Mitsubishi EHPT20X-MHCW, Service Manual

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11
PART NAMES AND FUNCTIONS
4
<Table 4-1>
21
B
A
<EH*T20*-MHCW>
(UK split / packaged model system)
7
4
12
<EHPT20X-*M**C*>
(Packaged model system)
<EHST20*-*M**C*>
(Split model system)
<E*ST20*-*M**C>
<E*ST20*-*M**CR1>
(Split model system)
No. Part name
E*ST20*-
*M2/6/9C
E*ST20*-
*M2/6/9EC
E*ST20*-MEC EHST20D-MHC
EHPT20X-
*M2/6/9C
EHPT20X-
MHCW
EHST20*-
MHCW
E*ST20*-
*M2/6/9CR1
E*ST20*-
*M2/6/9ECR1
E*ST20*-MECR1 EHST20D-MHCR1
EHPT20X-
*M2/6/9CR1
EHPT20X-
MHCWR1
EHST20*-
MHCWR1
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 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.
<Note> For installation of E*ST20*-*M*EC model, make sure to install a primary-side expansion vessel in the field. (See figure 4.3.4 in Installation Manual.)
<EH*T20*-MHCW>
<EH*T20*-MHCWR1>
(UK split/packaged model system)
<EHPT20X-*M**C*>
<EHPT20X-*M**C*R1>
(Packaged model system)
22
A
B
10
9
11
1
5
6
19
18
12
20
23
17
24
7 15
D
8
2
16
4
13
3
14
C
E/H
F/G
<Figure 4-1>
OCH570C