McQuay OM 897 Installation guide

Operation & Maintenance Data OM 897
Group: PDAC/PDHP
Part Number: 668111001
Date: January 2008
Wireless Temperature Control
For McQuay "Applied" Package Terminal Air Conditioners and Heat Pumps
For replacement parts call 1-800-377-2787
©2008 McQuay International • www.mcquay.com • 800-432-1342 OM 897 Applied PTAC / Page 1 of 12

Page 2 of 12 / OM 897
Contents
Introduction...................................................... 3
Batteries
Installing/Changing ...................................... 3
Replacing..................................................... 3
Mounting
Wall Mount................................................... 4
Back Stand .................................................. 4
Buttons............................................................. 4
Back Light ........................................................ 4
Setting the Clock .......................................... 4-5
Thermostat
Programming ............................................... 5
Navigating.................................................... 6
Exiting the Program Mode ........................... 6
Run Button....................................................... 6
Program/Manual Operation ......................... 6
Changing Temperature ................................... 6
While Running a Program ........................... 6
Installing and Removing Nodes
Installing Nodes ........................................ 6-7
Installing Multiple Nodes.............................. 8
Uninstalling Nodes....................................... 9
Thermostat Reset ............................................ 9
Frequently Asked Questions................... 10-11

OM 897 / Page 3 of 12
Base Plate
Front Cover
Latches
Introduction
The T9000 Wireless Temperature Control is a two-
part wireless thermostat system designed to provide
precision temperature control without the installation
laborandexpenseof wiring. PoweredbyAAbatteries,the
thermostat can operate continuously for approximately
18 months, and can be mounted in any suitable location
that will provide good temperature control. A large
LCD display (Figure 1) provides the user with current
room temperature, set point temperature, time, program
interval, and other system status information. In hotel
applications, programming, clock set up buttons and
associateddisplayinformationaretypicallynotdisplayed.
The second part of the T9000 system is called a Remote
Control Node or “RCN”. An RCN interfaces with specic
desired HVAC equipment, and communicates with its
thermostat using unlicensed 900 MHz, radio frequency
energy. At the time of installation, the T9000 thermostat
is linked to one or more RCN controls. The thermostat
and RCN that have been linked will not interfere with, or
be affected by, any other thermostat or RCN in adjacent
rooms, apartments, or neighboring homes.
Figure 1. T9000 Front View
Batteries
Installing/Changing
Alowbatteryicon willlightonthethermostat
display when the batteries are within approximately
one week of being exhausted. The T9000 is designed
to use standard AA size, 1.5-volt alkaline batteries. If
the batteries become completely depleted, the heating/
cooling system will go to the “Off” state.
Replacing Batteries
To open the thermostat, use both hands and press the
two push-tabs on the bottom of the thermostat housing
withyourthumbswhilepulling thefrontofthe thermostat
away from the base (Figure 2)
Figure 2. Opening Thermostat
The T9000 operates with either two or four AA
batteries. Four (4) batteries double the time between
battery changes (the average user can expect 1 to 1.5
years of battery life). Batteries are paired, one set on top
of the other (see Figure 3).
Figure 3. Battery Location
Circuit Board
Set A Set A
Set B Set B
Thermostat will operate on either Set A,
Set B or both. When changing, replace with all
new batteries. Never use a mix of old and new.
Battery orientation is critical.
Thermostat opened back
Note: Do not mix old and new batteries. When
batteries are changed, replace them all at the same
time.
Programmed data for heating, cooling and time of
day will be lost when batteries are completely removed
or depleted and will have to be re-enterend along with
resettingtheclock.To avoidthis, batteriescanbereplaced
one set at a time before they are depleted. However, after
the rst set is replaced, immediately replace the second
set with new batteries.

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Mounting
Findasuitablelocationformountingyourthermostat,
preferably an interior wall centrally located within the
conditioned space at about 5 feet above the oor. Try
not to locate the thermostat in a place where it could
be exposed to heat such as a warm air vent, or where it
could be exposed to direct sunlight.
Wall-Mount
The T9000 back mounting plate provides six (6)
mountingholes.Theupperandlowerholeson the vertical
centerlinewillmatch upwithscrewpositionsofa standard
electrical switchbox or dry-wall mounting ring.
Step One
Remove the back plate from the thermostat housing
(Figure 2) and use it to mark locations for mounting
holes. While operation of the thermostat is not affected
by orientation, we recommend using a level across the
top or side of the base plate to provide a professionally
installed appearance.
Step Two
Drill 3/8" holes and insert drywall fasteners (#6
screws recommended) and fasten the back plate to the
wall.
Back Stand
Locatedonthebackof thehousingis abuilt-in,hinged
stand support.Thisfeaturepermitsthethermostattostand
on a at surface, such as a table or shelf, in the event that
a permanent mounting to the wall is not desired.
Buttons
Four buttons are located on the front of the
T9000.
Figure 4.
Fan Up Down Heat/Cool
These buttons are used in adjusting fan operation,
changing the set point temperature up or down, and
changing the operating mode of the thermostat. See
Figure 1 & 11 for front view of the thermostat and button
locations. Figure 4 shows the display items that are
changed by these four buttons in normal operation.
Figure 5. General Operation Display
Note that the UP, DOWN and HEAT/COOL buttons
are also used in setting the clock and programming the
thermostat, and linking to nodes. This will be covered
in the following sections of the manual.
Four buttons located on the left side of the thermostat
(refer to Figure 1 & 11) control display of temperature in
either Fahrenheit or Celsius, programming, clock setup
and control of whether the thermostat is under manual
or program control.
• F / C – Toggles Fahrenheit Celsius display
• Program set up button
• Run – Sets program or manual mode of
operation
• Clock set up button
Backlight
Asinglebutton onthe righthandsideofthe thermostat
activates the display backlight. When pressed, the
backlight will illuminate the display briey and turn off. If
other buttons are pressed immediately after the backlight
button, the display will stay illuminated until a few
seconds after all button activity has ended. Backlighting
takes signicant energy from the batteries and should be
used sparingly. Frequent use of the backlight function
will noticeably reduce battery life.
Setting The Clock
In all setup modes, the T9000 will ash the display
item you are about to change. The UP and DOWN
buttons change settings, the HEAT/COOLbutton is used
to move to the next item.
To set the clock, you will use the buttons marked
CLOCK, UP, DOWN, and HEAT/COOL.

OM 897 / Page 5 of 12
Step 1
Press the CLOCK button. The hour digits will ash.
Press the UP or DOWN button to change the hour. Note
thatAM/PM will change as you roll the hour past twelve.
Be sure to set the hour properly for AM or PM. Press
the HEAT/COOL button to keep the hour you’ve just
set and move to minutes.
Step 2
The minute digits will now be blinking. Press the UP
or DOWN button to change to the desired minute. When
the correct minute is ashing press HEAT/COOL.
Step 3
One of the seven day icons (Mo, Tu, We, Th, Fr, Sa,
SU) will now ash. Press UP or DOWN until the correct
day icon is ashing. When the correct day is ashing,
press HEAT/COOL.
Step 4
Press the clock button to keep all clock changes
you’ve made and resume normal operation.
Thermostat
Programming
The T9000 provides for program periods: Morning,
Day, Evening, and Night. The time and temperature can
be set for each period. Upon initial power-up the T9000
loads time and temperature program default parameters
for weekday and weekend days of the week. The default
program perimeters conform to Energy Star guidelines,
and are a good point from which to start.
Default settings are:
Weekday Default Program Times
and Temperatures
Period Time Heat Cool
Morning 6:00 AM 70° 75°
Day 8:00 AM 62° 83°
Evening 6:00 PM 70° 75°
Night 11:00 PM 62° 78°
Weekday Default Program Times
and Temperatures
Period Time Heat Cool
Morning 8:00 AM 70° 75°
Day 10:00 AM 62° 83°
Evening 6:00 PM 70° 75°
Night 11:00 PM 62° 78°
Separate heating and cooling programs can be
entered. The mode of the thermostat is displayed in the
upper right side of the LCD screen. Figure 1, for instance,
shows a thermostat in COOL mode. The mode the
thermostat is in when the PROGRAM button is pressed
is the mode that will be controlled by the program. If it
is in the cool mode, as shown in Figure 1, the program
entered will be stored as the program for cooling.
To program the thermostat, you will use the
PROGRAM, HEAT/COOL, UP, and DOWN buttons.
Step 1
The press the PROGRAM button to put the
thermostat into the programming mode. The display will
blink all of the day of the week icons. Pressing the UP
or DOWN button will toggle between (weekday) icons
and the (weekend) icons. Ensure the display is blinking
the day you want to program. Press HEAT/COOL.
Step 2
Next the morning period will blink. Use the UP or
DOWNbuttontotogglethroughMorning,Day,Evening,
or Night, stopping at the period you want to program.
Press HEAT/COOL.
Step 3
Next, the hour of the day will blink. This is the
starting hour of the period you have selected. Use the
UP or DOWN button to change the selected hour start
time. Press HEAT/COOL.
Step 4
The minute of the day will blink next. This is the
starting minute in the hour. Use the UPor DOWN button
to change the minute digits to the desired setting. (Note
that the minutes change in ve-minute increments.) Press
HEAT/COOL.
Step 5
The desired set point will now be blinking. This is
the temperature set point for the time of day you have
selected. Press the UP or DOWN button to change the
set point temperature to what you want. Press HEAT/
COOL.
This completes the programming of the rst period
of the day.
Step 6
If you started with the morning time period, the next
period, day, willnowbeblinking.Follow stepstwo, three,
four, and ve for each period you wish to program.

Page 6 of 12 / OM 897
Navigating
You can quickly step through to a specic item you
want to change by pressing the HEAT/COOLbutton until
the item you want to change is ashing. When that item
is ashing, use the UP or DOWN button to adjust.
Exiting Program Mode
Pressing the program button at any time will exit out
of the programming mode, save your changes to memory
and return to normal thermostat operation.
Run Button
Program / Manual Operation
The RUN button toggles the thermostat between
manual operating mode and program operating mode.
When in the program mode your thermostat responds
to the times and temperatures programmed.
Figure 6. Program Mode Display
Figure 6 showsthethermostatrunning in theprogram
mode. One of the four periods, in this case “Day”, is
displayed, letting you know which period of the day it
is in. When in the manual mode as shown in Figure 7,
the period of the day is not displayed. Instead the word
“Hold” willbedisplayedabovetheSetpoint temperature,
indicating the thermostat is holding that temperature.
In manual mode, you can adjust the desired
temperature using the UP and DOWN buttons, and
the thermostat will maintain the temperature until you
change it again.
Figure 7. Manual Mode Display
Changing Temperature While Running
A Program
You can always change the temperature up or
down while a program is running. However, when the
program moves to the next period, the program set point
temperature for that period will take effect. For instance,
assume the current program period is Evening, with a
programmed temperature of 70°, and the next period,
Night, is programmed for 65°, scheduled to start at 11:00
PM. If during the Evening time period you desired the
space to be warmer, you could press the UP button to
raise the temperature set point. The thermostat will hold
that temperature until the next program period, at which
point the temperature will adjust to the programmed
temperature set point for that period. In this case the
Night period is set for 11:00 PM and 65°.
Installing and Removing Nodes
A T9000 thermostat and remote control node will
not operate as a system until they are linked together
throughtheinstallation process.Thelinkingprocessbinds
one or more control nodes to a thermostat so that they
will communicate with each other as a control system.
Up to eight nodes can be linked to a single thermostat.
Until linked, the control node will not operate. Once
linked, a control mode will only respond to its specic
thermostat. The thermostat and RCN that have been
linked will not interfere with, or be affected by, any other
thermostat or RCN in the adjacent rooms, apartments,
or neighboring homes. Linking information is stored
in non-volatile memory – it is not necessary to Re-link
the thermostat and RCN if the thermostat batteries are
removed, or after a power outage.
Installing Nodes
Ifmultipleinstallationteamsareinstalling andlinking
thermostats at the same time, coordinate the activity
to avoid the possibility of installers simultaneously
attempting to perform the linking process. Because
this is an RF system, installers in nearby rooms/areas
where it is possible RF overlap could exist, run the risk
of interfering with each other. Installation and linking
activity going on around a system already installed will
not interfere with it.
Refer to Figure 8 for inside thermostat buttons and
jumper locations and functions.

OM 897 / Page 7 of 12
Figure 8. Internal Buttons
Installing Nodes
Step 1
Press the SW4-INSTALL. button inside the
thermostat. The display will change to the Install
Session screen shown in Figure 8, with the “install”
icon blanking.
The display always blinks the item that is active
and can be changed.
Step 2
The UP button on the front of the thermostat is used
to toggle between the following two choices:
Install - Install a Node
Remove - Uninstall ALL Nodes
(The Remove option will be discussed later.)
Figure 9. Install Setup Display
Press the HEAT/COOL to select install.
Step 3
The node number digits will now ash. Use the UP
button to set the node number you wish to install 0-7. If
this is the rst node or only node to be installed to this
thermostat, leave the node number at zero.
Press the HEAT/COOL button to select the node
number.
Step 4
The control node can be installed to a thermostat as a
HEAT only, COOL only or HEAT & COOL node. After
selecting the node number, the HEAT and/or COOLicon
will ash in the upper right hand quarter of the display is
shown in Figure 8. Press the UP button to scroll through
the following three choices:
Heat - Install node as a heating only control
Cool - Install node as a cooling only control
Heat/Cool - Install node as a heating and cooling
control
PresstheHEAT/COOLbuttonwhentheappropriate
icon is displayed.
SW12-RESET SW4-INSTALL SW9-LINK
PB1-NETWORK
Set A Set A
Set B Set B
SW12-RESET SW4-INSTALL SW9-LINK Internal T9000 buttons
PB1-NETWORK
Used to uninstall the thermostat
from node(s) it has been linked to.
SW12-RESET
Master Reset – Returns
thermostat to all factory defaults.
SW4-INSTALL
Starts an installation session.
SW9-LINK
Used to Link the thermostat to
control nodes.
PB1-NETWORK
JP3 - Program
JP4 – Non Program
Program Jumper
JP3 = Programmable
JP4 = Non-Programmable

Page 8 of 12 / OM 897
At this point all selections have been made and
nothing on the display should be blinking. You are now
ready to install a node.
Note: There are several types of remote control nodes
that can be linked to the T9000 thermostat. Refer to
a specic node documentation for details about the
nodes you are using. In every case, a node is linked to
a thermostat using the same procedure as described,
and involves either pressing the Link Service Request
button on the node, or powering the node up from the
“Off” state.
Step 5
Press the SW9-LINK button on the back of the
thermostat printed circuit board. Within 5-seconds,
activate the link service request on the control node you
are installing by the following method:
Model 122 - 24VAC Node – Apply power or press
PB3
When the SW9-LINK button is pressed, the
thermostat will display a “Please Wait” message (see
Figure 10) in the bottom right corner of the LCD while it
searches for a node.You have several seconds to initiate a
Link Service Request atthecontrolnode.Oftenitiseasiest
to have the thermostat in your hand while you are near the
node. The thermostat will link with the rst node it hears
that indicates a Link Service Request. It is for this reason
that multiple installations must be coordinated. (see note
in Installing Nodes section.) Once the thermostat nds
a node, linking information is exchanged, the “Please
Wait” message is extinguished, and a “Good” message
will appear as shown in Figure 10.
Figure 10. Install – Link Display
If another node is to be installed to this thermostat,
press the HEAT/COOL button again. The “Install” icon
will ash. As was done previously, press the HEAT/
COOL button (Step Two). The node number will begin
blinking, select the node number by one using the UP
button and continue with the remaining steps. When all
nodes are installed, press the SW4-INSTALL button
to close the installation session and return to normal
thermostat operation.
If for any reason there was a problem encountered
during the nal installation and linking step, a “Bad”
message will be displayed. If this happens, repeat the
“Installing Nodes” process from the beginning. If the
problem persists, perform a “Thermostat Installation
Reset” (see below) and repeat the “Installing Nodes”
process.
Installing Multiple Nodes to a Thermostat
Multiple nodes are typically installed to athermostat
by linking each as a different number (0-7). If a node
is not sending a signal to the thermostat for any reason,
such as loss of power, it will turn off the antenna symbol
indicating a break in communication and attempt to nd
the missing node, increasing battery power drain. If, in
your application, a node may be removed or powered
downat times,consider linkingall nodes asthesamenode
number, node 00 for instance. As long as the thermostat
hears back from at least one node, it will consider the
communication to be good. (See Frequently Asked
Questions, page 10)

OM 897 / Page 9 of 12
Un-Installing Nodes
Un-installing nodes, the procedure to remove will
un-install all nodes at once.
Step 1
Press the SW4-INSTALL button inside the
thermostat. The Install icon will ash. Press the UP
button to select “Remove” and press HEAT/COOL to
select. The HEAT and/or COOL icons will be displayed
and all display items will be on steady; nothing will be
ashing.
Step 2
Press the SW9-LINK button on the back of the
thermostat printed circuit board. Within 5-seconds,
activate a Link Service Request on the control node.
When the SW9-LINK button is pressed, the thermostat
will display the “Please Wait” message (see gure 10)
in the bottom right corner of the LCD while it searches
for nodes. Once the thermostat nds its installed node(s),
linking information is removed from the nodes and the
thermostat, “please wait” message will be extinguished,
and a “Good” message will appear as shown in
Figure 10.
Thermostat Installation Reset
In the event there is difculty installing a node,
perform the following:
Step 1
Press the SW4-INSTALL button inside the
thermostat. The install icon will ash. You only need to
begin the installation session to perform this reset.
Step 2
Press and hold the PB1-NETWORK button (see
Figure 8) on the inside of the thermostat board for
approximately two seconds.
No response is displayed. All previous installation
records will be wiped from the thermostat memory.
You can continue from this point with the installation
procedure. PB1-NETWORK will only reset the
thermostat installation database if the thermostat is
alreadyin anInstallationSession(SW4-INSTALLbutton
has been pressed). Otherwise, the PB1-NETWORK
button will have no affect.

Page 10 of 12 / OM 897
Frequently Asked Questions
“Where should I locate my thermostat?”
For best results, the thermostat should be located
approximately 5 feet above the oor on an inside wall
in an area with good air circulation. Avoid drafts from
your air ducts and windows, and heat from the sunlight,
lighting xtures, appliances, replaces, etc.
“What does the antenna symbol on the display
mean?”
TheT9000thermostatdisplaystheantennasymbolas
indication thatitiscommunicatingwithitsremotecontrol
node(s) (RCN). If communication is not established, the
antenna symbol will go out.
“What do I do if the antenna symbol is no longer
displayed?”
EnsuretheRCNhaspower. Makesure thethermostat
and RCN are in fact linked. Force the thermostat to talk
to its RCN by pushing the FAN button. If communication
is successful, the antenna icon will turn back on.
Coincidental RF interference could cause a temporary
loss of communication. In virtually all such cases, the
interference is temporary.
“Can I run multiple heating or cooling loads such
as electric baseboard heating and a window air
conditioner with one T9000 thermostat?”
Yes. In fact one T9000 thermostat can control up to
eight different RCNs.
“Why would I install multiple nodes as the same
number?”
Aresidential example might be several space heaters
being controlled by one thermostat. Space heaters are
portable and may be moved. A wall plug control node
could on occasion be unplugged. If it is installed to its
thermostat as a different node number, the thermostat
will always look for that node, increasing the number
of times it attempts communication. If all nodes are
installed as the same number and the thermostat hears
from at least one, it will consider the communication
good. In a hotel meeting room with multiple packaged
terminal air conditioner units, seating may be arranged
such that one unit blows air directly on some people.
The thermostat in this case will not continuously look
for a missing node if that one unit is powered off.
“When my a/c. turns off, I can’t immediately make
it run again?”
This is normal. What you are experiencing is called
in anti short-cycle delay. Because of high pressure in the
air conditioning compressor system, it’s not a good idea
to start your air conditioner immediately after it has just
shut down. The T9000 prevents this from happening by
imposing a 3-minute delay.
“I just installed the thermostat and the antenna
symbol comes and goes. What should I do?”
A poor RF signal between the thermostat and
one or more RCNs is the cause. The further away the
thermostat and RCN are from each other, the weaker the
signal becomes. Distance and also building materials,
particulary metals, will block the RF signal energy. Sheet
metal is very often the problem. Changing the position
of the RCN or thermostat or both may be required. In
rare cases, where the RCN is heavily shielded, a small
section of sheet metal may need to be removed and if
necessary replaced with plastic or other nonmetallic
material.
Note: Always seek competent professional electrical and
HVAC contractors when working with your heating and
cooling system and the electrical wiring in your home or
other property. For safety and warranty reasons, always
consult with a HVAC contractor and/or the original
equipment manufacturer before making changes.
“The display on my thermostat is blank. What
happened?”
A blank display indicates your batteries are
depleted. When the low battery icon comes on there is
approximatelyoneweekofbatteryliferemaining(seethe
Batteries - Installing/Changing section of this manual for
information on changing the batteries). We recommend
that when you change batteries, always use batteries that
you know are fresh. Use four (4) new high quality AA
batteries. If you’re using the T9000 to control a heating
system, we recommend as a general practice, putting
fresh batteries in at the start of the heating season.

OM 897 / Page 11 of 12
“If I am away for an extended time such as vacation,
how do I set the thermostat so my system does not
run excessively ?”
You have a couple of choices. The rst is to press
the HEAT/COOL button on the thermostat until the
display reads “OFF” (Particularly during the heating
season, we do not recommend going to the “off” mode.)
The second option is to put your thermostat in manual
mode by pressing the RUN button.You know that you’re
in the manual mode because none of the period icons,
Morning, Day, Evening, or Night will be displayed. The
“Hold” icon located above the set point temperature
will be displayed (Refer to Figure 7). Next, adjust the
set point temperature to minimize system operation.
For example, you could adjust to a set point of 85°F
in cooling, or 65°F in heating, staying mindful of what
your temperature selection could affect such as plants
and animals that stay in your home while you are away.
During the cooling season, consider humidity as well as
room temperature. When your air conditioner runs, it not
only cools the air, it also removes moisture, lowering
humidity. High humidity can encourage mold growth.
“Can I use another T9000 thermostat without
interference?”
Yes. A T9000 thermostat and its RCN will talk
between themselves, but will never respond to or control
another thermostat in adjacent rooms, apartments, or
neighboring homes.
Figure 11. T9000 Overview

For replacement parts call 1-800-377-2787
©2008 McQuay International [phone] www.mcquay.com OM 897 / 1-08 Page 12 of 12
McQuay Training and Development
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For training information on all McQuay HVAC products, please visit us at www.mcquay.com and click on training, or
call 540-248-9646 and ask for the Training Department.
Warranty
All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited
Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form
933-43285Y. To nd your local McQuay Representative, go to www.mcquay.com.
This document contains the most current product information as of this printing. For the most up-to-date
product information, please go to www.mcquay.com.