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21
Installation components
12
Air vent
13
Thermometer sleeve
14
Flexible connection
15
Check valve
16
System water drain plug (on connection pipe supplied in the unit)
17
Pressure gauge
18
Freeze-up protection bypass valve (when valve No. 15 are closed during
winter)
19
Charge valve
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Hydronic module (unit with hydronic module)
Note:
Units without hydronic module (option) are equipped with a flow switch and an
internal piping heater.
Legend
Components of the unit and hydronic module
1
Victaulic screen filter
2
Expansion tank
3
Safety valve
4
Available pressure pump
5
Purge valve and pressure tap
6
Pressure gauge to measure the plate heat exchanger pressure drop (to be
isolated with valve No. 5 if not used)
7
System air vent
8
Flow switch
9
Flow control valve
10
Plate heat exchanger
11
Evaporator defrost heater
Typical hydronic circuit diagram
1
2
3
4
5
6
7
5
8
10
11
9
18
15
17
14
14
17
15
16
13
19
13
12
Hydronic module
Summary of Contents for 30RA040B
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