Pump With Dosing Pump - Grundfos CRI series Montage- Und Betriebsanleitung

Grundfos.book Page 9 Monday, January 27, 2014 9:37 AM

9.2 Pump with dosing pump

Warning
Pay attention to the orientation of the vent holes, and take care to ensure that the escaping liquid does not cause
personal injury or damage to the motor or other components.
When handling hot or hazardous liquids, special attention should be paid to the risk of personal injury.
When pumping flammable liquids, beware of static discharges. The funnel, for instance, should be earthed!
Illustration Step Action
Connecting the barrier fluid supply pipe
• Connect one end to the seal chamber (pos. E, fig. 1, 2 or 3).
PS
• Connect the other end to the outlet of the dosing pump.
1
Recommended pressure
1,5 - 2 bar
• Set the start pressure of the dosing pump to a pressure 1.5 to 2 bar
PS
above the highest pressure the pump can deliver.
(P
pump
2
Filling and venting the seal chamber
• Start the dosing pump.
PS
• Fill and vent the seal chamber by means of the vent screw at the top
of the seal chamber (pos. C/D, fig. 1, 2 or 3).
3
The dosing pump will stop automatically when the pressure set in
step 2 has been reached.
Operation with positive inlet pressure
• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.
• Close the isolating valve on the discharge side.
• Open the isolating valve on the inlet side.
• Slowly fill the pump with the liquid to be pumped.
PS
When the liquid starts running out of the vent hole, immediately close
the vent screw.
4
Operation with suction lift
• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.
• Close the isolating valve on the discharge side.
• Fill the pump and the inlet pipe with the liquid to be pumped using a
funnel.
• When the liquid starts running out of the vent hole, immediately close
the vent screw.
Note: A non-return valve must be fitted to the inlet pipe.
Starting up the pump
• See also the installation and operating instructions for standard CR,
CRI, CRN pumps.
PS
• Open the isolating valve on the discharge side.
• Start the pump, and check the direction of rotation.
5
See the correct direction of rotation on the motor fan cover.
• After a few minutes, vent the pump again by means of the air vent
screw (pos. A, fig. 1, 2 or 3).
+ P + P < P )
inlet 1.5 - 2.0 dosing max.
9