36 Instruction manual TWI 35-130 G/TWI 45-190 G
5 Fill
5.1.1 Fill unvented installations
Proceed as follows for fi lling the device:
1. Open the stop valve (11) in the hot water pipe and (if present) the stop
valves (4) of the circulation pump (6).
2. Close the drain valve (9).
3. Open the closest draw-off point (14).
4. Open the stop valve (4) on the cold water side (A), causing cold water to
fl ow into the device.
5. Fill the device to the maximum. The device is full when the water fl ows out
of the closest draw-off point in a forceful jet.
6. Bleed the entire installation, for example by opening all draw-off points.
7. The device will now be under water piping pressure. Water should not
come out of the expansion valve (15) and out of the T&P valve (3) now.
If so, it might be that:
- The water piping pressure is larger than the required 8 bars.
Mount a pressure reducing valve (1) after all.
- The expansion valve of the protected cold supply setup is defective or
incorrectly mounted.
5.1.2 Fill vented installations
Proceed as follows for fi lling the device:
1. Open the stop valve (11) in the hot water pipe and (if present) the stop
valves (4) of the circulation pump (6).
2. Close the drain valve (9).
3. Open the closest draw-off point (14).
4. Open the stop valve (4) on the cold water side (A), causing cold water to
fl ow into the device.
5. Fill the device to the maximum. The device is full when the water fl ows out
of the closest draw-off point in a forceful jet.
6. Bleed the entire installation, for example by opening all draw-off points.
7. The device will now be under water piping pressure. Water should not
come out of the T&P valve (3) now. If so, the T&P valve may be defective
or have been mounted incorrectly.
5.1 Fill the device
