Grundfos CRN-H MAGdrive Installation And Operating Instructions Manual Download Page 8 | Manualshive

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Eng

lish (US)

8

5.4 System layout

The system designer is ultimately responsible for the system
layout.

TM

06

88

81

03

17

Pos. Description

1

Baffle plate and vortex breaker

2

Vessel - oil drain

3

Inlet pipe

4

Isolation valve

5

Pressure gauge

6

Pipe elbow

7

Drain valve

8

Eccentric reducer

9

Pump

10

Heat tape

11

Motor

12

Base plate

13

Pressure sensors

14

Bypass and Vent adapter

15

Orifice

16

Isolation valve

17

Bypass and Vent pipe

18

Outlet pipe

19

Pressure gauge

20

Check valve

21

Pressure relief regulator

22

Isolation valve

Pos. Description

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Summary of Contents for CRN-H MAGdrive

Page 1: ...GRUNDFOS INSTRUCTIONS CRN H MAGdrive for Refrigerants 60 Hz North America Installation and operating instructions ...

Page 2: ...arranty claim and or a Return Material Authorization must be included if so instructed Grundfos will not be liable for any incidental or consequential damages losses or expenses arising from installation use or any other causes There are no express or implied warranties including merchantability or fitness for a particular purpose which extend beyond those warranties described or referred to above...

Page 3: ...similar systems WARNING The tasks of designing installing commissioning operating and servicing a refrigeration system may be individually covered by national and international rules and regulations Similar rules and regulations may exist for other types of systems using refrigerant pumps These rules and regulations must always be observed WARNING The pump must be connected to an external power su...

Page 4: ...ARNING Electrical work All electrical work must be performed by a qualified electrician in accordance with the latest edition of national state and local codes and regulations WARNING Shock Hazard A faulty motor or wiring can cause electrical shock that could be fatal whether touched directly or conducted through standing water For this reason proper grounding of the pump to the power supply s gro...

Page 5: ...operation Install the pump with easy access for inspection maintenance and service The chamber stack is removed from the pump sleeve as one unit back pull out When selecting the pump location and orientation ensure that there is enough space behind the pump to allow pump replacement In addition consider the following installation issues Use a drip tray for collection of water condensate from the p...

Page 6: ...ructions To assist in the proper location of the bolts a template can be formed The bolt locations must be double checked with drawings and base Bolt sleeves can be used to allow final positioning of the bolts The sleeves are a minimum of 3 times larger than the bolt and have a length of at least 10 times the diameter Figure 2 b shows the anchor bolt and the bolt sleeve in which it is installed Fi...

Page 7: ... tighten all bolts 5 Lower the pump completely onto the base plate and tighten all bolts to the proper torque see bolt table Fig 4 Grundfos base plate 5 3 Bolt torques Outdoor installation When installed outdoors we recommend that you provide the motor with a rain cover or other shelter Tightening torques The table below shows the recommended tightening torques for bolts in flanges TM04 4123 1211 ...

Page 8: ...Vessel oil drain 3 Inlet pipe 4 Isolation valve 5 Pressure gauge 6 Pipe elbow 7 Drain valve 8 Eccentric reducer 9 Pump 10 Heat tape 11 Motor 12 Base plate 13 Pressure sensors 14 Bypass and Vent adapter 15 Orifice 16 Isolation valve 17 Bypass and Vent pipe 18 Outlet pipe 19 Pressure gauge 20 Check valve 21 Pressure relief regulator 22 Isolation valve Pos Description ...

Page 9: ... must travel freely away from the pump and back to the reservoir Avoid designs that prevent back flow of vapor or can trap vapor The following issues must always be considered when designing the pipe system Possibility for sealing off the pump section for service and replacement Possibility for pump evacuation safe discharging and charging of refrigerant We recommend that you use the pump drain co...

Page 10: ...The inlet pipe is to be insulated along with the reservoir Drain valving assists in pump service The drain valves assist in evacuating system oil and refrigerant A inlet pressure gauge is valuable when analyzing proper pump performance 5 4 2 Outlet pipe Install a check valve downstream of the pump to prevent back flow and reverse rotation of the pump Install an isolation valve for service of pump ...

Page 11: ... 9 Motor protection Three phase motors CRN H MAGdrive pumps with three phase motors must be used with the proper size and type of motor protective circuit breaker to ensure the motor is protected against damage from low voltage phase failure current unbalance and overloads Use a properly sized circuit breaker with manual reset and ambient temperature compensated extra quick trip in all three phase...

Page 12: ...able is inadvertently pulled out of the cable entry Fig 8 Wiring diagram three phase mains connection Fig 9 Wiring diagram signal terminals Note Terminals 27 29 and 37 are not used TM03 8799 2507 Terminal Function 91 L1 Three phase supply 92 L2 93 L3 95 99 PE Ground connection 96 U Three phase motor connection 0 100 of mains voltage 97 V 98 W TM06 9910 0817 Terminal Type Function 12 24 V out Suppl...

Page 13: ...inal A54 set to I prior to power connection to CUE See power supply to CUE and motor above For further information see the separate installation and operating instructions supplied with the Grundfos CUE frequency converter 5 11 Self regulating heat tape Connect 1 60 120 power to the Danfoss self regulating heat tape TM03 9507 3207 TM03 8801 2607 Terminal Function C 1 C 2 Common NO 1 NO 2 Normally ...

Page 14: ...After programming CUE copy the settings to the Grundfos local control panel Test the pump protections section 6 2 Pump protection while operating on the bypass line before proceeding to step 6 6 Continue operating the pump and slowly open the pump outlet valve The outlet line will fill with liquid refrigerant The pumps are refrigerant lubricated and do not require any external lubrication or inspe...

Page 15: ...N H MAGdrive pump design TM06 8882 0317 Rotating flange design for easy bolt hole alignment The multistage hydraulics are designed for operation with refrigerants at conditions close to the boiling point The first stage has been oversized to reduce the required NPSH on two pole pump models Full motor program featuring premium efficiency Grundfos or Baldor motors By pass connection Modular design f...

Page 16: ... immediately if the motor current is too high In order to ensure the optimum protection of the MAGdrive motor the motor protection must be set in accordance with the following guidelines 1 Set the overload protection to the rated service factor current of the motor 7 1 5 High Low motor speeds protection When operating the pumps with variable speed using a frequency converter limit the minimum and ...

Page 17: ...ontrol to match the pump performance to the actual demand Differential pressure sensor connected to pump inlet and outlet No need for the loss generating Q MAX orifice Very reliable and robust Designed for use with R717 NH3 and selected HFCs in various types of commercial and industrial refrigeration systems 316 stainless steel pump casing Drain for removal of liquid refrigerant and or oil Low ser...

Page 18: ... Pump version A Basic version B Oversize motor E Certificate approval F CR pump for high temperatures air cooled top assembly H Horizontal version I Different pressure rating J Pump with different maximum speed K Pump with low NPSH M Magnetic drive N Fitted with sensor P Undersize motor T Oversize motor two flange sizes bigger X Special version Pipe connection inlet x outlet GA ANSI 1 5 x 1 GB ANS...

Page 19: ...re than six months of the year we recommend that you grease the motor when the pump is taken out of operation WARNING Switch off the power supply and lock the power supply in position OFF before starting maintenance work on the pump WARNING The system must be evacuated before dismantling the pump Before dismantling the pump close the stop valves on either side of the pump Do not close valves that ...

Page 20: ... program It must also be noted that pumps with more stages pumps running to the left of the performance curve and certain pump ranges may have higher thrust loads Pumps with high thrust loads must be greased according to the next service interval level 8 4 Motor lubrication schedule for motors with grease fittings New motors that have been stored for a year or more must be regreased The grease out...

Page 21: ...packed chamber stack kits Fig 14 Prepacked flange kits Grundfos offers an extensive list of spare parts for CR pumps For a current list of these parts see Grundfos All Product Spare Parts Service Kits Price List part number L SK SL 002 8 8 Contaminated products The product will be classified as contaminated if it has been used for a liquid which is injurious to health or toxic If you request Grund...

Page 22: ...much higher than anticipated a The outlet stop valve is closed b The pipe system to evaporators is blocked and the bypass does not open similar to no refrigeration demand 3 The pump cuts out due to low differential pressure The pump is operating but cuts out due to low differential pressure Restarting gives similar result a Setting for minimum differential pressure is too high for the system b The...

Page 23: ...es Minimize the number of pipe bends and use pipe bends that have a bending radius of more than 1 5 times the pipe diameter The number of other fittings for example for a change in diameter must be minimized Lower the liquid temperature to reduce the saturated vapor 10 1 2 NPSH curve chart The NPSH required NPSHr is defined as the NPSH at which the pump total head has decreased by 3 due to low suc...

Page 24: ... the pump is installed at an altitude exceeding the altitude values in the chart below the motor must not be fully loaded due to the risk of overheating Overheating may result from excessive ambient temperatures or the low density and consequently low cooling effect of the air at high altitudes In such cases it may be necessary to use a motor with a higher rated output P2 Fig 17 Relationship betwe...

Page 25: ...ble contact the nearest Grundfos company or service workshop Subject to alterations TEFC Premium Efficient Motors for CRN H MAGdrive Pumps 2 pole Hp Phase Frame Safety Factor Voltage Motor Efficiency Insulation Class Full Load Current Starting Current 5 3 184TC 1 15 208 230 460 88 5 F 12 11 8 5 9 57 2 7 5 3 213TCZ 1 15 208 230 460 89 5 F 19 4 18 9 68 4 10 3 213TCZ 1 15 208 230 460 91 F 24 8 23 8 1...

Page 26: ...26 ...

Page 27: ...7 3500 www grundfos us GRUNDFOS Canada 2941 Brighton Road Oakville Ontario L6H 6C9 Canada Phone 1 905 829 9533 Telefax 1 905 829 9512 www grundfos ca GRUNDFOS México Boulevard TLC No 15 Parque Industrial Stiva Aeropuerto C P 66600 Apodaca N L México Phone 011 52 81 8144 4000 Fax 011 52 81 8144 4010 www grundfos mx ...

Page 28: ...7 ECM 1216740 The name Grundfos the Grundfos logo and be think innovate are registered trademarks owned by Grundfos Holding A S or Grundfos A S Denmark All rights reserved worldwide Copyright Grundfos Holding A S www grundfos com ...

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