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T6 -- PAC, T6 -- PHP,  
T6 -- NAC, T6 -- NHP  
PREFERREDt SERIES  
AC / HP THERMOSTAT  
Installation Instructions  
A07045  
A07044  
Programmable Control  
Non --- Programmable Control  
NOTE: Read the entire instruction manual before starting the installation.  
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TABLE OF CONTENTS  
PAGE  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
INSTALLATION CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
SYSTEM START -- UP AND CHECKOUT . . . . . . . . . . . . . . . . . . . . . . . . . . 36  
OPERATIONAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43  
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45  
THERMOSTAT CONFIGURATION RECORD . . . . . . . . . . . . . . . . . . . . . . 54  
SAFETY CONSIDERATIONS  
Read and follow manufacturer instructions carefully. Follow all local electrical  
codes during installation. All wiring must conform to local and national electrical  
codes. Improper wiring or installation may damage AC/HP Control.  
Recognize safety information. This is the safety -- alert symbol  
. When you see  
this symbol on the equipment and in the instruction manual, be alert to the  
potential for personal injury.  
Understand the signal words DANGER, WARNING, and CAUTION. These  
words are used with the safety -- alert symbol. DANGER identifies the most  
serious hazards which will result in severe personal injury or death. WARNING  
signifies a hazard which could result in personal injury or death. CAUTION is  
used to identify unsafe practices which may result in minor personal injury or  
product and property damage. NOTE is used to highlight suggestions which will  
result in enhanced installation, reliability, or operation.  
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INTRODUCTION  
Bryant’s 7 -- day, 5/2 -- day, 1 -- day programmable and non -- programmable  
Preferredt Series Thermostat Control is a wall -- mounted, low -- voltage control  
which combines temperature and humidity control in either a single unit or a  
two -- piece unit. In two -- piece configuration, the relays are located near the  
equipment and a two -- wire connection is used between the Display Module and  
the Equipment Control Module. Single -- piece installation requires more wiring  
and results in a higher profile. The Preferred Series Thermostat has no need for  
batteries to store user -- configured settings in memory. During power loss its  
internal memory saves settings for unlimited time, and the clock continues to run  
for at least 24 hours. An extension of Bryant’s proven line of thermostats; it  
provides separate setpoints for heating and cooling in addition to humidification  
and dehumidification.  
In the control’s programmable configuration, different heating and cooling  
setpoints and times are programmable for 4 periods per day or 2 periods per day.  
Programming can be done for 7 days per week, 5/2 days per week, or 1 day. The  
programmable Thermostat Control can also be user configured as  
a
non -- programmable Thermostat Control. When operating as non -- programmable,  
the Preferred Series Thermostat Control will still have both temperature and  
humidity control.  
The non -- programmable Thermostat Control features Touch ’N’ Got settings  
for quick and easy temperature change without complicated programming  
schedules. The non -- programmable Preferred Series Thermostat Control will still  
have both temperature and humidity control. And, its Touch ’N’ Go technology  
enables the user to switch between three different user -- configurable settings  
through intuitive buttons located just below the display.  
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INSTALLATION CONSIDERATIONS  
Power  
This control is powered by 24VAC only. It requires 24VAC (Rh and/or Rc and C  
terminals) of the low -- voltage transformer to be connected to it for proper  
operation. It will not operate without these 2 connections. Rh and Rc are  
connected via PCB breakout jumper. See Fig. 1. For applications using two  
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4VAC transformers, one in the indoor unit and one in the outdoor unit, connect  
the common from each to the C terminal. Connect R from the indoor unit to the  
Rh terminal. Connect R from the outdoor unit to the Rc terminal. Then, break  
jumper on the circuit board. The W and HUM signals are taken from the Rh  
power and the G signal is taken from the Rc power. If Thermidistat Control has  
been installed in a two -- transformer application that is later changed to a  
single -- transformer installation, installer must install a field supplied jumper  
between Rc and Rh. Depending on the installation, up to 14 wires may be  
required. Installation as two -- piece unit is recommended. Only 2 wires are  
required for connection between Display Module and Equipment Control  
Module. These two wires (V+ and Vg) do not provide ordinary 24VAC. They  
carry a combination of power and communications data that is unique to these  
products.  
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A07052  
Fig. 1 -- PCB Breakout Jumper  
Models  
There are programmable and non -- programmable models for all applications.  
They can be configured for AC or HP installations, allowing it to be used in  
place of all Bryant thermostats. Programmable thermostats may be configured as  
non -- programmable if user desires.  
Outdoor Temperature Sensor  
The outdoor air temperature sensor is not included with the AC/HP Control. It is  
available as an accessory, part number TSTATBBSEN01 -- B. Optimum  
performance is obtained when an outdoor temperature sensor is used with the  
AC/HP Control. Plan installation so that 2 wires can be run from Equipment  
Control Module to an outdoor location, preferably on the north side of the house  
or refer to Installation Instructions included with the outdoor temperature sensor  
for simplified connection. Sensor can be mounted to outdoor unit and existing  
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dedicated sensor wires may be used for its connection. Details are provided in  
sensor instructions.  
Remote Indoor Temperature Sensor  
A remote temperature sensor may be used with the programmable heat pump  
and programmable air conditioner thermostats where it is desirable to install the  
thermostat in a limited access location while measuring the temperature in the  
living space. The remote room sensor may be used as a stand alone or average  
with local sensor.  
Two-Piece Thermostat Configuration  
The Preferred Series AC/HP Control can be installed in one of two  
configurations. The control may be installed as a single -- piece thermostat or it  
may be split into two pieces and mounted in separate locations. As a single -- piece  
unit, all required wiring must be brought to the Equipment Control Module for  
connection to the terminal strip. In two -- piece configuration, the Display Module  
can be mounted in the living space while the Equipment Control Module may be  
mounted near the indoor furnace or fan coil. Connection from the display to the  
Equipment Control Module requires only two wires. All other control wires are  
connected to the Equipment Control Module from the HVAC equipment. This  
configuration results in a slimmer display and locates the Equipment Control  
Module containing the switching relays away from the main living space where  
relay clicking will not be heard.  
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INSTALLATION  
Carton contains the following components. See Fig. 2 for programmable models  
or Fig. 3 for non -- programmable models.  
A07756  
Fig. 2 -- T6 -- PAC / T6 -- PHP Carton Contents  
1
2
3
4
. Display Module  
. Stand -- off for Equipment Control Module  
. Screws and pig tail  
. Equipment Control Module  
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A07757  
Fig. 3 -- T6 -- NAC / T6 -- NHP Carton Contents  
. Display Module  
. Stand -- off for Equipment Control Module  
. Screws and pig tail  
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2
3
4
. Equipment Control Module  
AC/HP Control Location  
AC/HP Control should be mounted:  
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Approximately 5 ft (1.5m) from floor.  
Close to or in a frequently used room, preferably on an inside parti-  
tioning wall.  
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On a section of wall without pipes or duct work.  
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AC/HP Control should NOT be mounted:  
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S
Close to a window, on an outside wall, or next to a door leading to the  
outside.  
Exposed to direct light or heat from a lamp, sun, fireplace, or other  
temperature -- radiating objects which could cause a false reading.  
Close to or in direct airflow from supply registers and return -- air regis-  
ters.  
In areas with poor air circulation, such as behind a door or in an al-  
cove.  
Installer should determine whether control will be installed as single -- piece or  
two -- piece. In single -- piece configuration, as many as 14 wires may need to run  
to wall mounting location for connection to the control. In two -- piece  
configuration, the Display Module and Equipment Control Module are  
connected by two wires.  
Install AC/HP Control  
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WARNING  
ELECTRICAL OPERATION HAZARD  
Failure to follow this warning could result in personal injury or  
death.  
Before installing AC/HP Control, turn off all power to  
equipment. There may be more than 1 power disconnect.  
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!
CAUTION  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment damage  
or improper operation.  
Improper wiring or installation may damage AC/HP Control.  
Check to make sure wiring is correct before proceeding with  
installation or turning on power.  
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. Turn off all power to equipment.  
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. If an existing thermostat is being replaced  
a. Remove existing thermostat from wall.  
b. Disconnect wires from existing thermostat, 1 at a time.  
c. As each wire is disconnected, record wire color and terminal marking.  
d. New or additional wire may be needed to accommodate added hu-  
midity outputs.  
e. Discard or recycle old thermostat.  
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!
CAUTION  
ENVIRONMENTAL HAZARD  
Failure to follow this caution may result in environmental  
damage.  
Mercury is a hazardous waste. Federal regulations require that  
Mercury be disposed of properly.  
Two-Piece Installation  
The following steps should be followed for the installation of the two -- piece  
configuration.  
NOTE: The 2 -- wire pigtail is not intended to support the weight of the User  
Interface. Do not hang the User Interface from the equipment Control Module  
screw terminals.  
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. Remove mounting plate from back of Display Module by pressing the  
two tabs on the bottom edge and pulling away. See Fig. 4 and 5.  
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A07225  
Fig. 4 -- Press Tabs to Remove Backplate  
A07226  
Fig. 5 -- Take Apart  
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2
. Route wires through large hole in mounting base. Level mounting base  
against wall (for aesthetic value only—Display Module need not be lev-  
eled for proper operation) and mark wall through 2 mounting holes. See  
Fig. 6.  
A07165  
Fig. 6 -- Backplate Mounting  
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4
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. Drill two 3/16 -- in. mounting holes in wall where marked. Thermostat may  
be mounted to a standard junction box, if desired. Hole pattern on ther-  
mostat mounting base matches junction box mounting holes.  
. Secure rear plastic mounting base to wall with 2 screws and anchors pro-  
vided. Additional mounting holes are available for more secure mounting  
if needed. Make sure all wires extend through hole in mounting base.  
. Adjust length and routing of each wire to reach proper connector block  
and terminal on mounting base with 1/4 -- in. extra wire.  
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. Match and connect equipment wires to proper terminals of each connector  
block being careful not to over tighten the screws. Correct polarity must  
be observed when connecting the two wires from the Equipment Control  
Module to