Ambient And Operating Conditions; Dosing Medium; Applications - Grundfos DDI 222 Instrucciones De Instalación Y Funcionamiento

1.3.9 Ambient and operating conditions

• Permissible ambient temperature: 0 °C to +40 °C.
• Permissible storage temperature: -10 °C to +50 °C.
• Permissible air humidity: max. relative humidity:
92 % (non-condensing).
Warning
The DDI 222 is NOT approved for operation in
potentially explosive areas!
The installation site must be under cover!
Ensure that the enclosure class of motor and pump is
not affected by the atmospheric conditions.
Caution
Pumps with electronics are only suitable for indoor
use! Do not install outdoors!

1.3.10 Dosing medium

Warning
The pump must be equipped with a diaphragm
leakage detection when used for crystallising media.
In the event of questions regarding the material
resistance and suitability of the pump for specific
Caution
dosing media, please contact Grundfos Water
Treatment.
The dosing medium must have the following basic characteristics:
• liquid
• non-abrasive
• non-inflammable.
Maximum permissible viscosity at operating temperature*
Maximum viscosity*
Normal
Pump type
operation
[mPa s]
Standard
DDI 60-10 100
DDI 150-4 100
Standard with Flow Monitor
DDI 60-10 70
DDI 150-4 50
HV variant with/without Flow Monitor
DDI 60-10 1200
DDI 150-4 700
* The stated values are approximate values and apply to
Newtonian liquids.
Note that the viscosity increases with decreasing temperature!
6
Slow-mode-1 Slow-mode-2
operation operation
[mPa s] [mPa s]
200 500
200 500
100 200
100 200
2000 3000
1200 1800
Permissible media temperature
Min. media
Dosing head
temperature
material
[°C]
PVC
Stainless steel,
-10
DIN 1.4571*
PP
PVDF** -10
* A temperature of 120 °C at a counter-pressure of max. 2 bar is
permitted for a short period (15 minutes).
** At 70 °C, the maximum counter-pressure is 3 bar.
Warning
Observe the chemical manufacturer's safety
instructions when handling chemicals!
The dosing medium must be in liquid form!
Caution
Observe the freezing and boiling points of the dosing
medium!
The resistance of the parts that come into contact
with the media depends on the media, media
temperature and operating pressure. Ensure that
parts in contact with the media are chemically
Caution
resistant to the dosing medium under operating
conditions!
Make sure that the pump is suitable for the actual
dosing medium!

1.4 Applications

1.4.1 Appropriate, acceptable and correct usage
The DDI 222 pump is suitable for liquid, non-abrasive and
non-inflammable media strictly in accordance with the
instructions in this manual.
Warning
Other applications or the operation of pumps in
ambient and operating conditions, which are not
approved, are considered improper and are not
permitted. Grundfos accepts no liability for any
damage resulting from incorrect use.
Max. media
temperature
p < 10 bar
[°C]
0 40
70
0 40
60*