BN Thermic U16C User guide

U16c

BN

Description

The U16c programmable thermostat provides the following tem­perature control modes:

A mode: controls and displays the ambient air temperature
Fmode:

AF mode:

Day and
time setting

Schedule
programming

Clear

Modeselection /
Exit

* Use this button to disable heating (e.g. in the summer). The thermostat remains
powered and continues to display the time and temperature.

Appears when the
setpoint temperature
is displayed

Manual mode

Automatic mode

controls and displays the floor temperature using
an external temperature sensor (default mode)

controls and displays the ambient air temperature
maintains the floor temperature within desired
limits using an external temperature sensor

Temperature
presets

On/Off button *

Temperature
adjustment

Display

Time

Day

Temperature

Preset temperature
indicators

User Guide

Programmable Thermostat

1.

Faceplate Installation

Refer to theinstallation guide of the power base.
Insert the tabs at the top of the faceplate in the slots at the top of

the power base.
Secure the faceplate using the captive screw underneath the
base.

Faceplate
(control module)

Power base

NOTE: Keep the thermostat's air vents clean and unobstructed at all
times.

Power Up

Apply power to the thermostat at the main electrical panel. At
power-up, the thermostat is in manual mode and displays the
actual (measured) temperature. The setpoint temperature is 28 °C

(82 °F).

Error Messages

LO The actual temperature is below 0 °C (32 °F).
HI The actual temperature is above 70 °C (158 °F).
Er The thermostat built-in sensor is defective. Replace the

thermostat.

E1 The floor sensor circuit is opened. Check the sensor

connections.

E2 The floor sensor circuit is shorted. Replace the sensor.

Configuration

2.

3.

4.

5.

Amount of heating *

Periods

* The thermostat displays the amount of heating required to maintain the desired
temperature. For example, is displayed when heating is at 40 percent.

Display
% of heating 1 to 24% 25 to 49% 50 to 74% 75 to 99% 100%

Mode indicator (A, F or AF)
Appears when

heating is disabled

5.1 Control Mode Selection

Press and hold the Clear button for 3 seconds. The current con­trol mode is displayed

Press the to select between A, AF and F.

NOTE

: If you have chosen the A or F mode, go to step 7. If you have chosen
the AF mode, the thermostat will control the ambient temperature while keeping
the floor temperature within desired limits. If the floor temperature is too low or
too high, the thermostat will turn heating on or off to maintain the floor tempera­ture within the limits regardless of the ambient temperature. The minimum and
maximum floor temperature limits are factory-set at 5 °C (41 °F) and 28 °C

F) respectively. To modify the limits, continue with the next step:

(82 °

Press the

Clear

Press the button to set the minimum limit.

(ctl).

button briefly. The minimum limit is displayed (

FL:LO

).

Press the

Clear

button briefly. The maximum limit is displayed (

FL:HI

Press the buttons to set the maximum limit.
Press the Mode/Return button to exit and save the changes.

NOTE: If no button is pressed for 60 seconds, the thermostat will
save the changes and return to normal display.

5.2 Other Configurations

This procedure allows you to choose the following configurations:

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 Early Start setting (see the note below) On

Press and hold the Pgm button for 3 seconds. The current tem­perature unit is displayed (unit).

Press the to toggle between °C and °F.
Press the Pgm button briefly . The current time format is dis-

played (Hr).
Press the to toggle between 24H and 12H.

Press the Pgm button briefly . The current Early Start setting is
displayed (ES).
Press the to toggle between OFF and On.

Press the Mode/Return button to exit and save the changes.

NOTE: Early Start can be used in Automatic mode only. When this function is
set to On, the thermostat calculates the optimal time to start heating in order
to obtain the desired temperature by the set time. The thermostat re-assesses
the start time daily based on the previous day’s results.

Clock and Day Setting

Press the Hour button to set the hour.
Set the Min button to set the minutes.
Set the Day button to set the day.

Press Mode/Return to exit and save the changes.

).

Temperature Adjustment

7.

7.1 Setpoint Temperature

The thermostat normally displays the actual (measured) temperature.
To view the setpoint, press one of the buttons once. The setpoint
will appear for the next 5 seconds.

To change the setpoint, press one of the buttons until the desired
temperature is displayed. To scroll faster, press and hold the button.

Backlight

The screen is lit for 12 seconds when any button is pressed.

7.2 Preset Temperatures

The thermostat has 2 preset temperatures:

Comfort temperature
Economy temperature

To use a preset temperature, press the corresponding button. The
corresponding icon will be displayed.

The following table shows the intended use and the default value of
each of the preset temperatures.

Icon Intended use A/AF modes F mode

Comfort
(when at home)

Economy
(when asleep or away from home)

21 °C (70 °F) 28 °C (82 °F)

16.5 °C (62 °F) 20 °C (68 °F)

To store a preset temperature:

Set the desired temperature using the buttons.

6.

Press and hold the corresponding temperature preset button
until the corresponding icon is displayed.

8.

Modes of Operation

The thermostat has 2 modes of operation: automatic mode and man­ual mode.

Daylight Savings (DLS) Time

When the DLS function is set to US, the thermostat switches to Day­light Savings Time on the second Sunday of March and to normal
time on the first Sunday of November.
When the DLS function is set to Eu, the thermostat switches to Day­light Savings Time on the last Sunday of March and to normal time
on the last Sunday of October.

NOTE: The DLS function is OFF (default setting) when the clock
loses its setting.

Press the Day button (3 seconds) until DLS appears
on the screen.

Press the to toggle between US, Eu and OFF.
Press the Day button briefly. The year setting is dis-

played.
Press the to set the current year.
Press the Day button briefly. The month setting is dis-

played.
Press the to set the current month.
Press the Day button briefly. The date setting is dis-

played.
Press the to set the current date.
Press Mode/Return to exit and save the changes.

8.1 Automatic Mode

Use automatic mode if you want the thermostat to fol­low the programmed schedule. The schedule has 4
time periods and uses the 2 preset temperatures. The
thermostat switches to Comfort temperature in periods
1 and 3 and to Economy temperature in periods 2 and

4. The following table shows the intended use of each
time period.

Periods Temperature setting Typical use

Comfort
Economy
Comfort
Economy

To use the automatic mode, press the Mode button to display on

creen. The current period number will also appear.

he s

t

Wake-up

At work

At home

Sleep

Preprogrammed schedule

The thermostat has been programmed with the following schedule.

Period

Temperature

setting

Comfort

Economy

Comfort

Economy

MO TU WE TH FR SA SU

6:00am6:00am6:00am6:00am6:00am6:00am6:00

8:30am8:30am8:30am8:30am8:30

4:00pm4:00pm4:00pm4:00pm4:00

11:00pm11:00pm11:00pm11:00pm11:00pm11:00pm11:00

Period start time

am

pm

am

--:-- --:--

--:-- --:--

pm

Temporary bypass

You can override the temperature of the current period by pressing
the , or buttons. The new setpoint will be used until the begin­ning of the next period. The clock icon flashes during the bypass.

To cancel the bypass, press the Mode button.

Customizing the schedule

Press Pgm. Period 1 of Monday is displayed.
If you wish to select another day, press Day repeatedly until the

desired day is displayed.

NOTE: To select all 7 days, hold the Day button for 3 seconds.
This function is helpful if you want the same program every day.
If you select all 7 days, the start time of the displayed period is
the same for all 7 days. For example, if period 1 is displayed
when you select all 7 days, period 1 will have the same start time
for all 7 days. If all 7 days are displayed when you select the next
period, the start time of that period will be the same for all 7
days.

If you wish to select another period, press Pgm repeatedly until
the desired period is displayed.
Press Hour and Min to set the period start time.

NOTE: If you want the thermostat to skip a period such as
periods 2 and 3 in the preprogrammed schedule, press Clear.
The thermostat will instead show --:-- to indicate that the period
will be skipped.

To program another period, go back to step 2.
Press Mode/Return to exit.

NOTE: If no button is pressed for 60 seconds, the thermostat will
save the changes and return to normal display.

Technical Specifications

Power supply: Refer to the power base’s installation guide
Ambient temperature setpoint range (A/AF models)
Floor temperature setpoint range (F model): 5 °C to 40 °C (40 °F to 104 °F)
Floor temperature limit range (AF model): 5 °C to 40 °C (40 °F to 104 °F)
Temperature display range: 0 °C to 70 °C (32 °F to 158 °F)
Temperature display resolution: 0.5 °C (1 °F)
Operating temperature: 0 °C to 50 °C (32 °F to 120 °F)
Storage temperature: -20 °C to 50 °C (-4 °F to 120 °F)
Heating cycle length: 15 minutes
Software: Class A
Automatic action: Type 1B and 1Y
Protection index: IP21
Power outage: All programs and temperature settings are saved du

power outage. The clock must be reprogrammed if the power outage lasts
more than 4 hours. When power returns, the thermostat returns to the mode
of operation preceding the outage.

Size (H/W/D): 83 x 79 x 13 mm (3.3” x 3.1” x 0.5”)

: 5 °C to 30 °C (40 °F to 86 °F)

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Technical Assistance

BN Thermic Ltd

34 Stephenson Way, Three Bridges, Crawley
West Sussex RH10 1TN
England

Contact Us

For information, advice, prices or technical assistance

Tel: [phone]
Fax: [phone]
Email: [e-mail]

BN

9.

10.

11.

8.2 Manual Mode

In manual mode, the programmed schedule is not
used. Use this mode if you wish to set the temperature
manually or keep the same temperature all the time.

To use the manual mode:

Press the Mode button to display .
Set the temperature using the buttons or

select one of the preset temperatures by pressing the or
button.