7. Starting up the product
WARNING
Hot liquid
Death or serious personal injury
‐
If the temperature is higher than 50 °C,
use gloves and glasses when venting
the pump to avoid risk of scalding.
WARNING
Biological hazard
Death or serious personal injury
‐
Flush the pump with clean water be-
fore first use.
Do not start the pump until it has been fil-
led with liquid.
7.1 Flushing the system
DANGER
Contaminated drinking water
Death or serious personal injury
‐
Flush the system before starting it or
after a standstill period.
Drinking water systems
Hygiene
Grundfos pressure booster systems are functionally
tested by running water through the system. During
the test, Grundfos continuously surveys the quality of
the test water. Since it is not possible to completely
drain and dry the system after the test, the system
must be rinsed or flushed thoroughly before being
taken into use in a drinking water sector due to risk of
bacteria growth. This also applies if the system has
been shut down for a long period of time. Rinsing and
flushing must always be done in accordance with
local regulations.
Contaminated drinking water endangers health.
7.2 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
7.3 Priming and venting the product
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.
7.4 Adjusting the diaphragm tank pressure
1. Check the precharge pressure in the diaphragm
tank. 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.
13
English (GB)
