 3-way valve (Local supply)
supply
22 DHW indirect unvented
tank (Local supply)
23 Cold water inlet pipe
(Local supply)
DHW outlet pipe
24
(Local supply)
25 Back flow prevention
device (Local supply)
Isolating valve
26
(Local supply)
Magnetic filter
27 (Local supply)
(Recommended)
28 Strainer (Local supply)
Water pipe
Cold
DHW
water
24 25
23
22
18
Local
system
*1
26
25
Water Drain
supply
18
EHS*- EHS*- EHSC- ERS*-
Part name
MEC *M*C *M*EC VM2C
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<Table 8-1>
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- EHPX-
MEC *M*C
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