Grundfos SPK Series, CRK Series, MTR Series, SPK1, SPK2 Installation And Operating Instructions Manual
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Installation and Operating Instructions
CONTENTS
SAFETY WARNING
Page 1
PRE-INSTALLATION CHECKLIST
INSTALLATION PROCEDURES
Pages 1-2
OPERATING THE PUMP
Page 3-4
MOTORS
Page 5
TROUBLESHOOTING
Page 6-7
LIMITED WARRANTY
Page 10
Please leave these instructions with the pump for future reference
SAFETY 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 motor frame to
the power supply's grounding terminal is required for safe
installation and operation.
In all installations, the above-ground metal plumbing should be
connected to the power supply ground as described in Article
250-80 of the National Electrical Code.
1. Confirm You Have The Right Pump
• Read the nameplate to ensure it is the one you ordered
• Compare the pump's nameplate data or its
performance curve (for head, GPM, etc.) with the
application in which you plan to install it.
Will it do what you expect it to do?
1.1 Pump Key for SPK/CRK
CRK 4 - 160 / 2 -x -x -x -xxxx
Pump Range
Nominal Flow Rate in m
Number of Stages x 10 (SPK x 1)
Number of Impellers
Code for Pump Version
Code for Pipework Connection
Code for Materials
Code for Shaft Seal and Rubber Pump Parts
1.2 Pump Key for MTR
Pump Range
Nominal Flow Rate in m
Number of Stages
Number of Impellers
pump has fewer impellers than chambers)
Number of impellers with reduced diameter
Code for Pump Version
Code for Pipework Connection
Code for Materials
Code for Shaft Seal
Code for Pump Version
Type of Pump
A = Standard pump
U = NEMA pump
Code for Pipe Work Connection
F = DIN flange
G = ANSI flange
J = JIS flange
W = Internal thread
U - G - A - BUBE
Type of Shaft Seal
A = O-ring seal with fixed seal driver
B = Rubber bellows seal
C = O-ring seal with a spring working
as a driver
R = O-ring seal with reduced diameter
stationary ring
H = Balanced seal, cartridge
E = O-ring seal, cartridge
Material of Rotating Ring
B = Carbon, plastic impregnated
C = Other types of carbon
U = Tungsten carbide
Q = Silicon carbide
V = Aluminum oxide
3
/h
MTR 32 - 2 /1 -1 -x -x -x -xxxx
3
/h
(is only used if the
Physical Changes
B = Oversized motor
P = Undersized motor
T = Oversized motor
X = Special product
Code for Materials
A = Standard materials
I = Nonstainless parts converted to SS
K = Intermediate bearings are bronze
X = Special product
D = Graflon® bearing
Materials of Secondary
Seal and other Parts
made of Plastic/Rubber
E = EPDM
V = FKM
K = Kalrez
X = Special product
Material of Stationary Ring
B = Carbon, plastic impregnated
C = Other types of carbon
U = Tungsten carbide
Q = Silicon carbide
V = Aluminum oxide
H = Carbon with imbedded Tungsten
(1 flange size smaller)
(2 flange sizes larger)
Carbide (Hybrid)
Electrical Work
All electrical work should be performed by a qualified electrician
in accordance with the latest edition of the National Electrical
Code, local codes and regulations.
WARNING:
The safe operation of this pump requires that it be grounded in
accordance with the National Electrical Code and local governing codes
or regulations. Connect the ground wire to the grounding screw in the
terminal box and then to the acceptable grounding point.
Pre-Installation Checklist
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, it should remain in the carton
until you are ready to install it. At that point, look at the
pump and examine it for any damage that may have
occurred during shipping. Examine any other parts of the
shipment as well (electrical control boxes, etc) for any
visible damage. If you find any, contact the transportation
company in writing and ask to have it inspected.
3. Electrical Requirements
Supply Power
The incoming electrical supply should be verified so the
voltage, phase and frequency match that of the pump
motor. The proper operating voltage and other electrical
information can be found on the motor nameplate. These
motors are designed to run on ±10% of the nameplaterated voltage. For dual-voltage motors, the motor should
be internally connected to operate on the voltage closest to
the 10% rating, i.e., a 208 voltage motor wired per the 208
volt connection diagram. Wiring connection diagrams can
be found on the plates attached to the motor.
If voltage variations are larger than ±10%, do not
operate the pump.
Field Wiring
Wire sizes should be based on the current carrying
properties of a conductor as required by the latest edition of
the National Electrical Code or local regulations. Direct on
line (D.O.L.) starting is approved due to the extremely fast
run-up time of the motor and the low moment of inertia of
pump and motor. If D.O.L. starting is not acceptable and
reduced starting current is required, an auto transformer or
resistant starter should be used. It is suggested that a
fused disconnect be used for each pump where service
and standby pumps are installed.
Motor Protection
1. Single-Phase Motors:
With the exception of 7
require external protection) single-phase SPK/CRK
pumps are equipped with multi-voltage, squirrel-cage
induction motors with built-in thermal protection.
1
/2 and 10 HP motors (which
Page 1
Installation Procedures
DISCHARGE
Standard
Terminal Box
Position
Can be
rotated in
90˚ increments
2. Three-Phase Motors:
SPK/CRK/MTR Pumps with three-phase motors must be
used with the proper size and type of motor-starter to
ensure the motor is protected against damage from low
voltage, phase failure, current imbalance and overloads.
A properly sized starter with manual reset and ambientcompensated extra quick trip in all three legs should be
used. The overload should be sized and adjusted to the
full-load current rating of the motor. Under no
circumstances should the overloads be set to a higher
value than the full load current shown on the motor
nameplate. This will void the warranty.
Overloads for auto transformers and resistant starters
should be sized in accordance with the recommendations of the manufacturer.
4. Glance Through This Guide
Even if you are very familiar with the installation of this
pump, a quick glance through the remaining sections of this
guide may help you avoid a potential problem.
Installation Procedures
Installing The Pump
Pump Location
Grundfos SPK/CRK/MTR pumps are
designed for tank-mounting and may
be installed in either a vertical or
horizontal orientation. Where the
unit is to be installed so as to
position its mounting flange below
the liquid level or in a pressurized
tank, a gasket must be fitted
between the pump's mounting flange
and tank.
Pump Mounting
Model
SPK1/2/4/8 (NEMA) 5.5" (140) 6.3" (160) 7.1" (180) 1
SPK1/2/4 (IEC) 3.9" (100) 4.5" (115) 5.1" (130)
SPK8 (IEC) 5.5" (140) 6.3" (160) 7.1" (180) 1
CRK2/4 (NEMA) 5.5" (140) 6.3" (160) 7.1" (180) 1
CRK2/4 (IEC) 5.5" (140) 6.3" (160) 7.1" (180) 1
CRK8/16 (NEMA) 7.9" (200) 8.9" (225) 9.9" (250) 2.0" NPT 0.35" (9)
MTR32 7.5" (190) 8.7" (220) 9.9" (250) 2
MTR45/64 9.5" (240) 10.5" (265) 11.4" (290) 2
∅∅
∅A
∅∅
Pipework
The discharge ports of SPK/CRK pump units which are supplied
for use with NEMA motors have 1
Other discharge pipe sizes must be accommodated via the use
of appropriate adapter bushings.
Suction Conditions
The bottom of the pump strainer must be at least 1.0 inch above
the bottom of the tank. The pumps are designed to provide full
performance down to a level of A mm above the bottom of the
strainer.
Page 2
3
⁄8"
3
8
/
"
Mounting
(9.5 mm)
Holes (4)
∅∅
∅B
∅∅
1
⁄4 inch female NPT threads.
7.1" (180 mm)
C
6.3" (160 mm)
B
5.5" (140 mm)
A
Discharge
1
4
1/
"
Female NPT
∅∅
∅C Discharge Hole Dia.
∅∅
1
⁄4" NPT 0.28" (7)
3
⁄4" BSPT 0.28" (7)
1
⁄4" BSPT 0.28" (7)
1
⁄4" NPT 0.37" (9.5)
1
⁄4" BSPT 0.30" (7.5)
1
⁄2" ANSI 0.47" (12)
1
⁄2" ANSI 0.47" (12)
At a liquid level between A and B mm above the bottom of the
strainer, the built-in priming screw will protect the pump against
dry running.
MTR32, 45 and 64 pumps have no priming screw.
Figure 1: CRK2/4•SPK1/2/4/8
1"
PUMP TYPE A (IN.) B (IN.)
CRK2/4 1 5⁄8"1 1⁄8"
CRK8/16 2.0" 1.0"
SPK1/2/4/8 1
MTR32/45/64 2
5
⁄8" 1.0"
3
⁄4" –
In general, it is recommended that
the pump strainer be located as near
Figure 2: CRK8/16
as possible to the bottom of the tank.
This maximizes first-stage
submersion in condensate transfer
applications and maintains fluid
velocities in cutting lubricant
1"
Figure 3: MTR32/45/64
applications (see Figure 4).
Figure 4
1"
Separation of Particles
Out of consideration for the pump, the distribution system, the
cutting tools and the treated materials, cooling/cutting fluids
should, wherever possible, be free of particles before entering
the pump unit. The system's requirements as to the purity of the
pumped fluid depend on the machining methods, the treated
materials and other criteria. Filtration methods should be
matched to these requirements. Larger particles are unable to
enter the pump with the pumped fluid due to the effect of the
built-in inlet screen; particles
enter the SPK and CRK pumps, and particles
∅∅
∅2 mm or smaller are allowed to
∅∅
∅∅
∅4 mm or smaller
∅∅
are allowed to enter the MTR pump.
Bypass
A bypass line or pressure relief valve should be installed in the
discharge pipe if there is any possibility the pump may operate
against a closed valve in the discharge line (or in any other noflow condition). Flow through the pump is required to ensure
adequate cooling and lubrication of the pump is maintained.
The following table shows minimum flow rates:
PUMP TYPE MINIMUM FLOW RATE
SPK1 1.0 GPM
SPK2 1.2 GPM
SPK4 3.0 GPM
SPK8 5.3 GPM
CRK2 1.2 GPM
CRK4 3.0 GPM
CRK8 5.3 GPM
CRK 16 8.5 GPM
MTR 32 15 GPM up to 176°F (80°C)
MTR45 20 GPM up to 176°F (80°C)
MTR64 28 GPM up to 176°F (80°C)
35 GPM 176° - 194°F (80-70°C)
44 GPM 176° - 194°F
66 GPM 176°F - 194°F (80°C - 80°C)
Operating The Pump
DISCHARGE
Standard
Terminal Box
Position
Can be
rotated in
90˚ increments
Position of Terminal Box
The motor terminal box can be turned to any of four positions in
90° steps. To rotate the terminal box, remove the four bolts
securing the motor to the pump; turn the motor to the desired
location; replace and securely tighten the four bolts.
Boiler Feed Installations
If the pump is being used as a
DISCHARGE
boiler-feed pump, make sure the
pump is capable of supplying
sufficient water throughout its
entire evaporation and pressure
ranges. Where modulating
control valves are used, a
bypass around the pump must
be installed to ensure pump
lubrication.
Standard
Terminal
Box
Position
Can be
rotated in
90° increments
Operating the Pump
Replacing The Motor
If the motor is damaged due to bearing failure, burning or
electrical failure, the following instructions detail how to remove
the motor for replacement. It must be emphasized that motors
used on SPK/CRK/MTR pumps are specially selected to our
rigid specifications. Replacement motors must be of the same
frame size.
Removing the Old Motor
1. Remove the coupling guard screens.
2. Using the proper
cap screws in the coupling.
3. With the correct size wrench, loosen and remove the
four bolts which hold the motor to the discharge section
of the pump end.
4. Lift the motor straight up until the shaft is free from the
coupling.
Installing the New Motor
1. Thoroughly clean the surfaces of the motor and pump
end mounting flanges. Set the motor on the pump end.
2. Place the terminal box in the desired position by rotating
the motor.
3. Insert the mounting bolts, then tighten diagonally and
evenly.
4. Using a larger screwdriver, raise the pump shaft by
placing the tip of the screwdriver under the coupling and
carefully elevating the coupling to its highest point.
Note: The shaft can only be raised approximately 0.20
inches (5 mm).
5. Now
lower
you just raised it (approximately the thickness of a
dime), and retighten the
coupling. Be sure to tighten the top and bottom screws
on one side of the coupling and then the other.
the coupling screws to the following specifications.
metric
allen wrench, loosen the four
the shaft halfway back down the distance
metric
cap screws in the
Coupling
Bolt Size
M6
M8
M10
Minimum Torque
Specifications
10 ft-lbs
23 ft-lbs
46 ft-lbs
Torque
6. Check to see that the gaps between the coupling halves
are equal. Loosen and re-adjust if necessary.
7. Be certain the pump shaft can be rotated by hand. If
the shaft cannot be rotated or it binds, disassemble and
check for misalignment.
8. Replace the two coupling guard screens.
Starting The Pump The First Time
1. Air Elimination
As long as the pump body is partially submerged in fluid, the
pump may be started against an open or a closed discharge
line. If the discharge line is open, the air will quickly escape
through the discharge pipe. If the discharge line is closed,
the air will be pressed down through the pump body and out
into the tank so that the discharge pressure will quickly reach
its maximum (shutoff) level.
If the pump is fitted with a vent valve, this valve must be
opened while running the pump against a closed valve.
Once a steady stream of liquid is running out of this vent
valve it can be closed.
2. Check the Direction of Rotation
a. Switch the POWER OFF.
b. Make sure the pump has been filled and vented.
c. Remove the coupling guard and rotate the pump shaft
to be certain it turns freely. Replace the coupling
guard.
d. Verify that the electrical connections are in accordance
with the wiring diagram on the motor.
e. Switch the power on and observe the direction of
rotation. When viewed from the top, the pump
should rotate counter-clockwise.
f. To reverse the direction of rotation, first switch OFF the
supply power.
g. On three-phase motors, switch any two power leads at
the load side of the starter. On single-phase motors,
refer to the connection diagram on the nameplate.
Change wiring as required.
h. Switch the power ON and check for proper motor
rotation.
Starting And Adjusting
Before starting the pump, make sure that:
1. The pump body is partially submerged in the fluid.
2. The direction of rotation is counter-clockwise when
viewed from the top.
3. All piping connections are tight and the pipes are
adequately supported.
4. The pump inlet screen is clean and unblocked.
5. Depending on the application, it may be necessary to
start the pump against a closed discharge valve in order
to prevent system damage due to water hammer. If so,
this valve should be opened in a gradual manner after the
pump is started. Unless used as a flow throttling device,
make sure this valve is completely opened.
6. Check and record the voltage and amperage of the
motor. Adjust the motor overloads if required.
7. Check and record operating pressures if pressure
gauges have been installed.
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