Grundfos CRFlex Solar Surface Pump

Model: CRF 1-9 - 1 HP

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$3,648.32
SKU: 98419320
Weight : 69.0 lb
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Description
GRUNDFOS · SOLAR SURFACE PUMP
CRFlex
Vertical multistage CR pump on the MGFlex permanent-magnet motor with integrated frequency converter and MPPT. Nine models, CRF 1-9 to CRF 15-1, in 880 W and 1730 W motor sizes. Runs directly from solar panels at 30-300 VDC, or from a generator or the grid at 1 x 90-240 VAC.
CRF 5-6: 40 GPM at 115 ft
CRF 1-17: 10 GPM at 394 ft
CRF 15-1: 141 GPM at 20 ft
30-300 VDC or 90-240 VAC
880 W or 1730 W MGFlex Motor
Built-In MPPT
Overview

The Grundfos solar surface pump system is designed for renewable energy supply. Powered by a solar panel, the system is especially suitable for supplying water in applications such as irrigation, watering of livestock, pressure boosting, floating pump installations and recirculation of swimming-pool water (OEM).

The CRFlex pump is available as a complete unit only, consisting of the MGFlex motor and a CR pump end. The MGFlex motor is a permanent magnet motor with integrated frequency converter, which enables the motor to run at high efficiency in a wide speed range: power input (P1) of 40 to 880 W and 60 to 1730 W, motor speed of 1000 to 3600 rpm, maximum input current of 4.6 A and 8.9 A, enclosure class TEFC / NEMA 3 (IP55).

The motor is suitable for both DC and AC voltage supply: 30-300 VDC, PE, or 1 x 90-240 VAC, -10 % / +6 %, 50/60 Hz, PE. As the integrated electronic unit handles both DC and AC supply voltages, it makes no difference how the wires + and - or N and L are connected. Thanks to the intelligent MGFlex motor, no further motor protection is required.

Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Performance — Will It Do What You Need?

Find your model, then the row for the head the pump has to add — lift plus elevation plus friction, shown in feet with the psi equivalent. Read across to the input power P1 your array delivers to the motor. The figure is gallons per minute at that duty point. The first column is the power at which the pump begins to deliver at that head; the last column is where Grundfos ends the published curve.

880 W MGFlex motor — 1 HP models

Model Head added Starts pumping - W 100 W 200 W 300 W 400 W 500 W 600 W 700 W 800 W 900 W End of curve - GPM
CRF 1-9 16 ft (7 psi) 40 6.4 9.7 11.7 13.2 14.5 15.6 16.6 17.4 - 17.7 at 830 W
33 ft (14 psi) 50 5 8.6 10.9 12.4 13.7 14.8 15.9 16.8 - 17.2 at 850 W
66 ft (29 psi) 80 1.7 6.3 8.8 10.7 12.2 13.4 14.5 15.5 - 16.2 at 880 W
98 ft (42 psi) 120 - 3.8 6.7 8.9 10.5 11.8 13 14.1 15 15 at 900 W
131 ft (57 psi) 160 - 1.4 4.5 6.9 8.8 10.2 11.4 12.5 13.6 13.9 at 920 W
164 ft (71 psi) 220 - - 2.5 4.9 6.9 8.6 10 11.1 12.2 12.5 at 930 W
197 ft (85 psi) 280 - - 0.7 3 5 6.8 8.3 9.6 10.7 11 at 920 W
230 ft (100 psi) 340 - - - 1.4 3.3 5 6.5 7.9 - 8.9 at 870 W
263 ft (114 psi) 420 - - - - 1.7 3.5 - - - 4.8 at 690 W
CRF 3-5 16 ft (7 psi) 50 8.9 15.5 19.4 22.1 24.6 26.7 28.5 - - 29.7 at 780 W
33 ft (14 psi) 70 4.9 12.7 17.1 20.1 22.5 24.7 26.6 - - 28.2 at 790 W
49 ft (21 psi) 90 1.6 9.5 14.1 17.7 20.5 22.7 24.7 26.3 - 26.5 at 810 W
66 ft (29 psi) 110 - 6.2 11.3 15.1 18.1 20.5 22.7 24.6 - 24.8 at 800 W
82 ft (36 psi) 150 - 3.1 8 12 15.3 17.9 20.2 22.2 - 22.8 at 820 W
98 ft (42 psi) 170 - 1.6 6.1 9.8 13.1 15.8 18.2 20.2 - 20.7 at 820 W
115 ft (50 psi) 210 - - 3.7 7.4 10.6 13.5 16 - - 18.1 at 790 W
131 ft (57 psi) 250 - - 2.1 5.5 8.5 11.3 13.9 - - 14.8 at 730 W
148 ft (64 psi) 290 - - 0.4 3.8 6.6 9.3 - - - 9.5 at 600 W
CRF 5-2 7 ft (3 psi) 40 20.5 31 37 42 46 49.5 - - - 50.5 at 630 W
13 ft (6 psi) 50 15 27 34 39 43.5 47 - - - 48 at 630 W
20 ft (9 psi) 60 9.5 22.5 30.5 36 40.5 44 - - - 45 at 620 W
26 ft (11 psi) 80 5 18 26.5 32.5 37.5 41.5 - - - 42 at 610 W
33 ft (14 psi) 90 1.5 13.5 22.5 29.5 34.5 38.5 - - - 39 at 600 W
39 ft (17 psi) 110 - 10 19 26 31.5 - - - - 35.5 at 580 W
46 ft (20 psi) 140 - 6.5 15 22.5 28 - - - - 31 at 560 W
53 ft (23 psi) 170 - 3 12 19.5 24.5 - - - - 26 at 530 W
59 ft (26 psi) 180 - 1.5 9.5 16 - - - - - 18.5 at 440 W
CRF 10-1 13 ft (6 psi) 70 11 37 51 61 69 75 81 - - 82 at 720 W
20 ft (9 psi) 100 1 25 41 52 61 69 75 - - 76 at 720 W
26 ft (11 psi) 120 - 15 30 42 53 61 68 - - 69 at 710 W
33 ft (14 psi) 160 - 8 23 34 42 50 58 - - 61 at 730 W
39 ft (17 psi) 210 - - 13 24 34 43 50 - - 50 at 700 W
46 ft (20 psi) 250 - - 7 19 28 35 - - - 38 at 640 W

1730 W MGFlex motor — 2 HP models

Model Head added Starts pumping - W 200 W 400 W 600 W 800 W 1000 W 1200 W 1400 W 1600 W 1800 W End of curve - GPM
CRF 1-17 66 ft (29 psi) 90 5.1 8.8 11 12.6 14 15.2 16.3 - - 17.1 at 1580 W
131 ft (57 psi) 170 1.4 6.3 8.9 10.9 12.3 13.6 14.8 15.7 - 16 at 1650 W
197 ft (85 psi) 250 - 3.5 6.7 8.9 10.6 12 13.3 14.3 - 14.8 at 1700 W
263 ft (114 psi) 360 - 0.9 4.3 6.8 8.8 10.3 11.6 12.8 - 13.5 at 1730 W
328 ft (142 psi) 460 - - 2.1 4.7 6.8 8.5 10 11.2 - 12 at 1740 W
394 ft (171 psi) 610 - - - 2.6 4.8 6.7 8.2 9.5 - 10.2 at 1710 W
459 ft (199 psi) 740 - - - 0.7 2.8 4.7 6.3 - - 7.5 at 1570 W
492 ft (213 psi) 810 - - - - 2.1 3.9 - - - 4.9 at 1330 W
CRF 3-11 16 ft (7 psi) 40 12.5 18.1 21.4 23.9 26 28 29.6 - - 30.5 at 1530 W
33 ft (14 psi) 50 10.7 16.5 20.1 22.6 24.9 26.9 28.6 - - 29.8 at 1580 W
66 ft (29 psi) 100 6.4 13.3 17.4 20.4 22.8 24.9 26.8 - - 28.4 at 1590 W
98 ft (42 psi) 140 3 10.3 14.8 18.1 20.7 22.9 24.8 26.5 - 27 at 1660 W
131 ft (57 psi) 180 0.7 7.2 12 15.6 18.5 20.8 22.8 24.6 - 25.5 at 1690 W
164 ft (71 psi) 240 - 4.6 9.3 13.1 16.2 18.7 20.8 22.6 - 23.8 at 1730 W
197 ft (85 psi) 300 - 2.5 6.9 10.6 13.8 16.5 18.9 20.8 - 21.9 at 1720 W
230 ft (100 psi) 370 - 0.7 4.7 8.3 11.5 14.4 16.8 - - 18.5 at 1580 W
263 ft (114 psi) 450 - - 3 6.4 9.4 12.1 14.6 16.9 - 17.2 at 1620 W
295 ft (128 psi) 520 - - 1.5 4.5 7.4 10.1 12.6 - - 13.9 at 1500 W
328 ft (142 psi) 600 - - - 3.1 5.6 - - - - 7.9 at 1160 W
CRF 5-6 16 ft (7 psi) 50 21 31 37.5 42 46.5 50 53 56 - 57 at 1700 W
33 ft (14 psi) 80 15 26.5 33.5 39 43 47 50 53 - 55 at 1740 W
49 ft (21 psi) 110 8.5 21.5 29 35 39.5 43.5 47 50 - 52.5 at 1760 W
66 ft (29 psi) 150 3.5 16.5 25 31 36 40 44 47 - 49.5 at 1770 W
82 ft (36 psi) 180 1 12 20.5 27.5 32.5 37 40.5 44 - 46.5 at 1780 W
98 ft (42 psi) 240 - 8 16.5 23.5 29 33.5 37.5 41 - 43.5 at 1790 W
115 ft (50 psi) 280 - 5 12.5 19.5 25 30 34 37.5 - 40 at 1750 W
131 ft (57 psi) 340 - 2.5 9.5 16 21.5 26.5 31 34.5 - 36 at 1690 W
148 ft (64 psi) 400 - - 6.5 12.5 18 23.5 28 31.5 - 32 at 1630 W
164 ft (71 psi) 450 - - 4 9.5 15 20 24.5 - - 26.5 at 1500 W
181 ft (78 psi) 510 - - 2 7 12 17 - - - 18.5 at 1270 W
CRF 10-2 16 ft (7 psi) 80 27 49 61 71 79 86 - - - 89 at 1360 W
33 ft (14 psi) 150 8 33 48 59 68 75 82 - - 83 at 1430 W
49 ft (21 psi) 220 - 17 34 46 57 65 72 - - 74 at 1460 W
66 ft (29 psi) 320 - 6 21 33 44 54 62 - - 64 at 1470 W
82 ft (36 psi) 400 - - 12 23 33 42 51 - - 52 at 1420 W
CRF 15-1 20 ft (9 psi) 130 17 57 78 94 106 118 128 136 - 141 at 1750 W
26 ft (11 psi) 180 6 42 66 83 97 108 119 127 - 129 at 1660 W
33 ft (14 psi) 230 - 30 54 72 87 99 109 119 - 120 at 1620 W
39 ft (17 psi) 290 - 16 41 60 76 89 100 110 - 113 at 1640 W
46 ft (20 psi) 360 - 6 29 49 65 79 90 - - 99 at 1580 W
53 ft (23 psi) 410 - - 20 39 55 69 81 - - 86 at 1490 W
59 ft (26 psi) 490 - - 12 30 46 59 - - - 65 at 1280 W

Figures are read from the vector curve data in the Grundfos solar surface pump data booklet 98619370, 60 Hz, 01/2020, figures 22 to 30, at round power values, with flow rounded down; the starts-pumping figure is rounded up to the next 10 W. A dash means the published curve does not cover that combination. The curves plot what the pump adds — total head — never a discharge pressure or a setpoint; psi is the equivalent of the head in feet. Input power P1 is the electrical power reaching the motor, which is lower than the nameplate rating of the solar array except in full sun. Grundfos curve conditions: all curves show mean values and must not be used as guarantee curves; typical deviation ±15 %; measured with water at 68 °F and a kinematic viscosity of 1 cSt; the QH curves include inlet and valve losses at actual speed. On CRF 1-17 Grundfos labels the 394 ft curve in metres (120 m). A thicker liquid reduces head and raises power consumption.

Models, Voltage & Phase
Model HP Max input P1 Max current Supply Suction and discharge Part No.
CRF 1-9 1 880 W 4.6 A 30-300 VDC or 1 x 90-240 VAC 1 in NPT (F) 98419320
CRF 3-5 1 880 W 4.6 A 30-300 VDC or 1 x 90-240 VAC 1 in NPT (F) 98419327
CRF 5-2 1 880 W 4.6 A 30-300 VDC or 1 x 90-240 VAC 1-1/4 in NPT (F) 98419329
CRF 10-1 1 880 W 4.6 A 30-300 VDC or 1 x 90-240 VAC 2 in NPT 98419330
CRF 1-17 2 1730 W 8.9 A 30-300 VDC or 1 x 90-240 VAC 1 in NPT (F) 98424448
CRF 3-11 2 1730 W 8.9 A 30-300 VDC or 1 x 90-240 VAC 1 in NPT (F) 98424474
CRF 5-6 2 1730 W 8.9 A 30-300 VDC or 1 x 90-240 VAC 1-1/4 in NPT (F) 98424476
CRF 10-2 2 1730 W 8.9 A 30-300 VDC or 1 x 90-240 VAC 2 in NPT 98424480
CRF 15-1 2 1730 W 8.9 A 30-300 VDC or 1 x 90-240 VAC 2 in NPT 98424484

Every model takes either supply on the same terminals — solar DC or single-phase AC — and the motor finds the maximum power point itself on DC. In the type designation CRF 3-11, 3 is the CR pump size and 11 is the number of stages. Supplied as a complete pump with a 6.56 ft cable. Part numbers are as listed on the Grundfos 2026 renewables price list.

Key Features
  • Maximum Power Point Tracking (MPPT) — the motor continuously optimizes the speed according to the input power available when connected to DC supply.
  • Wide voltage range — operates at any voltage from 30 to 300 VDC or 90 to 240 VAC.
  • Overvoltage and undervoltage protection — the motor stops if the voltage falls outside the permissible range and restarts when the voltage is back within it. No additional protection relay is required.
  • Overload protection — thermal protection against both steady overload and stalled condition to IEC 60034-11; the motor is stopped and restarted automatically.
  • Level switch straight to the motor — connected directly to the electronics box on the MGFlex motor, a level switch stops the pump when the water reservoir is full.
  • Advanced functional module FM 300 — three analog inputs, one analog output, two dedicated digital inputs, two configurable digital inputs or open-collector outputs, Grundfos Digital Sensor input and output, two Pt100/1000 inputs, LiqTec sensor inputs, two signal relay outputs and a GENIbus connection.
  • Solar, generator or grid — with the IO 101 switch box a backup generator takes over when it is started and the system returns to solar automatically when the generator stops or runs out of fuel.
  • Simple system — easy installation, few and simple components, maintenance confined to periodic cleaning of the solar panels.
Specifications
Specification Value
Power supply to pump 30-300 VDC, PE, or 1 x 90-240 V, -10 % / +6 %, 50/60 Hz, PE
Energy source Solar module, generator or grid
Motor MGFlex permanent magnet motor with integrated frequency converter — MGFlex 80A, 880 W (98367492) or MGFlex 90Sc, 1730 W (98190192)
Motor speed 1000 to 3600 rpm
Start / stop control Digital input for start / stop of motor
Power switch on / off, or DC to / from AC Maximum four times per hour
Enclosure class TEFC / NEMA 3 (IP55)
Motor protection Built in: overvoltage and undervoltage, overload, overtemperature
Power factor 0.97
Sound pressure level Below 42 dB(A) for the 1.00 HP motor
Insulation class F (IEC 85)
Ambient temperature Operation -4 °F to 122 °F. Storage and transport -13 °F to 158 °F
Relative humidity Maximum 95 %
Leakage current Below 3.5 mA for AC, below 10 mA for DC
Earth-leakage circuit breaker Where an ELCB is used as additional protection it must trip when AC fault currents, pulsating DC or smooth DC fault currents occur
Outdoor installation The motor and pump must be protected from rain and direct sunlight
Pumped liquids Thin, clean, non-aggressive, non-explosive liquids without solid or long-fibered particles larger than sand grains. pH 5 to 9
Liquid temperature 32 °F to 248 °F
Sand content Maximum 20 ppm. A higher sand content reduces pump life considerably due to wear
Suction lift The vertical distance between the pump inlet and the dynamic water level must be less than 19.68 ft. Grundfos system layouts include a non-return foot valve on the suction line
EMC EN 61800-3
Marking CE

Pump Energy Index. PEI is the DOE metric for pump efficiency — the lower the value, the more efficient the pump at the tested operating points; the DOE maximum is 1.00. PEIVL (variable load) applies to pumps sold with a motor and controller.

Model HP Phase Voltage Poles PEI VL Impeller diameter
CRF 10-1 1 1 90-240 V 2 0.42 3.66 in (92.9 mm)
CRF 10-2 2 1 90-240 V 2 0.41 3.66 in (92.9 mm)
CRF 15-1 2 1 90-240 V 2 0.45 4.13 in (105 mm)

PEI is a generalized efficiency value and cannot be used to determine the efficiency of a pump in a specific application.

Dimensions & Weights
Model B1 — pump B2 — motor B1 + B2 — overall height Net weight Gross weight
CRF 1-9 16.22 in 8.45 in 24.67 in 58 lb 69 lb
CRF 3-5 13.39 in 8.45 in 21.84 in 54 lb 65 lb
CRF 5-2 11.97 in 8.45 in 20.42 in 52 lb 63 lb
CRF 10-1 15.28 in 8.45 in 23.73 in 91 lb 109 lb
CRF 1-17 21.89 in 9.25 in 31.14 in 71 lb 85 lb
CRF 3-11 17.64 in 9.25 in 26.89 in 65 lb 80 lb
CRF 5-6 16.22 in 9.25 in 25.47 in 63 lb 78 lb
CRF 10-2 15.28 in 9.25 in 24.53 in 99 lb 113 lb
CRF 15-1 16.46 in 9.25 in 25.71 in 99 lb 113 lb

Motor dimensions D1 and D2 are 4.8 in and 6.22 in on every model. Base plates take four 1/2 in bolts on CRF 1, 3 and 5 and four 9/16 in bolts on CRF 10 and 15; the dimensional sketches with base and bolt-hole dimensions are in the Grundfos data booklet. Each pump has a G 1/2 priming port, G 1/2 drain plug, and a G 1/2 plug with 1/4 in tap for a gauge or sensor.

Materials
Component Material AISI / ASTM
Pump head Cast iron A 48-30 B
Shaft Stainless steel AISI 316 on CRF 1, 3 and 5 · AISI 431 on CRF 10 and 15
Impeller Stainless steel AISI 304
Chamber Stainless steel AISI 304
Outer sleeve Stainless steel AISI 304
O-ring for outer sleeve EPDM or FKM –
Base Cast iron A 48-30 B
Neck ring PTFE –
Shaft seal Cartridge type –
Bearing rings Silicon carbide –
Rubber parts EPDM or FKM –
FJG flange Cast iron A 48-30 B
System Configurations
System Components What it does
CRFlex Solar Pump, solar panels and support structure, IO 50 switch box, foot valve, optional dry-running switch The simplest system using solar energy for water transfer. The IO 50 switches the supply off by hand when no water is needed or for service
CRFlex Solar with level switch As above plus water reservoir and level switch Stores solar energy as water in a reservoir — for water at night, for short periods of insufficient solar energy, or as a backup source. The level switch stops the pump when the reservoir is full
CRFlex Solar with generator Pump, solar panels, IO 101 switch box, diesel or petrol generator Water during the night or in periods of insufficient solar energy. The IO 101 switches to generator operation when the generator is started and back to solar when it stops or runs out of fuel
CRFlex Solar with level switch and generator All of the above Reservoir storage with generator backup
CRFlex and SQFlex Solar SQFlex submersible with CU 200 control unit and level switch, reservoir, CRFlex with IO 50 The SQFlex pumps water from wells as small as 3 in into a reservoir; the CRFlex transfers water over a long distance or increases the water pressure

To calculate the number of solar panels required use the Grundfos sizing tools. The generator must be running steadily before the pump is cut in.

Switch boxes. The IO 50 enables manual starting and stopping of the pump in a solar-powered system and works as a connection box joining all necessary cables: maximum 300 VDC or 265 VAC, 8.9 A, IP55, 6 in x 4 in housing. The IO 101 adds connection of a backup generator: internal relay 230 VAC -15 % / +10 %, 50/60 Hz, maximum 225 VDC or 265 VAC, 8.9 A, IP55, 10.35 in x 7.83 in x 4.45 in. Both operate from -22 °F to 122 °F and are CE marked.

Suction Lift & Minimum Inlet Pressure

To avoid cavitation, make sure there is a minimum pressure on the suction side of the pump. Grundfos recommends calculating it when the liquid temperature is high, the flow is significantly higher than the rated flow, water is drawn from depths or through long pipes, or inlet conditions are poor. The maximum suction lift H in feet is:

H = pb - NPSHR - Hf - Hv - Hs

  • pb — barometric pressure in feet absolute; 33.9 ft at sea level. In closed systems it is the system pressure in feet
  • NPSHR — net positive suction head required in feet, read from the NPSHR curve at the highest flow the pump will be delivering
  • Hf — friction loss in the suction pipe in feet at that flow
  • Hv — vapor pressure in feet, which depends on the liquid temperature
  • Hs — safety margin, minimum 2.0 ft

If the calculated H is positive, the pump can operate at a suction lift of maximum H feet. If it is negative, an inlet pressure of minimum H feet is required. Never select a pump with a duty point too far to the right on the NPSH curve, and always check the NPSH value at the highest possible flow rate. The NPSHR curves for CR 1, 3, 5, 10 and 15 are in the appendix of the Grundfos data booklet.

Control Connections — FM 300
Terminal Type Function
NC, C1, NO Signal relay 1 Normally closed, common, normally open — LIVE (mains voltages up to 250 VAC) or SELV
NC, C2, NO Signal relay 2 Normally closed, common, normally open — SELV only
2 DI1 Digital input, configurable. Factory-set as start / stop; open circuit results in stop
1 DI2 Digital input, configurable
10 DI3/OC1 Digital input / output, configurable. Open collector maximum 24 V resistive or inductive
11 DI4/OC2 Digital input / output, configurable. Open collector maximum 24 V resistive or inductive
4 AI1 Analog input: 0-20 mA / 4-20 mA, 0.5-3.5 V / 0-5 V / 0-10 V
7 AI2 Analog input: 0-20 mA / 4-20 mA, 0.5-3.5 V / 0-5 V / 0-10 V
14 AI3 Analog input: 0-20 mA / 4-20 mA, 0-10 V
12 AO Analog output: 0-20 mA / 4-20 mA, 0-10 V
17, 19 Pt100/1000 input 1 and 2 Pt100/1000 sensor inputs
21, 22 LiqTec sensor input 1 and 2 LiqTec sensor input — white and blue conductors; terminal 20 is ground for the brown and black conductors
24, 25 GDS RX, GDS TX Grundfos Digital Sensor input and output
A, Y, B GENIbus GENIbus A (+), GND, B (-)
5, 26 +5 V Supply to potentiometer and sensor
8, 15 +24 V Supply
3, 6, 9, 18, 20, 23 GND Ground

A jumper is factory-fitted between terminals 2 and 6. Remove it if digital input 1 is to be used as external start / stop or for any other external function — for example a level switch or dry-running switch. All inputs and outputs are separated from the mains-conducting parts by reinforced insulation and supplied by safety extra-low voltage. Wires to the different connection groups must be separated from each other by reinforced insulation in their entire lengths.

Accessories
Accessory Grundfos product number
IO 50 switch box (US) 96959028
IO 101 switch box, 230 V 96475074
IO 101 switch box, 115 V 96481502
Dry-running switch 97911215
Level switch, normally closed 97911220
Level switch, normally open 010748

Accessory numbers as published in the Grundfos solar surface pump data booklet 98619370, 60 Hz, 01/2020. Email us for availability with your pump.

Applications
  • Irrigation
  • Watering of livestock
  • Pressure boosting
  • Floating pump installations
  • Recirculation of swimming-pool water (OEM)
  • Water transfer over a long distance from a reservoir filled by an SQFlex submersible
Before You OrderCRFlex is a surface pump and needs a flooded or short suction: keep the pump inlet less than 19.68 ft above the dynamic water level, fit a foot valve, and prime the pump before starting. Protect the pump and motor from rain and direct sunlight. Grundfos guarantees the performance and reliability of the MGFlex motor only when it is connected to the pump end as described in its documentation and assembled by Grundfos-trained persons — the CRFlex is supplied as a complete factory unit for that reason. Size the array to the input power in the table above, not to the panel nameplate. The part number is the complete pump with its cable only: solar modules, racking, switch box, foot valve, level and dry-running switches and pipework are separate items. A solar array is live whenever there is daylight, so isolate every DC and AC source before working on the pump. CRF 10-2 and CRF 15-1 ship by truck. Supplied for installation in the United States and shipped to U.S. addresses only.
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
Grundfos Solar Surface Pump Data Booklet — CRFlex, 60 Hz (98619370, 01/2020)CRFlex Product Guide — Earlier Generation (L-CR-PG-005, 05/2011)Grundfos GO Solar Sizing App Flyer (DN000994, 02/2021)Grundfos Solar Pumping Article (DN000858, 01/2020)
Videos

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