Bryant Preferredt Series User manual

Installation Instructions
T6-PAC01-A, T6-PHP01-A,
T6- NAC01- A, T6- NHP01- A
PreferredtSeries
AC / HP Thermostat
A07045 A07044
Programmable Control Non- Programmable Control
NOTE: Read the entire instruction manual before starting the installation.
US patents: US7287709 B2, US20080147242 A1, USD582800 SI,
US20060165149 A1, US6956463 B2.

1
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1................................
INTRODUCTION 2..........................................
INSTALLATION CONSIDERATIONS 3..........................
INSTALLATION 6...........................................
SYSTEM START- UP AND CHECKOUT 39......................
OPERATIONAL INFORMATION 42............................
TROUBLESHOOTING 46.....................................
WIRING DIAGRAMS 50......................................
THERMOSTAT CONFIGURATION RECORD 59..................
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,andCAUTION.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.

2
INTRODUCTION
Bryant’s 7-day, 5/2- day, 1-day programmable and non-programmable Preferredt
Series Thermostat Control is a wall- mounted, low- voltage temperature 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 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.
The non- programmable Thermostat Control features Touch ’N’ Gotsettings for
quick and easy temperature change without complicated programming schedules.
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.

3
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 24VAC 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
signal is taken from the Rh power and the G signal is taken from the Rc power. If
thermostat 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.

4
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 dedicated sensor
wires may be used for its connection. Details are provided in sensor instructions.

5
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.
The model numbers on the Display Module and the Equipment Control Module
(ECM) must match or unpredictable results may occur.
Two- wire pigtail replacement part number is TX-2WR- 05.
Wiring
For all wiring applications, use 22 AWG or larger wire. Continuous wire lengths
over 100 ft. (30.5 m) should use 20 AWG or larger. Wire lengths are not to exceed
250ft.(76m)perrun.

6
INSTALLATION
UNIT DAMAGE HAZARD
Failure to follow the recommended wiring practices could result in
damage to the wall control and personal property.
Improper wiring or installation may damage AC/HP Control. Check
to make sure wiring is correct before proceeding with installation or
turning on power.
CAUTION
!
Installation Notes:
SNo part of the control should be installed directly outdoors or in a cabin-
et outdoors.
SNever remove the thermostat board from the plastic housing. Doing so
could warp and damage the components on the board.
SThe control assembly should be mounted before wires are attached.
SDuring thermostat installation, provide sufficient excess wiring behind
the mounting plate. Coil the wiring, creating a service loop, and place in
mounting box or behind the wall to remove strain against the terminal
strip. See Fig. 2.

7
A13295
Fig. 2 - Coil Excess Wiring
A07756
Fig. 3 - T6- PAC01- A / T6- PHP01- A Carton Contents

8
Carton contains the following components. See Fig. 3 for programmable models or
Fig. 4 for non-programmable models:
1. Display Module
2. Stand-off for Equipment Control Module
3. Screws and pig tail
4. Equipment Control Module
A07757
Fig. 4 - T6- NAC / T6- NHP01- A Carton Contents
1. Display Module
2. Stand-off for Equipment Control Module
3. Screws and pig tail
4. Equipment Control Module
AC/HP Control Location
AC/HP Control should be mounted:

9
SApproximately 5 ft (1.5m) from floor.
SClose to or in a frequently used room, preferably on an inside partition-
ing wall.
SOn a section of wall without pipes or duct work.
AC/HP Control should NOT be mounted:
SClose to a window, on an outside wall, or next to a door leading to the
outside.
SExposed to direct light or heat from a lamp, sun, fireplace, or other tem-
perature- radiating objects which could cause a false reading.
SClose to or in direct airflow from supply registers and return- air regis-
ters.
SIn areas with poor air circulation, such as behind a door or in an alcove.
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
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.
!WARNING

10
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.
CAUTION
!
1. Turn off all power to equipment.
2. 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. Discard or recycle old thermostat.
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.
CAUTION
!

11
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.
1. Remove mounting plate from back of Display Module by pressing the two
tabs on the bottom edge and pulling away. See Fig. 5 and 6.
A07225
Fig. 5 - Press Tabs to Remove Backplate

12
A07226
Fig. 6 - Take Apart
2. Route wires through large hole in mounting base. Level mounting base
against wall (for aesthetic value only—Display Module need not be leveled
for proper operation) and mark wall through 4 mounting holes. To avoid
unintended bending of wall plate plastic, use all 4 screws and anchors. See
Fig. 7.

13
A07165
Fig. 7 - Backplate Mounting
3. 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 thermo-
stat mounting base matches junction box mounting holes.
4. Secure rear plastic mounting base to wall with 4 screws and anchors pro-
vided. To avoid unintended bending of wall plate plastic, use all 4 screws
and anchors Make sure all wires extend through hole in mounting base.
5. Adjust length and routing of each wire to reach proper connector block and
terminal on mounting base with 1/4- in. (6mm) extra wire.
6. 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 Mod-
ule to the thermostat mounting base. If wires are connected incorrectly, the
Display Module will not operate. See Fig. 8, 9 and 10.

14
Relays
OAT
RRS
SRTN
HUM
D1
D2
V+
Vg
Rc
Rh
W / W1
G
Y/Y2
Y used for
single stage
cooling
C
O/W2/B
Y1
Y1 used for
multi-speed
cooling
Y1 = stage 1
Y2 = stage 2
Control Module Wiring Guide
connect
to user
interface
dry
contact
OAT /
RRS
return
{
Relays
OAT
RRS
SRTN
HUM
D1
D2
V+
Vg
Rc
Rh
W / W1
G
Y/Y2
Y used for
single stage
cooling
C
O/W2/B
Y1
Y1 used for
multi-speed
cooling
Y1 = stage 1
Y2 = stage 2
Control Module Wiring Guide
connect
to user
interface
dry
contact
OAT /
RRS
return
{
A07687
Fig. 8 - Control Module Wiring Guide
HUM terminal is not used on this model.
SRed is V+
SBlack is Vg

15
A07166
Fig. 9 - Secure Wires to Terminal Strip
A07167
Fig. 10 - Connect Pigtail Wires to Display Module

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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.
SRed is V+
SBlack is Vg
7. Push any excess wire into wall and against mounting base. Seal hole in wall
to prevent air leaks. Leaks can affect operation and cause incorrect tempera-
ture and/or humidity measurement.
8. Make sure to attach 2- wire pigtail to Display Module mounting base. It is
packed loose in the box from the factory. Then attach 2-wire pigtail to the
back of the Display Module via 2 pin, keyed connector.
9. Reattach Display Module body to mounting base by first setting on at top of
mounting base and then push bottom corners of Display Module to snap
into place. See Fig. 11.
A07169
Fig. 11 - Attach Display to Backplate

17
10. Find suitable indoor mounting location for Equipment Control Module, ei-
ther near or on equipment. See Fig. 12.
IMPORTANT NOTE: Equipment Control Module should not be mounted to duct
work or below any other controls or equipment (i.e. humidistat, humidifier, etc.).
A07217
Fig. 12 - Equipment Control Module on Equipment
11. Route wires through rear of Equipment Control Module using either a clear-
ance hole or supplied standoff. See Fig. 13.

18
A07227
Fig. 13 - Standoff
NOTE: Standoffs are provided as an aid when installing Equipment Control
Module on inside equipment or a solid wall.
12. 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 Mod-
ule to the thermostat mounting base. If wires are connected incorrectly, the
Display Module will not operate. See Fig. 8 and 9.
13. Snap cover over top of Equipment Control Module. See Fig. 14.