MADE IN DENMARK Code no. 180FXXXX This document is only valid for ERD version 2 Serial no. XXXXXX02-XXX and upwards. Danfoss A/S, 6430 Nordborg, Denmark 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
If the recommendations in the manual are not followed, Danfoss reserves the right to void the warranty. 2.6 Additional technical documents Below documents are not present in this Operating guide. Please contact Danfoss. Document name Content Service guide: 180R9387 Description of how to disassemble and assem-...
• equipment. • The electric motors must be supplied with adequate cooling ventilation. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Please coordinate the shipment with your local authorized distributor or contact anfoss direct to obtain a return shipping address. When you have finished using the lifting eyes, remove them to prevent corrosion. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Measure the longest distance “A” from top of bell housing to the button of coupling claw. Mount the coupling on motor shaft. Ensure the coupling and motor flange are not in contact with each other. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Danfoss recommends servicing the product and clean any biological growth of the surfaces. Store the pump dry witout water For outdoor storage cover the iSave (set) with inside. waterproof material. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
RO plant and the iSave. See “Hose assembly and installation” - 180R9084 in chapter10.5 and Guide line Pipe connections 180R9367. Alternative use multiple flexible Victaulic® couplings on the hard piping. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Maintenance instructions, electric motor” in pump. The rotation speed of the pressure appendix 10.7 exchanger and the pump is exactly the same, as they are driven by the same electric motor. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
RO system is pressurised. Special like pressure switch and control loop. consideration should also be given to air bubbles in feed flow, continuously fed into the HP pump and iSave. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
It is important to assure that hese particles must not enter the iSave as the waste product of flushing exceed the iSave filtration. Also see instruction “Membrane cleaning of RO system with iSave unit” in appendix 10.3. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Make sure that the bolts are properly locked and will stay locked over time. A failure to comply with this will or may result in personal injury and/or damage the iSave. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
The space must be sufficient enough to allow for safe lifting of the equipment, with no risk for It is required to use a VFD. See Danfoss guide line personal injury and/or damage to the iSave. 180R9372 “APP pumps and iSave overload protection”.
Rated quotes are offered upon request. • At low pressure, start the iSave and check direction of rotation. • “Start and stop procedure” Guide line 180R9213. - appendix 10.2. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Clean the filter housing and reinstall Check power consumption. If there are filters. Make sure no debris enters the irregular parts of the iSave and replace if system. necessary. Lubricate motor bearings. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
For electric motor in horizontal mount; grease every 12 months. If the motor has increased vibrations or sound check the bearings. Follow manufacturer’s recommendations for electric motor service and maintenance, see appendix 10.7. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Repair or change valve (s) Internal leakage in iSave Repair iSave Pressure on the membranes (5) is too low Incorrect speed on the HP pump Check the HP pump and repair, if necessary 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet iSave® Energy Recovery Device iSave 50 / iSave 70 hpp.danfoss.com...
Page 24
50-70 with NEMA motor 30 HP on base frame vertical - back mounted ... . .41 iSave 50-70 with NEMA motor 30 HP on base frame horizontal ......42 Service.
Data sheet | iSave 50 and iSave 70 1. General information Energy Recovery Devices (ERD) are used in All parts included in the iSave 50 & 70 are reverse osmosis (RO) systems to recycle the designed to provide long service life with a...
Flow at min. speed, HP out m³/h Flow at max. speed. HP out l/min Max. lubrication flow at 60 barg (871 psig) m³/h Peak flow, LP in m³/h 57.2 Max. allowable working flow, LP in 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 27
Continuous operation: iSave can operate continuously with up to 10% over flush with the limitation that the flow rate at LP inlet shall not exceed 70 m 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
(motor pump unit) from min. to max. pressure and been commissioned and run in. speed. Area covered with recommended IE3 motor configurations (excl. of space to service the ERD) For higher temperature, contact Danfoss. Dependent on NaCI concentation. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
(motor pump unit) from min. to max. pressure and been commissioned and run in. speed. Area covered with recommended IE3 motor configurations (excl. of space to service the ERD) For higher temperature, contact Danfoss. Dependent on NaCI concentation. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
3 bar delta-P: 2 bar delta-P: 1 bar Motor speed [rpm] 5.5 Mixing curve Volumetric mixing versus flushing 14,0 12,0 10,0 Flush ratio (larger than 0 means overflush) [%] 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
The noise level is influenced by: level if the VFD does not have the right Speed: settings. • High rpm makes more fluid/structure-borne pulsations/vibrations than low rpm due to higher frequency. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Please the air is purged from the system before consult the Danfoss Hoses and Hose Fittings startup. data sheet (521B0909 ) and Right and wrong Hose assembly (180R9084) for guidance. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 35
(180R9370) or contact Danfoss. pressure relief valve or pressure safety valve as illustrated. In case the Danfoss check valves The iSave 50 and iSave 70 can be mounted in are not used, the valve must be placed parallel. For more information, please see between pump and check valve (See “Design Guide Parallel-coupled APP and iSave”...
Data sheet | iSave 50 and iSave 70 Dimensions and 8.1 iSave 50-70 connections without electric motor 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet | iSave 50 and iSave 70 8.2 iSave 50-70 with with IE3 motor 18.5 kW on base frame vertical_front mounted 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet | iSave 50 and iSave 70 8.3 iSave 50-70 with with IE3 motor 18.5 kW on base frame vertical_back mounted 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet | iSave 50 and iSave 70 8.4 iSave 50-70 with with IE3 motor 18.5 kW on base frame horizontal 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet | iSave 50 and iSave 70 8.4 iSave 50-70 with NEMA motor 30 HP on base frame vertical - front mounted 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet | iSave 50 and iSave 70 8.5 iSave 50-70 with NEMA motor 30 HP on base frame vertical - back mounted 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Data sheet | iSave 50 and iSave 70 8.5 iSave 50-70 with NEMA motor 30 HP on base frame horizontal 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Parallel coupled APP and iSave 180R9367 Pipe connections 180R9371 Pressure safety valve in the SWRO system 180R9372 APP and iSave overload protection 180R9370 Review sheet P&ID 521B1009 Filtration iSave selection tool (hpp.danfoss.com) 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 44
Denmark Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
Design guide iSave Energy Recovery Device Start and stop of the SWRO with iSave hpp.danfoss.com...
Page 46
Design guide Start and stop of the SWRO with iSave unit Table of Contents Prior to start-up................................47 Starting up the system..............................48 Daily system shutdown..............................48 More than one day system shut down........................49 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 47
APP pump(s). low-pressure side can be adjusted up to 10% higher than the high-pressure flow with the limitation that the flow rate at LP inlet may not exceed 70 m³/h. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 48
“LP-out” pressure (14) is higher than 1 barg/14.5 psig, increase flow and decrease pressure by opening the pressure control valve (15). 2. If the “LP-in” flow (12) is too low and the 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 49
HP out iSave Fresh water permeate flush HP in HP in Drain Second stage filter: If recommended housing design and cartridges are not used, a second stage filter is required 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Design guide Energy Recovery Device iSave Membrane cleaning of RO-system hpp.danfoss.com...
Page 52
Design guide | Membrane cleaning of the RO-system with iSave ERD Table of Contents Membrane cleaning ................................53 P&ID No.1 ....................................54 P&ID No. 2 ....................................55 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 53
Recycle the cleaning solution from the piping to the cleaning solution tank. 6. Turn of the pump and allow the elements to soak. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 54
The high flow rate compensate for the pressure drop from feed flushes out the foulants removed from the to concentrate. membrane surface by the cleaning. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 55
HP out iSave Fresh water permeate flush HP in HP in Drain Second stage filter: If recommended housing design and cartridges are not used, a second stage filter is required 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Design Guide APP pumps and iSave® overload protection ro-solutions.com hpp.danfoss.com...
Page 58
Allowable Operating Torque. See graph in example #2 in chapter 2.1. Danfoss strongly recommend to use the possibility to detect significant change in actual load. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Starting torque. Example #1 Load Protection VFD setting: According to maximum allowable operating torque Max starting torque 20% overload 20% overload 30 sec 30 sec Max allowable operating torque Torque Percent of design speed Example #2 Load Protection VFD setting: According to actual load Max starting torque Maximum allowable operating torque 20% overload 20% overload 30 sec 30 sec Maximum Operating torque Torque Percent of design speed 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Set to 30 sec. Current limit Parameter 4-18 “Current limit” Set in [%] (Par. 4-18 must always be larger or equal to Par. 4-16), (please contact Danfoss or see chapter 5.2 for iSave) 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Operational speed (Max.) Parameter 4-13 Delay torque limit 30 sec. 30 sec. 30 sec. 30 sec. Parameter 14-25 Maximum torque the electric motor is able to operate with iSave 21 old version 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Instruction Instruction Right and wrong Right and wrong Hose assembly routing tips Hose assembly routing tips danfoss.high-pressurepumps.com hpp.danfoss.com...
Page 68
Use proper angle adapters to avoid sharp twist bends. If possible, do not clamp high and or bend of hose. low pressure lines together. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 69
Tight bends can also compromise the hose reinforcement and cause premature hose failure. Refer to hose specification table on page 6 for minimum bend radii. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 70
Max. bending angle and distance S can be Hoses should not be twisted and should found in table 1 on page 6. only have one bend. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 71
HIGH HIGH PRESSURE PRESSURE To allow the hose to expand when pressurized, clamps should not be used at bends. If possible, do not clamp high and low pressure lines together. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 72
The installation instuction for Style 77DX is located in the Victaulic document I-100 Field Installation Handbook (htpp://static.victaulic.com) O.D. α When using flexible hoses, it is recommened to use Hose Whip Restraint. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 73
Instruction | Right and wrong - Hose assembly routing tips 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Electric Motors Motor Manual hoyermotors.com M a n u a l...
Page 88
Only mount or remove drive components (pulley, coupling, seals and replace if necessary. Both electrical and mechanical 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 89
At 60Hz the time will be reduced by app. 20%. Maintenance, repairs and replacement on this type must Data for vertically mounted motors are half of the above only be carried out by qualified specialists. values. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Page 92
T +86 574 26 28 15 77 · F + 86 574 2628 1573 sweden@hoyermotors.com korea@hoyermotors.com hoyermotors@hoyermotors.cn hoyermotors.com hoyermotors.com hoyermotors.cn Important notice. Text and data in this catalogue are not binding and we reserve the right to implement changes without further notice. 180R9357 | AQ265943679828en-001002 IOM iSave 50 - 70 | 03.2023...
Need help?
Do you have a question about the iSave 50 and is the answer not in the manual?
Questions and answers