Bühler technologies NS 1-G1/2-AM Notice De Montage page 7

NS 1-G1/2-AM
4 Installation and connection
4.1 Mechanical installation
CAUTION
Oil leak
Damaged sight glass
Ensure the bypass tank, particularly the sight glass, is not
damaged by external forces.
NOTICE
The level switch must be mounted vertically to the tank to al-
low the float to move freely.
The mounting surface on the tank must have a minimum
surface quality of R = 6.3. If the surface quality is inad-
max
equate, leaks may occur.
The level switches come fully assembled and can be mounted
to the tank with G1/2 hollow screws.
Proceed as follows:
• Install the bypass tank (1) in the planned position:
Ensure the O-rings (4) are correctly seated in the grooves
on the bypass tank.
• Insert the two G1/2 hollow screws (2) all the way through
the respective G3/4 opening and firmly secure to the tank.
• The screw the two VSTI plugs (3) firmly into the G3/4
threads on the tank.
BX200006 ◦ 01/2022
1 Bypass tank
3 VSTI plugs
5 Mounting surface (note
surface quality)
7 Spanner size SW12
9 Float
CAUTION
Oil leak
Removing the level switch
When removing the level switch, ensure there is no fluid left
in the tank or could leak from the tank.
Note: After removing the float, be sure the magnet inside the
float is above the fluid level. This can easily be verified with a
piece of iron to determine the magnet position inside the
float.
4.2 Electrical connections
For devices with 230 V mains voltage:
DANGER
Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to
mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
The connection voltage is 24 V DC or 230 V AC (rated values). It
connects with plugs. Please refer to the drawing in the ap-
pendix for the pin assignment.
Depending on the order specifications, the level contacts are
"falling NO contact (NC)", "falling NC contact (NO)" (contact
type K8) or changeover contacts (contact type W9) and moun-
ted in the specified position. The position can be changed
later (see chapter Adjusting the level contacts [} 7]). The
contact logic assumes the level switch is installed with the
tank empty, meaning it is only in the operating position once
the tank has been filled.
4.3 Adjusting the level contacts
The contacts for level measurement are locked into a bent rail
inside the protective tube. They are positioned as specified in
the purchase order, but can be moved to any position if neces-
sary.
For devices with 230 V mains voltage:
DANGER
Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to
mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
2 G1/2 hollow screws
4 O-rings
6 Hexagon nut SW36
8 Magnet
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