Bell & Gossett DN0153D User Manual
INSTRUCTION MANUAL
SERIES HV UNITS
25,000-60,000 SQ. FT/. EDR
DN0153
REVISION D
Hoffman Specialty
®
Vacuum Heating Units
Series HV™ (1,000-20,000 Sq. Ft. EDR)
SERIES HV UNITS
1,000 – 20,000 SQ. FT/. EDR
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.
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
EXPLOSIBLE
(2) All Units
DN0483 (Small) - DN0484 (Large)
INSTRUCTIONS COULD RESULT
IN SERIOUS INJURY OR DEATH.
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.).
®
WARNING
EXPLOSIBLE
ISOLATE TANK
DURING LEAK TEST
(2) All Units
DN0485 (Small)
DN0486 (Large)
HOFFMAN SPECIALTY
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
DN0116 Units with Panel
TM
Morton Grove, Illinois 60053
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 All Units
P70644
2
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 condensate 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 controls 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 requirements. 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 compartment, this float starts the pump and siphons the condensate to the upper chamber.
In operation the centrifugal pump circulates condensate from
the upper compartment thru the multi-jet nozzle creating multiple jets of water entering the venturi. These jets entrain air
and gasses creating a smooth steady vacuum in the lift manifold and in the condensate system. The air and gasses are
separated in the upper compartment and vented to atmosphere. 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 discharge 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
FIG. 2 SERIES HV VACUUM PRODUCER
HOFFMAN
®
Vacuum Heating Units
Series HVTM(1,000-20,000 Sq. Ft. EDR)
ITT Fluid Technology Corporation
Morton Grove, Illinois 60053
TM
TM
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
INSTRUCTION MANUAL
Installation, Operation, & Service Instructions
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.
DN0153
REVISION C
Hoffman
Hoffman Pump
®
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
SERIES HV UNITS
1,000 – 20,000 SQ. FT/. EDR
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.).
SOLENOID
DISCHARGE
AIR VENT
RECEIVER
INLET
MULTI-JET NOZZLES
VENTURI
DSK-1328
NOZZLE
BODY
CENTRIFUGAL PUMP
VALVE
3
Receivers are non-code cast iron.
PRELIMINARY INSPECTION
Assure that there is no shipping damage.
Assure that nameplate ratings agree with job specifications
and actual conditions.
HANDLING
Use care in installing unit.
LOCATION
Place unit for easy access to all parts. Allow adequate space
for servicing. Check ambient conditions.
NOTICE / TEMPERATURE LIMITS
Motors are designed to operate in 104°F max. ambient.
Insulate or ventilate as required.
PIPING (GENERAL)
Pipe the unit per the Elementary Piping Diagram. Locate and
support piping so as to not load the discharge valve.
PIPING (Vent)
Install a vent pipe to atmosphere. Pipe to be size of vent port
on unit. Do not restrict or reduce vent opening or exceed 20
feet vertical height unless an overflow connection is provided.
PRIMING PORT
Provide a priming port as shown on piping diagram.
FLOAT SWITCHES
Floats are locked in place to prevent damage during shipment.
Remove shipping locks. Check factory settings. Floats are
adjustable for various levels of operation.
See page 7 for detailed instructions.
EQUALIZING LINE
An equalizing line must be installed with all Series HV units.
This line must be installed to prevent formation of a vacuum
on the radiation side of the system when steam stops flowing
in the mains. This vacuum may be higher than return line vacuum, which would prevent condensate from flowing back to
the pump. To correct this in an unzoned system, install equalizer line as shown in the piping diagram. To correct this in a
zoned system, install equalizer line for each zoned section or
install a vacuum breaker on supply line on radiation side of
each zone control valve.
PIPING (Returns)
Gravity return lines from system must be properly pitched
down to unit inlet. Returns must also be trapped to prevent
steam entry into the unit. An inlet basket strainer is
recommended.
CAUTION: UNIT LIFTING EYE
Use unit lifting eyes only to lift unit as shipped from
factory. Unit must be empty and disconnected from pipes,
anchors and other restraints. Use proper rigging procedures. Failure to follow these instructions could result in
injury or property damage.
CAUTION: NOT A CHEMICAL PUMP
Inject boiler feed compounds from chemical feed
tank into boiler feed piping – never into condensate tank.
Failure to follow these instructions could result in injury or
property damage.
TO BOILER
FEED
SYSTEM
REDUCER
STRAINER
SERIES VLR DUPLEX
PIPING DIAGRAM
DRAIN
DRAIN
DRAIN
DV
PRIMING
OPENING
EQUALIZING LINE —
3
/4"
BOILER
FROM BOILER
FEED SYSTEM
— GATE VALVE
— DISCHARGE VALVE
DV
— STEAM OR PLUG COCK
— UNION
— CHECK VALVE
OPEN VENT ABOVE
BOILER WATER LINE
RETURN FROM
HEATING SYSTEM
EQUALIZING CONNECTIONS FOR ZONED SYSTEMS
FIG. 4
FIG. 3
WARNING: EXPLOSIBLE
Do not pressurize receiver. Isolate receiver during
leak test. Do not plug overflow. Do not restrict vent opening
to atmosphere. Open valves slowly. Failure to follow these
instructions could result in serious injury or death.
ZONE CONTROL
VALVE
STEAM MAIN
M
TO ZONE
RETURN MAIN
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