Johnson Controls LSWU Startup Guide

JOHNSON CONTROLS
23
SECTION 3 - PRE START-UP CHECKLIST
FORM 145.05-SU7
ISSUE DATE: 10/31/2019
DIGITAL INPUT VERIFICATION
1. Use the information below to prove that the Digi-
tal Inputs (status and safety circuits) are function-
ing correctly. Some may need to be veried after
unit is started.
2. There are two places to verify that the inputs are
correct on the controller. Use either selection be-
low to compare the Digital Inputs on the list be-
low.
a. In the Digital Input section of the SERVICE
key. Push the SERVICE key and move to the
left using the arrow until you see SERVICE
DI PIO on the top left of the screen. Scroll
down to view the DI list.
b. A row of LEDs on the bottom right side of
the board that indicate the DI closure. All
lights light on the closure of the Digital In-
put signal.
All circuits are closed when lights are lit.
The Dirty Filter Switch indicator is lit on
a lter change indication. See Table 3 -
WCSC LED Status Indicators.
On units up to 60 tons the Compressor A
Safety Chain Status shows as FAULTED
until the compressor starts. This is a
normal condition. On units larger than
60 tons the Compressor A Safety Chain
status should always show OKAY unless
FAULTED.
TABLE 3 - WCSC LED STATUS INDICATORS
LED INPUT DESCRIPTION
BI13 Compressor F Safety Chain Status
BI14 Not Used
BI15 Not Used
B16 Not Used
BI9 Compressor B Safety Chain Status
BI10 Compressor C Safety Chain Status
BI11 Compressor D Safety Chain Status
BI12 Compressor E Safety Chain Status
BI1 Air Proving Switch Status
BI2 Dirty Filter Switch Status
BI3 Freezestat Status
BI4 High Duct Static Safety Status
BI8 Compressor A Safety Chain Status
BI7 OCC Input of CTB-1 Status
BI6 SD Input of CTB-1 Status
BI5 Water Flow Switch Status
TABLE 4 - DIGITAL INPUT VERIFICATION CHART
DIGITAL INPUT OKAY/FAULTED/NOT APPLICABLE
Duct High Static Safety
Local Stop
Occupancy State
Safety Input Chain A (See Note 2)
Safety Input Chain B
Safety Input Chain C
Safety Input Chain D
Safety Input Chain E
Safety Input Chain F
Supply Fan Status
Water Flow Switch
Filter Status
HW/Steam Frz Status
NOTE 1: Digital Input operation can also be veried using the LED Status Indicator list.
NOTE 2: The Safety Input Chain for circuit A shows Faulted until the compressor starts on 60 ton or smaller units.

Johnson Controls LSWU Specifications

General

Brand	Johnson Controls
Model	LSWU
Category	Chiller
Language	English