Water System Diagram - Mitsubishi Electric EHSD-MED Service Manual

8

WATER SYSTEM DIAGRAM

<E*PX> (Packaged model system)
Hydrobox
Note:
12
Do not attach an
additional pressure
relief valve to the
heating (cooling)
circuit on E*PX
model to keep fire
safety. 7
5
4
3
22
29 32 *2
31
29
11 31
Note
• Be sure to follow your local regulations to perform system configuration of the DHW con-
nections.
• 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 the relief valves instructed to be connected
to it in Figure 8.1 and 8.2 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.
<E*S*> (Split model system)
20
6
5
4
19
3
22
Flare connections
OCH712C
16 13
9
8
18
17
Pa
10
14
31
29
24
29
28
<Figure 8.1>
Hydrobox
16 13
12
8
9
11
7
18
17
P
14 10
23
30
Drain
29
24
<Figure 8.2>
Water flow
No.
Cold
DHW
1 Control and electrical box
water
2 Main remote controller
Plate heat exchanger
27
28
3
(Refrigerant - Water)
26
4 Water circulation pump 1
5 Pump valve
25
6 Air vent (manual)
7 Drain cock (Primary circuit)
21
8 Booster heater 1, 2
9 Flow sensor
10 Manometer
11 Pressure relief valve (3 bar)
12 Automatic air vent
Local
13 Expansion vessel
system
*1
14 Strainer valve
15 Drain pan
16 Pressure relief valve (5 bar)
17 THW1
18 THW2
19 TH2
20 Pressure sensor
Water
Drain
THW5B
supply
(Optional part
21
PAC-TH011TK2-E or
PAC-TH011TKL2-E)
22 Outdoor unit
23 Drain pipe (Local supply)
24 3-way valve (Local supply)
DHW indirect unvented tank
25
(Local supply)
Cold water inlet pipe
26
(Local supply)
DHW outlet pipe
27
(Local supply)
Back flow prevention device
28
(Local supply)
Isolating valve
29
(Local supply)
Magnetic filter (Local
30
supply) (Recommended)
31 Strainer (Local supply)
32 Air vent (Local supply)
*1 Refer to the following section [Local system].
*2 If the outdoor unit is higher than the indoor unit, or if there is a
location where air gets trapped in the upper part of the water
pipe, consider adding this part.
*3 EHPX-YM9ED and EHPX-MED are not included.
*4 ERSE-YM9ED is not included.
*5 Only 2HP(E*SD) model.
Refrigerant flow
Water flow
Cold
DHW water
27 28
26
25
21
Local
system
*1
29
28
Water Drain
supply
19
Part name
- - -
- - -
-
-
- - -
*3
-
*3
- - -
- - -
- -
-
- -
-
- -
-
- - -
- -
-
- - -
- -
-
- - -
- -
-
- - -
- -
-
- - -
<Table 8.1>
<E*SE only>
12
8
11
9
17
- -
- -
-
*4
- - -
- - -
*4
*5 *5 *5 *5 *5
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -