Grundfos Circulator pump UPS 50-120/2 F 280

UPS is a three-speed circulator pump designed for heating and air-conditioning systems and is also used for central and district heating systems. The pump provides reliable and maintenance-free operation.

The pump is of the canned rotor type, i.e. pump
and motor form an integral unit without shaft
seal and with only two gaskets for sealing.
The bearings are lubricatd by the pumped liquid.
In order to avoid problems in connection with
disposal, great importance has been attached to
using as few different materials as possible.
The pump is characterized by:
* 3 speed motor.
* Ceramic radial bearings.
* Carbon axial bearing.
* Stainless steel rotor can, bearing plate
and rotor cladding.
* Aluminium alloy stator housing.
* Cast iron pump housing.
* Stator with built-in thermal switch.
The motor is a 3-phase motor.
The pump is supplied with a standard
module in the terminal box.
The standard module is to be connected to the
mains supply via external contactor.

Relay: N
Liquid:
Pumped liquid: Water
Liquid temperature range: -10 .. 120 °C
Selected liquid temperature: 60 °C
Density: 983.2 kg/m³
Technical:
Rated flow: 16.3 m³/h
Rated head: 7.55 m
Approvals: AAA,EAC
Materials:
Pump housing: Cast iron
EN 1561 EN-GJL-250
35 B – 40 B
Impeller: Stainless steel
EN 1.4301
AISI 304
Installation:
Range of ambient temperature: 0 .. 40 °C
Maximum operating pressure: 10 bar
Type of connection: DIN
Size of connection: DN 50
Pressure rating for connection: PN 6/10
Port-to-port length: 280 mm
Electrical data:
Power input in speed 1: 450 W
Power input in speed 2: 530 W
Max. power input: 720 W
Mains frequency: 50 Hz
Rated voltage: 3 x 400-415 V
Current in speed 1: 0.82 A

Current in speed 2: 0.94 A
Current in speed 3: 1.3 A
Cos phi in speed 1: 0.79
Cos phi in speed 2: 0.81
Cos phi: 0.8
Number of poles: 2
Insulation class (IEC 85): H
Enclosure class (IEC 60529): X4D
Built-in motor protection: CONTACT
Thermal protection: EXT.
Others:
Terminal box position: 1.30H
Net weight: 23.1 kg
Gross weight: 24.3 kg
Shipping volume: 0.034 m³
Danish VVS No.: 380725042
Norwegian NRF no.: 9042424