EWC Controls EWT-955WH Installation Manual page 6

Technician Setup
Tech Setup Steps
This feature allows you to set a
Heating
maximum heating setpoint limit.
Temperature
The setpoint temperature cannot
Setpoint
be raised above this value.
Limit
This feature allows you to set a
Cooling
minimum cooling setpoint limit.
Temperature
The setpoint temperature cannot
Setpoint
be lowered below this value.
Limit
This feature allows you to display
temperatures in either Fahrenheit
˚F or ˚C or Celsius.
You can select either a 12 or 24
12 or 24
hour clock setting.
Hour Clock
This feature will start heating
early to bring the building
Morning
temperature to its programmed
Recovery
setpoint by the beginning of the
WAKE, OCCUPIED time period.
You can configure this thermostat
Program
to have a 7 day program, a
5+1+1 program or as
Options
nonprogrammable.
You can configure this thermostat
to have 2 or 4 programmable time
periods per day. 4 time periods
are Wake, Leave, Return & Sleep.
Time Periods
2C time periods are Occupied
& Unoccupied. 4C time periods
are Occupied 1, Unoccupied 1,
Occupied 2, & Unoccupied 2.
Technician Setup
Tech Setup Steps
You can configure the thermostat
to operate a 3 stage heat pump
system.
Stages of
2H 2C = 2 heat, 2 cool
3H 2C = 3 heat, 2 cool
Heat
This feature is shown only if the
HEAT PUMP technician setup
step is ON.
Requires Outdoor Sensor
An outdoor temperature
Balance Point
ABOVE this setting will LOCKOUT
Temp the auxilary heat terminal (W2),
and ONLY ALLOW the heat pump/
compressor terminals (Y's) to
Only shows if Heat
energize.
Pump is turned
ON and Remote
An outdoor temperature
Sensor is set to 2.
BELOW this setting can perform
2 different ways, depending on
Requires
the previous
Gas Aux/Dual
Outdoor Sensor
Fuel setting.
1. If Gas Aux/Dual Fuel is set OFF
(Default-typical Electric Aux
setting) This will allow both heat
pump (Y's) and auxiliary heat
(W2) to run together.
2. If Gas Aux/Dual Fuel is set ON
(typical Gas Auxilary/Dual Fuel
setting) This will LOCKOUT the
heat pump (Y's) and ONLY ALLOW
the auxiliary heat (W2) to
energize
Balance point run time will allow
the W2 auxiliary terminal to
energize even if outdoor
temperature is above the selected
Balance
balance point temperature.
Point Run
If enabled, auxiliary will energize
Time
for the current cycle after the
balance point run time has
expired.
LCD Will Show Adjustment Options
Use the or key to
90
select the maximum heat
setpoint.
HE
Use the or key to
44
select the minimum cool
setpoint.
CO
˚F for Fahrenheit
˚C for Celsius
O
74
F
Use the or key to
12H
select 12 or 24 hour clock.
Use the or key to
turn on or off.
Use the or key to
5d
select 7d for 7 day, 5d for
5+1+1, or 0d for
nonprogrammable.
Use the or key to
4
select 4, 2c, or 4c time periods
per day.
LCD Will Show Adjustment Options
Use the or key to
2H2C
change between 2 or 3
stages of heat. 2 heat will
use Y1 as first stage and W2
as auxiliary.
3 heat will use Y1 as the first
stage, Y2 as the second stage
and W2 as the auxiliary.
STAGE
Use the or to select
YES 50
YES or NO.
If set to YES then use or
to select Balance point
BALANCE
Temperature of 10, 20, 30,
35, 40, 45 or 50 degrees.
POINT
YES
15, 30, 45, 60, 75, 90
continuous run time
minutes.
BALANCE
RUNTIME
Technician Setup
Default Tech Setup Steps
The pre-occupancy fan settings
will energize the fan before
90˚F
the occupied time to provide
Pre-Occupancy ventilation prior to scheduled
occupancy.
Fan
This feature only shows if the
technician setup step for time
periods is set to 2C or 4C.
44˚F
The display light can be
configured to stay on all the
time or come on when any key
is pressed.
Display Light
NOTE: HARDWIRE ONLY
˚F
Keeping the display light
continually "ON" will greatly
reduce battery life.
12
Allows you to put your phone
HOUR CLOCK
number in the display.
Contractor
You can choose ON or OFF.
ON
Call Number
When any key is pressed an
5d
audible beep will sound.
Beep
You can choose ON or OFF.
4
Contractor Call Number Note
If contractor call number is selected ON, the phone number entered will
show in the display if there has been a continuous call for heating or
cooling for 24 hours or if the light button is held down for 3 seconds. To
remove the phone number from the display, hold the light button down
for 3 seconds.
Technician Setup
Tech Setup Steps
Default
This feature adds humidity when
SYSTEM key is in heat.
2
Humidify
STAGES
See terminal options on following
page.
This feature removes humidity
when SYSTEM key is in cool.
Dehumidify
See terminal options on following
page.
This feature allows the installer
to change the calibration of the
Humidity
ambient humidity displayed.
Calibration
This feature forces the A/C to run
longer to remove humidity when
needed. The A/C will "over cool"
Dehumidify
the room a few degrees until the
with AC
humidity reaches the desired
NO
setpoint.
The amount of over cooling
allowed when using A/C to
Over Cool
remove humidity. This screen is
only shown when ON is selected
Limit
in the "Dehumidify with AC" tech
setup step.
Options for how the HUM
NO
terminal energizes.
HUM
Terminal
LCD Will Show Adjustment Options
You can select the
OFF
pre-occupancy fan from OFF,
1, 2, or 3 hours.
PRE If 1, 2, or 3 is selected, the
fan will turn on that many
OCCUPY
hours prior to the scheduled
occupied time period.
FAN
Use the or key to to
turn on or off.
OFF configures the display
light to come on when the
dL
light key or any button is
pressed.
ON configures the display
light to stay on.
If selected ON, you will
OFF
see the input screen after
pressing NEXT STEP.
Use the or key to
select the desired number
and the or key to
move from one character to
another. See note below for
operation.
If ON is selected the beep
will sound.
b
If OFF is selected there is no
sound.
LCD Will Show Adjustment Options
Use the or key to
OFF
turn on of off.
If ON is selected the humidity
will be displayed on the main
screen and HUM terminal
will energize when humidity
setpoint is above ambient
HUMIDITY
humidity in Heat mode.
Use the or key to
OFF
turn on of off.
If ON is selected the humidity
will be displayed on the main
screen and DHM terminal
will energize when humidity
setpoint is below ambient
DEHUMIDIFY
humidity in Cool mode.
Use the or key to
0
adjust the calibration +/-3.
1= approx. 5%
HUM
CALIBRATE
Use the or key to
select YES or NO.
If selected Yes, allows over
cooling to be used to control
humidity in cool mode. If NO
d HUMIDIFY
is slected the system will not
AC
use over cooling.
Use the or key to
3
select the maximum number
of degrees of over cool.
Options are: 2, 3, 4, 5
Degrees.
OVER COOL
LIMIT
Use the or key to
1
select the one of the four
options.
View the HUM terminal chart
HUM
below for an explanation of
TERMINAL
these options.
Default
OFF
OFF
OFF
ON
Default
OFF
OFF
0
NO
3
1