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Honeywell LCBS - User Manual

Honeywell LCBS
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APPLICATION MANUAL
31-00118EFS-01
LCBS Connect Solution
TABLE OF CONTENTS
Introduction .................................................................................................................................................................. 2
Background....................................................................................................................................................................................... 3
Automatic Building Schedules ................................................................................................................................ 4
Scheduling a Holiday .................................................................................................................................................................... 5
Heating, Heat Pump Control .................................................................................................................................... 6
Heating Theory and Operation ................................................................................................................................................. 6
Basic Gas and Electric Heating ................................................................................................................................................ 6
Air to Air Heat Pump ...................................................................................................................................................................... 6
Droop, Comfort and Saving Heat Pump Mode................................................................................................................... 7
Discharge Air Temperature High Limit Control.................................................................................................................. 7
Cooling, Dehumidification, Economizer Control ................................................................................................7
Cooling Theory and Operation.................................................................................................................................................. 7
Cooling Operation .......................................................................................................................................................................... 8
Dehumidification Theory and Operation .............................................................................................................................. 8
Method #1: Cooling On, Cycle Heating ................................................................................................................................. 8
Method #2: Simple Humidification......................................................................................................................................... 8
Method #3: Dehumidification extended cooling minimum run time ....................................................................... 9
Fresh Air Economizer Control .................................................................................................................................. 9
Theory and Operation Economizer ......................................................................................................................................... 9
General Economizer Operation ................................................................................................................................................ 9
Honeywell Integrated Economizer Control Described .................................................................................................... 10
Honeywell Integrated Economizer Control, Climate Zones .......................................................................................... 12
Honeywell Integrated Economizer Control - High Limit and Changeover Strategies........................................ 12
Strategy 1: Differential Enthalpy with Fixed Dry Bulb Temperature Limit .............................................................. 12
Strategy 2: Outdoor Air Enthalpy.............................................................................................................................................. 12
Strategy 3: Differential Temperature ...................................................................................................................................... 12
Strategy 4: Outdoor Temperature ............................................................................................................................................ 12
Low Limit Temperature Override Control ............................................................................................................................. 13
Freeze Stat Operation ................................................................................................................................................................... 13
Advanced Temperature Control Fundamentals..................................................................................................13
Proportional Control and the Concept of Differential and Throttling Range......................................................... 13
Proportional Control...................................................................................................................................................................... 13
Set point and Differential Refresher - On Off, Digital Control ...................................................................................... 14
Integral Action Primer and Refresher Course for Some.................................................................................................. 15
Derivative Control........................................................................................................................................................................... 17
Demand Controlled Ventilation............................................................................................................................... 17
Theory and Operation Demand Controlled Ventilation .................................................................................................. 17
DCV Operation ................................................................................................................................................................................. 17
Adaptive Intelligent Recovery..................................................................................................................................18

Table of Contents

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Honeywell LCBS Specifications

General IconGeneral
Frequency50/60 Hz
ApplicationIndustrial burners
Safety StandardEN 298
Flame DetectionUV
Operating Temperature-20 to +60 °C
Humidity RangeMax. 95% r.H.
Communication ProtocolModbus RTU

Summary

Introduction to LCBS Connect

Occupancy Control

Ensures comfort by scheduling and managing building occupancy for energy savings.

Heating and Cooling Control

Provides three stages of heating/cooling for conventional and heat pump systems.

Economizer Control

Supports nine strategies for using outdoor air to cool building spaces.

Background of LCBS Connect System

Automatic Building Schedules

Occupancy Control Theory and Operation

Details how schedules manage occupancy for comfort and energy efficiency using Adaptive Intelligent Recovery.

Scheduling a Holiday

Heating, Heat Pump Control

Heating Theory and Operation

Explains objectives for heating, protecting equipment, and efficient operation.

Air to Air Heat Pump Operation

Covers heat pump mechanics, reversing valve control, and types of heat pumps.

Heat Pump Modes and High Limit Control

Droop, Comfort and Saving Heat Pump Mode

Describes heat pump performance variations and comfort vs. energy saving modes.

Discharge Air Temperature High Limit Control

Ensures discharge air temperature does not exceed a set limit to protect the unit.

Cooling, Dehumidification, Economizer Control

Cooling Theory and Operation

Outlines objectives for cooling, protecting equipment, and efficient operation.

Dehumidification Theory and Operation

Explains problems caused by high humidity and LCBS Connect's dehumidification strategies.

Dehumidification Methods

Details methods for dehumidification: reheat, direct output, and extended cooling runtime.

Fresh Air Economizer Control

Economizer Theory and Operation

Focuses on using outdoor air for ventilation and cooling, and economizer system components.

Economizer Function Strategies

Describes three high-level strategies for controlling economizer functions.

General Economizer Operation

Integrated Economizer Control

Honeywell Integrated Economizer Control Described

Explains mixed air and high limit control loops for integrated economizer functions.

Honeywell Integrated Economizer Control, Climate Zones

Discusses economizer strategies applicable to different U.S. climate zones.

Economizer Control Strategies

Strategy 1: Differential Enthalpy with Fixed Dry Bulb Temp

Utilizes enthalpy and dry bulb temperature for economizer control in all climate zones.

Strategy 2: Outdoor Air Enthalpy

Employs outdoor air enthalpy for economizer control, simple to deploy across zones.

Strategy 3: Differential Temperature

Uses differential temperature between outdoor and return air for control.

Strategy 4: Outdoor Temperature

Controls economizer based on outdoor air temperature relative to set points.

Economizer Limits and Operation

Low Limit Temperature Override Control

Overrides economizer damper position to prevent low temperature conditions.

Freeze Stat Operation

Provides redundant control to shut down system if freezing conditions are detected.

Economizer Control Summary

Summarizes available ASHRAE Complete economizer control options.

Advanced Temperature Control Fundamentals

Proportional Control and Throttling Range

Explains proportional control, error, set point, and the concept of throttling range.

Proportional and On;Off Control

Proportional Control

Determines output setting based on proportional error and throttling range.

Set point and Differential Refresher

Explains set point and differential relationships for on/off and digital control.

Integral Action Primer

Understanding Integral Control

Demand Controlled Ventilation (DCV)

DCV Theory and Operation

Discusses using CO2 sensors to dynamically adjust ventilation rates for energy savings.

DCV Operation and CO2 Levels

Explains DCV operation, CO2 levels, and their impact on ventilation requirements.

Adaptive Intelligent Recovery

How DCV Works

Explains how DCV uses CO2 sensing to dynamically adjust ventilation rates.

Adaptive Intelligent Recovery Summary

Multispeed Fan

Multispeed Fan Theory and Operation

Covers fan types, variable airflow design, and energy savings from speed variation.

Multispeed Fan Operation

Details methods for controlling fan speed: VFD, two-speed motors, and ECM motors.

Multispeed Fan Control Options

Two Speed Discrete Fan Control

Explains control of two-speed motors using discrete fan outputs.

Two Speed and Multispeed VFD Application

Covers VFD application for changing fan frequency and speed.

VFD Application and ECM Motor

VFD Application and Direct Drive ECM Motor

Details how LCBS Connect controls VFDs and ECM motors for fan speed.

Theory and Operation Accessory Loops

How do Accessory Loops work?

Explains how LCBS Connect accessory loops control various electrical equipment.

Example Heating Blower Coil

Illustrates controlling a heating blower coil with occupancy schedules.

Service Alerting Theory and Fundamentals

Example Outdoor Ambient Lighting

Shows controlling outdoor lighting using a photo sensor.

Accessory Loops Summary

Summarizes the capabilities and planning needed for accessory loop control.

Service Alerting Functionality

How does service alerting work?

Explains how sensors trigger alerts and the importance of selecting specific alerts.

Terminal Load, Zone Demand Alert

Alerts for mismatch between equipment capacity and space demand.

Space Humidity Alert

Monitors space humidity levels to indicate potential cooling system issues.

Specific Alerting Scenarios

Space Zone Carbon Dioxide Level Alert

Alerts for high CO2 levels indicating potential ventilation issues.

Differential Pressure Alerting, Filter Loading

Detects filter loading via pressure drop to indicate maintenance needs.

Alerting Details

Appendix, Wiring Diagrams

Master Points List

Lists configurable and fixed input/output points for the LCBS Connect controller.

Wiring Diagram Categories

Master Application Inventory - All Wiring Diagrams

Provides an overview of all master application wiring diagrams.

Configurable Input and Output Assignments Wiring Diagram

Illustrates configurable input/output assignments for the LCBS controller.

Fixed Input and Output Assignments Wiring Diagram

Two Heat Two Cool Economizer Single Temp Changeover Limit Wiring

Two Heat Two Cool Economizer Differential Enthalpy Changeover Limit Wiring

Two Heat Two Cool Economizer Diff Enthalpy, DCV Wiring

Three Heat Three Cool Multispeed Fan VFD Wiring

Single Stage Heat Pump Economizer Differential Enthalpy Wiring

Two Stage Heat Pump Economizer Differential Enthalpy Wiring

Simple Dehumidification Wiring

Two Speed Fan Discrete Outputs Wiring

Outdoor Ambient Lighting Control Wiring

Sylk Sensor Installation Wiring

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