Mestek RBI Torus Series Control Manual
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Mestek RBI Torus Series Control Manual

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This manual is intended only for use by a qualified heating installer/technician. Read and follow this manual, all
supplements and related 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.
Do not use the boiler during construction. Construction dust and particulate, particularly drywall dust, will cause
contamination of the burner, resulting in possible severe personal injury, death or substantial property damage.
The boiler can only be operated with a dust-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.
Affix these instructions near to the boiler. Instruct the building owner to retain the instructions for future use by a
qualified service technician, and to follow all guidelines in the User's Information Manual.
Torus Series
Models:
WB/WW1250, WB/WW1500,
WB/WW2000, WB/WW2500,
WB/WW3000, WB/WW4000
Control Manual
Control Adjustment and
Operation Instructions
Also read and follow:
Torus Series Gas Boiler
Installation and Operating
Instruction Manual
H & HLW
6/2020 Copyright 2020 Mestek, Inc
TRSV3C-IOM-1
82-0962-001
.

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Summary of Contents for Mestek RBI Torus Series

  • Page 1 Affix these instructions near to the boiler. Instruct the building owner to retain the instructions for future use by a qualified service technician, and to follow all guidelines in the User’s Information Manual. 6/2020 Copyright 2020 Mestek, Inc...
  • Page 2 WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY mentioned herein are property of their respective companies. OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT © 2020, Mestek Technology Incorporated, Printed in the U.S.A., All NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, Rights Reserved.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS HeatNet Control V3 Table of Contents Table of Contents ..........................3 Introduction ............................6 V3 H ............................6 ORUS ERIES ONTROL Features & Specifications ........................8 ..............................8 TANDARD EATURES VERVIEW Specifications ............................. 10 Components & Accessories ......................11 ....................................
  • Page 4 DHW M ................................55 AXIMUM UNTIME ..............................56 OADING ELAY ONTROL Using the 4-20 mA input (OPTIONAL) ....................59 ..................................60 ETPOINT RIORITIES Circulator Pump Options ........................60 Local Pump Options ........................... 62 Combustion Air Damper ........................63 Outdoor Reset............................. 63 Sensors ...............................
  • Page 5 TABLE OF CONTENTS HeatNet Control V3 MODBUS Communications ......................114 Worksheet ............................126 Type II Thermistor Resistance/Temperature Table ................ 131 Page 5...

  • Page 6: Introduction

    FEATURES & SPECIFICATIONS HeatNet Control V3 Screen. While performing this task, the control also Introduction monitors dedicated external limits in a limit string and provides an orderly shutdown and fault indication in the event of a tripped limit. The monitored limits include a HIGH LIMIT AQUASTAT, LOW WATER CUTOFF, The Torus WB/WW Series V3 GAS PRESSURE, FLOW, IGNITION CONTROL fault,...
  • Page 7 Features and Specifications HeatNet Control V3 of the Heat Band is breached. Timers are also used to RELEASE timer equals zero, the PID algorithm is allowed prevent short cycling. to control the system modulation. Setting the DELAY RELEASE timer will allow some “soak” time of the newly added boiler before releasing modulation control to the PID.

  • Page 8: Features & Specifications

    FEATURES & SPECIFICATIONS HeatNet Control V3 17. Dual PID controls. One for space heating and one for Features & Specifications DHW heating. Allows for simultaneous DHW/Space heating. Hardware Version 3.x Control Features Standard Features Overview (Identified by circuit board color: BLACK) Five levels of external control inputs, including Support for (2) Circulator pumps.
  • Page 9 FEATURES & SPECIFICATIONS HeatNet Control V3 20. Failsafe mode when a Building Management System is controlling setpoint. If communications is lost, the boiler/system automatically transfers to local boiler setpoint control. 21. Rotation Methods (Lead-Lag): True Rotation (based on boiler runtime) is default. First On First Off (FOFO), Last On First Off (LOFO) and MIXED are optional.

  • Page 10: Specifications

    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 Loading 24 VAC –...

  • Page 11: Components & Accessories

    Components & Accessories Part Number 40-0092 Torus Series Control Board Version 3 SATA Full version 40-0090 Color Touch Panel Display 16-0026 ACI/10K-CP-BP Temperature probe (bullet type, 1x.250 inch) 14-0325 ACI 10k-CP-I-NW Supply, Header, Return Sensors 13-0104 ACI CP-I-2.5” Sensor with well 4”...

  • Page 12: Setup & Operation

    SETUP & OPERATION The Master now checks all of the runtimes to determine Setup & Operation which boiler has the least runtime based on the MIN RUNTIME setting in SETTINGS: FIRING MODE: The Basic Multi Boiler System Operation MIN RUNTIME setting is the minimum runtime interval in hours that is used to compare boiler to boiler runtimes.

  • Page 13: Mixed Boiler Types Using Priority Sets

    SETUP & OPERATION HeatNet Control V3 control module and pre-purge timing commences. The removed (PID discontinuity to modulate from Min Fire to 0 H-Net display indicates “Pre-Purge”. BTUs on a boiler). The timer allows for this loss of BTUs. When purge is complete the ignition control energizes This cycle will continue until the call for heat is satisfied or the gas valve from terminal V1, and the spark is the Warm Weather Shutdown feature is enabled.
  • Page 14 SETUP & OPERATION As long as the start condition for Priority 1 is met, all boilers in the PRIORITY 1 set will fire based on runtime. Once all boilers in the PRIORITY 1 set 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.
  • Page 15 SETUP & OPERATION HeatNet Control V3 Mixed Boilers: Example: Condensing/Non-Condensing Page 15...

  • Page 16: Start/Stop Priority Conditions

    CONTROL METHODS HeatNet Control V3 In the example Mixed Boilers: Condensing/Non- The Return water temperature is below 140F and condensing occurs. (The Master’s system return water Condensing, condensing boilers and non-condensing boilers are used, but other combinations may also be used. Another would need to be used.) example could use (2) small boilers and set them to The Outside Air Temperature is above a setpoint...

  • Page 17: Selecting Mixed Boilers

    CONTROL METHODS HeatNet Control V3 The condensing boiler set (Priority 1) has a Base load boilers can also be mixed in the same way as higher Priority to stop when one of these condensing and non-condensing boilers. The base load conditions are met.
  • Page 18 CONTROL METHODS HeatNet Control V3 Fault tolerance allows for one boiler in the Priority 1 system boilers with larger boilers. This works in much the same to fail and any boiler(s) in the Priority 2 system to fail and way as base loading. still provide near linear (continuity) BTU response when adding boilers.
  • Page 19 CONTROL METHODS HeatNet Control V3 Max Input of Priority 1 boiler * (#Priority 1’s) Typical Efficiency of Non-Condensing Boilers Example: (2) Torus1500, (2) Torus 2500 Redundancy: (300 + 500)/1500 = 53% No Redundancy: (300 * 2) + 500) / (1500*2) =36% In this example, if “Redundancy”...
  • Page 20 CONTROL METHODS HeatNet Control V3 Now, if (1) Torus 1500 (one of the Torus 1500s was taken Boiler System Response 1 offline) were used with (2) Torus 2500’s and the Mod-Max (2) Torus 1500s, (2) Torus 2500’s is set to 50%, the Torus 1500 would fire to 750 MBTUs and wait for the Torus 2500 (Boiler System Response 2 graph).

  • Page 21: Mixed System Type 2: Condensing/Non-Condensing

    CONTROL METHODS HeatNet Control V3 a Priority 1 boiler fails when multiple Priority 1 boilers are 1500, used. 1500, 1500 Mixed System Type 2: 2500, 10.5 35:1 1500, 1500 Condensing/Non-Condensing 2500, 2500 In the following examples, condensing boilers will be used with non-condensing mass boilers.
  • Page 22 CONTROL METHODS HeatNet Control V3 Master’s available to fire list. This would effectively keep the non-condensing boiler from firing in a condensing Mod Max mode, but as a result, may not satisfy the system setpoint. Mod Max In order to use this feature, the version 2 board would 1250 1500 1750...
  • Page 23 CONTROL METHODS HeatNet Control V3 SETUP: AUX FUNCTIONS: HEAT EXCHANGER: Boiler System Response 5 LOW TEMP: (2) CK 1500s, (3) MB/MW 2500s No check is made to the return Blr 1 (900 MBTU) Blr 1+2 (1800 MBTU) temperature – boiler remains Blr 1+2+3 (3300 MBTU) Blr 1+2+3+4 (4800 MBTU) online...

  • Page 24: Heating Control Methods

    CONTROL METHODS HeatNet Control V3 Heating Method 3 Heating Control Methods The third method is to allow a remote 4-20 mA or 0-10 VDC signal to control the firing rate (modulation) of the An overview of the (5) methods for controlling the Torus boiler using the 4-20 mA input, along with the 4-20 mA Series boiler are presented here.

  • Page 25: Input Priorities

    CONTROL METHODS HeatNet Control V3 The AA terminal, the FAILSAFE mode active, 4-20 mA at Input Priorities PRIORITY: HIGHEST, and the HEAT DEMAND input The Torus Series control inputs are prioritized so that (LOCAL) on a Member, are the only inputs that will multiple levels of external control can be employed at the override the H-Net control.

  • Page 26: Heating Method 3 4-20 Ma Control

    CONTROL METHODS HeatNet Control V3 Features of the HEAT DEMAND input include: Stage control input The control is designed to predict when to start and stop the boiler and keep the setpoint in, or as close to the control band as possible. If PREDICTIVE START is enabled, the boiler may start when it is in the band and not below it.

  • Page 27: Heating Method 5 Modbus Communications

    CONTROL METHODS HeatNet Control V3 The System Setpoint Timer also needs to be loaded Heating Method 4 AA Input periodically to allow the H-Net system to fallback to HIGH FIRE input Control: The AA input will fire the boiler Method 1 in the event communications is lost from the at HIGH fire (maximum output of the boiler).

  • Page 28: Domestic Hot Water Methods

    CONTROL METHODS HeatNet Control V3 AUTO: will handle normal heating only applications. It Domestic Hot Water Methods may also be used when individual boilers have tanks connected and are controlled with the DHW BOILER? Domestic Hot Water control is supported using (6) methods. set to LOCAL.

  • Page 29: Dhw Method 1: Dhw Heating Only Using A Dhw Master And Member Boiler(S) Employing H-Net

    CONTROL METHODS HeatNet Control V3 DHW Method 1: DHW Heating ONLY using a DHW MASTER and Member Boiler(s) Employing H-Net Example DHW Only, Reverse Return Piping – Method 1. Domestic Domestic Supply Supply Tank Sensor Pressure Reducing Backflow Prevention HeatNet HeatNet HeatNet Water Meter...
  • Page 30 CONTROL METHODS HeatNet Control V3 DHW Method 1 Quick Start Settings DHW METHOD 1: DHW Heating ONLY Using a DHW MASTER and Member Boiler(s) Master (DHW Only) Settings DHW Use Sensor HeatNet Address Master Type Combustion Air Damper Automatic DHW Only Inputs Local/Remote DHW Sensor...
  • Page 31 CONTROL METHODS HeatNet Control V3 Boilers are started as long as the tank’s water temperature is This method requires a 10k thermistor connected to the below the (DHW SETPOINT – LOWER BAND). The first DHW Sensor input of a DHW MASTER, or a stand-alone boiler, and a DHW tank.
  • Page 32 CONTROL METHODS HeatNet Control V3 used to determine when boilers are started along with Set the LOCAL PUMP OFF value to NO. This will the ADD BOILER DELAY TIME. leave the local pump on during a DHW heating cycle (backwards compatibility). Setting this value to YES Next, change the UPPER BAND to the desired will always keep the local pump off.

  • Page 33: Dhw Method 2: Failsafe Combination Dhw And Space Heating With A Master Boiler And Member Boilers Utilizing Valves (Master Type: Combination)

    CONTROL METHODS HeatNet Control V3 DHW Method 2: Failsafe Combination DHW and Space Heating with a MASTER Boiler and Member Boilers Utilizing Valves (Master Type: Combination) In this example the Master is not a DHW boiler. MIN 3X PIPE DIAMETERS MAX 10X PIPE DIAMETERS BETWEEN CENTERS System Pump...
  • Page 34 CONTROL METHODS HeatNet Control V3 DHW Method 2 W/Diverting Valves Quick Start Settings DHW METHOD 2: Combination DHW and Space Heating Using a MASTER Boiler and Member Boiler(s) Employing Diverting Valves Master (Space Heating Only W/Valves) Settings Master Type HeatNet Address DHW Use Sensor Combustion Air Damper Combination...

  • Page 35: Dhw Method 2: Failsafe Combination Dhw And Space Heating With A Master Boiler And Member Boilers Utilizing Pumps (Master Type: Combination)

    CONTROL METHODS HeatNet Control V3 DHW Method 2: Failsafe Combination DHW and Space Heating with a MASTER Boiler and Member Boilers Utilizing Pumps (Master Type: Combination) In this example the Master is not a DHW boiler. MIN 3X PIPE DIAMETERS MAX 10X PIPE DIAMETERS BETWEEN CENTERS System Pump...
  • Page 36 CONTROL METHODS HeatNet Control V3 DHW Method 2 W/Pumps Quick Start Settings DHW METHOD 2: Combination DHW and Space Heating Using a MASTER Boiler and Member Boiler(s) Utilizing DHW Pumps Master (Space Heating Only W/Pumps) Settings Master Type HeatNet Address DHW Use Sensor Combustion Air Damper Combination...
  • Page 37 CONTROL METHODS HeatNet Control V3 This Method highlights the flexibility of the HeatNet If a thermostat is used, the boiler will run to Method 5A system. It works much the same as DHW METHOD 1, until the thermostat input removes the DHW call. If a DHW but also has the ability to provide space heating and temperature sensor is used, the boiler will modulate to failsafe functions.
  • Page 38 CONTROL METHODS HeatNet Control V3 Now, change the LOWER BAND to the space heating boiler stops and then restarts as a desired temperature (DHW SETPOINT – DHW boiler. DHW has priority. LOWER BAND) below which boilers are to be NO CYCLE The DHW algorithm can steal a boiler added.
  • Page 39 CONTROL METHODS HeatNet Control V3 POST PURGE This needs to be set on all boilers. All boilers control their respective DHW pump/valve when they are called to perform DHW heating. SHARING This can be set on any boiler and will how boilers will cycle on/off when they are called to perform DHW Heating.

  • Page 40: Dhw Method 3: Dhw Heating Only, Using A Header Sensor Input

    CONTROL METHODS HeatNet Control V3 DHW Method 3: DHW Heating Only, Using a Header Sensor Input Example: DHW Only Using Header Sensor, Primary/Secondary – Method 3 Domestic Domestic Supply Supply Tank Sensor HeatNet HeatNet HeatNet HNET HNET MASTER MEMBER 2 MEMBER 3 Cold Water Makeup...
  • Page 41 CONTROL METHODS HeatNet Control V3 DHW Method 3 Quick Start Settings DHW METHOD 3: DHW Heating ONLY Using a MASTER and Member boiler(s) Employing H-Net Space Heating PID. Master Settings Master Type HeatNet Address Combustion Air Damper Automatic Automatic Inputs Local/Remote Header Sensor JPS1 Jumper must be cut to service DHW...
  • Page 42 CONTROL METHODS HeatNet Control V3 This method will control a tank temperature when the tank SETTINGS: SETPOINTS: HEAT BAND temperature setpoint needs to be maintained for extended differential. This can be understood by referring periods with minimal cycling. Multiple boilers can be used to the INTRODUCTION section on the via the H-Net, as this method employs the same PID MASTER in the beginning of this manual.

  • Page 43: Dhw Method 4A: Space Heating With Dhw Override Of Setpoint On Master, Using An Aquastat

    CONTROL METHODS HeatNet Control V3 DHW Method 4a: Space Heating with DHW Override of Setpoint on Master, using an Aquastat Example: DHW METHOD 4a Space Heating with DHW Override of Setpoint on Master, using an Aquastat, Primary Secondary, Reverse Return DHW METHOD 4a: Space Heating with DHW Override of Setpoint on Master, using an Aquastat, Primary Secondary, Reverse Return In DHW METHOD 4a, the Master’s Heat Demand input enables space heating by energizing the system pump and maintaining...
  • Page 44 CONTROL METHODS HeatNet Control V3 DHW Method 4a Quick Start Settings DHW METHOD 4a: Space Heating with DHW Override of Setpoint on Master Using an Aquastat Master Settings Master Type HeatNet Address Combustion Air Damper Automatic Automatic Inputs JPS1 Jumper must be cut to Local/Remote OR OVR Header Sensor...
  • Page 45 CONTROL METHODS HeatNet Control V3 This method is for controlling DHW utilizing a tank PUMP PRIORITY Setting this value to YES will thermostat connected to a Master boiler. This method turn OFF the system pump when the DHW setpoint requires a thermostat input to the OR OVR. When the override mode is active.

  • Page 46: Dhw Method 4B: Space Heating With Dhw Override Of Setpoint On Master, Using A Dhw 10K Tank Sensor

    CONTROL METHODS HeatNet Control V3 DHW Method 4b: Space Heating with DHW Override of Setpoint on Master, using a DHW 10K Tank Sensor Example: DHW Method 4b: Space Heating with DHW Override of Setpoint on Master, using a DHW Sensor, Primary Secondary, Reverse Return.
  • Page 47 CONTROL METHODS HeatNet Control V3 DHW Method 4b Quick Start Settings DHW METHOD 4b: Space Heating with DHW Override of Setpoint on Master Using a 10K Tank Sensor Master Settings Master Type HeatNet Address DHW Use Sensor Combustion Air Damper Automatic Automatic Inputs...
  • Page 48 CONTROL METHODS HeatNet Control V3 This method is for controlling DHW utilizing a 10k sensor UPPER BAND This is not used. in the tank connected to DHW TANK (J10A, 9 & 10) of a Master boiler. This method is only available on the PUMP PRIORITY Setting this value to YES will Master boiler since its purpose is to override the setpoint.

  • Page 49: Dhw Method 5A: Local Dhw Tank Heating Using A 10K Tank Sensor

    CONTROL METHODS HeatNet Control V3 DHW Method 5a: Local DHW Tank Heating using a 10k Tank Sensor. Example: DHW Heating to a Local Boiler’s Tank,– Method 5a Domestic Hot Domestic Hot Water Water System Supply Supply Supply Make Up Make Up Tank Sensor Tank Sensor System Pump...
  • Page 50 CONTROL METHODS HeatNet Control V3 DHW Method 5a Quick Start Settings DHW METHOD 5a: Local Tank Heating Using a DHW Tank Sensor Master Settings Master Type HeatNet Address Combustion Air Damper Automatic Automatic Inputs Local/Remote Header Sensor System Return Local Optional Outputs System Pump On...
  • Page 51 CONTROL METHODS HeatNet Control V3 This method is used to provide combination space heating Next, enter the DOMESTIC HOT WATER menu and DHW heating. The boiler may be stand alone or in a on the Master boiler. Go to BOILER MODE and HeatNet configuration.
  • Page 52 CONTROL METHODS HeatNet Control V3 need to be shut down. The DHW pump will be 11. Set the PURGE TO value to TANK. This will energized without the boiler stopping. Once the purge the heat from the boiler into the tank or DHW cycle has completed, the boiler will stop system loop.

  • Page 53: Dhw Method 5B: Local Dhw Tank Heating Using A Thermostat & Hybrid Sensor

    CONTROL METHODS HeatNet Control V3 DHW Method 5b: Local DHW Tank Heating using a Thermostat & Hybrid Sensor. Example: DHW Heating to a Local Boiler’s Tank, Movable Sensor Location – Method 5b Domestic Domestic Supply Supply System Supply Tank Thermostat Tank Thermostat Cold Water Cold Water...
  • Page 54 CONTROL METHODS HeatNet Control V3 DHW Method 5b Quick Start Settings DHW METHOD 5b: Local Tank Heating using a Hybrid Sensor Master Settings Master Type HeatNet Address Combustion Air Damper Automatic Automatic Inputs Local/Remote Header Sensor System Return Local Optional Outputs System Pump On Local Pump On...

  • Page 55: Dhw Method 6: Dhw Using Direct Control

    OPTIONAL FEATURES HeatNet Control V3 Method 5b can also be used in a hybrid mode on Member DHW METHOD 6: DHW using Direct boilers with a thermostat connected to the OR OVR input. Control This will enable DHW heating, and be used instead of having the 10k sensor’s temperature detect when DHW If the control’s SETTINGS: 4-20 mA input is set to heating is needed, but will use a selectable sensor instead...

  • Page 56: Base Loading, Relay Control

    OPTIONAL FEATURES HeatNet Control V3 Base Loading, Relay Control Enable the base load feature by setting: The control has the ability to control (1) base load boiler using the K8 Relay contacts on J4 pins 2 & 6. In order to SETTINGS: BOILER TYPE: OPTION to BASE connect to this plug, (2) wires with pins are required and LOAD.
  • Page 57 OPTIONAL FEATURES HeatNet Control V3 minimizing short cycle conditions and can be set at Not Preferred: SETTINGS: FIRING MODE: MIN OFF TIME. 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 Preferred: running with (3) 2 million BTU HeatNet boilers, a short cycling situation will arise when the (3) 2 million BTU boilers...
  • Page 58 OPTIONAL FEATURES HeatNet Control V3 Setting up base loading Return Water Temperature The base load boiler is 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 START menu item: The relay contact will close to the boiler and (4) to stop the boiler.

  • Page 59: Using The 4-20 Ma Input (Optional)

    OPTIONAL FEATURES HeatNet Control V3 4–20 mA enable connection Using the 4-20 mA input (OPTIONAL) The 4-20 mA 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 60: Setpoint Priorities

    OPTIONAL FEATURES HeatNet Control V3 For Ametek Blowers, the minimum signal to Anytime a new firmware version is uploaded to control the blower will be less than 20%, but the control, these values return to these the display % will be equal to the turndown % defaults.
  • Page 61 OPTIONAL FEATURES HeatNet Control V3 while running: this process is also used in an attempt System Pump connections to re-establish flow. System Flow 2. If PUMP ROTATION is set to PUMP HOURS the Prove Switch PUMP ROTATION will be temporarily set to SYSTEM HOURS.

  • Page 62: Local Pump Options

    OPTIONAL FEATURES HeatNet Control V3 In low volume systems sudden temperature changes may Local Pump Options occur when the flow is stepped up or down by a large percentage. In these situations the SETTINGS: ADAPTIVE MODULATION: MODULATION MODE may need to be MASTER PUMP/VALVE REMAINS ON: This is a special changed from ADAPTIVE and the ORIGINAL KN method feature of the local circulator pump to prevent deadheading...

  • Page 63: Combustion Air Damper

    OPTIONAL FEATURES HeatNet Control V3 Outdoor reset curve, typical Combustion Air Damper WATER TEMPERATURE SETPOINT Relay K5 and the terminal J13 DAMPER is used to control a combustion air damper. J12B.7 & .8 are used to detect the dry contact proof switch from the damper. A proof time of up to 4 minutes can be set before the boiler can start or an alarm condition will occur.

  • Page 64: Sensors

    OPTIONAL FEATURES HeatNet Control V3 The OR OVR (Outdoor Reset Override) input on J12A can be Local Flow Sensor used to override this Outside Air Setpoint and maintain the water setpoint at the LOCAL or SYSTEM SETPOINT value when a contact is closed across this input. This can be used as The Torus boilers come equipped with a flow sensor that sends flow information to the HeatNet control and display’s a Domestic Hot Water demand input.

  • Page 65: Security

    OPTIONAL FEATURES HeatNet Control V3 Security A password can be used to lock out control and setup features. It can be enabled, but is shipped in the disabled state. Save/Restore Configuration Settings In a complex system, there can be a multitude of settings necessary for proper boiler operation.

  • Page 66: Diagnostics

    OPTIONAL FEATURES HeatNet Control V3 Once a file has been selected, a STORAGE LOCATION damper relay will cycle and try to open the damper again. needs to be selected. There are (2) storage locations for the If the H-Net control closes the last interlock string connected new file.

  • Page 67: Communications

    OPTIONAL FEATURES HeatNet Control V3 The system setpoint timer and system setpoint work in Communications tandem to externally control (i.e. a BMS - building management system) the operating setpoint. The setpoint The H-Net control has the ability to communicate using the (countdown) timer should be loaded with a timeout value MODBUS protocol with a building management system.

  • Page 68: Limited Flow Boiler Control Options

    OPTIONAL FEATURES HeatNet Control V3 temperature at this sensor falls below the LOW TEMP When using the BMS GPM register the BTU values are only temperature the boiler will start and fire to its LOCAL calculated to a whole GPM since the BMS GPM register setpoint.
  • Page 69 OPTIONAL FEATURES HeatNet Control V3 flow required for this boiler (it is adjustable). It should a. Set SETTINGS: FLOW METER: ENABLED: YES be = to the lowest flow of the largest boiler in the b. Set SETTINGS: FLOW METER: GLYCOL MIX system).The HIGHEST FLOW &...

  • Page 70: Heatnet Online

    OPTIONAL FEATURES HeatNet Control V3 the system in a date/time format. Also displayed is the HeatNet Online Master boiler log, faults, messages, modulation, and events. To the right of the histogram is the Master Boiler’s log. HeatNet Online is a web based system for fault notification, Since the HeatNet bridge only transmits at 1 minute monitoring and tuning of a HeatNet based system.

  • Page 71: Wiring Connections

    WIRING CONNECTIONS HeatNet Control V3 Wiring Connections Dip Switches and Wiring Wire Strip Length. .42” or 10.67mm. If the terminal blocks are of the screwless type, the wire should be stripped to to .25” or 6.34mm. If the terminal blocks are of the screw type, the wire should be stripped Page 71...
  • Page 72 WIRING CONNECTIONS HeatNet Control V3 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 73 WIRING CONNECTIONS HeatNet Control V3 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 74 WIRING CONNECTIONS HeatNet Control V3 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 75 WIRING CONNECTIONS HeatNet Control V3 Heating Method 5: MODBUS (Optional BACnet or LonWorks bridge — Protocessor) The (2) LEDs on the RJ45 indicate: GREEN: Transmit Data YELLOW: Received Data RJ45 Cat 5 Modbus 3 wire Shielded Modbus Modbus Termination. Enable: Switches DOWN Position. Disable: Switches UP position.
  • Page 76 WIRING CONNECTIONS HeatNet Control V3 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 Interlocks, 24VAC...
  • Page 77 WIRING CONNECTIONS HeatNet Control V3 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) Water Temperature OUT (supply) of Boiler Hot Water Temperature (TANK)
  • Page 78 WIRING CONNECTIONS HeatNet Control V3 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 SENSOR #5*...
  • Page 79 WIRING CONNECTIONS HeatNet Control V3 Using a 4–20 mA 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 Percent of Boilers...
  • Page 80 WIRING CONNECTIONS HeatNet Control V3 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 24 VAC...
  • Page 81 WIRING CONNECTIONS HeatNet Control V3 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 120 Return 120VAC MASTER BOILER System Pump Voltage Return System Pump Voltage Feed System Pump System Pump Contactor...

  • Page 82: Home Screen Navigation

    SCREEN DESCRIPTIONS HeatNet Control V3 Home Screen Navigation This diagram depicts the Home screen and subsequent screens when the right arrow button is pressed. Repeatedly pressing the right arrow button forms a ring of the different screens. These screens are used during normal operation of a boiler or boiler system. Page 82...

  • Page 83: Home Screen

    SCREEN DESCRIPTIONS HeatNet Control V3 Home Screen The Home screen is used to show the main temperatures in graphs along with some ancillary functions The Home Button in the upper left corner when pressed, will always enter the Home screen. Header Temperature DHW Temperature Pointer...

  • Page 84: Home Screen Messages

    SCREEN DESCRIPTIONS HeatNet Control V3 Home Screen Messages Status Line 1: Setpoint Source – Heating Mode Status Line 2: Running Status Status Line 3: Any Fault Information Heating Mode Messages Control Signal An analog control signal on 4-20mA (1) input is controlling fire rate. DHW Tank A DHW thermostat or sensor is being used to fireboiler in a DHW mode Failsafe...

  • Page 85: Setpoint Source Messages

    SCREEN DESCRIPTIONS HeatNet Control V3 Setpoint Source Messages 0-10V Setpoint Settings are configured to allow a 0-10VDC signal to change setpoint. 4-20mA Setpoint Settings are configured to allow a 4-20mA signal to change setpoint. DHW Setpoint The DHW sensor is controlling the setpoint for DHW heating. Local Setpoint Boiler is watching the Local Setpoint.
  • Page 86 SCREEN DESCRIPTIONS HeatNet Control V3 Failsafe: Low DHW The boiler has entered Failsafe mode due to a low DHW temperature. Temperature Failsafe: Low The boiler has entered Failsafe mode due to a low Header temperature. Header Temperature Failsafe: Low The boiler has entered Failsafe mode due to a low Return temperature. Return Temperature Failsafe: Low...
  • Page 87 SCREEN DESCRIPTIONS HeatNet Control V3 Input is Reduced If a stack sensor is used and temp exceeds limits. due to Stack Temperature Minimum off Time The Minimum Off Time has been set on the boiler. During this time the boiler has taken itself is Active offline from the Master.
  • Page 88 SCREEN DESCRIPTIONS HeatNet Control V3 Running The boiler is running and heating water. The Main Valve is open or this is the called for % of input. Running 100% The boiler is calling to run at 100% modulation. Shorted *** The *** indicates the temperature sensor which has shorted.
  • Page 89 SCREEN DESCRIPTIONS HeatNet Control V3 Waiting for This is the Damper proving time when the damper relay closes until the Damper prove interlock closes on J12B.7 & J12B.8. Damper to open Waiting for Flow This is the flow proving period that is in effect when starting the boiler. The pumps/valves would have been called on prior to this message.
  • Page 90 SCREEN DESCRIPTIONS HeatNet Control V3 Master Boiler Status Screen The above screen on the Master boiler displays the start and stop timers that are used to bring on boilers below and shed them above the heating band. When the Header temperature is below the band, the Heat Start Timer (Add Boiler Delay Timer) is started.
  • Page 91 SCREEN DESCRIPTIONS HeatNet Control V3 On the Home screen, information on each boiler can be accessed by pressing a boiler’s button. Pressing any of the Member buttons will bring up a Member’s informational screen. Limited information is Pressing The Master boiler’s button will bring up the available for a Member from the Master boiler, including Master’s information screen.

  • Page 92: Calibration

    CALIBRATION HeatNet Control V3 press the ‘X’ key to throw out the setting or the check key to Calibration save. All Faults must be cleared before The calibration of the Torus Series boiler adjustments can be made. should only be performed by a licensed/Certified technician.

  • Page 93: Log Entry

    LOG ENTRY HeatNet Control V3 The top line, left corner indicates any condition that caused Log Entry the event. This may be a fault (such as to indicate a sensor that has failed.) or general event as denoted by “Event”. The top line, right corner displays the time and date the event occurred.

  • Page 94: Control Settings Menu

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 Control Settings Menu To Enter the Settings menus the first boiler button must be selected. The button is highlighted by the red box. Next, press the Settings box as also illustrated by the red box. The Settings Menu Page 1 will then be displayed.

  • Page 95: Control Settings Menu

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 Control Settings Menu — Page 1 DEFAULT MENU RANGE DESCRIPTION VALUE # OF BOILERS 1-16 If operating as a member. # of first boiler to run, determines the fire order in rotation. A 0 LEAD BOILER # 0-16 disables the Lead Boiler function.
  • Page 96 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 If set to YES, the boiler /system shuts down when the temperature WARM WEATHER SD ON/OFF exceeds the WWS SETPOINT. Temperature at which boiler shuts down, operation is below this. If boiler is running using either OA RESET or WWS and the OR 68 F 40 –...
  • Page 97 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 Priority mode for the system pump while in Warm Weather Shutdown. ON: The system pump is allowed to run in WWS when OVERRIDE ENABLED the OR OVR override input is closed. When set to OFF, the system IN WARM WEATHER ON/OFF pump will not come on while in WWS with the OR OVR override...
  • Page 98 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 COMBUST AIR DAMPER The LINKED/COMMON setting allows one common damper to be used and controlled by the Master Boiler. All Member boilers must LINKED/ LINKED/COMMON have their damper prove inputs wired as per Figure 56, Common TYPE COMMON INDEPENDENT...
  • Page 99 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 FAULT will stop the boiler when the Delta T has exceeded its setting. ALARM TYPE WARNING FAULT, WARNING WARNING will allow the boiler to continue running, but produce the Warning message. *Settings are AUTO if running DELTA HIGH/LOW protection.
  • Page 100 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 PAGE 1 Setting this value to LOCAL or COMBINATION enables the DHW PID. Setting this value to AUTO disables the DHW PID. LOCAL allows the boiler to run in DHW locally off of its own sensor or thermostat input.
  • Page 101 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 CYCLE allows the boiler to perform as a space or DHW heating boiler. DHW always has priority and will override (steal) a space heating boiler that is running when none are available to perform DHW heating.
  • Page 102 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 This is the maximum runtime of the boiler when DHW heating. MAXIMUM RUNTIME 120 Minutes 0 - 200 Minutes When this runtime is exceeded, the boiler will either Lockout or re- cycle to the Holdoff Time setting below.

  • Page 103: Control Settings Menu

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 Control Settings Menu — Page 2 CONTROL H-Net Displays method of operation: HeatNet (H-Net) Auto detected, based on the HEADER sensor. If the HEADER sensor is present and is set to TYPEZ, the Torus H-Net MASTER Series control is run as a H-Net MASTER (YES).
  • Page 104 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 If the MASTER TYPE is set to COMBINATION, or the DHW BOILER? setting is set to LOCAL or COMBINATION, the MODULAR BOILER SET is duplicated for each PID. Select SPACE HEATING TABS SPACE HEATING to set the ADD, SHED, MODULATE, and DHW HEATING...
  • Page 105 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 If MODULATION MODE is set to ADAPTIVE on the Master boiler, the Master lowers the system modulation rate of all currently running boilers before a newly started boiler enters the Main Valve state.
  • Page 106 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 This algorithm looks at the size of the band and at what rate the temperature is falling. It then calculates when to start the boiler (knowing its starting time) to ensure the boiler starts within the band. Once the boiler starts, the Add Boiler Delay time starts and continues to expire in and below the band.
  • Page 107 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 The first (4) sensor #’s are reserved as: OUTSIDE AIR, water SUPPLY outlet, water RETURN inlet, and system HEADER OUTSIDE, SUPPLY, temperature. If the HEADER sensor is used (TYPEZ), that boiler RETURN, HEADER, SENSOR performs the tasks of the MASTER boiler.
  • Page 108 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 The MODBUS address is for communicating with Laptop, PC, or 1 – 247 MODBUS ADDRESS other MODBUS capable device, such as a Building Management System. It is the 2nd communication port reserved for host control. 1200, 2400, This is the Baud rate for serial communication from the MODBUS BAUD RATE...
  • Page 109 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 BY BOILER This is the automatic value loaded and will equal the lowest flow LOWEST FLOW 0-500 GPM TYPE required for this boiler (it is adjustable). It should be equal to the lowest flow of the largest boiler in the system.
  • Page 110 DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 When set to DUAL FUEL, input T3/ RESERVED, OPTION input is used to control the DUAL FUEL OPTION relay via K8 contacts on J4.2 &.6. When set to NO OPTION the input T3/RESERVED, OPTION relay K8 on J4.2 &.6 is inactive.

  • Page 111: Control Settings Menu

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 Control Settings Menu — Page 3 If the OK button is pressed, the factory set MIN, IGNITION, and CONFIRM BOX MAXIMUM blower rates will be loaded If the OK button is pressed the factory default setting for all menus CONFIRM BOX are loaded.
  • Page 112 LOCATION 0 will be an allowed storage location. HeatNet Online is an Internet (over Ethernet) connection between a HeatNet control and the Mestek HeatNet Online Web Server. Using this connection, the control board will periodically send messages containing all data to capture the current operational state of the boiler.

  • Page 113: Control Settings Menu

    DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS HeatNet Control V3 Control Settings Menu — Page 4 The IOM Manual button when pressed, loads the Display firmware release PDF of the Boiler’s IOM. The HeatNet Manual button when pressed, loads the Display firmware release PDF of this manual. The All Documents button when pressed, displays all the files available for reading, including the wiring diagrams of the boiler for the Display firmware release.
  • Page 114 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Communications The Torus 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 115 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input/Output Variables (Read/Write) Address Name Raw Data Type Scale Description Valid Values/Range 0 (January) - 11 Set real time clock – month (see SetClock) 40010 SetMonth 8 bit unsigned (December) Set real time clock – day (see SetClock) 1 –...
  • Page 116 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 1 – 31 30010 8 bit unsigned Real time clock day. 0 – 99 30011 Year 8 bit unsigned Real time clock year. 0 –...
  • Page 117 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30049 Boiler01RuntimeLow16 30050 Boiler02RuntimeHigh16 30051 Boiler02RuntimeLow16 30052 Boiler03RuntimeHigh16 30053 Boiler03RuntimeLow16 30054 Boiler04RuntimeHigh16 30055 Boiler04RuntimeLow16 30056 Boiler05RuntimeHigh16 30057 Boiler05RuntimeLow16 Boiler (1 – 16) Runtime seconds High 30058 Boiler06RuntimeHigh16 (Upper) and Low (Lower) 16 bit...
  • Page 118 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30088 Boiler09Status3 30089 Boiler10Status3 30090 Boiler11Status3 30091 Boiler12Status3 30092 Boiler13Status3 30093 Boiler14Status3 30094 Boiler15Status3 30095 Boiler16Status3 ----- The following registers are available starting in firmware version 2.0 ----- 30096 Boiler01SupplyTemp 30097...
  • Page 119 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30126 Boiler15ReturnTemp 30127 Boiler16ReturnTemp 30128 Boiler01CyclesHigh16 30129 Boiler01CyclesLow16 30130 Boiler02CyclesHigh16 30131 Boiler02CyclesLow16 30132 Boiler03CyclesHigh16 30133 Boiler03CyclesLow16 30134 Boiler04CyclesHigh16 30135 Boiler04CyclesLow16 30136 Boiler05CyclesHigh16 30137 Boiler05CyclesLow16...
  • Page 120 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30165 Boiler06Status4 30166 Boiler07Status4 30167 Boiler08Status4 30168 Boiler09Status4 30169 Boiler10Status4 30170 Boiler11Status4 30171 Boiler12Status4 30172 Boiler13Status4 30173 Boiler14Status4 30174 Boiler15Status4 30175 Boiler16Status4 30176 …...
  • Page 121 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30233 Boiler10Modulation 30234 Boiler11Modulation 30235 Boiler12Modulation 30236 Boiler13Modulation 30237 Boiler14Modulation 30238 Boiler15Modulation 30239 Boiler16Modulation This is the current operating or active setpoint.
  • Page 122 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS Input Variables (Read Only) Raw Data Address Name Scale Description Valid Values/Range Type 30373 Boiler5LocalFlow 30374 Boiler6LocalFlow 30375 Boiler7LocalFlow 30376 Boiler8LocalFlow 30377 Boiler9LocalFlow 30378 Boiler10LocalFlow 30379 Boiler11LocalFlow 30380 Boiler12LocalFlow 30381 Boiler13LocalFlow 30382 Boiler14LocalFlow 30383 Boiler15LocalFlow 30384 Boiler16LocalFlow...
  • Page 123 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS — BoilerStatus2 Flags Description Valid Values/Range Disabled – boiler is offline 0 = enabled, 1 = disabled For instance: Minimum off Time, Flow, Local Override, Calibrate etc. Heat Demand 0 = no demand, 1 = demand (1) Alarm An alarm or warning condition has occurred.
  • Page 124 MODBUS COMMUNICATIONS HeatNet Control V3 MODBUS — BoilerStatus3 Flags 0 = off, 1 = on Obsolete 0 = off, 1 = on Obsolete 0 = off, 1 = on reserved for future use reserved for future use reserved for future use reserved for future use reserved for future use reserved for future use...
  • Page 125 MODBUS COMMUNICATIONS HeatNet Control V3 BoilerStatus4 Flags Description Valid Values/Range DHW Enabled (1) 0 = off, 1 = on (menu) DHW Mode had been enabled in the menus. Combustion Air Damper Prove (1) 0 = not proven, 1 = proven Status of Combustion Air Damper Prove Input J12B Call Service Fault 0 = off, 1 = on...
  • Page 126 WORKSHEET HeatNet Control V3 REV 1.x Worksheet SETUP MENU BOILERS # of BOILERS LEAD STAGE HEAT BAND ° SETPOINTS SYSTEM/LOCAL SETPOINT ° OPERATE LIMIT ° OP LIM BAND ° SETPOINT SOURCE OUTDOOR AIR RESET ° OA RESET WARM WEATHER SD WWS SETPOINT °...
  • Page 127 WORKSHEET HeatNet Control V3 PUMP/VALVE OPTION 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 128 WORKSHEET HeatNet Control V3 MAXIMUM RUNTIME DOMESTIC HOT WATER DHW BOILER? DHW SETPOINT LOWER DHW DIFF UPPER DHW DIFF DHW PRIORITY? POST PURGE USE SENSOR? SHARING LOCAL PUMP OFF LOCAL DELAY PURGE TO THE HYB SENSOR: MAX RUNTIME HOLDOFF TIME PUMP ALWAYS ON SYSTEM CLOCK ADVANCED SETUP...
  • Page 129 WORKSHEET HeatNet Control V3 SET: STOP PRIORITY 1 SET: MIN RUNTIME MIN OFF TIME FIRING PRIORITY PREDICT START BASE LOADING BASE LOAD BOILERS: START > MOD STOP DELAY TIME SENSORS SENSOR # OUTDSIDE SUPPLY R E T U R N H E A D E R DHW TYPE 4-20 mA INPUT ANALOG IN CHANNEL:...
  • Page 130 WORKSHEET HeatNet Control V3 SYSTEM CONFIGURE INTERLKS INTRLK ASSIGNMENTS SYSTEM FLOW… ON LOAD FIRMWARE Version: OPTION: BOILER TYPE PRODUCT CONDENSING BTU IN MORE MENUS BLOWER MASS TURNDOWN ALTITUDE CALIBRATION SETTINGS MINIMUM (%) IGNITION (%) MAXIMUM (%) Page 130...
  • Page 131 Type II Thermistor Resistance/Temperature Table Temp C Temp F Temp C Temp F Resistance 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 10,000 341.9...
  • Page 132 260 North Elm Street 7555 Tranmere Drive Westfield, MA 01085 Mississauga, Ontario L5S 1L4 Canada Phone: (833) 265-5371 Phone: (905) 670-5888 Fax: (413) 568-9613 Fax: (905) 670-5782 www.rbiwaterheaters.com...

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