GRUNDFOS DATA BOOKLET - AMMONIA21 RC - Data Booklet... · 2019. 11. 5. · WinCAPS 38. 3 Introduction RC pumps General data Introduction This data booklet deals with Grundfos RC refrigerant

GRUNDFOS DATA BOOKLET

RC pumps50 Hz

Multistage, canned-motor, refrigerant pump

2

Contents

IntroductionGeneral data 3Introduction 3Applications 3Features and benefits 3

IdentificationType key 4Nameplate 5

Selection of productOrdering a pump 6

Performance rangePerformance range 7

Product rangeR744 (CO2) 8R717 (NH3) 10HFCs (R134a, R404A, R407C, R410A, R507A) 11

ConstructionMaterial specification 12

Product descriptionFeatures 15Operating conditions 16NPSH (Net Positive Suction Head) 17Maximum flow rate 18Minimum flow rate 18Minimum differential pressure 18Sound pressure level 18Speed control 18Liquid temperature 18Ambient temperature 18Wiring diagrams 18

Curve chartsHow to read the performance curves 19Curve conditions 20Performance tests 20

Performance curves andtechnical dataR744 (CO2) 21Performance curves, RC2 21R744 (CO2) 22Performance curves, RC5 22R744 (CO2) 23Performance curves, RC8 23R717 (NH3) 24Performance curves, RC2 24R717 (NH3) 25Performance curves, RC5 25R717 (NH3) 26Performance curves, RC8 26HFCs (R134a, R404A, R407C, R410A, R507A) 27Performance curves, RC2 27HFCs (R134a, R404A, R407C, R410A, R507A) 28Performance curves, RC5 28HFCs (R134a, R404A, R407C, R410A, R507A) 29Performance curves, RC8 29

DimensionsDimensional sketches 30Top-suction pump with flanges 30Dimensional sketches 31End-suction pump with flanges 31Dimensional sketches 32Top-suction pump for welding 32Dimensional sketches 33Service unit 33

Service partsService parts 34Service units 34Service kits 34

Accessories and service kitsAccessories 35Grundfos CUE, external frequency converters 36

Further product documentationWebCAPS 37WinCAPS 38

3

RC pumpsIntroduction

General data

IntroductionThis data booklet deals with Grundfos RC refrigerant pumps.

Fig. 1 Grundfos RC pump

The RC pumps are designed for operation with the most common refrigerants in modern refrigeration and air-conditioning systems.

ApplicationsThe RC pumps are designed for the following applications:

• liquid distribution (LD) to a network of liquid overfeed or direct expansion (DX) evaporators

• liquid pressure boosting (LPB) in the liquid line of refrigeration and air-conditioning systems

• general liquid transfer (LT) in refrigeration and air-conditioning systems and related systems with similar operating conditions.

The flow range of the RC pump series is 0.2 to 9 m3/h.

Pumped liquidsThe RC pumps are specifically designed for operation with a wide selection of refrigerants in both oil-free and oil-containing systems:

• R744 (carbon dioxide, CO2)• R717 (ammonia, NH3)• R134a, R404A, R407C, R410A, R507A.

Features and benefitsMain design characteristics of the RC pumps:

• barrel-type, semi-hermetic design• multistage centrifugal pump• canned-motor (no shaft seals)• smooth design in stainless steel (1.4301).The RC pumps are designed and optimised for use with R744 (carbon dioxide, CO2).

Main benefits of the RC pumps:

• Low energy consumption due to high pump energy efficiency and variable-speed capacity control (Qmax. orifice, permanent by-pass).

• Wide range for variable-speed capacity control (25 to 50 Hz).

• Easy to install and service due to low weight, compactness and the new service unit concept.

• Low requirements for NPSH due to hydraulic robustness to occasional vapour bubbles in inlet. A low value for required NPSH can often lead to a reduction in height of the system rack.

TM04

786

4 23

10

RC pumps

4

Identification

Type keyThe type key covers the entire range of Grundfos RC pumps.

Example RC 5 - 7 / 4 A - GM - I - C - / / / / - E Y - I - C - N - R 7 4 4 - J

Type rangeRC: Refrigerant Circulator

Rated flowValue stated in m3/h

Number of chambers

Number of impellers(left out if equal to number of chambers)

Pump versionA Basic version X Special version

Pipe connectionW For welding, top suctionF DIN flange, top suctionG ANSI flange, top suctionFM DIN flange, end suctionGM ANSI flange, end suctionX Special connection, also used for service unit

Metals in contact with pumped mediaI Pump sleeve EN 1.4301/304 AISI

Pump shaft EN 1.4301/304 AISIPump impellers/chambers EN 1.4301/304 AISI

Gaskets/seals (excl. neck ring)C Neoprene (chloroprene)

/ Not applicable/ Not applicable/ Not applicable/ Not applicable

Supply voltageFY 3 x 380-415 V, 50 HzFZ 3 x 220-240 V, 50 HzEY 3 x 440-480 V, 60 HzEZ 3 x 208-230 V, 60 HzX Special voltage

Motor informationI Integrated motor (IP66)

Mains plugC Cable without plug

SensorN No sensor

Pumped mediaR744 Carbon dioxide (CO2)R717 Ammonia (NH3)R22 ChlorodifluoromethaneRHFC Code for:

R134a: tetrafluoroethaneR404A: mixture of R125 (44 %), R143a (52 %) and R134a (4 %)R407C: mixture of R32 (23 %), R125 (25 %) and R134a (52 %)R410A: mixture of R32 (50 %) and R125 (50 %)R507A: mixture of R125 (50 %) and R143a (50 %)

X Undefined media, also used for service unit

System pressureH 25 barJ 40 barK 52 barX Special system pressure, also used for service unit

5

Identification RC pumps

NameplateThe nameplate shows the operating data applying to the pump.

Fig. 2 Nameplate, SI version (Système International)

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625

2 51

09

Pos. Description Pos. Description

1 Type designation 13 Product number of service unit

2 Product number of pump 14 Model

3 Serial number 15 Weight with cables

4 Production date (YYWW) 16 Rated flow rate

5 Frequency 17 Rated head

6 Rated voltage 18 Maximum head

7 Rated current 19 Refrigerant

8 Power factor 20 Minimum liquid temperature

9 Rated input power 21 Maximum liquid temperature

10 Maximum ambient temperature 22 Maximum system pressure

11 Insulation class 23 Maximum system pressure

12 Enclosure class

123456789

101112

14

151617181920212223

TYPENOSN

MODELMade in Denmark

fUI1/1Cos phiP1Tamb, maxINS. CLIP

HzVA

kW°C

QnomHnomHmaxRefrigerant

Tliquid , maxPS maxPS max

m³/hmm

°CbarMPa

PC

Tliquid, min °C

96889491

Weight kg

Barcode

13

RC pumps

6

Selection of product

Ordering a pumpWhen ordering a pump, you have to take the following aspects into consideration:

• refrigerant• maximum system pressure• inlet/outlet configuration• pipe connection type• rated flow• motor voltage.

When you have selected the pump type, you can identify the specific pump that best meets your requirements in sections Product range, pages 8 to 11, and Type key, page 4.

Accessories and service kitsDepending on installation type and pump variant, accessories and service kits may be required. See section Accessories and service kits, page 35, for selection of the correct accessories and service kits.

Note: Ordered accessories are not fitted from factory.

7

RC pumpsPerformance range

Performance rangeFigure 3 shows the performance range of the Grundfos RC pumps. It gives an overview of the various sizes.

Fig. 3 Performance range of RC pumps

TM04

7 43

8 20

10

RC pumps

8

Product range

R744 (CO2)

Pump type

Product number

Inlet/outlet configuration

and pipe connection

Rated voltage

Rated current

Rated flow

System pressure

Net weightComplete pump Product number

Service unit

Net weightService unit

[V] [A] [m3/h] [bar] [kg] [kg]

RC2-7

96933921 Top suction,DIN flange 3 x 380-415 2.1 2 40 27 96934029 24

96933939 Top suction, DIN flange 3 x 220-240 3.7 2 40 27 96934038 24

96933924 End suction, DIN flange 3 x 380-415 2.1 2 40 26 96934029 24

96933942 End suction, DIN flange 3 x 220-240 3.7 2 40 26 96934038 24

96933927 Top suction,welding 3 x 380-415 2.1 2 40 24 96934029 24




96933933 End suction,DIN flange 3 x 380-415 2.1 2 52 28 96934029 24




RC5-7













9

Product range RC pumps

RC8-7













Pump type

Product number


and pipe connection

Rated voltage

Rated current

Rated flow

System pressure

Net weightComplete pump Product number

Service unit

Net weightService unit

[V] [A] [m3/h] [bar] [kg] [kg]

10


R717 (NH3)

Pump type

Product number


and pipe connection

Rated voltage

Rated current

Rated flow

System pressure

Net weight Complete pump Product number

Service unit

Net weight Service unit

[V] [A] [m3/h] [bar] [kg] [kg]

RC2-10







RC5-10







RC8-10







11


HFCs (R134a, R404A, R407C, R410A, R507A)

Pump type

Product number


and pipe connection

Rated voltage

Rated current

Rated flow

System pressure

Net weight Complete pump Product number

Service unit

Net weight Service unit

[V] [A] [m3/h] [bar] [kg] [kg]

RC2-7/5







RC5-7/5







RC8-7/5







RC pumps

12

Construction

Material specificationThe position numbers in the table below refer to the sectional drawings and the exploded view on the following pages.

Pos. Description Material EN standard AISI/ASTM4a Intermediate chamber with seal ring Stainless steel 1.4301 3044d Intermediate chamber with holes Stainless steel 1.4301 30415 Inlet filter Stainless steel 1.4301 304

15a Motor flow filter Stainless steel 1.4301 30416 Pump sleeve Stainless steel 1.4301 304

16a Connection for differential pressure transmitter Stainless steel 1.4301 304

17 Plug Stainless steel 1.4301 30420 Drain Stainless steel 1.4301 30426 Hexagon socket head cap screw M8 x 40

37a O-ring Neoprene37b O-ring Neoprene47a Bearing ring Cemented tungsten carbide (C9M)48 Stator Steel/copper49 Impeller Stainless steel 1.4301 30451 Rotor Steel aluminium55 Motor housing Stainless steel 1.4301 30456 Sleeve-end pump feet Stainless steel 1.4301 304

56a Clamp Stainless steel 1.4301 304100 O-ring Neoprene122 Priming screw Stainless steel 1.4301 304132 Clamp ring Stainless steel 1.4301 304151 Cover for motor housing Stainless steel 1.4301 304

151b O-ring Neoprene153 Bearing Cemented tungsten carbide (C9M)154 Bearing Cemented tungsten carbide (C9M)

157a O-ring Neoprene177 Connection for power supply Stainless steel with glass sealing

177a Connection for thermal sensor Stainless steel with glass sealing190 Lifting bracket Stainless steel 1.4301 304191 Motor-end pump foot Stainless steel 1.4301 304203 Thrust bearing, stationary Silicon carbide (SiC)206 Thrust bearing, rotating Silicon carbide (SiC)661 Rotor can Stainless steel 1.4301 304

13

Construction RC pumps

Fig. 4 Sectional drawing of a Grundfos RC pump

Fig. 5 Sectional drawing of a Grundfos RC service unitTM

04 7

942

2510

TM04

794

3 25

10

14

Construction RC pumps

Fig. 6 Exploded view of a Grundfos RC pump

TM04

753

5 35

10

15

RC pumpsProduct description

FeaturesDesignThe barrel-type design is ideal for high-pressure applications since it has only one seal located between pump sleeve and motor housing. In addition, the weld-in version eliminates the need for counter flanges and makes the installation easier. The weld-in version also eliminates the risk of leaks in flanges. The canned-motor further prevents the escape of refrigerant.

The smooth design in stainless steel (1.4301) and the regular shape of the pump make it easy to insulate the pump, which is especially important for low-temperature applications. The motor housing of the pump must not be insulated for liquid temperatures above +20 °C.

The moveable feet allow installation on both horizontal and vertical surfaces. If the inlet and outlet pipes are sufficiently supported, the two sleeve-end pump feet can be removed. The pump must always be installed with horizontal orientation of the motor shaft.

Pipe systemThe inlet and outlet pipe system must be designed according to the special requirements for pipe transport of refrigerants (liquids at conditions close to the boiling point). Please observe the requirements for NPSH. Further recommendations for the design of the inlet and outlet pipe sections can be found in the installation and operating instructions for the RC pumps available on www.Grundfos.com (WebCAPS).

HydraulicsThe multistage hydraulics has been designed for operation with liquids at conditions close to the boiling point. The first chamber is oversized to occasionally accept a flow of liquid with a low content of vapour bubbles. In addition, all RC pumps incorporate an inducer to improve the performance under conditions where vapour bubbles are present.

A coarse filter is located in the inlet to the first chamber to prevent large burrs and scraps from entering the hydraulics.

BearingsThe bearing system consists of media-lubricated slide bearings. Both the stationary and rotating parts of the radial bearings are made of tungsten carbide. Both the stationary and rotating parts of the axial bearing are made of silicon carbide.

ConnectionsTwo different inlet/outlet configurations are available: top suction and end suction. Top suction is preferable as any vapour generated in the pump during standstill can easily escape from the pump through the inlet and backwards to the separator/receiver.

The weld-in versions of the RC pumps are designed for welding the inlet and outlet connections of the pump sleeve into the pipe system. During the welding process, the motor and chamber stack must be removed from the pump sleeve.

The flanged versions of the RC pumps have flanges according to EN 1092-1, Type 11.

Flange faces used:

• face D for pumps with a maximum system pressure of 40 bar g

• face H for pumps with a maximum system pressure of 52 bar g.

These flanges are often referred to as DIN flanges for refrigeration.

Connections for sensors The pump inlet and outlet incorporate connections for a differential pressure transmitter to be used for variable-speed capacity control or for monitoring of the performance.

The motor housing has a connection for a pressure transmitter for monitoring of the pressure in the stator housing. In case of a failure of the rotor can, refrigerant will escape into the stator housing. This situation can be detected by using a pressure transmitter to monitor the pressure in the stator housing.

All connections for sensors are plugged from factory.

Liquid drainThe pump sleeve has a drain for removal of liquid refrigerant and/or oil from the pump in case of service or fault finding. A drain valve can be fitted directly to the drain allowing control of the drain. The drain is plugged from factory.

Motor The RC pumps have a three-phase, canned, induction motor (no shaft seals).

The motor is cooled by an internal flow of the pumped refrigerant. The internal flow is filtered before entering the space between rotor and rotor can. Due to the characteristics of the internal motor cooling flow, there are limitations to the operating envelope for the RC pumps. For further information on these limitations, see section Operating conditions, page 16.

16

Product description RC pumps

The motor has a built-in thermistor (PTC) for protection of the windings. The thermistor (PTC) must be connected to an external control circuit. The overload relay LT3-SA00M from Schneider Electric (Grundfos part no. 91073300) is recommended.

Supply voltageThe motor is available in two versions for the following supply voltages:

• 3 x 380-415 V, 50 Hz• 3 x 220-240 V, 50 Hz.

Enclosure classIP66 according to IEC 60529.

Insulation classF (155 °C).

Frequency converter Frequency converter operation is allowed in the frequency range from 25 to 50 Hz supply.

Power supply cable

PTC temperature signal cable

As standard, the cables are 5 metres long. Other cable lengths are available.

Service and repairThe RC pumps are maintenance-free, i.e. no maintenance is required for RC pumps that are always operating within the accepted operating envelope.

Should it become necessary to inspect or replace the pump, the pump sleeve can remain connected to the pipe system. The motor and chamber stack are removed from the pump sleeve as one unit. The motor and chamber stack can be replaced by a new service unit. Service units can be repaired by selected Grundfos Service Centres.

Operating conditionsThe operating envelope of a refrigerant pump is generally limited by various factors related to the operation close to the boiling point of the refrigerant and the specific properties of the refrigerant.

Fig. 7 Operating envelope for refrigerant pumps

The individual limits are described in the table below.

For R744 (CO2), the limits Qmin. and Hmin. depend strongly on the liquid temperature.

Cable typeCable

diameter[mm]

Bending radius

Fixed Free

H07RN-F4G1 with external galvanised-steel screen 11 ± 0.5 60 85

Cable typeCable

diameter[mm]

Bending radius

Fixed Free

H07RN-F3G1 9 ± 0.5 50 70

TM04

689

3 11

10

Abbreviation Description

Qmin.

Minimum flow through the pump to keep the temperature of the inlet flow to the motor low (mixing of external and internal flows).If Qmin. is exceeded, the refrigerant flowing through the motor will start boiling, and the flow through the motor will be reduced.

Qmax.

Too high flow through the pump, leading to pressure drop in the inlet. If Qmax. is exceeded, the refrigerant flow in the inlet to the pump will start boiling, cavitation will occur, performance will drop, and the flow through the motor may be reduced.

nmax.

Too high speed for mechanical design. If nmax. is exceeded, vibrations will occur, wear of bearings will increase, and the power consumption of the motor will be too high.

nmin.Too low bearing surface speed. If nmin. is exceeded, the lubrication of bearings will be inadequate.

Hmin.

Too low differential pressure across the motor and consequently insufficient flow through the motor to absorb motor losses without boiling. If Hmin. is exceeded, the refrigerant flowing through the motor will start boiling, and the flow through the motor will be reduced.

P2max.Too high load on motor. For Grundfos RC pumps, this limit falls outside the envelope created by the other limits.

3000

Q

H

2700

2400

2100

1800

1500

nmax.

nmin.

P2max.

Qmax.

Hmin.Qmin.

17


Figure 8 shows an example of how these limits change with the temperature of the R744 (CO2).

Fig. 8 R744 (CO2)-specific operating limits for RC pumps

Figure 8 shows that, with the increase of the R744 (CO2) liquid inlet temperature, the Qmin. and Hmin. limits reduce the operating envelope. For liquid temperatures between the selected values, interpolation must be used to evaluate the exact temperature limit.

Example The operating condition (6 m3/h flow and 12 m head) is marked with a dot in fig. 8. This operating condition falls between the temperature limit curves for 15 °C and 10 °C, indicating that the maximum liquid temperature for this condition lies between 15 °C and 10 °C. With graphical interpolation the exact temperature limit can be found as 12 °C. When operating at this condition for flow and head, the liquid temperature must be lower than 12 °C.

For R744 (CO2), the saturation pressure at 12 °C is 46.3 bar g.For an RC pump with an upper limit for system pressure higher than 46.3 bar g (e.g. 52 bar g), the 12 °C will be the upper limit for liquid temperature at this operating point. For an RC pump with an upper limit for system pressure lower than 46.3 bar (e.g. 40 bar g), the upper limit for liquid temperature at this operating point will be the saturation temperature corresponding to the maximum system pressure, for example an upper limit of 40 bar g corresponds to a temperature limit of 6.5 °C.

NPSH (Net Positive Suction Head)The NPSH parameter is a measure of the difference between the actual pressure of a liquid and its saturated vapour pressure at the given temperature.

If the pressure in a hydraulic circuit drops below the vapour pressure of the circulating liquid, boiling will occur, typically at the pump inlet, resulting in vapour bubbles appearing in the flow. When the mixture of liquid and vapour bubbles enters the first pump impeller, the pressure will increase, and the bubbles will collapse, resulting in noise, vibrations and sometimes also damage to the impeller. The process of bubbles collapsing in a liquid is called cavitation.

For a specific pump, the NPSH value is a function of the liquid properties and the magnitude of the flow. Generally, the higher the flow, the higher the required NPSH.

In closed hydraulic circuits where a risk of cavitation is present, it is possible to reduce or prevent cavitation as follows:

• Shorten the pipe from the separator/receiver to the pump inlet, and hereby reduce friction losses.

• Increase the cross-section of the pipe from the separator/receiver to the pump inlet to reduce the velocity of the liquid, and hereby reduce friction losses.

• Minimise 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, should be minimised.

• Lower the liquid temperature to reduce the vapour pressure.

Figure 9 shows the required NPSH for the RC pumps.

Fig. 9 Required NPSH for RC pumps

TM04

798

3 26

10

TM04

782

7 23

10

End suctionTop suction

18


In addition to the value that can be read from fig. 9, the following safety margins must be applied.

R744 (CO2): Add 0.1 m.

R717 (NH3): Add 0.4 m.

HFCs: Add 0.1 m.

ExampleFor an RC5 in top-suction configuration operating with R744 (CO2) and a flow of 5.0 m3/h, a value for NPSH of 0.5 m can be read from fig. 9. For R744 (CO2), the safety margin is 0.1 m. The total required NPSH is then 0.5 m + 0.1 m = 0.6 m.

Maximum flow rateFor R744 (CO2), the maximum flow rate is 115 % of the rated flow. For R717 (NH3) and HFCs, the maximum flow rate is 110 % of the rated flow. However, please observe the increased requirement for NPSH for flows higher than the rated flow. Also observe the increased requirements for minimum head for R744 (CO2), depending on the liquid temperature. See section Performance curves/ technical data, pages 21 to 23.

Minimum flow rateGenerally, 10 % of the rated flow is accepted as minimum flow. However, please observe the increased requirements for minimum flow for R744 (CO2), depending on the liquid temperature. See fig. 8. Also observe the increased requirements for minimum head for R744 (CO2), depending on the liquid temperature.See section Performance curves/ technical data, pages 21 to 23.

Minimum differential pressureGenerally, 20 % of the closed-valve pressure at maximum speed is accepted as minimum head. However, please observe the increased requirements for minimum flow for R744 (CO2), depending on the liquid temperature. See section Performance curves/ technical data, pages 21 to 23.

Sound pressure levelThe sound pressure level of the RC pumps is lower than the limiting values stated in the EC Machinery Directive (2006/42/EC).

Speed controlFrequency converter operation is allowed in the frequency range from 25 to 50 Hz at 50 Hz supply.

Liquid temperatureMinimum liquid temperature is generally -55 °C. Maximum liquid temperature depends on the refrigerant saturation pressure. For maximum liquid temperature, see the table below the refrigerant-specific performance curve. Please note that for some RC pumps high liquid temperatures are generally possible, however, the maximum liquid pressure must never be compromised. Both minimum and maximum liquid temperatures are stated on the nameplate.

Insulation of the motor housing is not allowed for liquid temperatures above +20 °C.

Ambient temperatureDuring operation, the minimum ambient temperature is identical to the minimum liquid temperature.

The maximum ambient temperature during operation is generally +55 °C. During standstill, a maximum liquid temperature of +70 °C is allowed.

Wiring diagrams

Fig. 10 Wiring diagram, power supply cable

Fig. 11 Wiring diagram, thermal sensor

TM04

626

2 01

10TM

04 6

263

0110

3~Screened motor cable

U BrownPE Green/yellow

V BlackW Blue

L2L1

L3

Thermal sensor:PTC according to DIN 44082

Rubber cable

To amplifierRelay

BrownBlue

19

RC pumpsCurve charts

How to read the performance curvesThe curves on the following pages apply to all versions of the RC pumps.

Fig. 12 Performance curves

QH curvesThe QH curves represent pump performance at constant supply frequency. These curves have a thin and a thick section. The thick section represents approved operating conditions. The small thin section represents pump characteristics at operating conditions that are only allowed for very short periods.

Motor power consumption curvesThis curve represents the power consumption of the motor at 50 Hz supply (full speed). For pumps designed for operation with HFCs, the curve represents the power consumption of the motor when operating at 50 Hz supply (full speed) with R134a with a liquid temperature of -10 °C.

For operation with other HFCs, the power consumption must be calculated in Grundfos WebCAPS. Grundfos WebCAPS is a Web-based Computer Aided Product Selection program available on www.Grundfos.com.

Liquid temperature limitation curvesThe liquid temperature limitation curves are relevant for operation with R744 (CO2) only and are therefore only present on performance curves for pumps for this refrigerant. The curves represent an upper limit for the liquid inlet temperature. Operation in the area above a specific temperature limitation curve is only possible if the liquid inlet temperature is equal to or below the temperature of the specific temperature limitation curve. See example under operating conditions.

Page Pump curves, R744 (CO2) Page Pump curves, R717 (NH3) Page Pump curves, HFCs21 Performance curves, RC2 24 Performance curves, RC2 27 Performance curves, RC222 Performance curves, RC5 25 Performance curves, RC5 28 Performance curves, RC523 Performance curves, RC8 26 Performance curves, RC8 29 Performance curves, RC8

TM04

748

0 20

10

Pump typeQH curveTotal pump head H = Htotal

Curve for motor power consumption

Motor power consumption (P1)

Supply frequency

Temperature limitation curve

20

Curve charts RC pumps

Curve conditionsThe guidelines below apply to the curves on pages 21 to 29.

• Tolerances according to ISO 9906, Annex A• Then curves apply to the pumping of the relevant

refrigerant at a temperature of -10 °C. For pumps for HFCs, the refrigerant chosen is R134a as this has the highest density of the selected HFCs.

Calculation of total headThe total pump head consists of the height difference between the measuring points + the differential head + the dynamic head.

Htotal = Hgeo + Hstat + Hdyn

Performance testsThe requested duty point of every pump is tested according to ISO 9906, Annex A, and without certification.

Hgeo: Height difference between measuring points.

Hstat: Differential head across the pump.

Hdyn: Calculated values based on the velocity of the pumped liquid on the inlet and outlet sides of the pump.

21

RC pumpsPerformance curves andtechnical data

R744 (CO2)

Performance curves, RC2

1) Only 52 bar systems.

TM04

748

0 20

10

Voltage [V] P1 [kW] I1/1 [A] Cos Enclosure class Insulation classMax. liquid

temperature [°C]

3 x 220-240 1.1 3.7 0.78 - 0.74 IP66 F 6 (161)

3 x 380-415 1.1 2.1 0.78 - 0.74 IP66 F 6 (161)

22

Performance curves/ technical data

RC pumps

R744 (CO2)



TM04

747

7 20

10


temperature [°C]

3 x 220-240 1.1 3.7 0.78 - 0.74 IP66 F 6 (161)

3 x 380-415 1.1 2.1 0.78 - 0.74 IP66 F 6 (161)

23


RC pumps

R744 (CO2)



TM04

747

4 20

10


temperature [°C]

3 x 220-240 1.85 6.6 0.76 - 0.69 IP66 F 6 (161)

3 x 380-415 1.85 3.8 0.76 - 0.69 IP66 F 6 (161)

24


RC pumps

R717 (NH3)


TM04

748

2 20

10


temperature [°C]

3 x 220-240 1.1 3.7 0.78 - 0.74 IP66 F 40

3 x 380-415 1.1 2.1 0.78 - 0.74 IP66 F 40

25


RC pumps

R717 (NH3)


TM04

747

9 20

10


temperature [°C]

3 x 220-240 1.1 3.7 0.78 - 0.74 IP66 F 40

3 x 380-415 1.1 2.1 0.78 - 0.74 IP66 F 40

26


RC pumps

R717 (NH3)


TM04

747

6 20

10


temperature [°C]

3 x 220-240 1.85 6.6 0.76 - 0.69 IP66 F 40

3 x 380-415 1.85 3.8 0.76 - 0.69 IP66 F 40

27


RC pumps

HFCs (R134a, R404A, R407C, R410A, R507A)


The shown P1 curve applies to the HFC refrigerant with the highest density (R134a).

TM04

748

1 20

10


temperature [°C]

3 x 220-240 1.1 3.7 0.78 - 0.74 IP66 F 40

3 x 380-415 1.1 2.1 0.78 - 0.74 IP66 F 40

28


RC pumps

HFCs (R134a, R404A, R407C, R410A, R507A)



TM04

747

8 20

10


temperature [°C]

3 x 220-240 1.1 3.7 0.78 - 0.74 IP66 F 40

3 x 380-415 1.1 2.1 0.78 - 0.74 IP66 F 40

29


RC pumps

HFCs (R134a, R404A, R407C, R410A, R507A)



TM04

747

5 20

10


temperature [°C]

3 x 220-240 1.85 6.6 0.76 - 0.69 IP66 F 40

3 x 380-415 1.85 3.8 0.76 - 0.69 IP66 F 40

RC pumps

30

Dimensions

Dimensional sketches

Top-suction pump with flanges

* For inlet flanges with diameter > 150, the dimensions L and L1 are increased with flange diameter/2-76 mm.This is done since the dimension L must indicate the maximum total length of the product (box dimension).

TM04

802

6 27

10

Dimension [mm] RC2-7 RC2-10 RC5-7 RC5-10 RC8-7 RC8-10System pressure [bar] 25/40 52 25/40 25/40 52 25/40 25/40 52 25/40A 150 150 150 180 180 180 242 242 242B 76 76 76 76 76 76 76 76 76C 130 130 130 130 130 130 130 130 130D 12 12 12 12 12 12 12 12 12E1 70 70 70 70 70 70 70 70 70E2 120 120 180 145 145 180 250 250 350E3 327 327 330 323 323 351 337 337 363E4 174 174 174 174 174 174 174 174 174E5 100 100 100 100 100 100 100 100 100H 240 240 240 240 240 240 240 240 240H1 110 110 110 110 110 110 110 110 110H2 130 130 130 130 130 130 130 130 130L (incl. cable) 736 736 799 757 766* 820 883* 890* 1009*L1 606 606 669 627 636* 690 753* 760* 879*LS (service space) 220 220 280 240 240 300 360 360 485W 201 201 201 201 201 201 201 201 201DN in 25 25 25 40 40 40 50 50 50DN out 20 20 20 32 32 32 40 40 40PN [bar] 25/40 63 25/40 25/40 63 25/40 25/40 63 25/40Face groove D H D D H D D H D

31

Dimensions RC pumps


End-suction pump with flanges

TM04

802

7 27

10

Dimension [mm] RC2-7 RC2-10 RC5-7 RC5-10 RC8-7 RC8-10System pressure [bar] 25/40 52 25/40 25/40 52 25/40 25/40 52 25/40A 140 140 140 176 176 176 217 217 217C 130 130 130 130 130 130 130 130 130D 12 12 12 12 12 12 12 12 12E1 115 165 115 118 140 118 121 140 121E2 120 85 180 145 145 180 250 250 350E3 325 327 328 323 323 351 337 337 363E4 174 174 174 174 174 174 174 174 174E5 100 100 100 100 100 100 100 100 100H 230 240 230 240 240 240 240 240 240H1 110 110 110 110 110 110 110 110 110H2 120 130 120 130 130 130 130 130 130L (incl. cable) 703 720 766 729 751 792 851 870 977L1 573 590 636 599 621 662 721 740 847LS (service space) 220 220 280 240 240 300 360 360 485W 201 201 201 201 201 201 201 201 201DN in 25 25 25 40 40 40 50 50 50DN out 20 20 20 32 32 32 40 40 40PN [bar] 25/40 63 25/40 25/40 63 25/40 25/40 63 25/40Face groove D H D D H D D H D

32

Dimensions RC pumps


Top-suction pump for welding

TM04

802

5 27

10

Dimension [mm] RC2-7 RC2-10 RC5-7 RC5-10 RC8-7 RC8-10System pressure [bar] 25/40/52 25/40/52 25/40/52 25/40/52 25/40/52 25/40/52A 150 150 180 180 242 242B 76 76 76 76 76 76C 130 130 130 130 130 130D 12 12 12 12 12 12E1 70 70 70 70 70 70E2 120 180 145 180 250 350E3 327 330 323 351 337 363E4 174 174 174 174 174 174E5 100 100 100 100 100 100H 228 228 228 228 228 228H1 110 110 110 110 110 110H2 110 110 110 110 110 110L (incl. cable) 736 799 757 820 876 1002L1 606 669 627 690 746 872LS (service space) 220 280 240 300 360 485W 201 201 201 201 201 201

in 33.7 x 2.6 33.7 x 2.6 48.3 x 2.6 48.3 x 2.6 60.3 x 2.9 60.3 x 2.9 out 26.9 x 2.3 26.9 x 2.3 42.4 x 2.6 42.4 x 2.6 48.3 x 2.6 48.3 x 2.6

33

Dimensions RC pumps


Service unit

TM04

802

4 27

10

Dimension [mm] RC2-7RC5-7RC2-10RC5-10RC8-7

RC8-10

System pressure [bar] 25/40/52 25/40/52 25/40/52H 228 228 228L (incl. cable) 685 811 937W 160 160 160

RC pumps

34

Service parts

Service parts

Service unitsIf it is necessary to replace an RC pump, a service unit is required. The pump sleeve can often remain in the system during replacement. It will only be necessary to replace the sleeve in the very rare cases where the sleeve has become damaged. Letting the sleeve stay in the system reduces the cost and time needed for carrying out a replacement.

The service unit is a complete pump (chamber stack, motor and cables), but without the pump sleeve and feet. A service unit comes with a complete set of new O-rings for the two internal interfaces and for the main seal (three different sizes).

The correct service unit can be selected from the tables in section Product range, pages 8 to 11. The part number of the correct service unit can also be found on the pump nameplate.

The same service unit can be used for all RC pump variants with identical refrigerant, rated flow and motor supply voltage. Variations in inlet/outlet configuration, flange or welding connection type and maximum system pressure have no influence on the selection of service unit.

Service kitsSet of gaskets for pump with DIN flange connectionsEach set includes gaskets for both inlet and outlet flange connections.

1 For maximum system pressure equal to 52 bar, the correct flanges are PN 63.

Set of O-rings for pump

Product number Description

97682644 RC2 25/40 bar

97682645 RC5 25/40 bar

97682646 RC8 25/40 bar

97682647 RC2 631 bar

97682648 RC2 631 bar

97682649 RC2 631 bar

Product number Description

97682653 O-ring kit (all pumps)

35

RC pumpsAccessories and service kits

Accessories

1 For maximum system pressure equal to 52 bar, the correct flanges are PN 63.

Product Description Dimensions Product numberTM

04 8

093

2810

Blind flange for pump sleeve. Complete set consisting of one blind flange, 16 screws and one O-ring.

97571010

TM04

809

4 28

10

Set of DIN blind flanges for pipe system. To be used for closing the pipe system if the pump sleeve is removed from the system. Blind flanges are to be installed on the counter flanges welded into the pipe system. Complete set consisting of one blind flange for inlet counter flange and one blind flange for outlet counter flange.For each blind flange a set of four bolts, four nuts and one gasket is included. Material certificates for both blind flanges are included in the set.

RC2 25/40 bar 97571017

RC5 25/40 bar 97571018

RC8 25/40 bar 97571019

RC2 631 bar 97571020

RC2 631 bar 97571021

RC2 631 bar 97571022

TM04

809

5 28

10

Set of DIN counter flanges for pipe system. To be used for connecting flanged versions of the RC pump to the pipe system. Counter flanges are to be welded into the pipe system. Complete set consisting of one counter flange for inlet connection and one counter flange for outlet connection.For each counter flange a set of four bolts, four nuts and one gasket is included. Material certificates for both counter flanges are included in the set.

RC2 25/40 bar 97571011

RC5 25/40 bar 97571012

RC8 25/40 bar 97571013

RC2 631 bar 97571014

RC2 631 bar 97571015

RC2 631 bar 97571016

Cables for power supply and PTC in lengths of either 5 m or 10 m. The power supply cable is screened (external screen). Cables for power supply and PTC must be ordered separately.

Power supply cable 5 m 97682654

Power supply cable 10 m 97682655

PTC cable 5 m 97682656

PTC cable10 m 97682657

36

Accessories and service kits RC pumps

Grundfos CUE, external frequency converters

Fig. 13 Grundfos CUE

The Grundfos CUE is a complete range of wall-mounted frequency converters for speed control of pump capacity.

Grundfos CUE provides a variety of benefits to the end-user, such as:

• Grundfos E-pump functionality and user interface• increased performance and lower energy

consumption compared to fixed-speed pump solutions

• control of solenoid valve in by-pass• simple installation and commissioning compared to

standard frequency converters.

Functions

Intuitive start-up guide The start-up guide enables easy installation and commissioning as well as plug-and-pump convenience. Few settings need to be made by the installer as the rest is done automatically or preset from factory.

Smart user interface

Fig. 14 Grundfos CUE user interface

Grundfos CUE features a unique user-friendly control panel with graphic display and easy-to-use buttons. Panel layout resembles the well-known Grundfos R100 remote control, which is used with Grundfos E-pumps.

ControlGrundfos CUE has a built-in PI controller offering closed-loop control of the differential pressure.

Wide product rangeThe CUE product range is quite comprehensive, covering five different voltage ranges, enclosure classes IP20/21 (Nema 1) and IP54/55 (Nema 12), and a wide range of output powers.

The table below provides a general overview of the products relevant for RC pumps.

External communicationGrundfos CUE can communicate with LON, Profibus, Modbus or BACnet via a Grundfos CIU (Communication Interface Unit).

GrA

440

4

TM04

328

3 41

08

Input voltage [V] Output voltage [V] Motor [kW]1 x 200-240 3 x 200-240 1.1 - 7.5 3 x 200-240 3 x 200-240 0.75 - 45 3 x 380-500 3 x 380-500 0.55 - 250

37

RC pumpsFurther product documentation

WebCAPSWebCAPS is a Web-based Computer Aided Product Selection program available on www.grundfos.com.

WebCAPS contains detailed information on more than 185,000 Grundfos products in more than 20 languages.

In WebCAPS, all information is divided into six sections:

• Catalogue• Literature• Service• Sizing• Replacement• CAD drawings.

.

Catalogue

This section is based on fields of application and pump types, and contains • technical data• curves (QH, Eta, P1, P2, etc.) which can be adapted to the

density and viscosity of the pumped liquid and show the number of pumps in operation

• product photos• dimensional drawings• wiring diagrams• quotation texts, etc.

.

Literature

In this section you can access all the latest documents of a given pump, such as• data booklets• installation and operating instructions• service documentation, such as Service kit catalogue and

Service kit instructions• quick guides• product brochures.

.

Service

This section contains an easy-to-use interactive service catalogue. Here you can find and identify service parts of both existing and discontinued Grundfos pumps.Furthermore, this section contains service videos showing you how to replace service parts.

38

Further product documentation

RC pumps

WinCAPS

Fig. 15 WinCAPS CD-ROM

WinCAPS is a Windows-based Computer Aided Product Selection program containing detailed information on more than 185,000 Grundfos products in more than 20 languages.

The program contains the same features and functions as WebCAPS, but is an ideal solution if no Internet connection is available.

WinCAPS is available on CD-ROM and updated once a year.

.

Sizing

This section is based on different fields of application and installation examples, and gives easy step-by-step instructions in how to• select the most suitable and efficient pump for your installation• carry out advanced calculations based on energy consumption,

payback periods, load profiles, life cycle costs, etc.• analyse your selected pump via the built-in life cycle cost tool• determine the flow velocity in wastewater applications, etc.

.

Replacement

In this section you find a guide to selecting and comparing replacement data of an installed pump in order to replace the pump with a more efficient Grundfos pump. The section contains replacement data of a wide range of pumps produced by other manufacturers than Grundfos.

Based on an easy step-by-step guide, you can compare Grundfos pumps with the one you have installed on your site. When you have specified the installed pump, the guide will suggest a number of Grundfos pumps which can improve both comfort and efficiency.

.

CAD drawings

In this section it is possible to download 2-dimensional (2D) and 3-dimensional (3D) CAD drawings of most Grundfos pumps.

These formats are available in WebCAPS:

2-dimensional drawings:• .dxf, wireframe drawings• .dwg, wireframe drawings.

3-dimensional drawings:• .dwg, wireframe drawings (without surfaces)• .stp, solid drawings (with surfaces)• .eprt, E-drawings.

0 1

Subject to alterations.

www.grundfos.com

Being responsible is our foundationThinking ahead makes it possible

Innovation is the essence

GRUNDFOS A/S . DK-8850 Bjerringbro . DenmarkTelephone: +45 87 50 14 00

The name Grundfos, the Grundfos logo, and the payoff Be–Think–Innovate are registrated trademarks owned by Grundfos Management A/S or Grundfos A/S, Denmark. All rights reserved worldwide.

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Documents

GRUNDFOS DATA BOOKLET - AMMONIA21 RC - Data Booklet... · 2019. 11. 5. · WinCAPS 38. 3 Introduction RC pumps General data Introduction This data booklet deals with Grundfos RC refrigerant