Product Description; Applications; Identification - Grundfos 189 Notice D'installation Et De Fonctionnement

2. Product description

2.1 Applications

The vacuum change-over device 189 ensures a continuous gas
supply for gas dosing systems by switching over from the empty
supply battery to a standby battery of gas cylinders or drums.
The vacuum change-over device is operable without auxiliary
power. From which battery the gas is supplied, is indicated
visually at the device. As an option, the change-over position can
be remote indicated via two reed contacts.
If the vacuum rises to a value of about 2-3 m WC (78-118" WC),
which can be caused by an empty or closed supply battery, the
change-over function is triggered.
The change-over device can be used in connection with the
VGA 113, VGA 117, VGS 141 gas dosing units and the VGA 111
and VGS 146 vacuum regulators.
2.1.1 Intended use
The vacuum change-over device 189 is used for combination of
two vacuum regulators with one or more dosing regulators. The
product must only be used for gaseous Cl
allowed medium is specified on the nameplate. See section
2.2.1 Nameplate. The installation and operation of the product
must strictly comply with the instructions of this manual.
2.1.2 Improper operating methods
Warning
Improper use, misuse or misapplication can lead to
personal injury and damage to the equipment!
The operational safety of the product is only guaranteed, if it is
used in accordance with section
The product must not be used for:
• operation in potentially explosive areas
• media that are not specified on the nameplate
• combustible media.
The product must not be used in case of:
• visible damage of the product
• improper repair
• unauthorized modification.
or gaseous SO . The
2 2
2.1.1 Intended use.

2.2 Identification

2.2.1 Nameplate
1
96681740 Type: -189
2
S/N: 11107658
3
Cl2
96681740P11133311107658
7
Fig. 1 Nameplate
Pos. Description
1 Product number
2 Serial number
3 Allowed medium
4 Model
5 Code for year and week of production
6 Marks of approval
7 Country of origin
4
5
6
5