Xylem P81630E User Manual

INSTRUCTION MANUAL
P81630
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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