Schulter Systems DH E RS D/BW User manual

DH E RS D/BW
Smart Programmable Digital Thermostat
for Heated Floors
User’s Guide
For further information or to consult this guide online,
please visit www.schluter.com
08/2014

1.Description
The DH E RS D/BW digital thermostat can be used to control
heating floors with electrical current − with a resistive load −
ranging from 0 A to 16 A at 120/208/240 VAC. It has an easy
user interface and can manage up to four programming periods
a day. It keeps the temperature of a room ( mode) and a
floor ( mode) at a requested set point with a high degree
of accuracy.
Floor Mode (factory setting): this control method is ideal
in areas where you want a warm floor at any time and when
the temperature of the ambient air can be high without causing
discomfort. For example, in a bathroom.
WARNING WARNING
Before installing and operating this product, the owner
and/or installer must read, understand and follow
these instructions and keep them handy for future
reference. If these instructions are not followed, the
warranty will be considered null and void and the
manufacturer deems no further responsibility for this
product. Moreover, the following instructions must
be adhered to in order to avoid personal injuries or
property damages, serious injuries and potentially
fatal electric shocks. All electric connections must
be made by a qualified electrician, according to the
electrical and building codes effective in your region.
Do NOT connect this product to a supply source other
than 120 VAC, 208 VAC or 240 VAC, and do not exceed
the specified load limits. Protect the heating system
with the appropriate circuit breaker or fuse. You
must regularly clean dirt accumulations on or in the
thermostat. Do NOT use fluid to clean thermostat air
vents. Do NOT use where exposed to water.
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Ambient Mode (you only have to press down the
A/F button to switch from one mode to the other): this
control method is ideal when you want a stable ambient air
temperature (without fluctuation). Usually, this mode is used in
large and often occupied rooms where temperature variations
can be uncomfortable. For example, in a kitchen, a living room
or a bedroom.
Some factors cause variations in ambient air temperature. They
include large windows (heat losses or gains due to outside
temperature) and other heat sources such as a central heating
system, a fireplace, etc. In all these cases, the mode will
ensure a uniform temperature.
This Thermostat is not Compatible with the Following
Installations:
• electrical current higher than 16 A with a resistive load (3840 W
@ 240 VAC, 3330 W @ 208 VAC and 1920 W @ 120 VAC);
• inductive load (presence of a contactor or relay); and
• central heating system.
Parts Supplied:
• one (1) thermostat;
• two (2) mounting screws;
• four (4) solderless connectors suitable for copper wires;
• one (1) floor temperature sensor.
2. Installation
Selection of Thermostat and Sensor Location
The thermostat must be mounted on a connection box, at
around 1.5 m (5 feet) above the floor level, on a section of the
wall exempt from pipes or air ducts.
Do not install the thermostat in a location where temperature
measurements could be altered. For example:
• close to a window, on an external wall, or close to a door
leading outside;
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• exposed directly to the light or heat of the Sun, a lamp, a
fireplace or any other heat source;
• close or in front of an air outlet;
• close to concealed ducts or a chimney; and
• in a location with poor air flow (e.g. behind a door), or with
frequent air drafts (e.g. head of stairs).
To install the sensor, refer to the installation guide of your
heating floor.
Thermostat Mounting and Connection
1. Cut off power supply on lead wires at the electrical
panel in order to avoid any risk of electric shock;
Ensure that the thermostat will be installed on a
junction box located in an uninsulated wall;
2. Ensure that the air vents of the thermostat are clean and clear
of any obstructions;
3.Using a screwdriver, loosen the screw retaining the mounting
base and front part of the thermostat. Remove the front part of
the thermostat from the mounting base by tilting it upward;
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4. Align and secure the mounting
base to the connection box using
the two screws supplied;
5. Route wires coming from the wall through the hole of the
mounting base and make the required connections using the
“Four-wire installation” figure, and using the supplied solderless
connectors. A pair of wires (black) must be connected to the
power source (120-208-240 VAC) and another pair (yellow)
must be connected to the heating cable (refer to the drawings
displayed on the back of the thermostat). For connections with
aluminum wires, you must use CO/ALR connectors. Please
note that thermostat wires do not have polarity, meaning that
any wire can be connected to the other. Then, connect the
wires of the floor temperature sensor at the indicated location
behind the thermostat. Two floor temperature sensors are
provided - one with the DITRA-HEAT-E-RS thermostat and
one with the DITRA-HEAT-E-HK heating cables. Both floor
temperature sensors are installed within the tile assembly.
One sensor is connected to the thermostat, while the other
is stored in the thermostat electrical box. The second sensor
can be easily connected in case of damage to the first sensor.
Four-wire installation
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Thermostat to power
source connection
Thermostat to heating
cable connection
The heating cable must be grounded.

6. Reinstall the front part of the thermostat on the mounting base
and tighten the screw at the bottom of the unit;
7. Turn on the power;
8. Set the thermostat to the desired setting (see the following
section).
3. Operation
Security mode
Ambient
temperature
(Ambient mode)
Floor
temperature
(Floor mode)
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First Start-up
At the first start-up, the thermostat is initially in the Man (manual)
and modes. The temperature is displayed in degrees Celsius
and the standard factory set point adjustment is 21°C (70°F).
The hour displays --:-- and must be adjusted before switching
to the Auto or Pre Prog mode. The maximum floor temperature
is limited to 28°C (82°F).
Ambient and Floor Temperature
The figures displayed below the icon indicate the ambient
temperature, ±1 degree. The figures displayed below the
icon indicate the floor temperature, ±1 degree.
Both temperatures can be displayed in degrees Celsius or
Fahrenheit (see “Display in degrees Celsius/Fahrenheit”).
Temperature Set Points
The figures displayed beside the icon indicate the ambient
() or the floor ( ) temperature set points. They can be
displayed in degrees Celsius or Fahrenheit (see “Display in
degrees Celsius/Fahrenheit”).
Out of any adjustment mode, press down the + button to
increase the set point, or the - button to decrease it. Set points
can only be adjusted by increments of 1 degree. To quickly scroll
through the set point values, press and hold down the button.
Maximum Floor Temperature Limitation
At any time, the floor temperature (in mode) is maintained at
less than 28°C (82°F) in order to avoid overheating caused by an
excessive heating request, which could damage some materials
or be detrimental for health.
Adjustment of the Hour and the Day of the Week
Adjustment procedure of the hour and the day of the week.
1.Press down the Day/Hr button, whether it is in Man, Auto or
Pre Prog mode.
2.At this moment, the icon and the day of the week blinks and
you can adjust the day of the week using the + or - button and
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confirm your choice by pressing down the Mode or Day/Hr
button. You can also press down the desired day of the week
button without using the + or - button and confirm your choice
using the Mode or Day/Hr button.
3.The two figures indicating the hour blink. You must adjust
them using the + or - button and confirm your choice by
pressing down the Mode or Day/Hr button.
4.The two figures indicating the minutes blink. You must adjust
them using the + or - button and confirm your choice by
pressing down the Mode or Day/Hr button. The adjustment
is then completed and the thermostat returns to the previous
mode.
At any time, you can exit the adjustment mode of the day and the
hour by pressing down the Exit button or by not pressing any
button during 1 minute.
In case of a power failure, the thermostat is self-sufficient for 2
hours. If the failure lasts less than 2 hours, the thermostat saves
the adjustment of the hour and the day of the week. When the
power is restored after an extensive failure (more than 2 hours),
the hour and the day of the week are recovered, but you must
update them.
Display in Degrees Fahrenheit/Celsius
The thermostat can display the ambient temperature and the set
point in degrees Fahrenheit (standard factory setting) or Celsius.
Adjustment procedure for degrees Fahrenheit/Celsius display.
1.To switch from the degrees Fahrenheit to the degrees Celsius,
and conversely, simultaneously press down the + and -
buttons for more than 3 seconds until the icon blinks.
2.Press down the + button to switch from the degrees Fahrenheit
to the degrees Celsius, and conversely. The degree Fahrenheit
or Celsius symbol is displayed.
3.When the adjustment is completed, press down the Exit
button or do not press down any button during 5 seconds to
exit the adjustment function.
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This adjustment can be done from any of the three principal
modes.
Manual Mode (Man)
From the Manual mode, you can manually adjust the thermostat
set point by pressing down the + or - buttons to increase the
value, or to decrease it. Please note that if the backlight is
off, the set point will not change when you press down these
buttons for the first time instead, the backlight will be activated.
To quickly scroll through the set point values, press and hold down
the button. From mode, the set points can range between
3 and 35°C and can only be adjusted by increments of 1°C (from
37 to 95°F; by increments of 1°F from the Fahrenheit mode).
From mode, the set points can range between 3 and 28°C
(from 37 to 82°F). The thermostat will turn off if the set point is
lowered below 3°C (37°F), and the set point value displayed will
be --. The standard factory set point adjustment is 21°C (70°F)
(mode). From this mode, the screen displays the /
mode temperature, the /mode set point, the hour and
the day of the week.
This mode is initially activated when the power is turned on for the
first time. You must adjust the hour (as described in the section
“Adjustment of the hour and the day of the week”) before switching
to other modes by pressing down the Mode or Pre Prog button.
Automatic Mode (Auto)
To switch from the Manual mode to the Automatic mode, and
conversely, press down the Mode button. The Man or Auto icon
is displayed at the bottom of the screen as applicable.
From the Automatic mode, the thermostat adjusts the set points
according to the programmed periods. If no data is entered, the
thermostat acts as in Manual mode and the standard factory
set point adjustment is 21°C (70°F) ( mode). It is always
possible to manually adjust the set point using the + or - button.
The selected set point will be effective until one period is
programmed, which represents an hour and a day of the week.
Note that, if the set point is lowered to off (--), the programming
will not be effective. It is possible to program 4 periods a day,
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meaning that the set point can change automatically up to 4
times a day. The period order is not important.
From this mode, the screen displays the temperature, the set
point, the hour, the day of the week and the current programmed
period number (1 to 4; as applicable).
After programming a day of the week, you can copy this setting;
see “Copy of the Programming”.
1.To access the Programming mode, press down the day of the
week button that you want to program (Mon to Sun). Once you
release the button, the selected day of the week is displayed,
the icon blinks and the period number 1 blinks too.
2.Select the period number (1 to 4) that you want to program
using the + or - button. For each period, the hour and the set
point are displayed. The hour displays --:-- and the set point
displays -- if there is no programming for the period. You must
confirm the period by pressing down the Mode button.
3.The two figures representing the hour blink to indicate that you
can adjust them (from 00 to 23) using the + or – button. You must
confirm the adjustment by pressing down the Mode button.
4. After confirmation, the figures representing the minutes (the
last 2 figures) blink. You can adjust and confirm them in the
manner described in point 3. Note that the minutes can only
be adjusted by increments of 15 minutes.
5. The period set point blinks and you can adjust it using the
+ or - button. You must confirm the adjustment by pressing
down the Mode button.
6.After set point confirmation, the programming is completed.
The following period number blinks. For example, if the
previously programmed period was 1, period 2 blinks. It is
then possible to continue the programming of this period by
pressing down the Mode button. You can also select another
period using the + or – button.
7.At the end of period 4 programming, you automatically exit the
Programming mode.
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At any time, you can exit the Programming mode using one
of these 3 methods:
1-Press down the button of the day you are adjusting.
2-Press down the button of another day to program it.
3-Press down the Exit button.
Moreover, if you do not press down any button for more than
1 minute, the thermostat will exit the Programming mode. In all
cases, the programming is saved.
Anticipated Start
This mode enables the room to reach the selected temperature
at the programmed hour by starting or stopping the heating
before this time. In fact, the thermostat estimates the delay
required to reach the set point of the next period at the
programmed hour. This delay is obtained by the observation of
the temperature variations in the room and the results obtained
during the preceding anticipated starts. Therefore, results
should be increasingly precise day after day. From this mode,
the thermostat displays at any time the set point ( ) of the
current period. The icon will blink when the anticipated start
of the next period begins.
For example, if the requested temperature between 8h00am and
10h00pm is 22°C (72°F) and between 10h00 pm and 8h00am
is 18°C (64°F), the set point ( ) will indicate 18°C (64°F) until
7h59am and will switch to 22°C (72°F) at 8h00am. Thus, you will
not see the progression carried out by the anticipated start, only
the desired result.
To activate or deactivate the anticipated start, the thermostat
must be in Auto or Pre Prog mode. Then, you must press down
the Mode button for at least 5 seconds. The anticipated start
icon ( ) is displayed or hidden to indicate the activation or the
deactivation of the mode. This modification will apply to the Auto
as well as the Pre Prog mode. If you modify the temperature set
point manually when these modes are activated, the anticipated
start of the next period will be cancelled.
Note: The anticipated start is initially activated when you enter
the Automatic or Preprogrammed mode. Thus, you must
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deactivate it following the above procedure if needed.
Copy of the Programming
You can apply the programming of one day of the week to other
days by copying the programming day by day or in block.
To copy the programming day by day, you must:
1.Press down the source day button (day to be copied).
2.Hold down this button and press down the destination days one
by one. The screen displays the selected days. If an error occurs
when you are choosing a day, press down the erroneous day
again to cancel the selection.
3.After all selections are completed, release the source day
button. The selected days have the same programming as the
source day.
To copy the programming in block, you must:
1.Press down the source day button, hold it and press down the
last day of the block you want to copy.
2.Hold down these two buttons for 3 seconds. After this time,
the days of the block are displayed indicating that the copy in
block is activated.
3.Release the buttons. The days of the block are not displayed
anymore and the current day is displayed.
Note: The block order is always increasing. For example, if the
source day is Thursday and the destination day is Monday, the
copy will only include Friday, Saturday, Sunday and Monday.
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Erasing of the Programming
You must proceed as follows to erase a programming period.
1.Access the Programming mode as described previously by
pressing down the button corresponding to the day to modify.
Select the period to erase using the + or - button.
2.You do not have to press down the Mode button to confirm the
selection. However, doing so will not impact on the erasing.
3.Simultaneously press down the + and – buttons to erase the
period programming. The hour displays --:-- and the set point
displays -- to indicate that the programming is erased.
4.The erased period number blinks and you can select another
period to be erased or exit the Programming mode following
one of the 3 methods described above.
Preprogrammed Mode
The Preprogrammed mode allows an automatic programming
of the thermostat. 252 preprogrammings have been defined for
mode and 252, for mode (A0 to Z1 and 0 to 9; see
appendix 1 to consult the corresponding tables). This mode
gives you the possibility to quickly program the thermostat using
preprogrammings commonly used without having to do it manually.
As from the Automatic mode, it is possible, at any time, to
manually adjust the set point. This set point will be effective until
the next set point change anticipated by the preprogramming.
Note that if the set point is lowered to off (--), the programming
will not be effective.
From this mode, the screen displays the /temperature,
the /set point, the hour, the day of the week and the letter
and current number of the preprogramming (A0 to Z1 and 0 to 9;
alpha-numeric segment displayed on the right-hand side of the
hour; see appendix 1).
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Choice of the Preprogramming
You can only access the Preprogramming mode when the
thermostat is out of any programming or adjustment function.
Make sure to choose the preprogrammings corresponding to
the right mode ( /, according to the attached tables).
You must proceed as follows to access the Preprogramming mode:
1.Press down the Pre Prog button.
2.The Pre Prog icon and saved selected preprogramming are
displayed. This preprogramming can range between 0 and Z1.
3. From the Pre Prog mode, you can choose the first 10
preprogrammings by pressing and releasing the Pre Prog button.
Each time you press down the button, the preprogramming
switches (from 0 to 9).
4.To choose advanced preprogrammings, (see appendix 1), press
down the Pre Prog button during 5 seconds. The letter indicator
blinks and you can adjust it by pressing down the + or - button.
Once the letter is chosen, you must validate your choice by
pressing down the Mode button. The letter ceases to blink and
the figure starts to blink. The choice of the figure is made in the
same way as that of the letter (using the + or - button). Once
the figure is selected, you must validate your choice by pressing
down the Mode button.
Note: If you do not press down any button for more than
one minute or press the Exit button, the thermostat exits the
adjustment function and saves the current choice. Then, the
icons cease to blink and the letter and the figure corresponding
to the selected preprogramming blink alternately until you select
another preprogramming. If the Pre Prog mode is activated
and you successively press down the Pre Prog button, the
preprogramming comes back to 0 and increases normally, as
described above.
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View of the Preprogramming
The view of the selected preprogramming is made in a way
similar to the Auto mode programming. However, it is impossible
to modify the preprogramming.
You must proceed as follows:
1.Press down the button corresponding to the day to view
(buttons Mon to Sun). When the selected day is displayed, the
icon and period number blink.
2.Choose the period number (1 to 2) to view using the + or -
button. For each period, the hour and set point are displayed.
You can also press down the Mode button to switch to
period 2. If you press down the Mode button when period 2 is
displayed, you exit the View mode.
At any time, you can exit the View mode using one of these
3 methods.
1- Press down the button of the day you are viewing.
2- Press down another day to view it.
3- Press down the Exit button.
If you do not press down any button during 1 minute, the
thermostat quits the view mode. At any time, it is possible to
change the day to be viewed by pressing down the desired day
button.
/Mode
To switch from the mode to the mode, or conversely,
press down the A/F button (when you are not in any adjustment
mode). Then, the temperature set point will become the same
as the or mode temperature, as applicable. However,
if a set point is programmed for the current period, it will take
this value.
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Safe mode
If the thermostat fails to detect the presence of a floor sensor,
it will automatically revert to mode at a set point of 21°C
(70°F). (with a maximum set point temperature of 24°C – 75°F.)
Sensor Selection
If you want to use the DH E RS D/BW thermostat of Schluter®-
Systems with a temperature sensor already installed in the floor
(other than the sensor supplied with this thermostat), you must
contact the Schluter®-Systems customer service to validate
the compatibility between the sensor and the thermostat. You
must know the serial number and name of the installed sensor.
Temperature Control
The thermostat controls the floor/ambient temperature (according
to the /mode) with a high degree of accuracy. When the
heating starts or stops, it is normal to hear a “click” sound. It is the
noise of the relay which opens or closes, as applicable.
Backlighting
The screen lights up when you press down a button. If you
do not press down any button for more than 15 seconds, the
screen turns off.
If you press down the + or – button once when the backlight
is off, it will light up without changing the set point value. The
set point value will change only if you press down one of these
buttons again.
Ground-fault Circuit Interrupter (GFCI)
The GFCI is designed to reduce the risk of electric shock. It
can detect a leakage current of 5mA. If a defect is detected,
the GFCI device lights up, and both screen and heating system
circuit are deactivated. The GFCI can be reinitialized either
by pressing down the Test button or by disconnecting the
thermostat at the electrical panel.
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Ground-fault Circuit Interrupter (GFCI) Verification
It is important to verify the ground-fault circuit interrupter
installation and operation on a monthly basis.
GFCI verification procedure
1- Increase the temperature set point until the heating power
bars are displayed (displayed in the bottom-right hand corner
of the screen).
2- Press down the Test button.
3- The following two cases can occur:
a) Successful test: The red indicator of the thermostat lights
up. In this case, press down once again the Test button
to reinitialize the ground-fault circuit interrupter, the red
indicator turns off.
b) Failed test: The red indicator does not light up and the entire
display blinks during 5 seconds. In this case, disconnect
the heating system at the electrical panel and call
Schluter®-Systems’ customer service.
Security mode
This mode imposes a maximum temperature set point which
is impossible to exceed regardless of the mode in progress.
However, it is still possible to lower the set point at your
discretion. The programming of the Auto and Pre-Prog modes
also respects this maximum temperature set point. Please note
that when the Security mode is activated, it is impossible to
switch from the mode to the mode, and conversely.
17

Procedures to activate Security mode
1.Exit any adjustment mode to manually adjust the set point at
the desired maximum value.
2.Simultaneously press down the + and - buttons during 10
seconds (note that after 3 seconds, the icon starts to blink
and the software version and date are displayed. Continue to
press down these buttons).
3.After 10 seconds, the icon is displayed indicating that the
Security mode is activated. Then, release the buttons.
Procedures to deactivate Security mode
1.To deactivate the Security mode, cut off the power supply
of the thermostat at the electrical panel and wait at least 30
seconds.
2.Restore the power supply to the thermostat. The icon will
blink during a maximum of 5 minutes, indicating that you can
deactivate the Security mode.
3.Simultaneously press down the + and - buttons for more than
10 seconds. The icon will then be hidden indicating that the
Security mode is deactivated.
Parameter Backup and Power Failures
The thermostat saves some parameters in its nonvolatile memory
in order to recovered them when power is restored (e.g. after a
power failure). These parameters are the current Man/Auto/Pre-
Prog mode, the hour and the day of the week, the Auto mode
programming (either from the or mode), the maximum
floor temperature (28°C – 82°F), the last selected programming
of the Pre-Prog mode, the /mode, the Celsius/Fahrenheit
mode, the last effective set point, the Security mode and the
maximum lock set point.
As mentioned above, the thermostat can detect a power failure. In
such a case, the adjustments described are automatically saved
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in the volatile memory and recovered when power is restored.
Then, the thermostat enters a very low consumption mode and
only displays the hour and day of the week. All the other functions
are deactivated.
The thermostat is self-sufficient for 2 hours. If the power failure
lasts less than 2 hours, the thermostat saves the adjustment of
the hour. However, when power is restored after an extensive
failure (more than 2 hours), it recovers the last mode (Man/Auto/
Pre-Prog) as well as the various adjustments that were effective
when the failure occurred (either from the or the mode).
The hour and the day of the week are also recovered, but you
must update them. The set point will be the same as what was
active when the failure occurred.
Note: During the first half hour of the failure, the hour and day
of the week are displayed. After half an hour, the screen
turns off in order to ensure energy saving.
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4. Troubleshooting
Problem Solution
The thermostat is hot.
In normal operating conditions, the
thermostat housing can reach nearly
40°C (104°F) at maximum load.
It is normal and will not affect the
operation of the thermostat.
Heating is always on.
Check if the thermostat is properly
connected. Refer to the installation
section.
Heating does not run even
if the thermostat indicates
it is on.
Check if the thermostat is properly
connected and make sure the red
indicator is not lit. Refer to the
installation section.
The display does not come on.
Check if the thermostat is properly
connected. Refer to the installation
section. Check the power supply at
the electrical panel.
The red indicator lights up
frequently. Contact customer service.
The displayed ambient
temperature is incorrect.
Check the presence of an air
stream or a heat source near
the thermostat, and correct the
situation.
The display indicates E1*, E2**
or E3***.
Faulty thermal sensor. Contact
customer service.
Weak luminosity of the
display.
Possibility of a bad contact. Check
thermostat wirings. Refer to the
installation section.
* E1: Faulty ambient exterior sensor (open circuit) - written in the ambient section
** E2: Faulty interior sensor (open circuit) - written in the ambient section
*** E3: Faulty floor sensor (open circuit) - written in the floor section
Note: If you do not solve the problem after checking these points, cut off the
power supply at the main electrical panel and contact customer service
(see page 24 for contact information).
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