Filling And Purging The Brine Circuit - Vaillant flexoTHERM exclusive VWF 57/4 Installation And Maintenance Instructions Manual

–
Fernox F2
–
Sentinel X 100
–
Sentinel X 200
Additives for frost protection intended to remain
permanently in the system
–
Fernox Antifreeze Alphi 11
–
Sentinel X 500
▶
If you have used the above-mentioned additives, inform
the operator about the measures that are required.
▶
Inform the operator about the measures required for frost
protection.
7.1.2 Filling and purging the heating installation
1. Open all of the thermostatic radiator valves on the heat-
ing installation and, if required, all other stop valves.
2. Check all of the connections and the entire heating in-
stallation for leaks.
3. Push the white switching lever (1) on the motor head
of the diverter valve until it engages in its mid-position
in order to move the heating/cylinder charging diverter
valve into the mid-position.
◁
Both valves are open and the filling procedure is
improved since the air in the system can escape.
4. Connect a filling loop to the hot water supply.
5. Unscrew the screw cap from the heating circuit's filling
and drain valve and secure the free end of the filling
hose to here.
6. Open the filling and drain valve for the heating circuit.
7. Open the heating water supply slowly.
8. Fill with water until the pressure gauge (on-site) shows
that the heating installation has reached a pressure of
approx. 1.5 bar.
9. Close the filling and drain valve for the heating circuit.
10. Purge the heating circuit at the locations provided for
this.
11. Purge the heating pump using the heating pump's drain
screw.
12. Check the heating installation pressure again (if re-
quired, repeat the filling procedure).
13. Remove the filling loop from the filling and drain valve
and screw the screw cap back on.
0020213395_00 flexoTHERM exclusive Installation and maintenance instructions
Filling and purging the system 7
Moving the heating/cylinder charging diverter
valve into the starting position
B
14. Remove the power supply cable from the motor head of
the diverter valve.
15. Push the locking lever.
1
16. Turn the motor head by 45°.
17. Remove the motor head.
18. Turn the motor head back towards the valve body and
reconnect the power supply cable.
7.2

Filling and purging the brine circuit

7.2.1 Mixing the brine fluid
The brine fluid consists of water mixed with a concentrated
frost protection agent. The brine fluids that may be used dif-
fer greatly from region to region. For more information, con-
tact the responsible authorities.
Only the brine fluids named here are authorised by Vaillant
for operating the heat pump.
Alternatively, suitable ready-mixed fluids for heat pumps can
be ordered from Vaillant.
▶
Use a sufficiently large mixing container.
▶
Carefully mix ethylene glycol with water.
Brine content
Water content
* Cloud point
** Cold protection
C
A
Note
This moves the spring in the valve body back
into the starting position.
Note
The white switch lever on the motor head
of the diverter valve should now be in the
starting position.
Approved environment
Ground/groundwater
Above this temperature,
the first ice crystals start
to form in the brine fluid.
At this temperature, half
of the fluid volume has
frozen; there is slush ice.
45°
D
source
module
30% vol.
70% vol.
19