© Fulton Group N.A., Inc. 2020
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CONTROL MENUS
Hydronic-PURE-Control-UserManual-211214
SECTION 3
!
WARNING
This addendum is specific to the usage
of the
Hydronic PURE Control™
and
should be used in conjunction with
the current version of the respective
boiler’s Installation and Operation
manual. Both should be read in their
entirety and be made permanently
available to the staff responsible for
equipment operation.
This addendum should not be
considered as a complete guide, nor
should it replace existing guides or
standards which may be applicable.
Fulton reserves the right to change
any part of this addendum and
the corresponding Installation and
Operation manual without notice.
Do not install, operate, service
or repair any component of this
equipment unless you are qualified
and fully understand all requirements
and procedures.
All information in this addendum 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.
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 fire department.
A qualified installer, service agency
or the gas supplier, must perform
installation and service.
The Lead Boiler will be the first boiler that is staged on when a call for heat is
determined by the Network Originator. The Lead Boiler will fire up modulate as
needed to maintain the current load. The Network Originator will continue to
stage on additional Lag Boilers that are available based on the user defined PID
and Lag Boiler Delay Time. When a Lag Boiler comes online the Lead Boiler firing
rate will be reduced so that the load is split between all running boilers and will
continue to modulate in parallel as required to meet the load.
In the event that a running boiler shuts off for any unexpected reason the next
available boiler will be staged on immediately to take its place. If the boiler
returns to normal operation during an active call for heat it will be assigned a
temporary (T) position as the last Lag Boiler and will not interrupt the currently
running boilers, but may be used in the sequence if the system load requires it.
As the System Supply temperature increases and approaches the setpoint the
boilers will modulate down in parallel until the Setpoint is met or exceeded in
which case the boilers will stage off based on the user defined PID and Delay
Time. As boilers stage off, the remaining boilers firing rates will increase slightly
in order to adequately maintain the remaining system load. This process will
continue until only the Lead Boiler is running or the system demand increases in
such a way that the Lag Boilers are required to stage back on in order to maintain
the load.
If at any point the System Supply Temperature exceeds the Lead/Lag Setpoint
plus Lead Stop Value, all boilers will stage off immediately and wait for the next
call for heat. After the current call for heat has ended the Network Originator will
then reassign the temporary boiler positions as selected by the user Lead/Lag
Priority setting.
PID Control Menu and Boiler Modifiers
The
PID Control
Menu contains settings and modifiers that will influence the
boiler operation. Many of these items will take precedence over calculated firing
rates and call for heat demands should the conditions be met.
