10
Number
Component
1
Control and electrical box
2
Main controller
3
Manometer
4
Expansion vessel
5
Expansion vessel charge valve
6
Automatic air vent
7
Booster heater
8
Drain cock
9
Water circulation pump
10
Pressure relief valve
11
Flow switch
12
Plate heat exchanger
13
Strainer valve
14
Drain pan
A
Inlet from space heating/Indirect DHW tank (pri-
mary return)
B
Outlet to space heating/Indirect DHW tank
(primary fl ow)
C
Refrigerant (Liquid)
D
Refrigerant (Gas)
E
Discharge from pressure relief valve (installer to
pipe connect to suitable drain point)
1
2
3
<ERSC> (Split model system for heating and cooling)
4
6
5
7
8
9
11
10
12
13
E
14
A
B
C
D
Figure 4-7
Figure 4-8
OCH532A
