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7.9.2
72
Flushing with water
1.
Connect a water supply to the filling point of the pump station.
2.
Connect a drain hose to the drain point.
3.
Open the taps of both supply and drain point.
4.
Open the water supply tap.
5.
Allow the system to spool through until no further contamination comes out of the
drain hose.
6.
Then shut off the water supply.
7.
Drain all remaining water from the system.
8.
Now you can fill the system with glycol.
Filling with glycol
1.
Insert the hose of the glycol pump into the jerry can containing the glycol.
2.
Connect the pump to the jerry can.
3.
Connect the hose of the glycol pump to the inlet combination of the pump station.
4.
Open the valve of the inlet combination.
5.
Plug the glycol pump into a mains socket.
6.
Start the glycol pump using the ON/OFF switch on the glycol pump.
7.
Stop the glycol pump as soon as the pressure gauge on the pump station begins to
rise.
8.
Completely bleed the system of air at the air bleed point (26, see installation
diagram).
9.
Close the air bleed when no further air comes out.
10.
Use the service menu to switch the pump on (see section 9.2.8.2).
Note
To ensure that the solar heating system is properly filled, the pump in the solar heating
system can be switched on for 2 minutes using the service menu.
11.
Repeat steps 6 through 9 until glycol runs out of the air bleed (26).
Note
If an installation does not have a drain-back system, then it should be filled up to
pressure (1.5 bar).
If an installation does have a drain-back system, then it should not be pressurised. For
the installation, filling and drainage of a drain-back system, please refer to the installation
manual and users manual of the solar collectors.
12.
Switch off the glycol pump.
13.
Close the valve of the inlet combination and disconnect the glycol pump (including
the hoses).
Note
Dispose of the residual glycol in the filler hose in an environment-friendly manner, and
according to local regulations.
Procedure for checking the supply pressure
To check the supply pressure, proceed as follows:
1.
Isolate the appliance from the power supply (see section 4.2.2).
2.
Carefully remove the covers from the appliance.
3.
The electrical section is now visible.
HWH 32-220 to 63-370
4.
There is a test nipple before the gas control valve (for natural gas appliances) or
before the pressure-reducing valve (for LPG appliances) so that the supply pressure
can be measured.
This test nipple has a sealing screw. Loosen the sealing screw by a few turns. Do not
completely loosen it as it can be difficult to retighten.
Installation, Maintenance and Service part
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