Bell & Gossett DN0162F User Manual
INSTRUCTION MANUAL
WARNING
DN0162
REVISION F
Hoffman Specialty
®
Vented Boiler Feed Units
Series HBF and VBF
Series HBF Model 50VBF-D
Duplex, 50 gallon receiver
Series VBF, Model 50VBF-S
Simplex, 50 gallon receiver
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.
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.
DURING LEAK TEST
If the decals as noted below are missing or are illegible contact 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. If pump, motor or piping are operating at extremely high or
low temperatures, guarding or insulation is required.
3. Operating personnel should be trained in the operation of
pumps and associated systems (condensate, boiler feed
units).
®
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
WARNING
EXPLOSIBLE
ISOLATE TANK
(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
P70644
DESCRIPTION
Boiler feed units are designed to pump water into an operating
boiler. The pumps are controlled by level controls on the boiler.
Boiler feed units are normally sized to accommodate system
surges and also to provide for the addition of fresh water as
required.
Series VBF and HBF units are standardized feed units intended
for application to low pressure boilers. Pump discharge pressures are 20 psi (1.4 bar), 25 psi (1.7 bar) and 30 psi (2 bar) depending upon model specified. Receivers are heavy gauge, noncode steel. HBF receivers are provided with the Hoffguard™
corrosion resistant coating for longer life.
Receivers are non-code steel.
PRELIMINARY INSPECTION
Assure that there is no shipping damage.
Assure that nameplate ratings agree with job specifications
and actual conditions.
Remove all plastic shipping plugs from receiver and pumps.
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 (40˚C) max. ambient.
Insulate or ventilate as required.
PIPING (General)
Pipe the unit per the above Piping Diagram. Locate and support piping so as to not load the pump discharge.
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.
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.
PIPING (Overflow)
Pipe overflow connection to drain. When condensate temperature exceeds 200˚F (93˚C) an overflow loop must be used.
PIPING (PUMP DISCHARGE)
Connect the pump discharge(s) to the boiler in accordance
with the above diagram. This piping must be coordinated with
electrical controls in the case of multiple pumps and multiple
boilers.
Boiler feed systems are supplied to meet a wide variety of system specifications. The electrical controls and piping systems
must be coordinated.
WATER MAKE-UP
A mechanical valve is furnished for water make-up. A “Y”
strainer is recommended ahead of this valve. See page 5 for
detailed information. The inlet water pressure must not exceed
30 psi (2.0 bar).
ELECTRICAL WIRING & CONTROLS
Connect power wiring per National Electrical Code. Recheck
nameplate vs. specifications and conditions. All single phase
motors have internal thermal protection.
All series VBF units are furnished with 115/230V 1 Phase,
60Hz motors. Factory motor wiring is for 115V. To convert
motor to 230 volt, follow motor manufacturers instructions.
CAUTION / NOT A CHEMICAL PUMP: Inject boiler
feed compounds from chemical feed tank into boiler
feed piping — never into boiler feed tank. Failure to follow these instructions could result in injury or property
damage.
WARNING / HIGH VOLTAGE ELECTRICITY: Dis-
connect and lock out power before connecting or
servicing unit. Failure to follow these instructions could
result in serious injury or death.
INSTALLATION AND DESCRIPTION (TYPICAL PIPING DIAGRAM)
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.
2
Pump
Discharge
SERIES VBF
SERIES HBF
Full Size Air Vent
To Atmosphere
Boiler Feed
Receiver
Basket Strainer
Overflow
(See Detail)
Condensate Return
From System
Gauge
Glass
Make-Up
Water
Supply
(See Note 1)
NOTE:
1. Inlet water pressure
should not exceed 30
psi (2.0 bar). For water
systems in excess of 30
psi (2.0 bar), use a Bell
& Gossett #6 Pressure
Reducing Valve, set at
30 psi (2.0 bar).
Boiler
Feed Pump
Receiver
Overflow Loop
To Drain
Vent
OVERFLOW LOOP DETAIL
Loop Fill
Syphon Breaker
Vent To Atmosphere
Vent
Loop Fill
To Drain
Overflow Loop
To Drain
Water
Make-Up
Inlet Strainer
Plug Cock
Gate Valve
Check Valve
Union
Y-Strainer
Return From
System
Mechanical
Make-Up Valve
To
Drain
3
PUTTING THE UNIT INTO SERVICE
1. Assure that the unit is piped in accordance with instructions on page 2.
2. Isolate tank before performing any system leak test. Do
not pressurize the tank as part of the leak test. Failure to
do this can result in serious injury or death.
3. Check power leads in accordance with wiring diagram (by
others).
4. Install drain plugs.
5. Fill receiver half full of water to prime pump(s) and prevent
possible damage to pump seals. Avoid freezing conditions
after unit receiver has been filled.
6. Throttle plug cock in discharge line until pressure at pump
(while pump is discharging) approaches pump rated pressure. Tighten plug nut to secure adjustment.
7. Connect the water make-up assembly to city water. Use
piping as least as large as the valve piping provided. A
manual fill valve is also recommended. If city water pressure exceeds 30 psi (2.0 bar), install pressure reducing
valve.
8. Boiler Level Controls — Assure that the controls on and
related to the boiler match the control systems provided
on the unit.
9. Check that the pump discharge pressure exceeds the
maximum operating pressure of the boiler.
10. Assure that the make-up valve admits water.
11. If possible, observe operation thru several cycles.
OPERATION AND MAINTENANCE
Operators must be familiar with all sections of this manual to
understand the operation of the unit.
Hot water, steam and electricity can be hazardous.
Check motor nameplate for any lubrication requirements.
Pumps require no lubrication.
NOTICE / AUTO RESTART
Single phase motors will restart automatically after thermal
overload protector trips.
A properly installed unit should function unattended for long
periods of time. Periodic checks to assure proper operation
are highly recommended. Refer to trouble shooting section
when necessary.
The inlet strainer (when furnished) is intended to protect the
pump and system. Periodic cleaning should be included in the
maintenance schedule. Check frequently in new systems.
WARNING / HIGH VOLTAGE: Disconnect and lock
out power before connecting or servicing unit.
Failure to follow these instructions could result in serious
injury or death.
WARNING / MAINTAIN BOILER SAFETY FEATURES:
When connecting the boiler feed unit to the
boiler, assure that all boiler safety controls (burner cutoff,
etc.) are and remain operational. With certain control
arrangements, dedicated boiler controllers are required
for the boiler feed pumps. Failure to follow these instructions could result in serious injury, death or extensive
property damage.
CAUTION / DO NOT RUN DRY. SEAL DAMAGE
MAY OCCUR:
Inspect pump seal regularly for
leaks. Replace as required. Failure to follow these
instructions could result in serious injury, death or extensive property damage.
WARNING / HIGH VOLTAGE: Disconnect and lock
out power before connecting or servicing unit.
Failure to follow these instructions could result in serious
injury or death.
WARNING / EXPLOSIBLE: The installed boiler feed
unit becomes an integral part of the boiler system.
Boiler operation and maintenance requires specific skills
and training and may require licensing or certification.
The boiler feed unit must be operated and maintained so
as not to jeopardize the boiler operation. Failure to follow
these instructions could result in serious injury, death or
extensive property damage.
SAFETY INSTRUCTIONS: SEE COVER OF THIS
MANUAL.
CAUTION / SUBSEQUENT DAMAGE: A unit show
ing symptoms of possible problems (overflow,
noise, leaks, vibrations, continual operation, etc.) must be
corrected immediately. Failure to follow this instruction
may result in full liability for subsequent injury or property
damage.
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.
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.
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