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SKU: 99752211
Grundfos Hydro Multi-E 3 x CRNE 5-4 Three Phase 3 x 0.75kW Variable Speed 304ss Booster Pump Set with 24L Tank
Australia-Wide
(08) 9240 2992
Official Grundfos
Peace of Mind
Product Overview
Regional airport terminal buildings managing passenger restroom banks select the Hydro Multi-E 3 CRNE 5-4. Three Grundfos CRNE 5-4 multistage pumps share the hydraulic load across a common skid, staging smoothly to match real-time draw. Ordering part number 99752211 puts the fully tested booster skid directly onto the plant room floor.
Manifold discharge supports flow requirements up to 510 L/min seamlessly. Up to 41 metres of delivery head is available to keep upper-floor fixtures pressurised. There is no separate central controller to purchase: Multi-Master control resides within the pumps, either unit can assume the controlling role, and a fault is handed over cleanly without interrupting supply.
Arriving skid-mounted for clean installation, the system features stainless steel pipework, two Rp 2 inch threaded manifold connections, isolation and non-return valves, pressure sensors, plus a 24L diaphragm tank. It connects to a 3 x 380-415 V supply at 50 / 60 Hz with combined rated current of 5.55 A (3 x 1.85 A per pump). Motors carry IP55 sealing with maximum pressure of 10 bar. Liquid-temperature suitability is 5°C to 60°C, and inlet pressure is rated to 10 bar.
Applications routinely include demanding sites like hospital surgical wings, aged-care complexes and industrial process supply, where continuous water is vital. Variable-speed motor modulation makes the set a practical clean-water pressure-boosting solution for both new plant rooms and system upgrades.
FEATURES
- Power use precisely tracks demand, avoiding the waste of fixed-speed alternates.
- An integrated 24L diaphragm tank carries small draw-offs and limits pump cycling.
- Each main pump is rated 0.75 kW (P2), so per-pump draw scales down as speed follows demand.
- Pump staging follows demand automatically: pumps enter at low speed as pressure drops, ramp to equal speed, and exit as flow fades.
- Multi-Master redundancy means either pump can act as controller, with seamless changeover on fault.
- The system pairs three CRNE 5-4 pumps in parallel duty, controlled as a single coordinated system.
- Maximum operating pressure of 10 bar with motors sealed to IP55.
- Each pump is driven by IE5 permanent magnet motors with frequency-controlled speed matching demand.
- Integrated Grundfos GO compatibility supports configuration, logging and diagnostics from a smartphone.
- Both constant-pressure and proportional-pressure modes are available, so plant rooms can tune response to pipework.
- Factory assembled and wet-tested, the set arrives pre-configured for straightforward installation.
- Stainless steel manifolds provide two Rp 2 inch threaded manifold connections ready for plant pipework.
- The system protects its pumps against dry running if the incoming supply is lost.
What's Included
- 3 x Grundfos CRNE 5-4 vertical multistage pumps
- IE5 permanent magnet motors with integrated frequency converters
- Stainless steel suction manifold
- Stainless steel discharge manifold
- Non-return valves
- Isolation valves
- Pressure sensors/transmitters
- Pressure gauge
- 24L diaphragm pressure tank
- Factory assembled and tested booster system
SPECIFICATIONS
| Max Flow | 510 L/Min |
| Max Head | 41 m |
| Power | 3 x 0.75 kW / 415v |
| Rated Current | 3 x 1.85 Amps |
| Suitable For | Commercial Water Supply, Process and Food-Grade Duties |
| Body Material | Stainless Steel |
| Liquid Temperature | 5°C to 60°C |
| Inlet Size | 50 mm |
| Outlet Size | 50 mm |
| Warranty | 24 Months |
Warranty & Returns
All products supplied by Foundation Pumps are covered by a minimum 12-month warranty unless otherwise stated. Some brands may offer longer manufacturer warranties. Warranty covers manufacturing defects, faulty materials and workmanship under normal use.
- Products must be installed correctly and in accordance with the manufacturer’s instructions.
- Warranty does not cover incorrect installation, misuse, dry running, normal wear and tear, unauthorised repairs or damage caused by external factors.
- Proof of purchase, photos, videos and installation details may be requested when assessing a warranty claim.
- The customer is responsible for returning the product to Foundation Pumps or the nominated service centre unless otherwise agreed.
- Removal, reinstallation, labour and associated site costs are generally the customer’s responsibility unless required under Australian Consumer Law.
- Change-of-mind returns may be accepted within 30 days provided the product is unused, uninstalled and returned in its original packaging.
- Customers are responsible for return freight costs for change-of-mind returns.
- Restocking fees may apply to special-order, bulky or non-stocked products.
- Used, installed or specially ordered products may not be eligible for change-of-mind returns.
- If a product arrives damaged or faulty, please contact Foundation Pumps as soon as possible so we can assist with the appropriate repair, replacement or refund.
Your rights under Australian Consumer Law are not affected.
How much water flow can this multistage pump package discharge when all pumps are operational?
Under maximum plant draw, the Grundfos Hydro Multi-E 3 CRNE 5-4 U2 A-A-I-I-DU (part number 99752211) supplies up to 510 L/min of clean water through parallel multistage stages.
How is motor power and variable frequency regulation configured across this booster assembly?
Electrical propulsion across the Hydro Multi-E 3 CRNE 5-4 utilizes three 0.75 kW IE5 permanent-magnet MGE electric motors wired for 3 x 380-415 V supply.
Which vertical elevation head does this parallel multistage pump package achieve under full duty?
Under peak line requirements, the Hydro-Multi-E-3-CRNE-5-4 delivers a maximum vertical head of 41 m and accommodates system pressures up to 10 bar.
Which inlet and outlet connection dimensions are provided on the stainless steel manifolds?
Pre-assembled manifold pipework on the Hydro Multi E 3 CRNE 5 4 includes R 2 stainless steel suction and discharge headers with isolating valves and non-return valves.
How is this packaged multi-pump booster set supported under manufacturer warranty?
Complete skid backing for the 3 CRNE 5-4 (Hydro Multi-E) includes an authentic Grundfos two-year manufacturer warranty covering the motors, wet ends, and integrated controls.
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