4.10 Filling The Heating System; Water Treatment In The Heating Circuit - DeDietrich AWHP-2 MIT-IN-2 iSystem Installation And Service Manual

4. Installation

4.10 Filling the heating system

40
Pressure gauge
4
Automatic air vent
7
Isolating valve
9
Automatically regulated electronic pump for direct heating
11a
circuit
Pump for heating circuit with mixing valve
11b
Closed expansion vessel
16
Drain cock
17
Filling the heating circuit
18
Exterior temperature sensor
21
Boiler temperature sensor
22
Mixing valve outlet temperature sensor
23
DHW calorifier exchanger primary inlet
24
DHW calorifier heat exchanger primary outlet
25
DHW load pump
26
Non-return valve
27
Domestic cold water inlet
28
Pressure reducer if supply pressure exceeds 80 % of the
29
safety valve pressure setting
Calibrated and sealed safety unit
30
Domestic hot water temperature sensor
33
Primary pump
34
Safety thermostat
44
Disconnector
50
Thermostat valve
51
Differential valve
52
Domestic hot water circulation loop return
56
Domestic hot water outlet
57
Direct heating circuit
64
Heating circuit with mixing valve
65
Heat transfer fluid container
89
Thermostatic distribution valve for each zone
115
4.10.1.

Water treatment in the heating circuit

In a number of cases, the heat pump and the central heating system
can be filled with normal tap water and no water treatment is
necessary.
AWHP-2 MIT-IN-2 iSystem
25/06/2014 - 7616371-001-04