Mitsubishi Electric EHST20C-VM6HB Service Manual page 8

<EHST20C-VM6SB> (Solar split model system)
B
C
D
E
J
K
8
9
11
17
14
18
Figure 4-3
<EHPT20X-VM2HB> (UK Packaged model system)
B
E
G
H
8
9
11
17
14
Figure 4-4
OCH531
A
F
2
1
19
3
4
5
10
12
13
15
16
A
F
2
1
19
3
4
5
6
10
12
7
13
15
16
Number Component
1 Automatic air vent
 Pressure relief valve
Expansion vessel

4 Main controller
Control and electrical box
5
8 DHW tank
3-way valve
9
10 Water circulation pump
11 Manual air vent
1 Booster heater
1 Drain cock (Booster heater)
14 Strainer valve
Flow switch
15
16 Drain cock (Primary circuit)
17 Drain cock (DHW tank)
Plate heat exchanger
18
19 Manometer
A DHW outlet
Cold water inlet
B
C Outlet to solar
D Inlet from solar
Inlet from space heating
E
F Outlet to space heating
Refrigerant (Gas)
J
Refrigerant (Liquid)
K
Number Component
1 Automatic air vent
 Pressure relief valve
Expansion vessel

4 Main controller
Control and electrical box
5
6 Temperature and pressure relief valve (not visible)
7 Immersion heater
8 DHW tank
3-way valve
9
10 Water circulation pump
11 Manual air vent
1 Booster heater
1 Drain cock (Booster heater)
14 Strainer valve
Flow switch
15
16 Drain cock (Primary circuit)
17 Drain cock (DHW tank)
19 Manometer
A DHW outlet
Cold water inlet
B
Inlet from space heating
E
F Outlet to space heating
G Inlet from heat pump
H Outlet to heat pump
8