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Operation guide
User manual
Installation, Operation and
PAHT G 20/25/32 and
PAHT G 50/63/70/80/90
PAHT / PAHT G 20-90 pumps
PAHT/PAHT G 20 to
PAHT/PAHT G 80
Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
Table of Contents Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Symbols
1.3
1.4
1.4.1
Manufacturer and customer service address: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Country specific information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
United Kingdom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.1
2.2
2.3
2.4
2.5
General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Preferred system design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Commissioning and servicing the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Adhere to the following important points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
In case of doubt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.
3.1
3.2
3.3
3.4
3.5
Noise and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Dimension drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.6 Space requirement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.7 Filtration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.8
3.9
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Approved applications and operational limits for the pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Application range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Electric motor data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Properties of water. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Air bubbles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.10 Chemicals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.
4.1
Arrival inspection, transportation, handling, lifting and storage . . . . . . . . . . . . . . . . . . . . . . . . . .8
Arrival inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.3
4.4
4.5
General safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Transport and handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Return to supplier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.6 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5.
5.1
5.2 Cleanliness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.3
5.4
5.5
5.6
5.7
5.8
Installation and commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Important dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Fluid temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Electrical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Local regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Pre mounting checklist, based on Danfoss preferred system designs . . . . . . . . . . . . . . . . . . . .11
Lifting and positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Mount the different equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.9 Electrics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.10 Instrumentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.11 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.12
5.13
Ensure free flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Verify setting of safety/relief valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Bleed and remove air from the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Verify direction of rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
5.14
5.15
5.16 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
5.16.1
5.16.2
5.17
5.18
Open system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Closed system (not applicable for PAHT G 256-308) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Check the filter condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Instruct operator and maintenance personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.
6.1
6.2
Operation of motor pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
General safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
What to listen and look for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
7.
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
Maintenance and service of the pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
General safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Service and inspection interval for the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Shut down of the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Disassembling and assembling the pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Assembling the pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Procedure for mounting the pump back onto electric motor . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Getting the pump unit back into operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Storage of the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
8.
8.1
8.2
8.3
Troubleshooting and scrapping criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
General safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Operational conditions which can cause pump failures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Mechanical failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
8.4 Electrical failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
8.5 Responsibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
8.6 Scrapping criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5.
6.
3.
4.
1.
2.
Appendices
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Data sheet PAHT G 2-308 / ATEX PAHT G pumps (AI106586503089en-000801) . . . . . . . . . . .19
Pump instruction PAHT G 20-32 and PAHT G 50-90 (AN077186502937en-000401) . . . . . . . .33
Electric motor manual (180R9230) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Parts list PAHT G (AX319828953697en-000601) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Trouble shooting guide for PAH, PAHT, PAHT G, PAHT 674 and PAH F pumps . . . . . . . . . . . . .59
Right and wrong - Trouble shooting guide for water hydraulic systems (180R9042). . . . . . .71
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
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Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
Validity This manual is valid for PAHT G pumps both not
ATEX certified versions. ATEX certified pumps are indicated by Ex in the designation - example
PAHT G 20 Ex.
In case the pump delivered is ATEX certified, the additional ATEX instruction must also be read.
PAHT G 20
PAHT G 25
PAHT G 32
PAHT G 50
PAHT G 63
PAHT G 70
PAHT G 80
PAHT G 90
Code no.
Serial no.
Code no.
Serial no.
Code no.
Serial no.
Code no.
Serial no.
Code no.
Serial no.
Code no.
Serial no.
Code no.
Serial no.
Code no.
Serial no.
Non ATEX
180B1009
XXXXXX 02 -XXX
180B1010
XXXXXX 02 -XXX
180B1011
XXXXXX 02 -XXX
180B1012
XXXXXX 02 -XXX
180B1013
XXXXXX 03 -XXX
180B1014
XXXXXX 03 -XXX
180B1015
XXXXXX 03 -XXX
180B1016
XXXXXX 03 -XXX
PAHT G 20 Ex
PAHT G 25 Ex
PAHT G 32 Ex
PAHT G 50 Ex
PAHT G 63 Ex
PAHT G 70 Ex
PAHT G 80 Ex
PAHT G 90 Ex
ATEX
180B6119
XXXXXX 02 -XXX
180B6120
XXXXXX 02 -XXX
180B6121
XXXXXX 02 -XXX
180B6185
XXXXXX 02 -XXX
180B6186
XXXXXX 03 -XXX
180B6187
XXXXXX 03 -XXX
180B6188
XXXXXX 03 -XXX
180B6189
XXXXXX 03 -XXX
MADE IN DENMARK
Pump
Type PAHT G
Serial no.
Code no.
The serial number is referring to the Serial no. on the product label. The digits shown (03) indicate the version number of the pump.
This documentation is compatible with previous pump versions.
4 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
1. Introduction 1.1 General
The PAHT G pumps and pump units are manufactured by Danfoss A/S, and are sold and marketed by a net of authorized distributors world wide.
This manual contains the necessary instructions for the installation, operation and service of the pumps used for technical water.
In case the pump delivered is ATEX certified, the additional ATEX instruction must also be read.
The PAHT G pumps must not be used for other purposes than those recommended and specified without first consulting your local pump distributor.
• If any changes are made without written approval the warranty will automatically become void.
It is important that these instructions are always available to the personnel concerned.
1.2 Symbols
Indicates something to be noted by the reader
Indicates a situation which will or could result in damage to the pump and its function
Use of the pump in other applications not suitable for the pump unit can cause damages to the pump unit, with risk of personal injury.
Indicates a situation which will or could result in personal injury and/or damage to the pump
All personnel being responsible for operation and maintenance of the pump unit must read and fully understand these instructions, especially the section “Safety”, before:
• Transportation of the pump unit
• Lifting the unit
• Installing the pump unit
• Connecting the pump unit to the water system
• Connecting the electric motor and instrumentation
• Commissioning the unit
• Servicing the motor pump unit, mechanical and electrical parts
• Decommissioning the motor pump unit
The pump must always be installed and used in accordance with existing national/local sanitary, safety regulations and laws.
It is the responsibility of the safety officer or the chief operator to assure compliance with all local regulations that are not taken into account in this manual.
Electrical hazard - Indicates a high- voltage warning
Safety glasses required
Hearing protection required
Safety shoes required
Safety helmet required
!
Protective garments must be worn
Protective garments must be worn
Danger HOT.
Do not touch
Electrical hazard
Electrical hazard
Changing the pumps’ or pump units’ operational limits and hardware:
• Changes to the delivered pump or motor pump system may only be done with a written approval from Danfoss High Pressure
Pumps.
• Operation outside the Danfoss specifications requires a written approval from Danfoss
High Pressure Pumps.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
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6
Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
1.3 Manufacturer and customer service address:
Danfoss A/S
High Pressure Pumps
Nordborgvej 81,
DK-6430 Nordborg
Denmark
Telephone: +45 7488 2222
Fax: +45 7445 3831
Email: [email protected]
Web: hpp.danfoss.com
Your local Danfoss pump distributor can be found on our homepage.
1.4 Country specific information
1.4.1 United Kingdom
UK importer:
Danfoss Ltd.
22 Wycombe End
HP9 1NB Beaconsfield
United Kingdom
2. Safety
2.1 General information
Dangers that can arise from not following the instructions:
When the pump or pump system is managed by untrained personnel, there is a danger of:
• Death or fatal injuries
• Costly damages and claims
All electrical installation work must only be carried out by authorized personnel in
accordance with EN60204-1 and/or local regulations.
It is recommended to install a lockable circuit breaker to avoid inadvertent starting and/or electrical hazard. The lockable circuit breaker must be used during installation, operation and maintenance.
It is recommended to place a local safety switch nearby the pump, enabling service personnel to cut power for the electric motor.
Protect the motor and other electrical equipment from overloads with suitable equipment.
In case the pump delivered is ATEX certified, the additional ATEX instruction must also be read.
!
Electrical hazard
Protective garments must be worn
Under certain operational conditions the surface of the pump can be above 60°C / 140°F.
Under these conditions the pump must be labelled with a “Danger Hot” sign.
When using an electric motor, the motor must always be supplied with adequate cooling ventilation.
When using an electric motor together with a
VFD ( V ariable F requency D rive), the motor must be designed for operation with VFD. VFD operation may increase the temperature inside the electric motor if the motor is not designed for VFD operation. This can damage the motor and cause unintended breakdown.
Before start-up, the settings for all protective devices, such as sensors/switches and safety valves must be verified and free flow from safety valves must be ensured.
All pipe and hose connections must be stressfree mounted, securely fastened to the pump and well supported. Improper installation will or could result in personal injury and/or damage to the pump.
Use of this manual does not relieve operation and maintenance personnel of the responsibility of applying good judgment when operating and maintaining the pump and its components.
Always wear suitable safety clothing when handling the pump.
When working near the pump system, safety shoes, safety glasses, hearing protection and safety helmet must always be worn.
2.2 Preferred system design
Danfoss recommends to build systems with a high degree of safety. Danfoss preferred system design and P&ID are found in appendix 1, Data sheet, and appendix 2, Instruction.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
It is always the system builders´ responsibility that the system design does not cause any kind of hazard and is adapted to local regulations and standards.
•
Proper installation, proper start up and shutdown devices as well as high-pressure protection equipment is essential.
•
•
•
2.3 Commissioning and servicing the unit
It is recommended that commissioning and servicing are carried out by a minimum of two people, where one is acting as a supervisor.
•
•
Do not try to lift the pump unit manually; most of the pumps weigh more than
20 kilos, see specific weight for the pump in the appendix 1, Data sheet.
Always bleed the pump prior to initial start-up.
Do not mount the pump without the bell housing and a flexible coupling.
Do not try to start the unit before the system components are mounted, bleeded and adjusted.
Flush the system throughly before connecting the pump or pump unit.
Check rotation direction of the motor before mounting the pump.
2.4 Adhere to the following important points
• Before using the pump/pump unit it is very important to read and understand this user manual.
2.5 In case of doubt
Please contact Danfoss A/S in case of doubt.
Contact information are listed in section 1.3,
Manufacturer and customer service address.
3. Technical data 3.2 Application range
See appendix 1, Data sheet.
3.3 Electric motor data
See recommended motor in appendix 1, Data sheet or appendix 3, IOM for motors. The motors mentioned are the most common used motors by Danfoss High Pressure Pumps.
3.4 Noise and vibration
Noise level for a pump unit with a ”standard” motor measured according to EN ISO 3744:2010, see appendix 1, Data sheet. Possibilities to reduce noise and vibration are described in the same Data sheet.
3.1 Approved applications and operational limits for the pumps
The pump and the pump units are designed for the use in systems with technical water.
The PAHT G pumps must not be used for other purposes than those recommended and specified without first consulting your local pump distributor.
3.5 Dimension drawings
Dimensions of the different pumps can be found in appendix 1, Data sheet.
3.6 Space requirement
When doing service or replacing the complete pump unit, it is recommended to have sufficient space available around the pump in order to ensure easy access. Sufficient space means at least 1 meter/40 inches around the pump. When working with high pressures, it is important to have the right space available around the pump as stated in the safety requirements.
Use of the pump in other applications not suitable for the pump unit can cause damages to the pump unit, with risk of personal injury.
For system integration of the pumps, please see appendix 1, Data sheet and appendix 2,
Instruction.
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3.7 Filtration
(10µm absolute [β
10
≥ 5000])
Requirements are specified in appendix 1, Data sheet and appendix 2, Instruction.
Danfoss recommends not to build a filter bypass function or use filters with an integrated bypass.
If the above recommendation is not followed the warranty for the pump will automatically become void.
It should be possible to monitor the condition of the filter via the differential/delta pressure across the filter.
Using insufficient filtration or a filter bypass can cause a failure or decreased service life of the pump.
3.8 Properties of water
It is recommended NOT to use the pump for other media than specified in the Data sheet.
3.9 Air bubbles
Large bubbles in a pressurised system can result in damage to piping, equipment and the pump.
All air must be bleeded from both the low- pressure and high-pressure side before the system is pressurised. Special consideration should be given in order to minimize air bubbles in the feed flow. Air bubbles can cause cavitation.
3.10 Chemicals
The pumps should not be exposed to any chemicals that can result in damage to piping, equipment and internal parts of the pump.
4. Arrival inspection, transportation, handling, lifting and storage
4.1 Arrival inspection
The pump is packed in a cardboard or wood box with plugs in the port connections to protect the pump from damage during transportation.
When the shipment has arrived it is important to check the pump for any damages. The name plate/type designation must be in accordance with the delivery note and your order.
In case of damage and/or missing parts, a report should be documented and presented to the carrier at once.
e.g. an overhead crane or industrial truck to be used as minimum.
4.4 Transport and handling
Small pumps which have a weight below 20 kilos
(weight can be found in appendix 1, Data sheet) can be handled by hand if they are not mounted together with an electric motor. The weight of a small pump with a motor will be above 20 kilos.
4.2 Warning
Before any lifting operation is performed, environmental conditions must be taken into consideration (Ex-rated areas, wind speed, wet/ dry conditions, lifting height, etc.).
4.3 General safety information
Personnel involved in lifting and transporting the equipment (see Safety, chapter 2) must be trained in handling and safety procedures when lifting heavy loads. Many of the pumps and pump units weigh more than 20 kilos, which requires lifting slings and suitable lifting devices;
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Pumps which have a weight above 20 kilos (see appendix 1, Data sheet) must be handled by using lifting eyes and slings.
Wrong lifting:
When lifting the pump unit, one sling must be attached to the electric motor and one sling around the pump.
Only some motors and pumps have specific lifting eyes.
Do not use connections/nozzles for lifting!
Do not use only one sling!
Make sure that the unit/load is balanced before lifting. The centre of the mass varies from pump/ pump unit size to pump/pump unit.
How to mount the pump and the electric motor correctly, see appendix 1, Data sheet or appendix
2, Instruction.
When the pump is mounted together with an electric motor, the pump unit always weigh more than 20 kilos and must be handled by using slings around the pump unit.
See below examples of where to/not to attach the lifting slings on the pump unit:
Correct lifting with 2 separate slings:
Incorrect lifting can result in personal injury and/or damage to the pump unit, see appendix
2, Instruction.
Once the lifting is done the lifting eye must be removed from the pump.
4.5 Return to supplier
Please see maintenance chapter 7.
4.6 Storage
Each pump is tested before shipment, and will therefore contain water. For storage temperature and frost protection see appendix 2, Instruction.
The pumps are NOT delivered frost protected from the factory.
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5. Installation and commissioning
5.1 Important dimensions
Physical dimensions and connections of the pump unit are described in appendix 1, Data sheet.
5.3 Fluid temperature
Before start-up, the fluid and pump housing temperature must be within the specified temperature range listed in appendix 1, Data sheet.
5.2 Cleanliness
It is very important that the tubes and pipes are completely clean : no dirt, chips or burrs are allowed.
Flush all piping before connecting the high- pressure pump to ensure the system is clean.
Internal surfaces of the piping must not be corroded. If dirt or rust is not removed, the pump and the valves can be damaged. In worst case the pump can be damaged beyond repair!
5.4 Electrical data
Check voltage, current frequency and rated power on the electric motor and VFD settings on the name plate placed on both the motor and the VFD.
5.5 Local regulations
Commissioning must always be done in
accordance with valid regulations and local standards.
Open system design
1 4
PI
5 2 5
PI
6
SYSTEM
8 3
Closed system design (not applicable for PAHT/PAHT G 256-308)
7
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5.6 Pre mounting checklist, based on Danfoss preferred system designs
Table 1: Check points when assembling and commissioning system
CP1
CP2
Check points
Ensure that the environmental conditions are safe.
Minimum and maximum start-up temperature for fluid and pump.
CP3 Filtration condition (10µm absolute (β
10
≥ 5000)
Comment
See Arrival inspection, transportation, handling, lifting and storage, chapter 4.
See Data sheet or Instruction, appendices 1 and 2.
See Danfoss requirements in
Data sheet and Instruction, appendices 1 and 2
CP4 Power supply for electric motor and VFD.
CP5 Safety circuit / breaker must be sized for the motor and environment (corrosion and humidity)
CP6 Bolts and screws must conform to environmental conditions as well as fluid and torque requirements.
CP7 Instrumentation, pressure switch should be designed to conform to the environment (corrosion and humidity).
See Data sheet for the used motor and VFD.
See Data sheet for the used safety circuit.
CP8 Check the factory settings of the safety/relief valves or pressure relief valves (1).
CP9 Check the settings of the pressure transmitter/switch (2) set at min. inlet pressure.
See Data sheet for the used equipment.
See Data sheets for the used valves.
See Data sheet or Instruction, appendices 1 and 2.
CP10 Check that all pressure indicators (PI) are selected to be able to measure the system pressure range.
CP11 Check coupling distance ( air gab – movement of the spider ) 3 – 5 mm
CP12 Check correct connections on the pump ( in & outlet)
CP13 Check piping for possible air gaps.
Scaling should at least be 1 Bar or more precise.
OK ?
5.7 Lifting and positioning
Lift the pump unit onto base (Remember vibration dampers, if needed). Fasten the motor to the base.
See also chapter 4, Arrival inspection, transportation, handling, lifting and storage.
5.8 Mount the different equipment
(connections, pipes, tubes, check and safety/relief valves, etc.)
• The hard piping and flexible hoses used must be of proper design and must be installed in accordance with the manufacturer’s recommendations.
• Misalignment of the hard pipes may give unintended stress on the pump port connection and may damage the pump.
• Prevent excessive external pipe load.
• Do not connect piping by applying external force (use of wrenches, crane, etc.) Piping must be aligned without residual stress.
• Do not mount expansion joints so that their force applies internal pressure on the pump connections.
5.9 Electrics
All electrical installation work must be carried out by authorized personnel in accordance with
EN60204-1 and/or local regulations. (see also
Safety, chapter 2)
Turn off the safety circuit breaker and lock it.
Mount the power cable on the electric motor.
If a VFD is used, adjust the protective motor switch/VFD to the current limits found on name plate of the electric motor.
5.10 Instrumentation
The pressure switch/sensor should be mounted as close to the pump as possible. It is recommended to test the pressure/sensor switch via an instrumentation manifold.
Mount the pressure switch/sensors according to the manufacturer’s instructions.
5.11 Connections
Mount and tighten connections and check valve(s) as specified.
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5.12 Ensure free flow
Ensure free flow from relief valve (table 1, item
5.6, CP 8). A blocked relief valve can cause excessive build-up of pressure and thereby cause dangerous situations and damage to the whole system.
• Check the temperature switch/controls. The high-pressure pump must stop if temperature is above specified set point.
• Check the pressure switch/controls. The high-pressure pump must stop if pressure is below specified set point.
• If the system is running within the system design limits, the system is released for operation.
5.13 Verify setting of safety/relief valves
Make sure, the relief valve is placed correctly (see open system design, item 1).
Check the pressure settings on the name plate of the relief valve. If they are within specifications, you can continue.
5.14 Bleed and remove air from the pump
Open bleeding plugs. Keep the plugs open until the high-pressure pump is bleeded.
If the pump is submerged, remove all bleeding plugs before mounting in reservoir.
5.15 Verify direction of rotation
The direction of rotation must always follow the arrow. The arrow is placed on the pump or pump unit.
Check the direction of rotation before mounting the pump.
Unlock the safety circuit breaker. Start the motor for 1 second and observe the direction of rotation either looking on the fan of the motor or on the coupling through the hole in the bell housing (not available on all bell housings). If the motor is turning the wrong direction, switch two phases in the connection box of the motor or reprogram the direction in VFD.
When the motor is turning in the right direction, the pump can be mounted.
•
•
5.16.2 Closed system (not applicable for
PAHT G 256-308)
•
Check if the reservoir is clean.
Check if filter element is present and mounted correctly.
Fill water at the reservoir using the filling
•
•
•
•
•
•
•
•
• valve. Inspect immediately for leakage.
Bleed high-pressure pump until only water leaves the high-pressure pump. Remember to close all bleeding and draining plugs.
Adjust pressure relief valve to minimum setting.
Check rotation of the high-pressure pump by description in 5.15.
Start high-pressure pump for 2 minutes, to make sure all air is out of the system.
Check reservoir low level switch/controls.
The high-pressure pump must stop if low level switch is activated.
Adjust pressure relief valve to working pressure.
Check the temperature switch/controls.
The high-pressure pump must stop if temperature is above specified set point.
Check the filter pressure switch/controls. A warning must be given if pressure is above specified set point.
If the system is running within the system design limits, the system is released for operation.
5.17 Check the filter condition
Evaluate contamination found in filter, replace filter elements, if necessary.
5.16 Commissioning
5.16.1 Open system
• Check if filter element is present and mounted correctly.
• Switch on the circuit breaker for both motor(s) and VFD(s).
• Check rotation of the feed pump.
• Start feed pump.
• Bleed high-pressure pump until only water leaves the high-pressure pump. Remember to close all bleeding and draining plugs.
• Adjust pressure relief valve to minimum setting.
• Check rotation of the high-pressure pump by description in 5.15.
• Start high-pressure pump for 2 minutes, to make sure all air is out of the system.
• Adjust pressure relief valve to working pressure.
• Check all fittings for leakage.
5.18 Instruct operator and maintenance personnel
Before using the pump/pump unit, the personnel must be instructed in using the pump/pump unit, its function, components, documentation and safety.
Danfoss offers commissioning and service at system manufacturer’s location. Rate quotes are offered upon request.
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6. Operation of motor pump unit
6.1 General safety information
Before inspecting the pump unit, read the Safety chapter 2 in this user manual.
6.2 What to listen and look for
If one or more of the following examples are observed, please act as indicated:
A) Loose bolts – check all bolts and, if necessary, contact the maintenance department in order to have all bolts tightened to the specified torque(s).
B) Leakage – if a small leakage from the bell housing is observed. Contact the maintenance department.
C) Leakage – if there is a large leak, the unit should be stopped immediately. Contact the maintenance department.
D) High frequency tones – safety/relief valves are either damaged or running very close to their design pressure, stop the unit immediately. Contact the maintenance department.
E) Increased noise or vibration – requires the unit to be stopped immediately. Contact the maintenance department.
F) Very high temperatures – may indicate that one or more parts are damaged inside the pump. The pump must be stopped immediately and inspected before it is restarted. Contact the maintenance department.
G) Drop in flow and/or pressure – may indicate wear on one or more parts inside the pump. The pump must be stopped immediately and inspected before it is restarted. Contact the maintenance department.
H) Other observations or troubles, please see appendix 7, Right and Wrong or appendix
6, Trouble shooting guide. Both appendices give good advises on design, installation, wiring and troubleshooting.
If the pump is not stopped for inspection as recommended, it can lead to damage of the pump or break-down. See also service and warranty section in appendix 1, Data sheet and appendix 2, Instruction.
Danfoss offers service of the pump at the system manufacturer’s location as well as we offer training in how to service the pump. Quotes are offered upon request.
Danfoss recommends simultaneously to check the filter and membrane condition and to evaluate contamination; filter and membrane elements must be replaced if necessary.
7. Maintenance and service of the pump unit 7.1 General safety information
Before servicing the pump unit, it is necessary to read and understand this user manual, especially the Safety, chapter 2. Remember to wear suitable safety equipment according to Safety, chapter 2.
Danfoss offers service of the pump at the system manufacturer’s location and training in how to service the pump. Quotes are offered upon request.
7.2 Service and inspection interval for the pump
Maintenance and service intervals are depending on the cleanliness level of the water, hydraulic load and temperature of the pump unit. The most important parameter is the filtration of the water.
7.3 Shut down of the system
A) Stop the high-pressure pump.
B)
C)
Release the pressure.
Stop the feed pump if used.
See the section Service and warranty in the appendix 1, Data sheet and appendix 2, Instruction.
For spare parts and service tools, please see appendix 4, Parts list.
D) Switch off the safety circuit breaker for both the high-pressure pump, feed pump and VFD and lock them. Only personnel servicing the pump unit should be able to unlock/activate the switch again.
E) Open bleeding and drain plugs. Wait until the pump and system are emptied for water.
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Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
F) Slowly unscrew and remove the bolts and gaskets from the inlet/outlet hoses or pipes, be careful about jets of water. Be aware that the system can be pressurized.
G) Attach the lifting equipment to the pump unit. For instructions on lifting the complete pump unit, see chapter 4, Arrival inspection, transportation, handling, lifting and storage.
H) For the small pumps, unscrew the bolts holding the pump to the bell housing and for the bigger pumps, unscrew the bolts/ nuts from the pump and bell housing to the motor and afterwards unscrew the bolts/nuts holding the pump and bell housing.
Returns without a return number will be rejected !!!
7.5 Assembling the pump unit
Assemble the pump according to the Disassembling and Assembling Instruction (available at www. danfoss.high-pressurepumps.com).
I) Carefully pull the pump out of the bell housing by using lifting equipment, if necessary.
J) Hold the pump in different positions above a drip tray; this should allow most of the water trapped in the pump to drain. Clean and dry the pump surface and plug the bleeding and draining plugs.
B) Disassemble the pump according to the
Disassembling and Assembling Instruction
(available at www. danfoss.high-pressurepumps.com).
Clean all the parts and surfaces with a fluid compatible with the materials found in the pump. Wipe the parts clean and dry with a lint-free clothing.
C) Inspect all parts including shaft seal and if necessary, replace them; see appendix 4,
Parts list.
7.6 Procedure for mounting the pump back onto electric motor
Mount the flexible coupling and bell housing according to appendix 2, Instruction.
K) Move the pump to a clean and safe location where the pump can be inspected/ serviced.
7.4 Disassembling and assembling the pump unit
A) Remove all connections from the pump.
7.7 Getting the pump unit back into operation
Find instructions of how to put the pump unit back into operation in chapter 4, Arrival inspection, transportation, handling, lifting and storage and Installation and commissioning, chapter 5.
7.8 Storage of the pump
If the pump has to be shut down for a longer period, instructions can be found in appendix 2,
Instruction.
D) If the pump is going to be returned to
Danfoss for repair or a warranty claim, it is important to contact Danfoss in order to receive a return number and a form to fill out with product information. A copy of the form together with contact information and reason for returning should be sent to the email address on the form. The same documents should be attached to the shipment.
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8. Troubleshooting and scrapping criteria
8.1 General safety information
Before inspecting the pump unit, it is necessary to read and understand this user manual, especially the Safety chapter 2.
Remember to wear suitable safety equipment according to Safety chapter 2.
•
•
•
•
•
•
•
•
•
•
•
8.2 Operational conditions which can cause pump failures
The following conditions can cause a pump failure :
The pump is running dry.
The inlet pressure is too high.
The inlet pressure is too low.
The temperature of the fluid is too high.
The ambient temperature is too high.
The pump is running against a blocked port/closed manual valve.
The pump is operating at a pressure out of specification.
The pump is running with a non-specified/ approved fluid.
The pump is running in the wrong direction.
The filtration is insufficient.
There is excessive mechanical load on the shaft coupling and piping.
Electrical hazard
8.4 Electrical failure
If the wiring of the electric motor is incorrect or the ground connection is missing, it can cause electric shock, burn damages, fire or even death.
If a VFD is used and wrongly programmed, it can damage the pump and lead to high temperatures or other dangers.
All electrical installation must be carried out by authorized personnel in accordance with
EN60204-1 and/or local regulations.
8.5 Responsibility
Danfoss takes no responsibility for any abnormal injuries, risks or damages that could arise caused by abnormal conditions, vibrations, corrosion, abrasives, foreign objects or excessive temperatures and shall not be liable for any consequential or incidental damages.
8.6 Scrapping criteria
Whether the pump can be repaired or need to be scrapped, depends on in which conditions the internal parts are, or how damaged the whole unit is. Please use appendix 5, Trouble shooting guide as guideline or send the pump to Danfoss headquarter in Denmark for evaluation.
For other observations or troubles, please see appendix 6, Right and Wrong which gives good advises regarding design, installation, wiring and troubleshooting.
In case the pump needs to be scrapped, please follow your local environmental rules.
8.3 Mechanical failure
If the pump is running dry, the temperature will quickly increase which can cause burns.
If there is any leakage at start-up or during operation, a high pressure jet can cause eye or skin damage.
Leakage can result in flooding, which can cause slipping, tripping or falling.
If water is dripping into the electric motor; it can cause electric shock, fire, short of circuit or even death. When mounting the pump vertically, always mount the motor above the pump to avoid water leaking into the electric motor.
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Operation guide
Appendices
PAHT G 20-90
Installation, Operation and
Maintenance Manual hpp.danfoss.com
Operation guide | Installation, Operation and Maintenance Manual for PAHT G 20-90 pumps
Table of Contents
3.
4.
1.
2.
5.
6.
Data sheet PAHT G 2-308 / ATEX PAHT G pumps (AI106586503089en-000801) . . . . . . . . . . .19
Pump instruction PAHT G 20-32 and PAHT G 50-90 (AN077186502937en-000401) . . . . . . . .33
Electric motor manual (180R9230) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Parts list PAHT G (AX319828953697en-000601) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Trouble shooting guide for PAH, PAHT, PAHT G, PAHT 674 and PAH F pumps . . . . . . . . . . . . .59
Right and wrong - Trouble shooting guide for water hydraulic systems (180R9042). . . . . . .71
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Data sheet
Data sheet
PAHT 2-308 pumps /
PAHT G 2-308 pumps /
ATEX PAHT G pump
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
Table of Contents Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2. Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3. Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.
4.2
4.3
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
PAHT G 20-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
PAHT G 50-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5. Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
5.3
5.4
PAHT G 20-32 typical flow curves at max pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
PAHT G 50-90 typical flow curves at max pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
6. Motor requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
7. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
7.1 Filtration
7.2 Noise
7.3
7.4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Open-system design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Closed-system design (not applicable for PAHT G 256-308). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
8.3
8.4
PAHT G 20-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
PAHT G 50-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
9. Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
1. Introduction
•
•
•
The Danfoss range of PAHT G high-pressure pumps is specifically designed for use with technical water such as:
Ultra-pure water that has undergone multiple reverse osmosis processes
De-ionized water
Demineralized water
The range of PAHT G pumps is based on the standard PAHT pump series. The PAHT G pumps are made with extra coatings that reduce the wear of the pump. This coating is particularly important for pumps used in gas turbine applications or other similar applications where the wear of the pumps is higher due to the ultra pure water quality.
Danfoss PAHT G pumps are positive displacement pumps, with axial pistons that move a fixed amount of water in each cycle. Flow is proportional to the number of input shaft revolutions
(rpm). Unlike centrifugal pumps, they produce the same flow at a given speed independently of no matter what the discharge pressure.
The next pages will cover both PAHT G and PAHT
G ATEX pumps.
ATEX certified pumps are indicated by Ex in the type designation - example PAHT G 12.5 Ex.
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Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
Below sectional drawing is an example of a PAHT G pump.
1: Mounting flange
2: Shaft seal
3: Connecting flange
4: Port plate
5: Valve plate
6: Retainer plate
7: Swash plate
8: End cap
9: Spring
10: Piston
11: Cylinder barrel
12: Housing with bearing
2. Benefits
•
•
- Oil lubricants are replaced with the pumped medium, water, so there is no
• contamination risk from the pump.
Low maintenance costs:
- Efficient design and all-stainless steel construction ensure exceptionally long
• lifetime. When Danfoss specifications are met, service intervals of up to 8,000 hours can be expected. Service is easy, and can be carried out on site due to the simple design and few parts.
Low energy costs:
- The highly efficient axial piston design provides the lowest energy consumption of any comparable pump on the market.
Easy installation:
- The lightest and most compact design available.
•
- Pump can be installed horizontally or vertically.
- No pulsation dampeners necessary due to extremely low-pressure pulsation.
- Powered by electric motors or combustion engines.
- Suitable for both boosted inlet pressure and water supply from a tank.
- No need for cooling circuits due to very high mechanical efficiency.
Certified quality:
- Fulfills the stringent hygiene requirements, VDI 6022, HACCP.
- Certificates:
ISO 9001, ISO 14001
ATEX available
API available on request
3. Application examples •
•
•
High-pressure cleaning with ultra-pure water, as used in the manufacturing of flat-panel displays and many other electronic products.
High-pressure cleaning with ultra-pure water, as used in the manufacturing of parts for the automobile industry.
Adiabatic cooling systems to replace or supplement standard A/C systems in server rooms and factories.
•
•
•
Humidification in office buildings, electronic component manufacturing, dairies, greenhouses, etc.
Dust suppression and odor control systems, for example in paper, textile and wood production.
Reduction of NOx emissions in diesel engines and gas turbines.
• Gas turbine by inlet fogging and fuel wash
systems.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
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Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
4. Technical data 4.2 PAHT G 20-32
Pump size
Code number PAHT G
20 25
180B1009 180B1010
32
180B1011
Code number ATEX PAHT G 180B6119 180B6120 180B6121
Housing material AISI 316 or higher
AISI 316 or higher
AISI 316 or higher
Geometric displacement cm³/rev in³/rev
20
1.22
25
1.53
32
1.95
Pressure
Min. outlet pressure
Max. outlet pressure )
Inlet pressure, continuous
Max. inlet
1) pressure, peak 2) barg psig barg psig barg psig barg psig
30
435
100
1450
0-6
0-87
20
290
30
435
160
2320
0-6
0-87
20
290
30
435
160
2320
0-6
0-87
20
290
Speed
Min. speed
Min. speed, continuous rpm rpm
700
1000
700
1000
Max. speed rpm 2400
Typical flow - Flow curves available in section 5
2400
1000 rpm at max pressure
1500 rpm at max pressure l/min l/min
1200 rpm at max. pressure
1800 rpm at max. pressure gpm gpm
Typical motor size
16.9
27.0
5.4
8.6
20.6
33.2
6.7
10.6
1500 rpm at max. pressure
1800 rpm at max. pressure
Torque at max. outlet pressure
Media temperature
Ambient temperature
Sound pressure level
Weight
3) kW
50Hz hp
60Hz
Nm lbf-ft
°C
°F
°C
°F dB(A) kg lbs
5.5
7.5
21.0
15.5
2-50
37-122
0-50
32-122
79
19
42
11.0
20.0
69.2
51.1
2-50
37-122
0-50
32-122
79
19
42
700
1000
2400
28.0
44.2
9.0
14.0
15.0
20.0
79
19
42
89.0
65.7
2-50
37-122
0-50
32-122
22
1) Above 1800 rpm inlet pressure 2-6 barg
2)
3)
1% per minute peak, 10% per minute during start up.
Measurements according to EN ISO 3744: 2010 / dB(A) [L
PA, 1m
Measured at max pressure and rpm for a motor pump unit
] values are calculated.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
4.3 PAHT G 50-90
Pump size
Code number PAHT G
50 63 70 80 90
180B1012 180B1013 180B1014 180B1015 180B1016
Code number ATEX PAHT G 180B6185 180B6186 180B6187 180B6188 180B6189
Housing material AISI 316 or higher
AISI 316 or higher
AISI 316 or higher
AISI 316 or higher
AISI 316 or higher
Geometric displacement cm³/rev in³/rev
50
3.05
63
3.84
70
4.27
80
4.88
90
5.49
Pressure
Min. outlet pressure
Max. outlet pressure
Inlet pressure, continuous
Max. inlet 1) pressure, peak barg psig barg psig barg psig barg psig
0-6
0-87
20
290
30
435
80
1160
30
435
160
2320
0-6
0-87
20
290
30
435
160
2320
0-6
0-87
20
290
30
435
160
2320
0-6
0-87
20
290
30
435
160
2320
0-6
0-87
20
290
Speed
Min. speed
Min. speed, continuous rpm rpm
700
1000
700
1000
Max. speed rpm 1800
Typical flow - Flow curves available in section 5
1800
1000 rpm at max. pressure
1500 rpm at max. pressure l/min l/min
1200 rpm at max. pressure
1800 rpm at max. pressure gpm gpm
Typical motor size
43.7
68.7
14.0
21.8
50.5
82.1
16.4
26.3
1500 rpm at max. pressure
1800 rpm at max. pressure
Torque at max. outlet pressure
Media temperature
Ambient temperature kW
50 Hz hp
60 Hz
Nm lbf-ft
°C
°F
°C
°F
11
20
68.5
50.6
2-50
37-122
0-50
32-122
30
50
172.6
127.4
2-50
37-122
0-50
32-122
Sound pressure level 2)
Weight dB(A) kg lbs
81
34
75
86
34
75
700
1000
1800
57.7
92.9
18.7
29.6
30
50
191.8
141.5
2-50
37-122
0-50
32-122
86
34
75
700
1000
1800
68.3
108.5
21.9
34.5
37
60
219.8
162.2
2-50
37-122
0-50
32-122
86
34
75
700
1000
1800
77.6
122.6
24.9
38.9
45
75
246.6
182.0
2-50
37-122
0-50
32-122
86
34
75
1)
2)
1% per minute peak, 10% per minute during start up.
Measurements according to EN ISO 3744: 2010 / dB(A) [L
PA, 1m
] values are calculated.
Measured at max pressure and rpm for a motor pump unit.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
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Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
5. Flow The flow (Q eff
) at various pressure (p max calculated with the following equation:
) can be
Q eff
= Q
(th)
– [(Q
(th)
– Q (p max
)) x (p / p max
)]
The theoretical flow can be calculated with the following equation:
Q
(th)
=
V x n
1000
At zero pressure the true flow equals the theoretical flow Q
(th)
.
Q
Q (p p p:
V: n:
(th) max
: max
Theoretical flow (l/min / gpm)
): Flows at max. pressure (l/min and gpm), see 4.1-4.4
: Max pressure (barg / psig)
Pressure (barg / psig)
Displacement (cm 3 / rev.)
Motor speed (rpm)
5.3 PAHT G 20-32 typical flow curves at max pressure l/min l/min
80
70
70
40
40
30
30
60
60
50
50
20
20
10
10
0
0
70
0
70
0 95
95
0
0
12
12
00
00 14
14
50
50 17
00
17
00 19
50
19
50 22
00
22
00 24
24
00
00
PAHT 32
PAHT 32
PAHT 25
PAHT 25
PAHT 20
PAHT 20
15
15
10
10
5
5 gpm gpm
25
20
20
0
0
70
0
70
0 95
95
0
0
12
12
00
00 14
14
50
50 17
00
17
00 19
50
19
50 22
22
00
00 24
24
00
00
PAHT 32
PAHT 32
PAHT 25
PAHT 25
PAHT 20
PAHT 20
24 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
5.4 PAHT G 50-90 typical flow curves at max pressure
70
0
95
0
14
50
17
00
18
00
70
0
95
0
14
50
17
00
18
00
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
25
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
6. Motor requirements The required motor power can be calculated by using the following equation:
P = n x V x p
600.000 x η
P: Power (kW)
M: Torque (Nm)
η: Mechanical efficiency p: Pressure (barg) n: Motor speed (rpm)
V: Displacement (cm 3 /rev.)
From the flow curves in item 5, you can determine the rpm of the pump at the desired flow.
The required torque is calculated as follows:
M =
V x p
62.8 x η
To determine the correct motor size, both the power and torque requirement must be verified.
The mechanical efficiency of the pump, at max pressure, is as follows:
PAHT G 20, 25, 32, 50, 63, 70, 80, 90 0.95
26 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
7. Installation See the figure below for instructions on how to mount the pump and connect it to an electric motor or combustion engine.
A B C D
A: Pump
B: Bell housing
C: Coupling
D: Motor
If alternative mounting is required, please contact your Danfoss sales representative for further information.
Note: Do not add any axial or radial loads to the pump shaft.
For more information on the importance of proper filtration, including explanation of filtration principles, definitions, and guidance on how to select the right filter for your pump, please consult our Filtration information and specifications (Danfoss document number
521B1009).
7.1 Filtration
Proper filtration is crucial for the performance, maintenance and warranty of your pump.
Protect your pump, and the application in which it is installed, by always ensuring that filtration specifications are met, and by always changing filter cartridges according to schedule.
Since water has very low viscosity, Danfoss
PAHT G pumps have been designed with very narrow clearances in order to control internal leakage rates and improve component performance. To minimize wear on the pump, it is therefore essential to filter inlet water properly.
The main filter must have a filtration efficiency of 99.98% at 10 μm. We strongly recommend that you always use precision depth filter cartridges rated 10 μm abs. β
10
≥ 5,000.
Please note that we do not recommend bag filters or string-wound filter cartridges , which typically have only 50% filtration efficiency. This means that out of 100,000 particles that enter such filters, 50,000 particles pass right through them; compare this to precision depth filters that are 99.98% efficient, and only allow 20 of the same 100,000 particles to pass through.
7.2 Noise
Since the pump unit is mounted on a frame, the overall noise level can only be determined for a complete system. To minimize vibrations and noise throughout the system, it is therefore very important to mount the pump unit correctly on a frame with dampers and to use flexible hoses rather than metal pipes where possible.
The noise level is influenced by:
• Pump speed:
High rpm makes more fluid/structure-
• borne pulsations/vibrations than low rpm.
Discharge pressure:
High pressures make more noise than low pressures.
•
•
•
Pump mounting:
Rigid mounting makes more noise than flexible mounting because of the structureborne vibrations. Be sure to use dampers when mounting.
Connections to pump:
Pipes connected directly to the pump make more noise than flexible hoses because of structure-borne vibrations.
Variable frequency drives (VFDs):
Motors regulated by VFDs can produce more noise if the VFD does not have the right settings.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
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Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
7.3 Open-system design
A Inlet line:
Dimension the inlet line to obtain minimum pressure loss (large flow, minimum pipe length, minimum number of bends/ connections, fittings with small pressure losses and restrictions).
B Inlet filter:
Install the inlet filter (1) in front of the
PAHT G pump (2). Please consult the
Danfoss filter data sheet for guidance on how to select the right filter.
C Monitoring pressure switch:
Install the monitoring pressure switch (3) between the filter and the pump inlet. Set the minimum inlet pressure according to specifications described in item 4, technical data. The monitoring pressure switch stops the pump if inlet pressure is lower than the set minimum pressure.
D Monitoring temperature switch:
Install the monitoring temperature switch
(4) between the filter and the pump, on either side of the monitoring pressure switch. Set the temperature value according to technical data, item 4. The monitoring temperature switch stops the pump if inlet temperature is higher than the set value.
E
F
Hoses:
Always use flexible hoses (5) to minimize vibrations and noise.
Inlet pressure:
In order to eliminate the risk of cavitation and other pump damage, pump inlet pressure must be maintained according to specifications described in item 4, technical data.
G Non-return valve (6):
Should be installed after the outlet to prevent pump backspin, which may ruin the pump.
H Pressure relief valve:
As the Danfoss PAHT G pump begins to create pressure and flow immediately after start-up regardless of any counter pressure, a pressure relief valve (7) should be installed to prevent system damage.
Note: If a non-return valve is mounted in the inlet line, a low-pressure relief valve is also recommended between the non-return valve
(8) and the pump to protect against high-pressure peaks.
1 4 5 2 5 6
PI PI
SYSTEM
8 3 7
28 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
7.4 Closed-system design (not applicable for PAHT G 256-308)
A Inlet line:
Dimension the inlet line to obtain minimum pressure loss (large flow, minimum pipe length, minimum number of bends/ connections, fittings with small pressure losses and restrictions).
B Inlet filter:
Install the filter (1) in front of the tank (2).
Please consult the Danfoss filter data sheet for guidance on how to select the right filter.
C Monitoring pressure switch:
Install the monitoring pressure switch (3) in front of the filter (1). Set the maximum inlet pressure to 2 barg (29.0 psig). The monitoring pressure switch will stop the pump (5) if inlet pressure is higher than 2 barg (29.0 psig), indicating that the filter element must be changed.
D Monitoring temperature switch:
Install the monitoring temperature switch
(4) in the tank. Set the temperature value according to technical data, item 4. The monitoring temperature stops the pump if inlet temperature is higher than the set value.
E Hoses:
Always use flexible hoses (6) to minimize vibrations and noise.
F Inlet pressure:
In order to eliminate the risk of cavitation and other pump damage, pump inlet pressure must be maintained according to specifications described in item 4, technical data.
G Non-return valve (7):
Should be installed after the outlet to prevent pump backspin, which may ruin the pump.
H Pressure relief valve:
1
As the Danfoss PAHT G pump begins to create pressure and flow immediately after start-up regardless of any counter pressure, a pressure relief valve (8) should be installed to prevent system damage.
System water filling: I
To ensure proper filtration of new water
(10) supplied to the system, always use the filling valve (9).
J Minimum level switch:
Install the minimum level switch (11) above the outlet of the reservoir. The level switch must stop the pump if the water in the reservoir is below the switch, which indicates that the reservoir is empty.
PI
3
4
5
2
5
PI
7
6
System
2
11 4
Reservoir
PI
6
5
6
PI
7
System
1
9
10
8
3
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
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Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
8.3 PAHT G 20-32
30 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Data sheet | PAHT G 2-308 and ATEX PAHT G pumps
8.4 PAHT G 50-90
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
31
9. Service Danfoss PAHT G pumps are designed for long periods of service-free operation to ensure low maintenance and life cycle costs. Provided that the pump is installed and operated according to
Danfoss specifications, Danfoss PAHT G pumps typically run up to 8,000 hours. However, the service schedule for your Danfoss PAHT G pump may vary according to the application and other factors.
The life of a pump may be greatly shortened if
Danfoss recommendations concerning system design and operation are not followed.
In our experience, poor filtration is the number one cause of pump damage.
•
•
•
•
Other factors that affect pump performance and lifetime include:
running the pump at speeds outside specifications
supplying the pump with water at temperatures higher than recommended
running the pump at inlet pressures outside specifications
running the pump at outlet pressures outside the specifications.
We recommend that you inspect your pump after 8,000 hours of operation even if it is running without any noticeable problems.
Replace any worn parts if necessary, including pistons and shaft seals, to keep your pump running efficiently and to prevent breakdown. If worn parts are not replaced, then our guidelines recommend more frequent inspection.
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.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
© Danfoss | DCS (im) | 2021.05
AI106586503089en-000801| 32
Instruction
Instruction
Pump instruction
PAHT/PAHT G 20-32 and
PAHT/PAHT G 50-90
Instruction
Table of Contents
Pump instruction PAHT G 20-32 and PAHT G 50-90
1. Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
System design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Closed water hydraulic systems, water recirculated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Closed-system design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Open-ended systems, water supply from tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Open-ended systems with direct water supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Open-system design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
General guidelines for calculation of pressure losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
General comments on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3. Building up the pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
3.2 Direction of rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.3 Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.4 Protection from too high system pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
3.5 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
3.5.1
3.5.2
PAHT G 20-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
PAHT G 50-90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
4. Initial start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
5. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
5.1 Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
5.2 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
5.3 Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
5.4 Dry running. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
5.5 Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
5.6 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
5.6.1
5.6.2
5.6.3
Water hydraulic systems, water recirculated. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Open-ended systems with water supply from tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Open-ended systems with direct water supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
6. Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
7.
7.1
7.2
7.3
Recommended service intervals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Inspection of pump parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
How to inspect the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
34 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Instruction
1. Identification
Pump instruction PAHT G 20-32 and PAHT G 50-90
PAHT G
Protective cap must be removed and thrown away before usage.
2. System design Systems can be either:
• Water hydraulic systems, in which the water is recirculated back to tank.
• Open-ended systems with water supply from a tank.
• Open-ended systems with direct water- supply (boosted pressure).
The design of the system must ensure that selfemptying of the pump during standstill is avoided.
The minimum boost pressure is 2 barg (29 psig) and the maximum peak pressure is 20 barg
(290 psig). The recommended normal boost pressure is 2-6 barg (29-87 psig) (3-7 barg
[43.5-101.5 psig] abs).
If it is unknown what the peak inlet pressure can be, then there should be a 15 barg (218 psig) safety relief valve on the inlet side of the pump.
Note: All mentioned pressures refer to
measures in the respective pump gauge ports.
The inlet pressure of the pump must never exceed the outlet pressure. This may typically occur in boosted or open-ended systems with supply direct from the tap and where a bypass valve is activated.
2.1 Closed water hydraulic systems, water recirculated
(The numbers 1- 3 refer to the drawing below ).
In order to eliminate the risk of cavitation, always ensure a minimum inlet pressure of 0 barg
(0 psig) (1 barg [14.5 psig] abs) by observing the following guidelines:
2.2 Closed-system design
A Inlet line:
Dimension the inlet line to obtain minimum pressure loss (large flow, minimum pipe length, minimum number of bends/ connections, and fittings with small pressure losses).
B Inlet filter:
Install the inlet filter (1) in front of the tank
(2). Place the tank above pump and pump inlet. Please consult the Danfoss filter data sheet for guidance on how to select the right filter.
C Monitoring pressure switch:
Install the monitoring pressure switch (3) in front of the filter (1). Set the maximum inlet pressure to 2 barg (29.0 psig). The monitoring pressure switch will stop the pump (5) if inlet pressure is higher than 2 barg
(29.0 psig), indicating that the filter element must be changed.
D Monitoring temperature switch:
Install the monitoring temperature switch
(4) in the tank. Set the temperature value according to technical data, item 4. The monitoring temperature stops the pump if inlet temperature is higher than the set value.
E Hoses:
Always use flexible hoses (6) to minimize vibrations and noise.
F Inlet pressure:
In order to eliminate the risk of cavitation and other pump damage, pump inlet pressure must be maintained according to specifications described in item 4, technical data.
G Non-return valve (7):
Should be installed after the outlet to prevent pump backspin, which may ruin the pump.
H Pressure relief valve:
As the Danfoss PAHT pump begins to create pressure and flow immediately after start-up regardless of any counter pressure, a pressure relief valve (8) should be installed to prevent system damage.
System water filling: I
To ensure proper filtration of new water
(10) supplied to the system, always use the filling valve (9).
J Minimum level switch:
Install the minimum level switch (11) above the outlet of the reservoir. The level switch must stop the pump if the water in the reservoir is below the switch, which indicates that the reservoir is empty.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
35
Instruction Pump instruction PAHT G 20-32 and PAHT G 50-90
36
2.3 Open-ended systems, water supply from tank
(The numbers 1-3 refer to the drawing below ).
In order to eliminate the risk of cavitation, always ensure a minimum inlet pressure of 0 barg
(0 psig) (1 barg (14.5 psig) abs) by observing the following guidelines:
C Monitoring pressure switch:
Install the monitoring pressure switch (3) between the filter and the pump inlet. Set the minimum inlet pressure according to specifications described in item 4, technical data. The monitoring pressure switch stops the pump if inlet pressure is lower than the set minimum pressure.
1) Place the tank above the pump (water level in the tank should always be above the pump).
2) Place the inlet filter before the tank.
2.4 Open-ended systems with direct water supply
The pump is supplied with water direct from the water supply or from a booster pump.
Recomended normal boost pressure is 2-6 barg
(29-87 psig) (3-7 barg [43.5-101.5 psig] abs).
D Monitoring temperature switch:
Install the monitoring temperature switch
(4) between the filter and the pump, on either side of the monitoring pressure switch. Set the temperature value according to technical data, item 4. The monitoring temperature switch stops the pump if inlet temperature is higher than the set value.
The inlet line connection must be properly tightened, as possible entrance of air will cause cavitation.
2.5 Open-system design
A Inlet line:
Dimension the inlet line to obtain minimum pressure loss (large flow, minimum pipe length, minimum number of bends/ connections, and fittings with small pressure losses).
B Inlet filter:
Install the inlet filter (1) in front of the PAHT pump (2). Please consult the Danfoss filter data sheet for guidance on how to select the right filter.
E
F
Hoses:
Always use flexible hoses (5) to minimize vibrations and noise.
Inlet pressure:
In order to eliminate the risk of cavitation and other pump damage, pump inlet pressure must be maintained according to specifications described in item 4, technical data.
G Non-return valve (6):
Should be installed after the outlet to prevent pump backspin, which may ruin the pump.
H Pressure relief valve:
As the Danfoss PAHT pump begins to create pressure and flow immediately after start-up regardless of any counter pressure, a pressure relief valve (7) should be installed to prevent system damage.
Note: If a non-return valve is mounted in the inlet line, a low-pressure relief valve is also required between the non-return valve (8) and the pump to protect against high-pressure peaks.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Instruction Pump instruction PAHT G 20-32 and PAHT G 50-90
1 4
PI
5
8 3
2.6 General guidelines for calculation of pressure losses
In smooth pipes and hoses
7
2 5
PI
6
SYSTEM
In 90° bends
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
37
Instruction Pump instruction PAHT G 20-32 and PAHT G 50-90
2.7 General comments on
Filtration
A good filtration is vital to ensure a long and trouble free life of the pump.
When selecting a filter or strainer, please note that filter materials should be compatible with water, i.e. should neither corrode or dissolve. Also be aware of the electrochemical series of the applied materials.
We recommend a separation (“wall”) to separate the inlet from the outlet end of the tank.
•
Pump suction line should be placed relatively high above the tank bottom in order to prevent settled particles from being led into the pump.
•
Main filter must have a fineness of 10 µm abs. β10 >5000.
The pressure loss across the filter should be monitored.
In
Please contact Danfoss High Pressure Pumps for further filter details.
Out
Water tank
Must be made of corrosion-proof material such as stainless steel or plastic and must be sealed to prevent entrance of impurities from the environment.
Automatic pressure equalization between tank and surroundings must be ensured.
Inlet from the water supply (the return line) and inlet to the pump should be placed in opposite ends of the tank to calm and deaerate the water, and to ensure optimum opportunity for particles to settle.
•
•
•
•
Monitoring
It is recommended to continuously monitor the following conditions:
Water level (if a tank is used)
Filter contamination
Pressure (inlet side of the pump)
Temperature (inlet side of the pump)
3. Building up the pump unit
3.1 Mounting
If alternative mounting is desired, please contact
Danfoss High Pressure Pumps.
Choose proper tolerances to ensure an easy mounting of the elastic coupling without use of tools.
Please take care to observe the recommended length tolerances of the chosen coupling, as an axial force on the pump shaft will prevent the pump from generating pressure (and over time damage the pump). min. 3 mm
38
A: Elastic coupling
B: Bell housing
C: Motor shaft
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Instruction Pump instruction PAHT G 20-32 and PAHT G 50-90
3.2 Direction of rotation
The direction of rotation is indicated by means of an arrow at the label of the pump.
CCW (counter clock wise)
3.3 Orientation
The pump can be mounted/orientated in any horizontal position and it can be mounted/ orientated in the vertical position with the shaft upwards. The pump cannot be vertically mounted/orientated with the shaft facing downwards.
CW (clock wise)
In
Out
3.4 Protection from too high system pressures
The pump should be protected against too high pressure by means of a pressure relief valve or a bypass/unloading valve placed on the pressure side.
The valve should be placed as close to the pump as possible.
The opening characteristics of the valve must not result in peak pressures higher than 200 barg
(2900 psig).
In
Out
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
39
Instruction Pump instruction PAHT G 20-32 and PAHT G 50-90
3.5 Connections 3.5.1 PAHT G 20-32
C
O
I
XI
I Inlet
D Drain (vertically mount)
O Outlet
C Bleeding
XI Gauge port inlet*
XO Gauge port oulet*
Parallel key:
PAHT G 20/25/32: 8 × 7 × 32, DIN 6885
XO C XI
* There are two 1/4” ports on the inlet side for optional mounting of ie switches for low pressure and temperature.
There is one 1/4” port on the outlet for optional mounting of i.e. pressure transducer.
Thread, ISO
Max tighten torque
PAHT G 20/25/32
Outlet (O)
3/4” BSPP with
16 mm long thread
90 Nm*
(66 lb(f)ft)
Inlet (I)
1 1/4” BSPP with
20 mm long thread
150 Nm*
(110 lb(f)ft)
Bleeding (C)
M6 (width across flat = 5mm)
4 Nm*
(3 lb(f)ft)
Gauge 1/4” ports
1/4” BSPP with
15 mm long thread
15 Nm*
(11 lb(f)ft)
* Recommended torque values refer to steel washers containing a rubber sealing element.
3.5.2 PAHT G 50-90
D XI D
C
I
O
XO C
XI
I Inlet
O Outlet
C Bleeding
D Drain (vertically mount)
XI Gauge port inlet*
XO Gauge port oulet*
PAHT G 50/63/70/80/90:
10 × 8 × 45.2 DIN 6885
* There are two 1/4” ports on the inlet side for optional mounting of ie switches for low pressure and temperature.
There is one 1/4” port on the outlet for optional mounting of i.e. pressure transducer.
40 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Instruction
4. Initial
start-up
Pump instruction PAHT G 20-32 and PAHT G 50-90
Thread, ISO
Max tighten torque
PAHT G 50/63/70/80/90
Outlet (O) Inlet (I)
1” BSPP with
24 mm long thread
1 ½” BSPP with
24 mm long thread
120 Nm*
(89 lb(f)ft)
180 Nm*
(133 lb(f)ft)
Bleeding (C)
M6 (width across flat = 5mm)
4 Nm*
(3 lb(f)ft)
* Recommended torque values refer to steel washers containing a rubber sealing element.
Gauge 1/4” ports
1/4” BSPP with
15 mm long thread
15 Nm*
(11 lb(f)ft)
Before start-up, loosen the top bleeding plug “C”.
When water appears from the bleeding plug, retighten the plug.
The piping/hose between inlet filter and pump must be flushed prior to initial start up of the pump to ensure that impurities are removed.
In
C
Out
5. Operation
WARNING!
Make sure that the direction of rotation of the electric motor corresponds to the direction of rotation of the pump.
5.1 Water quality
Water of drinking water quality, confirming to the EEC directive 98/83/EC and without abrasive sediments, demineralized water, de-ionised water, softened water and RO water.
Please contact Danfoss High Pressure Pumps sales organization in case of doubt.
5.2 Temperature
Fluid temperature:
Min. +3° C / 37,4° F to max. +50° C / 122° F
Ambient temperature:
Min. 0° C / 32° F to max. 50° C / 122° F
Storage temperature:
Min. -40° C / -40° F to max. +70° C / 158° F
To protect the pump from too high fluid temperature, a temperature switch of 50° C
(122° F) should be mounted on the inlet side. If the whole pump flow is bypassed over the relief valve, then the fluid tempe-rature will go up relatively fast.
5.3 Pressure
The inlet pressure must be between min. 0 barg
( 0 psig) and max. 6 barg (87 psig). The use of the pump outside this range can damage the pump.
Short term inlet pressure peaks must not exceed
20 barg (290 psig). It is recommended that the normal boost pressure is 2-6 barg (29-87 psig)
(3-7 barg [43.5-101.5 psig] abs).
If it is unknown what the peak inlet pressure can be, then there should be a 15 barg (218 psig) safety relief valve on the inlet side of the pump.
Max. pressure on the pump’s outlet line should be limited at 160 barg (2320 psig) continuously.
Short-term pressure peaks (e.g. in connection with closing of a valve) of up to 200 barg
(2900 psig) are acceptable.
It is recommended to have a check valve on the outlet side of the pump to protect the pump from high pressure going backwards into the pump when it is turned off. Especially, when using flexible hose or more pumps are installed in the same system.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
41
Instruction
6. Service
42
Pump instruction PAHT G 20-32 and PAHT G 50-90
5.4 Dry running
When running, the pump must always be connected to the water supply in order to avoid damage if it should run dry.
In systems with water tank it is recommended to build in a level gauge in the tank to avoid the risk of running dry.
In systems with a boost pump, it is strongly recommended to have a low pressure switch mounted on the water inlet side set at minimum
2 barg (29 psig).
4. through the pressure relief valve or the bypass valve.
Empty the tank of the anti-freeze medium.
Empty the pump through the lower bleeding plug.
The pump is now protected against internal corrosion and frost.
5.5 Disconnection
If the inlet line is disconnected from the water supply, the pump will be emptied of water through the disconnected inlet line. When starting up again, follow the bleeding procedure described under section 4: Initial start up.
5.6 Storage
When preparing the pump for long-term storage or for temperatures below the freezing point, flush the pump with an anti-freeze medium type monopropylene glycol to prevent internal corrosion or frost in the pump. If DI water with conductivity level below 20 µS/cm is used, you can drain the pump without adding any other media. Just make sure that all fluid is drained.
For further information on anti-freeze media, please contact the Danfoss High Pressure Pumps sales organization.
Recommended procedure:
5.6.1 Water hydraulic systems, water recirculated
1. Disconnect the power pack from the system.
2. Empty the tank of water. Fill up the tank with anti-freeze medium to a level well above the suction line.
3. Start up the power pack and, for a couple of minutes, in a closed loop system let the anti-freeze medium run back to tank
5.6.2 Open-ended systems with water supply from tank.
1. Empty the tank of water and empty the pump housing through the lower bleeding plug. When the pump is empty, retighten the plug.
2. Through the upper bleeding plug, fill the pump housing with anti-freeze medium.
Pour anti-freeze medium into the tank.
Connect a hose to the outlet of the pump and lead the other end of the hose back to tank.
3. Quickly start and stop the pump. Make sure that the pump does not run dry.
The pump is now protected against internal corrosion and frost.
5.6.3 Open-ended systems with direct water
1.
2.
3. supply.
Disconnect the water supply to the pump.
Through the lower bleeding plug, empty the pump housing of water and close it again.
Connect the pump to a tank of eg. 25 litre
(6 gal.) of anti-freeze additive. Connect a hose to the inlet port of the pump and via another hose return the flow from the outlet port port to the tank with anti-freeze additives.
4. Quickly start and stop the pump. Make sure that the pump does not run dry.
The pump is now protected against internal corrosion and frost.
The Danfoss PAHT G pumps are designed for long periods of service-free operation to provide customers with low maintenance and life cycle costs. Provided that the pumps are installed and operated according to Danfoss specifications, the
Danfoss PAHT G pumps typically run up to 8,000 hours between service routines. However, the service schedule for your PAHT G pump may vary according to the application and other factors.
Other factors that affect pump performance and lifetime include:
•
•
•
•
running the pump at speeds outside specifications
supplying the pump with water at temperatures higher than recommended
running the pump at inlet pressures outside specifications
running the pump at outlet pressures outside the specifications.
The life of a pump may be greatly shortened if
Danfoss recommendations concerning system design and operation are not followed.
In our experience, poor filtration is the number one cause of pump damage.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Instruction Pump instruction PAHT G 20-32 and PAHT G 50-90
7. Recommended service intervals
7.1 General information
This guideline provides information on the recommended service intervals for the PAHT/
PAHT G pumps. The recommendation is based upon good engineering practice and on experience gained from operation even under extreme conditions.
The recommendation is for guidance only.
•
•
•
•
•
Pistons
Retainer plate, ball and bearing
Valve plate
Port plate
Sealings
If there are any wear marks on the parts they need to be replaced.
If service inspection due to the application is complicated, the plant operator can decide to extend the service interval by evaluating the following deviations:
•
•
Sound - does the pump have any unusual sounds?
Electric motor power consumption and speed compared with measurement made in the past.
Pressure/flow according to measurements made in the past?
7.2 Inspection of pump parts
Danfoss recommends to inspect the pumps after
8,000 hours. Typical signs of wear are seen on the contact/sliding surfaces in the pumps. If the pumps must run for additional 8,000 hours, the following parts will have to be inspected:
•
We advise that the above mentioned parameter during the extended service interval is inspected for every 500-2,000 hours beyond therecommended service intervals. The pump must in any case be inspected after maximum 16,000 hours or 2 years.
7.3 How to inspect the pump
Service manuals are available on the internet hpp.danfoss.com
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
43
Danfoss A/S
High Pressure Pumps
DK-6430 Nordborg
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 eady agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
© Danfoss | DCS (im) | 2020.08
180R9381 | AN077186502937en-000401
Electric Motors
Motor Manual
hoyermotors.com
M a n u a l
46
Motor
Manual
General
This manual concerns the following types of standard induction motors from Hoyer:
HMA3, HMC3, HMA2, HMC2, HMD, HMT, MS, Y2E1, Y2E2, YDT
These motors are manufactured in accordance with IEC/EN
60034-4 and IEC/EN 60072.
Motors are rated for the ambient temperature range -20°C to
+40°C and site altitudes ≤ 1000 m above sea level.
Low-voltage motors are components for installation in machinery. They are CE marked according to the Low Voltage
Directive 2014/35/EU.
Motors not fulfilling the IE3 efficiency level must be equipped with a variable speed drive when used in EU.
etc.) using suitable tools, never hit the drive components with a hammer as this will cause damage to the bearing.
The motor are balancing with half key, ensure that the drive components are also the same.
Correct alignment is essential to avoid bearing, vibration and shaft failure.
Use appropriate methods for alignment.
Re-check the alignment after the final tightening of the bolts or studs.
Check that drain holes and plugs face downwards. We recommend opening the drain hole for motors placed outdoors and not running 24 hours / day, so that the motor can breathe, thus ensuring a dry motor.
Transport and storage
Check the motor for external damage immediately upon receipt and, if found, inform the forwarding agent right away.
Check all rating plate data, and compare it with the requirement of the motor.
Turn the shaft by hand to check free rotation, remove transport locking if used.
Transport locking must be used again for internal transport also. It is also important that transport locking is used when motors are transported mounted on equipment.
All motors should be stored indoors, in dry, vibration- and dust-free conditions.
Electrical connection
Work is only permitted to be carried out by qualified specialists and must to be carried out in accordance with local regulations.
Before work commences, ensure that all power is switched off and cannot be switched on again. This also applies to the auxiliary power circuits, e.g. anti-condense heaters.
Check that supply voltage and frequency are the same as rated data.
Motors can be used with a supply deviation of ± 5% voltage and ± 2% frequency, according to IEC60034-1.
Connection diagrams for main supply and accessory as PTC or heater are located inside the terminal box.
Lifting eyebolts must be tightened before use. Damaged eyebolts must not be used, check before use. Lifting eyes at motor must not be used to lift the motor when it is attached to other equipment.
Connections must be made in such a way as to ensure that a permanently safe electrical connection is maintained, both for the main supply and the earth connection.
We recommend that crimped connections are made in accordance with IEC 60352-2.
Before commissioning, measure the insulation impedance. If values are ≤ 10M Ω at 25°C, the winding must be oven dried.
The insulation resistance reference is halved for each 20°C rise in motor temperature.
It is recommended that shafts are rotated periodically by hand to prevent grease migration.
Tightening torques for terminal board screws:
Thread M5
T.(Nm) 2.5
M6
3.5
M8 M10 M12 M16 M20 M24
7 12 18 35 55 80
Installation
The motor must be fixed on a stable, clear and flat foundation.
It must be sufficiently rigid to withstand possible short circuit forces.
It is important to ensure that the mounting conditions do not cause resonance with the rotational frequency and the doubled supply frequency.
Only mount or remove drive components (pulley, coupling,
Ensure that the terminal box is clean and dry.
Unused glands must be closed with blind caps.
Check the terminal box gasket before it is remounted.
Maintenance
Inspect the motor at regular intervals, keep it clean and ensure free ventilation air flow, check the condition of shaft seals and replace if necessary. Both electrical and mechanical
2
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Motor
Manual
connections must be checked and tightened if necessary.
Bearing size and type are specified on the rating plate. Motor types HMA3 and HMC3 is as standard with lifetime greased bearings in motors size ≤ 180 for cast iron and size ≤ 132 for aluminium. Motor types HMA2 and HMC2 is as standard with lifetime greased bearing in motors size ≤ 225.
Motor types MS and Y2E is as standard with lifetime greased bearing in motors size ≤ 160.
The table values are based on an ambient temperature of
25°C. The values must be halved for every 15K increase in bearing temperature.
Higher speed operations, e.g. frequency converter drive will require shorter greasing intervals. Typically, doubling the speed will reduce the values by 50%.
Special note for Atex Zone 22 and nA motors
Designation of motor according to IEC standard:
II 3D Ex tc IIIB T120°C
II 3G Ex nA IIC T3
Typical duty hours for lifetime lubricated bearings.
Frame size
56 - 160
180
200
225
180 - 225
Poles
2 - 8
2
2
2
4 - 8
Typical lifetime
40,000h
35,000h
27,000h
23,000h
40,000h
The hazardous 3-phase asynchronous motors are in accordance with International standard IEC 60079-31 and
IEC 60079-15.
Only one electrical installation may be installed in one specified area (zone).
Motors with a re-greasing system must be lubricated with high quality lithium complex grease, NLGI grade 2 or 3, with a temperature range of between -40°C to +150°C.
Motors are normal fitted with a data plate with greasing information; if it is missing use the following re-greasing intervals.
Only certificated cable glands may be used. Unused glands must be closed.
Connections must be made in such a way as to ensure that a permanently safe electrical connection is maintained, both for the main supply and earth connection.
Installations must be in accordance with actual standards for installation in hazardours area.
Frame size
160
180
200
225
250
280
315
355
400
Grease
(g)
20
20
25
25
35
35
50
60
80
2 pole
(h)
4200
4200
3100
3100
2000
2000
1500
1000
800
4 pole
(h)
7000
7000
6500
6500
6000
6000
5500
4000
3000
6 pole
(h)
8500
8500
8500
8500
7000
7000
6500
5000
4000
8 pole
(h)
8500
8500
8500
8500
7000
7000
6500
6000
6000
It is recommended that the IEC standard is followed according to temperature and dust on the motor surface.
The use of motors with so much surface dust that the motor temperature increases is not permitted.
Regularly cleaning is recommended.
The radial shaft sealing ring is part of the ATEX certification.
It is important that the ring is always intact.
The shaft sealing must be regularly checked, and if dry it must be lubricated. It is recommended that the seal is relubricated regularly.
Always use the original seal ring when replaced.
Replacing bearings also means replacing the seals.
Grease the motor while running, open the grease outlet plug and let the motor run 1-2 hours before the outlet grease plug is closed again.
Grease the motor for the first time during commissioning.
All machines must be inspected regularly for mechanical damage.
The user is responsible for changing parts in accordance with the lifetime of parts, in particular: bearings, grease and lubrication of shaft sealing.
The following applies in general for both lifetime lubricated and re-lubricated bearings:
At 60Hz the time will be reduced by app. 20%.
Data for vertically mounted motors are half of the above values.
Maintenance, repairs and replacement on this type must only be carried out by qualified specialists.
3
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
47
Connection diagram
Anschlußdiagram
Anslutningdiagramm
Forbindelsesdiagram
Aansluitdiagram
Connection
Conexión
Collegamento
Schemat polacsen
48 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
49
50
Head Offices
Denmark
Over Hadstenvej 42 · DK-8370 Hadsten
T +45 86 98 21 11 · F +45 86 98 17 79
CVR no. 17 63 06 95 [email protected]
hoyermotors.com
China
19 Jingwu Middle Road · Beilun District
Ningbo 315821 · Zhejiang
T +86 574 26 28 15 77 · F + 86 574 2628 1573 [email protected]
hoyermotors.cn
Hoyer Motors, Motor Manual, April 2019
Branch Offices
Germany
Landsberger Straße 155 · 80687 München
T +49 89 700 88 235 · F +49 89 543 56 333 [email protected]
hoyermotors.com
Sweden
Liljeholmsstranden 5 · PO box 44017
SE-100 73 Stockholm
T +46 8 446 877 13 [email protected]
hoyermotors.com
Benelux
Vasteland 78 · 3011 BN, Rotterdam
Tel. +31 10 420 35 20 · Fax.+31 10 420 44 51 [email protected]
hoyermotors.com
Korea
302ho · Code square · 3150-1 · Daejeo 2-dong
Gangseo-gu · Busan · Korea
T +82 51 996 0251 · F +82 51 996 0252 [email protected]
hoyermotors.com
Important notice.
Text and data in this catalogue are not binding and we reserve the right to implement changes without further notice.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Parts list
Parts list
PAHT 2-308 pumps
PAHT G 2-308 pumps
PAHT G 20/25/32 - PAHT G 50/63/70/80/90 -
PAHT G 256/308
Parts list | PAHT G pumps
Table of Contents
12.
13.
17.
Contents
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
10.
11.
Spare parts list for PAHT G 20-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Exploded view for PAHT G 20-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Spare parts list for PAHT G 50-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Exploded view forPAHT G 50-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Tool set for PAHT G 256-308 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
52 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Parts list | PAHT G pumps
1. General This parts list provides an overview of the content of the various service sets as well as exploded views for both non ATEX and
ATEX certified pumps.
ATEX certified pumps are indicated by Ex in the designation.
Non Atex
PAHT G 20
PAHT G 25
PAHT G 32
PAHT G 50
PAHT G 63
PAHT G 70
PAHT G 80
PAHT G 90
ATEX
PAHT G 20 Ex
PAHT G 25 Ex
PAHT G 32 Ex
PAHT G 50 Ex
PAHT G 63 Ex
PAHT G 70 Ex
PAHT G 80 Ex
PAHT G 90 Ex
In the following the pumps will be called
PAHT G.
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
53
Parts list | PAHT G pumps
10. Spare parts list for
PAHT G 20-32
122
123
124
125
126
127
128
67
91
92
93
94
121
61
62
63
64
65
66
32
34
11
31
7
9
Pos.
Qnt.
Designation
1 Shaft bush, torpedo
-
1 Press tool 1
1 Press tool 1
1
2
5
1 Housing
2 Pin Ø4 x 14
10 Screw M8 x 16
1 Plug
1 O-ring Ø102 x 3
1 End cover CW
1 Swash plate
1 Screw Ø8 x 16
2 Pin Ø4 x 14
1 Cylinder barrel
1 Spring
1 Retainer
1 Retainer ball
1 Retainer plate
9 Piston
1 Key 8 x 7 x 32
1 Port plate
1 Valve plate
9 Back up ring
9 O-ring Ø13 x 2
1 Port flange
1 O-ring Ø102 x 3
1 O-ring Ø59,5 x 3
1 Shaft sealing
1 End cover
1 Pin Ø5 x 10
6 Screw M8 x 60
4 Screw M8 x 50
1 Service instruction
54
Material
AISI 316
AISI 304
AISI 304
AISI 304
NBR
AISI 316
AISI 431
AISI 304
AISI 304
AISI 431
AISI 304
PEEK
AISI 304
1.4301
AISI 431 / PEEK
AISI 316Ti
AISI 304 / PEEK
AISI 431
PTFE
NBR
AISI 316
NBR
NBR
AISI 304 / NBR
AISI 316
AISI 304
AISI 304
AISI 304
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
Parts list | PAHT G pumps
11. Exploded view for
PAHT G 20-32
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
55
Parts list | PAHT G pumps
12. Spare parts list for
PAHT G 50-90
56
121
122
123
124
125
126
127
128
70
71
91
92
93
94
61
62
64
65
66
67
9
11
31
32
34
1
2
3
5
Pos.
Qnt. Designation
1 Shaft bush, torpedo
-
1 Press tool 1
1 Press tool 2
1 Housing
2 Pin ø4 x 14
1 Plug
10 Screw M8 x 16
1 O-ring ø135 x 3
1 End cover CW
1 Swash plate
1 Screw M8 x 20
2 Pin ø4 x 14
1 Cylinder barrel
1 Spring
1 Retainer ball
1 Retainer plate
9 Piston
1 Key 8 x 7 x 32
1 Washer
1 Retainer
1 Port plate
1 Valve plate
9 Back up ring
9 O-ring ø18,3 x 2,4
1 Port flange
1 O-ring ø135 x 3
1 O-ring Ø65 x 5
1 Shaft sealing
1 End cover
1 Pin ø6 x 10
6 Screw M8 x 70
4 Screw M8 x 55
1 Service instruction
Material
AISI 316
AISI 304
AISI 304
AISI 304
NBR
AISI 316
AISI 431
AISI 304
AISI 304
AISI 431
1.4462
AISI 431
AISI 304
AISI 431 / PEEK
AISI 316Ti
Polypropylen
AISI 304 / PEEK
AISI 304 / PEEK
AISI 431
PTFE
NBR
AISI 316
NBR
NBR
AISI 304 / NBR
AISI 316
AISI 304
AISI 304
AISI 304 x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Parts list | PAHT G pumps
13. Exploded view for
PAHT G 50-90
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
57
17. Tool set for
PAHT G 256-308
Designation
Allen key, 6 mm
Adjustable pin wrench
Combination wrench, 10 mm
Combination wrench, 13 mm
Nut, M8 x 6.5 x 13
Guide bolt, M8 x 140
Shaft seal extractor, Ø45
Press bush, Ø45
Eye bolt, M8
Press bush for valve plate
Stop for retainer plate
Screw, M8 x 20
Screw, M8 x 70 x x x x x x x x x x x x x
58 | © Danfoss | DCS (im) | 2021.05
AX319828953697en-000601
Guide line.
Guideline
Trouble shooting guide for
PAH / PAHT / PAHT C / PAHT G /
PAHT 674 and PAH F pumps
Guideline
Table of Contents
Validity
Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
3.
4.
5.
6.
6.1
6.2
6.3
1.
2.
Table of Contents
Trouble shooting fish bone chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
No flow/no pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Reduced flow/reduced pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
High torque on electric motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Noise from pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Noise from installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Typical signs of wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Valve plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Port plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Swash plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
This document is covering the pumps PAH, PAHT
PAHT C, PAHT G for both non ATEX and ATEX certified. PAHT pumps are not ATEX certified.
60 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Guideline
Trouble shooting fish bone chart
Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
61
Guideline Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
1. No flow/no pressure
Cause
1.1 Dry running
(no water supply to the pump)
1.2 Pump reversing
(electric motor is running the wrong direction, i.e. counter-clockwise)
Remedy
If no water comes out of the pump:
1.1.1 Check that inlet valve is open.
1.1.2 Check that booster pump is running.
1.2.1 Change the phase on the electric motor to make it run clockwise.
Comments
Mount a low pressure switch in front of the pump and check its set point/ function. The low pressure switch ensures that the pump does not start until the inlet pressure has reachedminimum inlet pressure (see Data sheet).
Rotation direction for the pump is shown by an arrow on the label on the pump.
WARNING:
- The pump must not run without water for more than a few seconds.
- If the pump takes in water from the high- pressure outlet line, it builds up pressure in pump housing and will eventually break down.
1.3 No rotation of electric motor
1.4 No rotation of pump
1.5 Axial load on pump shaft
(may cause high internal leakage)
Only applying to
PAH 2-12.5
PAHT 2-308
PAH F 20-40
PAHT C 2-308
PAHT G 2-308
1.3.1 Check that main switch is switched on.
1.3.2 Check the electricity at the facility.
1.3.3 Ensure that motor relay is switched on.
1.3.4 Ensure that fuse is not blown.
1.3.5 Ensure that booster pump is started.
1.3.6 Check that the monitor switches are working correctly.
1.3.7 Disconnect pump from electric motor and check that the motor is capable of running with no load.
1.4.1 Ensure that coupling between electric motor and pump is connected.
1.4.2 Check if coupling is damaged.
1.4.3 Check that electric motor is sized correctly.
1.4.4 Check that the electrical installation is correctly sized.
1.4.5 Contact Danfoss Sales office for guidelines in how to troubleshoot internal pump parts.
1.5.1 Ensure that the air gap between the two coupling parts is min 5 mm. It should always be possible to move the plastic part on the coupling at least 3 mm.
If motor-type relay or the electrical fuse is blown, check that electric motor is sized correctly.
To ensure easy mounting of the flexible coupling without using tools, the tolerances must be dimensioned accordingly.
WARNING:
Any axial and/or radial loads on the shaft must be avoided. Any axial or radial load will cause breakdown.
A - Bell housing
B - Flexible coupling
C - Motor shaft
1.6 Pump damage
(the internal parts may be damaged)
1.6.1 Contact Danfoss sales office for guidelines in how to troubleshoot internal pump parts.
A B
Instructions on internal elements are available on www.danfoss.high-pressurepumps.com
C
62 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Guideline
2.2 Low inlet pressure
2.3 Rotation speed (rpm)
Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
2. Reduced flow/reduced pressure
Cause
2.1 Wear on pump
Large internal leakage due to:
Remedy
2.1.1 Dismantle the pump.
2.1.2 Check valve plate.
Valve plate has marks/scratches on the surface facing the port plate. Minor wear on valve plate can cause large internal leakage. See Index 6.1.
2.1.3 Check port plate.
Port plate has marks/scratches on the surface facing the valve plate. Minor wear on port plate can cause large internal leakage. See Index 6.2.
2.1.4 Check cylinder barrel.
Liners in cylinder barrel may be scratched or worn. Insert a piston in the liner and check the fit. If there is any space (clearance) between liner and piston, liner or piston is worn.
2.1.5 Pre-treatment:
Analyse fluid for content of particles.
- Check that filters are OK and working
correctly.
2.1.6 Main filtration:
Check that the correct filter type is used
(particles in fluid must not exceed 10 μm).
Danfoss High Pressure Pumps supplies filters, please contact the sales office.
2.1.7 Fluid type:
The PAH/PAH F (tapwater) and PAHT/PAHT
G (ultra pure water) pumps are designed for water operation; for any other fluid, please contact Danfoss High Pressure
Pumps sales office for further help.
Comments
Typical signs of wear:
Polished surface all over the swash plate.
Normally, only half of the swash plate = the pressure side is polished. See index 6.3.
If the ring is missing, the piston is very worn.
The filters can be bypassed, even if they are correctly mounted. Some filters can create channelling where particles can pass through the filter in tunnels. String wounded filters are typically channelling filters. A string wound filter may have a filtration efficiency of only 50%, which will cause internal wear and must always be followed by a main filter .
Insufficient filtration means that too many or too large hard particles can pass the main filter because it is damaged, bypassed or simply too poor. Filtration efficiency must be 99.98%
(Beta = 5000) at 10 μm to prevent abnormal wear of the pump.
2.1.8 High fluid temperature:
If fluid temperature is above 50°C, stop the pump immediately.
- Check internal parts (see above).
2.2.1 Check that booster pump supplies the right pressure/flow.
2.2.2 Check if filters require replacement.
Temperature > 50° C will cause wear on internal pump parts. Mount a temperature switch and check its set point / function. The temperature switch will ensure that the pump stops at fluid temperatures > 50° C.
If the pressure drop across the filters is too high, the booster pump does not deliver sufficient flow/pressure. No pressure or low pressure results in cavitation and insufficient internal lubrication causing wear on internal pump parts.
Mount a low-pressure switch in front of the pump and check its set point/ function. The low- pressure switch ensures that the pump does not start until the inlet pressure has reached 1 bar.
2.3.1 If VFD-operated, check frequency.
2.3.2 Check that rotation speed of the electric motor is as stated on name plate on electric motor. Check that the motor rotor winding is not damaged.
Speeds below minimum limit (see Data sheet) result in insufficient internal lubrication causing wear on the internal pump parts.
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Guideline Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
3. High torque on electric motor
Cause
3.1 Too high outlet pressure from pump
3.2 Pump starts against pressure
3.3 Constant torque
3.4 Water pump damage
Remedy
3.1.1 Check for blocked nozzles or a faulty adjusted relief valve.
Comments
Pressure changes due to flow restrictions. This will also cause high motor torque.
3.2.1 Check that electric motor is correctly sized.
3.2.2 Check internal parts (see item 2.1).
3.2.3 Systems with more than one electric motor installed:
Start motors simultaneously.
Pumps run in parallel with cascade start, may switch off the motor relay due to too high torque caused by high outlet pressure.
3.3.1 Please contact Danfoss High Pressure
Pumps sales office.
3.4.1 Dismantle pump and check for wear.
If the electric motor is too small for the pump, it cannot provide sufficient torque.
Too heavy damage in the pump will increase friction causing a high torque (see item 6,
Typical signs of wear).
64 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Guideline
4. Noise from pump
Cause
4.1 Air in fluid
Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
4.2 Bleeding conditions of pump
4.3 Min/max nominal inlet pressure
4.4 Pump reversing
4.5 High rotation speed (rpm)
4.6 Outlet pressure
4.7 Soft start/stop
Remedy
4.1.1 Ensure that the entire inlet line is bled before starting up the system.
4.1.2 Ensure that air cannot enter into the inlet line.
4.2.1 Follow the instructions “Initial start-up” supplied with the new pump.
4.2.2 Ensure that the pump is completely bled before start-up.
4.3.1 Ensure that inlet pressure is within the limits specified in the Data sheet.
4.3.2 Check the pump for internal damage.
Comments
Small air bubbles will accumulate and create large bubbles causing internal cavitation and thus making the pump very noisy.
WARNING:
The pump can only run few minutes with air in the fluid without being damaged.
The pump and the inlet line must be completely bled before start-up, otherwise the pump will cavitate and make high noise.
WARNING:
The pump can only run few minutes with air in the fluid without being damaged.
Too high inlet pressure causes too high pressure inside the pump damaging the pistons and eventually the pump.
Inlet pressure below min. limit causes cavitation and insufficient internal lubrication resulting in wear on internal pump parts.
4.4.1 Dismantle pump and check if anything is broken or worn (See “1. No flow”, item 1.2
Pump reversing”).
WARNING:
The pump must not run without water for more than a few seconds. If the pump takes in water from the high-pressure outlet line, it builds up pressure and will eventually be damaged.
4.5.1 If electric motor rpm is too high, dismantle pump and check for damage.
4.5.2 If the rpm is within the specified range of the pump data sheet and abnormal noise remains, dismantle pump and check for damage.
Mount a low-pressure switch in front of the pump and check its set point/ function. The low-pressure switch will ensure that the pump does not start until the minimum inlet pressure has been reached.
If pump rotates in wrong direction, it will take in water from the high-pressure outlet line.
Pressure will be built up inside the pump and it will eventually be damaged.
Higher rpm than specified in the pump data sheet results in wear of the pistons, i.e. pistons may be damaged.
High rpm will also increase pressure pulsations from the pump, and the noise level will increase.
If rpm is changed, noise frequency will also change.
4.6.1 If outlet pressure is too low, check set point of outlet pressure valve.
4.6.2 If outlet pressure is lower than mentioned in the pump data sheet, please contact
Danfoss High Pressure Pumps technical support.
4.6.3 If outlet pressure has exceeded its maximum, check set point of outlet pressure valve.
4.6.4 Check internal parts for wear/damage.
4.7.1 Check if noise is normal when the pump is running at operation speed.
4.7.2 If noise is abnormal at operation speed, check internal parts (see above).
At too low outlet pressure, the pump will create higher pressure pulsations and thus make noise.
Too low pressure also causes insufficient internal lubrication and wear on internal parts. Pump may eventually be damaged.
Too high outlet pressure may damage the pump.
Noise frequency changes during soft start-up/ stop.
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65
Guideline Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
5. Noise from installation
Cause
5.1 Inlet/outlet connections (hoses/pipes)
5.2 Length/dimension of inlet/outlet line
5.3 Hose stiffness
5.4 Hoses/pipes mounted directly on frame
5.5 Vibration dampener under the electric motor
Remedy
5.1.1 Use flexible hoses at inlet/outlet connections.
5.1.2 Mount the connections to the frame by a vibration dampener mounting plate.
5.2.1 Increase pipe diameter and/or reduce the number of bends.
Comments
Non-flexible connections mounted directly on the frame will cause even small pressure pulsations from pump and create vibrations in the system/plant.
5.3.1 Use a more flexible hose.
5.4.1 Mount the connections to the frame by a vibration dampener mounting plate.
5.5.1 Mount a vibration dampener below the motor/pump.
Too small pipes or too many bends may create too fast flow/turbulence through the pipes and thus increase the noise level.
Too stiff hoses cannot dampen the small pressure pulsations from the pump, and subsequently vibrations occur in the system/ plant.
If the hoses are mounted directly on the frame, the small pressure pulsations from the pump can be transferred to the frame and the rest of the system/plant.
When no dampener is installed below the electric motor, vibrations from the motor and pump may be transferred to the frame and the rest of the system/plant.
66 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Picture 2
Scratches
Picture 3
Guideline
6. Typical signs of wear
Picture 1
Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
6.1 Valve plate
A normally worn valve plate has no marks/scratches but only a slightly
polished surface.
No scratches or marks should be felt. The surface must be flat and level.
A worn valve plate has scratches, and/or a polished surface. Even small scratches will give a loss of flow.
A good way to identify a worn valve plate is to hold a straight knife edge over the valve plate. When holding it up to the light, it will be possible to see any space between the knife edge and the valve plate. See picture 3.
If any light can be seen between the two arrows on the picture, the valve plate is worn.
If any scratches or marks can be felt by running a fingernail over the surface, the valve plate is worn.
The valve plate on picture 3 is highly damaged.
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67
Guideline
6.2 Port plate
Picture 1
Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
Scratc hes
If the port plate has scratches, level differences or both between the arrows, the port plate must be replaced.
Even small scratches or wear will cause loss of flow.
To check: See item 6.1, picture 3
Level d ifferenc g PEE
K tween
6.3 Swash plate
Picture 1 If the swash plate is polished 360°, it is an indication of insufficient filtration.
The surface of the swash plate must be plane and even at same level all over.
To check this, please see item 6.1, picture 3.
If the surface has any marks/scratches, it is worn/damaged and a new one is required.
Please contact Danfoss High Pressure Pumps sales office for further information.
68 180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
Guideline Trouble shooting guide for PAH, PAHT, PAHT C , PAHT G pumps
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022
69
Danfoss A/S
High Pressure Pump
Nordborgvej 81,
DK-6430 Nordborg
Denmark
© Danfoss | DCS (im) | 11.2019
521B1475 | DKCFN.PI.012.R2.02 | 70
MAKING MODERN LIVING POSSIBLE
Service guide.
Right and wrong
Trouble shooting guide for water hydraulic systems
hydraulic systems
Pump location 4.
Design
1.
Choice of material
.
.
.
Rubber
Plastic
Stainless steel
.
Iron
.
Copper
.
Brass
.
Aluminium
Always use system components made of corrosion proof materials
Non-corrosion proof materials may cause damage
2.
< 10 m m abs.
Choice of filter
> 10 m m
Pump always to be placed below water surface level
Pump location above water surface level will cause damage
5.
Suction conditions
6.
System to be dimensioned to provide a suction pressure of the pump inlet of max. 0.1 bar vacuum
Poor suction conditions will cause malfunction and damage the pump
Pressure Relief valve
3.
Install a 10 micron absolute filter with pressure switch
Return filter with bypass valve and poorer filterability than 10 damage the system m
will
Filter location 7.
Pressure relief valve to be mounted vertically or with vertical outlet and connected to return hose or tank
Coupling the pressure relief valve outlet directly to the pump inlet may damage the pump
Water supply
Locate the return filter in the return line immediately before the tank
Placing the return filter upstream of the final load may damage the pump
System to be filled via filter
Filling system with unfiltered water causes damage
Installation
8.
Impurities 11.
Assembly of coupling
Prior to installation, burrs and chips and other impurities must be removed from pipes and hoses, eg with a felt plug
Chips or other impurities in the system may cause damage
9.
Sealing
The coupling must be easy and simple to assemble (see product instruction)
Never use force when assembling the coupling parts, as this will damage the motor/pump
12.
Coupling
= min. 3 mm 0 mm
Fittings in screwed components to be sealed with O-rings or bonded seals
Using teflon tape or packing yarn in joints may cause damage
10.
Grease
Ensure always to have 3 mm distance between coupling flanges
Insufficient distance and/or misalignment between the coupling flanges will damage the pump
13.
Water supply
Correctly limited quantities of grease prevent seizing
Too much grease may develop biofilm causing operational failures
Fill system with water before starting to ensure lubrication and cooling
Starting without water will cause damage
Wiring
14.
Level indicator
Level and temperature indicators must be fitted. Follow installation instructions
Missing or incorrectly connected level and temperature indicators cause damage
15.
1 ?
2
Rotation direction
Check pump drive motor rotation direction matches that of the pump prior to installation
Incorrect rotation direction will damage the pump
16.
Bleeding
Starting procedure
Cleaning procedure
1. Fill cold water into the system via the return filter and
bleed the pump (Power Packs PPH 4 - 6.3 - 10 and 12.5 are
self-bleeding)
2. Start and bleed the system -without pressure by opening
the bypass valve
3. Add the cleaning agent to give 3% agent/water solution
4. Run the system for 60 min. and activate all components as
often as possible to ensure effective flushing with the
cleaning agent
5. Empty the system of the cleaning agent solution
Flushing procedure
6. Fill cold water through the return filter and bleed the
pump (Power Packs PPH 4 - 6.3 - 10 and 12.5 are
self-bleeding)
7. Run the system for 30 min. and activate all components as
often as possible
8. Empty the system of the water
9. Alternatively the system may be flushed by running the
unit without the return hose while continuously filling up
water. The flushing should continue until there is no trace
of cleaning agent in the return water
10. Change the return filter element, fill cold water through
the return filter and bleed the pump during start up
11. The system is now ready for operation
Starting procedure
Bleeding the pump will ensure correct cooling and lubrication
Insufficient bleeding may cause damage (not applicable to Power Packs)
60 min.
2-3 days
Observing the starting procedure will ensure problem-free operation
If the system is not cleaned before starting, the filter will clog
Trouble shooting
Open ended water systems
No water supply
No
.
Is water coming
out of the tap?
.
Are all taps open?
Yes
Yes
.
Is the control light
for “low pump suction
pressure” on?
.
The filter is clogging
No
.
Is water coming
through the filter?
Yes
No
.
Replace filter element
No
.
Is the water supply ok?
.
Is water supplied to the pump?
Yes
.
Is the electric motor of
the pump unit rotating?
No
Yes
.
Is the water in the tank
very hot? Ie above 50 o
Yes
No
.
Lower inlet
temperature or
provide better cooling
.
Is the power supply ok?
.
Are control lights on?
Yes
No
.
Is the filter clogged?
.
Is the filter control
light on?
Yes
.
Replace filter element
Contact serviceman
No
.
A blown fuse / or short
circuit?
. Check power supply
and fuses and contact
electrician
.
Turn on the tap for
water supply
Stamp
Trouble shooting
Closed water systems
The system does not work
.
Fill water into the system
.
Is the electric motor of
the pump unit rotating?
No
Yes
.
Is the water in the tank
very hot? Ie above 50 o
Yes
No
.
A blown fuse/or short
circuit?
.
Check power supply
and fuses and contact
electrician
No
.
Is the power supply ok?
.
Are control lights on?
Yes
.
Is the filter clogged?
.
Is the filter control
light on?
No
Contact serviceman
Yes
.
At temperatures
higher than 50 o the
pump drive cuts out.
Consequently the
cooler must be
checked/cleaned
.
Replace filter element
.
Trace leakage, if any
No
.
Is there sufficient water
in the tank?
Yes
Stamp
© Danfoss | DCS (im) | 2022.01
180R9378 | AQ146186503066en-000901 | IOM PAHT G 20-90 | 01.2022 | 80

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