INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
Series VSC® and VSCS®
Base Mounted
Centrifugal Pumps
(TO BE USED IN CONJUNCTION WITH VSC PARTS LIST CONTAINING LINE DRAWINGS)
DESCRIPTION
WARNING
ROTATING COMPONENTS
DISCONNECT AND LOCK OUT
POWER BEFORE SERVICING.
DO NOT OPERATE WITHOUT
ALL GUARDS IN PLACE.
CONSULT INSTALLATION
AND SERVICE INSTRUCTION
SHEET BEFORE OPERATING
OR SERVICING.
FAILURE TO FOLLOW
INSTRUCTIONS COULD
RESULT IN INJURY
OR DEATH.
P70642
WARNING
EYEBOLTS OR LIFTING
LUGS IF PROVIDED ARE
FOR LIFTING ONLY THE
COMPONENTS TO WHICH
THEY ARE ATTACHED.
FAILURE TO FOLLOW
INSTRUCTIONS COULD
RESULT IN INJURY
OR DEATH.
P70643
CAUTION
DO NOT RUN PUMP DRY,
SEAL DAMAGE MAY OCCUR.
INSPECT PUMP SEAL
REGULARLY FOR LEAKS,
REPLACE AS REQUIRED.
FOR LUBRICATION
REQUIREMENTS, CONSULT
SERVICE INSTRUCTIONS.
FAILURE TO FOLLOW
INSTRUCTIONS COULD
RESULT IN INJURY OR
PROPERTY DAMAGE.
P70644
CAUTION
COUPLER ALIGNMENT IS
REQUIRED! LEVEL AND GROUT
PUMP BEFORE USE!
CHECK ALIGNMENT BEFORE
GROUTING, AFTER SYSTEM IS
FILLED, AFTER SERVICING
PUMP, AND AS REQUIRED.
CONSULT THE SERVICE
INSTRUCTIONS FOR DETAILS.
FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD
RESULT IN INJURY OR
PROPERTY DAMAGE.
P70820
The VSC and VSCS Series centrifugal pumps are frame mounted
pumps which feature – high efficiency, rugged construction,
compact design, foot mounted volute, center drop out coupler,
and regreasable bearings. These features along with the vertically split case make installation, operation, and service easy to
perform.
OPERATIONAL LIMITS
Unless special provisions have been made for your pump by
Bell & Gossett, the operational limits for VSC/VSCS Series
Pumps are as follows:
Maximum Working Pressur
Listed on pump nameplate.
SEAL OPERATING LIMITS
Standard Seals
BUNA-PH Limitations 7-9; Temperature Range -40 to +225°F
EPT-PH Limitations 7-11; Temperature Range -40 to +250°F
For use on closed or open systems which are relatively free of
dirt and/or other abrasive particles.
Flushed Single Seals
PH Limitations 7-9; Temperature Range 0 to +250°F†
Note: On closed or open low pressure systems which may
contain a high concentration of abrasives an external flush is
required.
e
PUMP APPLICATION
The standard VSC and VSCS Series centrifugal pump’s br
fitted construction make it ideal for service with the following
liquids: unheated domestic and fresh water, boiler feed water
condensate, hydronic cooling or heating, pressure boosting,
general pumping and benign liquids.
For other applications contact your local B&G Representative.
Flushed Double Seals
PH Limitations 7-9; Temperature Range 0 to +250°F
Note: On closed or open low pressure systems which may
contain a high concentration of abrasives an external flush is
required.
Packing
PH Limitations 7-9; Temperatur
e Range 0 to +200°F
Note: On open or closed systems which require a large
amount of makeup water, as well as systems which are subjected to widely varying chemical conditions and solids buildup.
† For operating temperatures above 250°F a cooled flush is requir
and is recommended for temperatures above 225°F for optimum seal
life. On closed systems cooling is accomplished by inserting a small
heat exchanger in the flush line to cool the seal flushing fluid.
Flush-line Filters and Sediment Separators are available on special
request.
onze
ed
,
This safety alert symbol will be used in this manual and on the
pump safety Instruction decal to draw attention to safety related
instructions. When used, the safety alert symbol means
ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
FAILURE TO FOLLOW THE INSTRUCTIONS MAY RESULT IN
A SAFETY HAZARD.
Your VSC/VSCS Series Pump should have the following safety
instruction decals located approximately as shown. If the
decals are missing or illegible contact your local B&G representative for a replacement.
2
SAFETY
INSTRUCTION
ALTERNATE
LOCATION
(2) REQUIRED
(1 EACH SIDE)
ADDITIONAL SAFETY REQUIREMENTS:
ELECTRICAL SAFETY:
MECHANICAL SAFETY:
WARNING: Electrical Shock Hazard
Electrical connections to be made by a qualified
electrician in accordance with all applicable codes, ordinances, and good practices. Failure to follow these instructions could result in serious personal injury or death,
or property damage.
WARNING: Electrical Overload Hazard
Three phase motors must have properly sized
heaters to provide overload and undervoltage protection.
Single phase motors have built-in overload protectors.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
THERMAL SAFETY:
WARNING: Extreme Temperature Hazard
If pump, motor, or piping are operating at extremely
high or low temperatures, guarding or insulation is required. Failure to follow these instructions could result in
serious personal injury or death, or pr
operty damage.
PUMP LOCATION
Locate the pump so there is sufficient room for inspection, maintenance and service. If the use of a hoist or tackle is needed,
allow ample head room.
WARNING: Unexpected Startup Hazard
Disconnect and lockout power before servicing.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
W
ARNING: Excessive System Pressure Hazard
The maximum working pressure of the pump is listed
on the nameplate, do not exceed this pressure. Failure to
follow these instructions could r
esult in serious personal
injury or death, or property damage.
WARNING: Excessive Pr
essure Hazard
Volumetric Expansion
The heating of water and other fluids causes volumetric
expansion. The associated forces may cause failur
e of system components and release of high temperature fluids.
This will be prevented by installing properly sized and
located compression tanks and pressure relief valves.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
WARNING: Fall Objects Hazard
Eyebolts or lifting lugs, if provided, are for lifting only
the components to which they are attached. Failure to follow these instructions could result in serious personal
injury or death, or property damage.
If lifting of the entire pump is required, do so with slings placed
under the base rails as shown.
The best pump location for sound and vibration absorption is
on a concrete floor with subsoil underneath. If the pump location is overhead, special precautions should be undertaken to
reduce possible sound transmission, consult a sound specialist.
If the pump is not on a closed system, it should be placed as
near as possible to the source of the liquid supply, and located
to permit installation with the fewest number of bends or
elbows in the suction pipe.
COMPRESSION TANK
SHOULD BE LOCATED
ON THE SUCTION SIDE
OF THE PUMP
B&G REDUCING
VALVE
COLD
WATER
SUPPLY
FROM BOILER
CHILLER OR CONVER
TER
B&G ROLAIRTROL
AIR SEPARATOR
ISOLATION
VALVE
SUPPLY
TO SYSTEM
B&G CIRCUIT
SETTER
B&G TRIPLE DUTY
VALVE
The installation must be evaluated to determine that the Net
Positive Suction Head Available (NPSHA) meets or exceeds the
Net Positive Suction Head Required (NPSHR), as stated by the
pump performance curve.
IMPORTANT
Do not install and operate Bell & Gossett Pumps, 3D Valves,
Suction Diffusers, etc., in closed systems unless the system is
constructed with properly sized safety devices and control
devices. Such devices include the use of properly sized and
located pressure relief valves, compression tanks, pressure controls, temperature controls, and flow controls as appropriate. If
the system does not include these devices, consult the responsible engineer or architect before making pumps operational.
3
INSTALLATION
This pump is built to provide years of service if installed properly
and attached to a suitable foundation. A base of concrete weighing 21/2 times the weight of the pump is r
the shipping ticket for pump weight.)
If possible, tie the concrete pad in with the finished floor. Use
foundation bolts and larger pipe-sleeves to give room for final
bolt location. (See Figure 6A.)
ecommended. (Check
PIPE
SLEEVE
FOUNDATION
BOLT
LEVELING
Place the pump on its concrete foundation supporting it with
steel wedges or shims totaling 1" in thickness. These wedges
or shims should be put on both sides of each anchor-bolt to
provide a means of leveling the base. (See Figure 6B.)
It is very important that the pump-base be set level to avoid any
mechanical difficulties with the motor or pump. This pump was
properly aligned (if furnished with a motor) at the factory
. However, since all pump bases are flexible they may spring and twist
during shipment. Don’t pipe the pump until it is realigned. After
piping is completed and after the pump is grouted-in and bolteddown, align it again. It may be necessary to re-adjust the alignment from time to time while the unit and foundation are new.
GROUTING
After the pump has been leveled, securely bolted to the floor,
and properly aligned, a good grade of non-shrinking grout
should be poured inside the pump base. To hold wedges or
shims in place, allow the grout to flow around them.
ROTATION
The VSC & VSCS pump is available in both right- and left-hand
rotation. An arrow cast into the pump body shows the direction
of rotation.
BUILT-UP
CONCRETE FOUNDATION
ALLOW 1" FOR SHIMS.
PLACE ON BOTH SIDES
OF ANCHOR BOLTS.
APPROX.
GAP
1"
LEVELING OF PUMP BASE
ON CONCRETE FOUNDATION.
WASHER
NOTE:
TO KEEP SHIMS IN
PLACE ALLOW GROUT
TO FLOW AROUND
HOLD DOWN LUGS.
GROUT
CONCRETE
FOUNDATION
FIGURE 6A
GROUT ONLY TO
TOP OF BASE RAIL.
PUMP
BASE RAIL
FIGURE 6B
AMOUNT OF
PARALLEL
MISALIGNMENT
STRAIGHT EDGE
PARALLEL ALIGNMENT CHECK
DISTANCES ACROSS
COUPLER FLANGES
SHOULD BE EQUAL
(CHECK 4 PLACES)
ANGULAR ALIGNMENT CHECK
COUPLER ALIGNMENT
All alignment should be done by moving or shimming the motor
only. Adjustments in one direction may alter alignment in another.
Therefore, check alignment in all directions after a correction is
made. Black rubber inserts have different horsepower load
ratings than orange Hytrel sleeves. They should not be
interchanged.
WARNING: Unexpected Startup Hazard
Disconnect and lockout power before servicing.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
STANDARD SLEEVE TYPE COUPLER
WITH BLACK RUBBER INSERT
Before aligning the coupler, make sure there is about 1/8" end
clearance between the sleeve and the two coupler halves.
1. Check angular misalignment using a micrometer or caliper.
Measure from the outside of one flange to the outside of the
opposite flange at four points 90° apart. DO NOT ROTATE
COUPLER. Misalignment up to 1/64" per inch of coupler
radius is permissible.
2. At four points 90° apart (DO NOT ROTATE COUPLER), measure the parallel coupler misalignment by laying a straight
edge across one coupler half and measuring the gap
between the straight edge and opposite coupler half. Up to a
1
/64" gap is permissible.
4
FOR FINE ALIGNMENT, ORANGE HYTREL INSERTS,
3500 RPM OPERATION, OR ALL OTHER COUPLER TYPES
Use a dial indicator when greater alignment accuracy is required. Use the following alignment tolerances unless specified
otherwise by the coupler manufacturer. On sleeve type couplers
make sure there is about 1/8" end clearance between the sleeve
and the two coupler halves.
1. To check angular misalignment, mount the dial indicator
base to one coupler half, or shaft, and position the dial indicator button on the front or rear face of the opposite coupler
half. Set the dial to zero. Rotate both coupler halves together,
making sure the indicator button always indicates off the
same spot. Misalignment values within 0.004" TIR per inch of
coupler radius are permissible.
2. To check parallel misalignment, mount the dial indicator base
to one coupler half, of shaft, and position the dial indicator
button on the outside diameter of the opposite coupler half.
Set the dial to zero. Rotate both coupler halves together,
making sure the indicator button always indicates off the
same spot. Misalignment within 0.004" TIR is permissible.
PIPING
Always install a section of straight pipe between the suction
side of the pump and first elbow. This reduces turbulence of
the suction by straightening out the flow of liquid before it
enters the pump. The length should be equal to five times the
diameter of the suction pipe size.
Line up the piping so that the bolt-holes in the pump flanges
match the bolt-holes in the pipe flanges. DO NOT ATTEMPT
TO SPRING THE SUCTION OR DISCHARGE LINES INTO
POSITION. Coupling and bearing wear will result if suction or
discharge lines are forced into position. The code for Pressure
Piping (ANSI B.31.1) lists many types of supports available for
various applications.
When considerable temperature changes are anticipated,
equipment for absorbing expansion should be installed in the
system in such a way as to avoid strain on the pump.
When using an isolation base, flexible piping should also be
used on both suction and discharge sides of pump.
On an open-system with a suction-lift, use a foot-valve of equal
of greater area than the pump suction piping. Prevent clogging
by using a strainer at the suction inlet next to the foot-valve.
The strainer should have an area three times that of the suction
pipe with hole diameter of no less than 1/4".
The pipeline should have isolation valves around the pump and
have a drain valve in the suction pipe.
A Bell & Gossett Triple Duty Valve installed in the discharge line
will serve as a check valve to protect the pump from water
hammer, as a gate valve for servicing and for throttling.
PUMP INSULATION
When insulating a Series VSC/VSCS pump, ensure that the
grease fittings remain accessible and visible. Do not seal off the
drain holes in the bearing caps or bearing housings.
PRIMING AND STARTING
CAUTION: Seal Damage Hazard
Do not run pump dry, seal damage may occur.
Failure to follow these instructions could result in serious
property damage and/or moderate personal injury.
Before starting the pump, the pump body must be full of liquid.
Manual priming may be required if the system does not automatically fill the pump body with liquid. Vent plugs are provided
on the pump body to vent the air. While venting the air from the
pump body the pump shaft should be rotated a few times by
hand.
The pump should be started with the discharge valve closed
and the suction valve fully open. After the pump is up to operating speed the discharge valve should be opened slowly.
IMPORTANT: The pump should never be operated with the
suction valve closed or throttled. This could result in cavitation.
LUBRICATION
Lubricate pump bearings at least twice a year or flush bearings
whenever necessary with NLGI Grade No. 2 mineral base or
lithium base petroleum grease while the pump is running. On
chilled water applications it is important to keep the bearing
cavity full of grease to protect from condensation. Lubricate
motor bearings in accordance with the manufacturer’s instructions.
GENERAL INSTRUCTIONS
1. Keep this pump and motor properly lubricated.
2. Protect the motor against overload and low-voltage. Use a
motor-starter with proper size heater elements.
3. When there is danger of freezing, remove the plugs at the top
and bottom of the volute shell.
VSCS-S
VSCS-D
VSCS-PF
5
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