EWC Controls EWT-725 User manual

EWT-725
Installation Manual
Power Type
Battery Power
Hardwire (Common Wire)
Hardwire (Common Wire) with
Battery Backup
A trained, experienced
technician must install this
product.
Carefully read these
instructions. You could damage
this product or cause a
hazardous condition if you fail to
follow these instructions.
Una version en español de este
manual se puede descargar en
la pagina web de la compañia.
Rev. 1841
U.S. Registered Trademark. Patents pending
Copyright 2018 All Rights Reserved.
Installation Tips
Installation Tips
Thermostat Application Guide
Table of Contents
Installation Tips
Thermostat Quick Reference
Wiring
Wiring Diagrams
Features & About The Badge
Technician Setup
Programming Thermostat
Page
2-3
4-5
6
7
8
13-16
Subbase Installation
The thermostat should be installed approximately 4 to 5 feet above the
oor. Select an area with average temperature and good air circulation.
• Close to hot or cold air ducts
• That are in direct sunlight
• With an outside wall behind
the thermostat
• In areas that do not require
conditioning
• Where there are dead spots
or drafts
(in corners or behind doors)
• Where there might be
concealed chimneys or
pipes
Wall Locations
Vertical Mount
Horizontal Mount
For vertical mount put one screw on the top
and one screw on the bottom.
For horizontal mount put one screw on the
left and one screw on the right.
All of our products are mercury free.
However, if the product you are
replacing contains mercury, dispose of
it properly. Your local waste
management authority can give you
instructions on recycling and proper
disposal.
Pick an installation location that is easy for
the user to access. The temperature of the
location should be representative of the
building.
Installation Tip
Mercury Notice
Do not install
thermostat in locations:
Failure to disconnect the power before
beginning to install this product can
cause electrical shock or equipment
damage.
Installation Tip:
Electrical Hazard
Mount Thermostat
Align the 4 tabs on the subbase with
corresponding slots on the back of the
thermostat, then push gently until the
thermostat snaps in place.
Battery Installation
Battery installation is recommended even if thermostat is hardwired
(C terminal connected). When thermostat is hardwired and batteries
are installed, the thermostat will activate a compressor delay of 5
minutes when the thermostat detects a power outage from the
hardwired power supply.
Important:
High quality alkaline batteries are recommended.
Rechargeable batteries or low quality batteries
do not guarantee a 1-year life span.
Insert 2 AA
Alkaline batteries
(included). High
quality alkaline
batteries are
recommended.
Simple
operating
instructions
are found
on the back
of the
battery
door.
Getting to know your thermostat
Glow in the dark light button
Fan Switch
System Switch
Easy change battery door
Temperature Setpoint Buttons
LCD Display
Thermostat Quick Reference
Specications
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)
Swing (cycle rate or dierential) ...... 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 4.4”H x 0.8”D
9 -12
Description
Gas or Oil Heat
Electric Furnace
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (With Aux. or Emergency Heat)
Multi-Stage Systems
Heat Only Systems
Heat Only Systems - Floor or Wall Furnace
Cool Only Systems
Millivolt Conventional Systems
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Two Transformer Systems No
FAN
ON AUTO EmHCOOL
OFF HEAT
FAN
ON AUTO EmHCOOL
OFF HEAT

Thermostat Quick Reference Wiring
Tech Settings Tech Settings
This thermostat has a technician setup menu for easy installer
conguration. To setup the thermostat for your particular application:
Swing Setting Tip
Temperature swing, sometimes called dierential or cycle rate, can be customized
for this individual application. For most applications choose a swing setting that is
as long as possible without making the occupants uncomfortable.
Technician Setup Menu
LCD Will Show
The compressor short cycle delay
protects the compressor from
short cycling.This feature will not
allow the compressor to be turned
on for 5 minutes after it was last
turned o.
Selecting “ON”will not allow
the compressor to be turned on
for 5 minutes after the last time
the compressor was switched
o. Select“OFF”to remove this
delay.
0
This feature allows the installer
to change the calibration of the
room temperature display. For
example, if the thermostat reads
70˚ degrees and you would like it
to read 72˚ then select +2.
Room
Temperature
Calibration
You can adjust the room
temperature display to read
4˚above or below the factory
calibrated reading.
Tech Settings Adjustment Options
Compressor
Short Cycle
Delay
Default
0N
Cd
0.8
The swing setting often called
“cycle rate”,“dierential”or“
anticipation”is adjustable. A
smaller swing setting will cause
more frequent cycles and a larger
swing setting will cause fewer
cycles.
Cooling
Swing
The cooling swing setting is
adjustable from 0.2˚ to 2˚. For
example: A swing setting of
0.5˚ will turn the cooling on at
approximately 0.5˚ above the
setpoint and turn the cooling
o at approximately 0.5˚ below
the setpoint.
0FF
This feature will ash “FILT”in the
display after the elapsed run time
to remind the user to change the
lter. A setting of“OFF”will disable
this feature.
Filter Change
Reminder
You can adjust the lter change
reminder from OFF to 2000
hours of runtime in 50 hour
increments.Tap the second
button from the top left side of
the thermostat to display the
current lter elapsed runtime.
F1
Next Step
Prev Step
100 SE
0
Next Step
Prev Step
CAL
Next Step
Prev Step
Next Step
Prev Step
Use the or keys to change settings and the NEXT STEP or
PREV STEP key to move from one step to another. Note: Only press
the DONE key when you want to exit the Technician Setup options.
1. Press the MENU button
2. Press and hold TECH SET button for 3 seconds. This 3 second
delay is designed so that homeowners do not accidentally access
the installer settings.
3. Congure the installer options as desired using the table below.
Tech Settings Adjustment Options Default
The swing setting often called“cycle
rate”, “dierential”or“anticipation”
is adjustable. A smaller swing
setting will cause more frequent
cycles and a larger swing setting
will cause fewer cycles.
The heating swing setting is
adjustable from 0.2˚ to 2˚. For
example: A swing setting of
0.5˚ will turn the heating on at
approximately 0.5˚ below the
setpoint and turn the heating
o at approximately 0.5˚ above
the setpoint.
Heating
Swing 0.8
Next Step
Prev Step
This feature allows you to set a
minimum cool setpoint value. The
setpoint temperature cannot be
lowered below this value.
Cooling
Setpoint
Limit 44
Use the and key to
select the minimum cool
setpoint.
This feature allows you to set a
maximum heat setpoint value. The
setpoint temperature cannot be
raised above this value.
Heating
Setpoint
Limit 90
Use the and key to
select the maximum heat
setpoint.
Next Step
Prev Step
Next Step
Prev Step
CO L
Select F for Fahenheit temperature
read out or select C for Celsius
read out.
F for Fahrenheit
C for Celsius
F or C F
F
FC
You can select either a 12 or 24 hour
clock setting.
12 or 24
Hour Clock 12
Use the and to select 12
or 24 hour clock.
Next Step
Prev Step
Next Step
Prev Step
HE L
dFHE
LCD Will Show
The low battery indicator is displayed when the AA battery power is low. If the user
fails to replace the battery within 21 days, the screen will only show the low battery
indicator but maintain all functionality. If the user fails to replace the batteries after
an additional 21 days (days 22-42 since rst “low battery” display) the setpoints will
change to 55˚F (Heating) and 85˚F (Cooling). If the user adjusts the setpoint away from
either of these, it will hold for 4 hours then return to either 55˚F or 85˚F. After day 63
the batteries must be replaced immediately to avoid freezing or overheating because
the thermostat will shut the unit o until the batteries are changed.
Important
Indicates the current room temperature
Time and day of the week
Setpoint: Displays the user selectable setpoint temperature.
Hold is displayed when the thermostat program is permanently overridden.
System Operation Indicators:
The COOL ON, HEAT ON or icon will display when the COOL, HEAT, or (fan) is on.
Note: The Compressor delay feature is active if these are ashing.
Low Battery Indicator: Replace batteries when this indicator is shown.
Button Options
Program Time Periods: This thermostat has 4 programmable time periods
per day.
Getting to know your thermostat
Hold
LOW
COOL ON
EmHEAT ON
Sun Mon Tue Wed Thu Fri Sat
Temperature
Tech Set
Next Step
Set Time
Run Sched
Set Sched
Hold
Prev Step
Menu
Done LEAVE SLEEP
RETURN WAKE Stage 1 & 2
Stages: Indicates the stages of heat that are active.
Caution:
Electrical Hazard
All components of the
control system and the
thermostat installation must
conform to Class II circuits
per the NEC Code.
Warning:
Do not overtighten terminal
block screws, as this can
damage the terminal block.
A damaged terminal block
can keep the thermostat
from tting 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 the terminal block
screws. Insert wires then
retighten terminal block screws.
Place nonammable insulation
into wall opening to prevent
drafts.
1.
2.
3.
Terminal Designations
R
Failure to disconnect the power
before beginning to install this
product can cause electrical
shock or equipment damage.
C
B
O
G
W/E
W2
Y
Heat Pump System
1 HEAT 1 COOL / 2 HEAT 1 COOL
Conventional System
1 HEAT 1 COOL / 2 HEAT 1 COOL
Transformer Power
Transformer Common
Changeover Valve
Energized in HEAT
Fan Relay
First Stage of Emergency HEAT
Changeover Valve
Energized in COOL
Second Stage of HEAT/
EMERGENCY HEAT
First Stage of HEAT and COOL
Transformer Power
Transformer Common
Fan Relay
First Stage of HEAT
Second Stage of HEAT
First Stage of COOL
Energized in HEAT
Energized in COOL
1
2
3
7
8
13
2
7
8

Wiring Diagrams
Tech Settings
Power supply
Use either O or B terminals for changeover valve.
Optional 24 VAC common connection when thermostat is used in battery power mode.
Factory-supplied jumper
R
Y
C
G
W2
O
B
COMPRESSOR
RELAY
FAN RELAY
AUXILIARY
COOL CHANGE
OVER VALVE
HEAT CHANGE
OVER VALVE
C
R
L2
L1(HOT)
2H/1C Heat Pump System - Factory Default Setting
Typical 2H/1C Heat Pump System with separate emergency heat
R
Y
C
G
W2
COMPRESSOR
RELAY
EMERGENCY
RELAY
AUXILIARY
COOL CHANGE
OVER VALVE
HEAT CHANGE
OVER VALVE
O
B
C
R
L2
L1(HOT)
FAN RELAY
Note: In many systems
with no emergency heat
relay a jumper can be
used between E and W2.
Conventional System 1H/1C, 2H/1C (Heat pump set to“OFF”in tech settings)
Note: This
thermostat is only
compatible with
ONE transformer
systems.
R
Y
C
G
W2
COMPRESSOR
RELAY
HEAT RELAY
FAN RELAY
HEAT RELAY 2
C
R
L2
L1(HOT)
Features & Private Label Badge
Temporary and Permanent Hold Feature
When cool or heat is turned on, the thermostat will display HOLD
and RUN SCHED on the left of your screen when you press the
or button.
Temporary Hold: At this time if you do nothing, the temperature will
remain at this setpoint temporarily until next time period.
Permanent Hold: If you press the HOLD key on the left of your
screen, you will see HOLD appear below 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 Running Schedule: Press the RUN SCHED button on
the left of your screen to exit either temporary or permanent hold.
Filter Change Reminder
If your installing contractor has congured the thermostat to remind
you when the air lter needs to be changed, you will see FILT in the
display when your air lter needs to be changed.
Resetting the lter change reminder: When FILT reminder is
displayed, you should change your air lter and reset the reminder
by holding down the second button from the top left side of the
thermostat for 3 seconds.
(If using programming)
Gently slide a screwdriver into the bottom edge of the
badge. Gently turn the screwdriver counter clockwise. The
badge is held on by a magnet in the well of the battery door.
The badge should pry o easily. DO NOT USE FORCE.
About The Badge
All of our thermostats use the same universal magnetic badge. Visit the
company website to learn more about our free private label program.
Magnet in door
Use the bevel on lower ridge
This feature will start heating and
cooling early to bring the building
temperature to its programmed
setpoint by the begining of the
WAKE or RETURN time period.
Pro
Recovery ON
You can congure this thermostat
to have 7 Day, 5+1+1 program-
ming or non programmable.
Program
Options 5d
Use the and key to se-
lect 7d for 7 Day, 5d for 5+1+1,
or 0d for non programmable.
Next Step
Prev Step
Next Step
Prev Step
Use the and key to turn
ON or OFF.
Tech Settings Adjustment Options Default
LCD Will Show
This feature allows the thermostat to
keep multiple stages of heat
energized until setpoint is satised.
Use the or key to turn
ON or OFF.
Satisfy
Setpoint OFF
This feature allows a delay to occur
when a second stage is needed.
This allows the previous stage extra
time to satisfy setpoint.
Use the or key to
select OFF, 5, 10, 15, 30, 45, 60,
or 90 minutes.
Staging
Delay OFF
Next Step
Prev Step
Next Step
Prev Step
Select GAS for systems that
control the fan during a call for
heat. Select ELEC to have the
thermostat control the fan during a
call for heat.
EL - Electric for thermostat
control
GS- Gas for system control
Fan
Operation EL
When set to ON this thermostat
will operate a heat pump system
(default). If set to OFF this
thermostat will operate a
conventional system, and the next
tech step will not appear.
ON - Congured to operate heat
pump system.
OFF - Congured to operate
conventional system
See page 6 for terminal
designations.
Heat Pump ON
For Dual Fuel applications (Gas/
Fossil fuel Auxiliary Heat), turn this
setting ON to LOCKOUT the Heat
Pump (Y) when Auxiliary Heat (W2)
is on. If desired-This can also be used
with Electric Auxiliary.
OFF Will allow Y(1st stage of Heat)
and W2 (Aux Heat) to run together
if called for.
ON Will de-energize Y terminal
45 seconds after a call for Auxiliary
Heat (W2).
Dual Fuel
Auxiliary
for Heat
Pump
Will only
appear if
Heat pump
setting is
turned ON.
OFF
This feature controls the number of
stages in Emergency Heat mode. It
only appears if the Technician Setup
Step for HEAT PUMP is ON.
Use the or key to select
1-stage or 2-stage operation.
Emergency
Heat
Stages 1
Tech Settings Adjustment Options Default
LCD Will Show
Tech Settings
Next Step
Prev Step
Next Step
Prev Step
Next Step
Prev Step
Next Step
Prev Step
W/E
W/E
W/E

ProgrammingProgramming
Programming Programming
Set Time
1. With system switch set to OFF, press the MENU button
2. Press SET TIME
3. Day of the week will be ashing. Use the or key
to select the current day of the week.
4. Press NEXT STEP
5. The current hour is ashing. Use the or key to
select the current hour. When using 12-hour time, make sure
the correct a.m. or p.m. choice is selected.
6. Press NEXT STEP
7. Minutes are now ashing. Use the or key to
select current minutes.
8. Press DONE when completed.
(If using programming) Programming
All of our programmable thermostats are shipped with an
energy saving pre-program. You can customize this default
program by following the steps on page 15.
There are four time periods for each program (WAKE, LEAVE,
RETURN, SLEEP).
Set Program Schedule 5+1+1 or 7 Day (Continue... )
Set Program Schedule 5+1+1 or 7 Day
You can also use these time saving functions. You must be in Set
Sched Programming Mode (Press Menu >> Press Set Sched)
for the following functions to work:
If using 7-Day Programming use previous steps for
every individual day.
1) To copy ALL time periods and temperatures of current system and
day to ALL days, Press and Hold 2nd button down on left until the
Days and Time ash.
2) To copy ALL time periods (only times) for ALL days to the opposite
system (Heat to Cool / Cool to Heat), Press and hold the Glow in the
Dark Light button down until Set Time and Time ash.
1. Select HEAT or COOL with the system switch. Note: You
have to program heat and cool each seperately.
2. Press the MENU button (If menu does not appear rst press RUN SCHED)
3. Press SET SCHED. Note: Monday-Friday or (Monday if in 7 Day)
is displayed and the WAKE icon is shown. You are now
programming the wake time period for that day.
4. Time is ashing. Use the or key to make your
time selection for that day’s WAKE time period.
5. Press NEXT STEP
6. The setpoint temperature is ashing. Use the or
key to make your setpoint selection for that day’s WAKE
time period.
7. Press NEXT STEP
8. Repeat steps 4 thru 7 for that day’s LEAVE time period,
RETURN time period, and SLEEP time period.
To customize your program schedule, follow these steps:
Repeat steps 4 through 7 for the Saturday WAKE time period, LEAVE time
period, RETURN time period, and for the Saturday SLEEP time period.
Saturday:
Repeat steps 4 through 7 for the Sunday WAKE time period, LEAVE time
period, RETURN time period, and for the Sunday SLEEP time period.
Sunday: