Johnson Controls LSWU User Manual

JOHNSON CONTROLS
194
FORM 145.05-NOM7
ISSUE DATE: 10/31/2019
SECTION 7 – PARAMETER DESCRIPTIONS AND OPTIONS
MENU ITEM DEFINITION
UNIT INSTALLED ALTITUDE
The height of the unit in relation to sea level or ground level. Normal range is
between 50–2,000 ft.
UNIT SIZE
This parameter is programmed through the Options key and identies the size
of the unit. The choices are 12 Ton, 16 Ton, 21 Ton, 25 Ton, 32 Ton, 39 Ton, 48
Ton, 50 Ton, 55 Ton, 60 Ton, 72 Ton, 79 Ton, 90 Ton.
UNIT STOP
This value is found under the Service key and identies if a unit stop signal is
communicated from a front end BAS system.
UNIT TYPE
This parameter is programmed through the Options key and identies the type
of unit. The choices are Constant Volume, Variable Volume, or FlexSys.
UNIT-OVERALL STATUS
This is the active status of the Unit. The display shows Local Stop, Run, Unit
Trip, Unit Fault, Unit Lockout.
UNOCC ZONE COOLING SETPOINT
This parameter is programmed using the Setpoints key. This is the temperature
that the Primary Unit Controller compares the actual space temperature to, to
decide when to switch into the Unoccupied Cooling Mode.
UNOCC ZONE HEATING SETPOINT
This parameter is programmed using the Setpoints key. This is the temperature
that the Primary Unit Controller compares the actual space temperature to, to
decide when to switch into the Unoccupied Heating Mode.
UPDATE FLASH
This parameter is programmed under the Service key and is used to update the
software in the Unit Controller from a ash card.
VAV HEAT RELAY
This is a binary output that could be used to signal the VAV boxes to open dur-
ing Morning Warm Up operation.
VENT OVERRIDE
This eld 2 to 10VDC can be used to control the operation of the outdoor air
damper.
VENT SYS STATUS
This is the active status of the Ventilation System. The display shows Normal-
Active, Normal-Inactive, Safety Trip, Safety Fault, Safety Lockout, User Dis-
abled, or None.
VENTILATION CONTROL
This parameter is programmed through the Options key must be set to Fixed
Minimum.
VENTILATION SYSTEM
This parameter is programmed through the PROGRAM key and is used to turn
the ventilation function on or off. The options are User Enabled or User Dis-
abled.
WATER ECONO DELTA
This parameter is programmed through the Setpoints key and establishes the
how far the Entering Water Temp must be below the Mixed Air Temp to make
Waterside Economizer active.
WATER ECONO MIN POS
This parameter is programmed through the Setpoints key and establishes the
minimum allowable position for the waterside economizer valve.
WATER FLOW SWITCH
This parameter is programmed through the OPTIONS key and identies if a
condenser water ow switch has been installed. The options are Not Installed or
Installed.
WATER TEMP ENTERING This is the temperature of the condenser water entering the unit.
WATER TEMP LEAVING This is the temperature of the condenser water leaving the unit.
ZONE TEMP BAS
This value is found under the Service key and identies the Zone Temp value
being communicated from a front end BAS control.
ZONE TEMP CURRENT This is the temperature in the conditioned space.
TABLE 43 - DEFINITIONS (CONT'D)

Johnson Controls LSWU Specifications

General

Brand	Johnson Controls
Model	LSWU
Category	Chiller
Language	English