5. Starting up the product
Do not start the booster system until all pumps have been properly primed.
Do not allow the pump to run for more than 5 minutes before it delivers water as the heat generated will damage the product.
5.1 Supplement to quick guide
These instructions are a supplement to the quick guide for CMBE and CMBE TWIN.
QR98388184
http://net.grundfos.com/qr/i/98388184
5.2 Priming and venting the product
Follow this procedure for each pump in the booster system:
1.
Close the isolating valve on the outlet side.
2.
Open the isolating valve on the inlet side.
3.
Remove the priming plug.
4.
Fill the pump with water until a steady stream of liquid runs out of the filling hole.
5.
Let all air out of the system.
6.
Fit and tighten the priming plug.
5.3 Adjusting the diaphragm tank pressure
1.
Check the precharge pressure in all diaphragm tanks. The correct precharge pressure is 0.7 times the required outlet pressure (setpoint).
Measure the precharge pressure while the system is pressureless.
2.
Adjust the precharge pressure. Always use nitrogen gas to refill the tanks.
Related information
8.1.3 Setting the pressure of the booster system
9.3 Refilling the diaphragm tank
5.4 Starting up the booster system
1.
Open all isolating valves.
2.
Make sure that the water supply is sufficient on the inlet side of the pump.
Venting may be necessary. This is done by carefully unscrewing the priming plug and letting out the air trapped inside the pump.
3.
Switch on the power.
4.
Open some water taps so that one or both pumps start. If they do not start, press the
Start/Stop
button on both pumps.
5.
Let the booster system run for 30 seconds to let all remaining air out of the system.
6.
The pumps are factory set, so the booster system pressure will stabilise at factory setpoint and Grundfos Eye will show a steady green
light.
7.
If the pressure is not stabilised, the booster system will stop and restart. If the booster system stops and restarts more than five times, turn
off both pumps by pressing their
Start/Stop
button. Prime the pumps again. Start the system by pressing the
Start/Stop
button
on both pumps.
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English (GB)
