Bryant LEGACY T2-PAC, LEGACY T2-NAC, LEGACY T2-PHP, LEGACY T2-NHP, A07047 Installation Instructions Manual

T2--PAC, T2--NAC
T2--PHP, T2--NHP
LEGACYt SERIES THERMOSTATS

Installation Instructions

A07047 A07046

Legacy Series Legacy Series

Programmable Thermostat Non --- Programmable Thermostat

NOTE: Read the entire instruction manual before starting the installation

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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
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

. When you see

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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 Legacyt Series 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 Serie s : programma bl e and non--programmable,
AC and HP. Models T2--PAC and T2--NAC are designe d 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 sta ge of cooling and two st ages of heating. They can be converted t o AC
operation. Select the appropri ate model for the intended applicati on.

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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 fact ory--installed jumper wire.

INSTALLA TION

Step 1 — Thermostat Location

S Approximately 5 ft (1.5m) from floor.

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

partitioning wall.

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

Thermostat should NOT be mounted

S Close to a window, on an outside wall, or next to a door leading to the

outside.

S Exposed to direct light or heat from the sun, a lamp, fireplace, or other

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

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

registers.

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

alcove.

Step 2 — Install Thermostat

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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.

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.

WARNING

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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.

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—ther mostat need not be level for
proper operation) and mark wall through 2 mounting holes. See Fig. 1.

CAUTION

A07153

Fig. 1 -- Backplate Mounting

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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 c onnect equi pment wires to proper ter minals of the connector
blocks (see Fi g. 3). If there are separ ate 24VAC transformers, one in the
indoor unit and one in the outdoor unit, connect the common of each to the
C terminal. Remove factory--instal led 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 .

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Rc - 24 VAC, from cooling equipmen

t

t

Rh - 24 VAC, from heating equipmen

W - Heating

C - Common 24 VAC

O/B - reversing valve

Not used

G - Fan

Y - Cooling

A07159

Fig. 3 -- Terminal Designations

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CAUTION

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.

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

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