Bryant T6-NHP, T6-PAC, T6-NAC, T6-PHP User Manual

T6−PAC, T6−PHP, T6−NAC, T6−NHP PREFERREDt SERIES AC / HP THERMOSTAT

Installation Instructions

A07045 A07044

Programmable Control Non-Programmable Control

Designed and Assembled in the U.S.A.

NOTE: Read the entire instruction manual before starting the installation.

US patents: US7287709 B2, US20080147242 A1, USD582800 SI, US20060165149 A1, US6956463 B2.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION CONSIDERATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SYSTEM START−UP AND CHECKOUT 38. . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATIONAL INFORMATION 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

WIRING DIAGRAMS 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

THERMOSTAT CONFIGURATION RECORD 58. . . . . . . . . . . . . . . . . . . . . .

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.

INTRODUCTION

Bryant’s 7−day, 5/2−day, 1−day programmable and non−programmable Preferred 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’ Go settings 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.

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.

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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.

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

Wire length should be no more than 250 ft (76m). Use 22 AWG for normal wiring applications. Continuous wire lengths over 100 ft (30.5m) should use 20 AWG or larger.

INSTALLATION

Carton contains the following components. See Fig. 2 for programmable models or Fig. 3 for non−programmable models.

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Fig. 2 − T6−PAC / T6−PHP Carton Contents

1. Display Module

2. Stand−off for Equipment Control Module

3. Screws and pig tail

4. Equipment Control Module

Fig. 3 − T6−NAC / T6−NHP 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:

 Approximately 5 ft (1.5m) from floor.  Close to or in a frequently used room, preferably on an inside parti-

tioning wall.

 On a section of wall without pipes or duct work.

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AC/HP Control should NOT be mounted:

 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

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

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.

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.

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.

1. 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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Fig. 4 − Press Tabs to Remove Backplate

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Fig. 5 − 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. 6.

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Fig. 6 − 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 thermostat 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. (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 Module to the thermostat mounting base. If wires are connected incorrectly, the Display Module will not operate. See Fig. 7, 8 and 9.

Control Module Wiring Guide

Relays

OAT

OAT /

RRS

RRS return

return

{

SRTN

HUM

dry

dry contact

contact

connect

V+

to user

interface

Fig. 7 − Control Module Wiring Guide

HUM terminal is not used on this model.

 Red is V+

 Black is Vg

Rh W / W1

W / W1

G Y/Y2

Y/Y2

C O/W2/B

O/W2/B Y1

Y1 used for

Y1 used for multi-speed

multi-speed cooling

cooling Y1 = stage 1

Y1 = stage 1 Y2 = stage 2

Y2 = stage 2

Y used for

Y used for single stage

single stage cooling

cooling

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Fig. 8 − Secure Wires to Terminal Strip

Fig. 9 − 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.

 Red is V+

 Black 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 temperature 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. 10.

A07169

Fig. 10 − Attach Display to Backplate

10. Find suitable indoor mounting location for Equipment Control Module, either near or on equipment. See Fig. 11.

IMPORTANT NOTE: Equipment Control Module should not be mounted to duct work or below any other controls or equipment (i.e. humidistat, humidifier, etc.).

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Fig. 11 − Equipment Control Module on Equipment

11. Route wires through rear of Equipment Control Module using either a clearance hole or supplied standoff. See Fig. 12.

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Fig. 12 − 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 Module to the thermostat mounting base. If wires are connected incorrectly, the Display Module will not operate. See Fig. 7, 8 and 9.

13. Snap cover over top of Equipment Control Module. See Fig. 13.

A07218

Fig. 13 − Cover on Equipment Control Module

14. Turn on power to equipment. On power up, all display segments will light for 5 sec. For the next 5 sec a 2−digit code appears on large display which identifies AC/HP Control configuration. Refer to Option 33.

a. AC — 1−stage air conditioner, AC, with furnace or fan coil

b. HP — 1−stage heat pump, HP only with fan coil

c. H — heating only system, furnace only or fan coil with electric

heat only

d. C — cooling only system, AC with fan coil

e. H2 — 2−stage heat pump with fan coil

f. A2 — 2−stage air conditioner with fan coil or furnace

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