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Filling
50 Instruction manual SGE
5
gis
Caution
The installation diagram shows a pump station with an integrated non-return
valve. This type of pump unit may only be used with closed systems. In systems
with drain-back, installation of a pump unit with non-return valve is prohibited.
There are special pump units for these systems. Please contact the pump unit
supplier for this.
5.1 Filling unvented
installations
Caution
The installation diagram shows a pump station with an integrated non-return
valve. This type of pump unit may only be used with closed systems. In systems
with drain-back, installation of a pump unit with non-return valve is prohibited.
There are special pump units for these systems. Please contact the pump unit
supplier for this.
To fill the water heater, proceed as follows:
1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves
(4) for the circulation pump (6).
2. Close the drain valve (9).
3. Open the nearest hot water draw-off point (14).
4. Open the valve of the inlet combination (2) so that cold water flows into the
water heater.
5. Completely fill the water heater. When a full water jet flows from the nearest
draw-off point, the water heater is full.
6. Bleed the entire installation of air, for example by opening all draw-off points.
7. The water heater is now under water supply pressure. There should now be
no water coming out of the inlet combination expansion valve or out of the
T&P valve (3). If there is, the cause might be:
- The water supply pressure is greater than the specified 8 bar.
Rectify this by fitting a pressure reducing valve (1).
- The expansion valve in the protected cold supply set-up is defective or
incorrectly fitted.
- The T&P valve is defective, or incorrectly installed.
5.2 Filling vented
installations
To fill the water heater, proceed as follows:
1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves
(4) for the circulation pump (6).
2. Close the drain valve (9).
3. Open the nearest hot water draw-off point (14).
4. Open the stop valve (4) on the cold water side (A) so that cold water flows
into the water heater.
5. Completely fill the water heater. When a full water jet flows from the nearest
draw-off point, the water heater is full.
6. Bleed the entire installation of air, for example by opening all draw-off points.
7. The water heater is now under water supply pressure. There should be no
water coming out of the T&P valve (3). If this does happen, the T&P valve
might be defective or incorrectly fitted.