FULTON ModSync SE User manual

USER MANUAL
ModSync® SE
For use on Fulton Hydronic Boilers
Serial Number
Model
Fulton Order
Owner
Site Name
Date
ModSyncSE-User-Manual-211020

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Questions? Please Contact Your Local Manufacturer’s Representative
ModSyncSE-User-Manual-211020 TABLE OF CONTENTS
0-1
Introduction 1-1
ModSync® Features.............................................................................................. 1-2
Installation 2-1
Location................................................................................................................ 2-2
Power Supply ....................................................................................................... 2-2
Hydronic Boiler Interface...................................................................................... 2-2
Temperature Sensor............................................................................................. 2-2
Wiring................................................................................................................... 2-3
Operation 3-1
Sequence of Operations....................................................................................... 3-2
Screen Descriptions.............................................................................................. 3-3
Operation ............................................................................................................. 3-4
MAIN MENU SCREEN...................................................................................................................34
SYSTEM STATUS SCREEN.............................................................................................................35
HYDRONIC“BOILER # CONFIGURATION”SCREENS.....................................................................36
SYSTEM CONFIGURATION MENU................................................................................................37
SYSTEM AND SCALING SCREEN 1................................................................................................38
SYSTEM AND SCALING SCREEN 2..............................................................................................310
SYSTEM AND SCALING SCREEN 3..............................................................................................312
SYSTEM AND SCALING SCREEN 3..............................................................................................313
HARDWARE CONFIGURATION...................................................................................................314
PASSWORD AND SCREEN SAVER ..............................................................................................319
MAINTENANCE CONFIGURATION SCREEN 1.............................................................................320
MAINTENANCE CONFIGURATION SCREEN 2.............................................................................320
SENSOR CONFIGURATION..........................................................................................................321
BMS CONFIGURATION PORT 2................................................................................................322
ALARM CONFIGURATION...........................................................................................................323
SETBACK SCHEDULE..................................................................................................................324
Setpoint Conguration without Outdoor Reset................................................. 3-25
Setpoint Conguration with Outdoor Reset ...................................................... 3-26
OUTDOOR RESET CONFIGURATION...........................................................................................327
ALARM STATUS..........................................................................................................................328
TRENDING ..................................................................................................................................328
LEAD / LAG CONFIGURATION 1 .................................................................................................329
LEAD / LAG CONFIGURATION 2 .................................................................................................330
LEAD / LAG CONFIGURATION 3 .................................................................................................331
LEAD / LAG CONFIGURATION 4 .................................................................................................332
ISOLATION VALVE CONFIGURATION..........................................................................................333
VDF BOILER CIRCULATION PUMP CONFIGURATION.................................................................334
CONSTANT SPEED SYSTEM PUMPS 1........................................................................................335
CONSTANT SPEED SYSTEM PUMPS 2........................................................................................336
VFD SYSTEM PUMPS 1...............................................................................................................337
VFD SYSTEM PUMPS 2...............................................................................................................338
VFD SYSTEM PUMPS 3...............................................................................................................338
Network 4-1
Network Parameter Conguration and Address Listings..................................... 4-2
Port 2Wiring Diagram (Slave) RJ-11Type Serial Port.......................................... 4-3
Boiler Modbus Network (Port 3).......................................................................... 4-4
Honeywell SOLA Control Setup............................................................................ 4-5
MODBUS COMMUNICATIONTO A SOLA DISPLAY .....................................................................45
SOLA SETTING.............................................................................................................................46
Siemens LMV3 Control Set Up.............................................................................. 4-8
SET UP AT THE MODSYNC®..........................................................................................................48
SETUP AT THE LMV3 CONTROLLER AZL ...................................................................................48
Fulton PURE Control™ Setup.............................................................................. 4-10
Maintenance 5-1
Backing up the Program ...................................................................................... 5-3
Battery Replacement........................................................................................... 5-3
CommonTroubleshooting Issues......................................................................... 5-3
Warranty & Parts 6-1
Factory Default Settings....................................................................................... 6-2
Customer Settings................................................................................................ 6-4
Specications....................................................................................................... 6-6
Parts ..................................................................................................................... 6-7

© Fulton Group N.A., Inc. 2021
TABLE OF CONTENTS ModSyncSE-User-Manual-211020
0-2
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Questions? Please Contact Your Local Manufacturer’s Representative 1-1
INTRODUCTION
INTRODUCTION
1
INSTALLATION 2
OPERATION 3
MAINTENANCE 4
SERVICE DOCUMENTS 5
PARTS & SPECIFICATIONS 6

© Fulton Group N.A., Inc. 2021
INTRODUCTION ModSyncSE-User-Manual-211020 SECTION 1
1-2
Overview
The ModSync® Sequencing System is designed to maximize the seasonal
eciency of multiple hydronic condensing boiler installations. The ModSync®
provides advanced functionality over existing sequencing systems. The
ModSync®’s Outdoor Reset feature resets the hydronic loop temperature based
on the outdoor temperature. Enhanced Lead/Lag capabilities are provided
through user friendly displays and an easy to use Touchscreen Interface.
This manual details’ the ModSync® setup screens and conguration for use with
Hydronic Boilers
The ModSync® SE is a standard o the shelf model that does not incorporate any
customizable options.
ModSync® Features
Lead/Lag Control
The boilers are staged on and o to match the existing heat load. If additional
heat is needed after the lead boiler is energized the lag boiler is enabled.
This keeps the boilers operating at lower ring rates for as long as possible,
maximizing their eciency. All stages will be enabled before allowing the boilers
to operate at higher ring rates.
Outdoor Reset
The ModSync® will automatically adjust the hydronic loop setpoint based on the
outdoor temperature according to a user dened curve.
Setback Schedule
The hydronic loop setpoint can be congured to change based on whether the
building is Occupied or Unoccupied. This allows for the setpoint to be lowered
during times when the heating requirements are reduced, such as at night or
weekends.
Multiple Setpoint Control Modes
The hydronic loop setpoint can be eld-selected to be controlled by the
ModSync®, remote 4-20mA signal, BMS, or manual input.
Modbus Communication
The ModSync® can communicate over the Modbus protocol to Building
Management Systems. BACnet and LonWorks communication are optionally
available through protocol converters.
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations.

Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 1 ModSyncSE-User-Manual-211020 INTRODUCTION
1-3
Alarm Status
Boiler alarm status is monitored and annunciated via an Alarm Screen,
minimizing troubleshooting time requirements.
Alarm History
Alarm History screen provides Date, Time, and Fault information from previous
alarm occurrences.
BMS System Interface
Remote Enable/Disable contacts and Domestic Hot Water priority digital inputs
provide standard BMS interface capabilities.
Firing Rate Tuning
Boiler ring rate will automatically be adjusted to prevent high limit faults in
variable ow applications.
Auto/Manual Mode Control
The ModSync® can be congured for Automatic or Manual control of the boilers.
The Manual features help to decrease the boiler commissioning time by assisting
with verication of the communication interface.
Warm Standby
If a boiler has not run or received a call for heat recently it will be enabled at low
re for a user dened amount of time.
Transition Delay
If a rotation occurs and there is already a Lead Boiler it would delay shutting o
the running boiler(s) until the new boilers are released to modulate for a user
dened period of time (‘Delay’time) and can optionally be left enabled until a
certain setpoint is met to prevent a drop in temperature.
Boiler Isolation Valve Control
The ModSync® can be congured to control the boiler isolation valves. The
ModSync® will keep the lead boiler’s isolation valve open at all times to provide
a continuous ow path. A lag boiler’s isolation valve will be opened when the
boiler is called to run and will remain open until a user dened timeframe elapses
after the boiler is disabled. If isolation valves are selected, boiler pumps will be
unavailable.
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations.

© Fulton Group N.A., Inc. 2021
INTRODUCTION ModSyncSE-User-Manual-211020 SECTION 1
1-4
Boiler Pump Control
The ModSync® can be congured to control the boiler circulator pumps. A
call for heat at the boiler will enable the boiler circulator pump. The pump will
remain enabled until a user dened timeframe elapses after the boiler is disabled.
The ModSync® can also be congured to control the pumps VFD speed. The
ModSync® will run the pump speed to match the boiler ring rate within a user
dened minimum and maximum speed. If boiler pumps are selected, isolation
valves will be unavailable.
System Pump Control
The ModSync® can be congured to control two (2) to four (4) system pumps.
The ModSync® will automatically rotate the lead system pump based on a user
dened number of run hours. The pumps will be enabled below a user dened
outdoor air temperature or a manual command at the ModSync®. The ModSync®
can be congured to control the pumps VFD speed. The pump frequency
reference signal will be generated utilizing user dened Proportional/Integral/
Derivative settings. The pumps can be congured to maintain the systems
dierential pressure or dierential temperature.
Configurable I/O
The ModSync® has a number of dierent congurable options available. To
accommodate these options the digital and analog inputs and outputs will need
to be congured to match the selected options.
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations.

Questions? Please Contact Your Local Manufacturer’s Representative 2-1
INSTALLATION
INTRODUCTION
1
INSTALLATION
2
OPERATION 3
NETWORK 4
MAINTENANCE 5
PARTS & SPECIFICATIONS 6

© Fulton Group N.A., Inc. 2021
2-2
INSTALLATION ModSyncSE-User-Manual-211020 SECTION 2
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
Location
The ModSync® enclosure should be located in a clean, dry environment within
visual range of the boilers. Four (4) mounting supports are provided loose in the
enclosure. Secure the supports to the enclosure and mount the ModSync® in an
easily accessible area of the boiler room. The enclosure meets NEMA
classication 4.
Power Supply
A 120VAC/60Hz/1PH electrical supply is required by the ModSync®. The hot
supply should be connected to the integral 10A circuit breaker for short circuit
protection. The neutral wire should be connected to the corresponding N
terminal block and the ground wire to the green ground terminal block provided
in the ModSync® enclosure.
Hydronic Boiler Interface
Hydronic boilers provide status feedback through Modbus communication
or using contact closures and analog (4-20mA) signals. Please reference the
associated electrical diagram to determine the communication runs required
between the ModSync® and the Hydronic boilers.
Temperature Sensor
One (1) PT100 RTD Temperature Sensor is provided with the ModSync®. The
Hydronic Loop Supply Temperature Sensor is shown in Figure 2 below.
The Hydronic Loop Supply Temperature Sensor should be mounted in a
thermowell with provided conductivity paste. The well should be located in the
common hydronic loop header after the connection point of the last hydronic
boiler in the system. The Hydronic Loop Sensor should be located such that it will
read the mixed temperature of ow through all of the condensing boilers.
The Supply Temperature can also be provided by the BMS. This option can be
user selected under the “Sensor Conguration Screen”. Refer to the Network
Section of this manual for the Modbus mapping points.
Specications:
• High Range Wire Round
(-200 to 600) ºC [-328 to 1112] ºF
• Tolerance: Grade B
• Base Resistance: 100 Ω
• Sheath Diameter: 38
• Sensor Length: 4”
• Sensor Material Type: 303 Stainless Steel
• Threaded Fitting: ¼” NPT
FIGURE 1 –
HYDRONIC SUPPLY SENSOR

Questions? Please Contact Your Local Manufacturer’s Representative 2-3
SECTION 2 ModSyncSE-User-Manual-211020 INSTALLATION
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
Wiring
The physical inputs and outputs of the ModSync® SE are able to be customized
by the user. Descriptions of the selections available are below.
Digital Inputs
Dry contacts through the use of control relays should be provided for all digital
inputs. All digital inputs use the controls 24DC+ for the source voltage.

© Fulton Group N.A., Inc. 2021
2-4
INSTALLATION ModSyncSE-User-Manual-211020 SECTION 2
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
Digital Outputs
All digital outputs are 24 VDC. Control Relays should be used to buer control
signals as the output contacts are only rated for 0.5A maximum current output.
Options for Digital Outputs include:
Individual Boiler Isolation Valve Control Output
Individual Boiler Circulation Pump Control Output
Individual Boiler Alarm Output
General Alarm Output
Individual Boiler Status Output
Heat Demand Status Output
Individual System Pump Enable Output
Individual Heat Demand Output
Individual Boiler Valve Interlock
Individual Boiler Pump Interlock
E-Stop Status
Individual Boiler Remote Mode
Selected
Individual Boiler Main On Status
Individual Boiler Alarm Status
Individual System Pump Status
Individual System Pump Alarm
Primary Low Water
Secondary Low Water
Programmable Options for Digital inputs include:

Questions? Please Contact Your Local Manufacturer’s Representative 2-5
SECTION 2 ModSyncSE-User-Manual-211020 INSTALLATION
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
Analog Inputs
All analog inputs are 4-20 mA. Analog inputs are wired directly to the analog
input module. Every two inputs share a common. Options for Analog Inputs
include:
Individual Boiler Outlet Temperatures
Supply Pressure Input
Return Pressure Input
Dierential Pressure Input
Analog Outputs
All analog outputs are 4-20 mA. Options for Analog Outputs include:
Individual Boiler Circulator Pump VFD Speed
Individual System Pump VFD Speed
Individual Boiler Firing Rate

© Fulton Group N.A., Inc. 2021
INSTALLATION ModSyncSE-User-Manual-211020 SECTION 2
2-6
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Questions? Please Contact Your Local Manufacturer’s Representative 3-1
OPERATION
INTRODUCTION
1
INSTALLATION 2
OPERATION 3
NETWORK 4
MAINTENANCE 5
PARTS & SPECIFICATIONS 6

© Fulton Group N.A., Inc. 2021
3-2
OPERATION ModSyncSE-User-Manual-211020 SECTION 3
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
! WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes
and regulations. Failure to follow
instructions may result in a re or
explosion, causing property damage,
personal injury, or loss of life.
This boiler is equipped with an
ignition device, which automatically
lights the burner. Do not try to light
the burner by hand.
Do not store or use gasoline or
other ammable vapors and liquids
in the vicinity of this or any other
appliances.
Use only your hand to turn the valve
handle. Never use tools. If the knob
will not turn by hand, don’t try to
repair it. Call a qualied service
technician. FORCE OR ATTEMPTED
REPAIR MAY RESULT IN A FIRE OR
EXPLOSION.
WHAT TO DO IF YOU SMELL GAS • Do
not try to light any appliance. • Do
not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. 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.
Do not use this boiler if any part
has been under water. Immediately
call a qualied service technician to
inspect the boiler and to replace any
impacted part of the control system.
Sequence of Operations
Designed to maximize the eciency of a multiple boiler hydronic loop, the
ModSync® resets the loop temperature based on Outdoor Temperature. The
hydronic boilers are sequentially staged on at low re, if additional heat is
required; the condensing boilers are modulated together, maintaining the lowest
ring rate possible to match the system load.
A typical Sequence of Operations is as follows:
1. The ModSync® monitors the outdoor temperature and calculates a water
loop temperature setpoint based on the selectable preset values. A
PID Control Variable determines when the hydronic boilers will begin
sequencing, based on the dierence between the actual water loop
temperature and the calculated (by outdoor air) water temperature
setpoint.
2. The lead boiler is enabled when the water loop temperature reaches a
selectable value referenced around the water loop setpoint and the ring
rate is maintained at lowest possible ring rate based on the control
variable.
3. If the water loop temperature continues to decrease, the PID Control
Variable will increase. The lead boiler’s ring rate will track the control
variable value. The ModSync® will enable a Lag Boiler when the Lag Boiler
Start control variable value has been reached and the Lag Boiler Start
Delay time has expired. The Lead and Lag boiler’s ring rates will modulate
together at the lowest possible ring rate.
4. If additional heat is required, the ModSync® will enable each additional
Lag Boiler until all of the available boilers in the loop have been energized.
Each boiler will remain at the lowest possible ring rate until all of the
boilers have been enabled.
5. If all of the boilers are enabled and additional heat is required, the
ModSync® will release the boilers to fully modulate. The boiler will
modulate together as a single unit to keep the condensing boiler system at
the lowest possible ring rate, maximizing the hydronic loop eciency.
6. As the water loop temperature increases, the ModSync® will begin
to decrease the ring rate of the boilers to maintain the water loop
temperature. If all of the boilers are at low re and the control variable
decreases to a user congurable level, the ModSync® will begin to stage
the boilers o. The rst lag boiler energized will be the last lag boiler to be
disabled. The boilers will continue to be disabled based on the temperature
rise and control variable response.
7. The lead boiler is disabled when the water loop temperature reaches a
selectable value referenced around the water loop setpoint.

Questions? Please Contact Your Local Manufacturer’s Representative 3-3
SECTION 3 ModSyncSE-User-Manual-211020 OPERATION
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
! WARNING
Do not attempt to start the boiler for
any testing before lling and purging
the boiler. A dry re will seriously
damage the boiler and may result in
property damage or personnel injury
and is not covered by warranty.
Before commissioning the boiler,
verify with authorized personnel that
the gas lines have been purged.
Never attempt to operate a boiler
that has failed to pass all the safety
checks.
Never leave an opened manual air
vent unattended. In the event an
opened vent is left unattended, water
damage could occur.
4 CAUTION
Do not use this equipment if any part
has been under water or subjected
to heavy rains/water. 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.
The thermal shock warranty does not
cover damage due to cyclic fatigue.
LNOTE
Turndown: Wind eects on
combustion air supply and exhaust
terminations, natural draft “stack
eect”, and gas delivery systems
(among other site factors) will
ultimately determine what turndown
settings are optimal for each
application. Use a calibrated gas
ow meter (not supplied) to measure
burner input rates. Consult your
local manufacturer’s representative
or service organization with factory
authorization specic to the Endura
product line for guidance.
Screen Descriptions
The ModSync® Sequencing System provides multiple screen interfaces for
easy access and conguration of the control parameters. Parameter values are
selected through the touch screen interface and entered using the ModSync®
keypad.
The ModSync® touch screen allows for screen navigation and parameter input by
simply touching inside the rectangle that outlines the associated variable.

© Fulton Group N.A., Inc. 2021
3-4
OPERATION ModSyncSE-User-Manual-211020 SECTION 3
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
Operation
Main Menu Screen
The main menu provides a touchscreen interface to select other screens.
FIGURE 2 – MAIN MENU SCREEN
System Status Screen
Setpoint Screen
Lead / Lag Conguration Screens
System Conguration Menu
Alarm Status Screen
Setback Schedule Screens
Trending Screen
Information Screen

Questions? Please Contact Your Local Manufacturer’s Representative 3-5
SECTION 3 ModSyncSE-User-Manual-211020 OPERATION
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
System Status Screen
The System Status screen is the primary ModSync® screen. This screen displays
the current pressure status of the steam system, pressure setpoint, control
variable value, and boiler status.
FIGURE 3– SYSTEM STATUS SCREEN
Default Setting Parameter Range Description
-Degrees F / C Supply Temperature:
May be read using either an RTD or BMS
input, also known as loop temperature
-Degrees F / C Supply Setpoint:
Desired temperature for the boilers to
maintain in the system; determined
using one of the selected setpoint
modes at the ModSync®.
-0 - 100% Control Variable:
Output percentage indicating the
current system heating requirements.*
* Control Variable is an indication of how much of the total boiler plant is required
for the system to get up to setpoint (0% = minimum or no boilers required,
100% = all boilers required at high re). The rate of increase/decrease of the
control variable is determined by the supply temperature as compared to the
setpoint and the PID settings.

© Fulton Group N.A., Inc. 2021
3-6
OPERATION ModSyncSE-User-Manual-211020 SECTION 3
! WARNING
This manual is provided as a
guide to the correct operation and
maintenance of your equipment,
and should be read in its entirety and
be made permanently available to
the sta responsible for equipment
operation. 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 without notice.
Do not install, operate, service,
or repair any component of this
equipment unless you are qualied
and fully understand all requirements
and procedures.
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional /professional codes or
regulations
Hydronic“Boiler # Configuration”Screens
The Boiler Conguration Screens are used to independently setup each hydronic
boiler in the loop. The Hydronic Boiler Conguration screen allows the user to
change the mode of each hydronic boiler in the loop, along with providing a
manual control option. See Figure 6.
FIGURE 4 – BOILER CONFIGURATION SCREEN
Status: Provides the current status of the individual boiler. This is the BEST
location to nd out what the boiler is doing. Some common boiler status states
are listed below.
Status Description
Standby The boiler is not running and is waiting for the ModSync® to
give it a run command.
Heat Demand The boiler has received a heat demand from the ModSync®
but has not reached ignition.
Gas Valves
Energized
The boiler has reached ignition and the fuel valves have
been opened.
Modulating The boiler has stabilized ame and the ModSync® has
released the boiler for modulation.
Outside Temp.
Cuto
The outdoor air temperature is above the outdoor
temperature cuto value. The boiler will not receive a heat
demand from the ModSync®.
Modbus Comm
Error
Modbus communication between the boiler and the
ModSync® has failed. Make sure that the boiler is online,
addressed, and wired correctly.
L/L Position: Displays the current lead lag position of the boiler. This will
indicate in which order the boilers will be enabled by the ModSync®. If in alarm
or otherwise disabled the L/L Position will state“Disabled” and another enabled
boiler will take the place of the disabled boiler.