Mestek HeatNet V3 User Manual

Mestek HeatNet V3 User Manual

For kn series: kn-6, kn-10, kn-16, kn-20, kn-26 and kn-30 cast iron condensing boilers
Table of Contents

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instructional information provided with the boiler. Install, start and service the boiler only in the sequence and methods given in these
instructional information provided with the boiler. Install, start and service the boiler only in the sequence and methods given in these
instructions. Failure to do so can result in severe personal injury, death or substantial property damage.
instructions. Failure to do so can result in severe personal injury, death or substantial property damage.
Do not use the boiler during construction.
Do not use the boiler during construction.
the burner, resulting in possible severe personal injur
the burner, resulting in possible severe personal injur
free air supply. Follow the instruction manual procedures to duct air to the boiler air intake. If the boiler has been contaminated by operation
free air supply. Follow the instruction manual procedures to duct air to the boiler air intake. If the boiler has been contaminated by operation
with contaminated air, follow the instruction manual guidelines to clean, repair or replace the boiler if necessary.
with contaminated air, follow the instruction manual guidelines to clean, repair or replace the boiler if necessary.
x these instructions near to the boiler/water heater. Instruct the building owner to retain the instructions for future use b
x these instructions near to the boiler/water heater. Instruct the building owner to retain the instructions for future use b
service technician, and to follow all guidelines in the User's Information Manual.
service technician, and to follow all guidelines in the User's Information Manual.
Cast Iron Condensing Boilers
Models K N-6, KN-10, KN-16,
KN-20, KN-26 and KN- 30
Control adjustment and operation instructions
for Advanced Thermal Hydronics firmware
version 1.08
This instruction manual applies only to Advanced
Thermal Hydronics firmware version 1.x on version
3.x control boards. Current firmware is backwards
compatible with version 1.x & 2.x boards, but some
current features may not be available. To replace
firmware on an existing boiler, contact the factory
to obtain the original firmware file or for assistance
in applying current firmware to an older version
control board.
Also read and follow:
KN-Series Gas Boiler Installation
and Operating Instructions
er/technician. Read and follow this manual, all supplements and related
er/technician. Read and follow this manual, all supplements and related
Construction dust and particulate, particularly drywall dust, will cause contamination of
Construction dust and particulate, particularly drywall dust, will cause contamination of
KNV3-0214
e boiler can only be operated with a dust-
e boiler can only be operated with a dust-

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Summary of Contents for Mestek HeatNet V3

  • Page 1 KNV3-0214 Cast Iron Condensing Boilers Models K N-6, KN-10, KN-16, KN-20, KN-26 and KN- 30 Control adjustment and operation instructions for Advanced Thermal Hydronics firmware version 1.08 This instruction manual applies only to Advanced Thermal Hydronics firmware version 1.x on version 3.x control boards.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS HeatNet Control V3 1.xx-1 TABLE OF CONTENTS TABLE OF CONTENTS ..........................2 Introduction ............................... 4 KN-S ..............................4 ERIES ONTROL Features & Specifications ......................... 6 ................................ 6 TANDARD EATURES VERVIEW Specifications ............................8 Components & Accessories ........................9 ................................
  • Page 3 Line 4 Log Entries: ..........................87 Information contained in this publication regarding device applications and the like The Advanced Thermal Hydronics name and logo, Mestek name and logo, is provided only for your convenience and may be superseded by updates. It is your KN, HeatNet, and H-Net name and logo are registered trademarks of responsibility to ensure that your application meets with your specifications.
  • Page 4: Introduction

    FEATURES & SPECIFICATIONS HeatNet Control V3 1.xx-1 The HIGH LIMIT circuit is independent of the control and shuts down the ignition Introduction control and the boiler if the control board or other component of the boiler was to malfunction. The control will continue to The KN-Series V3 HeatNet Control function and report the fault, but its ability to control the boiler will end.
  • Page 5 FEATURES & SPECIFICATIONS HeatNet Control V3 1.x 100%. This “boiler efficiency” clamp is defaulted to 70% In a stand-alone installation the Member typically receives and thus limits all of the boilers individual outputs to 70% its command signals internally and operates based upon the until the last boiler fires.
  • Page 6: Features & Specifications

    FEATURES & SPECIFICATIONS HeatNet Control V3 1.x firmware program that always remains resident so that a Features & Specifications factory program can be restored. Primary loading is with a flashdrive. HeatNet Version 3.x Discontinued Support for High Efficiency Ametek blowers. Features 10.
  • Page 7 FEATURES & SPECIFICATIONS HeatNet Control V3 1.x 13. Combustion Air Damper control with proof time, 24. Freeze Protection allowing automatic starting of support for a common combustion air damper. boiler(s) using (2) Failsafe modes. 14. USB/RS485 network plug-in to allow firmware updates 25.
  • Page 8: Specifications

    FEATURES & SPECIFICATIONS HeatNet Control V3 1.x Specifications Control Microprocessor based PID modulating control ( NOT a safety limit ) Environment -40 °F to 140 °F, <90% RH non-condensing Input Power 24 VAC, 500 ma Relays System Pump, Damper, Circulator, Alarm, DHW Pump (v2.x), 8A 250 VAC resistive K8 on J4.2 &.6 for Base...
  • Page 9: Components & Accessories

    Components & Accessories Part Number Component 02-4297 KN-Series Control Board Version 3.x 02-4278 Graphics Display Board 02-3926 Temperature probe (bullet type, 1x.250 inch) ACI/10K-CP-BP 02-4283 Supply, Header, Return Sensors ACI 10k-CP-I-NW 02-4285 Sensor with well ACI CP-I-2.5” 02-4286 Sensor with well ACI CP-I-4” 02-4281 Strap-on sensor ACI 10k-CP-S 02-4280...
  • Page 10: Setup & Operation

    SETUP & OPERATION HeatNet Control V3 1.x RUNTIME setting in ADVANCED SETUP:FIRING SETUP & OPERATION MODE:. The MIN RUNTIME setting is the minimum runtime interval in hours that is used to compare boiler to boiler runtimes. Basic Multi Boiler System Operation Once the boiler to fire has been determined, the Master sends the command over the H-Net cable to fire that boiler For boiler system setup/installations please...
  • Page 11: Mixed Boiler Types Using Priority Sets

    SETUP & OPERATION HeatNet Control V3 1.x 10. If main-flame is detected the H-Net control holds the Mixed Boiler Types Using burner at the low-fire rate for the MODULATION Priority Sets DELAY time period. After this timer expires, the PID allows the boiler to modulate and places the boiler into Using the Basic Multi Boiler System Operation, a MIXED the running state.
  • Page 12 SETUP & OPERATION HeatNet Control V3 1.x configured as PRIORITY 1 with the highest runtime will be A boiler’s firing Priority can be designated as such in: stopped LAST (example). As long as the stop condition and ADVANCED SETUP:SYSTEM:BOILER TYPE:FIRING SHED DELAY time are met, all remaining PRIORITY 1 set PRIORITY : 1 menu on each boiler.
  • Page 13: Start/Stop Priority Conditions

    SETUP & OPERATION HeatNet Control V3 1.x temperature on the Master is used to provide a difference Start/Stop Priority Conditions temperature across the heat exchanger. However, the return temperature sensor may be moved on the Master to provide The following is an example using mixed system return temp if the difference temp is not required).
  • Page 14: Selecting Mixed Boilers

    SETUP & OPERATION HeatNet Control V3 1.x The return water temperature sensor would Desired Effective Turndown. This is the lowest need to be moved from the Master’s return firing rate of the system relative to the maximum firing inlet to the system return. The EXCHGR rate of the system.
  • Page 15 SETUP & OPERATION HeatNet Control V3 1.x Number of boilers * Turndown Ratio = Effective System the min inputs would then need to be divided by the sum of Turndown: 5 * 5:1 = 25:1. the Max Input of the Priority 1 boilers. The effect of this would create a higher turndown.
  • Page 16 SETUP & OPERATION HeatNet Control V3 1.x EXCEPTION NOTES: In the Mixed Boiler System table (line 1), KN6s are set as Priority 1 and KN10’s set as Priority 2. With a MOD MAX Mixing more than two different size/type boilers of 60%, each KN6 can run to 360M (720M total) before a becomes more complex than the scope of this manual KN10 is called ON (Add Delay timer set long enough).
  • Page 17 SETUP & OPERATION HeatNet Control V3 1.x Figure 9 Boiler System Response 2 Figure 11 Boiler System Response 4 (1) KN6, (1) KN20, 60% Mod-Max (2) KN2s, (3) KN6s To correct this would require the KN6 to set the MOD- The above Boiler System Response 4 graph illustrates MAX to roughly 90% (Boiler System Response 3: not as another system where 80% is used as the MOD-MAX...
  • Page 18: Mixed System Type 2: Condensing / Non-Condensing

    SETUP & OPERATION HeatNet Control V3 1.x WESTCAST BOILERS series 28 with the HeatNet option Mixed System Type 2: in the Priority 2 set Condensing / Non-Condensing Figure 12 Mixed Boiler System This mixed system may also have mixed boilers with differing sizes as outlined in the Mixed System Type 1: System Effective...
  • Page 19 SETUP & OPERATION HeatNet Control V3 1.x Figure 15 KN Boiler Btu Chart (MBH) KN10 KN16 KN20 KN26 KN30 200M 400M 600M 1MM 1.6MM 2MM 2.6MM 3MM Input Input 120M 200M 320M 400M 520M 600M 160M 320M 480M 800M 1.3MM 1.6MM 2.1MM 2.4MM 140M 280M 420M...
  • Page 20: Base Loading, Relay Control

    CONTROL METHODS HeatNet Control V3 1.x Enable the base load feature by setting: Base Loading, Relay Control ADVANCED SETUP:SYSTEM:OPTION to BASE LOAD. This setting the OPTION Relay to be used as control for a Base Load Boiler. The control has the ability to control (1) base load boiler using the K8 Relay contacts on J4 pins 2 &...
  • Page 21 CONTROL METHODS HeatNet Control V3 1.x Not Preferred: There is no overlap. A selection for stopping the boiler now needs to be determined. Setting the Stop qualifier; Example of having a larger Base Load boiler that is not of Modulation to 40% or a low fire rate will shut the Base the modulating type: If there is a 6 Million BTU Base Load Load boiler off and allow the (3) smaller boilers to modulate boiler running with (3) 2 million BTU HeatNet boilers, a...
  • Page 22: Setting Up Base Loading

    CONTROL METHODS HeatNet Control V3 1.x Return Water Temperature Setting up base loading START menu item: The relay contact will The base load boiler is controlled using a set of contacts to close to enable the boiler when the RET read enable it (location J4).
  • Page 23: Heating Control Methods

    CONTROL METHODS HeatNet Control V3 1.x Short cycling may occur when a firing rate is sent to a member boiler that would cause the Heating Control Methods supply temperature to raise high enough to trip the operating limit (low flow rate). After An overview of the (5) methods for controlling the KN the supply temperature falls, the boiler would series boiler are presented here.
  • Page 24: Heating Method 1 Heat Demand

    CONTROL METHODS HeatNet Control V3 1.x Priority 2 Figure 18 Heat demand input The HEAT DEMAND input is the next, and provides the means to operate the boiler in LOCAL MODE when an external control is not present, has failed, or needs to be enabled or disabled.
  • Page 25: Stage Control T1-T2

    CONTROL METHODS HeatNet Control V3 1.x 4-20ma control signal to a setpoint mapped between The AA, HEAT DEMAND (LOCAL) input, the H-Net, the 50F and 220F. These (2) temperatures are adjustable to 4-20ma input will all override the stage control inputs. provide a setpoint range.
  • Page 26 CONTROL METHODS HeatNet Control V3 1.x Protocessor option Heating Method 5 MODBUS communications An optional BACnet or LonWorks bridge module can be used to connect the MODBUS network to a BACnet or The fifth method uses an RS485 digital communications LonWorks network.
  • Page 27: Using The 4-20Ma Input (Optional)

    OPTIONAL FEATURES HeatNet Control V3 1.x Figure 24 4–20ma enable connection Using the 4-20ma input (OPTIONAL) The 4-20ma input is designed to operate per the ISA-50.1 standard. It will support Type 2, Type 3, and Type 4 Transmitter/Receiver circuits. The Type 2 and Type 3 circuit may use the supplied +24VDC and 24VDC RET connections (J10B) to power a remote transmitter.
  • Page 28 OPTIONAL FEATURES HeatNet Control V3 1.x For non Ametek blowers, the minimum setting SETPOINT 220F for backwards compatibility with the older of the boiler is calibrated so that the minimum version. NOTE: anytime a new firmware version is uploaded PWM signal to control the Blower motor is to the control, these values return these defaults.
  • Page 29: Circulator Pump Options

    OPTIONAL FEATURES HeatNet Control V3 1.x Figure 26 Local & DHW Pump connections Circulator Pump Options There are provisions for a system pump(s) and a local pump. This is to allow for primary/secondary loop configurations. The system circulator pump is implemented using the K4, K13 RELAY and normally open contacts at J13 SYSTEM PUMP 1 and SYSTEM PUMP 2.
  • Page 30 OPTIONAL FEATURES HeatNet Control V3 1.x prove, the control changes to the first pump and If (2) pumps are available, pump rotation is available. The attempts to prove flow. This cycle will continue rotation of the (2) pumps can be controlled using two indefinitely until flow is established.
  • Page 31: Auxiliary Function Options

    OPTIONAL FEATURES HeatNet Control V3 1.x to the VFD’s input connection. Ensure that the JS1 shunt jumper on the control board is in position 0-10 or 4-20mA as Auxiliary Function Options required. Relay K5 and the terminal J13 DAMPER is used to control a combustion air damper.
  • Page 32: Outdoor Reset

    OPTIONAL FEATURES HeatNet Control V3 1.x when a contact is closed across this input. This can be used as Outdoor Reset a Domestic Hot Water demand input. Another function of the OUTDOOR RESET is the The Outdoor reset feature allows the water setpoint Winter/Summer mode ( (W)arm (W)eather (S)hutdown).
  • Page 33: Communications

    OPTIONAL FEATURES HeatNet Control V3 1.x If a pump fails (flow switch required), or the flow switch The Failsafe boiler must have the LOCAL SETPOINT fails, the boiler will cycle the start condition every 10 minutes set to the same setpoint temperature as the Master in an attempt get the boiler restarted.
  • Page 34 OPTIONAL FEATURES HeatNet Control V3 1.x assumption that the Master is not powered. Also ensure that any other System settings related to outside air temperature sensing and system interlocks are set to provide safe operation. Low Temperature Protection LOW TEMP: OFF, SUPPLY, HEADER, DHW, or RETURN This mode may be used by the MASTER or MEMBER...
  • Page 35: Domestic Hot Water Methods

    OPTIONAL FEATURES HeatNet Control V3 1.x DIFF) and below the DHW SETPOINT. Once the DHW Domestic Hot Water Methods SETPOINT is reached all boilers shut off. This limits the tank temperature to the setpoint + post purge time of the DHW Domestic Hot Water control is supported using (4) methods.
  • Page 36: Dhw Method 1B: Combo Dhw And Space Heating Using A Master Boiler And Member Boiler(S) Employing H-Net

    OPTIONAL FEATURES HeatNet Control V3 1.x set to YES, once the DHW MASTER receives a DHW SETPOINT is loaded and the Master boiler HEAT DEMAND signal, it will call other boilers will target this new setpoint. it has available using H-Net. Setting to NO, Now, change the DHW DIFF to the desired requires no Heat Demand signal, and will only differential.
  • Page 37: Dhw Method 2: Dhw Header Sensor Input

    OPTIONAL FEATURES HeatNet Control V3 1.x Heat Demand signal is present. However, the MASTER will only enable boilers for space heating in response to a Heat Demand signal. Now, there is one more thing to consider, the pump’s post purge time. Dumping the heat from 10.
  • Page 38: Dhw Method 4: Dhw Using Direct Control

    OPTIONAL FEATURES HeatNet Control V3 1.x Set the DHW MASTER to NO. A thermostat can only control (1) boiler. H-Net is not available This can be set in menu: ADVANCED SETUP:4-20mA with a thermostat on the tank. INPUT. It allows a member boiler to be taken offline and Go to the DHW BOILER?, enter and select directly modulated by an external control.
  • Page 39: Wiring Connections

    WIRING CONNECTIONS HeatNet Control V3 1.x Wiring Connections Figure 29 Dip Switches and Wiring Wire Strip Length. If the terminal blocks are of the screwless type, the wire should be stripped to .42” or 10.67mm. If the terminal blocks are of the screw type, the wire should be stripped to .25”...
  • Page 40 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 30 Heating Method 1 H-Net, Master/member RJ45 HeatNet In and Out The (2) LEDs on the RJ45 indicate: GREEN: Transmit Data YELLOW: Received Data HeatNet Boiler to Boiler Communications 3 wire Shielded HeatNet In and Out HeatNet Termination.
  • Page 41 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 31 Heating Methods 2 and 4: AA-High Fire and High/Low, master or member boiler Heating Mode 4: High Fire Close this contact to run boiler at Highfire. Heating Mode 2: Stage Control Inputs. T1 or T2 Closed: Lowfire T1 &...
  • Page 42 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 32 Heating Method 3 4–20 ma/ 0-10 VDC 24 VDC Return Channel 2: Channel 1: 4-20mA/0-10VDC 4-20mA/0-10VDC 24 VDC S6 along with the SETUP:ADVANCED:4-20mA INPUT menu configures the channel for operation. S6 switch 1 DOWN: 4-20mA channel 1 S6 switch 1 UP: 0-10VDC channel 1 S6 switch 2 DOWN: 4-20mA channel 2...
  • Page 43 WIRING CONNECTIONS HeatNet Control V3 1.x Heating Method 5: MODBUS (Optional BACnet or LonWorks bridge — Protocessor) Figure 33 The (2) LEDs on the RJ45 indicate: GREEN: Transmit Data YELLOW: Received Data RJ45 Cat 5 Modbus 3 wire Shielded Modbus Modbus Termination.
  • Page 44 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 34 Relays, Interlocks and Boiler Status The Highest priority SYSTEM FLOW PROVE --------- Low Water Cutoff------------------- Variable Frequency Drive -------- Gas Pressure (High & Low) ----- Spare for user or Factory ------ Operator------------------------------ Water Flow Switch----------------- Factory ------------------------------ Low Voltage...
  • Page 45 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 35 Temperature sensors (REQUIRED) Water Temperature INLET (return) of Boiler All Temperature Sensors are 10k Thermistors. (OPTIONAL) Water Temperature Immersion sensors require a well. Common System Supply (Header) IF CONNECTED, BOILER = MASTER (OPTIONAL) DHW Temperature Domestic (REQUIRED)
  • Page 46 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 36 Typical Single Boiler System HEADER SENSOR (Determines Master Boiler) #4 SYSTEM PUMP LOCAL PUMP OUTDOOR ENABLE #14 ENABLE #8 DHW TANK SENSOR FLOW PROVE #9 FLOW PROVE AQUASTAT #13 North Away From Exhaust DHW TANK RETURN SUPPLY...
  • Page 47 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 37 Using a 4–20ma signal for direct modulation A control signal greater 20mA than 4.2mA (adjustable) will start boiler. Output Range From No Effect Control Control Signal Once boiler starts the control signal must Display input % of control when running drop below 4.01 mA to stop Boiler...
  • Page 48 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 38 Common system damper wiring MEMBER BOILER 2 MEMBER BOILER 1 Connection if Member boiler is running as Failsafe MASTER BOILER NOTE: Ensure that the Combustion Air Damper is enabled on all Boilers for use. SETUP MENU:AUX FUNCTIONS DAMPER Prove Switch...
  • Page 49 WIRING CONNECTIONS HeatNet Control V3 1.x Figure 39 Failsafe common system pump wiring MEMBER BOILER 1 120 VAC Return DPST Relay Add additional relays/ contacts for more boilers System Flow Prove Switch 120VAC 120VAC 120 Return MASTER BOILER System Pump Voltage Return System Pump Voltage Feed System Pump...
  • Page 50: Calibration

    Calibration HeatNet Control V3 1.x Calibration Press the arrow keys until MIN VFD is shown in the display, along with the minimum percentage value at which The calibration of the KN-Series boiler the boiler is to run at min fire. While in Standby (no call for should only be performed by a heat on inputs), the minimum percent may be preset.
  • Page 51: Log Entry

    LOG ENTRY HeatNet Control V3 1.x Valve, Pilot Valve, Blower, and the Ignition alarm). The # Log Entry of boilers that are displayed is limited to 7 if the boiler is the MASTER. If boilers #8 and up need to be viewed, the Boiler Control Pro software will need to be used.
  • Page 52: Default Settings & Menu Item Descriptions - Setup

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x Default Settings & Menu Item Descriptions — SETUP DEFAULT MENU RANGE DESCRIPTION VALUE BOILERS # OF BOILERS (1-16) If operating as a member. LEAD BOILER # (0-16) # of first boiler to run, determines the fire order in rotation. A # of first boiler to run, determines the fire order in rotation.
  • Page 53 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x If ROTATION is set to PUMP HRS, ROTATE TIME is used to switch pumps when the pump’s time difference is greater than ROTATE TIME. Whichever pump has the least time and is at least below the other (pump’s time - ROTATE TIME) will switch to the enabled state.
  • Page 54 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x TIME 12:00AM Time of the day to end the setback OPTIONS Fahrenheit scale is default TEMP SCALE (F or C) Beeps when a key is pressed KEY CLICK SKIP PASSWORD Disables the Password BRIGHTNESS (25, 50,75,100)
  • Page 55 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x in LOCAL. The boiler will continue to run in LOCAL until communications are re-established or this entry is set to OFF. This entry may be set to one of the temperature sensors: SUPPLY, HEADER, RETURN, or turned OFF (default).
  • Page 56: Default Settings & Menu Item Descriptions - Advanced Setup

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x TIME DAY OF WEEK This time needs to be entered at first turn-on and in the event that MONTH power has been lost for more than 3 days. The time is only required for an accurate log entry time-stamp and fault time stamp.
  • Page 57 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x The MOD MAX value is also applied 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;...
  • Page 58 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x BASE LOAD BOILER This setting works in conjunction with the ADVANCED SETUP: BASE LOAD BOILERS: SYSTEM:OPTION setting BASE LOAD. Currently only (1) base load boiler is supported using relay K8 (START>MOD, START >MOD...
  • Page 59 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x Methods section. If the PRIORITY is set to HIGHEST, The 4-20ma input responds at the highest Priority level (same as the AA input). This method may be used by an external control to override the HeatNet control and fire the boiler using this external control (external control override).
  • Page 60 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 1.x backup file. When the Storage location (default is Location 1) is selected the file will be loaded into a permanent storage memory location. Next, the control will reboot and copy this new program into running memory, reboot, load factory defaults, and then reboot again.
  • Page 61: Modbus Communications

    MODBUS COMMUNICATIONS HeatNet Control V3 1.x MODBUS Communications The KN-Series control can be controlled using Modbus commands to Enable/Disable the boiler/system. A connection to the Console Modbus Port on the Communications board is required. The Master Boiler assumes the role of MEMBER, RTU, 192Kb, 8 bits, Even Parity, 1 stop bit, when connected to a BMS (Building Management System).
  • Page 62 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 41 MODBUS Input/Output Variables (Read/Write) Address Name Raw Data Type Scale Description Valid Values/Range Set real time clock – second (see SetClock) 40015 SetSecond 8 bit unsigned 0 – 59 Set real time clock – weekday (see 1 (Monday) - 7 40016 SetWeekday...
  • Page 63 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 42 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30024 Boiler05Status1 30025 Boiler05Status2 30026 Boiler06Status1 30027 Boiler06Status2 30028 Boiler07Status1 30029 Boiler07Status2 30030 Boiler08Status1 30031 Boiler08Status2 30032 Boiler09Status1 30033 Boiler09Status2 30034...
  • Page 64 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 42 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30064 Boiler09RuntimeHigh16 30065 Boiler09RuntimeLow16 30066 Boiler10RuntimeHigh16 30067 Boiler10RuntimeLow16 30068 Boiler11RuntimeHigh16 30069 Boiler11RuntimeLow16 30070 Boiler12RuntimeHigh16 30071 Boiler12RuntimeLow16 30072 Boiler13RuntimeHigh16 30073 Boiler13RuntimeLow16 30074...
  • Page 65 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 42 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30103 Boiler08SupplyTemp 30104 Boiler09SupplyTemp 30105 Boiler10SupplyTemp 30106 Boiler11SupplyTemp 30107 Boiler12SupplyTemp 30108 Boiler13SupplyTemp 30109 Boiler14SupplyTemp 30110 Boiler15SupplyTemp 30111 Boiler16SupplyTemp 30112 Boiler01ReturnTemp 30113...
  • Page 66 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 42 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30143 Boiler08CyclesLow16 30144 Boiler09CyclesHigh16 30145 Boiler09CyclesLow16 30146 Boiler10CyclesHigh16 30147 Boiler10CyclesLow16 30148 Boiler11CyclesHigh16 30149 Boiler11CyclesLow16 30150 Boiler12CyclesHigh16 30151 Boiler12CyclesLow16 30152 Boiler13CyclesHigh16 30153...
  • Page 67 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 44 MODBUS — BoilerStatus2 Flags Description Valid Values/Range Disabled 0 = enabled, 1 = disabled Heat Demand 0 = no demand, 1 = demand (1) Alarm 0 = ok, 1 = alarm Failed 0 = ok, 1 = failed Member Error 0 = ok, 1 = error...
  • Page 68 MODBUS COMMUNICATIONS HeatNet Control V3 1.x Figure 45 MODBUS — BoilerStatus3 Flags reserved for future use reserved for future use reserved for future use reserved for future use This BoilerStatus3 Heat Demand Flag is Heat Demand input. On member boilers, this indicates a “Local Override”. Page 68...
  • Page 69: Troubleshooting

    TROUBLESHOOTING HeatNet Control V3 1.x Situation: Troubleshooting The display is displaying random characters or the control keeps resetting. There may exist a grounding problem with the controller or This section is included as an aide to help troubleshoot one of the boilers, pumps, contactors or other devices problems with the setup and operation of the boiler.
  • Page 70 TROUBLESHOOTING HeatNet Control V3 1.x Minimize the electrical interference by routing the Situation: communications cable away from electrical noise The boilers menu only indicates 1 boiler, but there sources, such as: Motors, ignition controls, are member boilers connected and the amber light contactors etc…...
  • Page 71 TROUBLESHOOTING HeatNet Control V3 1.x Situation: the firing rate is changing, but the display You have forgotten the password. indicates it is running at the same modulation rate. As a last resort, you can turn the controller off, then The Boiler always shows it’s called for firing depress and hold the ESC key while turning it back on.
  • Page 72 TROUBLESHOOTING HeatNet Control V3 1.x and a shielded twisted wire is STRONGLY If the Member boiler is in Local Mode then it also suggested. would not be called and report unavailable to the Master. The HeatNet LonWorks and BACnet bridges plug If the Local flow switch for the Local pump is directly into Revision 2.x+ boards.
  • Page 73: Kn Heatnet Control Advanced Menu Tree - Advanced Thermal Hydronics V3

    TROUBLESHOOTING HeatNet Control V3 1.x Newer firmware versions allow the SETPOINT seconds (10 minutes) to the setpoint timer. If after 10 TIMER failsafe feature to be disabled by writing a zero minutes (5 minutes longer than the normal write interval) the BMS has not written the timer, the saved (0) to the timer.
  • Page 74: Kn Heatnet Control Run Screen

    OPERATION HeatNet Control V3 1.x KN HeatNet Control Run Screen Press the UP or DOWN Arrow Keys MASTER:SYSTEM SET to navigate the display screen. MEMBER: LOCAL SET SYSTEM SET Hold theBACK LOCAL SET SYSTEM SET RUN %100 RUN %100 If the Header Sensor is present the button down menu will display SYSTEM SET, for 5 seconds...
  • Page 75: Kn Heatnet Control Menu Tree - Advanced Thermal Hydronics 3V

    OPERATION HeatNet Control V3 1.x KN HeatNet V3 Control Menu Tree — Advanced Thermal Hydronics HOME SCREEN Press and HOLD BACK SYSTEM SET RUN %100 button down for 5 seconds to enter the 140°F menu screen MAIN MENU SCREEN S E T UP K N 3 0 V 1 .
  • Page 76 OPERATION HeatNet Control V3 1.x KN HeatNet V3 Control Advanced Menu Tree — Advanced Thermal Hydronics ONTROL C C C O O O N N N T T T R R R R O O O D I S T R I B U T E D...
  • Page 77: Worksheet

    WORKSHEET HeatNet Control V3 REV 1.x Worksheet SETUP MENU BOILERS # of BOILERS LEAD STAGE HEAT BAND ° SETPOINTS LOCAL SETPOINT ° OPERATE LIMIT ° OP LIM BAND ° SETPOINT SOURCE OUTDOOR AIR RESET ° OA RESET WARM WEATHER SD WWS SETPOINT °...
  • Page 78 WORKSHEET HeatNet Control V3 REV 1.x REMAINS ON: LOCAL PUMP VFD FLOW PROVE NIGHT SETBACK SETBACK ENTRY ENTRY IS SETBACK ° ° ° ° SETBACK TIME START DAY TIME END DAY TIME OPTIONS TEMP SCALE ° KEY CLICK SKIP PASSWORD BRIGHTNESS LOG/ RUNTIME RUN HOURS...
  • Page 79 WORKSHEET HeatNet Control V3 REV 1.x DHW PRIORITY? POST PURGE DHW MASTER? SYSTEM CLOCK ADVANCED SETUP DISTRIBUTED CTRL CONTROL H-Net MASTER H-NET ADDRESS MODBUS ADDRESS MODULAR BOILER SET ADD BOILER DELAY SHED BOILER DELAY MODULATE DELAY TIME MOD MAX – LAST FIRE ADAPTIVE MOD MOD MODE: DROP DOWN...
  • Page 80 WORKSHEET HeatNet Control V3 REV 1.x PRIORITY PASSWORD COMMUNICATIONS BAUD DATA FORMAT SETPOINT TIMER BLOWER SETTINGS (AMETEK BLOWER) ACCELERATE DECELERATE SOFT START SECS: SYSTEM CONFIGURE INTERLKS INTRLK ASSIGNMENTS SYSTEM FLOW… ON LOAD FIRMWARE Version: OPTION: BOILER TYPE FIRING PRIORITY BTU IN CONDENSING MASS CALIBRATION SETTINGS...
  • Page 81: Thermistor Resistance/Temperature Table

    HeatNet Control REV 3.47-1 Thermistor Resistance/Temperature Table Temp C Temp F Resistance Temp C Temp F Resistance 336,450 2,488 242,660 2,083 176,960 1,752 130,410 1,479 97,072 1,255 72,951 1,070 55,326 915.4 43,326 786.6 32,650 678.6 25,391 587.6 19,899 510.6 15,711 445.2 12,492 389.6...
  • Page 82: Status Information

    HeatNet Control REV 3.47-1 * Status Information Whenever an * is displayed on the RUN screen it indicates that there is more information available about the current running conditions. This information can be viewed by going to the *STATUS screen as shown on the previous page. For more information on the parameters discussed here please see the Default Settings &...
  • Page 83 HeatNet Control REV 3.47-1 Status information screens This screen indicates the control is attempting to re- initiate the ignition control because the ignition control did not begin PRE-PURGE. For more information see CALL SERVICE LOG entry. This screen indicates that the boiler’s has received a heat demand, but it’s MINIMUM OFF time has not expired.
  • Page 84: Status Screen Fault Display

    HeatNet Control REV 3.47-1 Status Screen Fault Display There are numerous interlock switches and software limits that are detected. Each of these, when tripped will produce a display message, an audible beeping, and an LOW WATER CUTOFF: alarm relay closure. The fault is displayed first, then after If there is a low water condition reported by the low water a second, the time the fault occurred is displayed.
  • Page 85 APPENDIX A HeatNet Control REV 3.47-1 OPEN ******* SENSOR : If the open sensor fault is displayed, the sensor in the position reported was originally detected, but has since opened. The boiler will shut down on any OPEN sensor except the OUSTSIDE AIR sensor.
  • Page 86 APPENDIX A HeatNet Control REV 3.47-1 DELTA TEMPERATURE WARNING: If the temperature difference across the boiler and measured from RETURN water to SUPPLY water exceeds “EXCHGR DELTA” this message will be displayed. This can be set to an alarm condition in the AUX FUNCTIONS menu.
  • Page 87: Line 4 Log Entries

    APPENDIX B HeatNet Control REV 1.x Line 4 Log Entries: The following table lists the messages on line # 4 of the log’s display. Line # 4 Message Description SETBACK IS ACTIVE If any of the (4) temperature setbacks are active these log entries will be SETBACK EXPIRED displayed in the log.
  • Page 88 APPENDIX B HeatNet Control REV 1.x Line # 4 Message Description This log entry occurs when the temperature across the heat exchanger has HIGH DELTA TEMP been greater than the EXCHR DELTA T RANGE degrees F. After 24 hours of continuous runtime the ignition control module needs to SHUTDOWN UV TEST check it’s UV detection circuit.
  • Page 89 APPENDIX B HeatNet Control REV 1.x Line # 4 Message Description HEADER SENSOR, DHW SENSOR If a call is made to the ignition control to start and the HeatNet control detects AIR SWITCH(BLOWER) a blower start, but no Pilot within two minutes, the boiler locks out. This log entry indicates that the blower was ON with no flame in the boiler.
  • Page 90 IN UNITED STATES: 260 NORTH ELM ST. WESTFIELD IN CANADA: 7555 AUGA, ONT. www.knseries.com...

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