Mitsubishi Electric ecodan ERST20 series Installationshandbuch Seite 9

3
technical information
• Refer to <Table 3.2> for the part names.
*1 Refer to the following section [Local system].
<EHPT20X-MHCW> (UK Packaged model system) <Example>
Drain
Drain
29
3
32
34 32
Model name
Maximum supply pressure to the pressure reducing valve
Operating pressure (Potable side)
Expansion vessel charge setting pressure (Potable side)
Expansion valve setting pressure (Potable side)
Immersion heater specification (Potable side) *
DHW tank capacity
Mass of the unit when full
Maximum primary working pressure
* EN60335/Type 3000W single phase 230V 50Hz, length 460 mm.
Use only Mitsubishi Electric service parts as a direct replacement.
<EHPT20X-*M*C> (Packaged model system)
30
Drain
27
1
32
32
34
35
Cold water
34
30
9
30
10
A
Drain
11
8
Pa 21
30 16
19
18
17
7
24
6
5
25
4
7
26
15
13
7 14
Cylinder unit
<Figure 3.4>
31
Cold water
34
30
22
9 10
A
11
8
Pa
16
19
18
17
7
24
6
5
25
4
7
26
15
14
13
7
Cylinder unit
<Figure 3.5>
Water pipe
37
DHW
B
32
Local system
*1
33
27 32
20
Drain
23
Flexible hose
(Temporary connection)
36
Main water supply
12
eHPt20X-MHCW eHSt20C-MHCW
16 bar
3.5 bar
3.5 bar
6.0 bar
3000 W, 230 V
200 L
307 kg
2.5 bar
<Table 3.5>
Water pipe
DHW
B
32
Local system
*1
27
33
20
32
31
23
Water Drain
supply
12
Note
• To enable draining of the cylinder unit an iso-
lating valve should be positioned on both the
inlet and outlet pipework. No valve should be
fitted between the expansion valve (item 35)
and the cylinder unit (safety matter).
• 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 coun-
try's regulations.
• When using components made from different
metals or connecting pipes made of different
metals insulate the joints to prevent any corro-
sive reaction taking place which may damage
any pipework.
• Filling loop's flexible hose must be removed
following the filling procedure. Item provided
with unit as loose accessory.
• Install the inlet control group (item 33) above
the level of the T&P relief valve (item 19). This
will ensure DHW tank will not require drain-
down to service/maintain the inlet control
group.
eHSt20d-MHCW
16 bar
3.5 bar
3.5 bar
6.0 bar
3000 W, 230 V 3000 W, 230 V
200 L
320 kg
2.5 bar
Note
• 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.)
16 bar
3.5 bar
3.5 bar
6.0 bar
200 L
312 kg
2.5 bar
8