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The water heater is now under water supply pressure. There should now be no water
coming out of the inlet combination expansion valve or (if used) out of the T&P valve
(3). If there is, the cause might be:
The water supply pressure is greater than the specified value (see section
12.1)
.
Rectify this by fitting a pressure reducing valve (1).
The expansion valve in the protected cold supply set-up is defective or
incorrectly fitted.
7.9.1.3 Filling the solar heating system
Note
No special safety measures are required when working with the diluted glycol solution
specified by the manufacturer. For more information about the fluid, please contact the
manufacturer.
Warning
Before filling the solar heating system to replenish the heating fluid, make
certain that:
The appliance is switched off (see section 4.2).
The solar heating system is switched off. Refer to the documentation of the
solar heating system.
The appliance has cooled down sufficiently to prevent personal injury
(burns).
w
Note
The filling procedure described in this manual is intended for the pump system supplied
by the supplier of the appliance. For any other system, you should follow the procedure
for that system.
Warning
To avoid contaminating the glycol, you should flush the solar heating system through with
water before filling.
Flushing with water
Connect a water supply to the filling point of the pump station.
Connect a drain hose to the drain point.
Open the taps of both supply and drain point.
Open the water supply tap.
Allow the system to spool through until no further contamination comes out of the
drain hose.
Then shut off the water supply.
Drain all remaining water from the system.
Now you can fill the system with glycol.
Filling with glycol
Insert the hose of the glycol pump into the jerry can containing the glycol.
Connect the pump to the jerry can.
Connect the hose of the glycol pump to the inlet combination of the pump station.
Open the valve of the inlet combination.
Plug the glycol pump into a mains socket.
Start the glycol pump using the ON/OFF switch on the glycol pump.
Stop the glycol pump as soon as the pressure gauge on the pump station begins to
rise.
Completely bleed the system of air at the air bleed point (26, see installation
diagram).
Close the air bleed when no further air comes out.
7.
-
-
n
w
1.
2.
3.
4.
5.
6.
7.
8.
1.
2.
3.
4.
5.
6.
7.
8.
9.
0311753_SGS_28-120_II_UKUK_V2.0 , 2017-05-03 71
71


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