Bryant Preferred T6-PRH01-B User manual

Installation Instructions
T6--PRH01--B, T6--NRH01--B
PreferredtSeries
Thermidistat
A07045 A07044
Programmable Control Non--Programmable Control
Designed and Assembled
in the USA.
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 7...........................................
SYSTEM START--UP AND CHECKOUT 45......................
OPERATIONAL INFORMATION 55............................
TROUBLESHOOTING 60.....................................
WIRING DIAGRAMS 64......................................
THERMIDISTAT CONTROL CONFIGURATION RECORD 84.......
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 Thermidistat 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 Preferred
Series Thermidistat 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 Thermidistat 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 programmable configuration of the Preferred Series Thermidistat Control,
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 Thermidistat Control can also be user
configured as a non--programmable Thermidistat Control. When operating as
non--programmable, the Thermidistat Control will still have both temperature and
humidity control.
The non--programmable Thermidistat Control features Touch ’N’ Gotsettings for
quick and easy temperature change without complicated programming schedules.
The non--programmable Thermidistat 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.

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 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.

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, 1--or 2--speed compressor, and for Hybrid Heatt
installations, allowing it to be used in place of all Bryant thermostats.
Programmable Thermidistat Controls may be configured as non--programmable if
user desires.
Humidify Equipment and Connections
The humidify output connects directly to 24VAC operated humidifiers. No other
connection or interlock is required. Any of several installer--selectable operating
modes are available.

5
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
DO NOT connect furnace HUM terminal directly to Thermidistat
Control HUM terminal. This will bypass furnace safety controls. See
Low Voltage Wiring Diagrams and notes for proper connection.
!WARNING
Dehumidify Equipment and Connections
The dry contact output connects to the dehumidify input on variable--speed
furnaces and fan coils. Additional dehumidification is done by controlling the
compressor. A variety of operating modes are available. The dry contact must be
configured for dehumidification in setup Option 19. See Wiring Diagrams for more
information.
Outdoor Temperature Sensor (TSTATBBSEN01--B)
Outdoor air temperature sensor is included in the box with the Thermidistat Control.
Optimum performance is obtained when an outdoor temperature sensor is used with
the Thermidistat 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 control wires may be used for its connection. Details are provided in sensor
instructions.

6
Remote Indoor Temperature Sensor
A remote temperature sensor may be used with the programmable model, where it
is desirable to install the Thermidistat Control 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 Thermidistat Control Configuration
The Preferred Series Thermidistat Control can be installed in one of two
configurations. The control may be installed as a single--piece Thermidistat 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--2WR05.
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.

7
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 Thermidistat 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.

8
A13295
Fig. 2 -- Coil Excess Wiring
A07752
Fig. 3 -- T6--PRH01--B Carton Contents

9
Carton contains the following components. See Fig. 3 for T6--PRH01--B or Fig. 4
for T6--NRH01--B:
1. Display Module
2. Stand--off for Equipment Control Module
3. Outside Air Temperature Sensor, screws and pigtail.
4. Equipment Control Module
A07753
Fig. 4 -- T6--NRH01--B Carton Contents
1. Display Module
2. Stand--off for Equipment Control Module
3. Outside Air Temperature Sensor, screws and pigtail.
4. Equipment Control Module
Thermidistat Control Location
Thermidistat Control should be mounted:
SApproximately 5 ft (1.5m) from floor.

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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.
Thermidistat 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 Thermidistat Control
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing Thermidistat Control, turn off all power to
equipment. There may be more than 1 power disconnect.
!WARNING

11
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Improper wiring or installation may damage Thermidistat 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 Thermidistat Control or thermostat is being replaced:
a. Remove existing control 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 wires may be needed to accommodate added humid-
ity outputs.
e. Discard or recycle old control.

12
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
!
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.

13
A07225
Fig. 5 -- Press Tabs to Remove Backplate
A07226
Fig. 6 -- 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 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.
A07165
Fig. 7 -- Backplate Mounting
3. Drill two 3/16--in. mounting holes in wall where marked. Thermidistat Con-
trol may be mounted to a standard junction box, if desired. Hole pattern on
Thermidistat Control mounting base matches junction box mounting holes.
4. Secure rear plastic mounting base to wall with 4 screws and anchors
provided. 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. (6 mm) extra wire.

15
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
Module to the Thermidistat Control mounting base. If wires are connected
incorrectly, the Display Module will not operate. See Fig. 8, 9 and 10.
A08072
Fig. 8 -- Control Module Wiring Guide
SRed is V+
SBlack is Vg

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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 of the pigtail is V+
SBlack of the pigtail 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

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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.