Adjusting The Diaphragm Tank Pressure; Installation Altitude; Electrical Connection - Grundfos CMBE Montage- Und Betriebsanleitung

4.2 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.
Related information
4.1 Mounting the tank
9. Servicing the product

4.3 Installation altitude

The installation altitude is the height above sea level
of the installation site.
• Products installed up to 1000 m above sea level
can be loaded 100 %.
• The motors can be installed up to 3500 m above
sea level.
Motors installed more than 1000 m above
sea level must not be fully loaded due to
the low density and consequent low
cooling effect of the air.
The motor output power (P2) in relation to the altitude
above sea level is shown in the graph below.
P2 [%]
100
90
80
70
60
0 500 1000 1500 2000 2500 3000 3500
Derating of motor output (P2) in relation to altitude
above sea level
Pos. Description
x Altitude [m]
Related information
12.1.4 Ambient temperature during operation
10

5. Electrical connection

DANGER
Electric shock
Death or serious personal injury
‐
In case of an insulation fault, the fault
current may be a DC or pulsating
DC.Observe national legislation about
requirements for and selection of
Residual Current Device (RCD) when
installing the product.
WARNING
Electric shock
Death or serious personal injury
‐
Carry out the electrical connection in
accordance with local regulations.
WARNING
Electric shock
Death or serious personal injury
‐
Check that the power plug delivered
with the product is in compliance with
local regulations.
‐
The protective earth of the power outlet
must be connected to the protective
earth of the product. The plug must
therefore have the same PE
connection system as the power outlet.
If not, use a suitable adapter if allowed
by local regulations.
‐
Provide protection against indirect
contact in accordance with local
regulations.
‐
Make sure all earth connections are
established correctly before switching
on the power supply.
‐
The user or the installer is responsible
for correct earthing and protection
according to local regulations.
‐
The installer is responsible for potential
X
compensation.
‐
Work must be carried out according
to IEC 60204-1:2016.
WARNING
Electric shock
Death or serious personal injury
‐
A supply disconnecting device made
according to EN 60204-1 5.3.2 must be
provided with means permitting it to be
locked in the OFF (isolated) position.
This device must also be installed in a
position according to EN 60204-1,
5.3.4.