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Technical information
11.2.4 Explanation of symbols
Symbol
Description
Pipework/cables
Flow - heating/solar
Return - heating/solar
Brine flow
Mixing valves/valves/temperature sensors/pumps
Valve
Revision bypass
Flow regulating valve
Overcurrent valve
Filter shut-off valve
Cap valve
Valve, motorized
M
Valve, thermal
T
Shut-off valve, magnetically
controlled
Miscellaneous
Thermometer
T
Pressure gauge
Filling/draining
Water filter
Heat meter
000
∏
J
DHW outlet
Relay
R
Immersion heater
Table 10 Hydraulic symbols
26
Symbol
Description
Brine return
Potable water
Hot water
Differential pressure regulator
Pressure Relief Valve
Safety assembly
3-way mixing valve
M
(mixing/distribution)
DHW mixer,
T
thermostatic
3-way mixing valve
M
(changeover)
I
3-way mixing valve (change over,
de-energised when closed to II)
M
II
III
3-way mixing valve (change over,
AB
de-energised when closed to A)
A
M
B
4-way mixing valve
M
Drain outlet with siphon
System separation according to
EN1717
Expansion vessel with
cap valve
Magnetite separator
Air separator
Automatic air vent valve
Expansion joint
Symbol
Description
DHW circulation
Electrical Wiring
Electrical wiring with break
Pump
Non-return valve
Temperature sensor / switch
Safety temperature limiter
Flue gas temperature sensor/
switch
Flue gas temperature limiter
Outdoor sensor
Wireless outside temperature
sensor
...wireless...
Low loss header with sensor
Heat exchanger
Flow rate measuring device
Water sink
Heat. circ.
Underfloor heating circuit
Low loss header
Compress 3000 AWES – 6720892204 (2020/06)
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