Startup; Pump With Pressure Intensifier - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

9. Startup

9.1 Pump with pressure intensifier

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
8
Step Action
Operation with positive inlet pressure
•
•
•
•
1
Operation with suction lift
•
•
•
•
Note: A non-return valve must be fitted to the inlet pipe.
Filling the seal chamber
• Fill the intensifier and the seal chamber with barrier fluid, and
2
p
1,5 - 4 bar
f
p
f
p
s
* p
0.1 to 5 bar higher than the atmospheric pressure.
Venting
During filling, the seal chamber and the intensifier must be vented:
• Use the vent screw at the top of the seal chamber (pos. C/D, fig. 1,
3
Disconnecting the barrier fluid supply pipe
• Disconnect the barrier fluid supply pipe from the intensifier.
4
Starting up the pump
• See also the installation and operating instructions for standard CR,
• Start the pump, and check the direction of rotation.
5
• After a few minutes, vent the pump again by means of the vent screw
Open the vent screw (pos. A, fig. 1,
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.
When the liquid starts running out of the vent hole, immediately
close the vent screw.
Open the vent screw (pos. A, fig. 1,
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.
connect the barrier fluid supply pipe to the unused inlet of the
intensifier (pos. 4, fig. 5). The pressure in the seal chamber must
always be 1.5 to 4 bar higher than the pump pressure when the pump
is not operating.
= p * + 1.5 to 4 bar.
s
= To be read on the pressure gauge on the intensifier (pos. 8, fig. 5).
= To be read on the pressure gauge in the connection pipe
(pos. 9, fig. 5) between intensifier and pump.
= inlet pressure when the pump is not operating; must always be
s
or 3) and the vent screw at the top of the intensifier (pos. 6, fig. 5).
CRI, CRN pumps.
See the correct direction of rotation on the motor fan cover.
(pos. A, fig. 1, 2 or 3).
2 or 3) on the side of the pump
2 or 3) on the side of the pump
2