Parts Names And Functions - Mitsubishi Electric EHST20C-VM2C.UK Service Manual

4
PART NAMES AND FUNCTIONS
<EHST20*-*M**C>
(Split model system)
F/G
E/H
C
D
8
2
16
4
13
3
14
<Note>
For installation of EHST20*-*M*EC
model, make sure to install a primary -
side expansion vessel in the field. (See
figure 4.3.1 in the installation manual.)
No. Part name
A DHW outlet pipe
B Cold water inlet pipe
C Water pipe (Space heating return connection)
D Water pipe (Space heating 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 controller
3 Plate heat exchanger (Refrigerant - Water)
4 Booster heater 1,2
5 3-way valve
6 Manual air vent
7 Drain cock (Primary circuit)
8 Manometer
9 Pressure relief valve (3bar)
10 Automatic air vent
11 Expansion vessel
12 Flow sensor
13 Strainer valve
14 Water circulation pump 1 (Primary circuit)
15 Pump valve
16 DHW tank
17 Plate heat exchanger (Water - Water)
18 Scale trap
19 Water circulation pump (Sanitary circuit)
20 Immersion heater
21 Temperature and pressure relief valve
22 Pressure relief valve (10bar) (DHW Tank)
23 Drain cock (DHW tank)
24 Drain cock (Sanitary circuit)
25 Flow water temp. thermistor (THW1)
26 Return water temp. thermistor (THW2)
27 DHW tank water temp. thermistor (THW5)
28 Refrigerant liquid temp. thermistor (TH2)
29 Outdoor unit
30 Drain pipe (Local supply)
31 Back flow prevention device (Local supply)
32 Isolating valve (Local supply)
33 Magnetic filter (Local supply) (Recommended)
34 Strainer (Local supply)
35 Inlet control group *1
36 Filling loop (Ball valves, check valves and flexible hose) *1
37 Potable expansion vessel *1
*1 Supplied with UK model ONLY. Please refer to PAC-WK01UK-E Installation Manual for more information on accessories.
OCH570
<EHST20*-*M**C*>
(Split model system)
22
10
A
B
7
15
EHST20C- EHST20C- EHST20C-
VM2C *M6/9 C
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
(UK split / packaged model system)
<EHPT20X-*M**C*>
(Packaged model system)
<EH*T20*-MHCW>
(UK split/packaged model system)
9
11
1
5
6
<EHPT20X-*M**C*>
19
(Packaged model system)
18
12
20
23
17
24
<Figure 4-1>
EHST20*- EHST20D- EHST20D-
*M*EC MEC VM2C
— — —
— — —
—
— —
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<Table 4-1>
7
A
B
4
7
EHPT20X- EHPT20X- EHPT20X-
MHC VM2C *M6/9 C MHCW
—
—
— —
— —
— —
—
— —
— — —
— —
— — —
— — —
— — —
— — —
— — —
— — —
— — —
— — —
— — —
21
12
EHST20*-
MHCW
—
—
—
—
—
— —
— —
—
— —
— —
— —
— —
— —
— —
— —
— —
— —