EWC Controls EWT-3102, EWT-3103 User Manual

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EWT-3102/EWT-3103 Touchscreen

Programmable Thermostat

EWC Controls, Inc. 385 HWY 33, Englishtown, NJ 07726 Ph: 732-446-3110 Fx: 732-446-5362

Room

Running As SCHED

SYSTEM

MORE SCHED HOLD CLOCK

SCREEN

AUTO

FAN

WED

AUTO

HEAT

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Contents

Application/Features................................................................................................................2

Specifications/Ordering Information........................................................................................ 4

Installation..............................................................................................................................14

Wiring.....................................................................................................................................18

Power the Thermostat............................................................................................................35

Installer Setup.........................................................................................................................48

Installer System Test......................................................... ... ... ... ... ...... .. .... ... ........ .. .... ..... ........59

Operation................................................................................................................................62

Programming ..........................................................................................................................68

Troubleshooting . …..................................................................................................................98

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

PRODUCT DATA

APPLICATION

The EWT-3102/EWT-3103 Touchscreen Programmable Thermostat is an effortless, 7-Day programmable thermostat that provides universal system compatibility, precise comfort control and is easy-to-program. The EWT-3102/EWT-3103 Thermostats provide temperature control for gas, oil, electric and heat pumps for up to 3 heats, 2 cool systems including dual fuel operation plus dehumidification control.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

FEATURES

·Large, clear display with backlight shows the current and set temperature and thermostat in the dark.

·Menu-driven programming make setup effortless.

·Beautiful ergonomic design is smart and sophisticated to match your customer

lifestyle.

·Touchscreen interaction

·Real-time clock keeps time during power failures and automatically updates to

daylight savings.

·"Sav ing Changes" notification let s you kno w when the schedul e changes have been saved.

·Change/check reminders let y ou know when to service or replace filters or batteries

·Various Hold options allow you to override the program schedule, as desired.

·Armchair programming allows you to remove the thermostat from the wall for

programming.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

SPECIFICATIONS

Thermostat Description:

Feature

Description

Powering methods Common wire with battery backup System types (up to3 heat/2 cool)

·Gas, oil or electric heat with air conditioning

·Warm air, hot water, high-efficiency furnaces, heat

pumps, steam and gravity

·Heat on

ly inclu

des power to open and power to close zone valves(series 20) and normally-open zone valves

·Heat only with fan

·Cool only

·750 mV heating systems

Changeover Manual or Auto changeover selectable System setting Heat-Off-Cool-Auto (Emer for heat pumps) Fan setting Auto-On-Circ

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Electrical Ratings:

Terminal

Voltage (50/60 Hz) Running Current

W Heating 20 - 30 VAC 1.0A Max W Heating (Power pile) 750 mVDC 100 mA Y Cooling 20 - 30 VAC 1.0A Max G Fan 20 - 30 VAC 0.6A Max

Temperature Setting Range: Heating: 40°F to 90°F (4°C to 32°C). Cooling: 50°F to 99°F (10°C to 37°C).

Operating Ambient Temperature: 32°F to 120°F (0°C to 49°C).

Shipping Temperature: EWT-3102/EWT-3103 Thermostats: -30 °F to 150 °

(-34.4°C to 65.6°C).

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Operating Relative Humi dity (Non-condensing):

EWT-3103 Thermostats: 5% to 90%. IAS-1: 5% to 95%. OAS-1: 5% to 95%.

Humidity Setting Range (EWT-3103 models only): Cooling: 40% to 80% RH.

Humidity Display Range (EWT-3103 models only): 0% to 99%.

Cycle Rates (at 50% Load): Heating: Selectable 1 - 12 cycles per hour. Cooling: Selectable 1 - 6 cycles per hour.

Clock

ccuracy: +/- 1 minute per month.

Batteries:

Two replaceable AA alkaline batteries: Power thermostats when 24 VAC common is not used. Non-replaceable lithium battery with ten-year life under normal use to hold calenda

and time settings. Alkaline batteries keep calendar and time after lithium battery is no longe

functional.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Cool Indication: EWT-3102/EWT-3103 Touchscreen Thermostats show "Cool On" on the screen when Cool is activated.

Heat Indication: EWT-3102/EWT-3103 Touchscreen Thermostats show "

Heat On

" on the screen when Heat

is activated.

Auxiliary Heat Indication: EWT-3102/EWT-3103 Touchscreen Thermostats show "

x Heat On" on the screen when

uxiliary Heat is activated.

Emergency Heat Indication: EWT-3102/EWT-3103 Touchscreen Thermostats show "

at On" on the screen when

Emergency Heat is activated and the System mode is in the Emer position.

Calibration: EWT-3102/EWT-3103 Touchscreen Thermostats are factory-calibrated and require no field calibration.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

ORDERING INFORMATION

If you have additional questions, need further information, or would like to comment o n our products or services, please e-mail: info@ewccontrols.com or phone: 1-800-446-3110.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Nomenclature:

Series System Stages

Application

EWT-3102 EWT-3103

3H/2C EWT-3102 - Standard

EWT-3103 - Humidity Sensor

Mounting Means: EWT-3102/EWT-3103 Touchscreen Thermostat: Mounts directly on the wall in the living space using mounting screws and anchors provided. Outdoor Sensor: Mounts outside of living space with mounting clip and screws provided. Remote Indoor Sensor: Mounts directly on the wall using mounting screws and anchors provided.

Dimensions:

1. EWT-3102/EWT-3103 Touchscreen Thermostat: see Fig 1.

2. EWT-3102/EWT-3103 Touchscreen Thermostat Back Case: see Fig. 2

3. EWT-3102/EWT-3103 Outdoor Sensor Mounting Clip: see Fig 3.

4. EWT-3102/EWT-3103 Cover Plate: see Fig 4.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 1. Touchscreen Thermostat dimensions in in. (mm).

5.98 in.(152mm)

4.48in. (114mm)

1.235 in.(30.60mm)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 2. Touchscreen Thermostat Back Case dimensions in in. (mm).

1.51 in.(38.5mm) 0.84 in .(21.5mm)

1.77 in.(45mm)

1.67 in.(42.5mm)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 3. Outdoor Sensor Mounting Clip dimensions in in. (mm).

1.49 in.(38mm)

(

)

(

)

1.82 in.(46.3 mm)

1.10 in.(28.1mm)

0.62 in.(16mm)

1.56 in .(39.7mm)

0.08 in.(2mm)

0.44 in .(11.2mm)

0.24 in.(6.2mm)

(

)

(

)

(

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 4. Cover Plate dimensions in in. (mm).

3.29 in.(83.5mm)

0.85 in .(21.5mm)

3.29 in.(83.5mm)

5.35 in.(136mm)

4.13 in.(105mm)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

INSTALLATION When Installing

this

Product...

1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.

2. Check the ratings given in th e instructions to make sure the product is suitable for your application.

3. Installer must be a trained, experienced service technician.

4. After completing installation, use these instructions to check out the product operation.

Selecting Location

Install the thermostat about 5 ft. (1.5m) above the floor in an area with good air circulation a

average temperature. See Fig. 5.

Do not install the thermostat where it can be affected by:

----Drafts or dead spots behind doors and in corners.

----Hot or cold air from ducts.

----Radiant heat from sun or appliances. Concealed pipes and chimneys.

----Unheated (uncooled) areas such as an outside wall behind the thermostat.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 5. Selecting thermostat location.

5FEET

1.5METERS

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installing

Wallplate

CAUTION

Electrical Hazard. Can cause electrical shock or equipment damage. Disconnect power before wiring.

The thermostat can be mounted horizontally on the wall

1. Position and level the wallplate (for appearance only).

2. Use a pencil to mark the mounting holes.

3. Remove the wallplate from the wall and, if drywall, drill two holes in the wall, as marked.

For firmer material such as plaster, drill two holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.

4. Position the wallplate over the holes, pulling wires through the wiring opening. See Fig. 6

5. Insert the mounting screws into the holes and tighten.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 6. Mounting wallplate.

WALL

WIRES THROUGH WALL AND WIRE

SLOT

WALL ANCHORS

M0UNTING HOLES(2)

M0UNTING SCREWS(2)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

WIRING

(FIG. 9

21)

All wiring must comply with local electrical codes and ordinances.

1. Select set of terminal identifications (Table 1) that corresponds with system type (conventional or heat pump in Fig. 7).

2. Loosen the screws for the appropri ate system type selected; see Tabl e 1. See Table 2 for terminal designation descriptions. Insert wires in the terminal block under the loosened screw. See Fig. 8.

3. Securely tighten each screw.

4. Push excess wire back into the hole.

5. Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.

6. See Fig. 9 through 21 for typical wiring hookups.

Fig. 7. Selecting terminal identifications for system type.

CONVENTIONAL

HEAT PUMP

SCREW TERMINALS

S1 S2 C R RC E L Y2 Y G

S1 S2 C R RC W W2 Y2 Y G

O/B AUX

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 1. Selecting Terminal Identifications forSystem Type.

System Type

Wallplate Terminal

Identifications

Wiring Diagram

Reference

Standard Heat/Cool Conventional

9, 10

Heat Only Conventional

Heat Only with Fan Conventional

Heat Only (Series 20) Power to open and

power to close zone valves

Conventional

Normally Open Zone Valves Heat Only

Conventional

Cool Only Conventional

Standard Multistage up to 2 Heat/2 Cool Conventional

16, 17

Heat Pump with No Auxiliary Heat Heat Pump

18, 19

Heat Pump with Auxiliary Heat Heat Pump

20, 21

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

IMP

TANT: Use 18 gauge thermostat wires.

Fig. 8. Inserting wires in te

minal block.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 2. Terminal Designation Descriptions.

Terminal Designation Description

RC (see Note 1)

Power forcooling--connect to secondaryside ofcooling system

transforme

R (see Note 1)

Power forheating--connect to secondaryside of heating system

transforme

C (see Note 2) Common wire from secondary side of cooling system transformer

W Heat relay

Y Compressor contactor

G Fan relay

Y2 Second stage cooling

W2 Second stage heat relay

O/B (see Note 3) Changeover valve for heat pump systems

AUX Auxiliary heat relay for heat pump systems

E Emergency heat relay for heat pump systems

L (see note 4) Equipment monitor for heat pump systems

S1, S2 Optional outdoor or indoor remote sensor

NOTES:

1. When used in a single-transformer system, leave metal jumpe r wire in place between RC and R. If used on a two-transformer system, remove metal jumper wire between RC and R.

2. Common wire is optional when thermostat is used with batteries.

3. If thermostat is configured for a heat pump system in the Installer Setup, configure changeover valve

for cool (O-factory setting) or heat (B).

4. L terminal is an input (system monitor) when the System mode is in the Hea t, Off, Cool or Auto position. L terminal is a 24 VAC output when System mode is Emergency Heat. Must connect the 24 VAC Common when using the L terminal. See LCD indications on page 90.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 9. Typical hookup of conventional single-stage heat and cool system with single

transformer (1H/1C conventional).

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR TEMPERATURE SENSOR

COMPRESSOR CONTACTOR

OPTIONAL 24VAC COMMON

CONNECTION

FAN RELAY

HEAT RELAY

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1.POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2.OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 10. Typical hookup of conventional single-stage heat and cool system with two

transformers (1H/1C conventional).

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR TEMPERATURE SENSOR

FAN RELAY

HEAT RELAY

COMPRESSOR CONTACTOR

OPTIONAL 24VAC COMMON CONNECTION

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 11. Typical hookup ofheat-only system (1H conventional).

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR TEMPERATURE SENSOR

HEAT RELAY

OPTIONAL 24VAC COMMON CONNECTION

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 12. Typical hookup of heat only system with fan (1H conventional).

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR TEMPERATURE SENSOR

HEAT RELAY

OPTIONAL 24VAC COMMON CONNECTION

FAN RELAY

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 13. Typical hookup of heat only power to open and power to close zon e valve

(Series 20) system.

OUTDOOR/INDOOR TEMPERATURE SENSOR

SERIES 20 MOTOR OR VALVE

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 14. T ypic al hookup of hea t only syst em with normal ly open zone valves.

CONVENTIONAL

S1 S2 C R R C W W2 Y 2 Y G

OUTDOOR/INDOOR TEMPERATURE SEN S OR

NORMALLY OPEN

ZON E VAL V E

OPTIONAL 24VA C COM MON CONNECTION

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 15. Typical hookup of coolonly system (1C conventional).

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR

TEMPERATURE SENSOR

COMPRESSOR CONTACTOR

OPTIONAL 24VAC COMMON CONNECTION

FAN RELAY

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 16. Typical hookup of conventional multistage two-s tage heating and two-stage

cooling in a single-transformer system (2H/2C, 2H/1C or 1H/2C conventional).

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR TEMPERATURE SENSOR

OPTIONAL 24VAC COMMON

CONNECTION

MUST COME FROM THE COOLING

TRANSFORMER

FAN RELAY

HEAT RELAY 1

HEAT RELAY 2

COOL RELAY 2

COOL RELAY 1

CONVENTIONAL

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE

Fig. 17. Typical hookup of conventional multistage two-stage heating and two-stage

cooling in a two-transformer system (2H/2C, 2H/1C or1H/2C conventional).

CONVENTIONAL

S1 S2 C R RC W W2 Y2 Y G

OUTDOOR/INDOOR TEMPERATURE SENSOR

OPTIONAL 24VAC COMMON CONNECTION MUST COME FROM THE COOLING TRANSFORMER

FAN RELAY

HEAT RELAY 1

HEAT RELAY 2

COOL RELAY 2

COOL RELAY 1

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

4. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 18. Typical hookup of single-stage heat pump with no auxiliar

backup heat

(1H/1C heat pump).

HEAT PUMP

S1 S2 C R RC W W2 Y2 Y G

S1 S2 C R RC E

L Y2 Y G

O/B AUX

OUTDOOR/INDOOR

TEMPERATURE SENSOR

CHANGEOVER VALVE

COMPRESSOR RELAY

FAN RELAY

OPTIONAL 24VAC COMMON CONNECTION

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

3. MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USED AS A 24 VAC OUTPUT. SEE "HEAT PUMP LED" SECTION FOR MORE INFORMATION.

4. "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

5. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE.

Fig. 19. Typical hookup of multistage heat pump with no auxiliary/backup heat

(

2H/2C heat pump).

HEAT PUMP

S1 S2 C R R C W W2 Y 2 Y G

S1 S2 C R R C E

L Y2 Y G

O/B AUX

OUTDOOR/INDOOR TEMPERATURE SEN S OR

CHANGEOVER VALVE

FAN RELAY

OPTION A L 24VAC COMMON CONNECTION

COMPRESSOR 2

COMPRESSOR 1

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

2. FACTORY INSTALLED JUMPER.

OUTDOOR SENSOR REQUIRED IN SYSTEM WITH FOSSIL FUEL BACKUP HEAT THAT IS NOT USING AN EXTERNAL FOSSIL FUEL KIT.

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE

FROM THE THERMOSTAT CABLE.

MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USE

AS A 24 VAC OUTPUT.

SEE HEAT PUMP SECTION ON PAGE 90.

6. "O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

Fig. 20. Typical hookup ofsingle-stage heat pump with auxiliary/backup heat

(2H/1C heat pump).

HEAT PUMP

S1 S2 C R RC W W2 Y2 Y G

S1 S2 C R RC E L Y2 Y G

O/B AUX

OUTDOOR/INDOOR TEMPERATURE SENSOR

CHANGEOVER

VALVE

FAN RELAY

OPTIONAL 24VAC COMMON CONNECTION

COMPRESSOR

RELAY

EMERGENCY HEAT RELAY

HEAT 2 RELAY

(AUXILIARY HEAT)

EQUIPMENT MONITOR

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED

2. FACTORY INSTALLED JUMPER. 3．

OUTDOOR SENSOR REQUIRED IN SYSTEM WITH FOSSIL FUEL BACKUP HEAT THAT IS NOT USING AN EXTERNAL FOSSIL FUEL KIT

4．

OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTAT CABLE 5．

MUST CONNECT THE 24 VAC COMMON WHEN USING L. THE TERMINAL IS SHOWN AS EQUIPMENT MONITOR, CAN ALSO BE USE

AS A 24 VAC OUTPUT.

SEE HEAT PUMP SECTION ON PAGE 90

6．"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP.

Fig. 21. Typical hookup ofmultistage heat pump with auxilia

ry/

backup heat

(3H/2C heat pump).

HEAT PUMP

S1 S2 C R R C W W2 Y2 Y G

S1 S2 C R R C E L Y2 Y G

O/B AUX

OUTDOOR/INDOOR TEMPERATURE SEN SOR

CHANGEOVER VALVE

FAN RELAY

OPTIONAL 24VA C COMMON CONNECTION

EMERGENCY HEAT RELAY

HEAT 2 RELAY

(AUXILIARY HE A T)

EQUIPMENT MONITOR

COMPRESSOR 1

COMPRESSOR 2

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

POWER THE THERMOSTAT

You can choose from three methods to power the thermostat Batteries

· only (AA alkaline).

· 24 VAC common wire only.

· 24 VAC common wire with battery backup (AA alkaline).

Wiring 24

VAC Common

· Single-Transformer

System:

Conn

ect the common side of the transformer to the C screw terminal of the thermostat

wallplate. Leave the metal jumper wire in place between RC and R.

Two Transformer System:

Connect power side of "Cooli ng" transformer to RC terminal. Remove factor y installed

jumper. Connect common side of "COOLING" transformer to the compressor contactor, relay, etc. Connect power side of "HEATING" transformer to the R terminal. * Connect the common side of the Heat relay to the C terminal.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installing

Batteries

1. Install Two AA alkaline batteries on the back of the thermostat as marked on the thermostat. See Fig. 22.

Fig. 22. Installing batteries.

2. Locate and remove the tab. See Fig. 23.

Fig. 23. Removetab on thermostat back.

BATTERIES(2)

-+-+

REMOVE TAB

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Mount

Thermostat

Wallplate

1. Align the terminal screw blocks with the pins on the back of the thermostat. Push the thermos

at straight onto the wallplate until it snaps into place. See Fig 24.

Fig. 24. Mount thermostat to wallplate.

WALLPLATE

TERMINAL SCREW BLOCK

PINS ON BACK OF THERMOSTAT

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Locate and

Mount Outdoor

Temperature

Sensor (Optional)

Mount the sensor where (see Fig. 25):

·the settings cannot be tampered with.

·there is good air circulation.

·it can measure true outdoor ambient temperature.

·there is a flat surface.

·wire distance between sensor and thermostat should be 65.61 ft (20m).

Do not mount the sensor:

·in direct sunlight.

·where hot or cold air blows on the sensor. Discharge line from an outdoor compressor

unit, vent or fan causes inaccurate temperature readings.

·where snow, ice or debris can cover it. Use the following steps to mount the sensor:

1. Remove the sensor from the mounting clip.

2. Mark the area on the location selected for mounting the sensor mounting clip.

3. Mount the clip.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 25. Typical locations forOAS-1 OutdoorSensor.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

CAUTION

Electrical Interference (Noise) Hazard. Can cause erratic system operation.

Keep wiring at least one foot away from large inductive loads such as motors, line starters, lighting ballasts and large power distribution panels. Use shielded cable to reduce interference when rerouting is not possible.

IMP

TANT

Erratic temperature readings from a sensor can occur as a result of any of the wiring practices that are not to local and national electrical standards.. Avoid these practices to assure correct operation. Use shielded cable to reduce interference if rerouting sensor wiring is not possible.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Be sure wires have a cable separate from the thermostat cable. Do not route temperature sensor wiring with building power wiring, next to control

contactors or near light dimming circuits, electric motors or welding equipment. Avoid poor wiring connections. Avoid intermittent or missing building earth ground.

CAUTION

Electrical Shock Hazard. Can cause electrical shock or equipment damage.

Disconnect power supply before connecting wiring.

Wiring must comply with applicable codes, ordinances and regulations:

1. Wire Outdoor Sensor to S1and S2 terminals on the thermostat. If leadwire provided is not

long enough, you need an extra cable to reach the hole at location. a. Using color-coded, 18-gauge thermostat wire is recommended. For example of general wiring of sensor, see Fig. 26. b. Pigtail wiring can be used.

2. Mount Sensor in its mounting clip.

3. Plug wiring holes using non-hardening caulk or putty.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. USE APPROPRIATE MOUNTING MEANS FOR THE TYPE OF STRUCTURE.

2. PLUG WIRING HOLE WITH NON-HARDENING CAULK OR PUTTY .

Fig. 26. Wire Outdoor Sensor to the thermostat.

WIRING HOLE THROUGH STRUCTURE

OAS-01

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Locate and

Mount

Remote

Indoor

Temperature

Sensor (Optional)

1. Choose a location (see Fig. 27) for mounting the sensor on an inside wall about 5 ft (1.5m)

above the floor.

2. Be sure wire distance between sensor and thermostat is less than 65.61 ft（6m）.

3. Make sure there is g ood air circulation at average temperature at the chosen location.

void the following locations because they can introduce errors in senso r measurements. See Fig. 27. Hot areas caused by: (a) Concealed pipes or ducts. (b) Drafts from fireplaces or other heat sources. (c) Convection or radiant heat from the sun or electrical equipment. Cold areas caused by: (a) Concealed pipes or ducts. (b) Drafts from windows and doors. Unheated areas on the other side of the wall location. Dead air areas: (a) Behind doors, furniture and curtains. (b) In corners and alcoves.

4. Mark the area on the wall selected for mounting the Sensor or junction box.

5. Run wire cable to a hole at the selected wall location. Pull appro ximately three inches o

ire through the opening. Color-coded, 18-gauge thermostat wire is recommended.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 27. Typical location for Indoor Sensor.

5FEET

1.5METERS

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Wire

Indoor Sensor

CAUTION

Electrical Interference (Noise) Hazard. Can cau se erratic system operation.

Keep wiring at least one foot away from large inductive loads such as motors, line starters, lighting ballasts and large power distribution panels.

IMPORTANT

Erratic temperature readings from a sensor can occur as a result of any of the wiring practices described below. Avoid these practices to assure correct operation.

Be sure wires have a separate cable from the thermostat cable. Do not route temperature sensor wiring with building power wiring, next to control contactors or near light dimming circuits, electric motors or welding equipment. Avoid poor wiring connections. Avoid intermittent or missing building earth ground.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

CAUTION

Electrical Shock Hazard. Can cause electrical shock or equi pment damage.

Disconnect power supply before connecting wiring.

Wiring must comply with applicable codes, ordinances and regula tions .

1. Wire Indoor Sensor to S1 and S2 terminals on the thermostat. For an example of general wiring of IAS-1, see Fig. 28 to wire one se n sor and 29 to w ire multiple sensors.

2. Push excess wire back into the hole. Plug the hole using non-hardening caulk, putty o

insulation to prevent drafts from affecting performance.

3. Remove IAS-1 sensor cover.

4. Mount IAS-1 to the wall or junction box using the screws and anchors provided.

5. Level the IAS-1 for appearance only. Device functions correctly even when not level.

6. Install IAS-1 cover.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

2. IF MORE THAN ONE REMOTE SENSOR IS REQUIRED, REFER TO FIGURE 3

3. WIRES MUST HAVE A CABLE SEPARATE FROM THE THERMOSTA

CABLE.

Fig. 28. Wiring a single IndoorSensor.

Fig. 29. Wiring Multiple Sensors.

1. SENSORS MUST BE ARRANGED IN THIS CONFIGURATION TO OPERATE

CORRECTLY.

2. WIRES MUST HAVE A CABLE SEPARATE FROM THERMOSTAT CABLE

IAS-01

S1 S2 C R RC W W2 Y2 Y G

S1 S2 C R RC

IAS-01

S1 S2 C R RC

IAS-01

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

INSTALLER SETUP

Follow these steps to enter the Installer Setup:

1. Press and release the System Key.

2. Press the two blank keys on either side of the center blank key for approximately five seconds until screen changes.

Room

Set To

SYSTEM

TUE

COOL

DONE

CANCEL

OFF

HEAT

Room

Running As SCHED

Set To

SYSTEM

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

TUE

AUTO

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

3. Release the two blank keys when the screen on the thermostat matches the screen below.

4. See screen below to review how the thermostat keys are used during Installer Setup. See Tables 3-5 for the Installer Setup Numbers and Settings.

5. Press the Done key to exit the Installer Setup screen. 49

DONE

INSTALLER SETUP NUMBER

ADVANCE TO NEXT INSTALLER SETUP

CURRENT

SETTING

CHANGE THE CURRENT SETTING

PRESS TO EXIT INSTALLER SETUP

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installer Setup

Number

Installer Setup

Name

Settings Notes

0120

Date

(Year Upper)

Select first two digits of current calendar year (2005, etc).

It cannot be changed.

0130

Date

(Year Lower)

Select last two digits of current calendar year (05 for year 2005, etc).

2001 - 2099 available.

0140 Date (Month)

Select number that represents current calendar month.

0150 Date (Day)

Select number that represents current calendar date.

0160 Schedule Options

0-nonprogrammable. 4-7-day programmable.

When it is changed, the Schedule needs to be reprogrammed).

0170 System Type Selection

1-1 heat/1 cool conventional (factory setting). 2-single-stage heat pump (no auxiliary heat). 3-heat only conventional (no fan) Also for 750mV. 4-heat only conventional (with fan). 5-heat only (power to open and power to close zone valves or normally-open zone valves). 6-cool only conventional. 7-2 heat/1 cool heat pump (with auxiliary heat). 8-2 heat/2 cool multistage conventional. 9-2 heat/1 cool multistage conventional. 10-1 heat/2 cool multistage conventional. 11-2 heat/2cool heat pump (no auxiliary heat). 12-3 heat/2cool heat pump (with auxiliary heat).

Available options and defaults vary by thermostat. System selection automatically modifies some default settings and/or hides other Installer Setup options.

Table 3.Installer Setup Menu.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installer Setup

Number

Installer Setup

Name

Settings Notes

0180 Fan Control in Heating

0-gas or oil furnace equipment controls fan in heating (factory setting). 1-electric furnace thermostat controls fan in heating.

Only shown if conventional system is selected. If heat pump is chosen, fan defaults to electric.

0190

Changeover Valve O/B

Terminal Energized in

Heating or Cooling

(Heat Pumps Only)

0-changeover valve O/B terminal setting. 1-changeover valve O/B terminal is energized in heating.

Only shown if heat pump system is chosen.

0200

Backup Heat Source

(Auxiliary Heat)

0-heat pump backup heat source is electric (factory setting). 1-heat pump backup heat source is fossil fuel.

Only shown if 2 heat/1 cool or 3 heat/2 cool heat pump is chosen.

0210

External Fuel Fossil

Fuel Kit

0-no external fossil fuel kit is controlling heat pump backup heat. This thermostat controls the dual fuel. Must install outdoor sensor and set Installer Setup Number 0340 to number 2. 1-external fossil fuel kit is controlling heat pump backup heat.

Only shown if fossil fuel is chosen as backup heat source.

0220

Cycles per hour (cph)

for 1st Stage

Compressor

3-cph recommended for compressors (factory setting).

1, 2, 4, 5, 6-other cycle rate settings.

0230

Cycles per hour (cph)

for 2nd Stage

Compressor

3-cph recommended for compressors (factory setting). 1, 2, 4, 5, 6other cycle rate settings.

Only shown if two stages of cool are selected.

Table 3.Installer Setup Menu. (CONTINUES)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 3.Installer Setup Menu. (CONTINUES)

Installer Setup

Number

Installer Setup

Name

Settings Notes

0240

Cycles per hour (cph) for

1st Stage Conventional

Heat

1-1 cph used for steam and gravity. 3-3 cph used for hot water system and high efficiency (90% or better) furnaces. 5-5 cph used for standard fossil fuel forced air (less than 80% efficient) systems (factory setting) 9-9 cph used for electric furnaces. 2, 4, 6, 7, 8, 10, 11, 12other cycle rate settings.

Not shown if system selection is heat pump. Selection in this stage changes default cph for 2nd stage heat.

0250

Cycles per hour (cph) for

2nd Stage Heat (Aux

Heat for 2H/1C Heat

Pumps)

1-1 cph used for steam and gravity. 3-3 cph for hot water systems and high efficiency (90% or better) furnaces. 5-5 cph for standard fossil fuel forced air (less than 90% efficient) systems (factory setting). 9-9 cph used for electric furnaces or electric auxiliary heat for heat pump systems. 2, 4, 6, 7, 8, 10, 11, 12other cycle rate settings.

Only shown if two stages of heat are selected.

0260

Cycles per hour (cph) for 3rd Stage Heat Aux Heat for 3H/2C Heat Pumps)

Only shown if 3H/2C heat pump is selected.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 3.Installer Setup Menu. (CONTINUES)

Installer Setup

Number

Installer Setup

Name

Settings Notes

0270

Cycles per hour (cph)

for Emer

3-3 cph for hot water systems and high efficiency (90% or better) furnaces. 5-5 cph for standard fossil fuel forced air (less than 90% efficient or better) systems.

9-9 cph for electric strip heat for heat pumps.

Only shown if 2H/1C or 3H/2C heat pump is selected.

0280 Backlight

0-Backlight function disable. 1-Backlight function enable.

0300 Changeover

0-manual changeover (factory setting). 1-auto changeover.

0310 Deadband

Heating and cooling set-points can be set no closer than chosen value: 2-2°F (1.5°C) 3-3°F (2°C) 4-4°F (2.5°C) 5-5°F (3°C) 6-6°F (3.5°C) 7-7°F (4°C) 8-8°F (4.5°C) 9-9°F (5°C)

Shown only if automatic changeover is selected.

0320

Temperature Indication

Scale

0-fahrenheit temperature display (factory setting). 1-celsius temperature display.

When it is changed, the schedule need to be reprogrammed.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 3.Installer Setup Menu. (CONTINUES)

Installer Setup

Number

Installer Setup

Name

Settings Notes

0330 Daylight Savings

1-daylight savings is on (factory setting). 0-daylight savings is off.

Set to 0 in areas that do not follow daylight savings.

0340

Remote Temperature

Sensor (Outdoor or

Indoor)

0-no remote temperature sensor. 1-outdoor temperature sensor for display only. 2-outdoor temperature sensor for control. Outdoor sensor used for Heat Pump Lockout settings. (See Heat Pump Temperature Lockout section for more details.). 3-indoor temperature sensor.

Defaults and Options depend on System Type selection. Indoor Temperature Sensor uses an averaging network and does not include on-board sensor.

0350

Heat Pump

Compressor Lockout

or (Balance Point)

0-no compressor lockout. 15°F (-9.5°C) 20°F (-6.5°C) 25°F (-4°C) 30°F (-1°C) 35°F (1.5°C) 40°F (4.5°C) 45°F (7°C)

Default depends on other selections. Shown if control is selected. (See section for more information.)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 3.Installer Setup Menu. (CONTINUES)

Installer Setup

Number

Installer Setup

Name

Settings Notes

0360

Heat Pump Auxiliary

Lockout

0-no auxiliary heat lockout. 40°F (4.5°C) 45°F (7°C) 50°F (10°C) 55°F (13°C) 60°F (15.5°C)

Shown if electric is chosen for backup heat source and outdoor temperature sensor for control is selected. (See Advanced Features section for more information.)

0380

Indoor

Dehumidification

Control

0-No indoor dehumidification control. 1-Dehumidification control activated.

Available on select models. If dehumidification control is activated and autochangeover is selected in Installer Setup Number 0300, the deadband minimum is defaulted to 5°F (3°C) in Number 0310.

0500

Filter Change

Reminder

0-furnace filter reminder off. 1-10 run time days. 2-30 run time days. 3-60 run time days. 4-90 run time days. 5-120 run time days. 6-365 run time days.

Run time based on call for fan.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installer Setup

Number

Installer Setup

Name

Settings Notes

0510

Humidifier Pad

Replacement Reminder

0-humidifier pad replacement reminder off. 1-90 calendar days. 2-180 calendar days. 3-365 calendar days.

0520

UV Lamp Replacement

Reminder

0-UV lamp replacement reminder off. 1-365 calendar days.

0530

Adaptive Intelligent

Recovery

1-Adaptive Intelligent Recovery control is activated (system starts early so set-point is reached by start of program period).

0-Conventional Recovery (system starts recovery at programmed time).

0540 Number of Periods

2-two periods available (Wake and Sleep) 4-four periods available (Wake, Leave, Return and Sleep).

Not shown if non- programmable is selected. 2 or 4 applies to all days of the week. (When it is changed, the schedule needs to be reprogrammed).

0580

Minimum Compressor

Off Time

5-five-minute compressor off-time setting ( factory setting). 0, 2, 3, 4-other compressor off-time settings.

0600

Heat Temperature

Range Stop

40-90-temperature range (1°F increments) of heating set-point.

Shown in 1/2 °C.

0610

Cool Temperature

Range Stop

50-99-temperature range (1°F increments) of cooling set-point.

Shown in 1/2 °C.

0640 Clock Format

12-12 hour clock (factory setting). 24-24 hour clock.

Table 3.Installer Setup Menu. (CONTINUES)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 3.Installer Setup Menu. (CONTINUES)

Installer Setup

Number

Installer Setup

Name

Settings Notes

0650

Extended Fan On Time

Heat

0-no extended fan operation after call for heat ends. 90-fan operation is extended 90 seconds after call for heat ends.

Not shown if fan operation is set to fossil fuel or in Cool Only Systems.

0660

Extended Fan On Time

Cool

0-no extended fan operation after call for cool ends. 90-fan operation is extended 90 seconds after call for cool ends.

Not shown in Heat Only Systems.

0670 Keypad Lockout

0-unlocked keypad. 1-partially locked keypad. 2-fully locked keypad.

Unlocked all functions are available. Partially locked only. Temperature up and down keys and ability to enter and modify Installer Setup mode are available. Fully locked only ability to enter and modify-Installer Setup mode are available.

0680

Temperature Control in

Heat

1-less aggressive temperature control (could cause temperature undershoot). 2-Standard temperature control in heating (factory setting). 3-more aggressive temperature control (could cause temperature overshoot).

Applies to recovery ramp and use of auxiliary heat during recovery. Choose 1 if getting temperature overshoot. Choose 3 if getting temperature undershoot.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installer Setup

Number

Installer Setup

Name

Settings Notes

0690

Temperature Control in

Cool

1-less aggressive temperature control (could cause temperature undershoot). 2-Standard temperature control in cooling (factory setting).

3-more aggressive temperature control (could cause temperature overshoot).

Applies to recovery ramp. Choose 1 if getting temperature overshoot. Choose 3 if getting temperature undershoot.

0700

Temperature Display

Offset

-3°F (-1.5°C)

-2°F (-1°C)

-1°F (-.5°C) 0°F (0. °C) (no difference in displayed temperature and actual room temperature ) 1°F (.5°C) 2°F (1°C 3°F (1.5°C)

0710 Reset Thermostat

0-no thermostat reset. 1-resets all Installer Setup Options to default values and resets schedule to default setting.

Only calendar settings and time are retained.

Table 3.Installer Setup Menu. (CONTINUES)

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

INSTALLER SYSTEM TEST

Use the Installer System Test to test the W1 W2 E AUX Y1 Y2 and L terminals.

CAUTION

Equipment Damage Hazard. Minimum compressor off time is bypassed during Installer System Test. Avoid cycling compressor quickly.

How

Use

the

Installer

System Test

The Installer Test is part of the Installer Setup Menu.

1. Enter the Installer System Test by entering the Installer Setup.

2. Note that the test appears at the end of the Installer Setup Numbers.

3. See Fig. 30 to review how the thermostat buttons are used during the Installer System

Test. See Table 6 for avai lable Installer System Tests.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Fig. 30. Review thermostat buttons used during InstallerSystem Test.

DONE

DOWN ARROW

TURNS THE SYSTER OFF

DONE KEY

EXITS INSTALLER SYSTEM TEST

UP ARROW

TURNS THE SYSTER ON

SYSTEM STAUS NUMBER

SYSTEM TEST NUMBER

UP ARROW KEY

ADVANCES TO NEXT SYSTEM TEST NUMBER

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Installer

System Tests

Table 4. Installer System Test.

System Test Number Test Type

System Status Number and

Description

Test 1 Cooling System Test

1-Cool stage 1 and stage 2 turn on.

0-Cool is off.

Test 2 Fan System Test

1-Fan turns on. 0-Fan turns off.

Test 3 Heating System Test

1-Heat stage 1 and stage 2 (aux

heat) turn on.

0-Heat is off.

Test 4 Emergency Heat Test

1-Emergency heat and L turn on. 0-Emergency heat and L turns off.

Press the Next button to go to the beginning of the Installer Setup or press the Done button to exit the Installer System Test.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

OPERATION

Thermostat Keys

Thermostat Display

FAN

SHOWS FAN SETTING

Room

Set To

SYSTEM

COOL

MORE SCHED HOLD CLOCK

SCREEN

AUTO

FAN

TUE

SHOWS CURRENT DAY OF THE WEEK

SYSTEM

SHOWS CURRENT SYSTEM POSITION

RUNNING AS SCHED

SHOWS THE THERMOSTAT IS FOLLOWING THE PROGRAMMED SCHEDULE

TIME

DISPLAY CURRENT TIME OF DAY. HOLD TIME REMAINING OR NUMBER OF VACATION DAYS REMAINING

INSIDE TEMPERATURE

SHOWS THE CURRENT INSIDE TEMPERATURE

SET TO TEMPERATURE

SHOWS THE CURRENT SET TEMPERATURE

Running As SCHED

Room

Running As SCHED

Set To

SYSTEM

COOL

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

TUE

FAN

SELECTS ON/AUTO/CIRC

UP ARROW

RAISES TEMPERATURE SETTING

SHOWS ADDITIONAL

ACCESSORY AND MAINTENANCE OPTIONS

HOLD

SETS A PERMANENT HOLD AND ACTIVITIES VACATION HOLD

SYSTEM

SELECTS EM. HEAT/OFF/COOL

AUTO/EMER

SCREEN

LOCKS OUT THE SCREEN TO ALLOW FOR CLEANING

CLOCK

SETS THE TIME FORWARD OR BACK

SCHED

ENTERS SCHEDULING MODE

DOWN ARROW

LOWERS

TEMPERATURE

SETTING

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

System and Fan

Settings

System

The System key selections vary based on your heating and/or cooling system type.

Heat Thermostat controls the heating system. Off Both heating and cooling systems are off. Cool Thermostat controls the cooling system. Auto Thermostat automatically changes between heating and cooling operation,

depending on indoor temperature.

Emer Emergency heat cycles to maintain temperature. Compressor is locked out (used

only for 2H/1C or 3H/2C heat pump systems) and auxiliary heat turns on as second stage if needed.

Fan

The Fan key selections vary based on the heating and/or cooling system type.

On Fan runs continuously. Use this setting for improved air circulation or for more efficient

central air cleaning.

Auto Fan follows the fan program schedule. Circ Fan runs randomly approximately 35% of the time when there is no call for cooling or

heating. Use this setting for improved air circulation or for more efficient central air cleaning when you do not want the fan running continuously.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

User Setup

Follow these steps to enter the Use

Setup: 1．Press and release the System key.

2．Press the center blank key for approximately five seconds until the screen changes.

Room

Running As SCHED

Set To

SYSTEM

MORE SCHED HOLD CL OCK

SCREEN

AUTO

FAN

TUE

AUTO

Room

Set To

SYSTEM

COOL

TUE

HEAT

OFF

CANCEL

DONE

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

3．Release the center blank key when the screen on the thermostat matches the screen below.

4．See the screen below to review how the thermostat keys are used during the User Setup. See Table 5 for the User Setup numbers and settings.

5．Press the Done key to exit the User Setup screen.

DONE

INSTALLER SETUP NUMBER

ADVANCE TO NEXT INSTALLER SETUP

CURRENT SETTING

CHANGE THE CURRENT

SETTING

PRESS TO EXIT INSTALLER SETUP

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

User Setup

Number

User Setup

Name

Settings

0120

Date

(Year Upper)

It cannot be changed.

0130

Date

(Year Lower)

Select last two digits of current calendar year (05 for year 2005, etc).

0140 Date (Month) Select number of current calendar month (1-12). 0150 Date (Day) Select number of current calendar date (1-31).

0160 Schedule Options

0-Non-programmable. 4-7-day programmable (factory setting)(when it is changed, the schedule needs to be reprogrammed).

0320

Display temperature

in °F or °C

0-°F setting (factory setting). 1-°C setting.

0330 Daylight savings time

1-Daylight saving function is enable 0-Daylight saving function is disable

0500 Furnace air filter

0-off (factory setting). 1-10 fan run time days (about one month). 2-30 fan run time days (about three months). 3-60 fan run time days (about six months). 4-90 fan run time days (about nine months). 5-120 fan run time days (about one year). 6-365 fan run time days (about three years).

0510

Humidifier pad

reminder

0-off. 1-3 months. 2-6 months. 3-12 months.

Table 5. User Setup Settings.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 5. User Setup Settings. (CONTINUES)

User Setup

Number

User Setup

Name

Settings

0520 UV lamp reminder

0-off (factory setting). 1-1 year.

0540

Number of schedule

periods available

2-two (Wake and Sleep). 4-four (Wake, Leave, Return, Sleep) factory setting.

0640 Clock format

12-12-hour clock (factory setting).

24-24-hour clock.

0670 Screen lockout

0-all keys available; screen is unlocked (factory setting). 1-screen is partially locked. All key functions locked except Temperature Up and Down keys and Cancel key. 2-screen is fully locked

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

PROGRAMMING

Preprogrammed

Energy Star Settings

Table 6 shows default program settings. Visit the Energy St ar web site at www.energystar.gov

for additional education and resources on pro grammable thermostats.

Table 6. Energy Star Default Program Settings.

Schedule Period Time

Setpoints

Fan Setting

Heat Cool

Wake 6:00AM 68°F (20°C) 78°F (26°C) Auto

Day 8:00AM 60°F (16°C) 85°F (29°C) Auto

Evening 4:00PM 68°F (20°C) 78°F (26°C) Auto

Sleep 10:00PM 60°F (16°C) 82°F (28°C) Auto

Program

Heating

and

Cooling

Schedule

Your thermostat can control up to four different schedule periods per day:

Wake

Period when you awaken and want your home at a comfortable temperature.

Day

Period when you are away from home and want an energy-saving temperature.

Evening-Period when you return home and want your home back to a comfortable

temperature.

Sleep

Period when you are asleep and want an energy-saving temperature.

NOTE: Schedule times are in 15-minute intervals.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Edit

Schedule

1. Press Sched key.

2. Press PROG DAY keyto review the programs to see that the settings are compatible with your lifestyle.

MON TUE WED THU FRI

HEAT

CANCEL

SLEEP WAKE DAY

EVENING

DONE

AUTO

FAN

CANCEL PERIOD

COOL

EDIT

AUTO PROG

MON TUE WED THU FRI

HEAT

CANCEL

SLEEP WAKE DAY

EVENING

DONE

AUTO

FAN

CANCEL

PERIOD

COOL

EDIT

AUTO

PROG

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

3. Press the edit then you press PROG DAY key to select the program days

6. Another approach to programming is to first program all weekdays Mon through Fir and Sat and Sun as same programs.

4. Press Wake key. Once pressed, Wake flashes to show it is selected. Same as the other schedule

5. Press Up and Down keys to modify time and heat and cool temperatures from this screen.

NOTE: The Fan setting can be programmed

for On, Auto, or Circ for each period selected. See Fan Schedule section for more information.

MON TUE WED THU FRI

CANCEL

SLEEP WAKE DAY

EVENING

DONE

MON TUE WED THU FRI

HEAT

CANCEL

SLEEP WAKE DAY

EVENING

DONE

AUTO

FAN

CANCEL PERIOD

COOL

EDIT

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

7. To exit schedule without saving changes,

press Cancel key any time.

Cancel a Schedule

Period

1. Press Sched key.

2. Press Edit key .

3. Select the Day(s) of the week desired.

4. Press schedule period you want to cancel (Wake, Leave, Return or Sleep). Once selected, the period flashes.

5. Press Cancel Period key.

NOTE: To set a Program Schedule for the

remaining days of the week, repeat

steps 1-9. Example: If Mon – Fri Was selected first, go back and Repeat steps 1- 6 for Sat and Sun.

6. The time, temperature(s) and fan setting disappear. The bar above the selected period is removed, indicating the scheduled period was cancelled. NOTE: To reinstate a schedule period, press

arrow keys to set desired time and temperatures.

MON TUE WED THU FRI

HEAT

CANCEL

SLEEP WAKE DAY

EVENING

DONE

AUTO

FAN

CANCEL PERIOD

COOL

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

7. Press Done key.

Fan runs continuously (programmable

for all schedule periods).

Circ

Fan runs randomly for approximately 35% of schedule period when there is no call for cooling or heating (programmable fo

all scheduled periods).

Fan Schedule

Press Fan key while in the Scheduling Screen to program the System Fan. Choices available from the Scheduling Screen:

Auto (default position) Fan runs with

equipment. Programmable for all schedule periods (Wake, Leave, Return and Sleep).

MON TUE WED THU FRI

HEAT

CANCEL

SLEEP

WAKE DAY

EVENING

DONE

AUTO

FAN

CANCEL

PERIOD

COOL

MON TUE WED THU FRI

HEAT

CANCEL

SLEEP WAKE DAY

EVENING

DONE

AUTO

FAN

CANCEL PERIOD

COOL

EDIT

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Manual Override of Fan Schedule

Use Fan key to change fan work states by manual.

Auto

-fa

n is automatically following the Fan

schedule (choices are Auto, On or Circulate).

- Fan runs randomly for approximately 35% of schedule period when there is no call for cooling or heating.

Circ- Fan circulates randomly for

approximately 35% of time. When the program reaches to next schedule, the fan will run as the setting in the period.

Operate EWT-3102/EWT-3103 Touchscreen

Set

Time

1. Press Clock.

2. Use arrows to set current

CANCEL

DONE

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

4. Press Done key.

IMPORTANT

The current day of the week should already be set correctly. If not, see Installer Setup to set the day.

Set

Temperature Overrides

The thermostat has three temperature override options: Override Temperature Until, Permanent Override and Vacation Hold.

Override Until (TEMPORARY Override)

Holds temperature temporarily until the next scheduled period time or until the time the user sets.

1. Press Up or Down arrow next to the

temperature you want to adjust. Hold Temperature Until time appears on the screen. The Hold Temperature Until time defaults to the start time of the next scheduled period.

2. Press Up or Down arrow next to the Time

key to set desired time for the thermostat to resume.

3. Press the Cancel or SCHED key to cancel

Override

Temperature Until and resume

schedule.

Room

Set To

SYSTEM

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

TUE

HEAT

CANCEL

Override Until

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

VACATION HOLD

Change temperature setting for a designated number of days.

1．Press the Up and Down arrow keys to set the desired temperature while away on vacation.

Notice that —Hold Temperature Until time is shown on the screen. (This is the time the Vacation Hold override expires after the number of day’s ends.)

2．Press Hold key twice. Screen shows - Hold Temperature Until one day. 3．Press Up and Down arrow keys to change the number of Days you desire thermostat to

override the schedule. NOTE: Days Up and Down arrows appear for approximately seven seconds. Pressing just

below Hold Temperature Until on the screen allows the Days Up and Down arrows to reappear.

4. To cancel the Vacation Hold override

early, press the Cancel key.

NOTE: When the number of days of

Vacation Hold expires, the screen shows Following Schedule to indicate that Vacation Hold has ended.

Room

Set To

SYSTEM

SCHED CLOCK

SCREEN

AUTO

FAN

TUE

HEAT

Override Until

DAYS

CANCEL

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Clean Thermostat Screen

The thermostat has a touch screen interaction. Follow these steps to clean the screen

ithout making thermostat changes:

1. Press the Screen key. Thermostat locks out all touch keys for 30 seconds to allow for cleaning.

CLEAN SCREEN

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

2. Use damp cloth slightly moistened with

ater or household glass cleaner to clean

the screen.

3. Repeat the above steps, as necessary.

IMPORTANT

Do not spray any type of liquid directly on the thermostat itself. If using household glass cleaner, Spray cleaner on cloth. Then use a cloth to clean the thermostat screen.

4. Press the Done key to return to the Home Screen and normal operation.

Replace Batteries

1. When the Battery indicator is flashing, replace the batteries promptly with two fresh AA alkaline batteries.

2. Remove thermostat from the wallplate by pulling straight out.

3. Remove the old batteries and insert two fresh AA alkaline batteries, as marked on the thermostat.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

4. Align the screw blocks with the pins on the back of the thermostat.

5. Push the thermostat straight onto the wallplate until it snaps into place.

BATTERIES(2)

-+-+

WALLPLATE

TERMINAL SCREW BLOCK

PINS ON BACK OF THERMOSTAT

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Battery

Tips

1. Replace the batteries as soon as “Batt” flashes in the display. The Battery indicator flashes in the display one month before the batteries run down completely.

2. Always use fresh AA alkaline batteries. Non-alkaline batteries do not last as long and can leak, causing thermostat damage.

3. Although the thermostat has a Low Battery indicator, replace the batteries once a year to prevent the thermostat and heating/cooling system from shutting down due to lack of battery power.

Screen Locks

Partially Locked Screen

When partially locked, the screen indicates Screen Locked for 5 to 7 seconds whenever the user attempts to press a key that is locked. Pressing a locked key, while Screen Locked is shown, flashes “

Screen

cked” on the screen. In this mode, all keys are locked except the Temperature Up and Down arrow keys:

User can change temperature up or down but cannot change schedule settings. Temporary temperature change lasts until next scheduled period and that time shows on screen. To cancel temperature override and begin following schedule, press Cancel key. To unlock screen, see Installer Setup section.

Fully Locked Screen

In this mode, all keys are locked and not functional. To unlock screen, see Installer Setup section. The screen continuously displays Screen Locked.

TUE

Room

Set To

SYSTEM

HEAT

MORE SCHED CLOCK

SCREEN

AUTO

FAN

SCREEN LOCKED

HOLD

Running As SCHED

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Outdoor

Temperature

If an outdoor temperature sensor is installed, the thermostat displays the outside temperature in the lower right corner of the Home Screen.

If thermostat is set to Auto Changeover System mode, press the More key until the outside temperature is shown on the screen.

CANCEL

DONE

Outside

TUE

Room

Running As SCHED

Set To

SYSTEM

HEAT

MORE SCHED HOLD CLOCK

SCREEN

AUTO

FAN

Outside

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Remote

Indoor

Temperature

If a remote indoor temperature sensor is installed, the thermostat displays the inside temperature on the screen from the remote sensor(s).The thermostat internal temperature sensor is not used.

ONE REMOTE INDOOR SENSOR INSTALLED (OPTIONAL)

If one remote indoor temperature sensor is used, the screen showing the Inside temperature reading shows the temperature at the indoor remote sensor location. The thermostat internal temperature sensor is not used.

MULTIPLE REMOTE INDOOR SENSORS INSTALLED (OPTIONAL)

If more than one remote indoor sensor is used, the screen showing inside temperature reading shows the average of all the remote indoor sensors. The thermostat internal temperature sensor is not used.

Room

Set To

SYSTEM

SCHED

HOLD CLOCK

SCREEN

AUTO

FAN

TUE

HEAT

Heat On

Running As SCHED

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Indoor Air

Quality

Reminders

Filter Change Reminder

The filter change reminder must be turned on from the Installer Setup. Once expired, the screen flashes,

Chan

ilter

and a Reset key appear. Press the

Reset key to reset the change reminder.

NOTE: The days are counted as fan run time, so anytime the fan is running, the reminder is counting that time against the number of days selected.

The remaining run time days can be viewed by pressing the More key; the remaining days can be edited using the More key o

from the Installer Setup. To view or reset the reminder before it expires; follow these steps using the More key:

1. Press the More key until the filter reminder appears on the screen. This is the number of fan run-time days remaining on the filter reminder.

CANCEL

DONE

DAYS

FILTER

RESET

EDIT

Room

Set To

SYSTEM

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

TUE

HEAT

RESET

Override Until

RENEW FILTER

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

2. Press the Edit key.

3. Use the Up and Down keys to change the number of run-time days.

4. Press the Done key to go back to the viewing screen.

CANCEL

DONE

DAYS

FILTER

RESET

EDIT

CANCEL

DONE

DAYS

FILTER

RESET

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

5. Press the Reset key to activate the new number of days selected in the previous screen.

6. Press the Done key to return to the Home Screen.

CANCEL

DONE

DAYS

FILTER

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Humidifier Pad Reminder

The Humidifier Pad change reminder must be turned on from the Installer Setup. Once expired, the screen flashes,

Cha

nge Humidifie

Pad and a Reset key appears. Press the Reset key to reset the change reminder. The remaining calendar days can be viewed by pressing the more key. The remaining days can be edited using the More key or from the Installer Setup. To view or reset the reminder before it expires; follow these steps using the More key:

1. Press the More key until the Humidifier Pad change reminder appears on the screen. This is the number of calendar days remaining on the Humidifier Pad reminder.

2. Press the Edit key.

3. Use the Up and Down keys to change the number of calendar days.

4. Press the Done key to go back to the viewing screen.

5. Press the Reset key to activate the new number of days selected in the previous screen

6. Press the Done key to return to the Home Screen.

UV Lamp Reminder

The UV Lamp change reminder must be turned on from the Installer Setup. Once expired, the screen flashes, Change UV Lamp and a Reset key appear. Press the Reset key to reset the change reminder.

1. Press the More key until the UV Lamp change reminder appears on the screen. This is the number of calendar days remaining on the UV Lamp reminder.

2. Press the Edit key.

3. Use the Up and Down keys to change the number of calendar days.

4. Press the Done key to go back to the viewing screen.

5. Press the Reset key to activate the new number of days selected in the previous screen.

6. Press the Done key to return to the Home Screen.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Temperature Recove

The thermostat feature, Adaptive Intelligent Recovery,

eliminates all guesswork when setting the thermostat schedule. Simply set the program schedule to the time that the comfort temperature is desired. The thermostat then turns on the heating or cooling at just the right time to have the home reach the scheduled temperature at the scheduled time. For example get up at 6:00 AM and want the temperature to be 70°F. Set the Wake period for 6:00 AM and 70°F. The thermostat then turns on the heat before 6:00 AM to raise the temperature to 70°F by 6:00 AM. The thermostat alerts that the heating or cooling system is coming on before a scheduled time by showing Recovery on the screen.

NOTE: It takes about a week for the thermostat to adjust to local weather, the schedule, the construction of the home and the heating and/or cooling system. Each day it adjusts the next day’s recovery start time accordingly.

Room

Set To

SYSTEM

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

TUE

Recovery

HEAT

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Minimum Off-Timer

The Thermostat has built-in compressor protection (minimum- off timer) that prevents the compressor from restarting too early after

a shutdown. The minimum-off timer is activated after the compressor turns off. If there is a call during the minimum-off timer, the thermostat shows

wait

in the display.

When the minimum-off timer expi res,

Cool

On or

eat

Ona appears solidly in the

display and the compressor and fan turn on.

Heat Pumps only

Room

Running As SCHED

Set To

SYSTEM

COOL

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

WED

Wait

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Inside Humidity Level

Select models can sense the humidity level in the home. The humidity level in the home is shown in the lower right corner of the Home Screen.

If thermostat is set to Auto Changeover System mode, press the more key until the humidity level is shown on the screen.

THU

Room

Running As SCHED

Set To

SYSTEM

COOL

MORE SCHED HOLD CLOCK

SCREEN

AUTO

FAN

Humidity

CANCEL

DONE

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Control Dehumidification Setting (Select Models)

Select models read the inside humidity level and allow for a dehumidification setting:

1. Press the More key until the inside humidity percent and dehumidification set-point are shown.

2. Use Up and Down arrow keys, located to the right of the dehumidifier set-point, to set desired humidity level dehumidification in the summer.

3. Press Done key.

Dehumidification

Droop

Control

The dehumidification control attempts to control to the user's humidity set-point by turning on the air conditioner. In extremely high humidity conditions, the thermostat keeps the air conditioner running (energizing Y and G) for up to 3°F below the temperature set-point. It does this while trying to achieve the desired humidity set-point and balancing that with the temperature set-point. The thermostat controls up to 3° F below the temperature setting until either the humidity is satisfied or conditions change.

Humidity

CANCEL

DONE

DEHUMIDIFICATION

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Special Heat Pump Operat

ion

Heat Pump Indication

(Requires

VAC Common

Connections)

“E5” indication is located in the screen of the thermostat. It is only visible when lighted. When the L terminal is wired to an equipment monitor, this is operational in the Heat, Off, Cool or Auto positions. See Fig. 31.

Fig. 31. L terminal switch to R ( power)

side of system transformer.

Heat Pump Emergency

Heat

LCD Indication (Requires 24 VAC Common

Connection)

The thermostat indicates “E5” indicator when the thermostat is in the Emergency Heat mode. The “E5” is located in the LCD screen of the thermostat. It is visible only when on. When the thermostat is in the Emer system mode, the L terminal is continuously energized and the “E5” is displayed.

Heat Pump Temperature Lockouts

Dual Fuel Heat Pump and Outdoor Temperature Sensor

In this operation, there is no external fossil fuel kit (dual fuel kit) installed; the thermostat controls this function.

TUE

Set To

SYSTEM

HEAT

SCHED CLOCK

SCREEN

AUTO

FAN

HOLD

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

1. Choose correct heat pump application in Installer Setup Number 0170.

2. Choose

Fossil Fuel Option as the

backup heat source in Installer Setup Number 0200.

3. Choose

No External Fossil Fuel Kit

Option

is control- ling back up heat in

Installer Setup Number 0210.

4. Choose Outdoor Temperature Sensor

for Heat Pump Temperature Lockouts Option

in Installer Setup N umber 0340.

5. Choose appropriate Balance Point

Temperature

in Installer Setup Number

0350.

OPERATION IN HEAT MODE ABOVE BALANCE POINT (OUTDOOR TEMPERATURE)

When the outdoor temperature is above the selected Balance Point Temperature (ISU 0350), only the compressor operates and the fan (G terminal) energizes when the thermostat calls for heat. See Fig. 32.

BALANCE POINT

OUTDOOR TEMPERATURE

COMPRESSOR ONLY

FOSSIL FUEL ONLY

Fig. 32. Dual FuelHeat Pump Operatio

in Heat mode with

OPERATION IN HEAT MODE BELOW BALANCE POINT (OUTDOOR TEMPERATURE)

When the outdoor temperature is below the selected Balance Point Temperature (ISU 0350), only the Fossil Fuel (auxiliary heat) operates and the fan (G terminal) does not energize when the thermostat calls for heat.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

OPERATION IN EMERGENCY HEAT MODE

The balance point (outside) temperature is not used in the Emergency heat mode. When the thermostat is moved to the Emergency Heat position, the compressor is locked out. The first stage of heat is whatever is connected to the E terminal. The second stage of heat is what is connected to the Aux. terminal. Often there is only one source of non-compressor heat and the E terminal is jumped to the Aux. terminal.

Heat Pump with Electric Auxiliary (Backup) Heat and Outdoor Temperature Sensor

1. Choose correct heat pump application in Installer Setup Number 0170.

2. Choose Electric as

Auxiliary (Backup)

Heat Source

in Installer Setup Number

0200.

3. Choose

Outdoor Temperature Sensor

for Control Option

in Installer Setup

Number 0340.

4. Choose

Compressor Lockout

Temperature

in Installer Setup Number

0350.

5. Choose

Auxiliary Lockout

Temperature

in Installer Setup Number

0360. NOTE: There is a 5°F deadband between the Compressor and Auxiliary Heat Lockout.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Operation in Heat Mode

When the outdoor temperature is below the Compressor Lockout Temperature, only the Auxiliar y He a t ope r at es. When the outdoor temperature is above the Auxiliary Lockout Temperature, only the Compressor operates. See Fig. 33.

AUXILIARY LOCKOUT TEMPERATURE

COMPRESSOR LOCKOUT TEMPERATURE

OUTDOOR

TEMPERATURE

BOTH

COMPRESSOR AND

AUXILIARY

HEAT

UXILIARY

ONLY

COMPRESSOR

Fig. 33. Heat Pump Operation with Lockout

Temperatures Set.

When the outdoor temperature is between the two temperatures, both the Compressor and Auxiliary Heat operate.

Operation in Emergency Heat Mode

Once the thermostat is placed into the Emergency Heat mode, the compressor and auxiliary lockout features are turned off. In the Emergency heat mode, the compressor is locked out. The first stage of heat is whatever is connected to the E terminal. The second stage of heat is connected to the Aux. terminal. Usually the emergency and auxiliary heat sources are electric strip heat in these cases.

Operating Sequence

The thermostat energizes specific terminal(s), depending on the demand for heating, cooling or fan. The thermostat screen shows the time, inside temperature, system and fan selections. Additional indicators are shown when the heating, cooling or fan is energized. See Tables 9 11 for specification information.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 7. Sequence of Operation forConventional Systems.

System Setting Fan Setting Call for Action Energize Terminals Screen Message

Off Auto None None None

Cool Auto None None None

Cool or Auto Auto Stage 1 Cooling Y, G Cool On Cool or Auto Auto

Stage 1 and Stage 2

Cooling

Y, Y2b, G Cool On

Heat Auto None None None

Heat or Auto Auto Stage 1 Heating W, Ga Heat On Heat or Auto Auto

Stage 1 and Stage 2

Heating

W, W2c, Ga Heat On

G energizes only if Installer Setup number 0180 is set to Electric.

If Installer Setup System type is set to two stages of cooling.

If Installer Setup System type is set to two stages of heating.

Table 8. Sequence of Operation for Power Open and Power Closed Valves or Normally Op

Valves.

System Setting Fan Setting Call for Action Energize Terminals Screen Message

Off Auto None None None Heat N/A None Y None Heat N/A Heat W Heat On

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 9. Sequence of Operation for Heat Pump Systems.

System Setting Fan Setting Call for Action Energize Terminals Screen Message

Off Auto None O/Ba None

Cool Auto None O/Ba None

Cool or Auto Auto Stage 1 Cooling Y, G, O/Ba Cool On Cool or Auto Auto

Stage 1 and Stage 2

Cooling

Y, Y2

, G, O/Ba

Cool On

Heat Auto None O/Ba None

Heat or Auto Auto Stage 1 Heating Y, G, O/Ba Heat On

Heat or Auto Auto

Stage 1 and Stage 2

Heating

Y, AUX

, G, O/Ba Aux Heat On

Heat or Auto Auto Stage 1, 2 and 3 Heating

Y, Y2

, AUXe, G,

O/B

Aux Heat On

Em. Heat Auto None

L ,O/Ba

None Em. Heat Auto Stage 1 Heating E, G, L, O/Ba Heat On Em. Heat Auto

Stage 1 and Stage 2

Heating

E, AUX, G, L, O/B

Aux. Heat On

Configure O/B in Installer Setup. Based on last piece of equipment called (cooling = O or

heating = B).

If Installer Setup System Type is set to 2Heat/1Cool Heat Pump with Auxiliary Heat.

If Installer Setup System Type is set to 3Heat/2Cool Heat Pump with Auxiliary Heat.

This terminal does not energize if Installer Setup System type is set to 2 Heat/2 Cool Heat

Pump with no Auxiliary Heat.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Outdoor

Temperature

Sensor

Operation

When installed with The rmostat Installer Setup Number 0340 set to 1 or 2, the outside temperature can be displayed on the thermostat. See Fig. 34.

Fig. 34. Outside temperature reading on

EWT-3102/EWT-3103 Thermostat.

The Outdoor Sensor converts outdoor ambient temperature to a resistance that the thermostat can interpret. The sensor has a negative temperature coefficient (NTC), which means that resistance decreases as the temperature increases.

Checkout

With an accurate thermometer (±1°F [0.5°C]) measure the temperature at the sensor location, allowing time for the thermometer to stabilize before reading.

Calibration

The Outdoor Sensor is calibrated at the factory and cannot be recalibrated in the field.

TUE

Room

Set To

SYSTEM

HEAT

SCHED CLOCK

SCREEN

AUTO

FAN

Outside

HOLD

Running As SCHED

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

emote

Ind

oor

emperature

Sensor

Operation

When installed with Thermostat Instal ler Setup Number 0340 set to 3, the remote inside temperature is displayed on the Thermostat Home Screen as Inside Temperature. The thermostat internal temperature sensor is not used. See Fig.

35.

Fig. 35. Inside temperature reading on

EWT-3102/EWT-3103

The Wall Mount Temperature Sensor converts room temperature to a resistance that the thermostat can interpret. The sensor has a negative temperature coefficient (NTC), which means that resistance decreases as the temperature increases. The sensor can be used to provide one remote sensor input (see Fig. 28) or as a temperature averaging network with multiple Sensors connected, as shown in Fig. 29.

Checkout

For best results, allow Wall Mount T emperature Sensor to absorb the air moving through the room for a minimum of twenty minutes before taking a resistance measurement. With an accurate thermometer (±1°F [0.5°C]) measure the temperature at the sensor location, allowing time for the thermometer to stabilize before reading.

Calibration

The Wall Mount Temperature Sensor is calibrated at the factory and cannot be recalibrated in the field.

TUE

Room

Running As SCHED

Set To

SYSTEM

HEAT

SCHED HOLD CLOCK

SCREEN

AUTO

FAN

Heat On

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

TROUBLESHOOTING

(TABLE 10)

Table 10. Troubleshooting.

Symptom Possible Cause Action

Display does not come on. Thermostat is not being powered.

Check for 24 VAC between C and RC. Check that AA batteries are installed correctly and are good.

Temperature settings do not change.

The upper or lower temperature limits

were reached.

Check temperature set-points. Check Installer Setup Numbers 0600 and 0610; modify as needed.

The keypad is fully locked.

Check Installer Setup Number 0670 to change keypad locked options.

Heating or cooling does not come on.

Thermostat minimum off-time is

activated.

Wait up to five minutes for the system to respond.

System selection is not set to Heat or

Cool.

Set system Selection to correct position.

System type Selection is incorrect.

Check Installer Setup Number 0170 and make sure correct System type is chosen.

Thermostat is calling for Heat (Heat on)

or Cool (Cool on) but no heating or

cooling is running.

Heating or cooling equipment is not

operating.

Check wiring. Check Installer Setup Number 0170 and make sure correct system type is chosen. Verify operation of equipment in System Test mode.

EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat

Table 10. Troubleshooting. (CONTINUED)

Symptom Possible Cause Action

Heat does not turn on (Heat On is solid in

the display).

Heating equipment failure.

Check for 24 VAC at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the heating equipment to find the cause of the problem. Check for 24 VAC between the heat terminal (W) and transformer common. If 24 VAC is present, the thermostat is functional. Check the heating equipment to find the cause of the problem.

Loose or broken wire connection between thermostat and heating

equipment.

Check for 24 VAC between the heat terminal (W) and transformer common. If voltage is not present, check wire connection (loose or broken) between the thermostat and the heating equipment.

Cooling does not turn on (Cool

On is solid in the display)

Cooling equipment failure.

Check for 24 VAC at the equipment on the secondary side of the transformer between power and common. If voltage is not present, check the cooling equipment to find the cause of the problem. Check for 24 VAC between the cool terminal (Y) and transformer common. If 24 VAC is present, the thermostat is functional. Check the cooling equipment to find the cause of the problem.

EWC Controls EWT-3102, EWT-3103 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual