Related Manuals for Xylem Bell & Gossett Domestic VL Series
Summary of Contents for Xylem Bell & Gossett Domestic VL Series
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Page 2: Installation
STRAINER VACUUM GAGE CONTROL PANEL CHECK VALVE VENTURI SOLENOID DISCHARGE VALVE AIR VENT VALVE DISCHARGE FLOAT SWITCH DISCHARGE MANIFOLD MULTI-JET NOZZLE CENTRIFUGAL PUMP MOUNTING PADS FOR DUPLEX CENTRIFUGAL PUMPS RECEIVER DSK-1330 FIG. 1 SERIES VL VACUUM UNITS 25,000-60,000 EDR DESCRIPTION AND INSTALLATION The Series VL vacuum heating units are designed to serve the... - Page 3 EQUALIZING LINE – " OPEN VENT ABOVE BOILER WATER LINE RETURN FROM AIR VENT HEATING SYSTEM DISCHARGE VALVES BOILER INLET STRAINER PRIMING OPENING TO DRAIN DRAIN TO DRAIN FROM BOILER FEED SYSTEM – CHECK VALVE – GATE VALVE – STEAM OR PLUG COCK CENTRIFUGAL PUMPS –...
- Page 4 PIPING (Returns) DISCHARGE LINE Gravity return lines from system must be properly pitched down Install union, check valve, steam cock and gate valve at unit in to unit inlet. Returns must also be trapped to prevent steam each discharge line. Steam cock to be adjusted to cause pump entry into the unit.
- Page 5 SPECIAL PIPING ARRANGEMENTS FOR LOW RETURNS (IF LIFT EXCEEDS 5 FEET, A MECHANICAL LIFT IS RECOMMENDED)
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Page 6: Operation And Maintenance
OPERATION AND MAINTENANCE The inlet strainer (when furnished) is intended to protect the pump and system. Periodic cleaning should be included in the Operators must be familiar with all sections of this manual to maintenance schedule. Check frequently in new systems. understand the operation of the unit. - Page 7 FLOAT SWITCH ADJUSTMENT PROCEDURES PROPER ADJUSTMENT OF CONTROLS RESULTS Close the inlet gate valve and, with the discharge line open, IN MINIMUM CONDENSATE IN RECEIVER operate the pump on “continuous” or “hand” to remove sufficient water to lower the level to about the 7 inch level in the water level gauge glass measured from the top of the lower gauge cock.
- Page 8 Place motor vertically with pump end up. Do not attempt 13. Replace impeller on shaft. Replace stainless steel washer assembly of seal and impeller with shaft horizontal. and secure impeller with capscrew or cap nut. 14. Place new gasket on pump volute and reassemble motor and pump subassembly on pump volute.
- Page 9 VACUUM PUMP RUNS CONTINUOUSLY OR FAILS TO (2) If the nearest “dry” point on the return main is more than PRODUCE SUFFICIENT VACUUM* 2 ft. above the vacuum switch, relocate and reconnect Selector switch is set on “continuous” or “hand”. the switches to sense the vacuum at this point.
- Page 10 Morton Grove, Illinois 60053 Xylem Inc. 8200 N. Austin Avenue Morton Grove, Illinois 60053 Phone: (847) 966-3700 Fax: (847) 965-8379 www.bellgossett.com Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries. © 2018 Xylem Inc. DN0135E February 2018...