Bell-gossett DN0136C Domestic Pump Vacuum Heating Units Series User Manual

INSTRUCTION MANUAL DN0136 REVISION CDomestic® PumpVacuum Heating UnitsSeries VCD™ and VCL™INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.Mo

10Closed coupled centrifugal pumps are designed for years of trou-ble free service. Units have mechanical shaft seals.1. Close inlet line gate valve a

TROUBLESHOOTING PROCEDURES – VACUUM PRODUCERAll units are thoroughly tested at the factory before shipment.They should operate satisfactorily without

Xylem Inc. 8200 N. Austin Avenue Morton Grove, Illinois 60053 Phone: (847) 966-3700 Fax: (847) 965-8379www.xyleminc.com/brands/bellgossettBell & G

2DESCRIPTIONThe Series VCD and Series VCL vacuum heating units aredesigned to serve the dual purpose of pumping accumulatedcondensate back to the boil

PIPING (Returns)Gravity return lines from system must be properly pitched downto unit inlet. Returns must also be trapped to prevent steamentry into t

SEQUENCE OF OPERATIONThere are two separate and independent cycles of operationin the VCD design – one of air evacuation and the other forcondensate r

5SPECIAL PIPING ARRANGEMENTS FOR LOW RETURNS(IF LIFT EXCEEDS 5 FEET, A MECHANICAL LIFT IS RECOMMENDED)

6PUTTING THE CONDENSATE PUMPS INTO SERVICE1. Assure that the unit is piped in accordance with instructionsand diagrams.Confirm that incoming power agr

FLOAT SWITCH SETTINGSFloat switches and mechanical alternators are factory adjusted andtested for proper operation. Shipping brackets on these switche

8The switch which controls the hurling water makeup valve islocated inside the float housing near the vacuum unit overflow.The switch is under a trian

9These closed coupled vertical centrifugal pumps are equippedwith mechanical seals. If system has not been properly cleanedprior to installation of pu