Taking The Product Out Of Operation; Frost Protection; Taking The Product Permanently Out Of Operation - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

7. Taking the product out of operation

7.1 Frost protection

CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Pay attention to the direction of the vent
hole and drain plug when draining the
pump. Make sure that the escaping
liquid does not cause injury to persons.
- Wear personal protective equipment.
Pay attention to the direction of the vent
hole and drain plug when draining the
pump. Make sure that the escaping liquid
does not cause damage to the motor or
other components.
Drain pumps which are not being used during
periods of frost to avoid damage.
To drain the pump loosen the vent screw in the pump
head and remove all drain plugs from one side of the
pump base.
Do not tighten the vent screw and replace the drain
plug until the pump is to be used again.
CR, CRI, CRN 1s to 5
Before replacing the drain plug in the base, screw
the bypass valve out against the stop. See fig. 18.
Fig. 18 Location of drain plug and bypass valve
Fit the drain plug by tightening the large union nut
followed by the bypass valve.
18
Drain plug
Bypass valve
7.2 Taking the product permanently out of
operation
Observe the following if the pump is to be
permanently taken out of operation and removed
from the pipe system.
DANGER
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
WARNING
Falling objects
Death or serious personal injury
- Follow the lifting instructions.
- Use lifting equipment which is approved
for the weight of the product.
- Persons must keep a safe distance to
the product during lifting operations.
- Wear personal protective equipment.
For lifting instructions, see section
product.
WARNING
Falling objects
Death or serious personal injury
- Keep the product in a stable and fixed
position when working on it.
WARNING
Corrosive liquids
Death or serious personal injury
- Wear personal protective equipment.
WARNING
Toxic liquids
Death or serious personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold liquid
Minor or moderate personal injury
- Wear personal protective equipment.
CAUTION
Hot or cold surface
Minor or moderate personal injury
- Make sure that no one can accidentally
come into contact with hot or cold
surfaces.
2.4 Lifting the