Carrier Programmable Dual Fuel Thermostats Operations Instructions download pdf

Programmable Dual Fuel Thermostats

Installation, Start-Up, and Operating Instructions

NOTE: Read the entire instruction manual before starting the

installation.

This symbol → indicates a change since the last issue.

INDEX

Page

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

INTRODUCTION..........................................................................1

SYSTEM CONSIDERATIONS ....................................................1

APPLICATION..............................................................................2

DESCRIPTION OF OPERATION ............................................2-3

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

INSTALLATION......................................................................3-12

Thermostat Location.................................................................3

Set DIP Switches...................................................................3-4

Install Thermostat .....................................................................4

Set Thermostat Configuration...............................................4-6

Check Thermostat Operation....................................................6

Final Settings ............................................................................7

Checklist....................................................................................7

WIRING DIAGRAMS .............................................................7-10

OPERATIONAL INFORMATION.............................................11

TROUBLESHOOTING ...............................................................11

CONFIGURATION RECORD....................................................12

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 installa-

tion 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, and CAU-

TION. These words are used with the safety-alert symbol. DAN-

GER 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 would result in minor personal

injury or product and property damage.

INTRODUCTION

Carrier’s 7-day programmable dual fuel thermostat is a wall-

mounted, low-voltage thermostat which provides proper control of

a heat pump (HP) and furnace combination without using a

HP/furnace interface kit. Separate heating and cooling set points,

plus auto changeover allow setback programming for maximum

energy savings. Up to 4 time/temperature settings per 24 hour

period for 7 independent days may be programmed. Batteries are

not required; during a power interruption, the internal memory

stores programs for an unlimited time and the clock continues to

run for at least 72 hrs.

→ SYSTEM CONSIDERATIONS

The dual fuel thermostat is designed to be used only in HP/furnace

installations. It replaces a conventional 2-stage HP thermostat and

a HP/furnace interface kit. An outdoor temperature sensor, Part

No. TSTATXXSEN01-B MUST be used with this thermostat. It is

supplied with thermostat.

If HP is not already equipped with a high-pressure switch, one

must be added for dual fuel applications. It protects HP from

overpressure which would occur if a failure resulted in both

HP and furnace operating at same time. Kit No.

KSAHI0201HPS includes required switch and instructions

for its proper installation.

A HP/furnace installation has several special requirements. Fore-

most is that furnace and HP must not be allowed to operate at same

time, except during HP defrost. A second is to have furnace

complete a heating cycle once it is turned on. A third is the need

to have HP not operate at all when outdoor temperatures are below

a certain value. A fourth is to have the furnace not operate at all

when outdoor temperatures are above a certain higher value.

Finally, HP and furnace must work together properly to provide an

efficient and comfortable defrost. These requirements are ad-

dressed by the dual fuel thermostat itself and an interface kit is

NOT required.

As an ENERGY STAR Partner, Carrier Corporation has

determined that this product meets the ENERGY STAR

guidelines for energy efficiency.

→ Fig. 1—Carrier Programmable Thermostat

A98426

HEIGHT (IN.) WIDTH (IN.) DEPTH (IN.)

4-1/4 7-1/2 1-3/8

Visit www.carrier.com

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 4

Tab misc. misc.

PC 101 Catalog No. 03TS-TA9 Printed in U.S.A. Form TSTAT-18SI Pg 1 10-98 Replaces: TSTAT-9SI

1 2 ... 12

Summary of Contents

Page 1 - Visit www.carrier.com

Programmable Dual Fuel ThermostatsInstallation, Start-Up, and Operating InstructionsNOTE: Read the entire instruction manual before starting theinstal

Page 2

→ WIRING DIAGRAM NOTES:1. Heat pump MUST have a high pressure switch for dual fuel applications.2. Outdoor Air Temperature Sensor must be attached in

Page 3 - → Table 1—Heating Stages

→ OPERATIONAL INFORMATIONFive-minute Compressor TimeguardThis timer prevents the compressor from starting unless it has been off for at least 5 minute

Page 4

A98449DUAL FUEL THERMOSTAT CONFIGURATION RECORDDateOwner/OperatorA) Hardware Configuration Switch A Not Used. Do Not Turn On. (OFF = Dual Fuel

Page 5

→ APPLICATIONThe dual fuel thermostat is designed for the following applications:1-stage cool, 2-stage heat: 1-speed HP with 1-stage furnace1-stage co

Page 6

Defrost OperationA unique feature of this thermostat is that a defrost cycle, oncestarted, will always be completed. This is true even if thermostat i

Page 7

Switch B - Select Smart or Normal Setback RecoverySelects between normal and smart recovery from setback. Normalrecovery changes to the new set point

Page 8 - See notes 1, 2, 3, 4, and 9

press of SET TIME/TEMP button switches between the availableoption (small display) and the available selections within eachoption (large display).CONF

Page 9

TO SELECT:1. Enter configuration mode if not already there. See above. Useup and down buttons to make small (now flashing) displayindicate 13.2. Press

Page 10

Step 6—Final Settings1. Assuming the system is to be left in operation after theinstallation is complete, use MODE button to select betweenHEAT, COOL,

Page 11 - → Thermostat Troubleshooting

→ Fig. 4—Two-Stage Furnacewith Single-Speed Heat PumpA98562O/W2Y1/W2W/W1GRRGDUAL FUELTHERMOSTATTWO-STAGEFURNACESINGLE-SPEEDHEAT PUMPW/W1CYW2OCBLS1S2RY

Page 12 - WAKE DAY EVE SLEEP

→ Fig. 8—Variable-Speed Furnacewith Single-Speed Heat PumpA98445O/W2Y1/W2W/W1GRRGDUAL FUELTHERMOSTATVARIABLE-SPEEDCONDENSINGFURNACESINGLE-SPEEDHEAT PU