Starting Up The Product; Priming - Grundfos CR 1s Instrucciones De Instalación Y Operación

10. Starting up the product

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.
- Pay attention to the direction of the vent hole when
you fill the pump with liquid and vent it.
- Make sure that no persons are hurt by the
escaping liquid.
Fill the pump with liquid and vent it before you start
the pump.
Pay attention to the direction of the vent hole during
liquid filling and venting. Make sure that the escaping
liquid does not cause damage to the motor or other
components
If the pump runs dry, the pump bearings and the
shaft seal may be damaged.

10.1 Priming

To prime the pump in a closed system or an open system where
the water source is above the pump, close the pump isolating
valve(s) and open the priming plug on the pump head. See fig.
13, fig. 14, and fig. 15.
Drain plug
Bypass
valve
Inlet
Drain plug
Fig. 13 Position of plugs and bypass valve
20
In open systems where the water level is below the pump inlet,
the inlet pipe and pump must be filled with liquid and vented
before starting the pump.
1. Close the outlet isolating valve and remove the priming plug.
2. Pour water through the priming hole until the inlet pipe and
3. Replace the priming plug and tighten securely.
Priming vent plug
CR(I)(N) 1s, 1, 3, 5,
10, 15, 20
CRT 2, 4, 8, 16
Outlet
Priming plug
(Opposite side)
Inlet
Drain plugs (G 1 1/2 A) with 1/4" NPI gauge/sensor
taps
Fig. 14 Position of plugs CR, CRN 32, 45, 64
Loosen
center plug
to vent
pump
Fig. 15 Vent plug
pump are completely filled with liquid. If the inlet pipe does not
slope downwards away from the pump, the air must be purged
while priming the pump.
Vent plug
Outlet
Vent plug