Grundfos iGRID P-Zone, Installation And Operating Instructions Manual, Page: 18 / 80

English (GB)
18
5.5 Replacing a pressure sensor in the pipe system
1. Ensure that the fixture tap between the pipe system
measuring tube and pressure sensor is closed.
2. Dismantle the wiring connections to the pressure sensor, and
replace the sensor with a new pressure sensor. Remember to
wrap packing yarn around the threads of the pressure sensor
before installing it.
3. Install the pressure sensor wires, and open the fixture tap.
4. Check that the sensor has been connected correctly without
leakage.
5.6 Replacing a temperature sensor
1. Loosen the temperature sensor locking screw.
2. Remove the temperature sensor.
3. Dismantle the wiring connections to the temperature sensor.
4. Install the new temperature sensor.
5. Install the wiring connections to the new temperature sensor.
5.7 Completing service
6. Taking the product out of operation
6.1 The pit is removed from the hole
1. Close the main supply valves.
2. Drain the system of district heating water.
3. Disconnect the power from the distribution supply board.
4. Disconnect and remove the supply pipes to the pit.
5. Ensure that soil is removed down to the base plate of the pit.
6. Disconnect the pit from the district heating pipes.
7. Lift the pit out of the hole.
8. Ensure that open pipes are sealed.
9. Ensure that the hole is covered with soil and re-establish the
area.
6.2 The pit remains in the hole
1. Close the main supply valves.
2. Drain the system of district heating water.
3. Disconnect the power from the distribution supply board.
4. Disconnect and remove the supply pipes to the pit.
5. Disconnect the pit from the district heating pipes.
6. Ensure that open pipes are sealed.
7. Fill the pit with sand.
8. Ensure that the hole is covered with soil and re-establish the
area.
7. Disposing of the product
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
The crossed-out wheelie bin symbol on a product
means that it must be disposed of separately from
household waste. When a product marked with this
symbol reaches its end of life, take it to a collection
point designated by the local waste disposal
authorities. The separate collection and recycling of such
products will help protect the environment and human health.
– Ensure that the cover is properly closed. Check
and remove foreign bodies, if any.
– The cover and locking device must be operated
by the same person.
– The cover and locking device must only be used
when no persons are in the pit.
– Damage to the cover must be remedied
immediately. Contact Grundfos.
WARNING
Steam
Death or serious personal injury
- Ensure that the valves in the pipelines are open.
WARNING
Falling hazard
Death or serious personal injury
- Stand at a safe distance when the cover is closed.
- Ensure that the cover has been properly closed
and locked when work in the pit has been
completed.
DANGER
Falling hazard
Death or serious personal injury
- Ensure to mark off the area around the pit.
- Follow local regulations when working at the pit.
WARNING
Falling hazard
Death or serious personal injury
- Ensure that the cover has been properly opened
and secured against closing while work is
performed in the pit.
- Use personal protective equipment when working
in the pit.
- Follow local regulations when working in the pit.
WARNING
Risk of scalding
Death or serious personal injury
- Isolate and drain the district heating water from the
product before dismantling it.
WARNING
Electric shock
Death or serious personal injury
- Disconnect the power supply before starting any
electrical work or in the event of the pit being
flooded. Lock the disconnecting device to avoid
unintentional reconnection.
WARNING
Crushing hazard
Death or serious personal injury
- Ensure that everything is disconnected and that
the pit including the base plate is fully uncovered.
- Check lifting eyes for visible damage.
WARNING
Crushing hazard
Death or serious personal injury
- Check that the lifting equipment can lift the load
before lifting the pit. See the weight on the
nameplate.