User's Guide
Cassia™ Energy Management System (EMS)
Instruction Bulletin
Retain for future use.
Cassia™ Energy Management System (EMS)
User's Guide
63249-420-338A1
03/2010
HAZARD CATEGORIES AND SPECIAL SYMBOLS
Read these instructions carefully and look at the equipment to become
familiar with the device before trying to install, operate, service, or maintain
it. The following special messages may appear throughout this bulletin or on
the equipment to warn of potential hazards or to call attention to information
that clarifies or simplifies a procedure.
The addition of either symbol to a “Danger” or “Warning” safety label
indicates that an electrical hazard exists which will result in personal injury if
the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death.
Danger indicates an immediately hazardous situation which, if not
avoided, will result in death or serious injury.
Warning indicates a potentially hazardous situation which, if not
avoided, can result in death or serious injury.
Caution indicates a potentially hazardous situation which, if not
avoided, can result in minor or moderate injury.
Caution, used without the safety alert symbol, indicates a potentially
hazardous situation which, if not avoided, can result in property
damage or improper operation.
NOTE: Provides additional information to clarify or simplify a procedure.
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PLEASE NOTE
Electrical equipment should be installed, operated, serviced, and maintained
only by qualified personnel. This document is not intended as an instruction
manual for untrained persons. No responsibility is assumed by Schneider
Electric for any consequences arising out of the use of this manual.
FCC CLASS B
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:



Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician for
help.
Changes or modifications to this device that are not expressly
approved by Schneider Electric could void the user's authority to
operate this equipment.
© 2009 Schneider Electric. All Rights Reserved.
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INTRODUCTION
The Cassia™ Energy Management System (EMS) is comprised of
EMS Thermostats, Door Sensors, Motion Sensors, and Group
Coordinators. The EMS reduces energy costs by minimizing HVAC
usage when a guest room is unrented or vacant. The EMS allows
continuous monitoring of all online devices within the property.
Figure 1: The Cassia™ EMS System Components
About This Guide
This User's Guide provides instructions and guidelines for operating,
maintaining, and servicing the Cassia™ Energy Management
System (EMS). Refer to the component instruction bulletins for
installation procedures and safety precautions.
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Cassia™ Energy Management System (EMS)
User's Guide
SYSTEM DESCRIPTION
The Cassia™ Energy Management System (EMS) uses the
Zigbee® RF wireless technology allowing a combination of PIR and
door contact sensors to communicate with the wireless in-room
thermostat. The Cassia EMS reduces HVAC operation expense,
provides remote control and monitoring of occupancy habits of
renters, and as an optional feature, turn off lights. The web based
central control software provides added monitoring and command
response that other systems cannot deliver. Because the Cassia
EMS communicates via radio frequency, the ease of installation is
no different than replacing a thermostat or installing a new light
switch. An estimated 25 - 44% energy savings per room can be
achieved in virtually any hotel, dorm, or multi-unit dwelling.
GLOSSARY OF TERMS
Table 1: Glossary of Terms
Term
Definition
Setpoint
The temperature at which a room thermostat has been set. This is
done either automatically by the EMS or manually by a guest.
Global
Settings
Parameters established by a hotel to guide the automatic functions of
the EMS.
Standard
Setback
A global setting for the number of degrees that the thermostat will be
allowed to drift either up or down from the SETPOINT temperature
while the room is Occupied and Rented. (Refer to "Drift")
Setback
A global setting for the number of degrees that the thermostat will be
allowed to drift either up or down from the SETPOINT temperature
while the room is Unoccupied and Rented. (Refer to "Drift")
Deep
Setback
A global setting for the number of degrees that the thermostat will be
allowed to drift either up or down from the SETPOINT temperature
while the room is Unoccupied and Unrented.
Variance
A global setting for the number of degrees that the EMS will allow an
occupied or unoccupied room temperature to change (up or down) from
the SETPOINT temperature before the HVAC system is turned on.
Drift
The number of degrees a room temperature is allowed to change
before the EMS activates the HVAC.
Conditioning
The term used to describe the mode of the EMS when a guest is
checked-in. At that time the EMS system immediately goes into
“conditioning” mode and changes the room thermostat setting to the
“occupied” SETPOINT temperature. The purpose is to ensure that the
temperature is suitable for the guest by the time the room is occupied.
© 2009 Schneider Electric. All Rights Reserved.
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OPERATING THE SYSTEM
The Cassia EMS is designed to maintain occupant comfort while
minimizing HVAC energy usage in room application.
In-room HVAC control for the EMS is provided by a thermostat.
Thermostat temperature settings are automatically changed by the
EMS depending on the room condition which includes: unrented,
rented, occupied or unoccupied. In conjunction with the thermostat
setting, the EMS allows the room temperature to drift up or down
within a configured range of degrees before the HVAC is activated
to bring the temperature back to the target temperature setting. The
range of degrees of the drift varies depending on whether the room
is occupied, unoccupied, rented, or unrented.
Possible scenarios include the following:
 When a guest checks in, the EMS changes the room
temperature setting to the RENTED OCCUPIED setting with a
SETBACK differential.
 When the guest enters their room the EMS changes the
thermostat temperature to the RENTED OCCUPIED setting with
a STANDARD or guest set differential.
 When the guest leaves their room and it remains vacant for 15
minutes, the EMS changes the thermostat temperature to the
RENTED UNOCCUPIED setting and the SETBACK differential
is used.
 If a staff member changes the thermostat setting when a guest
is checked into the room the STANDARD setback will be
applied. It is recommended that staff member be trained to
restore the setting as it was when they entered the room or the
new setting will be applied until it is once again changed or a
guest checks out.
 The thermostat temperature can be changed by the guest at any
time. The STANDARD differential will be applied to the new
thermostat setting. This setting and differential will remain in
effect until it is again changed by the guest or the guest checks
out.
 When the guest checks out the EMS will change the thermostat
to the UNRENTED setting and the DEEP SETBACK differential
(default 6 degrees) above or below the SETPOINT temperature.
 If a staff member changes the thermostat setting when a room is
UNRENTED the room the DEEP SETBACK will be applied. It is
recommended that staff member be directed to restore the
setting or the new setting will be applied until a guest checks in.
 Training rooms or other special purpose hotel rooms can be
automatically controlled by the EMS in the same way as guest
rooms, or can be manually controlled through the online EMS.
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EMS COMPONENTS
In-Room Components
The in-room components of the EMS include a motion sensor, a
door sensor, and a thermostat. The door and motion sensors are
battery powered using a CR-2 type lithium battery. The typical
battery life is 2 years for each sensor.
The EMS Thermostat
The Cassia EMS Thermostat is used to control the HVAC
equipment in guest rooms. Each thermostat uses 2 independent
Zigbee™ radios. One radio is used for the local Room Area Network
(RAN) within the room and the other radio is used to connect to the
Hotel Area Network (HAN).
The Cassia EMS Thermostat can operate standalone but is best
used when part of the Energy Management System. This product is
intended for remote control by the Energy Management System.
The Motion Sensor (PIR)
The motion sensor uses a Passive Infrared (PIR) sensor to detect
heat patterns in the room. Motion will be signaled to the thermostat
if the heat pattern changes. The thermostat combines PIR motion
sensor signals in a logic sequence with door switch signals to
determine whether a room is occupied or unoccupied. The PIR is
wireless and can be mounted in the best location. The motion
sensor uses a CR-2 lithium battery.
The EMS Door Sensor
The EMS Door Sensor consists of a base(containing the Zigbee
radio, magnetic sensor, and battery) and separate magnet. The
door sensor uses a CR-2 lithium battery.
Note: It is very important that the base and magnet line up correctly
and be within .5 in. (51 mm) when the door is closed.
On-Line EMS Control System
Infrastructure Components
Group Coordinator – Each Group Coordinator can support up to 100
Thermostats. The number of Group Coordinators is dependent on
the layout and construction of property.
Ethernet Network – The successful communication with Group
Coordinators heavily depends on connection to a robust ethernet
network.
© 2009 Schneider Electric. All Rights Reserved.
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The EMS Server – The EMS Server receives temperature, door
events, motion events, and other data from the rooms. The data
flows from the thermostats to the Group Coordinators then to the
Ethernet backbone to the EMS Server. The EMS Server also sends
commands back up to the thermostats.
Software Components
The EMS Listener – The EMS Listener communications software
runs on the EMS Server and writes data arriving from the rooms to
the EMS Server Database.
PMS Interface – The energy saving aspects of the EMS system are
very dependent on utilizing guest room check-in/check-out
information. When the guest rooms are unrented larger setbacks
are utilized to gain more energy savings. As soon as a guest checks
in, a command is sent from the EMS Server to the guest room so
that the HVAC unit begins conditioning the room before the guest
arrives.
Occupancy Logic
The EMS Thermostat receives signals from the door and motion
sensor in the room. These sensors are specifically addressed to the
thermostat in that room.
Whenever the door opens and closes the exit delay timer is started.
The thermostat is looking for any motion signals during this 15
minute default) timer. If any motion signals are received, then the
room is considered occupied. If no motion signals are received then
the room is considered unoccupied and goes into a setback mode.
If at any time during the Unoccupied mode the thermostat receives
any motion signals, then the thermostat will immediately consider
the room to be occupied.
Refer to these sections and the table below.


8
"Operating the System"
"Occupancy Parameters"
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User's Guide
Table 2: Occupancy Logic
Action
System activity
Guest checks in
The EMS changes the room temperature setting to the RENTED
OCCUPIED setting with a SETBACK differential.
Guest enters the
room
The EMS changes the thermostat temperature to the RENTED
OCCUPIED setting with a STANDARD or guest set differential.
Guest leaves the
room
If the room remains vacant for 15 minutes, the EMS changes the
thermostat temperature to the RENTED UNOCCUPIED setting and
the SETBACK differential is used.
Guest re-enters
the room
The EMS returns the thermostat temperature to the RENTED
OCCUPIED setting with a STANDARD or guest set differential.
In Unoccupied mode, the thermostat does not turn itself off. It allows
the room temperature to drift more around the guest’s SETPOINT
temperature. The goal is to allow room temperature to drift enough
to save energy but not enough to make the guest uncomfortable
upon their return. And when the room is unrented the room
temperature can be allowed to drift even further.
Network Infrastructure
The EMS Door and Motion sensors are associated with the EMS
Thermostat through the Room Area Network(RAN). The room
thermostats are associated with one Group Coordinator which is
connected to the EMS server through the hotel’s Ethernet network.
SYSTEM OVERVIEW
The core of the Cassia EMS system is the EMS Server. The EMS
Server receives room information through its connection to the
Group Coordinators. The EMS Server also sends information to the
room devices. In addition, check-in and check-out signals are
received from the hotel’s reservation system. Access to the EMS
server is made using the Cassia EMS client software which
connects to the EMS Server Database.
© 2009 Schneider Electric. All Rights Reserved.
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Occupancy Parameters
The EMS system uses the occupancy parameters below to
maximize energy savings during heating or cooling of guest rooms.
Table 3: Occupancy Parameters and Examples
Parameter
Definition
Room Unrented, Room Unoccupied
Before a guest is checked-in and the room is not occupied, the
thermostat SETPOINT temperature is set to the VACANT
Cooling/Heating setting to maximize energy savings. The EMS will
allow the room temperature to drift (up or down) by the DEEP
SETBACK differential above or below the SETPOINT temperature
before the HVAC system is activated.
Room Unrented, Room Occupied by
Housekeeping or Engineering, etc
If the room becomes occupied before a guest is checked-in such as
when housekeeping or engineering is working in the room, the
thermostat holds to the STANDARD DIFFERENTIAL around the
SETPOINT as long as the room is occupied. The EMS uses these
settings as long as the room remains occupied. When the room
vacated and remains unoccupied for 15 minutes, the thermostat
SETPOINT temperature” returns automatically to the Unrented
Default SETPOINT.
Room Rented, Room Occupied
When a guest is checked-in through the registration system the
thermostat SETPOINT temperature is set to the OCCUPIED
DEFAULT SETPOINT. The EMS will turn on the HVAC system to
bring the room to the selected temperature before the guest arrives at
the room. Once the SETPOINT temperature is achieved, the HVAC
system is turned off and the temperature is allowed to drift (up or
down) by the number of degrees determined by the DIFFERENTIAL
setting before the HVAC system is turned on.
Room Rented, Room Occupied, guest
manually sets thermostat temperature
If the thermostat setting is changed manually after a guest has
checked-in then the new temperature becomes the SETPOINT
temperature. The room temperature is allowed to drift by the number
of degrees in the occupied STANDARD DIFFERENTIAL setting.
When the SETPOINT temperature is determined manually, the
temperature will be kept automatically within the range of the
“SETPOINT Upper and Lower Limits” determined in the Room
Thermostat Settings. This setting remains in effect until the guest
checks out.
Room Rented, Room Unoccupied
When a guest leaves the room and it remains unoccupied after 15
minutes, the SETPOINT temperature drifts (up or down) by the
number of degrees determined in the UNOCCUPIED SETBACK
setting. Once the room achieves the new SETPOINT temperature the
HVAC system is turned off. Afterwards the temperature is allowed to
drift (up or down) by the number of degrees in the Standard
Differential setting before the HVAC system is again turned on.
When a guest is checked-out the room SETPOINT temperature is
automatically reset to the Unrented Default SETPOINT setting and
the temperature is allowed to change (up or down) by the Deep
Setback Variance.
The EMS will automatically ensure that the temperature in a room
will not go outside of the Upper or Lower Limit Range settings.
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Cassia™ Energy Management System (EMS)
User's Guide
Default Thermostat Settings
Use the table below to reference factory default thermostat settings
and to record the property requirements.
Table 4: Factory Default Thermostat Settings and Property Requirement Log
Room Conditions
System Pre Sets
Property Requirement Log
Guest checked-in /Room Occupied or
Guest not checked-in/Room Occupied Settings
RENTED DEFAULT TEMP
72
Standard Differential
+/- 2
Occupant Override Limits
Occupant Setting Upper Limit
80
Occupant Setting Lower Limit
60
Guest checked-in / Room not Occupied for at least 15 minutes
SETBACK
+/- 3
Guest not checked-in/Room not occupied Settings – Vacant(Deep Setback)
UNRENTED DEFAULT TEMP
74
DEEP SETBACK
+/- 6
Standard Thermostat Settings (reset upon guest check-in)
Status
ON
Mode
AUTO
Fan
AUTO
Upper Limit Safety Range
80
Lower Limit Safety Range
60
© 2009 Schneider Electric. All Rights Reserved.
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EMS CLIENT INSTALLATION, SET UP, AND OVERVIEW
The EMS Client is installed locally on a windows PC. To download
the latest version of the software go to www.schneider-electric.us.
The EMS Client software requires Microsoft® .NET 3.5. The installer
may have to load this first if it is not currently installed on the PC.
Once the software installation is complete, double click on the EMS
shortcut appearing on the Desktop.
The login screen will appear.
Figure 2: EMS Manager Login Screen
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Specifying Datasource Information
Before login, the datasource information must be specified. When
successfully completed, the datasource information is saved for that
specific property. Only connection information changes will require
that the datasource information to be verified. Datasource
information can also be set for multiple properties.
The following screen appears after the datasource has been
specified.
Figure 3: Datasource Connection Screen
The following Datasource information can be obtained from the IT
source at the property.




Server Name
SQL Server Initial Catalog:
User ID (This will not be the same as your login username to the
EMS Client)
Password (This will not be the same as your login password to
the EMS Client)
© 2009 Schneider Electric. All Rights Reserved.
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After entering the information press the Test button to verify the
connection. If the connection fails double check the spelling and
capitalization of the fields entered.
Click OK to go back to the EMS login screen.
Enter the EMS username and password. If the username or
password is not valid an Invalid Login message will appear.
Floor Layout Screen
If the login is successful the floor layout for the property will appear.
Figure 4: Floor Layout Screen
The Floor Layout provides a layout view for each floor and the color
coded status for each room on the floor. Refer to the table below for
status definitions for each color.
Table 5: Room Color Status Definitions
Color
Status Definition
BLUE
Room Occupied and Rented
BLACK
Room Unoccupied and Rented
GREEN
Room Unoccupied and Unrented
RED
Room Occupied and Rented
To view room details on a floor click on the floor while it is the center
card.
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Rooms Screen
The rooms screen shows all rooms on the selected floor arranged in
the cover flow cards. Each card shows key information:





Approximate Current Room Temperature
SETPOINT Temperature
Mode(AUTO/OFF)
Current Fan Activity(Fan Symbol means fan is running)
Current Compressor Activity(Snowflake means calling for cool,
Flame means calling for heat)
 Current Occupied/Rented Status(Color codes at top of card and
text at bottom)
To see all room details click on the room card while it is the center
location.
Details of the room will be populated at the bottom of the screen.
Figure 5: Rooms Screen
KEY:
1. (LEFT) List of
devices in the room
2. (CENTER) Event
and device setting
information
3. (RIGHT) Graphical
information (Pie Chart
and TemperatureOver-Time Graph)
© 2009 Schneider Electric. All Rights Reserved.
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Rooms Screen – Pie Chart
Clicking on the Heating and Cooling Pie chart at bottom right of the
Rooms Detail Screen will expand the chart to fill the screen. This
graph shows the percentage of Heating, Cooling, or Idle time for the
selected thermostat for the time period selected.
Figure 6: Heating and Cooling Pie Chart Screen
Temperature-Over-Time Graph and Data Viewing
The Temperature-Over-Time chart shows following for the time
period selected at the top of the screen.
Figure 7: Room Temperature-Over-Time Screen
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Table 6: Key to Temperature-Over-Time Figure (Above)
Object
Represents
Graph lines
Room Temperature – represents the room temperature
over the time period
- Black Line
Idle mode
- Blue Line
Cooling mode
- Red Line
Heating mode
Triangles
Door Open/Close Events
- Yellow
Door Close Event
- Green
Door Open Event
Squares (Red)
SETPOINT Changes
Colored bands
Mode: Occupied/Unoccupied/Deep Setback
- White
Occupied
- Grey
Unoccupied/Rented
- Green
Unoccupied Unrented(Deep Setback)
Circles (Green)
Outside Temperature – If outside temperature is
selected. A new scale appears at the right.
Check boxes at the top of the screen allow different data to be made
visible/invisible.
Figure 8: Room Temperature-Over-Time Screen – Data Pop-up
An additional data pop-up appears when hovering the mouse
pointer over a data point or band.
© 2009 Schneider Electric. All Rights Reserved.
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The following data appears in the pop-up.











Occupied/Vacant mode for that band
Time period for the band
Occupied total runtime for the graph time period up until the
selected band
Vacant total runtime for the graph time period up until the
selected band
Occupied runtime percentage up until the selected band
Vacant runtime percentage up until the selected band
Total time room has been occupied for the graph period up until
the selected band
Total time room has been vacant for the graph period up until
the selected band
Predicted total runtime
Actual total runtime
Predicted saving percentage for the graph period up until the
selected band
Figure 9: Room Temperature-Over-Time Screen – All Data
Shown
The EMS Manager software has a data zoom viewing feature. Left
click and drag over the data to be enlarged. It will take a few
seconds to load the zoomed view.
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Reports Dashboard
The dashboard presents several graphical reports for the entire
property.
The following graphs are available:








Highest Battery Levels
Lowest Battery Levels
Highest Room Temperatures
Lowest Room Temperatures
Individual Room Heating and Cooling Pie chart
Individual Room Temperature Over Time chart
Highest SETPOINTs
Lowest SETPOINTs
Figure 10: Reports Dashboard
© 2009 Schneider Electric. All Rights Reserved.
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Scheduler
The scheduler allows commands to be sent to one or more
Thermostats at one scheduled time or at recurring times.
To add a new scheduled event, double-click on the day for the event
to occur.
Figure 11: Scheduler Screen
Rooms for which the event will occur can be selected individually or
as a group.
Figure 12: Scheduler Screen – Room Selection
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OPERATION AND MAINTENANCE
Figure 13: Thermostat Features and Default Button Programming
Table 7: Thermostat Operation Reference
Figure
Button(s)
Reference*
Function
(A)
Thermostat SETPOINT Temperature
(B)
MANUAL MODE
(Temperature Adjustment)
+ (UP)
Raises the SETPOINT temperature
- (DOWN
Lower the SETPOINT temperature
THERMOSTAT OPERATION MODE
Toggles thermostat mode between AUTO mode and
OFF
- AUTO
Thermostat controls the HVAC Unit automatically
switching between Heating and Cooling
- OFF
Thermostat does not control the HVAC Unit
(C)
C or F MODE
(Celsius or Fahrenheit)
(D)
FAN MODE
Toggle between Celsius and Fahrenheit Temperature
Display
Optional
- ON
The fan runs constantly
- AUTO
The thermostat will run the fan only when heating or
cooling
Notes: * Refer to the figure "Thermostat Features and Default Button Programming"
1. The thermostat normally displays the current room (ambient) temperature.
2. Pressing the + (Up) or – (Down) buttons once will cause the SETPOINT temperature to be
displayed along with the current ambient temperature. The backlight will also turn on. Pressing
the Up or DOWN button again will change the SETPOINT temperature. While the SETPOINT
temperature is displayed, pressing the Up or Down buttons will raise or lower the SETPOINT
temperature.
© 2009 Schneider Electric. All Rights Reserved.
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Thermostat Settings
All thermostats are shipped with factory default settings. Factory
settings are used to establish a baseline for thermostat operations.
These settings will be overridden by the EMS during automatic
energy management processes. Replacement thermostats should
be set to a SETPOINT temperature of 71 degrees F.
Table 8: Thermostat Default Settings
Description
Setting
Low SETPOINT Limit
60
High SETPOINT Limit
80
Setback Variance
3
Deep Setback Variance
6
TROUBLESHOOTING
Thermostat Problems
The following trouble shooting techniques assume that the wiring
connections between the HVAC and the Thermostat are correct and
that the Thermostat has been controlling the HVAC properly in the
past. If this is not the case, correct any wiring problems before
presuming that the Thermostat is not working properly.
IMPROPER SYSTEM OPERATION
Do not move thermostats. Each thermostat is uniquely addressed to
it's room location.
Failure to follow this instruction could result in false system
data input.
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Table 9: Thermostat Troubleshooting Problems and Possible Solutions
Problem
Possible Solution
Thermostat Display is
Blank
The display on the Thermostat is blank. Pressing buttons on the Thermostat does
not cause the backlight to turn on or anything to display on the screen.
Remove the thermostat and either measure DC voltage between the R and C
terminals(should read 24V) or replace with temporary Thermostat. If the new
Thermostat powers up properly then the old one is defective and must be replaced.
If the new Thermostat does not power up then either the HVAC unit is not supplying
power or there is a wiring issue.
Thermostat Doesn't
Control Anything
The Thermostat seems to provide no control of HVAC and temperature. Does the
Thermostat screen respond to button presses? If not then check power to the
Thermostat. Check to see if the Thermostat Mode is set to AUTO/COOL/HEAT and
not OFF. If the display screen is showing a Snowflake or Flame symbol and the
Fan symbol then it is calling for COOL/HEAT/FAN and the relays are closed. Check
the wiring to the HVAC unit. You may wish to actually remove the compressor and
fan wires and tie them directly to the 24V to see if they function.
Thermostat Does Not
Heat/Cool When You
Move the SETPOINT
Several Degrees
If the thermostat is in AUTO mode it may be switching between Heat and Cool
mode. By default the SETPOINT temperature will need to be 6 degrees. This
feature is there to prevent the thermostat from constantly changing between Heat
and Cool modes when the temperature is fluctuating up and down.
The thermostat has a field calibration setting. The default value is zero. Ex: If the
Thermostat is
stat is reading 3 degrees too low, then change the calibration setting to 3. If the stat
Consistently Reading
Temperature Too Low or is reading 4 degrees to high, then change the calibration setting to -4.
Too High
© 2009 Schneider Electric. All Rights Reserved.
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Cassia™ Energy Management System (EMS)
User's Guide
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Replacing Thermostats
When replacing thermostats, follow the safety precautions and
instructions below and use the wiring diagram.
ELECTROSTATIC DISCHARGE (ESD) SENSITIVE EQUIPMENT
Ground yourself and discharge any static charge before handling
this device.
Failure to follow these instructions can result in equipment
damage.
Safety Precautions
This section contains important safety precautions that must be
followed before attempting to install or maintain electrical
equipment. Carefully read and follow the safety precautions below.
Before replacing the thermostat, check to see that the R and C
wires are properly connected according to the figure "Wiring the
Thermostat". If the wires are properly connected and the thermostat
is not operating properly follow the steps below to replace
thermostats.
1. Remove the thermostat from the back plate attached to the wall.
The front portion of the thermostat assembly houses the circuit
board containing the Zigbee radios.
2. Note the position of Zigbee radios located on the circuit board.
Gently remove the Zigbee radios from the circuit board and
retain them.
3. Remove the back plate from the replacement thermostat. Insert
the radios into the replacement thermostat. Place the radios in
their original positions and orientation. Visually inspect all the
pins to be sure they are making good contact.
4. Insert the replacement thermostat into the back plate. Be sure
the contact pins on the thermostat circuit board insert into the
wiring terminal block of the back plate.
The replacement thermostat will appear in the EMS Manager
software as the original thermostat. Test the communications by
opening and closing the room door several times. Stand in front of
the motion sensor for several minutes and provide sufficient periodic
motion to activate the sensor.
Check the EMS Manager software for the recorded events.
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© 2009 Schneider Electric. All Rights Reserved.
63249-420-338A1
03/2010
Cassia™ Energy Management System (EMS)
User's Guide
Wiring the Thermostat
Refer to the diagram below to make typical wiring connections for
the thermostat. Use 18-22 AWG copper wire.
Figure 14: Thermostat Wiring Diagram
KEY:
R = 24VAC
C = Common
Y1 = Cool/First stage
G, G3 = Fan/High speed fan
W2, G2 = Second stage heat/Medium speed
fan
W1, B/0 = Heat/Changeover/Reversing valve
Y2, G1 = Second stage cool/Low speed fan
Forming a Room Network and Joining a Thermostat to a Group Coordinator
If you are replacing an existing thermostat without using the Zigbee
radios from the previous thermostat, you must default the door and
motion sensors first using the procedures below.
Enter the thermostat configuration mode by holding all 3 bottom
buttons simultaneously and tapping the UP button.
The screen below will appear.
1. Stat Config
2. Network Config
3. Diag/Test
Select "2. Network Config"
The screen below will appear.
1. Enter Room Number
2. Active Scan
3. Status
4. Permit Joining
5. No Joining
6. Leave Network
The center button is used to toggle between the Hotel Area Network
(HAN) and the Room Area Network (RAN).
Note: This must only be done after a RAN is setup for the
thermostat with the proper room number.
Make sure HAN is visible and select "2. Active Scan".
© 2009 Schneider Electric. All Rights Reserved.
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Cassia™ Energy Management System (EMS)
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A “Please Wait” screen will appear while the thermostat is searching
for available HANs. When completed, a list of available networks
will appear on the screen. A Cassia HAN network will always end in
an “EZ”. Choose the appropriate network and press Select.
If the thermostat joins the HAN correctly a status screen will appear
and the status should be 2. If anything other than 2 appears, then
the thermostat did not join the HAN properly. Repeat the Active
Scan Process again.
Restoring Sensors to Factory Default State – Follow the steps below
to reset the thermostat to the factory default state.
1. Open the thermostat by pressing the access release tabs on the
sides of the sensor.
2. Remove and retain the battery (if installed).
3. Locate the Programming Button found on the center of the
circuit board. While pressing and holding the Programming
Button, install the battery. The LED will blink.
4. After the LED stops blinking, release the button. The Thermostat
is now restored to the factory default state.
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© 2009 Schneider Electric. All Rights Reserved.
63249-420-338A1
03/2010
Cassia™ Energy Management System (EMS)
User's Guide
Support and Service
Contact the Customer Information Center for technical support by
phone at 1-888-778-2733 or e-mail at
[email protected].
Contact your local Schneider Electric service representative for
repairs or service to your network.
You may also find helpful information on our web site at
www.Schneider-Electric.us.
© 2009 Schneider Electric. All Rights Reserved.
27
Cassia™ Energy Management System (EMS)
Instruction Bulletin
Schneider Electric, USA
320 Tech Park Drive, Suite 100
La Vergne, TN, 37086
1-888-778-2733
www.schneider-electric.us
Cassia is a trademark or registered trademark of Schneider Electric
and/or its affiliates in the United States and/or other countries.
Electrical equipment should be installed, operated, serviced, and
maintained only by qualified personnel. No responsibility is assumed by
Schneider Electric for any consequences arising out of the use of this
material.
© 2009 Schneider Electric. All Rights Reserved.
63249-420-338A1
03/2010