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Specifications

The display range of temperature ... 41˚F to 95˚F (5˚C to 35˚C)

The control range of temperature.... 44˚F to 90˚F (7˚C to 32˚C)

Load Rating............................................... 1 amp per terminal, 1.5 amp 

                                                                      maximum all terminals combined

Swing (cycle rate or differential) ...... Heating is adjustable from 0.2˚ to 2.0˚

                                                                             Cooling is adjustable from 0.2˚ to 2.0˚

Power source ...........................................18 to 30 VAC, NEC Class II, 50/60 Hz 

                                                                      for hardwire

                                                                      Battery power from 2 AA Alkaline 

                                                                      batteries

Operating ambient ............................... 32˚F to +105˚F (0˚C to +41˚C)

Operating humidity .............................. 90% non-condensing maximum

Dimensions of thermostat ................. 4.7” W x 4.3” H x 1.1” D

Frequency ................................................ 916 MHz

Base module

Load rating ............................................... 1 amp per terminal, 1.5 amp 

                                                                       maximum all terminals combined

Power source ........................................... 18 to 30 VAC, NEC class II, 50/60 Hz

Operating ambient ............................... 32°F to +150°F (0° to +65°C)

Operating humidity .............................. 90% non-condensing maximum

Specifications

Features

Programming

1. 

 Select 

HEAT 

or

 COOL 

with the 

SYSTEM

 key. 

      

Note: 

You have to program heat and cool each separately. 

2.

  Press the 

MENU

 button (If menu does not appear first, press 

      

RUN SCHED

).

3.

  Press 

SET SCHED

.  

Note:

 Monday is displayed and the

      

WAKE/OCC1

 icon is shown. You are now programming the 

      

WAKE/OCC1

 time period for that day.

4.

  Use the           or           key to make your time 

      selection for that day’s 

WAKE/OCC1

 time period.  

     

 Note:

 If you want the fan to run continuously during this time

      period, select 

ON

 with the 

FAN 

key. 

5.

  Then use the           or         key to make your setpoint selection for

      that day’s 

WAKE/OCC1

 period.

6.

  Press 

Next Step.

7.

  Repeat steps 4 through 6 for 

that day’s

 

LEAVE/UNOCC1

     

 time period, for 

that day’s

 

RETURN/OCC2 

time period, 

      and for 

that day’s

 

SLEEP/UNOCC2

 time period.

To customize your 7 day Program schedule, follow these steps:
Monday:

Repeat steps 4 through 6 for the remaining days of the week.

A Note About Auto Changeover:

In Auto you have the ability to switch between Auto Heat or Auto Cool 

by pressing the system key. This can be done once the current mode has 

reached its setpoint. For example: if in Auto Heat, the heat setpoint must 

be satisfied before the thermostat will allow you to switch to Auto Cool. 

You can switch out of Auto by holding down the 

SYSTEM

 key. To get 

back into Auto, you must toggle the system key to Auto.

Temporary Hold: 

The thermostat will display 

HOLD

 and 

Run Sched-

ule 

on the bottom of the screen when you press the         or         

key. If you do nothing, the temperature will remain at this setpoint 

temporarily for 4 hours. The program setpoint will then replace the 

temporary setpoint.

Permanent Hold:

 With a temporary hold set, If you press the 

HOLD

 

key at the bottom of your screen, you will see 

HOLD

 appear next to 

the setpoint temperature in the display. The thermostat will now 

permanently stay at this setpoint and can be adjusted using the  

         or         keys.

To Return To Program: 

Press the 

Run Schedule

 key at the bottom of 

the screen to exit temporary and permanent holds.

Temporary & Permanent Hold Feature

Filter Change Reminder

If your installing contractor has configured the thermostat to re-

mind you when the air filter needs changed, you will seea reminder 

in the display when your air filter needs changed. the reminder will 

be shown in the display after your system has run long enough to 

require an air filter change.

Resetting the filter change reminder:  When

 

the reminder is 

displayed, you should change your air filter and reset the reminder by 

holding down the “

Clean

” key on the left side of the thermostat for 3 

seconds. 

Summary of Contents for EWT-955WH

Page 1: ...lation Tips 19 28 29 11 9 10 The thermostat and base module contain selectable wireless communication options Each component has a jumper switch label FSK and ASK Default setting FSK All components must be set to the same position for wireless communication Both modes utilize a 916 MHz frequency FSK frequency shift keying is the recommended mode ASK amplitude shift keying should be selected when u...

Page 2: ...ical Mount Horizontal Mount For horizontal mount put one screw on the left and one screw on the right For vertical mount put one screw on the top and one screw on the bottom To connect the base module to the master thermostat refer to the directions on page 13 of this manual Note Wire the base module s subbase the same way you would wire a hardwired thermostat subase Wiring Note The base module mu...

Page 3: ...ation Tips Do not install the base module in locations That are behind a chimney Where temperature could exceed 150 F Where rain or snow or extreme hot or cold is possible Note This base module is NOT weatherproof Wireless Communication Tips Follow these steps for a simple wireless communication setup Locate all components in area near equipment Wire base module with 8ft pigtail and temporarily mo...

Page 4: ...terminal block can keep the thermostat from fitting on the subbase correctly or cause system operation issues Installation Tip Max Torque 6in lbs Wiring If you are replacing a thermostat make note of the terminal connections on the thermostat that is being replaced In some cases the wiring connections will not be color coded For example the green wire may not be connected to the G terminal Loosen ...

Page 5: ... compressor run time to OFF 3 4 or 5 minutes If 3 4 or 5 is selected the compressor will run for at least the selected time before turning off Minimum Compressor OnTime OFF You can adjust the room temperature display to read up to 4 above or below the factory calibrated reading Adjustment Options Default LCDWillShow OFF 0 OFF This thermostat has a technician setup menu for easy installer configura...

Page 6: ...tup Steps Adjustment Options Default LCDWillShow You can configure the thermostat to operate a 3 stage heat pump system 2H 2C 2 heat 2 cool 3H 2C 3 heat 2 cool This feature is shown only if the HEAT PUMP technician setup step is ON Stages of Heat Use the or key to change between 2 or 3 stages of heat 2 heat will useY1 as first stage andW2 as auxiliary 3 heat will useY1 as the first stage Y2 as the...

Page 7: ...SOR FINDING SENSOR Disable the sensor on the master At least one indoor remote sensor must be connected to disable the local sensor LocalTemp Sensor YES enables local sensor NO disables local sensor YES YES LOCAL TEMP SENSOR Turns on the heat for 10 minutes each hour if unable to communi cate with the master thermostat if there has been a call for heat in the last 24 hours Freeze Protection YES en...

Page 8: ...hen completed Humidity Key Target humidity setpoint keys Note The target humidity setpoint is not programmable Unlike temperature humidity does not change quickly and should not be programmed Note Humidity is only energized during heat Dehumidity is only energized during cool Heat and cool each have their own target setpoints Ambient Humidity Display Ambient humidity will flash opposite the day an...

Page 9: ...u are now programming the OCCUPIED time period for that day 4 Use the or key to make your time selection for the OCCUPIED time period Note If you want the fan to run continu ously during this time period select ON with the FAN key 5 Then use the or key to make your setpoint selection for that day s OCCUPIED period 6 Press NEXT 7 Repeat steps 4 through 6 for that day s UNOCCUPIED time period Monday...

Page 10: ...o customize your 7 day Program schedule follow these steps Monday Repeat steps 4 through 6 for the remaining days of the week A Note About Auto Changeover In Auto you have the ability to switch between Auto Heat or Auto Cool by pressing the system key This can be done once the current mode has reached its setpoint For example if in Auto Heat the heat setpoint must be satisfied before the thermosta...

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