Description

About the Pump

A standard split coupling connects the pump and motor shaft. It is enclosed in the pump head/motor stool by means of two coupling guards. This Grundfos CR 15-8 pump head, pump head cover and flange for motor mounting is made in one piece. The pump head has a combined 1/2″ priming plug and vent screw.

The Grundfos CR 15-8 pump is fitted with a balanced O-ring seal unit with a rigid torque-transmission system. This seal type is assembled in a cartridge unit which makes replacement safe and easy. Due to the balancing, this seal type is suitable for high-pressure applications. The cartridge construction also protects the pump shaft from possible wear from a dynamic O-ring between pump shaft and shaft seal.

Motor

The motor is a totally enclosed, fan-cooled motor with principal dimensions to IEC and DIN standards.
The motor is flange-mounted with free-hole flange (FF).

Motor-mounting designation in accordance with IEC 60034-7: IM B 5 (Code I) / IM 3001 (Code II).
Electrical tolerances comply with IEC 60034.

The motor efficiency is classified as IE3 in accordance with IEC 60034-30-1.
The motor has thermistors (PTC sensors) in the windings in accordance with DIN 44081/DIN 44082. The protection reacts to both slow- and quick-rising temperatures, e.g. constant overload and stalled conditions.

Thermal switches must be connected to an external control circuit in a way which ensures that the automatic reset cannot cause accidents. The motors must be connected to a motor-protective circuit breaker according to local regulations.

The motor can be connected to a variable speed drive for adjustment of pump performance to any duty point. Grundfos CUE offers a range of variable speed drives.

Technical Specifications

• Pump speed on which pump data are based: 2919 rpm
• Actual calculated flow: 4.746 l/s
• Resulting head of the pump: 90.82 m
• Pump orientation: Vertical
• Shaft seal arrangement: Single
• Code for shaft seal: HQQE
• Approvals: CE,EAC,UKCA
• Approvals for drinking water: WRAS, ACS
• Curve tolerance: ISO9906:2012 3B

Electrical data

• Motor standard: IEC
• Motor type: 132SB
• IE Efficiency class: IE3
• Rated power – P2: 7.5 kW
• Power (P2) required by pump: 7.5 kW
• Mains frequency: 50 Hz
• Rated voltage: 3 x 380-415D/660-690Y V
• Rated current: 14,4-14,0/8,30-8,10 A
• Starting current: 780-910 %
• Cos phi – power factor: 0.88-0.82
• Rated speed: 2910-2920 rpm
• Efficiency: IE3 90,1%
• Motor efficiency at full load: 90.1-90.4 %
• Motor efficiency at 3/4 load: 90.8 %
• Motor efficiency at 1/2 load: 90.8 %
• Number of poles: 2
• Enclosure class (IEC 34-5): 55 Dust/Jetting
• Insulation class (IEC 85): F

Materials:

• Base: Cast iron
• Impeller: Stainless steel
• Bearing: SIC

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