Bryant LEGACY T2-PAC Manual de usuario

Installation Instructions

T2--PAC, T2--NAC

T2--PHP, T2--NHP

LEGACYtSERIES THERMOSTATS

A07047 A07046

Legacy Series Legacy Series

Programmable Thermostat Non ---Programmable Thermostat

NOTE: Read the entire instruction manual before starting the installation

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS 3....................................

INTRODUCTION 4..............................................

INSTALLATION CONSIDERATIONS 4..............................

INSTALLATION 5...............................................

Step 1 — Thermostat Location 5...................................

Step 2 — Install Thermostat 6......................................

Step 3 — Set Thermostat Configuration 10...........................

Step 4 — Check Thermostat Operation 18............................

FEATURES AND ACCESSORIES 19................................

OPERATIONAL AND CONNECTION INFORMATION 21..............

WIRING DIAGRAMS 24..........................................

THERMOSTAT CONFIGURATION RECORD 25......................

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 thermostat.

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.

INTRODUCTION

Bryant’s LegacytSeries programmable thermostats are wall--mounted,

low--voltage thermostats which maintain room temperature by controlling the

operation of a heating and/or air conditioning system. Both heat pump and air

conditioner models are available, each in programmable and non--programmable

versions. A variety of features are provided including battery operation, separate

heating and cooling setpoints, auto changeover, keypad lockout, backlighting,

and built--in installer test. Programming features include 7--day (all days the

same) and 5/2 (Mon--Fri and Sat--Sun) with 2 or 4 periods per day.

This Installation Instruction covers installation, configuration, and startup of all

four versions of the Legacy Series line of thermostats. For operational details,

consult the Owner’s Manual for the specific thermostat you are installing.

INSTALLATION CONSIDERATIONS

Models

There are four models in the Legacy Series: programmable and non--programmable,

AC and HP. Models T2--PAC and T2--NAC are designed for AC systems,

controlling one stage of cooling and one stage of heating. They will not operate a

heat pump. Models T2--PHP and T2--NHP are designed for HP systems, controlling

one stage of cooling and two stages of heating. They can be converted to AC

operation. Select the appropriate model for the intended application.

Power

All Legacy Series models are dual powered. They can operate from batteries or

24VAC power. Operation from 24VAC is preferred if available. Battery

operation is used when there are not enough wires to support 24VAC operation

or when “armchair programming” is desired. For an AC system, 5 wires are

needed for 24VAC operation and 4 wires for battery operation. For a HP system,

6 wires are needed for 24VAC operation and 5 wires are sufficient for battery

operation. For heat only operation with batteries, only 2 wires are required.

When battery operation is used, the C terminal does not need to be connected.

Provision is also made for separate heating and cooling transformers via separable

Rc and Rh terminals which are connected via a factory--installed jumper wire.

INSTALLATION

Step 1 — Thermostat Location

SApproximately 5 ft (1.5m) from floor.

SClose to or in a frequently used room, preferably on an inside

partitioning wall.

SOn a section of wall without pipes or duct work.

Thermostat 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 the sun, a lamp, fireplace, or other

temperature--radiating objects which could cause a false reading.

SClose to or in direct airflow from supply registers and return--air

registers.

SIn areas with poor air circulation, such as behind a door or in an

alcove.

Step 2 — Install Thermostat

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing thermostat, turn off all power to equipment.

There may be more than 1 power disconnect.

!WARNING

1. Turn OFF all power to unit.

2. If an existing thermostat is being replaced:

a. Remove existing thermostat from wall.

b. Disconnect wires from existing thermostat, 1 at a time. Be careful not

to allow wires to fall back into the wall.

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

3. Open thermostat (mounting base) to expose mounting holes. The base

can be removed to simplify mounting. Press the thumb release at the top

of the thermostat and snap apart carefully to separate mounting base from

remainder of thermostat.

4. Route thermostat wires through large hole in mounting base. Level mounting

base against wall (for aesthetic value only—thermostat need not be level for

proper operation) and mark wall through 2 mounting holes. See Fig. 1.

A07153

Fig. 1 -- Backplate Mounting

5. Drill two 3/16--in. mounting holes in wall where marked.

6. Secure mounting base to wall with 2 anchors and screws provided

(additional anchoring holes available for more secure mounting if needed)

making sure all wires extend through hole in mounting base.

7. Adjust length and routing of each wire to reach proper terminal and

connector block on mounting base with 1/4 in. of extra wire. Strip only

1/4 in. of insulation from each wire to prevent adjacent wires from

shorting together when connected. See Fig. 2.

A07155

Fig. 2 -- Secure Wires to Terminal Strip

8. Match and connect equipment wires to proper terminals of the connector

blocks (see Fig. 3). If there are separate 24VAC transformers, one in the

indoor unit and one in the outdoor unit, connect the common of each to the

C terminal. Remove factory--installed jumper wire from Rc and Rh terminals.

Connect the R from the indoor unit to the Rh terminal. Connect the R from

the outdoor unit to the Rc terminal. Then the W signal is taken from the Rh

power and the Y, G and O signals are taken from the Rc power.

O/B - reversing valve

Not used

Rc - 24 VAC, from cooling equipmen

Rh - 24 VAC, from heating equipmen

W - Heating

C - Common 24 VAC

G - Fan

Y - Cooling

A07159

Fig. 3 -- Terminal Designations

ELECTRICAL OPERATION HAZARD

Failure to follow this caution may result in equipment damage

or improper operation.

Improper wiring or installation may damage the thermostat.

Check to make sure wiring is correct before proceeding with

installation or turning on unit.

CAUTION

9. Push any excess wire into wall and against mounting base. Seal hole in

wall to prevent air leaks. Leaks can affect operation.

10. Snap case back together. Attach thermostat to backplate by inserting tab

on bottom edge and hinging up until top snap secures. See Fig. 4

A07158

Fig. 4 -- Attach Thermostat to Backplate

11. Close thermostat assembly making sure pins on back of circuit board

align with sockets in connector.

12. Turn ON power to unit.

When power is applied, all display icons are lit for 2 seconds to test the display.

Following this, the equipment type for which the thermostat is configured is

displayed for an additional 2 seconds. It will be one of HP, AC, H, PH, PC or C (see

explanation under Step 3, Option 01 below). A HP thermostat configured to operate

an AC (see Option 1 below) will display AC. An AC thermostat cannot display HP.

NOTE: If a common wire has not been connected, two AA batteries must be

used to power the thermostat.

Step 3 — Set Thermostat Configuration

Configuration options enable the installer to configure the thermostat for a particular

installation. Most are not presented to the homeowner and therefore must be properly

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