Alpha-InnoTec LWDV - System Flushing, Filling, and Venting; Heating Water Quality Standards; Flushing and Venting the Heating Circuit

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Subject to technical amendments without prior notice | 83055800cUK – Translation of the operating manual | ait-deutschland GmbH
8 Flushing,llingandventing
8.1 Heating water quality
NOTE
● Detailed information is also provided in
the VDI Guideline 2035 “Vermeidung von
Schäden in Warmwasserheizanlagen”
(Preventing damage in hot water heating
systems).
● Required pH value: 8.2 to 10
● For aluminium materials: pH value: 8.2 to 8.5
► Fill the system only with demineralized heating
waterorVDI2035water(low-saltoperationofthe
system).
Advantages of low-salt operation:
● Low corrosion properties
● No development of scale
● Ideal for closed heating circuits
● IdealpHvalueduetoself-alkalisation afterlling
the system
● If necessary, simple alkalisation to a pH value of
8.2 by adding chemicals
8.2 Flushing,llingandventing
the heating circuit
 The outlet pipe of the safety valve is connected.
► Ensure that the response pressure of the safety
valve is not exceeded.
NOTE
The venting programme on the controller can
alsobeusedtosupporttheushingandvent-
ing process. It is possible to control individual
circulation pumps and even the changeover
valve via the venting programme. As a result
it is not necessary to remove the valve motor.
1. Vent the system at the highest point.
2. Vent the heat pump at the hydraulic connection set.
9 Insulation of hydraulic
connections
Insulate hydraulic lines in accordance with the local
regulations.
1. Openshut-o󰀨devices.
2. Perform a pressure test and check for leaks.
3. Insulate external piping on site.
4. Insulateallconnections,ttingsandpipes.
5. Insulate the condensate drain in a frost-proof
manner.
6. The device must be completely closed on all sides
to ensure rodent protection.
10 Settingtheoverowvalve
NOTE
● The activities in this section are only necessary
for integration of the storage tank in series.
● Complete the work steps quickly, otherwise
the maximum return temperature could be
exceeded and the heat pump will switch to
high-pressure fault.
● Turn the rotary-push button on the overow
valve to the right to increase the temperature
di󰀨erence(thespread),turnittothelefttore-
duce it.
 Thesystemisrunninginheatingmode(ideallyin
cold condition).
If the storage tank is integrated in series, the IBN – as-
sistantallowsyoutoadjusttheoverowvalveaccord-
ing to to the hydraulic system.