ATH HEATNET KN Series - User Manual

er/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 injur
e 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.
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.
er/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 injur
e 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.
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.
06/2022 Copyright Mestek, Inc.
Also read and follow:
KN-Series Gas Boiler Installation
and Operating Instructions
This instruction manual applies only to Advanced
Thermal Hydronics firmware version 4.15 on
version 3.x control boards.
To replace firmware on an existing boiler, contact
the factory for assistance.
Cast Iron Condensing Boilers
Models KN-6, KN-10, KN-16,
KN-20, KN-26 and KN-30
Models KN6+, KN10+, KN16+,
KN20+, KN26+, KN30+ and
KN40+
Control Adjustment and Operation Instructions
With Touch Screen Display
KNV3TS-06/2022
KN-Series Virtuoso 10:1
Supplement Control Manual

Summary

Control Manual Operation Instructions

Cast Iron Condensing Boilers - Models KN-6 to KN40+

Details boiler models covered by this control manual.

Control Adjustment and Operation Instructions

Instructions for adjusting and operating the control system.

The KN-Series V3 HeatNet Control

MASTER Boiler Role

Defines the function and responsibilities of the MASTER boiler in a system.

HeatNet Version 3.x Features & Specifications

Standard Features Overview

Provides a summary of the standard capabilities of the control.

Hardware Version 3.x Additional Features

Lists new features and improvements in hardware version 3.x.

KN-Series Plus Additional Features

Secondary Heat Exchanger Pump

Details the function of the secondary heat exchanger pump for efficiency.

Setting Up the Flow Sensor

Flow Prove GPM Adjustment

How to adjust the minimum flow rate required for boiler operation.

Specifications

Components & Accessories

SETUP & OPERATION

Basic Multi Boiler System Operation

Explains how to operate a multi-boiler system using the control.

Mixed Boiler System Operation

Starting and Stopping Boilers

Describes the logic for starting and stopping boilers in a mixed system.

START;STOP PRIORITY CONDITIONS

FIRE FIRST and STOP FIRST Conditions

Defines conditions for prioritizing boiler firing and stopping.

Selecting Mixed Boilers

Mixed System Type 1: High System Turndown

Discusses designing systems for high turndown using mixed boiler types.

Mixed System Type 2: Condensing; Non-Condensing

CONTROL METHODS

Base Loading, Relay Control

Explains how to use a relay to control a base load boiler.

Heating Control Methods

Heating Control Method 1 - Standalone Modulating

Describes controlling a single boiler using a PID algorithm.

Heating Control Method 5 - MODBUS Communications

Details using MODBUS for boiler control via digital communication.

Input Priorities

Priority Levels for Control Inputs

Lists the hierarchy of external control inputs.

Domestic Hot Water Methods

DHW Method 1: DHW Heating ONLY using H-Net

Explains DHW heating using a DHW MASTER and MEMBER boilers via H-Net.

DHW Method 2: Combination DHW and Space Heating

Details combination heating using valves or pumps.

OPTIONAL FEATURES

Using the 4-20 mA input (OPTIONAL)

How to use the 4-20mA input for analog control.

Circulator Pump Options

Configuration options for system and local circulator pumps.

Outdoor Reset

Functionality for adjusting setpoints based on outside air temperature.

USB Features

Procedures for updating system firmware via USB.

Saving and Restoring Configuration Settings

Saving the Settings

Procedure for saving current control settings to a USB drive.

Restoring the Settings

Procedure for restoring saved control settings from a USB drive.

Diagnostics

Blower Protection

Information on protecting the blower motor and its functions.

Failsafe Modes

HeatNet Communications Lost

How the system operates when H-Net communication is lost.

Limited Flow Boiler Control Options

Water Flow Limited Control (BMS)

Limits boiler firing based on system water flow (GPM).

HeatNet Online

WIRING CONNECTIONS

Dip Switches and Wiring

Details dip switch settings and general wire stripping guidelines.

MESSAGING & NAVIGATION

Home Screen Navigation

Explains how to navigate through the various screens on the control.

Home Screen Messages

Explains common messages displayed on the home screen.

Calibration

Adjusting Minimum, Ignition, and Maximum Settings

Steps for calibrating boiler firing rates and ignition settings.

LOG ENTRY

Control Settings Menu

Control Settings Menu - Page 1

Details settings for HeatNet Boilers, Setpoints, and Outdoor Air Reset.

MODBUS COMMUNICATIONS

MODBUS Input;Output Variables

Lists registers for controlling and monitoring boilers via MODBUS.

MODBUS - BoilerStatus Flags

Explains the status flags used for boiler diagnostics via MODBUS.

WORKSHEET

SETUP MENU

A template for recording setup menu parameters.

CALIBRATION SETTINGS

A template section for recording calibration settings.

Type II Thermistor Resistance;Temperature Table

ATH HEATNET KN Series Specifications

General

Series	KN Series
Category	Boiler
Type	Condensing
Fuel Type	Natural Gas
Dimensions (HxWxD)	Varies by model
Weight	Varies by model