FULTON VSRT Series User manual

INSTALLATION,
OPERATION, AND
MAINTENANCE MANUAL
VSRT Series
Vertical Spiral-Rib Tubeless Boiler
9.5 HP - 250 HP
Serial/ National
Board Number
Model
Fulton Order
Owner
Site Name
Date
VSRT-IOM-2022-0728
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Questions? Please Contact Your Local Manufacturer’s Representative
VSRT-IOM-2022-0728 TABLE OF CONTENTS
0-1
Introduction 1-1
Overview .............................................................................................................. 1-2
Receiving Inspection............................................................................................ 1-3
Warnings & Cautions............................................................................................ 1-3
Disclaimers and Local Codes ................................................................................ 1-6
Installation 2-1
Product Overview................................................................................................. 2-2
Massachusetts Installations................................................................................. 2-2
Placement & Rigging........................................................................................... 2-2
Clearances and Serviceability .............................................................................. 2-3
EquipmentVentilation & Combustion Air Requirements.................................. 2-30
Combustion Air Filter (VSRT 9.5, 80–250 BHP Only)......................................... 2-31
Gas Supply.......................................................................................................... 2-31
INLET GAS PRESSURE................................................................................................................331
LINE GAS PRESSURE REGULATION............................................................................................331
GAS PIPING INSTALLATION .......................................................................................................332
MULTIPLE BOILER INSTALLATION.............................................................................................333
Electrical Connections and Devices.................................................................... 2-33
Water Chemistry ................................................................................................ 2-35
Steam Outlet...................................................................................................... 2-35
Water Supply...................................................................................................... 2-36
GLOSSARY OFWATER SUPPLYTERMS ......................................................................................237
Piping Specications.......................................................................................... 2-38
Insulation ........................................................................................................... 2-42
System Interfaces............................................................................................... 2-42
FEEDWATER TANK......................................................................................................................242
The Feed Water Piping ....................................................................................... 2-42
BLOWDOWNTANK.....................................................................................................................242
THE BLOW OFF VALVES..............................................................................................................243
STEAM SAFETY VALVES .............................................................................................................243
STEAM PRESSURE GAUGE ASSEMBLY ......................................................................................244
THEWATER COLUMN AND WATER GAUGE GLASS....................................................................244
Stack & Flue Connections................................................................................... 2-45
VentingTerminations......................................................................................... 2-46
ROOFTERMINATIONS................................................................................................................246
SIDEWALL VENT TERMINATIONS..............................................................................................249
System PipingTesting ........................................................................................ 2-49
Assembly of Fulton Multi-Skid Engineered Systems ......................................... 2-49
Before LeavingThe Installation.......................................................................... 2-54
Operation 3-1
Start-Up Preparation & Installation Review ........................................................ 3-2
Start-Up Service................................................................................................... 3-2
Prepare for Initial Start-Up................................................................................... 3-3
Perform Boil-Out.................................................................................................. 3-3
BOIL OUT PROCEDURE.................................................................................................................33
Sequences of Operation: Gas Fired Burners......................................................... 3-4
SEQUENCE OF OPERATION: MODULATED BURNER....................................................................34
Flame Programmers ............................................................................................ 3-5
FLAME SAFEGUARD CONTROL....................................................................................................35
Siemans Linkageless Modulation........................................................................ 3-5
Siemans LMV3 Controller Navigation.................................................................. 3-5
CommissioningThe Unit...................................................................................... 3-7
ADJUSTINGTHE PROFILE.............................................................................................................37
Operating Controls ............................................................................................... 3-9
Burner Settings .................................................................................................... 3-9
Pressure Modulation Controller ........................................................................... 3-9
For All Models..................................................................................................... 3-11
FLAME PROGRAMMER..............................................................................................................311
AIR SWITCH SAFETY ..................................................................................................................311
BLOWER MOTOR STARTER.........................................................................................................312
PUMP MOTOR STARTER.............................................................................................................312
LOW WATER CUTOFF................................................................................................................312
PRIMARY LOW WATER CUTOFF ...............................................................................................312
SECONDARY LOW WATER CUTOFF...........................................................................................313
HIGH LIMIT PRESSURE SWITCH ................................................................................................313
OPERATING PRESSURE LIMIT SWITCH......................................................................................313
FLAME SCANNER.......................................................................................................................313
MODULATING CONTROLS..........................................................................................................314
PRESSURE RELIEFVALVE...........................................................................................................314
SIGHT GLASS ISOLATIONVALVES..............................................................................................314
Cycle Testing ....................................................................................................... 3-14
Daily Start-Up..................................................................................................... 3-14
Daily Shut-Down................................................................................................ 3-14
Maintenance & Troubleshooting 4-1
Procedure for CleaningWater Probes................................................................... 4-2
Flame Scanner Adjustment for Fulton Gas Fired Steam Boilers .......................... 4-4
Recommended Daily Maintenance Schedule...................................................... 4-4
RecommendedWeekly Maintenance Schedule.................................................. 4-5
Recommended Monthly Maintenance Schedule................................................ 4-5
BURNER COMPONENTS...............................................................................................................46
Replacing the Combustion Air Inlet Filter (VSRT-9.5, 80-250 HP)....................... 4-6
Recommended Semi-Annual Maintenance Schedule......................................... 4-6
INSPECTION AND MAINTENANCE OFTHE PILOT ASSEMBLY.....................................................48
INSPECTION/CLEANING OF THE BURNER ASSEMBLY FORVSRT 9.580 BHP............................49

© Fulton Group N.A., 2022
TABLE OF CONTENTS VSRT-IOM-2022-0728
0-2
INSPECTION/CLEANING OF THE BURNER ASSEMBLY FORVSRT 100250 BHP.........................49
EXAMINETHEVENTING SYSTEM...............................................................................................412
Recommended Annual Maintenance................................................................ 4-12
After All Repairs.................................................................................................. 4-12
Troubleshooting................................................................................................. 4-13
Service Documents 5-1
Start-Up: Installation & Operation Report for Fulton Steam Boilers ................... 5-2
Vertical Steam Boiler Annual Maintenance Checklist........................................ 5-11
Notes .................................................................................................................. 5-13

Questions? Please Contact Your Local Manufacturer’s Representative 1-1
INTRODUCTION
INTRODUCTION
1
INSTALLATION 2
OPERATION 3
MAINTENANCE & TROUBLESHOOTING 4
SERVICE DOCUMENTS 5

© The Fulton Companies 2022
INTRODUCTION VSRT-IOM-2022-0728 SECTION 1
1-2
Overview
Prior to shipment, the following inspections and tests are made to ensure
the highest standards of manufacturing for our customers:
Material inspections
Manufacturing process inspections
American Society of Mechanical Engineers (ASME) welding inspection
ASME hydrostatic test inspection
Electrical components inspection
Operating test
Final engineering inspection
Crating inspection
This manual is provided as a guide to the correct operation and maintenance
of your Fulton equipment, and should be read in its entirety and be made
permanently available to the sta responsible for the operation of the boiler. It
should not, however, be considered as a complete code of practice, nor should it
replace existing codes or standards which may be applicable. Fulton reserves the
right to change any part of this installation, operation and maintenance manual.
Installation, start-up, and maintenance of this equipment can be hazardous and
requires trained, qualied installers and service personnel. Trained personnel
are responsible for the installation, operation, and maintenance of this
product, and for the safety assurance of installation, operation, and
maintenance processes. Do not install, operate, service or repair any
component of this equipment unless you are qualied and fully understand
all requirements and procedures. Trained personnel refers to those who
have completed Fulton Service School training specic to this product.
When working on this equipment, observe all warnings, cautions, and notes
in literature, on stickers and labels, and any additional safety precautions that
apply. Follow all safety codes and wear appropriate safety protection. Follow all
jurisdictional codes and consult any jurisdictional authorities prior to installation.
! WARNING
Do not operate, or allow others to operate,
service or repair this equipment unless
you (they) fully understand all applicable
sections of this manual and are qualied
to operate/maintain the equipment.
This boiler is equipped with an ignition
device, which automatically lights the
burner. Do not try to light the burner by
hand.
Prior to the commencement of any work
requiring the removal of cover plates and
the opening of the control panel box, the
electrical supply to the boiler must be
disconnected.
Assure all electrical connections are
powered down prior to attempting
replacement or service of electrical
components or connections of the
equipment.
Label all wires prior to disconnecting when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Operating the equipment beyond
its design limits can damage the
equipment and can also be dangerous.
Do not operate the equipment outside
its limits. Do not try to upgrade the
equipment performance by unapproved
modications. Unapproved modications
can cause injury and damage.
Contact your Fulton Representative before
modifying the equipment.
Defective equipment can injure you
or others. Do not operate equipment
which is defective or has missing parts.
Make sure all repairs or maintenance
procedures are completed before using
the equipment. Do not attempt repairs or
any other maintenance work you do not
understand.
Never attempt to operate equipment that
has failed to pass all the safety checks.
Please read these instructions and save for
reference.

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 1 VSRT-IOM-2022-0728 INTRODUCTION
1-3
Receiving Inspection
The customer should examine the equipment for any damage. It is the
responsibility of the installer to ensure all parts supplied with the equipment are
tted in a correct and safe manner.
Warnings & Cautions
WARNINGS and CAUTIONS appear in various chapters of this manual. It is critical
that all personnel read and adhere to all information contained in WARNINGS and
CAUTIONS.
WARNINGS must be observed to prevent serious injury or death to
personnel.
CAUTIONS must be observed to prevent damage or destruction of
equipment or loss of operating eectiveness.
All Warnings and Cautions are for reference and guidance purposes, and
do not substitute for required professional training, conduct, and strict
adherence to applicable jurisdictional/professional codes or regulations.
In addition, there are bolded Notes throughout the manual, which are included
as additional information for essential and eective operation and conditions.
! WARNING
After checking controls by manual
adjustment, always ensure they are reset
to their proper settings.
Follow proper lockout/tagout procedures
for the electrical, gas and water
connections.
If any “Manual Reset” limit device trips,
DO NOT reset without determining and
correcting the cause. (Manual Reset Limits
may include: ame safeguard, high or low
gas pressure, high temperature limit, high
pressure limit.)
Never tamper with low water (liquid level)
cuto sensors or circuitry.
Before commissioning the equipment,
verify with authorized personnel that gas
lines have been purged.
Check daily that the equipment area is free
and clear of any combustible materials,
including ammable vapors & liquids.
WHAT TO DO IF YOU SMELL GAS:
• Do not use matches, candles, ame or
other sources of ignition to check for gas
leaks.
• Do not try to light the appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from
a safe location.
• Follow the gas supplier’s instructions. If
you cannot reach your gas supplier, call
the re department.
A qualied installer, service agency or the
gas supplier must perform installation and
service on the fuel delivery system.

© The Fulton Companies 2022
INTRODUCTION VSRT-IOM-2022-0728 SECTION 1
1-4
! WARNING
Do not store or use gasoline or other
ammable vapors and liquids or corrosive
materials in the vicinity of this or any
other appliances. Cements for plastic
pipe should be kept away from all sources
of ignition. Proper ventilation should be
maintained to reduce the hazard and to
minimize breathing of cement vapors.
No shuto of any kind shall be placed
between the safety relief valve and the
equipment or in the discharge pipe
between such valve and the atmosphere.
Doing so can cause an accidental
explosion from overpressure.
The discharge from the safety relief valve
shall be so arranged that there will be no
danger of scalding personnel or damage
to equipment. Provisions should be
made to properly drain safety relief valve
discharge piping.
Fluids under pressure may cause injury to
personnel or damage to equipment when
released. Be sure to shut o all incoming
and outgoing uid shuto valves and
carefully decrease all trapped pressures to
zero before performing any maintenance.
Do not attempt to start the equipment for
any testing prior to lling and purging the
vessel. A dry re will seriously damage
the equipment and may result in property
damage or personnel injury and is not
covered by warranty. In case of a dry
ring event, shut o the fuel supply
and allow the vessel to cool to room
temperature before uid is reintroduced
to the pressure vessel. The boiler should
be inspected by a qualied individual
prior to commissioning the unit.
When opening any drains on the
equipment or piping system, steps should
be taken to avoid scalding/burning of
personnel due to hot uids. Whenever
possible, the system should be cooled prior
to opening any drains.
Post these instructions in an appropriate
place near the equipment and maintain in
good legible condition.
! WARNING
Boiler blowdown water must be cooled to <140˚F (60˚C) prior to discharge to a drain,
or as required per local jurisdictional codes. Failure to use an approved blow o
vessel with adequate cooling could cause personnel/equipment damage.
Improper installation or maintenance of gauge glass and connections can
cause immediate or delayed breakage resulting in bodily injury and/or property
damage. Only properly trained personnel should install and maintain gauge glass
connections. Wear safety glasses during installation. Be sure all parts are free of
chips and debris.
4 CAUTION
Where an atmospheric feedwater tank is to be installed, this should: 1) Be vented to a safe
location; 2) Have capacity sucient to satisfy boiler consumption, as well as maintain
proper return tank temperature; 3) Vent pipe should not be downsized, as it may caused
pressure build up in the tank; 4) Return pipes must not be insulated as this can cause
overheating in the feedwater tank and potential vapor lock in the pump. Return pipes
should be shielded to prevent burn hazard.
Gauge glass valves need to be fully open during boiler operation to prevent boiler
damage in case of gauge glass failure.
After installation is complete and prior to operation, the pressure vessel should be cleaned
or boiled out per instructions in this manual.

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 1 VSRT-IOM-2022-0728 INTRODUCTION
1-5
! WARNING
The vent line connection on the
gas pressure regulator must be
piped to outdoor air by the installer
in accordance with the National
Fuel Gas Code, American National
Standards Institute (ANSI) Z2231991
or latest addenda. In Canada, gas
installations must be in accordance
with the current CAN/Compressed
Gas Association (CGA) B149.1 and 2
and/or local codes.
Hot surfaces (over 120 F [49 C])
should be insulated or shielded for
safety. See Installation section.
Use only your hand to turn valve
handles. Never use tools. If the
handle will not turn by hand, don’t
try to repair. Forced or attempted
repair may result in re or explosion.
Should overheating occur or the gas
supply fails to shut o, manually
shut o the gas supply external to
the equipment.
For reasons of safety, the hot
exhaust gas duct and chimney must
be insulated or shielded within the
locality of the heater in compliance
with local codes and regulations.
Check daily that the boiler area is
free and clear of any combustible
materials, including ammable
vapors and liquids.
Do not use matches, candles, ame
or other sources of ignition to check
for gas leaks.
These instructions must not be
considered as a complete code of
practice nor should they replace
existing codes or standards which
may be applicable.
! WARNING
Commissioning/Start up by a non-
Fulton authorized person will void
the product warranty.
To ensure that your Fulton
equipment is operating safely and
eciently, follow the maintenance
procedures set forth in this manual.
SAFETY COMPONENTS: The end
user of the boiler must maintain all
labels on the boiler in clean, legible
condition. All connections and
safety devices, both mechanical and
electrical, must be kept clean, with
ease of access for inspection, use
and maintenance.
4 CAUTION
Maintenance procedures for this
equipment should be completed
by trained personnel. Appropriate
training and instruction are available
from the Fulton Service Department
at [phone] or your local Fulton
Representative.
When calculating ventilation
requirements, heat losses from
the Fulton equipment (and other
equipment) should be considered.
The stack arrangement and draft
conditions should be in accordance
with the information in this manual
for proper performance of the
equipment.
A competent rigger experienced in
handling heavy equipment should
handle rigging your equipment into
position.
4 CAUTION
Competent personnel in accordance
with all applicable local codes should
carry out the installation of the
Fulton equipment. “Factory-Trained
Personnel” refers to someone who
has attended a Fulton Service School
specically for the equipment covered
in this manual.
All state and jurisdictional codes
beyond the scope of the applicable
ASME Boiler and Pressure Vessel
Codes, for its corresponding
classication, should be followed in
all cases. Jurisdictional authorities
must be consulted prior to
installation.
The equipment must be installed on a
non-combustible surface.
4 CAUTION
Some soap used for leak testing is
corrosive to certain types of metals.
Clean all piping thoroughly after
completing the leak check.
A temperature exceeding 120°F
(49°C)* in the boiler room may
cause premature failure of electrical
components. Provisions should
be made to maintain an ambient
temperature of 120°F (49°C)*
or less (the panel box interior
should not exceed 125°F [52°C]*).
*Pumps, Programmable Logic
Controllers (PLC) or ModSync
panels may require lower ambient
temperatures or additional
cooling.

© The Fulton Companies 2022
INTRODUCTION VSRT-IOM-2022-0728 SECTION 1
1-6
4 CAUTION
Particulate matter or chemicals (example: perchlorethylene,
chlorine, or halogenated compounds) in the combustion air supply
to the boiler will cause damage or failure to the burner and is not
covered under warranty. Airborne materials from construction and
maintenance activities constitute a high-risk situation.
An exhaust fan may draw products of combustion into the work
environment creating a possible hazard to personnel.
Never leave an opened manual air vent unattended. In the event
an opened vent is left unattended, water or uid damage could
occur. The exception to this warning is a feed water deaerator
manual vent cracked open may be left unattended.
Do not use this equipment if any part has been under water (or
subjected to heavy rains/water if the equipment does not have
National Electrical Manufacturers Association (NEMA) 4 wiring,
controls and instrumentation). Immediately call a qualied
service technician to inspect the equipment and to replace any
part of the control system and/or gas control(s) which have been
under water.
For all systems containing boilers or unred steam generators,
the water chemistry in the boiler must be kept within the limits
outlined in this manual. Failure to do so may cause premature
pressure vessel failure and poor steam quality and will void the
warranty.
4 CAUTION
Do not use the equipment as support for ducted air piping.
Ducted piping must be supported independently of the
equipment.
Do not run the pump dry. Irreparable damage to the seal can
result. Prime the pump in accordance with the manufacturer’s
instructions. Never operate the pump with a closed discharge
valve.
After adjusting components in the fuel or air delivery system
combustion/emissions must be veried throughout the ring
range. If emissions are improper, adjust combustion following
the appropriate procedure in this manual.
Should you suspect that the boilers ue passage ways have
become blocked, contact your authorized Fulton representative.
Disclaimers and Local Codes
Installation of the equipment shall conform to all the
requirements or all national, state and local codes
established by the authorities having jurisdiction or, in the
absence of such requirements, in the US to the National
Fuel Gas Code ANSI Z2231/National Fire Protection
Association (NFPA) 54 latest edition, and the specic
instructions in this manual. Authorities having jurisdiction
should be consulted prior to installation.
When required by local codes, the installation must
conform to the ASME Safety Code for Controls and Safety
Devices for Automatically Fired Boilers (ASME
CSD-1).
The standard boiler is manufactured and stamped in
accordance with ASME Boiler and Pressure Vessel Code,
Section I for a maximum working pressure of 150 psig for
the VSRT 10-250 and 100 psig for the VSRT-9.5, or ASME
Boiler and Pressure Vessel Code, Section IV for a maximum
working pressure of 15 psig for the VSRT 10-250.

Questions? Please Contact Your Local Manufacturer’s Representative 2-1
INSTALLATION
INTRODUCTION
1
INSTALLATION
2
OPERATION 3
MAINTENANCE & TROUBLESHOOTING 4
SERVICE DOCUMENTS 5

© Fulton Group N.A., Inc. 2022
2-2
INSTALLATION VSRT-IOM-2022-0728 SECTION 2
Product Overview
Prior to the installation, operation, or maintenance procedures, personnel should
become familiar with the equipment and its components. Please read this entire
manual before beginning any installation, operation or maintenance procedures.
If any questions arise, contact Fulton before proceeding. The information
contained in this installation, operation and maintenance manual is subject to
change due to continuous product improvement. Additionally, these instructions
should be regarded as a general guide and must not be considered as a complete
code of practice. This manual does not replace existing codes or standards which
may be applicable.
Massachusetts Installations
Boilers installed in Massachusetts must have the following:
A gas pressure regulator installed upstream of the gas train provided by
the manufacturer or installing contractor.
Two safety shuto valves, in series, one of which is of the type
incorporating a valve seal overtravel interlock when the maximum ring
rate per combustion chamber exceeds 5,000,000 BTU/hour..
Placement & Rigging
Adhere to the following for placement and rigging:
1. Check building specications for permissible oor loading. Use Table 3 for
unit reference.
2. Conform to all the requirements of all national, state and local codes
established by the authorities having jurisdiction and/or the U.S. to the
National Fuel Gas Code, latest edition. Authorities having jurisdiction
should be consulted before installations are made. Where required by local
codes, the installation must conform to American Society of Mechanical
Engineers Safety Code for Controls and Safety Devices for Automatically
Fired Boilers (ASME CSD-1).
3. Since an external electrical source is utilized, the boiler, when installed,
must be electrically ground in accordance with the National Electric Code,
American National Standards Institute (ANSI) National Fire Protection
Association (NFPA) 70, latest edition.
4. The boiler is designed for room temperatures above 32°F (0°C) and not
exceeding 120°F (48.9°C).
5. Install so that all system components are protected from water (dripping,
spraying, rain, etc.) and debris (dry wall dust, insulation particles, etc.)
during boiler operation and service.
! WARNING
Competent personnel in accordance with
all applicable local codes should carry out
the placement and rigging of the Fulton
equipment. All state and jurisdictional
codes beyond the scope of the applicable
ASME Boiler and Pressure Vessel Codes,
for its corresponding classication, should
be followed in all cases. Jurisdictional
authorities must be consulted prior to
installation.
! WARNING
Failure to provide required and safe
access to the equipment could impede
commissioning and maintenance.
Service technicians are instructed not to
commence commissioning if hazardous
conditions exist.
SAFETY COMPONENTS: The end user of the
boiler must maintain all labels on the boiler
in clean, legible condition. All connections
and safety devices, both mechanical
and electrical, must be kept clean, with
ease of access for inspection, use and
maintenance.

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 2 VSRT-IOM-2022-0728 INSTALLATION
2-3
6. Install on a level, non-combustible surface. Concrete or
steel is recommended. The surface must be elevated
a minimum of 4”(102 mm) above the oor. The use of
shims may be required to ensure the boiler is level. Do
not install the boiler on springs.
7. VSRT 9.5-125 Vertical Tubeless Boilers may be shipped
vertically or horizontally and are crated for forklift
transport. Once uncrated (and raised to vertical for
horizontally shipped boilers), transport unit by forklift
or lifting lugs at the top of the boiler. If means of lifting
are not available, rollers should be placed beneath the
frame of the equipment and it should be guided to
the installation location. All units can be moved with
forklifts. Refer to Table 3 for standard weights.
8. VSRT-250 Boiler will be shipped in two pieces
vertically. The pressure vessel should be rigged using
the lifting eye on top of the vessel. The nal assembly
skid should be rigged using a forklift.
9. Never allow weight to bear on the jacket, control panel,
trim, burner, fuel train or fan housing of any Fulton
boiler. Use only lifting eyes or fork holes for movement.
10. Locate the boiler so that the combustion air supply
and exhaust piping between the boiler and outside
wall/roof are within the draft pressure requirements
for horizontal or vertical venting. See Clearances and
Serviceability section of this manual.
11. Place equipment in a well ventilated room. See
Equipment Ventilation & Combustion Air
Requirements section of this manual.
12. Ensure there is adequate clearance around the unit
to provide access for operators and maintenance
personnel to access all parts of the equipment per local
jurisdictional requirements. Ensure also that clearance
provides for component removal for maintenance. The
service engineer or the operator should not have to
pass exposed, hot pipe work to make adjustments to
the boiler. See Clearances & Serviceability section of
this manual.
Clearances & Serviceability
All local and national codes (NFPA, ANSI, UL, CSA, ASME) must
be followed for proper clearances and serviceability of your
boiler. Authorities having jurisdiction should be consulted
before installations are made.
Appropriate front, back, side and top clearances must be
maintained (Table 1) to allow access around the equipment to
facilitate maintenance and a safe work environment.
TABLE 1  MINIMUM CLEARANCE AROUND BOILER
Unit Size
(BHP)
Front Panel
inch (mm)
Rear/Sides
inch (mm)
Vertical - from oor
to ceiling - inch (m)
9.5 36 (915) 24 (610) 99.9 (2.5)
10-15 36 (915) 24 (610) 98.5 (2.5)
20-30 36 (915) 24 (610) 110 (2.8)
40-60 36 (915) 24 (610) 130 (3.3)
80 36 (915) 24 (610) 143.5 (3.6)
100-125 36 (915) 18 (458) 180 (4.6)
250 36 (915) 15 (458) 185 (4.7)
NOTE:The vertical clearance from the oor to the ceiling is
for removal of the burner for servicing the VSRT 9.5-80 and for
access to the steam gate valve for the VSRT 100-250.
VSRT connections and specications are listed in Tables 2 and
3 and shown in Figures 1 through 24.

© Fulton Group N.A., Inc. 2022
INSTALLATION VSRT-IOM-2022-0728 SECTION 2
2-4
TABLE 2  VSRT CUSTOMER CONNECTIONS SEE FIGS. 1  23
Note: *Shipped loose; size depends on trim pressure. **Use of B-vent with the Fulton VSRT boiler requires purchase of the high
temperature vent limit switch part number 2-30-100414
9.5 BHP 10/15 BHP 20 BHP 30 BHP 40 BHP
Description Size Type Size Type Size Type Size Type Size Type
AFeedwater Inlet; in. (mm)* 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT
BBlowdown Outlet; in. (mm)* 1 (25) NPT 1 (25) NPT 1.25 (32) NPT 1.25 (32) NPT 1.5 (38) NPT
CSteam Outlet ; in. (mm)
High Pressure steam outlet* 1 (25) NPT 1.25
(32) NPT 2 (51) NPT 2 (51) NPT 3 (76) CL150
Low Pressure steam outlet NA 2 (51) NPT 3 (76) CL150 3 (76) CL150 4 (102) CL150
DExhaust Stack; in. (mm)
Standard size stack 6 (152) NPT 6 (152) - - - 8 (203) 8 (203) - - - 10 (254) - - -
Stack B-Vent size** NA NPT 8 (203) - - - 10 (254) 10 (254) - - - 12 (305) - - -
ESafety Relief Valve; in. (mm)* 1 (25) 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT
FFuel Inlet; in. (mm) 1 (25) NPT 1 (25) NPT 1 (25) NPT 1.25 (32) NPT 1.5 (37) NPT
GWater Column Drain; in. (mm) 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT
HSight Glass Drain; in. (mm)* .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT
JWater Sample Port; in. (mm)* 25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT
KSteam Sample Port; in. (mm) 25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT
LSurface Blowdown; in. (mm) .75 (19) NPT .75 (19) NPT .75 (19) NPT .75 (19) NPT .75 (19) NPT
MHigh Water Protection; in. (mm) .75 (19) NPT .75 (19) NPT .75 (19) NPT .75 (19) NPT .75 (19) NPT
NSingle Source Power - - - - - - - - - - - - - - - - - - - - - - - -
PCombustion Air Inlet; in. (mm) 3 5/8 (92) 4 (102) - - - 6 (152) - - - 6 (152) - - - 6 (152) - - -
RAux. Water Column Conn.; in. (mm) 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT
50/60 BHP 80 BHP 100/125 BHP 250 BHP
Description Size Type Size Type Size Type Size Type
AFeedwater Inlet; in. (mm)* 1 (25) NPT 1 (25) NPT 1.25 (32) NPT 2 (51) NPT
BBlowdown Outlet; in. (mm)* 1.5 (38) NPT 1.5 (38) NPT 2 (51) NPT 2 (51) NPT
CSteam Outlet ; in. (mm)
High Pressure steam outlet* 3 (76) CL150 4 (102) CL150 4 (102) CL150 6 (152) CL150
Low Pressure steam outlet 4 (102) CL150 6 (153) CL150 8 (203) CL150 10 (254) CL150
DExhaust Stack; in. (mm)
Standard size stack 10 (254) - - - 12 (305) - - - 10 (254) - - - 14 (356) - - -
Stack B-Vent size** 12 (305) - - - NA - - - NA - - - NA - - -
ESafety Relief Valve; in. (mm)* 1.25 (32) NPT 1.5 (38) NPT 2 (51) QTY: 2 NPT 1.5 (37) QTY: 2 NPT
FFuel Inlet; in. (mm) 1.5 (37) NPT 1.5 (38) NPT 1.5 (38) NPT 2.5 (64) NPT
GWater Column Drain; in. (mm) 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT
HSight Glass Drain; in. (mm)* .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT
JWater Sample Port; in. (mm)* .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT
KSteam Sample Port; in. (mm) .25 (6) NPT .25 (6) NPT .25 (6) NPT .25 (6) NPT
LSurface Blowdown; in. (mm) .75 (19) NPT .75 (19) NPT .75 (19) NPT 1 (25) NPT
MHigh Water Protection; in. (mm) .75 (19) NPT .75 (19) NPT .75 (19) NPT .75 (19) NPT
NSingle Source Power - - - - - - - - - - - - - - - - - - - - - - - -
PCombustion Air Inlet; in. (mm) 6 (152) - - - 8 (203) - - - 8 (203) - - - 14 (356) - - -
RAux. Water Column Conn.; in. (mm) 1 (25) NPT 1 (25) NPT 1 (25) NPT 1 (25) NPT

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 2 VSRT-IOM-2022-0728 INSTALLATION
2-5
Unit Size (BHP) 9.5 10 15 20 30 40 50 60 80 100 125 250
Maximum allowable working pressure 100 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI 150 PSI
Boiler input (BTU/HR) 388,815 400,000 600,000 800,000 1,200,000 1,600,000 1,993,000 2,392,000 3,223,000 4,043,357 5,084,903 9,822,500
Boiler input (Natural gas); CU FT/HR 385 400 600 800 1,200 1,600 1,933 2,392 3,223 4,043 5,085 9,823
Boiler input (Propane); CU FT/HR 156 160 240 320 480 640 797 957 - - - -
RATINGS* (Sea level to 3000 ft (914.4 m)
Boiler Output (BTU/HR) 318,051 335,000 503,000 670,000 1,005,000 1,339,000 1,674,000 2,008,500 2,678,000 3,347,900 4,184,875 8,368,750
Steam Output - Minimum Service
Capacity; LB/HR (KG/HR)
328
(149)
345
(156)
518
(235)
690
(313)
1,035
(470)
1,380
(626)
1,725
(782)
2,070
(939)
2760
(1252)
3450
(1565)
4313
(1956)
8625
(3912)
Net Eective Heating Service (SQ. FT) 36 54.5 54.5 65 65 116 116 116 140 203 203 539.5
Water Capacity (Operating); GAL. 25.75 102 102 112 112 333 333 333 393 898 898 1663
Burner Turndown 8:1 4:1 6:1 4:1 6:1 6:1 8:1 10:1 10:1 10:1 10:1 10:1
Draft Requirements -0.25”W.C. to +1.50”W.C.
Minimum Incoming Gas Pressure (PSIG) 3”W.C. 3”W.C. 3”W.C. 3”W.C. 3”W.C. 3”W.C. 3”W.C. 3”W.C. 4" W.C. 13”W.C. 13”W.C. 13"W.C.
Maximum incoming Gas Pressure (PSIG) 13.8”W.C. 13.8”W.C. 13.8”W.C. 13.8”W.C. 13.8”W.C. 13.8”W.C. 13.8”W.C. 13.8”W.C 13.8”W.C 5 PSIG 5 PSIG 5 PSIG
Weights (Approximate)
Dry Weight; LBS 1,700 2,650 2,650 3,100 3,100 5,100 5,100 5,100 5,800 11,485 11,485 22,500
Operating Weight; LBS 1920 3,500 3,500 4,100 4,100 7,864 7,864 7,864 9,080 18,975 18,975 36,369
Shipping Weight; LBS 1850 2,900 2,900 3,400 3,400 6,000 6,000 6,000 6,700 11,800 11,800 23,000
Flooded Weight; LBS 2000 3,850 3,850 4,400 4,400 8,600 8,600 8,600 9,710 19,925 19,925 38,988
Electric Power Requirements
Voltage 120/6/1 120/60/1 120/60/1 120/60/1 240/60/1 480/60/3 480/60/3 480/60/3 480/60/3 480/60/3 480/60/3 480/60/3
FLA at Voltage noted above 16 AMPS 27 AMPS 27 AMPS 27 AMPS 30 AMPS 17 AMPS 17 AMPS 17 AMPS 16 AMPS 24 AMPS 24 AMPS 36 AMPS
Operating Amps at High Fire 4 AMPS 10 AMPS 10 AMPS 10 AMPS 15 AMPS 15 AMPS 15 AMPS 15 AMPS 8.8 AMPS 8.2 AMPS 11.7
AMPS -
Notes for Table 3
1. Steam output LB/HR: From 0 PSIG at 212°F (0 kg/cm² at 100°C).
2. All clearances are factory recommendations. Consult local
jurisdiction for exact code compliance.
3. Fulton recommends minimum clearance of 36”in front of
electrical panels.
4. Fulton recommends 36”clearance between inspection
openings of all boilers, 18”clearance of handholes, and 18”from
exhaust stack.
5. All dimensions inside ( ) denote reference dimensions.
6. All dimensions inside rectangles denote overall dimensions.
7. We reserve the right to change specications and/or
dimensions. All information is subject to change based on
addition of any optional equipment and/or accessories. Please
consult the factory for project specic estimates if additional
options or accessories are required.
8. Local codes can supercede Fulton recommended clearance.
9. The VSRT-10 is available as an 8.5 HP model.
10. The VSRT-9.5 is only available at 100 PSI MAWP Design and 80
PSI Trim
TABLE 3  VSRT SPECIFICATIONS

© Fulton Group N.A., Inc. 2022
INSTALLATION VSRT-IOM-2022-0728 SECTION 2
2-6
F
u
lot n










85 3/4
75 3/4
(MIN HEIGHT)
99 7/8
BURNER PULL
CLEARANCE
N

86 1/8
G
H
J
K
FIGURE 1  9.5HP MODEL VSRT DIMENSIONS  FRONT SIDE
VIEW ALL DIMENSIONS IN INCHES

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 2 VSRT-IOM-2022-0728 INSTALLATION
2-7
FIGURE 2  9.5HP MODEL VSRT DIMENSIONS  RIGHT SIDE
VIEW ALL DIMENSIONS IN INCHES
RIGHT SIDE VIEW
F
u
lot n










4 15/16
21 15/16
63 5/8
A
B
R
L
M
53 3/16
D


© Fulton Group N.A., Inc. 2022
INSTALLATION VSRT-IOM-2022-0728 SECTION 2
2-8
FIGURE 3  9.5HP MODEL VSRT DIMENSIONS TOP SIDE
VIEW ALL DIMENSIONS IN INCHES
F
u
lot n










12 3/4 4 1/16
4 1/16
36 1/8
SEE NOTES
24 (MIN WIDTH)
INSTALLED FOOTPRINT
CE

4 3/4 F
39 7/8MIN:
MAX: 49 1/2
(SEE NOTE 11)
P
Note 3: Fulton recommends a minimum
clearance of 36”in front of the electrical
panels.
Note 9: Fulton recommends 36”clearance
between openings of all boilers, 18”
clearance of handholes, and 18”from
exhaust stack.
Note 11: Local codes supercede Fulton
recommended clearances.

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 2 VSRT-IOM-2022-0728 INSTALLATION
2-9
FIGURE 4  10/15HP MODEL VSRT DIMENSIONS  FRONT
SIDE VIEW ALL DIMENSIONS IN INCHES





Fulton Steam Solutions, Inc.
F
u
lo
tn
22 7/8
98 1/2
CLEARANCE REQUIRED
FOR BURNER REMOVAL
41 3/8
(AIR INLET)
73 5/8
(FUEL INLET)
(74)*
(STEAM OUTLET) 70
(MIN HEIGHT)

P
K
J
G
N
H

© Fulton Group N.A., Inc. 2022
INSTALLATION VSRT-IOM-2022-0728 SECTION 2
2-10
FIGURE 5  10/15HP MODEL VSRT DIMENSIONS  RIGHT
SIDE VIEW ALL DIMENSIONS IN INCHES
RIGHT SIDE VIEW





Fulton Steam Solutions, Inc.
F
u
lo
tn

5
(BOTTOM BLOWDOWN)
22 3/8
(FEEDWATER)
71 5/8( *)
(S.R.V.)
76 3/8*
43 1/16
(EXHAUST STACK)
B
A
L
R
D
M