Johnson Controls LSWU User Manual

JOHNSON CONTROLS
193
SECTION 7 – PARAMETER DESCRIPTIONS AND OPTIONS
FORM 145.05-NOM7
ISSUE DATE: 10/31/2019
7
MENU ITEM DEFINITION
STAGED HEAT STATUS - STGS ON
This is a derived value and identies the number of stages of electric heat that
the Primary Unit Controller has energized.
STAGED HEAT STATUS STGS AVAIL
This is a derived value and identies the number of stages of electric heat that
are available.
SUP AIR TEMPERING
This parameter is programmed through the PROGRAM key. This parameter is
used to allow the heat to operate when the unit is in the Occupied Standby or
Occupied Cooling mode to temper the ventilation air entering the space. The
choices are Enabled or Disabled.
SUPPLY AIR TEMP - ACTIVE SP
This is a derived value and is the Supply Air Temperature the Primary Unit Con-
troller is trying to maintain.
SUPPLY AIR TEMP RESET BAS
This value is found under the Service key and identies the supply air tempera-
ture reset signal being communicated from a front end BAS control.
SUPPLY AIR TEMP - CURRENT This is the actual Supply Air Temperature being supplied by the unit.
SUPPLY FAN LOCKOUT LIMIT
When the fan is running and the VFD speed is below Supply Fan Lockout limit
and the fan proving switch is OPEN, all the mechanical systems are inhibited.
When the VFD gets above the limit setpoint and the switch still has not moved,
the unit faults out. This is done through the SETPOINTS key, SUPPLY FAN
subsection.
SUPPLY FAN OUTPUT
This is the binary output from the Primary Unit Controller to the Supply Fan
control system.
SUPPLY FAN STATUS
This is a binary input into the Primary Unit Controller that identies the Supply
Fan is functioning.
SUPPLY FAN VFD FREQUENCY This parameter shows the approximate frequency of the supply fan VFD.
SUPPLY FAN VFD SPEED
This is a derived value that indicates the output, in percent, to the Supply Fan
VFD.
SUPPLY SYS STATUS
This is the active status of the Supply System, display shows Normal-Active;
Normal-Inactive; Safety Trip, Safety Fault, or Safety Lockout.
SYSTEM STOP
This value is found under the Service key and identies if a compressor stop
signal is communicated from a front end BAS system.
UNDERFLOOR SLAB TEMP BAS
This value is found under the Service key and identies the Underoor Slab
Temperature value being communicated from a front end BAS control.
UNDER FLR TEMP BAS
This parameter is programmed through the PROGRAM key and is used to
identify to the Unit Controller that it is to use a communicated value for the
Underoor Air Temp instead of a hard wired input.
UNDER FLR TEMP OVRD
This parameter is programmed through the PROGRAM key. This feature allows
the Unit Controller to energize the heat to dry out underoor space when transi-
tioning from Occupied to Unoccupied or Unoccupied to Occupied mode.
UNDERFLOOR AIR - HUMIDITY
This is a derived value and if the humidity level under the oor of a FlexSys
installation.
UNDERFLOOR AIR TEMP
This is the temperature of the air going to the under oor space in a FlexSys
application
UNDERFLOOR SLAB - DEWPOINT
This is a derived value and is the dewpoint of the air beneath the oor of a Flex-
Sys installation.
UNDERFLOOR SLAB TEMP This is the temperature of the slab beneath the oor of a FlexSys installation.
UNDERFLOOR AIR HUMIDITY BAS
This value is found under the Service key and identies the Underoor Air Hu-
midity value being communicated from a front end BAS control.
UNDERFLR HUMI BAS
This parameter is programmed through the PROGRAM key and is used to
identify to the Unit Controller that it is to use a communicated value for the
Underoor Air Humidity instead of a hard wired input.
TABLE 43 - DEFINITIONS (CONT'D)

Johnson Controls LSWU Specifications

General

Brand	Johnson Controls
Model	LSWU
Category	Chiller
Language	English