Home

HydroTherm KN Series Firmware Revision Sheet

1. If the IRI gas valve proving package is installed there may be not enough time to allow the IRI circuit to prove gas before the CALL FACTORY message is displayed and the system locks out IRI circuit needs 15 to 25 secs to prove The time now allowed for the IRI gas proving circuit to prove has been extended to one minute Issue reported by factory Fixed an annoying audible alarm problem When a fault occurs an Alarm is started If a call for heat is still present and the fault clears the audible alarm will also clear But when the boiler restarts and the main valve opens an audible alarm may sound for approx 1 minute with no indication of a fault before clearing This is intermittent and is a result of the prior alarm fault being latched Issue reported by factory Revision 2 43 5 FEB 2008 07 09 14 18 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 07 09 14 1 Final release of field tested 2 4 version firmware Revision 2 42 Pre Release 24 JAN 2008 1 When setting the Variable Flow Proving time to greater than 10 seconds added in Version 2 4 pre release the CALL FACTORY message is displayed and the boiler locks out This has been corrected Revision 2 4 Pre Release 18 DEC 2007 This revision incorporates field requests to improve serviceability and function 1 Two special FAILSAFE MODES have been added to help protect systems from loss of heat conditi
2. The following is an example using mixed condensing and non condensing boilers Condensing boilers may be configured to fire first set to PRIORITY 1 when A The Return water temperature is below 130F and condensing occurs B The Outside Air Temperature is above a setpoint determined by the system configuration This setpoint ensures that the more efficient condensing boilers run during shoulder months Spring and Fall when minimal heating is required Below this setpoint larger boilers should be brought on first to base load the system C Greater efficiency is required Condensing boilers may be configured to stop first set to PRIORITY 1 when A The Return water temperature is above 130F and condensing is minimized thus leaving the larger lower cost boilers running to carry the load B The Outside Air Temperature is below a setpoint determined by the system configuration This setpoint ensures that the larger non condensing boilers run during the coldest months when maximum heating is required Above this setpoint smaller condensing boilers should be brought on first to run the system as efficiently as possible C Maximum heating is required START PRIORITY 1 SET FIRST STOP PRIORITY 1 SET OAT lt IDLE START PRIORITY 1 SET Selections always the lowest runtime first FIRST The condensing boilers Priority 1 are always started FIRST OAT gt 15F The condensing boilers Priority 1 are started w
3. falls below this temperature ADVANCE SETUP BASE LOADING START lt OA T STOP menu item The relay contact will open when the OA T read from the Outside Air Temperature sensor if equipped rises above this value ADVANCE SETUP BASE LOADING STOP gt OA T NOTE If the OA T qualifier is used as the Start and Stop qualifier ensure that there is at least a few degrees difference for hysteresis C Return Water Temperature 1 D FIRST 1 START menu item The relay contact will close when the RET read from the Return Water Temperature sensor if Equipped falls below this temperature ADVANCE SETUP BASE LOADING START gt RET STOP menu item The relay contact will open when the RET temperature read from the Return Water Temperature sensor if Equipped rises above this temperature ADVANCE SETUP BASE LOADING STOP lt RET STOP menu item The relay contact will open when the temperature exceeds the heating band This gives the result of stopping the Base Load boiler First Default setting The DELAY TIME is also included to hold off starting the boiler until this delay time is met Once the start condition qualifier term is met the DELAY TIME will start counting down When the time expires the base load relay contacts will close ADVANCE SETUP BASE LOADING DELAY TIME It is adjustable in a range of 0 to 60 minutes A display issue exists with an operating limit condition on a Member boiler when the Member boiler is in STANDBY A
4. 1 x controls and prior firmware releases If the FHI boiler has severe ignition problems i e damaged insulator HV cable or sparking to chassis the ignition noise could cause the executed code to jump to the flash drive loader code which is still resident on version 1 x controls Once there it would erase the existing bootloader and program since none of the hardware was there to support it Revision 3 32 25 JAN 2009 Preliminary limited release 1 There is no Post Purge on the System and Local pumps if a loss of flow occurs With this revision if the flow switch was to trip due to a loss of flow the Post Purge cycle of the pumps will occur The Post Purge was not done in all prior versions and the pump would shut off within 3 seconds and wait 10 minutes to retry the pump This was to allow some time for the pump to cool down with no power applied and assuming the pump failed if the pump motor tripped its breaker and then would attempt a restart In the event that the flow switch failed shutting off the pump could cause the boiler to trip the High Limit and lockout So now the boiler will shut down and complete a pump post purge then shut the pumps off and wait the remainder of the 10 minute retry before trying to start again 2 Allow the factory to set turndown through firmware Revision 3 31 2 JAN 2009 Preliminary limited release 1 Renamed the MIN IGN and MAX OUT text in calibration mode to avoid confusion Th
5. BOILERS to 1 Currently allows 1 base load boiler 4 The START amp STOP qualifier condition to the method discussed below 5 The DELAY TIME to the amount of time required after the start qualifier condition has been met to start the boiler If a MINIMUM OFF time of the Base Load boiler is needed the Base Load boiler will share the MIN OFF TIME of this boiler If the base load boiler was running and shuts off the MIN OFF TIME will need to expire before the boiler can start again Once this time expires the DELAY TIME also needs to expire to start the boiler This will help in minimizing short cycle conditions and can be set at ADVANCED SETUP FIRING MODE MODE MIN OFF TIME Preferred A modulating base load boiler that can accept a 4 20mA control signal is preferred A 135 ohm input for the base load boiler will need a converter from 4 20mA to 135 ohm Stopping the Base Load boiler will require that the size of the Base Load boiler ex Hi Lo in BTUs is known relative to the Heat Net boilers if the base load boiler is not of the modulating type Boiler selection is ideally having more total BTUs in the Heat Net boilers than total BTUs of the Base Load boiler This will prevent short cycling Example 4 2 million BTU Heat Net boilers 8 million BTUs and 1 6 million BTU Base Load boiler When all 4 Heat Net boilers are running 99 the Base Load boiler is called on demand is approx 8 million BTUs As the Base load boiler comes
6. Communications board integrated with the main board from version 1 x control with the addition of a Flash Drive port connector for bootloading Added continuous daily runtime restart This feature monitors the runtime of a boiler and if it has exceeded 24 hours of continuous runtime the boiler is restarted A log entry UV SHUTDOWN TEST will be made to indicate this This feature allows the ignition control to prove its UV detection circuitry Added the selection of a Lead Boiler in SETUP BOILERS to allow the lead boiler to start first in ADVANCED SETUP FIRING MODE and then rotate boilers based on runtime This provides a way to assign a designated lead boiler that will create a draft for common vented systems During failsafe operation the Local Pump relay contact is enabled on the failsafe boiler as always ON This is used to ensure a flow of water over the outlet sensor Added the Adaptive Modulation mode ADAPTIVE MODULATION method is used for bringing on new boilers by the MASTER This menu is accessed in ADVANCED SETUP ADAPTIVE MOD This method helps prevent over firing of the system when boilers are added This change results in the removal of the Heat exchanger feature in version 2 45 item 5 When a new boiler is added the Master boiler adjusts the system modulation rate lower to compensate for the BTUs that will be introduced by the newly added boiler Once the newly added boiler fires and an adjustable timer
7. fire next with the least runtime may not occur Advanced Thermal Hydronics 2004 260 N Elm St Westfield MA 01085 The USE LEAD BOILER menu is replaced by setting the SETUP BOILERS LEAD BOILER to a 0 equivalent to NO and will disable the use of the LEAD BOILER Setting it to a boiler number will enable that Lead Boiler If the heating application uses the Lead boiler the lead boiler may need to be set since the default value for MIXED amp TRUE after loading this revision is SETUP BOILERS LEAD BOILER 0 For LOFO amp FOFO the default is 1 Revision 3 44 25 JAN 2010 Release 07 09 14 Corrected a display issue caused in Version 3 43 when there is no call for heat and the System Flow switch is open The message HEAT OPL would be displayed This has been corrected to display STANDBY Also When a delayed open interlock was in process of timing out HEAT OPL was displayed until the delay expired This was corrected to display HEAT INTLK until the interlock fault delay time completed During Warm Weather shutdown HEAT OPL would be displayed if the operating limit was tripped and Warm Weather Shutdown was entered at the same time The HEAT OPLM would be displayed until WWS exited This has been corrected Identified an issue where the Outdoor Air sensor and other sensors failed as OPEN or SHORTED when they were not present version 1 control boards BLUE Fast AC line power cycling brownout
8. in the system Base load boilers can be mixed in the same way as condensing and non condensing boilers The base load boiler s can be prioritized in one set say priority 2 and non base load boilers priority 1 the other set The non base load boilers can then be set to fire first and once they are all firing the base load boiler would fire To minimize the cycling of a large base load boiler consider using the stop condition Change it to the OA T lt 15F Outside Air Temperature condition This setting may be used to stop Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 07 09 14 the priority 1 boiler set when the OA T drops below the OA T setpoint thus leaving the large base loaded boiler on and shutting off the condensing boilers first This is also true when using the OA T setting to start the priority 1 boiler set when the OA T is above the start setpoint To use temperatures as start and stop conditions the system design temperatures must be known Starting Boilers When a boiler is to be fired water temp is below the heating band the Master checks the Heat Net boilers it has available The Master boiler then looks at which boilers are returning priority firing status set on a boiler in ADVANCED SETUP SYSTEM BOILER TYPE PRIORITY If the Start condition is met ADVANCED SETUP FIRING MODE MODE MIXED SET FIRS T example the Master or Member boiler that is configured as PRIORITY 1
9. minimum set modulation and would cause Air Flow Switch faults on the Ignition Control This conflict is now handled On earlier releases a temporary solution to this bug was to set the Operating Limit Band to 1 and the Operating limit higher than the top of the Heat Band Though this could not handle the externally controlled setpoint 4 20mA 0 10VDC 2 Corrected the low fire hold to work as defined in the manual Prior to this release the first 10 seconds of the Modulate Delay Time overlapped the Main Flame proving time of 10 seconds This would result in the boiler never going to Low Fire after the flame proving time with the Modulate Delay Time set to the default time of 10 seconds Now the Boiler will hold at the ignition rate as before for 10 seconds and then drop to the Minimum rate for 10 seconds The Modulate Delay Time is adjustable and set in the ADVANCED MODULAR BOILER SET menu DOC HYDKNHL 15 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 3 Corrected a damper issue when operating as a stand alone boiler During a fault condition the damper may remain open rather than closing The damper will now close when a fault condition occurs with only one boiler present 4 Added log entries to the log when the failsafe mode is entered Prior versions made no entries when a boiler entered failsafe Revision 3 33 25 Feb 2009 1 Corrected a software protection bug with version
10. resets may cause the control to erroneously detect a phantom chip on a version 1 board that is only present on version 2 boards Detection of version 1 and version 2 boards has been adjusted to account for this condition This issue does not exist on version 2 boards A condition exists where the Heat Net control will close the last interlock to start the ignition control and the START interlock relay K3 or K1 s contact would stick open While this is rare the boiler will lock out and require a manual power cycle This failure mechanism would be displayed as CALL FACTORY if the blowout plug were intact After this release CALL SERVICE will be displayed In order to minimize this impact and downtime a retry algorithm of 5 attempts has been added If this condition occurs an will be displayed and the status screen will display retry strt indicating it has attempted a restart to un stick by electrically tapping on the K3 and K1 relays During this restart period the restart timer is loaded with the local pump post purge time 3 seconds This is to ensure the water flow through the boiler has ceased and the flow switch is open thus removing the power to the K3 interlock relay If this does not work the control will attempt up to 4 more retries before locking out This method to electrically tap the K3 relay may not work completely in systems without local valves pumps since a way of opening the interlock circuit n
11. 0ma The boiler must drop lma below this to turn OFF in this example 4 00ma This hysteresis value is not adjustable When using the 4 20ma setpoint control a band may now be set at which the 4 20ma signal will operate over to establish a remote setpoint The lower setpoint is defined as 4ma SETPOINT and the upper setpoint is defined as 20ma SETPOINT The 4ma SETPOINT is linked to the BOILER START x xxma where this starting current is the lower setpoint So if we set the 4ma SETPOINT to 130F and the 20ma SETPOINT at 180F we will have established the band Once a starting control current of BOILER START 4 1ma is applied the boiler will start 4 20 REMOTE ENABLE INPUT CLOSED and the setpoint will be set to 130F If a control current of 10ma is applied the boiler will track on a linear slope towards the 20ma SETPOINT settling ata SETPOINT of 149F As the current increases to 20ma the SETPOINT will indicate 180F The Default setting is 4ma SETPOINT 50F and 20ma SETPOINT 220F for backwards compatibility with the older version NOTE anytime a new firmware version is uploaded to the control these values return these defaults If using the direct modulation mode by applying a 4 20ma current only the BOILER START x xx Setting applies If the Air Pump fails that is associated with the UV switch the alarm contacts would close on prior versions This would cause a Building Management System to shut the system or boiler down when the boiler can still
12. Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 Advanced Thermal Hydronics KN Series H NET Control Firmware Revision Sheet Revision 3 56 57 9 July 2014 Release 1 Added the fault error codes to the upper byte of the BOILER STAGECONTROL bits This is to allow HeatNet online to properly decode a fault 2 Increased the maximum ADD BOILER delay time from 15 minutes to 1 hour due to requests 3 Added the ability for a boiler to take itself offline from HeatNet when the return water temperature is below a threshold This feature would primarily be used to keep non condensing boilers from firing in a condensing situation It may be used with the priority 1 amp 2 modes to keep only condensing boilers running when return temperatures are low If the boiler is isolated by a pump valve a HeatNet V3 board can be used as a Master boiler to supply the return temperature The V3 board has the ability to measure the system return temp and send it to each boiler via the HeatNet network The version 2 board this firmware can then use it to view the system return temperature and make itself not available to fire by HeatNet While the boiler is in this not available state it can still be fired locally and failsafe is still available If the Master boiler is a version 2 board the Master will always transmit its return temperature to all boilers If the Master is set to Priority 1 and all other non condensing boilers
13. ELTA and can be adjusted from to 120 degrees with a default of 100F The 3 line displays LIM gt HALF RATE and if set to YES enables this feature set to NO disables When this feature is active the run screen will display 1 2 INPUT rather than RUN along with an The STATUS screen will display ADAPTIVE IN along with the START and STOP time Once the temperature across the boiler falls 1OF below the EXCHGR DELTA temp normal control is resumed The purpose of this feature is to limit the firing rate by the called for firing rate of the boiler This occurs immediately when the temperature across the boiler inlet to outlet exceeds the EXCHGR DELTA value This feature provides a means to prevent short cycling when the header sensor temperature is temporarily diluted by a parallel colder water source During this condition the Outlet SUPPLY temperature of the boiler will rise in an attempt to meet the setpoint temperature This may force the outlet temperature into the OPERATING LIMIT BAND and try to slower bring the firing rate lower in an attempt to trip on the OPERATING LIMIT As an example The temporarily colder water source may occur from a slow opening valve on a member boiler that takes awhile to prove flow before allowing the member to fire This feature along with the OPERATING LIMIT and the OPERATING LIMIT BAND should help in resolving troublesome short cycling issues Revision 2 44 13 FEB 2008 1 N
14. Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 07 09 14 24
15. ONS LOCAL PUMP PUMP VALVE OPTION LOCAL PUMP VFD ON Setting this Option to ON will map the control signal on J4 pins 1 and 5 to the modulation rate 2 wires need to be run from J4 1 and J4 5 to the VFD s input connection Ensure that the J18 shunt jumper on the control board is in position PWM 0 10 This will allow the local pump to run at speeds relative to the firing rate of the boiler Fixed a display issue when erasing the temperature pointer in the main screen Added a failsafe mechanism for Base Loading using the J4 relay If there are no boilers available to fire fault and there are no boilers in local override and there is a call for heat The J4 Base Load relay will close If a boiler becomes available and needs to fire the Base Load boiler will remain firing until the temperature exceeds the band Added the MIN RUNTIME to the ADVANCED SETUP FIRING MODE This setting replaces the USE LEAD BOILER menu item Prior to this change when using TRUE Runtime or MIXED fire rotation the boilers were rotated based on how many seconds elapsed between boilers typically a 3 minute difference This was determined to cause boilers to rotate too quickly This change will allow a boiler to rotate only once it has exceeded the time in hours set in MIN RUNTIME This change allows a boiler that has already fired and warmed up to fire again when it s minimum runtime has not been met Some limitations may be in effect and the most optimal boiler to
16. ST ON and SETUP PUMP VALVE OPTION REMAINS ON ON will open the local valve after 30 seconds in anticipation of entering Failsafe mode It will remain open until the boiler is ready to fire in Failsafe Mode 10 minutes A normal post purge time on the pump will remain in effect The pre release version 3 41 did not allow setting of the clock through the menu system This issue was caused by a code efficiency change The ability to write to the clock has been corrected with this pre release Revision 3 41 25 SEP 2009 Pre Release 07 09 14 13 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 1 Added the MIN OFF TIME in menu ADVANCED SETUP FIRE BOILERS MIN OFF TIME The minimum off time is used to prevent short cycling of the boiler when a call for heat is made and then removed within a short period of time Its purpose is to provide a minimum time the boiler remains OFF after a heating cycle completes By setting the MINIMUM OFF TIME to a value of 0 10 minutes short cycling can be minimized Once a boiler cycle ends Post Purge completes the minimum off time begins counting down During this time a call for heat if present is held off Master HEAT WAIT will be displayed if a call is present otherwise STANDBY until the timer expires Then STANDBY will be displayed Member The boiler will first indicate HEAT WAIT until the master boiler detects that the member is offline and unavail
17. UP MODULAR BOILER SET MOD MAX LAST FIRE The timer value ADVANCED SETUP MODULAR BOILER SET ADD BOILER DELAY is used in conjunction to limit the modulation for this amount of time Once the boiler has fired and the ADD BOILER DELAY time expires the full modulation is available This change is a protective means for extending the life of the heat exchanger which may consistently be exposed to thermal stress Revision 3 47 9 Jun 2010 Release 1 An issue exists when using a Flash Drive to update the firmware Due to an end of life component in positions U20 and U2 a substitute was used This firmware version applies to version 2 x control boards manufactured between 3 8 10 to 6 7 10 If the U20 component is manufactured by Microchip part number and symbol on chip 25LC256 SS this firmware release needs to be downloaded via USB cable and a PC laptop The Flash Drive loader may not work with earlier firmware versions if this chip is present This release corrects this issue Revision 3 46 29 Mar 2010 Release 1 Corrected an issue when writing the setpoint using Modbus LonWorks or BACnet If the setpoint is written repeatably within a few minutes a condition may arise where the real time clock will not increment the time This has been corrected with this release Revision 3 45 25 FEB 2010 Release 1 Added the ability to control a local pump using a Variable Frequency Drive To enable this feature SETUP PUMP OPTI
18. able to fire Once the master sees the member boiler is unavailable the master will remove its call for heat and the member will indicate STANDBY The STATUS screen will show Min off Once the timer expires the member boiler will post its status as available and STANDBY will be displayed Due to the addition of the MIN OFF TIME the FIRE BOILERS menu was rewritten The menu item MODE is the Fire mode and the selections have been abbreviated FIRST ON FIRST OFF is now FOFO LAST ON FIRST OFF is now LOFO TRUE RUNTIME is now TRUE Fixed the default DHW DIFF value in SETUP DOMESTIC HOT WATER DHW DIFF when using the centigrade temperature scale Allow 38k baud rate for Modbus communications Previous releases only allowed 19 2k The ADVANCED SETUP SYSTEM menu now contains a BOILER TYPE menu that will allow a boiler to be classified by its input BTU size in increments of 10 000 It also allows selecting whether it is CONDENSING and what its relative MASS is Currently these values do need to be set at the field jobsite but will be used in future releases Internal firmware program efficiency rewrite Allow shutting off the Predictive Start Algorithm ADVANCED SETUP FIRING MODE PREDICT START YES will allow the boiler to start in or above the heating band when A There are no boilers firing B The water temperature is falling so fast that it will fall below the band before the main valve opens The predictive start algorith
19. anged and retained after a power cycle Revision 2 00 19 JUNE 2007 MAJOR FUNCTIONALITY RELEASE 1 07 09 14 True Runtime Boiler Rotation added This feature allows boiler rotation based on runtime Each boiler stores it s own runtime The Master polls this runtime from each boiler and fires the boiler with the lowest runtime The boiler with the most runtime is stopped first 21 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 2 Allows the Master boiler to always be the first to fire This is used in a common vent system when a draft needs to be established first before firing other boilers 3 4 20mA remote setpoint control A 4 20mA signal can be converted to a setpoint by a building management system This feature is primarily used when a BMS is controlling the Outdoor Reset function 4 Last pump valve remains on This feature is used to prevent deadheading in variable flow systems by leaving the Master boiler s pump valve open if no boilers are firing 5 Added the System Pump control Along with the Local pump valve circ a system pump control relay was added along with a summer shutdown jog feature Revision 1 62 12 JAN 2007 1 This release changed the default minimum fire value from 20 5 1 to 25 4 1 for compatibility with the KN6 and KN10 and as the shipping condition for the KN20 This value is loaded when the Factory Defaults menu is entered and Factory Cal is sele
20. are set to Priority 2 the Master should always remain on if there is a call for heat This requires that the Priority 1 boiler be set up to start first and stop last This method should always send a valid return temperature to the Member boilers This method can also be used with a version 3 board but a system return sensor is preferred if available When this condition is in effect the STATUS screen will indicate blr offline SETUP AUX FUNCTIONS HEAT EXCHANGER LOW TEMP OFF No check is made to the return temperature boiler remains online RETURN Uses the boilers own return sensor No pump valve present SYS RETURN Uses the System Return temp received from the Master Boiler SETUP AUX FUNCTIONS HEAT EXCHANGER TEMP lt 140F Adjustable threshold temperature below which the boiler will take itself offline One degree F of hysteresis is provided so as to not toggle offline online at threshold temp 4 Fixed an issue with saving the MIN OFF TIME Values larger than 4 minutes were not saved Revision 3 55 7 March 2014 Pre Release 5 Added the fault error codes to the upper byte of the BOILER STAGECONTROL bits This is to allow HeatNet online to properly decode a fault Revision 3 54 07 Nov 2013 June 2013 Pre Release 07 09 14 1 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 1 The previous version had an issue when the extended post purge of the blower would not keep combustion damper open
21. controlled using a set of contacts to enable it location J4 Enabling Disabling this relay contact can be done using any combination of 3 qualifiers to start the boiler and 4 to stop the boiler These qualifiers are A Modulation 07 09 14 10 Advanced Thermal Hydronics 2004 260 N Elm St Westfield MA 01085 07 09 14 DOC HYDKNHL START menu item The relay contact will close when the MOD from the Master boiler exceeds this value ADVANCE SETUP BASE LOADING START gt MOD STOP menu item The relay contact will open when the MOD from the Master boiler falls below this value ADVANCE SETUP BASE LOADING STOP lt MOD NOTE If the MOD value is set to a value higher than the ADVANCED SETUP MOD MAX LAST FIRE STOP MOD MAX all boilers will be firing before this modulation rate is reached Setting the Modulation to a start value greater than STOP MOD MAX will ensure that all available boilers are firing before the base load boiler relay is enabled Setting the Modulation to a stop value slightly above the min fire rate of the system will ensure that the base load boiler will stop before the first condensing boiler stops This is due to the Modulation rate being close to the min modulation rate before the water temperature exceeds the top of the heating band B Outside Air Temperature 1 START menu item The relay contact will close when the OA T read from the Outside Air Temperature sensor if Equipped
22. cted Revision 1 61 15 DEC 2006 1 This release changed the Heat Link trademark to Heat Net Also the Slave term for boilers was retired and the new association is Member 2 Added functionality for Lonworks and Bacnet 3 If the High Limit tripped on the Master all member boilers are now allowed to fire If flow is lost in the system and the flow switch interlock has been disabled by a wire jumper the master would trip it s operator but if the operator failed it would trip the HIGH LIMIT If the high limit is tripped the member boilers will still be allowed to fire and would then trip on their operating limits or HIGH LIMIT Revision 1 5 Internal release and should not be in end product Revision 1 41 12 OCT 2006 When operating as a Master boiler with no slaves present and in a primary secondary loop setup the internal operating limit works incorrectly If the supply water temperature trips the operating limit the KN series control will attempt to restart the boiler but will abort this attempt within 1 second This is more a nuisance but will cause the blower to come on and then shut off This version corrects this problem 07 09 14 22 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 Revision 1 4 The KN series control can now be calibrated up to 5 1 turndown The default settings remain at 25 but can be adjusted to 20 minimum fire Also a minor bug was corrected with
23. e text now states MINVFD IGN VFD MAX VED These values represent the percentage of signal sent to the VFD Revision 3 2 2 JAN 2009 Preliminary limited release 1 Qualified the System and Local flow sensors so that they must prove flow for 2 seconds This was due to the sensitivity of the flow switch detection inputs Some flow switches would flutter and cause nuisance trips Also some environments that produce strong electrical noise would cause nuisance trips Revision 3 1 5 DEC 2008 Preliminary limited release Begin support of Control Board Version 2 x 1 This release includes support for Version 2 0 control board and its added features while maintaining backwards compatibility with version 1 x control boards Hardware Version 2 x Identified by circuit board color GREEN Control s Additional Features 1 Support for Domestic Hot Water DHW using a 10k Sensor or a dry contact input from a tank thermostat and a Domestic Hot Water relay pump valve There are 5 methods of operation 2 On board power and socket for Protocessor BACnet LonWorks module 07 09 14 16 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 3 HI LO relay control option from connector J4 or Dual Fuel support option using the OPTION input 4 Resettable Fused interlock power circuit 24 VAC 5 Additional terminal connector for H Net shielded cable 6 Backwards compatible to Version 1 x hardware 7
24. ed J12B pin 7 can now accept a low voltage 24vac signal This signal can be daisy chained to each member boiler s J12B pin 7 input using wire Each member boiler must have the Damper enabled in the AUX FUNCTIONS menu so they can each prove the damper before firing while in LOCAL or REMOTE 20 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 W P n Wiring is done beginning with the Master boiler J12B Pins 7 8 are connected to the prove switch of the combustion damper Pin 8 is supplying 24 VAC and pin 7 is the sense input A second wire is connected to J12B pin 7 of the Master and the other end connected to the first member boilers J12B pin 7 If another member boiler is present connect another wire to the J12B Pin 7 terminal of the first member and the other end to the second member boiler J12B pin 7 Continue this method for each additional boiler If using Outdoor reset and during summer shutdown the System Pump will come on if the OA RESET OVERRIDE input is enabled This release does not enable the System Pump during this condition Modified the H NET boiler lost and found communications to be more tolerant Some systems exhibit randomly dropped boilers in electrically noisy environments when all boilers are still present This version attempts to correct this Adjusted the retry method for pump flow failures in order limit the amount of time the Master can call a member bo
25. eeds to occur The K1 relay will always get tapped A log entry of START FAILED RETRY will also be entered for each attempt Corrected a display issue while in the Run Screen with DELTA TEMP Base temperature calculations are always performed in degrees F and then converted to degrees C If the temperature scale is set to C the difference F temperature was being converted to C Now the DELTA TEMP is calculated as the difference temperature in degrees C rounded to the nearest degree This display issue was also present in the HEAT EXCHANGER EXCHGR DELTA menu and the fault message when the delta T was exceeded Changed the CALL FACTORY message to CALL SERVICE DOC HYDKNHL Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 07 09 14 Revision 3 43 16 JAN 2010 Release This revision brings 2 major features to the Heat Net control 1 A The first feature uses Heat Net to allow mixing of CONDENSING NON CONDENSING BASE LOAD or other combination of 2 functional boiler types This feature provides conditional firing based on a priority set of boilers utilizing 2 priority levels B The second feature allows BASE LOADING of boilers without Heat Net This feature provides the ability to control 1 base load boiler using an OPTION relay version 2 x controls only It can also be used with A above for more control configurations The Heat Net method of BASE LOADING al
26. expires the Master resumes control of the modulation in order to maintain setpoint temperature Revision 2 46 10 July 2008 1 Allow a longer post purge on the Master s local pump valve when a member boiler is called to prevent deadheading When the MASTER PUMP VALVE option was set to ON the pump valve post purge time was 5 seconds it is now the post purge time of the local pump that was set in the local pump menu This was a problem when using valves Example When the Master s valve is open with no boilers firing and a Member boiler is called the Master s valve would close and the Member boilers valve would open The Master s valve was only given 5 seconds post purge to remain open thus not allowing the Member boiler s valve to fully open This would cause a deadhead situation for the time that the Member boilers valve was opening Revision 2 45 15 APR 2008 1 07 09 14 Provided additional support for dampers that are individual or have a linked common system damper Added a continuous retry time of 10 minutes and removed the lockout on a damper failure In the SETUP AUX FUNCTIONS COMBUST AIR DAMPER you can now select the damper TYPE There are two types of dampers that are supported now 1 TYPE LINKED COMMON setting is used if only one damper is present If the damper fails to prove when using this setting the boiler system will be shut down Every 10 minutes a retry of the damper will be attempted until
27. hen the OA temperature is greater than the Mixed Boiler Outdoor Air Temperature setting RET lt 140F The condensing boilers Priority 1 are started when the Return water temperature is less than the Mixed Boiler Return temperature setting Setting This may not applicable in most configurations since the local return temperature on the Master is used to provide a difference temperature across the heat exchanger However the return temperature sensor may be moved on the Master to provide system return temp if the difference temp is not required 07 09 14 7 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 07 09 14 Note The condensing boiler set Priority 1 has a higher priority to fire when one of these conditions is met STOP PRIORITY 1 SET Selections always the highest runtime first LAST The condensing boilers Priority 1 are always stopped LAST OAT lt I15F The condensing boilers Priority 1 are stopped first when the OA temperature is less than Mixed Boiler Outdoor Air Temperature RET gt 140F The condensing boilers Priority 1 are stopped first when the Return water temperature is greater than the Mixed Boiler Return temperature setting This may not applicable in most configurations since the local return temperature on the Master is used to provide a difference temperature across the heat exchanger However the return temperature sensor may be moved on the Master to provide
28. iler that is exhibiting flow failures with it s flow prove switch This event would occur mainly when using the TRUE RUNTIME rotation Menu changes A Removed the menu items PID and made it a factory adjustment only B Renamed the LOCAL ADDRESS to H NET ADDRESS and the CONSOLE ADDRESS to MODBUS ADDRESS for clarity C Removed the BOILER START TIME menu under MODULAR BOILER SET This menu was used for informational purposes and has been deemed not needed D Removed the EARLY STOP DEGREES menu under MODULAR BOILER SET This menu was used for informational purposes and has been deemed not needed Fixed a bug with the silence switch If the silence switch was pressed while the Beeper was cycling between ON and OFF A narrow window existed that could cause the beeper to stick ON if the silence switch was pressed while in this window OA RESET sensor failure backup Prior to this release if the Outside Air sensor went bad opened or shorted the Master boiler would shut down the system With this release if the Outdoor Air sensor fails the Master boiler reverts to the System Setpoint setting and the system will continue to run The sensor error is displayed audible alarm and the Alarm relay contact are closed Revision 2 1 18 AUG 2007 1 Fixed Pump Post Purge time saved When the Post Purge Time is set to other than default after a power cycle the default values were restored and the saved settings lost The time can now be ch
29. ion will help minimize this condition when a jumper has not been installed Revision 3 41B 21 OCT 2009 Pre Release 1 Corrected a bug when using the FIRING MODE MIN OFF time and with the PUMP OPTIONS PUMP V ALVE OPTION set to ON The Member Boiler reported to the Master that the Member was in Local Override mode rather than Unavailable when the MIN OFF timer was active The result of this was that the local pump valve would shut off on the Master even though no valve was open on a Member This has been corrected with this pre release Revision 3 41A 8 OCT 2009 Pre Release 1 A condition exists using Failsafe Mode and local valves This condition may cause deadheading The conditions A The SETUP PUMP VALVE OPTION is used and REMAINS ON is set to ON B A Member boiler is set to Failsafe mode H NET COMM LOST ON C Master boiler is shut down or it s control fails When the Master boiler fails shuts off it will take 10 minutes for the Member boiler that is operating in Failsafe Mode to enable it s local valve At this time no flow will take place through the member boiler as the Master boiler s valve closes Deadheading will occur without a bypass valve With this revision setting the Member Failsafe boiler SETUP PUMP VALVE OPTION REMAINS ON set to ON will allow the failsafe member to open its local valve sooner Now when this condition occurs the Member boiler that is operating in Failsafe mode H NET COMM LO
30. is now allowed to run in WWS when the OR OVR override input is closed by setting the following new feature to ON This feature is located in the SETUP PUMP OPTIONS SYSTEM PUMP OVR ENAB IN WWS ON When set to OFF the system pump will not come on while in WWS with the OR OVR override input closed This method allows a priority mode with the system pump while in WWS Revision 3 36 3 39 5 MAY 2009 INTERNAL RELEASE 1 Code efficiency changes no changes to functionality Revision 3 35 24 MAR 2009 1 Corrected a damper issue which would leave the Master boiler s damper ON when Member boilers have all stopped and the Master was the last to shut OFF damper INDEPENDENT mode 2 Corrected a FLOW WAIT display issue when the Local Pump has stopped The FLOW WAIT message was displayed when there is no flow and the pump is off Revision 3 34 20 MAR 2009 INTERNAL RELEASE 07 09 14 1 Corrected a field reported bug when the Operating Limit Band overlaps the Heating band The Operating Limit Band should always be set higher than the Heat Band but if a building management system is in direct control of the setpoint this situation can not be avoided The bug occurs when the Operating Limit Band reduces the modulation rate to avoid tripping the Operating Limit but at the same time the PID may also be trying to reduce the modulation rate while in the Heat Band During this conflict the modulation rate could fall below the
31. it successfully opens 17 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 2 TYPE INDEPENDENT setting supports separate independent dampers controlled by each boiler If any damper fails to open the other boilers in the system can still function as long as their dampers open and prove A damper retry of 10 minutes will also be in effect if any damper fails to open and prove Enhanced the manufacturing diagnostics This is for the factory and is embedded with the firmware control program It does not affect operation Changed the default local pump post purge time from 2 to 10 minutes Added a new feature to the 4 20ma input This feature allows the 4 20mA input to function at the highest priority level same as AA input The feature gives an external control the ability to interrupt heating that is being enabled by a HEAT DEMAND or HEAT NET When this mode is active the external control can set modulation directly using the 4 20mA input Use the ADVANCED SETUP 4 20mA INPUT PRIORITY and set the 4 20mA input to HIGHEST priority This can only be set to HIGHEST if the SETPOINTS SETPOINT SOURCE is set to AUTO Be aware that the control cannot be placed in LOCAL mode if this PRIORITY mode is enabled and active Added the adaptive heat exchanger feature to SETUP AUX FUNCTIONS HEAT EXCHANGER When entering this menu the first line will display ADAPTIVE INPUT The second line will display EXCHGR D
32. ition With this release the Master s base load boiler will automatically fire if the Master boiler sees this condition This new feature will not work if a stand alone Member boiler no header sensor is used with a base load boiler 3 During a UV sensor 24 Hour shutdown test the Fail bit would be temporarily set in the Modbus status register This has been corrected with this release Revision 3 49 17 AUGUST 2011 Release 1 Extended the adjustment range of MIN RUNTIME to 750 hours 31 days in ADVANCED SETUP FIRING MODE MIN RUNTIME The old setting was limited to 10 days when TRUE ROTATION MODE is used 2 Added the 0 10Vdc control signal output J4 3 signal and J4 7 ground This signal is output by the Master boiler as a percent function of the number of boilers running and can be used to set the speed of a System Pump using a Variable Frequency Drive Two wires are required and need to be inserted into the J4 3 and J4 7 positions to access this signal Note This signal has a step response and is not linear to the system or boiler s input firing rate The output signal is proportionally mapped to using the equation VFD boilers running total boilers The VFD represents the stepped percentage of boilers running where 07 09 14 2 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 OVdc 0 to 10Vdc 100 If there are 6 boilers in a system and 2 are running the cont
33. long enough The Combustion Air Damper now closes immediately after the extended post purge ends 2 An issue may exist with handshaking between the Ignition control and the HeatNet control During the handshaking the main valve s sensed input on the HeatNet control may detect a flutter Off then On while running or the HeatNet control may detect severe electrical noise This revision forces a shutdown and aborts handshaking if this condition is detected Revision 3 52 26 June 2013 Release 1 Minimized a Calibration display error when switching to running mode from calibration mode Also fixed a display error when switching from Heat Demand to Low Fire The Low Fire value will now be displayed Revision 3 51 6 November 2012 Release 1 The previous version introduced a timing issue that caused USB drive firmware updates to fail on some boards In order to update the firmware it is necessary to use a USB cable and the HeatNet Firmware Update PC software This issue is fixed with this release Revision 3 50 24 January 2012 Release 1 When using a single boiler with a base load boiler the Linked Common damper did not operate properly This issue is fixed with this release 2 When using a base load boiler and there is no Member or Master boiler available to fire the Modulation setting to start the base load boiler will not work This is due to the Modulation value going to 0 when all boilers are in a failed cond
34. m is used to try and keep the water temperature within the heating band but in some applications parallel piping the water temperature may drop suddenly and then stabilize If this occurs the boiler can short cycle Starting too soon and then exiting the top of the band too soon causes the short cycle If this menu item is set to NO the predictive algorithm is not executed and falling below the band is the only way a boiler may start Fixed a bug using a USB Flash Drive to update firmware when 1200 or 2400 BAUD is selected in the communication settings menu Revision 3 40 9 JULY 2009 07 09 14 14 Advanced Thermal Hydronics 2004 260 N Elm St Westfield MA 01085 1 When the HNET control is controlled by a building management system the Modbus Setpoint timer implements a Fail Safe mechanism If communications from the Management system is lost the boiler system runs in Local mode This timer always requires a value to be written to it to keep from timing out and reverting to Local mode Now writing a 0 to the Setpoint Timer will disable this Fail Safe mechanism 2 Added the ability to enable the System Pump while in Warm Weather Shutdown Prior to this release when the boiler system entered Warm Weather Shutdown the system pump was disabled The system pump did not have a priority mode When the OA OVR input override was closed WWS active the override would only allow the local pump to run The system pump
35. on it introduces 6 million BTUs and the Heat Net boilers modulate down to 25 for a total output of 2 million BTUs and running at high efficiency The Heat Net boilers can now trim additionally to the load from 1 6 million BTUs 20 mod to another 8 million BTUs Not Preferred Example of having a larger Base Load boiler that is not of the modulating type If there is a 6 Million BTU Base Load boiler running with 3 2 million BTU Heat Net boilers a short cycling situation will arise when the 3 2 million BTU boilers are running 99 and the Base Load boiler is called on At this point there is a need for approximately 6 million BTUs The 3 smaller boilers will then modulate down to low fire At this point the 3 smaller boilers need to shut off or the Base load boiler needs to shut off There is no overlap A selection for stopping the boiler now needs to be determined Setting the Stop qualifier Modulation to 40 or a low fire rate will shut the Base Load boiler off and allow the 3 smaller boilers to modulate up again short cycle of the Base Load boiler Use the Delay Timer and Min OFF timer Or the Stop qualifier OA T gt xxF may also be used if the system design temperature is known and then let the Base Load boiler cycle off its limits whether a 2 stage Hi Lo or modulating boiler The default setting is for the Base Load boiler to stop first once the water temperature exceeds the top of the heating band The base load boiler is
36. ons When using one of these modes ensure that you connect any DAMPER control or system pump control to safely allow operation with the assumption that the MASTER boiler is DOWN Be aware that the boiler may start without a call for heat in the FATLSAFE MODES These FAILSAFE MODES can be accessed through the SETUP AUX FUNCTIONS FAILSAFE MODES 1 H NET COMM LOST OFF ON This mode allows a member boiler to run in LOCAL if the communications link via the H NET cable is lost This includes the MASTER boiler losing it s Control Communications board or the power on the MASTER is switched OFF If this MODE is set to ON when the member boiler loses it s link heartbeat packet over the H NET cable to the MASTER Boiler this MEMBER will fire to the LOCAL setpoint NOTE The heartbeat packet over the H NET cable needs to be lost for 10 minutes The MEMBER boiler will continue to run at the LOCAL setpoint until communications from the MASTER boiler is re established 2 LOW TEMP OFF SUPPLY HEADER DHW RETURN This mode may be used by the MASTER or MEMBER boiler and can be used as a type of freeze protection In this mode you may select which Sensor you wish to monitor or you may opt to turn this mode OFF If you select a sensor you may then associate it with a temperature at which the boiler will turn ON and fire to setpoint when this LOW TEMP temperature is reached Once the setpoint is reached the boiler will turn OFF Due to delays in proving flo
37. p the Normally Open contacts This feature also requires a rev 2 x control board and can be used on Master or Member boilers It is not applicable in version 1 x control boards no relay The relay K8 with contact connections on J4 2 amp J4 6 has a rating of 0 1 to 1 Amp If the base load boiler is of the modulating type a 4 20mA signal is also provided on J4 pins 1 and 5 J18 will then need to be set to 4 20mA Two additional wires available from the factory will need to be added to the J4 pins at 1 amp 5 Pin 1 is the output of the 4 20mA transmitter and pin 5 is the output This modulating control signal is used to modulate the base load boiler along with the Heat Net boilers in parallel The ADAPTIVE MOD does not function when the base load boiler is added to lower the modulation rate of all boilers The PID will adapt to the newly fired base load boiler and lower its modulation rate with the increase in water temperature BASE LOADING MASTER gt BASE LOAD BOILERS 1 START gt MOD 95 STOP FIRST DELAY TI ME 10mins SYSTEM MASTER gt BO I LER TYPE LOAD F RMWARE OPT I O N BASE LOAD Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 Enable the base load feature by setting 2 ADVANCED SETUP S YSTEM OPTION to BASE LOAD This setting instructs the OPTION Relay to be used as control for a Base Load Boiler 3 The ADVANCED SETUP BASE LOAD BOILERS BASE LOAD
38. r to start and allow modulation This is typically greater than 1 minute The release of the drop down modulation is contingent on the newly fired boiler returning its running status The running status will be sent once the newly fired boiler completes it s main flame proving period Revision 3 41C 2 DEC 2009 Pre Release for review 07 09 14 Added a non volatile flag for enabling disabling the SETPOINT TIMER The prior versions only allowed the timer to be disabled when the power was applied to the boiler or did not allow disabling of the timer The prior version would allow disabling the timer though once the boiler was power cycled the SETPOINT TIMER would be re enabled This version allows permanently setting the SETPOINT TIMER to OFF and would be used when MODBUS BACnet LonWorks communications are implemented The feature is located in ADVANCED SETUP COMMUNICATIONS SETPOINT TIMER If this value is set to OFF the setpoint timer will be disabled and any changes to the setpoint value through the Modbus communications port will be semi permanent When this value set to OFF the Setpoint Timer will not need to be written when the setpoint register is written If power to the boiler is lost the setpoint will still revert back to the Local System setpoint In the ADVANCED SETUP COMMUNICATIONS menu the PARITY name was changed to DATA FORMAT with the selections of A 8NI 8 bits No Parity 1 Stop bit B 8N2 8 bits No Parity 2 S
39. rol signal 33 or 3 3 Vdc This signal could then be applied to a system pump s VFD to control the speed of the pump relative to how many boilers are firing The VFD would need to be set appropriately to allow the correct flow through each boiler In low volume systems sudden temperature changes may occur when the flow is stepped up or down by a large percentage In these situations the ADAPTIVE MOD may need to be disabled and the ORIGINAL KN method used Other adjustments may also be required see manual Currently no failsafe mode is available in the event the Master boiler s control fails If this method is employed a failsafe boiler could be used to override the control signal and enable the system pump s VFD using some external wiring Revision 3 48 9 June 2011 Release 1 2 6 07 09 14 Allow Spanish language build Changed the minimum temperature setting from 150F to 190F on the SETUP OUTDOOR AIR RESET SET OA SETPOINTS WATER TEMP at HIGH OA TEMP This change was done to allow greater range Added the ability to extend the blower s post purge time for up to 10 minutes This setting can be accessed in the SETUP AUX FUNCTIONS HEAT EXCHANGER EXTEND PP TIME The default time is 0 seconds The time may be adjusted to 600 seconds Unlike the 10 second fixed post purge time the extended post purge time may be interrupted by a call for heat If the extended post purge is active an will be displayed next
40. run This version removes the closing of the alarm contact during this condition Revision 2 3 10 DEC 2007 Interim release Revision 2 2 29 OCT 2007 1 Combustion Air Damper issue If the Combustion Air Damper function is used with a common 07 09 14 system damper not individual dampers assigned to each boiler and the proving switch for the damper is only brought to the Master boiler a deficiency exists with proving the damper on member boilers set to LOCAL If a boiler is manually set to LOCAL a proof of damper on that boiler will not occur unless a relay is supplied that would supply a proof of damper and the COMBUSTION AIR IN USE is set to ON Currently any time that a member boiler is placed to the LOCAL position while operating using H NET the master boiler will see this open the damper and prove the damper but if the damper fails the manually overridden boiler will be unaware of the damper s failure and continue to fire unless it has been wired to receive the prove switch from the damper and COMBUSTION AIR IN USE ON In order to provide a means without adding an external relay to use a common damper the input designated as T4 on J12B is now used for this purpose The inputs T3 and T4 and the methods associated with them will be discontinued T1 and T2 inputs will be used to fire the boiler as if it were a 2 stage Low fire and High fire The in between stage firing of 50 and 75 will not be support
41. so provides for TRUE RUNTIME rotation fault detection reporting conditional firing of multiple non condensing boilers with multiple condensing boilers and modulating of non condensing base load boilers The first feature A MIXED boiler priority method may be used to control condensing and non condensing base load or other boiler sets in a system for optimal performance and economy A boiler set can be constructed by simply setting the FIRING PRIORITY on each boiler to be in the set at the same priority Setting all example condensing boilers to the highest priority of 1 and then setting all example non condensing boilers to a priority of 2 will create 2 sets of boilers one condensing and the other non condensing Once this is done the set of condensing boilers will have a firing order that has a higher priority and is independent of the other non condensing set with the lower priority The boiler set with the highest priority can then be fired based on the conditional settings menu The lower priority set will follow FIRING MODE MASTER gt MODE MIXED MIN RUNTIME 10HRs ee pam BOILER TYPE All Boilers in Set j FIRING PRIORITY A Ge Gk Ge HUN 2000 000 BOILER TYPE All Boilers in Set CONDENSING NO gt FIRING PRIORITY 1 MASS MEDIUM l 2000 000 CONDENSING YES MASS MEDIUM Master 2 J 3 4 5 J Priority 1 Priority 2 Condensing Set Non Condensing Set A boiler s firing priori
42. system return temp if the difference temp is not required Note The condensing boiler set Priority 1 has a higher priority to stop when one of these conditions are met Any combination of Start Conditions and Stop Conditions can be used to optimize the mixing of condensing Priority 1 and non condensing boilers Priority 2 for best performance economy The default settings for the start and stop conditions of the condensing set are START PRIORITY 1 gt SET FIRST STOP PRIORITY 1 SET LAST The default start setting always starts the condensing boilers Priority example first except for the lead boiler setting The lead boiler will always start first if enabled unless there is a boiler already running this includes a Member boiler in LOCAL The default stop condition setting always stops the condensing boilers Priority 1 last If prolonging the life of the heat exchanger s on non condensing boilers is very important consider starting the condensing boilers when the RET return water temperature is below 130F This would lead to the non condensing boilers carrying the load when the system temperature stabilizes above 140F since non condensing boilers will start first with the Return water temperature is gt 140F The condensing boilers can then be stopped first when the RET water temperature is above the 140F Remember any combination of the Start and Stop conditions may be applied for best performance economy
43. the console Modbus port During heavy Modbus traffic the Modus port could get confused with the H link port Revision 1 31 The wrong version of 1 3 was sent to manufacturer Version 1 3 is invalid Version 1 31 is as described in Revision 1 3 Revision 1 3 The Setpoint on members blink when operating using H Link The only way to stop this is to hold the BACK key down for 5 seconds and exit the status screen This occurs after a few days of running and is not apparent on a startup The problem was identified as a stack frame problem with memory interrupts with the serial port Revision 1 2 Fixed a minor bug when in calibrate mode If the technician is in calibrate mode they will be able to close the AA terminal and bring the boiler to High Fire The boilers inputs should all have been disabled while in calibrate mode This prevents a building management system from controlling the boiler while in calibrate The ability to control the Max Output setting was added While in calibrate and the Max Output value is selected the boiler runs to high fire The technician can then adjust the Maximum Output and save this value Once saved or aborted the boiler returns to Min Fire Revision 1 1 1 SEPT 2006 Final Release for production All features Active Revision 1 0 1 0K Pre release versions of the KN HL control Used to get field data on test sites Heat Link features only work with 2 boilers 07 09 14 23 Advanced Thermal
44. to STANBY This indicates that the boiler is still ready to run but is completing an extended post purge As always the STATUS screen will display the meaning of the In this case EXTEND PP Changed the default Delta T heat exchanger temperature to 60F and the maximum Delta T to 100F Also removed the menu item to disable the Delta T half fire protection The menu item has been replaced with the EXTEND PP TIME menu These changes may be accessed in SETUP AUX FUNCTIONS HEAT EXCHANGER Added the ability to change the DHW water setpoint along with viewing other variables via Modbus BACnet and LonWorks 1 Added Read Write DHW Setpoint The DHW setpoint is located address 40018 2 Updated description of Setpoint Timer a write to any read write variable now reloads 3 Updated description of System Modulation 4 Added Boiler Status4 Flags 5 Added Boiler DHW Temperatures 6 Added Boiler Modulations 7 Added Operating Setpoint See online Modbus register documentation Fixed issue with display modulation when using Modbus BACnet and LonWorks Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 07 09 14 7 Added a Modulation Maximum hold off when using the AA terminal for High Fire and when using the 4 20 mA input for direct modulation When these demands for heat are used the maximum modulation the boiler can obtain when first starting is equal to the ADVANCED SET
45. top bits C 801 8 bits Odd Parity 1 Stop bit D 8El 8 bits Even Parity 1 Stop bit Corrected a minor display issue in the BLRS FIRING screen When the Master boiler is firing it displays an M indicating this Prior to this release if the Master boiler faults it would display a M and blink a 1 This has been corrected to always display the M and blink 12 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 4 5 Time qualified the User Gas Pressure VFD Low Water Cutoff Ignition Control High Limit and Gas Valve Interlock Alarm s for 2 seconds before they are reported This change was incorporated to minimize falsely reported fault conditions due to electrical noise either radiated or carried on the AC Line When an interlock has been seen by the control inputs as tripped HEATING INTLK will displayed until the interlock is qualified as tripped Narrowed the threshold for auto detection of the temperature sensors During an AC LINE brownout power cycle condition a residual voltage may remain on the open ended inputs where the sensors are attached This may cause the Heat Net Control to detect a sensor when no sensor at that position was connected A sensor which is not connected would then report a fault To work around this condition a jumper wire would be connected across the sensor input that does not have a sensor attached Narrowing the threshold range for auto detect
46. tripped operator on a Member will report back to the Master boiler that it cannot fire and display the HEAT OPL on the Member This will cause the Master to remove the Call For Heat to this boiler The Member boiler will then display STANDBY with no indication of the tripped operator since the Master removed the Call For Heat to this 11 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 boiler With this release a tripped operator will be displayed as HEAT OPL instead of STANDBY if the Hardware Operating Limit interlock opens and STANDBY if the Software Operating Limit trips The STATUS SCREEN will interpret the and display the condition there Revision 3 42 22 DEC 2009 Pre Release for review 1 Fixed an issue with the adaptive modulation mode when a newly started member boiler does not respond in mixed boiler systems ADAPTIVE MOD DROP DOWN ONCALL selected This condition could hold the modulation percentage at the drop down percentage when the newly started member boiler was the last boiler and did not respond with a running or fault condition A timeout period of the ADD BOILER DELAY time is used to release the drop down fixed modulation percent and allow normal modulation if this situation occurs The boiler that did not respond has an operational issue and should be corrected but will not be as apparent now Ensure that the ADD BOILER DELAY TIME is at least long enough to allow a boile
47. ty can be designated as such in ADVANCED SETUP SYSTEM BOILER TYPE FIRING PRIORITY 1 menu on each boiler A priority of 1 is the highest priority a 2 the lowest default is always 2 In the above example condensing boilers and non condensing boilers are used but other combinations may also be used Another example could use 2 small boilers and set them to Priority 1 and then use 3 large boilers and set them to Priority 2 Using these priority settings with the conditions menu the small boilers can run first during the shoulder months and the larger boilers can fire last during the colder season base loading set Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 Before the MIXED method can be used the firing mode on the Master boiler must be set to MIXED ADVANCED SETUP FIRING MODE MODE MIXED Pressing the SELECT key when the cursor is pointing to MIXED will enter the conditions menu The Start and Stop conditions for starting and stopping priority boiler sets may be configured here Temperatures are adjustable Once the conditions menu has been entered the firing order and stop order of the priority boiler set can be selected based on up to 3 conditions each in the conditional settings menu All conditional settings apply to the priority boiler set When the conditional settings do not apply to the priority 1 set the conditional settings will apply to the priority 2 boiler set
48. w when opening valves a new menu item has been added This menu is the FLOW PROVE It may be accessed in SETUP PUMP OPTIONS and allows for an adjustable flow proving time before the boiler can start It is adjustable from 10 240 seconds and should allow most valves to fully open while attempting to prove flow while they are opening Air Switch BLOWER fault added In the event that the blower is stuck in PRE PURGE for more that 2 minutes the message AIR SWITCH BLOWER will be displayed and the Boiler will alarm and lockout The message CALL FACTORY will be displayed in the event the Ignition Control does not complete a handshaking sequence with the H NET control The boiler will alarm and lockout The 4 20ma input mode has been expanded to allow more control by BMS systems The current method did not allow any flexibility and was not standard practice This has been 19 Advanced Thermal Hydronics 2004 DOC HYDKNHL 260 N Elm St Westfield MA 01085 corrected in this release A new menu item has been added ADVANCED SETUP 4 20ma INPUT Also when selecting SETUP SETPOINTS SETPOINT SOURCE and selecting 4 20ma the 4 20ma INPUT menu will be automatically entered You may now select the current at which the boiler will start It is adjustable from 3 7ma to Sma A bit of hysteresis of 1ma is always in effect So if the starting ma 4 10ma the boiler will start when the control current applied achieves this value of 4 1
49. with the lowest runtime will be fired FIRST example As long as the start condition is met all PRIORITY 1 set of boilers will fire based on runtime Once all PRIORITY 1 set of boilers have fired the PRIORITY 2 set of boilers will fire based on runtime If the Start condition changes and or is not met such as with OA T or RET temp the PRIORITY 2 set of boilers will fire first next based on runtime Stopping Boilers When a boiler is to be stopped water temp is above the heating band the Master checks the Heat Net boilers it has available The Master boiler then looks at which boilers are returning priority firing status set on a boiler in ADVANCED SETUP FIRING MODE MODE MIXED SET LAST example If the Stop condition is met the Master or Member boiler that is configured as PRIORITY 1 with the highest runtime will be stopped LAST example As long as the stop condition is met all remaining PRIORITY 1 set of boilers will stop based on runtime If the Stop condition changes and or is not met such as with OA T or RET temp the PRIORITY 2 set of boilers will stop first next based on their highest runtime Added the ability to control 1 base load boiler using the K8 Relay contacts on J4 pins 2 amp 6 In order to connect to this plug 2 wires with pins are required and inserted in J4 This ability requires these 2 flying leads loose wires available from the factory to be inserted into J4 pins 2 amp 6 These 2 wires then make u

HydroTherm KN Series Firmware Revision Sheet

Contents

Download Pdf Manuals

Related Search

Related Contents