Bell-gossett DN0153D HS Vacuum Heating Units Series HV User Manual download pdf

INSTRUCTION MANUAL

DN0153

REVISION D

Hoffman Specialty

Vacuum Heating Units

Series HV

™

(1,000-20,000 Sq. Ft. EDR)

SERIES HV UNITS

25,000-60,000 SQ. FT/. EDR

Morton Grove, Illinois 60053

SERIES HV

MODEL

SERIAL

GPM PSI PUMP

CFM IN HG. PUMP

DWGS

POWER V. PH. HZ 60

CONTROL V. PH. 1 HZ 60

TOTAL LARGEST MOTOR

F.L. AMP F.L. AMP

DN0016

HOFFMAN SPECIALTY

INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.

SAFETY

INSTRUCTIONS

This safety alert symbol will be used in this manual and on

the unit safety instruction decals to draw attention to safety

related instructions. When used, the safety alert symbol

means ATTENTION! BECOME ALERT! YOUR SAFETY IS

INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS

MAY RESULT IN A SAFETY HAZARD.

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

EXPLOSIBLE

WARNING

DO NOT PRESSURIZE TANK.

ISOLATE TANK DURING LEAK TEST.

DO NOT RESTRICT VENT.

DO NOT PLUG OVERFLOW.

OPEN INLET VALVES SLOWLY.

DO NOT USE AS A FLASH TANK.

FAILURE TO FOLLOW

INSTRUCTIONS COULD RESULT

IN SERIOUS INJURY OR DEATH.

(2) All Units

DN0483 (Small) - DN0484 (Large)

DN0116 Units with Panel

P70644 All Units

EXPLOSIBLE

WARNING

ISOLATE TANK

DURING LEAK TEST

(2) All Units

DN0485 (Small)

DN0486 (Large)

If the decals as noted below are missing or are illegible con-

tact your local B&G representative for a replacement.

1. Electrical connections to be made by qualified Electrician in

accordance with all National, State and Local codes.

2. Motor must have properly sized starter with properly sized

heaters to provide overload and undervoltage protection.

3. If pump, motor or piping are operating at extremely high or

low temperatures, guarding or insulation is required.

4. Operating personnel should be trained in the operation of

pumps and associated systems (condensate, boiler feed, etc.).

DESCRIPTION AND INSTALLATION

The Series HV vacuum heating units are designed to serve the

dual purpose of pumping accumulated condensate back to

the boiler feed tank and maintaining vacuum in the conden-

sate system. This vacuum will draw air out of the system

on start-up and facilitate the flow of steam thru the heating

system.

One pump/vacuum producer/discharge valve assembly con-

trols both the condensate discharge and the production of

vacuum. Two pump (duplex) units have a second assembly for

backup and to provide extra capacity to handle peak loads.

Various electrical controls are offered to meet system require-

ments. These controls are normally supplied as part of the

assembled unit and a wiring diagram is furnished with the unit.

Refer to this electrical diagram as required.

The units respond to both changing condensate levels and

system vacuum requirements. The Series HV units feature a

low inlet height and therefore have a second float (in the lower

compartment). As condensate accumulates in the lower com-

partment, this float starts the pump and siphons the conden-

sate to the upper chamber.

In operation the centrifugal pump circulates condensate from

the upper compartment thru the multi-jet nozzle creating mul-

tiple jets of water entering the venturi. These jets entrain air

and gasses creating a smooth steady vacuum in the lift mani-

fold and in the condensate system. The air and gasses are

separated in the upper compartment and vented to atmos-

phere. See Figure 1.

Low system vacuum or high water in the upper compartment

or high water in the lower compartment will start the pump to

create vacuum and transfer water to the upper tank. High

water level in the upper compartment will also cause the dis-

charge valve to open.

When the vacuum and float switches have been satisfied and

the pump stops, the check valve in the lift manifold closes,

preventing the return of air and water to the system.

The solenoid operated discharge valve is opened in response

to the condensate level float switch in the upper compartment.

Controlled opening of the discharge valve holds sufficient

back pressure in the nozzle body that the vacuum producer

continues to function even when discharging condensate

(simultaneous rating).

NOZZLE BODY

MULTI-JET NOZZLE

VENTURI

PUMP SUCTION

SOLENOID OPERATED

DISCHARGE VALVE

DISCHARGE

LIFT MANIFOLD

CHECK VALVE

CENTRIFUGAL PUMP

LOWER COMPARTMENT FLOAT SWITCH

UPPER COMPARTMENT FLOAT SWITCH

STRAINER

LOW INLET

VACUUM GAUGE

VACUUM BREAKER

VACUUM SWITCH

AIR VENT

FIG. 1 CUT-AWAY VIEW OF SINGLE SERIES HV SINGLE UNIT: TYPICAL OF ALL SINGLE AND DUPLEX MODELS

AIR VENT

RECEIVER

INLET

MULTI-JET NOZZLES

VENTURI

NOZZLE

BODY

CENTRIFUGAL PUMP

DSK-1328

SOLENOID

DISCHARGE

VALVE

FIG. 2 SERIES HV VACUUM PRODUCER

SERIES HV UNITS

1,000 – 20,000 SQ. FT/. EDR

1 2 3 4 5 6 7 8 9 10

Summary of Contents

Page 1 - (1,000-20,000 Sq. Ft. EDR)

INSTRUCTION MANUAL DN0153 REVISION DHoffman Specialty®Vacuum Heating UnitsSeries HV™ (1,000-20,000 Sq. Ft. EDR)SERIES HV UNITS25,000-60,000 SQ. FT/.

Page 2 - (1,000-20,000 Sq. Ft. EDR)

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

Page 3 - PIPING DIAGRAM

2DESCRIPTION AND INSTALLATIONThe Series HV vacuum heating units are designed to serve thedual purpose of pumping accumulated condensate back tothe boi

Page 4

4Install gate valve in return line for testing pump shut off vacu-um, closing off hot returns when cleaning strainer, etc. Do notinstall check valve i

Page 5 - (ON REAR OF STRAINER)

4Install gate valve in return line for testing pump shut off vacu-um, closing off hot returns when cleaning strainer, etc. Do notinstall check valve i

Page 6

OPERATION AND MAINTENANCEOperators must be familiar with all sections of this manual tounderstand the operation of the unit.Hot water, steam and elect

Page 7 - 4" in gauge glass

OPERATION AND MAINTENANCEOperators must be familiar with all sections of this manual tounderstand the operation of the unit.Hot water, steam and elect

Page 8

(3) Place motor vertically with pump end up. Do notattempt assembly of seal and impeller with shafthorizontal.(4) The “carbon” of rotating part of sea

Page 9 - Hoffman Pump

(3) Place motor vertically with pump end up. Do notattempt assembly of seal and impeller with shafthorizontal.(4) The “carbon” of rotating part of sea

Page 10 - HOFFMAN SPECIALTY

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Bell-gossett DN0153D HS Vacuum Heating Units Series HV User Manual

Browse online or download User Manual for Pumps Bell-gossett DN0153D HS Vacuum Heating Units Series HV. Bell & Gossett DN0153D HS Vacuum Heating Units Series HV User Manual

Summary of Contents

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