351579-YTS-B-0608
6 Johnson Controls Unitary Products
monitoring and control. Much like we need a unique street
address in our homes so we can receive our postal mail or
emergency services, these units also need a unique address so
the central Facilities Management System (FMS) can “talk” to
each unit individually. The Simplicity
®
board has the model and
serial number of the specific unit and has a memory space for a
customer name to be applied. So the entire identification for a
specific unit available to the network could be, for example,
Y2AC04M3KDGABA, NCNM123456, SOUTH OFFICE.
The one-time commands to Override ASCD timers and/or to
start Run Test can be issued by the Test/Reset/Up pushbutton.
When this button is pushed and released within five seconds,
the control will zero all ASCD’s for one cycle.
ACRONYMS
A number of acronyms are used throughout this training
manual. These are specific to the Simplicity
®
control. They are
also used in the Technical Guide and Installation and Operation
manuals. Acronyms are used to refer to input and output
hardware points and software parameters such as timing delays
and setpoints.
The acronyms used throughout this training manual are listed in
the Acronym Table 1. They are described in much more detail
below.
INPUTS
There are two types of hardwired input points on the Simplicity
®
control: Analog and Binary. These may be sensors, feedback,
or adjustable setpoints. Typical analog inputs [AI] include Space
Temperature (ST), Supply and Return Air Temperatures (SAT,
RAT), and Building Pressure Sensor (BPS). The binary inputs
(BI) on the Millennium
®
Simplicity
®
use a dry contact input to
determine the status of a monitored point. Typical BI points are
Fan Status (APS), Filter Status (DFS), and Compressor Status
(HPS1-4, LPS1-4, C1O-4O).
Table 1: Acronyms
Inputs Description
APS Air Proving Switch
IAQ Air Quality (CO2 Sensor)
BAS Economizer
Passes BAS economizer command through to
Economizer output
BPS Building Pressure Sensor
C1O-C4O Compressor Status
DF Dirty Filter Status
DPS Duct Pressure Sensor
FSI Hot Water Coil Freeze Input
G Thermostat input for Fan
GV1-3 Monitors gas valve actuation call
HPS1-4
High pressure switch monitored for
compressor discharge
LPS1-4
Low pressure switch monitored for compressor
suction
Lim 1-3 Over-temperature limit switch from heat stages
OAT Outside Air Temperature
OCC Building Occupied Status
Purge Building Purge input
RAT Return Air Temperature
SAT Supply Air Temperature
SD System Shutdown Connector
OAH Outside Air Enthalpy
RAH Return Air Enthalpy
SSA Setpoint Adjust
ST Space Temperature
W1, 2, 3 Heating Stages from Tstat
Y1,2 3, 4 Cooling Stages from Tstat
Pushbuttons Description
Test/Reset / 'Up 'Test / control reset / Data value increment
Address / 'Down 'Change data / Data value decrement
Alarms / Advance data Show alarms / go to next data point
Program Go to program mode
Real Time Clock Incorporated on the board
Outputs Description
Status LED
Flash to indicate alarm, otherwise
'heartbeat'
Digital displays One 2-character and one 4-character
C1-C4 Cooling Outputs 1 through 4
CF1, 2 Cond Fan Bank 1, 2
ECO Economizer damper output
EXH Exhaust Fan relay output
EXD
Exhaust Air Damper / Exhaust VFD Signal
Output
Fan
Supply Fan relay output [contactor or
permission relay]
H1, 2, 3 Heating Stages 1, 2, and 3 output
HGR Hot gas reheat [future]
HWV Hot Water Valve output
VFD Supply Fan IGV or VFD Signal Output
X Alarm signal
Miscellaneous Description
AI Analog Input
AO Analog Output
BI Binary Input same as
BO Binary Output
CAV Constant Air Volume
VAV Variable Air Volume
VFD Variable Frequency Drive
IGV Inlet Guide Vane
IAQ Indoor Air Quality
PI Proportional-Integral Control
ASCD Anti Short Cycle Timer (Compressor)
Table 1: Acronyms (Continued)
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