Background - Honeywell LCBS Applications Manual

— Accessory Loop, Multispeed Fan Control. Each LCBS Connect controller provides the ability to configure custom
control loops to control other equipment including exhaust fans, exhaust pressurization loops, cabinet unit heat-
ers, blower coils, and outdoor lighting circuits based on ambient light level. These loops are called "Accessory
Loops." LCBS Controllers also provide unprecedented control of CVAHU fans that we call Multispeed Fan. This fea-
ture not only ensures building occupant comfort, but when applied properly, results in energy cost avoidance to
building owners.
— Honeywell Cloud Based Remote Control and Service Analytics... A New Honeywell Feature! Data is sent
securely from a building site via the internet to the Honeywell Cloud where extensive analysis is performed. The
output of this analysis is useful information that will allow service contractors to do service more efficiently and
effectively and retain valuable service contracts.

Background

The LCBS Connect system provides comprehensive control options for constant volume air handling units (CVAHU). In
addition to heating, air conditioning, dehumidification, and ventilation applications, critical data from LCBS Connect
controllers is collected, stored, and analyzed in the Honeywell Cloud. The data can be used for logging, sophisticated
graphic display, advanced service alerting and "big data" analytics. Honeywell data scientists and engineers are relying
on hundreds of years of control and service experience to write analytics that will help service contractors assist building
owners to predict and prevent service issues from occurring, resulting in superior equipment uptime and extended HVAC
equipment life. These analytics run in the cloud 24 hours a day, 365 days a year.
Honeywell has an incomparable industry reputation for providing precise temperature control, superior remote and local
operator interface experience. With the addition of cloud based data collection and data analytics, Honeywell steps to the
front again.
The primary focus for LCBS Connect is control of CVAHU rooftop units and split systems. Over 60% of commercial
buildings in North America are heated and cooled by CVAHU packaged and split systems. The average age of this HVAC
equipment is approximately eight (8) to 10 years. Due to lack of appropriate service, many suffer from operational
problems including temperature, pressure, humidity sensing devices that are out of calibration, refrigeration circuits
improperly under and overcharged for a variety of reasons, economizer ventilation cycles that have ceased to function, air
flow systems improperly sized delivering substandard air flow, and thermostats in common buildings that "fight" each
other due to improper occupant intervention.
LCBS Connect. Extending HVAC Equipment Life
The average estimated life of packaged constant volume air handling systems is about 17-25 years, depending on where
the system is located. At eight (8) years, these systems are ripe for 1] restorative service and 2] re-control for reasons
listed above. With service contractor assistance, a user of these systems can delay capital appropriation and expenditure
by up to five (5) years by restoring these units to initial, "as built" specified operation. Restored equipment operates less
resulting in lower energy costs. Ongoing maintenance costs are reduced as "tuned up" equipment operates efficiently and
effectively. After this work is done, Honeywell offers LCBS Connect Cloud Services that will help HVAC service contractors
keep HVAC equipment operating in a highly efficient manner and delivering extended equipment life.
What you will learn by reading this document
Each section consists of three (3) sections. First, "theory and operation" includes a short description about
why we do what we do and how it works. Second, a more complete description of "how it works" is provided.
Third, wiring diagrams are provided to demonstrate how an installer wires up the application. Technically, this
is in the "appendix" of this document.
Controls in Small Commercial Buildings
In commercial buildings, it is essential that heating and air conditioning systems operate in a properly configured,
automatic manner. In a small commercial building, HVAC operational experts are often HVAC service contractor
specialists or by a few subject matter experts within the building. Additionally, control performed in a small commercial
buildings is typically more complex than in a residential dwelling. Heating, cooling, fan operation, ventilation, indoor air
quality, dehumidification, and various other functions can all operate successfully in a small commercial building but due
to economics, we can't count on an experienced controls experts to be present to troubleshoot building controls
problems.
Herein lies a point of concern for servicing contractors and building owners as we strive to effectively control small
commercial buildings. Honeywell and our contractor business partners need to provide basic local control for building
owners. The more power and authority that building occupants have is desirable, but can also lead to undesirable system
operation, particularly higher energy use and HVAC equipment wear and tear. It is important that Honeywell LCBS
Connect contractors to educate building owners about key control requirements.
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LCBS CONNECT SOLUTION
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