Grundfos CR-H User manual

CR-H, CRN-H
GRUNDFOS INSTRUCTIONS
Installation and operating instructions

2

3
CR-H, CRN-H
Installation and operating instructions 4
Notice d’installation et d’entretien 19
Instrucciones de instalación y funcionamiento 37

4
LIMITED WARRANTY
Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are warranted
to the original user only to be free of defects in material and workmanship for a period of
24 months from date of installation, but not more than 30 months from date of manufacture.
Grundfos' liability under this warranty shall be limited to repairing or replacing at Grundfos'
option, without charge, F.O.B. Grundfos' factory or authorized service station, any product
of Grundfos' manufacture. Grundfos will not be liable for any costs of removal, installation,
transportation, or any other charges which may arise in connection with a warranty claim.
Products which are sold but not manufactured by Grundfos are subject to the warranty
provided by the manufacturer of said products and not by Grundfos' warranty. Grundfos will
not be liable for damage or wear to products caused by abnormal operating conditions,
accident, abuse, misuse, unauthorized alteration or repair, or if the product was not installed
in accordance with Grundfos' printed installation and operating instructions.
To obtain service under this warranty, the defective product must be returned to the
distributor or dealer of Grundfos' products from which it was purchased together with proof
of purchase and installation date, failure date, and supporting installation data. Unless
otherwise provided, the distributor or dealer will contact Grundfos or an authorized service
station for instructions. Any defective product to be returned to Grundfos or a service station
must be sent freight prepaid; documentation supporting the warranty 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.
Some jurisdictions do not allow the exclusion or limitation of incidental or consequential
damages and some jurisdictions do not allow limit actions on how long implied warranties
may last. Therefore, the above limitations or exclusions may not apply to you. This warranty
gives you specific legal rights and you may also have other rights which vary from
jurisdiction to jurisdiction.

5
CONTENTS
Page
1. Symbols used in this document 5
2. Delivery 5
2.1 Check that you have the right pump 5
2.2 Check the condition of the pump 5
3. Identification 6
3.1 Type key for CR, CRN 1s, 1, 3, 5, 10, 15 and 20 H 6
3.2 Type key for CR, CRN 32, 45, 64 and 90 H 6
4. Codes 6
5. Applications 7
5.1 Pumped liquids 7
6. Operating conditions 7
6.1 Ambient temperature and altitude 7
6.2 Liquid temperature 7
6.3 Maximum permissible operating pressure and liquid
temperature for the shaft seal 7
6.4 Minimum inlet pressure – NPSHR 8
6.5 Maximum inlet pressure 8
6.6 Minimum flow rate 9
7. Technical data 9
7.1 Electrical data 9
7.2 Frequency of starts and stops 9
7.3 Dimensions and weights 9
7.4 Sound pressure level 9
8. Installation 9
8.1 Base plate 9
8.2 Foundation 9
8.3 Vibration dampening 10
8.4 Mounting on a Grundfos base plate 11
8.4.1 Bolt torques 11
8.5 Outdoor installation 11
8.6 Hot surfaces 11
8.7 Tightening torques 11
8.8 Piping 12
8.9 Recommended piping practices 12
8.10 Check valves 12
8.11 Bypass 12
8.12 Assembly of motor and pump end 12
9. Electrical connection 13
9.1 Single-phase motors 13
9.2 Three-phase motors 13
9.3 Frequency converter operation 13
10. Start-up 14
10.1 Start-up procedure 14
11. Maintenance 14
11.1 Motor inspection 14
11.2 Motor lubrication 15
11.3 Motor lubrication schedule
(for motors with grease fittings) 15
11.4 Preventative maintenance 16
12. Frost protection 16
13. Service 16
13.1 Service kits and service documentation 16
14. Start-up (air-cooled top) 17
15. Troubleshooting 18
16. Disposal 18
1. Symbols used in this document
2. Delivery
2.1 Check that you have the right pump
Read the pump nameplate to make sure you have received the
pump you ordered.
2.2 Check the condition of the pump
The shipping carton your pump came in is specially designed
around your pump during production to prevent damage. As a
precaution, the pump should remain in the carton until you are
ready to install it. Examine the pump for any damage that may
have occurred during shipping. Examine any other parts of the
shipment as well for any visible damage.
If the pump is supplied as a complete unit (motor attached to
pump end), the position of the coupling (that connects the pump
shaft to the motor shaft) is set at factory specifications. No
adjustment is required.
If the unit is supplied as a pump end only, follow the adjustment
procedures in section 8.12 Assembly of motor and pump end.
Pump without motor (CR, CRN 1s, 1, 3, 5, 10, 15 and 20 H
only)
If you purchased a pump without a motor, the shaft seal has been
set by the factory. Do not loosen the three set screws on the shaft
seal when attaching the motor.
Pump without motor (CR, CRN 32, 45, 64 and 90 H only)
If you purchased a pump without a motor, you must install the
shaft seal. The shaft seal is protected in its own sub boxing within
the pump packaging crate. Read the seal installation instructions
which are included in the pump package.
Pump without motor (all)
To protect the shaft and bearings during shipment, a shaft holder
protective device is used. This device must be removed prior to
installation of the shaft seal or motor.
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
If these safety instructions are not observed,
it may result in personal injury!
Caution
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment!
Note
Notes or instructions that make the job easier
and ensure safe operation.
Warning
When the shipment is received, extreme care
should be exercised during unloading. Heavy
parts should be skidded to the ground if lifting
equipment is not available. It is recommended a
forklift or crane be used to unload the equipment.
Do not drop the unit, or any parts, as damage may
cause trouble in assembly and operation of the
units.
CR-H Centrifugal pump with standard cast-iron and
304 stainless-steel construction
CRN-H Centrifugal pump; all parts in contact with water are
316 stainless-steel construction
CRE-H Centrifugal pump with a Grundfos MLE VFD motor
attached

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3. Identification
3.1 Type key for CR, CRN 1s, 1, 3, 5, 10, 15 and 20 H
3.2 Type key for CR, CRN 32, 45, 64 and 90 H
4. Codes
Example CR 3-10H-X-X-X-XXXX
Pump range: CR, CRN
Rated flow rate in m3/h (x 5 = GPM)
Number of impellers
Code for pump version
H: Horizontal pump
Code for pipework connection
Code for materials
Code for rubber pump parts
Code for shaft seal
Example CR 32 -2 -1 H- X- X- X- XXXX
Pump range: CR, CRN
Rated flow rate in m3/h (x 5 = GPM)
Number of stages
Number of impellers with reduced diameter
Code for pump version
H: Horizontal pump
Code for pipework connection
Code for materials
Code for rubber pump parts
Code for shaft seal
Example H-GA-A-E-HQQE
Pump version
A Basic version*
BOversizemotor
E Certificate/approval
FCR 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
TOversize motor
(two flange sizes bigger)
X Special version*
Pipework connection (suction x discharge)
GA ANSI 1.5" x 1"
GB ANSI 3" x 1.5"
GC ANSI 3" x 2"
G05 ANSI 2" x 1"
G10 ANSI 3" x 2"
G20 ANSI 3" x 1.5
G30 ANSI 3" x 1.5"
G40 ANSI 4" x 3"
G50 ANSI 3" x 1.5"
G60 ANSI 3" x 2"
G70 ANSI 4" x 3"
G22 ANSI 2" x 2"
G33 ANSI 3" x 3"
G44 ANSI 4" x 4"
Materials
A Basic version
D Carbon-graphite-filled PTFE (bearings)
G Wetted parts AISI 316
GI All parts stainless steel, wetted parts AISI 316
I Wetted parts AISI 304
II All parts stainless steel, wetted parts AISI 304
K Bronze (bearings)
S SiC bearings + PTFE neck rings
X Special version
Rubber pump parts
E EPDM
FFXM
KFFKM
VFKM
Shaft seal
H Balanced cartridge seal with O-ring
K Metal-bellows cartridge seal
O Double seal, back-to-back
P Double seal, tandem
X Special version
B Carbon, synthetic-resin-impregnated
H Cemented tungsten carbide, embedded (hybrid)
Q Silicon carbide
U Cemented tungsten carbide
X Other ceramics
E EPDM
FFXM
KFFKM
VFKM
* If a pump covers more than two pump versions, the code for
the pump version is X. X also indicates special pump versions
not listed above.
Example H-GA-A-E-HQQE

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5. Applications
Grundfos multistage, horizontal, end-suction centrifugal pumps,
types CR-H and CRN-H, are designed for a wide range of
applications.
CR-H and CRN-H
CR-H and CRN-H pumps are suitable for liquid transfer,
circulation and pressure boosting of cold or hot clean liquids.
CRN-H
Use CRN-H pumps in systems where all parts in contact with the
liquid are made of high-grade stainless steel.
5.1 Pumped liquids
The CR-H and CRN-H are capable of pumping thin, clean, non-
flammable liquids, not containing solid particles or fibers. The
liquid must not attack the pump materials chemically.
When pumping liquids with a density and/or viscosity higher than
that of water, use motors with correspondingly higher outputs,
if required.
6. Operating conditions
6.1 Ambient temperature and altitude
If the ambient temperature exceeds the maximum temperature
limits of the pump or 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. 1 Relationship between motor output (P2) and
ambient temperature/altitude
Legend
Example: From fig. 1 it appears that P2must be reduced to 88 %
when a pump with a NEMA Premium efficiency, ML motor is
installed 15584 feet above sea level. At an ambient temperature
of 167 °F, P2of a standard efficiency motor must be reduced to
74 % of rated output.
6.2 Liquid temperature
The tables on pages 19 and 20 state the relationship between
liquid temperature range and maximum permissible operating
pressure.
6.3 Maximum permissible operating pressure and
liquid temperature for the shaft seal
CR 1s to CR 20 H
Fig. 2 Operating range of standard shaft seals for CR 1s to
CR 20 H
CR 32 to CR 90 H
Fig. 3 Operating range of standard shaft seals for CR 32 to
CR 90 H
TM03 4272 2006
Pos. Description
1 NEMA Standard efficiency motors
2 NEMA Premium efficiency motors
Note
The maximum permissible operating pressure
and liquid temperature ranges apply to the pump
only.
60 80 100 120 140 160 180
T [°F]
50
60
70
80
90
100
[%]
P2
1
2
3280 7382 11483 15584 ft
Note
The diagrams below apply to clean water and
water containing anti-freeze liquid.
TM02 7537 1409TM04 4473 1409
Shaft
seal Description
Max.
temperature
range
[°F]
HQQE O-ring (cartridge) (balanced seal),
SiC/SiC, EPDM –22 °F to +248 °F
HQQV O-ring (cartridge) (balanced seal),
SiC/SiC, FKM –4 °F to +194 °F
HUBE O-ring (cartridge) (balanced seal),
TC/carbon, EPDM +32 °F to +248 °F
HUBV O-ring (cartridge) (balanced seal),
TC/carbon, FKM +32 °F to +194 °F
KUBE Bellows, metal (cartridge),
TC/carbon, EPDM +32 °F to +248 °F
KUBV Bellows, metal (cartridge),
TC/carbon, FKM +32 °F to +194 °F
KUHE Bellows, metal (cartridge), TC/carbon with embedded TC,
EPDM +32 °F to +194 °F
KUHV Bellows, metal (cartridge), TC/carbon with embedded TC,
FKM +32 °F to +194 °F
KUUE Bellows, metal (cartridge),
TC/TC, EPDM –22 °F to +194 °F
KUUV Bellows, metal (cartridge),
TC/TC, FKM –4 °F to +194 °F
TC = tungsten carbide.
-40 040 80 120 160 200 240 t [°F]
0
100
200
300
400
[psi]
p
-40 -20 020 40 60 80 100 t [°C]
0
5
10
15
20
25
[bar]
p
HQQE
HQQV HQQE
HQQE
-40 040 80 120 160 200 240 t [°F]
0
100
200
300
400
500
[psi]
p
-40 -20 020 40 60 80 100 t [°C]
0
5
10
15
20
25
30
[bar]
p
KUBE
HQQE / HQQV HQQE
KUUE KUUE KUUV
KUBE / KUBV
KUUE / KUUV
KUHE / KUHV

8
CRN-H pumps using a type H shaft seal with EPDM rubber parts,
HxxE, can be cleaned in place (CIP) with liquids up to 302 °F
(150 °C) for maximum 15 minutes.
CR-H and CRN-H pumps are not suitable for the pumping of
liquids above 248 °F (120 °C) for long periods.
6.4 Minimum inlet pressure – NPSHR
Calculation of the inlet pressure "H" is recommended in the
following cases:
• When the liquid temperature is high.
• When the flow is significantly higher than the rated flow.
• When the water is drawn from depths.
• When the water is drawn through long pipes.
• When the inlet conditions are poor.
To avoid cavitation, make sure that there is a minimum pressure
on the suction side of the pump.
The maximum suction lift "H" in feet can be calculated as follows:
H = pb– NPSHR – Hf– Hv– Hs
pb= Barometric pressure in feet absolute.
(Barometric pressure can be set to 33.9 feet at sea
level.)
In closed systems, pbindicates system pressure in
feet.
NPSHR = Net Positive Suction Head Required in feet.
(To be read from the NPSHR curve at the highest
flow the pump will be delivering.)
Hf= Friction loss in suction pipe in feet.
(At the highest flow the pump will be delivering.)
Hv= Vapor pressure in feet.
(To be read from the vapor pressure scale. "Hv"
depends on the liquid temperature "Tm".)
Hs= Safety margin = minimum 2.0 feet.
If the "H" calculated is positive, the pump can operate at a suction
lift of maximum "H" feet.
If the "H" calculated is negative, an inlet pressure of minimum "H"
feet is required.
Fig. 4 Minimum inlet pressure – NPSHR
Always check the NPSHR value of the pump at the highest
possible flow. The NPSH curves can be found on pages 17
and 18.
6.5 Maximum inlet pressure
The table on page 21 states the maximum permissible inlet
pressure. However, the actual inlet pressure + maximum pump
pressure (at no flow) must always be lower than the maximum
operating pressures stated on pages 19 and 20.
The pumps are pressure-tested at a pressure of 1.5 times the
values stated on pages 19 and 20.
Note
The pumping of liquids above 248 °F (120 °C) may
result in periodical noise and reduced pump life.
TM04 3689 4808
Note
In order to avoid cavitation, never select a pump
whose duty point lies too far to the right on the
NPSHR curve.
66
49
39
33
26
20
16
13
10
6.6
3.3
2.6
2.0
1.3
0.9
0.7
0.3
4.9
250
230
194
212
176
158
140
122
104
86
68
50
32
Hv
(Ft)
tm
(°F)
300
270
280
82
115
148
131
98
320
340
360
370
203
259
328
413
Hf
pbNPSHR
Hv
H

9
6.6 Minimum flow rate
Due to the risk of overheating, do not use the pump at flows
below the minimum flow rate.
The curves below show the minimum flow rate as a percentage of
the rated flow rate in relation to the liquid temperature.
Fig. 5 Minimum flow rate
Legend
7. Technical data
7.1 Electrical data
See motor nameplate and section 9. Electrical connection.
7.2 Frequency of starts and stops
7.3 Dimensions and weights
See CR-H, CRN-H Product Guide.
7.4 Sound pressure level
See page 22.
8. Installation
The pump must be secured to a horizontal plane and solid
foundation by bolts. When installing the pump, follow the
instructions in the following sections.
8.1 Base plate
Make sure that the base plate is clean of any debris. It may also
be necessary to have the base plate coated to protect the
material.
8.2 Foundation
The foundation/installation should be carried out in accordance
with the following instructions.
Grundfos recommends to install the pump on a concrete
foundation which is heavy enough to provide permanent and rigid
support to the entire pump. The foundation must be capable of
absorbing any vibration, normal strain or shock. As a rule of
thumb, the weight of the concrete foundation should be 1.5 times
the weight of the pump and base plate. The concrete foundation
must have an absolutely level and even surface.
Place the pump and base plate assembly on the foundation, and
fasten it. The base plate must be supported on the whole area.
See fig. 6.
Fig. 6 Correct installation
The foundation should be at least 3 to 6 inches longer and wider
than the base plate.
The mass of the foundation must be at least 1.5 times the total
mass of the pump and base plate assembly.
In installations where noiseless operation is particularly
important, a foundation with a mass up to 5 times that of the
pump and base plate assembly is recommended. The pump may
be fastened directly to an existing concrete floor if the floor meets
the criteria of a foundation.
To properly hold the base plate to the foundation, proper
foundation bolts are required. For proper holding of the base
through the foundation, the bolt length should extend from in the
foundation, the base height, and 0.25" - 0.50" above the nut.
These foundation bolts are embedded in the concrete floor or
foundation, and should be positioned according to the bolt
manufacturer’s instructions. To assist in the proper location of the
bolts, a template can be formed. The bolt locations should be
double-checked with drawings and base.
TM02 7538 3703
Curves Description
CR-H with standard top
CR-H with air-cooled top
Caution
Never operate the pump against a closed
discharge valve.
Motor sizes Maximum number of starts per hour
Grundfos ML Baldor
0.33 to 5.0 hp 200 20
7.5 to 15 hp 100 15
20 to 100 hp 40 10
t [°F]
0
10
20
30
Qmin
[%]
40 60 80 100 120 140 160 180t [°C]
140 176 212 248 284 320 356104
Note
The pump should be placed as close to the liquid
source as possible. Adequate space for
operation and maintenance should be taken into
consideration.
TM04 3730 4908

10
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 7 (pos. b)
shows the foundation bolt and the bolt sleeve in which it is
installed.
Fig. 7 Bolt in position (pos. a) and bolt sleeve detail (pos. b)
When the foundation bolts are in position, the pump can be
placed on the foundation. The base plate can now be leveled
using shims, if necessary, so that it is completely horizontal.
See fig. 8.
Fig. 8 Alignment with shims
8.3 Vibration dampening
If vibration dampers are used, they must be installed under the
foundation.
Pumps with motor size ≤40 hp (30 kW) can use vibration
dampers as shown in fig. 9.
For pumps with motor sizes ≥50 hp (37 kW), use a vibration
damper as shown in fig. 10.
Fig. 9 Pump on vibration dampers
Fig. 10 Pump on vibration damper
TM03 4589 2206 - TM04 3731 4908
Pos. Description
1Nut
2 Washer
3 Base plate
4 Bolt sleeve
5 Non-bonding fill
6 Concrete
TM03 4588 2206
1
2
3
4
5
6
ba
Shims
TM04 3732 4908TM04 3733 4908
Vibration
dampers
Vibration
damper