Danfoss MPE 70 User manual

Operating guide
Energy Recovery Device
MPE 70
Installation, Operation and
Maintenance Manual
hpp.danfoss.com

Operating guide | MPE 70
2180R9426 | AQ367027814446en-000801 | IOM MPE 70 | 08.2022
Table of Contents 1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Target group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Manufacturer and customer service address . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Country specic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5.1 United Kingdom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Additional technical documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Application range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Preferred system design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5 Initial start-up and settings of safety equipment . . . . . . . . . . . . . . . . . . . . 8
3.6 Over-pressurisation caused by low pressure isolation. . . . . . . . . . . . . . . . . . 8
4 Arrival inspection, handling and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Arrival inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Return to the supplier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Transport and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5 Technical data and design details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1 Design details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.2 Sound level of the MPE 70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.4 Temperature and corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
5.5 Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
5.6 Electrical motor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
5.7 How does the MPE 70 work?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6 Operation and Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
6.1 Initial start-up and ushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
6.2 Air bubbles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Start-up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4 Shut-down sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.5 High pressure remains after shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.6 CIP or membrane cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6.7 Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.8 Seawater quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.8.1 Pre-ltration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.8.2Chemicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

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7 On-site installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.1 Design details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.2 Assembly MPE 70 to electric motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.3 Danfoss Oers rail and Bracket solution . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.4 Orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
7.5 Piping and joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.6 Accessibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.7 Motor and frequency converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7.7.1 Electric motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7.7.2 Starting torque for the MPE 70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7.7.3 Frequency converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
8 Commissioning, start-up and shutdown . . . . . . . . . . . . . . . . . . . . . . . .19
8.1 Safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
8.2 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
8.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
9 Service/Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
9.1 Safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
9.2 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
9.3 Maintenance schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
9.4 Recommended service intervals for MPE 70 . . . . . . . . . . . . . . . . . . . . . . .21
9.5 Recommended service for electric motor . . . . . . . . . . . . . . . . . . . . . . . . .21
10 Trouble-shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
10.1 Safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
11 Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
11.1 Data sheet MPE 70 (AI358154451639en-000401)). . . . . . . . . . . . . . . . . . . . .25
11.2 Instruction (AN362429033229en-000201) . . . . . . . . . . . . . . . . . . . . . . . . .39
11.3 Design guide Pipe connections (180R9367) . . . . . . . . . . . . . . . . . . . . . . . .51
11.4 MPE 70 part list (AX361839752024en-000301). . . . . . . . . . . . . . . . . . . . . . .53
11.5 Operating- and maintenance instruction, electric motor (180R9230) . . . . . . . .59

Operating guide | MPE 70
4180R9426 | AQ367027814446en-000801 | IOM MPE 70 | 08.2022
Document information and copyright
Installation, Operation and Maintenance
Manual.
Danfoss can accept no responsibility for
possible errors in the manual and
instructions. 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 specications already agreed.
All rights reserved. Contents provided
herein must neither be distributed, copied,
reproduced, edited or processed for any
other purpose, nor otherwise translated or
published without Danfoss’express written
consent.
Validity
This manual is valid for MPE 70
Description Code no. Serial no.
MPE 70 without
motor 180F7070 XXXXXX01-XXX
MPE 70 (IEC motor) 180F7066 XXXXXX01-XXX
The serial number is referring to the Serial
no. on the product label. The digits shown
(01) indicate the version number of the
pump.
This document is only valid for MPE version
1 and upwards.
1. Validity
ERD
Type MPE 70
Code no. 180F7070
Serial no. XXXXXX01-XXX
MADE IN DENMARK
Danfoss A/S, 6430 Nordborg, Denmark

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2. Introduction 2.1 General
MPE 70 is manufactured by Danfoss A/S, and
is sold and marketed by a net of authorised
distributors world wide.
This manual contains the necessary instruc-
tions for the installation, operation and
service of the MPE 70.
All personnel who are responsible
for the operation and maintenance of the
MPE 70 unit must read and fully unders-
tand these instructions, especially the
section “Safety” before:
• Transporting of the MPE 70 unit.
• Lifting the unit.
• Installing the MPE 70 unit on a frame.
• Connecting the MPE 70 unit to the uid
system.
• Connecting the electrical motor and
instrumentation.
• Commissioning the unit.
• Servicing the MPE 70 unit, mechanics
and electrics.
• Decommissioning the MPE 70 unit.
Ensure that these instructions are
always readily available to all personnel
concerned.
2.2 Target group
This manual is intended for use by
personnel with qualied training and
experience in the operation and
maintenance of a Sea Water Reverse
Osmosis (SWRO) or Brackish Water Reverse
Osmosis (BWRO) system.
2.3 Symbols
Indicates something to be noted by
the reader.
Indicates a situation which will or
could result in damage to the MPE 70
and its function.
Indicates a situation which will or
could result in personal injury and/or
damage to the MPE 70.
Electrical hazard. Indicates a
high-voltage warning
Safety glasses required
Hearing protection required
Safety shoes required
Safety helmet required
2.4 Manufacturer and customer service
Danfoss A/S
High Pressure Pumps
DK-6430 Nordborg, Denmark
Telephone: [phone]
Email: [e-mail]
Homepage: hpp.danfoss.com
2.5 Country specic information
2.5.1 United Kingdom
UK importer:
Danfoss Ltd.
22 Wycombe End
HP9 1NB Beaconseld
United Kingdom

Operating guide | MPE 70
6180R9426 | AQ367027814446en-000801 | IOM MPE 70 | 08.2022
2.6 Additional technical documents
Below documents are not present in this Operating guide. Please contact Danfoss.
Document name Content
Service guide: “MPE 70 Disassembling and
assembling”
Description of how to disassemble and as-
semble the MPE 70
Guide line: “P and ID review sheet” Detailed description about the need for
each individual component in the preferred
P&ID
Quick guide for FC51 ; “MG02BC02” Description on how to setup Danfoss
frequency controler type FC 51

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3. Safety 3.1 General
The MPE 70 must not be used for other
purposes than those recommended and
specied without rst consulting your local
MPE 70 distributor.
This manual must be read and completely
understood by the responsible specialist
personnel prior to installation and commis-
sioning.
Use of this manual does not relieve opera-
tion and maintenance personnel of the
responsibility of applying normal good
judgment in the operation and care of this
product and its components.
This manual must be available to all person-
nel concerned at the site at all time.
An MPE 70 must always be installed and
used in accordance with existing national
and local sanitary and safety regulations
and laws. It is the responsibility of the safety
ocer or the chief operator to assure com-
pliance with all local regulations that are not
taken into account in this manual.
The MPE 70 is a rotating machine that typi-
cally operates at high pressure.
Always wear suitable safety and lifting
equipment when handling the MPE 70.
• Bolt the MPE 70 properly to the frame
before start-up to avoid personal
injury and/or damage to the MPE 70.
• The pipe connections to the MPE 70
must be stress-free mounted, securely
fastened to the MPE 70 and well
supported. Improper installation will
or could result in personal injury
and/or damage to the MPE 70.
• Proper installation and care of
shutdown devices and over-pressure
protection equipment is essential.
• All electrical installation work must be
carried out by authorised personnel in
accordance with EN60204-1 and/or
local regulations.
• Install a lockable circuit breaker to
avoid inadvertent starting. Protect the
motor and other electrical equipment
from overloads with suitable
equipment.
• The electric motors must be supplied
with adequate cooling ventilation.
• Improper installation can cause fatal
injuries.
• The MPE 70 must not operate outside
the application range.
• Make sure that the pressure is
released from the MPE 70 before the
MPE 70 is disconnected from any pipe
connections.
• Before intervening in the
MPE 70/system, the power must be
shut o and the starting device must
be locked. When intervening in the
MPE 70 unit, follow the instructions
for Service/Maintenance, chapter 8.
• A failure not to follow the instructions
can result in personal injury and/or
damage to the MPE 70. It will also
invalidate the warranty.
• The MPE 70 must never run dry. Dry
running produces heat and will cause
damage to internal parts.
• If the MPE 70 does not function
satisfactorily, contact your local MPE
70 distributor.
Use of this manual does not relieve
operation and maintenance personnel
of the responsibility of applying normal
good judgment in the operation and
care of this product.

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8180R9426 | AQ367027814446en-000801 | IOM MPE 70 | 08.2022
3.2 Intended use
The MPE 70 is designed for use as energy
recovery device in Sea Water Reverse
Osmosis (SWRO) or Brackish Water Reverse
Osmosis (BWRO) system.
The MPE 70 must not be used for other
purposes than recommended and quoted
for without consulting your local MPE 70
distributor.
3.3 Application range
For application range see data sheet
“MPE 70 Pressure exchanger” available in ap-
pendix 11.1.
Applications not suitable for the MPE
70 can cause damages to the
MPE 70 unit, with risk of personal
injury.
3.4 Preferred system design
Danfoss recommends building systems with
a high degree of safety. Our preferred
system design can be found in the data
sheet “MPE 70 Pressure exchanger” in ap-
pendix 11.1.
• It is always the system builders’ re-
sponsibility to ensure that the system
design does not cause any form of
hazard and are adapted to local regu-
lations.
• Proper installation and care of
shutdown devices and over-pressure
protection equipment is essential.
3.5 Initial start-up and settings of safety
equipment
To prevent such over-pressurisation,
appropriate relief valves should be
used or procedures should be
implemented to safeguard the HP
lines and instrumentations in the
RO system.
The system designer is responsible to
design the equipment according to the
local regulations where the equipment
is running. According to PED 2014/68/
EU a risk assessment must be made to
identify and evaluate hazards which
apply to his equipment on account of
pressure.
Where under reasonable foreseeable
conditions, the allowable limits could
be exceeded, the pressure equipment
must be tted with, or provision made
for tting of a suitable protective
device.
3.6 Over-pressurisation caused by low
pressure isolation
If both LP In and LP Out lines of the MPE70 is
blocked and the MPE 70 is exposed to
high-pressure, there is a risk that the LP
piping could be damaged by over-pressuri-
sation.
If positive displacement pumps are
used be aware they can build up
pressure exceeding the mechanical
strength of the membrane vessels,
pipes and other accessories. The pres-
sure rise can be fast and may exceed
the response time for electrical safety
equipment, like pressure switch and
control loop.
To prevent such over-pressurisation,
appropriate relief valves should be
installed in the LP side or procedures
should be implemented to assure that
the HP of the MPE 70 is depressurised
prior to the isolation of the LP side.

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4. Arrival inspection,
handling and storage
4.1 Arrival inspection
The MPE 70 is packed in a wooden box. The
MPE 70 ports connector are protected by
plastic caps that protect the MPE 70 against
dust and particles. Do not remove the caps
before the system have been ushed and
the MPE 70 can be installed.
Remove all packing materials immediately
after delivery. Immediately check the
shipment for damage on arrival and make
sure that the name plate/type designation is
in accordance with the packing slip and your
order.
In case of damage and/or missing parts, a
report should be drawn up and presented
to the carrier at once.
The identication label on the MPE 70 states
the specic type, the serial number and the
code number of the MPE 70; see g. below.
The last three digits of the Serial No. indicate
the week and year of production.
4.2 Return to the supplier
Flush the MPE 70 with clean water. Drain the
MPE 70 and plug the port connections with a
cap/cover.
Pack the MPE 70 into a suitable container
and make sure that it is suitably fastened to
the container.
4.3 Transport and Handling
• Personnel involved in lifting and
transportation of the equipment must be
trained in proper handling and safety
procedures.
• Observe the local regulations regarding
lifting.
• Use suitable, permitted lifting equipment.
• Be aware of individuals located in the
operation area while lifting the
component.
The weight of the MPE 70 including electric
motor can be found in the data sheet.
All parts weighing more than 20 kg (44 lb)
must be lifted using lifting slings and suit-
able lifting devices, e.g. an overhead crane
or fork lift.
Do not use connections/nozzles for lifting.
Do not use only one sling! Make sure that
the load is balanced before attempting the
lift.
ERD
Type MPE 70
Code no. 180F7070
Serial no. XXXXXX01-XXX
MADE IN DENMARK
Danfoss A/S, 6430 Nordborg, Denmark
Please coordinate the shipment with your
local authorized distributor or contact
Danfoss direct to obtain a return shipping
address.
When lifting the ERD use the lifting eyes.

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Incorrect lifting can result in personal
injury and/or damage of the unit.
4.4 Storage
Each MPE 70 is tested in demineralized
water before shipment. When tested the
MPE 70 is emptied and “plugged”, this will
prevent frost damages.
The storage temperature is is:
-40 °C to +70 °C (-40°F to 158 °F) –
provided that the MPE 70 is drained of uid
and stored “plugged”.
Frost protection is required if the MPE 70 is
not completely drained of uids at tempera-
tures below 1 °C
Storage of MPE 70 that have been in opera-
tion:
For shorter periods of storage ush the MPE
70 with permeate and store.
For long term storage (more than 2 months)
Danfoss recommends to clean any biologi-
cal growth of the surfaces. Store the Pres-
sure Exchanger dry without water inside.
Danfoss recommends using DOWFROST
from DOW Chemical Company
or Chillsafe mono propylene glycol from
Arco Chemical Company.
For further information on anti-freeze me-
dia, please contact Danfoss High Pressure
Pumps.
• The MPE 70 is delivered
frost-protected from the factory.
• Only remove caps from the openings
of the MPE 70 at the time of installa
tion.
4.5 Outdoor Storage
For outdoor storage cover the MPE 70
(set) with waterproof material.
When the MPE 70 is mounted with an
electric motor and lifted horizontal it must
be lifted in the lifting eye on the MPE 70.
Some motors have specic lifting eyes -
these should only be used for lifting the mo-
tor. For more information on lifting please
read the installation guide MPE 70 ERD
Installation instruction.
Do not use connections/nozzles for lift-
ing!
For more information see “MPE 70 Installa-
tion instructions” in appendix 11.2.
Lifting the MPE 70 with electric motor
(vertical):
Lift the MPE 70 unit with suitable lifting eyes
mounted in the ange as shown on the pic-
ture. Suitable lifting eys in part of the toolkit
180F4177.