Johnson Controls LSWU Startup Guide

JOHNSON CONTROLS
9
FORM 145.05-SU7
ISSUE DATE: 10/31/2019
This start-up guide indicates required field wiring,
connections, and programming to provide proper unit
operation. This guide does not include installation in-
formation. Refer to the Installation, Operation, and
Maintenance manual (Form 145.05-NOM7). Review
the IOM to ensure all proper procedures and safety
precautions are followed when starting this equipment.
Use the IOM as a reference if there are any questions
about the unit operation.
In addition, any system alarms indicated by the User
Interface should be diagnosed as referenced in the In-
stallation, Operation, and Maintenance manual - refer
to the Fault Description Table, located in the Service
section of that manual.
There are three different units that are manufactured
under this configuration: Constant Volume, Variable
Air Volume, and Flexsys Underfloor.
Constant Volume uses a standard supply air fan mo-
tor. Cooling/Heating operations are controlled by a
hardwired or communicated zone sensor. Once operat-
ing, supply air temperature is controlled to a supply air
temperature setpoint.
SECTION 2 - INTRODUCTION
Variable Air Volume uses a Variable Frequency Driven
supply air fan motor that controls the main supply duct
to a predetermined duct static setpoint. Cooling/Heat-
ing operations are determined by return air tempera-
ture control. Once operating, supply air temperature is
controlled to a supply air temperature setpoint.
Flexsys Underfloor systems use a Variable Frequency
Driven supply air fan motor that controls the main
supply duct or an underfloor cavity to a predetermined
duct static setpoint. Cooling/Heating operations are
determined by return air temperature control. Once
operating, supply air temperature is controlled to a
predetermined setpoint. There can be a bypass damper
installed that mixes return and supply air to a mixed air
setpoint in order to prevent overcooling the underfloor
space.
This start-up document guides a technician through the
control, mechanical, and sealed system of the unit to
complete a successful startup.

Johnson Controls LSWU Specifications

General

Brand	Johnson Controls
Model	LSWU
Category	Chiller
Language	English