Aprilaire 8826 Quick guide

Model 8826 System Controller
Model 8826 System Controller
Installation, Configuration and User Manual
READ AND SAVE THESE INSTRUCTIONS

WELCOME
TECHNICAL SUPPORT
SYSTEM CONTROLLER PACKAGE CONTENTS
Technical Support .......................................2
System Controller Package Contents ......................2
System Pre-requisites....................................3
Other Useful Documents..................................3
Installation Steps........................................3
Step 1: Mount the System Controller ........................3
Step 2: Provide Power to the System Controller................3
Step 3: Connect the System Controller to the Distribution Panel .....4
Step 4: Connect the System Controller to a Network or Computer....4
Configuring the System Controller for your
Network or Computer ....................................4
On Windows Computers ..................................4
Changing your IP Address ................................5
For Windows XP.........................................5
For Windows 7 ..........................................6
Change your IP Address on your System Controller
to Match your Network Settings ..........................7
To Restore your Computer’s IP Address ....................8
For Windows XP.........................................8
For Windows 7 ..........................................9
System Set-up..........................................10
Temperature Format .....................................10
Service Override ........................................10
Time and Date .........................................10
Number of Thermostats on the Network ....................10
Naming the System Controller ............................10
System Status Bar ......................................10
Adding HVAC and Humidity Control Equipment ............11
Configuring Thermostats and Humidistats.................11
Naming the Thermostats/Humidistats ......................12
Assigning Heating and Cooling Equipment (Thermostat Only)....12
Lockouts ..............................................12
Service Reminders (Model 8800 Thermostats Only)............12
Sensors ...............................................13
Security ...............................................14
Humidistat Set-up ......................................15
Thermostat Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Scheduling.............................................16
Master Schedules ......................................16
Holidays ..............................................17
Holds.................................................18
Individual Holds ........................................18
Status .................................................19
Setting Alarms .........................................20
Alarms................................................21
E-mail Alerts...........................................21
Service Reminders ......................................22
Firmware Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
LED Diagnostics ........................................25
Limited Warranty .......................................26
Warranty Registration ...................................26
System Requirements ...................................27
TABLE OF CONTENTS
Thank you for choosing the Aprilaire®HVAC Automation System. With this system you have taken the first step towards total control of a
building’s heating and air-conditioning system. This simple to use, yet powerful system, provides centralized control of all of the buildings
thermostats with an intuitive graphics based software package. The software can be accessed via any computer allowing the means to manage
comfort and control the energy costs that the heating and cooling equipment represent.
If you have any questions or concerns regarding the installation or operation of this system, DO NOT take the product back to your distributor.
Please contact Aprilaire at 888-782-8638 for system integrator support.
You may need to work with an IT professional to properly configure your e-mail settings and/or configure your network to provide access to the
System Controller from outside your local network.
1. The Model 8826 System Controller
2. Power Supply
3. Installation, Configuration and User Manual
4. Eight Position Connector for wiring the System Controller to the Distribution Panel
2

These instructions assume that you have already installed the thermostat(s) and wired them to the Distribution Panel according to the Model
8800 System Installation Instructions (Document 10009416).
If your thermostats are configured as non-programmable, all schedules are stored in the System Controller and setpoints are written out to
the thermostats at the beginning of each schedule event. If the thermostats are configured as programmable, the schedules are stored in the
thermostats. This is advantageous because if communication to the System Controller is disrupted, the thermostats will continue to run the
programmed schedule.
In programmable mode, Progressive Recovery can be enabled at the thermostat. The Progressive Recovery feature allows the thermostat to
activate the heating and cooling equipment PRIOR to a scheduled event in order to reach the desired temperature at the start of that scheduled
event. Example: If the WAKE time is 6 am, and the temperature is 70°, the heat will come on before 6 am, so the temperature is 70° by the
time you wake at 6 am.
IMPORTANT NOTE: Set the thermostat ID numbers to consecutive numbers beginning at 1.
SYSTEM PRE-REQUISITES
OTHER USEFUL DOCUMENTS
The following documents will be useful in installation and
setup of a system using Model 8870 thermostats:
Model 8870 Installation Instructions (Document 61000494)
Model 8870 Operating Instructions (Document 61000491)
Model 8061 TT Support Module Installation Instructions
Model 8062 TrH Support Module Installation Instructions
Model 8870 System Installation Instructions (Document 10008222)
Model 8870 Programmer’s Manual (Document 10005756)
The following documents will be useful in installation and
setup of a system using Model 8800 thermostats:
Model 8800 Installation Instructions (Document 61000761)
Model 8800 Operating Instructions (Document 61000762)
Model 8081/8082 Support Module Installation Instructions
(Document 61000793)
Model 8800 System Installation Instructions (Document 10009416)
Model 8800 Programmer’s Manual (Document 10009414)
INSTALLATION STEPS
STEP 1: MOUNT THE SYSTEM CONTROLLER
To install the System Controller you will need to complete the following steps, which are described in the following sections:
1. Mount the System Controller in a suitable location.
2. Connect the System Controller to a network or computer.
3. Connect the System Controller to a Distribution Panel.
4. Connect power to the System Controller using the included power supply.
The System Controller should be mounted to a wall at a location that:
•Providesaccesstoapoweroutlet.
•ProvidesaccesstoanEthernetnetworkconnectionifyouplantoaccesstheSystem
Controller over a network.
•ProvidesaccesstowiretheRS-485communicationstothedistributionpanel.
The System Controller should be mounted in a dry location that maintains normal temperatures
between 40°F and 100°F.
The System Controller does not need to be accessed in normal operation, but should be
accessible for servicing.
STEP 2: PROVIDE POWER TO THE SYSTEM CONTROLLER
The System Controller comes with a power adapter that plugs into a normal 120VAC outlet.
Simply plug the power adapter into an electrical outlet and connect the power plug to
the 5 position connector on the 8826. It is highly recommended to use a surge protected
uninterruptible Power Supply to power the 8826.
Illumination of the Power LED on the System Controller indicates power has been established.
51
PWR
ETHERNET
“POWER” INDICATOR
“LINK” LED
“SPEED” LED
3

STEP 3: CONNECT THE SYSTEM CONTROLLER TO THE DISTRIBUTION PANEL
STEP 4: CONNECT THE SYSTEM CONTROLLER TO A NETWORK OR COMPUTER
The System Controller connects to the distribution
panel on the Thermostat port. The wiring is done
as follows:
Thermostat Port Distribution Panel
Pin 4 B+
Pin 5 B-
Pin 6 A+
Pin 7 A-
There are two methods to connect a computer to the System Controller; directly to a computer (with a crossover Ethernet cable) or using a local
area network (with a standard Ethernet cable).
If there is no network available, then the System Controller is connected to a computer using a crossover cable. Plug one end of the crossover
cable into the System Controller and the other end into the computer’s network port.
If there is a network available, then use a standard Ethernet cable, plugging one end into the System Controller and the other into an available
Ethernet network jack.
CONFIGURING THE SYSTEM CONTROLLER FOR YOUR NETWORK OR COMPUTER
Once you have completed the installation of the System Controller you are ready to configure the System Controller for use on your network or
with your computer.
The System Controller is sent from the factory with a default fixed IP address of 192.168.0.100. If your computer has an IP address that begins
with 192.168.0 then proceed to the System Set-up section. If you don’t know the IP address of your computer, then proceed as follows:
ON WINDOWS COMPUTERS:
1a. For Windows XP, click on Start, Run to bring up the run dialog
similar to that shown at the right.
1b. For Windows Vista and 7, click on Start and then in the Search
Programs and Files type “run” to bring up the run dialog similar to
that shown on the right.
POWER
LAN
THERMOSTATS
A- A+ B- B+
SYSTEM CONTROLLER
Model 8826
POWER
SUPPLY
APRILAIRE
DISTRIBUTION PANEL
A- A+ B- B+
LAN – TO LOCAL AREA NETWORK OR COMPUTER
4

2. Type cmd and then click OK: this will
bring up the command prompt similar to
that shown at right:
3. Type ipconfig and press Enter: several lines including the IP Address of the Local Area Connection will be displayed, as shown above.
FOR WINDOWS XP
1a. Start the Control Panel by clicking Start, then Settings and Control Panel. In the Control Panel, locate and double click Network Connections
to bring up Network Connections dialog, shown below. Select Local Area connection and then go to File and select Properties to bring up the
Local Area Connection Properties dialog box on the right, below.
CHANGING YOUR IP ADDRESS
If your computer’s IP address begins with 192.168.0 then you can skip this step.
If you computer’s IP address does not begin with 192.168.0 then you need to temporarily change your computer to connect to the System
Controller and change its settings to match your network.
In the following procedure we will change your computer’s IP address so that you can communicate with the System Controller. Once this step is
completed, you can then connect to the System Controller to change it’s IP address to match your network.
5

FOR WINDOWS 7
1b. Start the Control Panel by clicking Start, then Control Panel. In the Control Panel, locate and double click Network and Sharing Center to bring
up Network and Sharing dialog, shown below. Double click on Local Area connection and then select Properties to bring up the Local Area
Connection dialog box on the right, below.
2. For Windows 7, select Internet Protocol Version 4 (TCP/IPv4) or for
Windows XP, select Internet Protocol (TCP/IP). Then click Properties
to bring up the TCP/IP dialogs.
3. If the Use the following IP address field is selected, make
a note of the current IP address and Subnet mask for future
reference:
Current IP address: ____.____.____.____
Current Subnet mask: ____.____.____.____
4. If Obtain an IP address automatically is selected instead, then
click Use the following IP address.
5. Set the IP address to a unique IP address, such as 192.168.0.99,
and set the Subnet mask to 255.255.255.0 as shown in the image
at the right and click OK. On some computers you may have to
restart the computer for your changes to take affect.
6

CHANGE YOUR IP ADDRESS ON YOUR SYSTEM CONTROLLER TO MATCH YOUR
NETWORK SETTINGS
The following section describes how
to change the IP address of the system
controller. Perform these steps:
•Ifyouhavefollowedthepreviousstepsto
change your computer’s IP address so that
it starts with 192.168.0, and you are now
ready to set the correct IP address for the
System Controller, or
•Ifyourcomputer’sIPaddressdoesstart
with 192.168.0, but you want the IP
address of the System Controller to be
something other than 192.168.0.100.
1. Start a web browser on your computer.
2. Place the cursor in the address field and
type http://192.168.0.100 and then press
Enter to bring up the page shown at right.
3. Select the Network tab at the top of the
page. You will see the page at right:
4. Type in the desired IP address and Subnet
mask to match your network.
5. Record the IP address that you entered
below for future reference.
____.____.____.____
7

TO RESTORE YOUR COMPUTER’S IP ADDRESS
If you changed your computer’s IP address to connect to the System Controller, follow these steps to restore your computer’s IP address back to
its original setting.
FOR WINDOWS XP
1a. Start the Control Panel by clicking Start, then Settings and Control Panel. In the Control Panel, locate and double click Network Connections
to bring up Network Connections dialog, shown below. Select Local Area connection and then go to File and select Properties to bring up the
Local Area Connection dialog box on the right, below.
8

FOR WINDOWS 7
1b. Start the Control Panel by clicking Start, then Control Panel. In the Control Panel, locate and double click Network and Sharing Center to bring
up Network and Sharing dialog, shown below. Double click on Local Area connection and then select Properties to bring up the Local Area
Connection dialog box on the right, below.
2. For Windows 7, select Internet Protocol Version 4 (TCP/IPv4) or for
Windows XP, select Internet Protocol (TCP/IP). Then click Properties
to bring up the TCP/IP dialogs.
3. If you wrote down an IP address during step 3 of Changing Your IP
Address, Change the IP address and subnet mask to the previous
values that you recorded. Otherwise, select Obtain an IP address
automatically.
4. Click OK. On some computers you may have to restart the computer
for your changes to take effect.
9

SYSTEM SET-UP
NAMING THE SYSTEM CONTROLLER
SYSTEM STATUS BAR
TIME AND DATE
The description of System Controller is displayed on the top of every
page. The description can be changed using the Unit Description field.
The unit description can be up to 26 characters and any combination
of letters, numbers, spaces, and symbols. This name will also be used
to identify the System Controller when e-mail alerts are sent.
The System Status Bar will be present for all pages on the System
Controller. The System Status Bar will display the date and time. The
System Status Bar will display “Alarms Exist” if there are any active
alarms. The System Status bar will display the Outdoor temperature if
there is an outdoor temperature sensor connected and enabled on the
thermostat at Node Address 1.
The System Controller can be set to display the time in either a
12 hour or 24 hour format using the Time Format Selection.
The time is set by using the Set Time button. When the Set Time
button is pressed the System Controller will update the time and
date to match the web browser. The Time and Date of the System
Controller will be written out to all the thermostats on the network.
NUMBER OF THERMOSTATS ON THE NETWORK
SERVICE OVERRIDE
TEMPERATURE FORMAT
The number of thermostats on the network can be set either by
manually setting the Number of Thermostats and Humidistats field or
by using the Find button. When the Find button is pressed, the System
Controller will automatically discover the number of thermostats on
the network and populate the Number of Thermostats and Humidistats
field. If the Find button is used to populate this field, confirm that the
number of thermostats and humidistats on the network is correct. If
the number is not populated correctly, the network settings at the
thermostats should be verified.
The Service Override feature can be used to activate the network
override feature in the Model 8870 thermostats and Model 8800
thermostats that are set to non-programmable mode. When the
network override feature is enabled the thermostat will ignore
commands from the System Controller that modify the Mode, Fan or
Setpoint settings. This feature can be used if maintenance is being
performed on the network.
The Temperature Format field can be used to select between
Fahrenheit and Celsius display. This setting will affect the
temperature display on both the System Controller and the
thermostats on the network.
SYSTEM STATUS BAR
10

ADDING HVAC AND HUMIDITY CONTROL EQUIPMENT
The HVAC page allows the user to set-up,
up to 24 HVAC units. These units can be
renamed for ease of identification. The
Name field can be up to 12 characters and
any combination of letters, numbers, spaces,
and symbols.
The Controls Heat/Humid field is used to
select if the equipment controls Heating, in
the case of a thermostat or Humidification in
the case of a humidistat.
The Controls Cool/Dhmd field is used to
select if the equipment controls Cooling, in
the case of a thermostat or Dehumidification
in the case of a humidistat.
The Fan field is used to select if the
thermostat controls the fan.
CONFIGURING THERMOSTATS AND HUMIDISTATS
The Thermostat/Humidistats page is used to
configure the thermostats and humidistats
on the network. The Address Field is used
to identify which thermostat or humidistat
on the network is being displayed for set-up.
The Model field will indicate what model
thermostat is connected at that network
address. The Prior and Next buttons can
be used to navigate to the previous or next
network address.
11

NAMING THE THERMOSTATS/HUMIDISTATS
The Name field is used to identify the thermostat or humidistat on the rest of the System Controller pages. The Name field can be up to 20
characters and any combination of letters, numbers and spaces. The Name field does not allow symbols. If the thermostat being configured is a
Model 8800, the thermostat name will be displayed in the message center on the thermostat.
ASSIGNING HEATING AND COOLING EQUIPMENT (THERMOSTAT ONLY)
The Heating Unit field is used to assign a heating unit to the thermostat. Only HVAC units where the Controls Heat/Humid field was set to Yes
will be displayed as options for this field. If no heating unit is assigned the thermostat mode cannot later be set to Heat, Emergency Heat, or
Auto.
The Cooling Unit field is used to assign a cooling unit to the thermostat. Only HVAC units where the Controls Cool/Dhmd field was set to Yes will
be displayed as options for this field. If no cooling unit is assigned the thermostat mode cannot later be set to Cool or Auto.
LOCKOUTS
SERVICE REMINDERS (MODEL 8800 THERMOSTATS ONLY)
The Mode Lock field can be set to Full or Off. If the Mode Lock Field is set to Full, changes to the Mode setting will not be allowed to be made
at the thermostat. If the Mode Lock field is set to Off, changes to the Mode setting will be allowed to be made at the thermostat.
The Fan Lock field (thermostat only), can be set to Full, Timed, or Off. If the Fan Lock field is set to Full, changes to the fan setting will not be
allowed to be made at the thermostat. If the Fan Lock field is set to Timed, changes to the Fan setting are allowed at the thermostat, but will
revert back to the previous setting after the time set by the Minutes field. If the Fan Lock field is set to Off, changes to the Fan setting will be
allowed to be made at the thermostat.
The Setpoint Lock field can be set to Full, Timed, Timed Range, Range, or Off. If the Setpoint Lock field is set to Full, no changes to the setpoint
are allowed at the thermostat. If the Setpoint Lock field is set to Timed Range, or Range, changes to the setpoint at the thermostat are limited by
the Setpoint Limit field. If the Setpoint Lock field is set to Timed or Timed Range, changes to the setpoints are allowed at the thermostat, but will
revert back to the previous setting after the time set by the Minutes field. If the Setpoint Lock field is set to Off, changes to the setpoints will be
allowed at the thermostat.
For Thermostats the Filter Change Reminder and Service HVAC Reminder can be used to set the service reminders for the Model 8800 thermostat.
For Humidistats the Water Panel Change Reminder and Service Dehumidifier Reminder can be used to set the service reminders for the Model
8800 thermostat.
12

SENSORS
The System Controller can be used to
monitor the status of up to 4 humidity
or temperature sensors per thermostat.
Sensors are implemented on the Model 8800
thermostat by installing the Aprilaire Model
8081 TT or Model 8082 TrH Support Module.
Sensors are implemented on the Model 8870
thermostat by installing the Aprilaire Model
8061 TT or Model 8062 TrH Support Module.
The first sensor is for Support Module
address 1, sensor 1. The second sensor
is for Support Module address 1, sensor
2. The third sensor is for Support Module
address 2, sensor 1, and the fourth sensor
is for Support Module address 2, sensor 2.
If a sensor is installed at these locations the
sensor type will be displayed. If no sensor is
installed, a no sensor message will be
displayed. If a sensor is attached to the
thermostat, but does not appear on this
page the support module dip switch settings
should be verified.
Each sensor can be named so it can be more
easily identified on other System Controller
pages. The Sensor Name field can be up
to 12 characters and any combination of
letters, numbers, spaces, and symbols.
13

SECURITY
The 8826 comes by default with security
disabled. When no security is enabled
anyone who accesses the 8826 controller
can edit any field.
Note: Once an Administrator log-in is
created, the Administrator must log in to
create the User name and password.
Security can be enabled by setting up a user
name and password for both a User and an
Administrator. The User and Administrator
log-ins can be created on the Admin page.
Once a user is logged in they can also use
this page to logout using the Logout button.
Once security is enabled, all pages can be
viewed, but the user cannot modify anything
until they log in using the About page.
14

HUMIDISTAT SET-UP
Humidistats are controlled using the
Humidistats page. The Prior and Next
buttons are used to navigate through all the
humidistats on the network.
The Humidity field displays the controlling
humidity value for the humidistat.
Equipment Mode can be used to select
between Off, Humidify, Dehumidify or
Auto. In Auto mode the humidistat
will control humidity through both
humidification and dehumidification.
The Equipment Status will indicate if
the equipment is off, humidifying or
dehumidifying.
The Humidifier Set Point field is used to set
the humidifier control set point.
The Dehumidifier Set Point field is used to
set the dehumidifier control set point.
THERMOSTAT SET-UP
Thermostats are controlled using the
Thermostats page. The Prior and Next
buttons are used to navigate through all the
thermostats on the network.
The Temperature field displays the controlling
temperature value for the thermostat.
The HVAC Mode field is used to control the
HVAC mode of operation. The options are
Off, Cool, Heat, Auto, and Em Ht. In
Auto mode the thermostat will control
both heating and cooling. In Em Ht
the thermostat will control heating
with Auxiliary Heat only. Note: options may
be limited based on equipment type. The
HVAC status will indicate if the equipment is
heating, cooling or off.
The Fan Mode field is used to control the
Fan mode of operation. The options are
Auto, On and Circ. Note that Circ operates
similarly to Auto, but guarantees 20 minutes
of fan run time every hour. The Fan Status
field indicates whether the fan is on or off.
15

SCHEDULING
The Schedules page is used to control
thermostat schedules. The thermostat
description is displayed on the top of the
page. The Prior and Next Buttons are used
to navigate between thermostats on the
network. The Events per Day field is used
to select between 2 and 4 events per day.
When configured for 4 events per day the
events are Wake, Leave, Return, and Sleep.
When configured for 2 events per
day the events are Occupied and
Unoccupied. Each event has a Start
Time, Heat Setpoint, Cool Setpoint and Fan
Mode. The Cool Setpoint can be no lower
than the Heat Setpoint plus the deadband.
Each day is configured by selecting the
corresponding day button. All days that have
identical settings are highlighted in yellow.
The Hldy button is used to set a schedule
for holidays. The Copy to Weekday, Copy to
Previous Day and Copy to All buttons can be
used to eliminate steps required to configure
the schedule. The Active Schedule can be
changed from the individual thermostat
schedule to a master schedule using the
Active Schedule field.
MASTER SCHEDULES
The System Controller has four Master
Schedules. The Prior and Next buttons are
used to move between the four Master
Schedules. The Master Schedules can be
named using the Master Schedule field
at the top of the page. The Events per
Day field is used to select between 2 and
4 events per day. When configured for 4
events per day the events are Wake, Leave,
Return, and Sleep. When configured for 2
events per day the events are Occupied and
Unoccupied. Each event has a Start
Time, Heat Setpoint, Cool Setpoint
and Fan Mode. The Cool Setpoint can
be no lower than the Heat Setpoint
plus the deadband. Each day is configured
by selecting the corresponding day button.
All days that have identical settings are
highlighted in yellow. The Hldy button is
used to set a schedule for holidays. The
Copy to Weekday, Copy to Previous Day and
Copy to All buttons can be used to eliminate
steps required to configure the schedule.
16

HOLIDAYS
The Holiday page is used to designate a
date as a holiday. When a date is set as a
holiday all thermostats will run the holiday
schedule instead of the schedule for that
day of the week. The Restore US Holidays
button can be used to restore the default
US Holidays. US Holidays and the ten user
holidays can be edited using the Edit Holiday
or Daylight Savings button.
If e-mail is set-up, the System Controller
will send a reminder on January 1st to
update the holidays for the new year. If
holidays are not updated, the holidays
from the previous year will be used.
In the Edit Holiday or Daylight Savings
Screen the name of holiday being edited
appears in the Name field, and this field
can be modified to change the name of the
holiday. The holiday to be edited can be
selected using the holiday selection field.
The date field is used to assign a date
to the holiday. When a date is assigned,
the holiday is added as an active holiday.
Holidays can be deleted using the
Delete button.
The Daylight Savings Time Start and
Daylight Savings Time End fields are used
to set the beginning and end of daylight
savings. The Delete button is used to disable
daylight savings. The Restore button is used
to re-enable daylight savings and restore the
default daylight savings start and end dates.
The Done button is used to return to the
main Holiday page.
17

HOLDS
The Vacation page can be used to suspend
the schedule at all thermostats with a single
action. The Heating and Cooling fields are
used to set the temperature set points. The
Fan Mode field is used to set the fan mode
during vacation hold. The End Date and
End Time fields set the time at which the
vacation hold will end and the thermostats
will resume their schedules. An active
vacation hold can be ended prior to the end
date and time with the Resume Schedule
button.
INDIVIDUAL HOLDS
Holds can be created for individual
thermostats with the Hold Mode field on the
Thermostats page. Use the Prior and Next
buttons to navigate to the thermostat where
the hold will be created. The Hold Mode can
be set to temporary or permanent
In Permanent Hold, the Heating and
Cooling fields are used to set the heating
and cooling set points. The Hold
will remain active until the Resume
Schedule button is used to cancel the
hold.
Setting a Permanent or Vacation Hold will
cancel the Temporary Hold.
Setting a Temporary or Vacation Hold will
cancel Permanent Hold.
In Temporary Hold, the Heating and Cooling
fields are used to set the heating and
cooling set points. The End Time field is
used to set the time at which the Temporary
Hold ends. The Hold can be cancelled prior
to the end time using the Resume Schedule
button.
18

The Thermostats status page displays
information for all of the thermostats in
the system. The Heat and Cool columns
show the current heat and cool set points,
which come from either the current event
of the schedule or a hold if there is an
active hold. The Temp column shows
the room temperature value for each
thermostat. The Mode column indicates
what mode of control the thermostat is set
to. The Fan column indicates if the fan is
active. The Schedule column indicates what
schedule the thermostat is assigned to and
the Program column indicates if the schedule
is active or if there is an Active Hold at the
thermostat. The Alarm column will indicate
if there are any active alarms for the
thermostat.
STATUS
The Humidistats status page displays
information for all of the thermostats in the
system. The Humidification Setpoint and
Dehumidification Setpoint columns
show the current humidification and
dehumidification set points. The
Humidity column shows the controlling
humidity value for each humidistat. The
Mode column indicates what mode of
control the humidistat is set to. The Alarm
column will indicate if there are any active
alarms for the humidistat.
19

SETTING ALARMS
Alarms can be configured for sensor
values, the controlling temperature value
for a thermostat and the controlling
humidity value for a humidistat using the
Thermostats/Humidistats page. Use the
Prior and Next buttons to navigate to the
thermostat or humidistat to be configured.
Each alarm can be individually enabled
and have a high and low limit set. When
an alarm is enabled and the value exceeds
either the low or high limit an alarm will
be generated.
The Alarms Exist message will be
displayed on the System Status Bar until
the alarm condition no longer exists. For
example a sensor value returning to a
value above the Low Limit and below
the High Limit.
The Sensors status page displays
information for all the sensors in the
system. The sensor can be identified
by the sensor Name column which
was assigned in the System tab,
Thermostats/Humidistats page.
The sensor can also be identified
using a combination of the Connected to
Humidistat/Thermostat column, which
will identify the thermostat the sensor is
connected to, and the Description column
which will indicate the Support Module
address and sensor number.
The Value column will display the value
that the sensor is reading.
The Alarm column will indicate if the
sensor value has generated an alarm.
20