Mitsubishi Electric Ecodan EHST20 serie Para El Instalador página 9

3
technical information
UK Packaged model system
<example>
<EHPT20X-VM2HB> (UK Packaged model system)
26
34
Drain
26
Drain
25
1
30
30
34
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)
* EN60335/Type 3000W single phase 230V 50Hz, length 460 mm
** Use only Mitsubishi Electric service parts as a direct replacement.
DHW tank capacity
Mass of the unit when full
Maximum primary working pressure
38
35
Cold water
9
10
Pa
27
26
28
11
Drain
12
17
13
23
15
16
14
8 7
M
6
21
4
5
3
22
19
18
20
Cylinder unit
<Figure 3.7>
EHPT20X-VM2HB
<Table 3.8>
B
DHW
30
Local system
*1
31
30
Drain
Flexible hose
(Temporary connection)
36
Mains water supply
16 bar
3.5 bar
3.5 bar
6.0 bar
3000 W, 230 V
200 L
332 kg
2.5 bar
B. Water pipe
1. Plate heat exchanger
3. Booster heater 1,2
4. Drain cock for booster heater)
5. Pump valve
6. Water circulation pump 1
7. 3-way valve
8. Manual air vent
9. Manometer
10. Pressure relief valve
11. Automatic air vent
12. Expansion vessel
13. DHW tank
14. Drain cock for DHW tank
15. Flexible hose
16. Immersion heater (only for EH*T20*-*M*HB)
17. T&P relief valve
18. Strainer valve
19. Flow switch
20. Drain cock for primary circuit
21. THW1
22. THW2
23. THW5
25. Outdoor unit
26. Drain pipe (field supply)
27. Cold water inlet pipe
28. DHW outlet connection
30. Isolating valve (field supply)
31. Magnetic filter (field supply) (recommended)
34. Strainer (field supply)
35. Inlet control group supplied with UK model ONLY*
36. Filling loop (Ball valves, check valves, and flexible
hose) supplied with UK model ONLY*
38. Potable expansion vessel supplied with UK model
ONLY*
*Please refer to PAC-WK01UK-E Installation Manual
for more information.
*1 Refer to Page 10.
Note
• To enable draining of the cylinder unit an isolat-
ing 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 fol-
lowing the filling procedure. Item provided with
unit as loose accessory.
• Install the inlet control group (item 35) above
the level of the T&P relief valve (item 17).
This will ensure DHW tank will not require
drain-down to service/maintain the inlet control
group.
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