Component Parts; Water Circuit Diagram - Mitsubishi Electric ecodan EHPT Série Manuel D'installation

3
Technical Information

Component Parts

<E**T***-*M**D>
(Packaged model system)
A
B 21
D
C
9
F
E
7
2
15
4
12
13
14
6
30
<Figure 3.1>

Water circuit diagram

<E*PT20/30X-*M**D> (Packaged model system)
Drain
31
3
34
34
36
<E*ST20C/30C/30D-*M**D> (Split model system)
36
32
Drain
29
31
28
Flare connection
(Split model system)
A
21
B
D
C
10
G
1
H
7
2
15
11 4
18
12
3
17
13
22
14
23
16
6
30
33
Cold water
36
32
A
21
9
7 10
Pa
15
18
26
27
17
19
16
5
22
23
6
24
4
6
14 25
11
13
12
6
Cylinder unit
<Figure 3.2>
33
Cold water
A
8*c
32
21
9
Drain
7
10
Pa
15
18
26
27
17
19
16
5
22
23
6
24
4
14 25
11
3
13
12
6
Cylinder unit
<Figure 3.3>
9
8
10
1
11
Note:
18
For installation of all
E**T***-*M*ED* models,
make sure to install a suit-
ably sized primary-side
expansion vessel and an
17
additional PRV to prevent
22
the expansion vessel from
23
burst in the field. (See
16
figure 3.2 ~ 3.3 and 4.3.2 for
further guidance)
DHW
B
34
Local system
*a
35
34
33
Water
Drain
supply
Water flow
DHW
B
8*b
34
Local system
*a
35
34
33
Water
Drain
supply
Refrigerant flow
Water flow
No. Part name
A DHW outlet pipe
B Cold water inlet pipe
C Water pipe (Space heating/cooling return connection)
D Water pipe (Space heating/cooling flow connection)
E Water pipe (Flow from heat pump connection)
F Water pipe (Return to heat pump connection)
G Refrigerant pipe (Gas)
H Refrigerant pipe (Liquid)
1 Control and electrical box
2 Main remote controller
3 Plate heat exchanger (Refrigerant - Water)
4 Booster heater 1,2
5 3-way valve
6 Drain cock (Primary circuit)
7 Manometer
8 Pressure relief valve (3bar)
9 Automatic air vent
10 Expansion vessel (Primary circuit)
11 Flow sensor
12 Strainer valve
13 Water circulation pump 1 (Primary circuit)
14 Pump valve
15 DHW tank
16 Plate heat exchanger (Water - Water)
17 Scale trap
18 Water circulation pump (Sanitary circuit)
19 Immersion heater *1
20 Temperature and pressure relief valve *1
21 Pressure relief valve (10bar) (DHW Tank)
22 Drain cock (DHW tank)
23 Drain cock (Sanitary circuit)
24 Flow water temp. thermistor (THW1)
25 Return water temp. thermistor (THW2)
26 DHW tank upper water temp. thermistor (THW5A)
27 DHW tank lower water temp. thermistor (THW5B)
28 Refrigerant liquid temp. thermistor (TH2)
29 Pressure sensor
30 Drain pan
31 Outdoor unit
32 Drain pipe (Local supply)
33 Back flow prevention device (Local supply)
34 Isolating valve (Local supply)
35 Magnetic filter (Local supply) (Recommended)
36 Strainer (Local supply)
37 Additional PRV (Local supply)
38 Inlet control group *1
39 Filling loop (Ball valves, check valves and flexible hose) *1
40 Potable expansion vessel *1
*1 Supplied with UK model ONLY. Please refer to PAC-
WK02UK-E Installation Manual for more information on
accessories.
<Table 3.5>
Go to the Mitsubishi website to check the water
circuit of other units and the component parts of
each unit.
*a Refer to the following section [Local system].
*b E**T20 only
*c E**T30 only
Notes
• To enable draining of the cylinder unit 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 cylinder unit.
• Suitable drain pipework should be attached
to all relief valves in accordance with your
country's regulations.
• A backflow prevention device must be in-
stalled on the cold water supply pipework
(IEC 61770)
• When using components made from differ-
ent metals or connecting pipes made of dif-
ferent metals insulate the joints to prevent
any corrosive reaction taking place which
may damage the pipework.
en
8