Rheem Comfort Control2 Assembly instructions

Comfort Control2 HD Thermostat
Serial Communications
featuring
INSTALLER GUIDE

2 Installer’s Guide
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR OPERATING THIS
CONTROL AND SYSTEM COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
ATTENTION: MERCURY NOTICE
This product does not contain mercury,
but it may replace a product that contains
mercury.
Mercury and products containing mercury
must not be discarded in household
trash. Do not touch any spilled mercury.
Wearing non-absorbent gloves, clean
up any spilled mercury and place it in a
sealed container. For proper disposal of
a product containing mercury or a sealed
container of spilled mercury, place it in a
suitable shipping container.
On the Internet, visit www.white-rodgers.
com for a location where the product
containing mercury can be sent.
To prevent electrical shock and/or
equipment damage, disconnect electric
power to system at main fuse or circuit
breaker box until installation is complete.
WARNING
Thermostat installation and all
components of the control system shall
conform to Class II circuits per the NEC
code.
WARNING
INTRODUCTION TO THERMOSTAT AND COMMUNICATING
SYSTEM
This is the dealer installation and start-up instruction guide for the
Comfort Control2HD Communicating Thermostat. It features a flexible
programming sequence for residential applications. It is designed to
control components of a 24VAC residential ClimateTalkTM communicating
system consisting of gas or electric heat, heat pump, and central air
conditioning applications. The high-resolution color display offers easy
readability, intuitive programming with individual touch buttons to the
right of the screen, on-screen prompting, pop-up message alerts to
change filter, or regular servicing check-ups, and an exchangeable
faceplate. The thermostat has a USB port for contractor setup.
The thermostat’s major features include 40o to 99oF setpoint range,
1oresolution, 3.5-inch diagonal ¼ VGA LCD, auto configure, auto-
changeover, selectable continuous fan speeds, humidity control,
dehumidification control, dual fuel control, advanced diagnostics and
fault code display, advanced installer menu, simultaneous heat and
cool program storage, a four-step daily schedule sequence, energy
management recovery, filter change-out indicator, replace UV lamp
indicator, change Humidifier pad and program loss start up temperature.
Note: If system power is lost for more than eight hours, the clock will have
to be reset. Programming and configuration settings will be saved.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 3
Equipment User Menus
Installation......................................................................................................... 4
Wiring Requirements .................................................................................... 4
Quick Installation Steps ................................................................................ 5
Installing Thermostat..................................................................................... 5
Initial Power Up............................................................................................. 7
Check System Operation .............................................................................. 9
Thermostat Overview ....................................................................................... 11
Thermostat Setup............................................................................................. 13
Set Current Time and Day ............................................................................ 13
Choose the System Setting .......................................................................... 14
Energy Saving Factory Pre-Program ............................................................ 14
Advanced Installer Menu ................................................................................. 15
Equipment User Menus.................................................................................... 20
Furnace User Menus .................................................................................... 22
Air Handler User Menus ............................................................................... 28
Heat Pump User Menus ............................................................................... 31
Air Conditioner User Menus.......................................................................... 35
System Fault Codes ......................................................................................... 38
Table of Contents

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
4 Installer’s Guide
Equipment User Menus
This booklet contains installation instruction and information on the
thermostat only. Separate installation instructions for the furnace or air
handler and outdoor AC condensing unit or heat pump are provided.
This thermostat is designed exclusively for the ClimateTalkTM
communicating system.
Wiring Requirements
Each communicating device in the system has a four wire connection labelled (R, C,
1, 2). Each R, C, 1, and 2 terminals must be wired consistently. Maximum length from
the thermostat to the indoor unit is 100 feet. Maximum length from the indoor unit to the
outdoor unit is 125 feet.
To uchscreen Indoor Outdoor
R
C
1
2
R
C
1
2
R
C
1
2
24VAC (Hot)
24VAC
(Common)
Data 1
Data 2
Installation

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 5
Equipment User Menus
Quick Installation Steps
Determine location of thermostat installation.
Mount thermostat base to wall.
Connect wires to thermostat base.
Attach thermostat to base.
Turn on power to system. Allow approximately 1 minute for the system to configure.
Set the time
Select advanced installer menu settings or use USB upload feature to install
Thermostat Configuration information
Perform thermostat/system operation checkout.
Program thermostat or accept factory programming.
Touch to run schedule.
Installing thermostat
Carefully separate the thermostat body from the thermostat base.
Place base at installation location and mark mounting hole locations on wall using
base as a template.
Move base out of the way. Drill mounting holes.
Attach base snugly to wall using two mounting screws. Levelling is for appearance
only and will not affect thermostat operation.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
6 Installer’s Guide
Equipment User Menus
Connect wires to terminal block on base.
Push excess wire into wall and plug hole with a fire resistant material (such as
fiberglass insulation) to prevent drafts from affecting thermostat operation.
Carefully line up the thermostat with the base and snap into place.
Removable Faceplate
The silver faceplate on the thermostat can
be removed and replaced with the white
faceplate included. To change the faceplate:
Remove faceplate by gently pulling on
the tabs behind the lower edge of the
faceplate. Lift faceplate off of thermostat.
Position faceplate on top edge of
thermostat.
Press on bottom of faceplate to snap faceplate
back into position. Tabs

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 7
Equipment User Menus
Initial Power Up
Turn on AC power to the system. The thermostat will
automatically identify the communicating equipment
installed and configure for the equipment as required.
Messages at Thermostat
As equipment is found on the network, the display will
show, “device” Found. The Searching icon will show until
all equipment is found and configured. If no equipment is
found on the network after approximately five minutes, the
home screen will appear and indicate a Fault.
If the indoor unit is not detected by the network, “Check
System Fault” will be found.
Check system wiring if one of these faults occur.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
8 Installer’s Guide
Equipment User Menus
The display will change to Start-up, Hold screen showing
the actual temperature, SYSTEM position (HEAT)
mode, FAN setting (AUTO), HOLD AT with the setpoint
temperature 62 for heat or 85 for cool and real time clock
(hour, minute, AM or PM, day).
Communications Systems
The ClimateTalkTM protocol will set the identification of the individual nodes connected
to the thermostat. The Network Device display will appear during initial power up and
when a new device is found on the network.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 9
Equipment User Menus
Check System Operation
Heating System (Heat Pump only/Furnace only/Dual Fuel)
1. Press SYSTEM button until Heat is displayed.
2. Press to adjust thermostat setting 1° above room temperature. The heating
system should begin to operate and the display will indicate Heat On.
3. If the heating system has additional stages, adjust the thermostat setting to 3°F
(2°C) or more above the actual temperature. The next heat stage will energize.
Note: To check heat pump systems, it is better to use Equipment Heat Pump User
Menu, Heat Setup to disable heat pump staging. Also, set Aux Lockout Temperature
so indoor heat is not disabled. Be sure to enable heat pump staging and set Aux
Lockout Temperature after checking system.
4. Press to adjust thermostat setting below room temperature. The heating system
should stop operating.
Cooling System
1. Press SYSTEM button until COOL is displayed.
2. Press to adjust thermostat setting below room temperature. The cooling system
should begin to operate and the display will indicate Cool On.
3. If the cooling system has additional stages, adjust the temperature to 3°F (2°C) or
more below the actual. The second cool stage will energize within 10 seconds.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
10 Installer’s Guide
Equipment User Menus
4. Press to adjust thermostat setting above room temperature. The cooling system
should stop operating.
Fan Operation
1. Press FAN button until Fan On is displayed. The fan should begin to operate.
2. Press FAN button to change the display to Fan Auto. The fan should stop operating
as long as there is no call for heat or cool.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 11
Equipment User Menus
Thermostat Overview
Navigating through your thermostat menus
Your thermostat features a simplified easy to understand menu structure.
Press to enter the Main Menu
Highlight a menu item using the or buttons
Enter the item by pressing
Use the or and the or to change menu items and settings
Press the Home button to display the Home Screen.
Press the Enter button to save any changes you have
made and display the previous menu item.
If no button is pressed for two minutes, you will return to the home screen
without saving changes.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
12 Installer’s Guide
Equipment User Menus
Main Menu
Press to enter menu. The Main Menu lists the menus
that access and set thermostat operating options and
programming. Use or to highlight selection

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 13
Equipment User Menus
Set the Current Time and Day
On the Main Menu, select and enter
Clock and Display Settings.
Select and Enter Time & Date.
The Hour is selected. Adjust the hour with
or .
Press to select Minutes, AM/PM,
Month, Day and Year and adjust.
The thermostat will automatically assign
the correct day of the week after the date
is set.
Press the Enter button.
Thermostat Setup

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
14 Installer’s Guide
Equipment User Menus
Choose the System Setting
From the Home screen, press the button as shown
to choose the system setting: Heat, EM, Cool, Auto,
or Off.
Energy Saving Factory Pre-Program
Your thermostat is programmed from the factory with the energy saving settings shown
below for every day of the week. If this program meets your needs, simply select either
Heat, Cool, or Auto with the System button.
Factory Pre-Programmed Heating and Cooling Schedule
If you want to change the heating and/or cooling programs in your thermostat, see
the “Programming Your Thermostat” section in the Homeowner’s Guide.
Wake Up
(Morning)
Leave for Work
(Day)
Return Home
(Evening)
Go to Bed
(Night)
Heating Program 6:00 AM 70oF 8:00 AM 62oF 5:00 PM 70oF 10:00 PM 62oF
Cooling Program 6:00 AM 75oF 8:00 AM 83oF 5:00 PM 75oF 10:00 PM 78oF

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 15
Equipment User Menus
Advanced Installer Menu
This menu allows the installer to check installer-specific information or set advanced
settings. It is accessible from the Home screen when the and buttons are pressed
at the same time for three seconds.
Select the items using the or buttons and press the button to enter the item
to view information or change settings. Press Enter button to save any changes and
display the previous menu or press Home to display the Home Screen. If 2 minutes
pass without any buttons pressed, the Home Screen will return and changes will not be
saved.
Items on the Advanced Installer Menu are:
Communicating Devices Aux Lockout*
Fault Status Dual Fuel Setpoint: 5°*
USB Upload Heat Cycle Rate: Medium
Thermostat Summary Cool Cycle Rate: Medium
Heat Pump Disable* Humidity Display Adjust
*Items marked with * may or may not appear in the list depending on the
configuration of the system.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
16 Installer’s Guide
Equipment User Menus
Communicating Devices: This menu item will list each piece of system
equipment connected to the ClimateTalkTM network. The equipment can be selected
and entered to view identifying information, operating information and setup status as
described in Equipment User Menus.
Fault Status: This menu item lists current equipment fault conditions. The system
equipment experiencing the Fault will be listed with details of the fault. If no faults are
detected, this screen will show nothing.
USB Upload: The USB load menu displays a list
of thermostat parameters that can be loaded to the
thermostat from a USB memory device. If the USB
port detects a USB memory device, this menu will
automatically display.
Contractors should link to www.Rheemote.net and
select: Departments/PTS/Thermostats.
In the USB Upload menu, select the item to upload and press to mark the item with
a red box. After all items to upload are selected, press the Upload button.
The USB media must have properly formatted information to be recognized by the
thermostat. If the thermostat does not find information, when the Upload button is
pressed, the display will indicate, “Invalid Data Found. Installation Failed!”

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 17
Equipment User Menus
Once the Upload button is pressed and the upload is
accomplished, the display will indicate “Successfully
Installed” for 3 seconds then the display will display the
menu or mode prior to entering the USB upload menu.
Heat Pump Disable - Available only for heat pump
systems with indoor electric heat. This feature disables
the heat pump and turns on electric heat below the
selected outdoor temperature. The temperature range is
from 5°to 50°F.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
18 Installer’s Guide
Equipment User Menus
Aux Lockout Temperature - Available
for heat pump systems. This feature disables the indoor
(electric or gas) heat above the selected outdoor
temperature. The temperature range is from the Heat
Pump Disable setting to 95°F.
Dual Fuel Setpoint: If the heating system is a heat
pump with gas heat and the outdoor sensor is installed,
the thermostat can monitor outside temperature to
determine when to begin using the gas heat system and
stop the compressor. This temperature is the Dual Fuel
temperature setpoint. The Dual Fuel feature eliminates
the need for a fossil fuel kit.
The display will indicate 5° (default). The temperature
can be adjusted to a value between 5° to 50°. The
temperature will appear as °F unless °C is selected for temperature display.
As long as the outside temperature is above the Dual Fuel Setpoint, the compressor
will operate. When the temperature drops below the setting the thermostat will start the
gas heat and shut off the compressor.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
Installer’s Guide 19
Equipment User Menus
Heat Cycle Rate - Anticipation for heat cycle can be
adjusted. Default setting is Medium. If you wish to have
longer heat cycles, change to Slow. For shorter heat
cycles change to Fast.
Cool Cycle Rate - Anticipation for cool cycle can be
adjusted. Default setting is Medium. If you wish to have
longer heat cycles, change to Slow. For shorter heat
cycles change to Fast.
Humidity Display Adjust - Default is 0%. This
option allows you to change the humidity displayed to
match other thermostats in your home.

Installation
Thermostat Overview
Thermostat Setup
Advanced Installer Menu
20 Installer’s Guide
Equipment User Menus
Equipment operating information and options will be found on the Advanced Installer
Menu in Communicating Devices. Equipment fault status and details will be found in
Fault Status.
Equipment User Menus
In the Communicating Devices menu, select the equipment listed that you wish
to see information for. The display will indicate “Accessing the Device”. The list of
parameters for the equipment will appear. Select the parameter you wish to view.
Each Equipment User Menu has submenus to divide the information into categories.
Each piece of equipment has a different set of submenus, with different parameters
depending on the equipment. The submenus show similar information for each piece of
equipment. The submenus and the information they provide are:
Equipment User Menus