Proportional Adaptive Mode
This mode analyses previous cycles in order to define the length of the upcoming cycle. This mode guarantees optimal
regulation of 3 cycles (switch #1 to 20 min.) or 4 cycles (switch #1 to 15 min.) per hour, regardless of the season.
Ideal for:
• Radiant or convection electrical heating system
• Circulator control in a hot water system
Conventional Mode with Anticipation
This mode turns the system On or Off when the temperature reaches preset levels. This mode is compatible with
all heating systems. It is recommended for a multi-zone system or when a thermostat directly controls a furnace
equipped with a combustion gas purge cycle of more than 30 seconds.
2.3
Pump Protection
For hot water installations, it is recommended to activate the pump at least one minute
every 24 hours in order to avoid seizure. Place switch #3 down to activate this function.
For all other installations, leave switch #3 in the Off position (otherwise your system will
be activated 1 minute every 24 hours).
2.4
Temperature in °C or °F
The thermostat is factory-set to °C. If you wish to change the temperature display to °F, slide
switch #4 upward. Please note that if you change from °C to °F or vice versa, you must reset
the Comfort (
R
), Economy (
) and Vacation (
) settings accordingly.
DT135 Digital Thermostat
Installation and User Guide
Installation
Must be installed by a competent person. To ensure your safety, make sure the mains power is switched OFF
before accessing wiring.
1.1
Install the Thermostat
Thermostat Configuration
Before installing the thermostat on the wall, it must be configured using the dip switches at the back.
2.1
15 or 20 minute Cycles
The thermostat can operate on 15 or 20 minute cycles. While
15-minute cycles provide greater comfort, the heating system will
be running more often.
2.2
Temperature Contol Modes
You can choose between two
temperature control modes:
Battery Installation
1
2
3
1.2-1.5m
1.2
Thermostat Installation
Remove the mounting plate from the thermostat.
1
Loosen the screw holding the mounting plate to the thermostat.
2
Lift the lower part of the plate to remove it fromthe thermostat.
3
Loosen the screw holding the wire cover, and remove it.
4
Secure the mounting plate to the wall and make the appropriate connection
(refer to section 2).
1.3
Wiring
Connection to a circulator
Connection to a boiler
Percentage
of heating *
Appears when the
setpoint is displayed
Temperature display
Preset temperature icon
DT135
DT135
DT135
DT135
1
2
3
4
*The thermostat displays the percentage of heating required to maintain the desired
temperature. For example, is displayed when heating is activated at 40 percent.
When you first install the batteries in the thermostat, the unit runs a sequence of tests for approximately
5 seconds. After the tests, the screen should display the current temperature.
Display
% of heating
1 to 24%
25 to 49%
50 to 74%
75 to 99%
100%
4
Preset Temperature
Default Setting
Comfort temperature
R
20 °C (68 °F)
Economy temperature
18 °C (64 °F)
Vacation temperature
10 °C (50 °F)
Temperature Settings
5
1
To set the Comfort temperature, select the desired degree using the
pq
buttons and push the
R
button until the
R
icon is displayed (about 3 seconds).
2
To set the Economy temperature, select the desired degree using the
pq
buttons and push the
button
until the
icon is displayed about
3 seconds).
3
To set the Vacation temperature, select the desired degree using the
pq
buttons and push simultaneously
the
R
and
buttons until the
icon is displayed (about 3 seconds).
This setting is can only be used by
the telephone controller or a home automation system
Technical Specifications
Power supply:
2 LR6 alkaline batteries
Max. resistive load:
5A @ 240 VAC
Max. inductive load:
2A @ 240 VAC
Auxiliary input (telephone interface):
12 VDC, +/- 10 %, 2.5 mA
Control device:
Electronic
Automatic action:
Type 1 B
Storage temperature:
-20 °C to 50 °C (-4 °F to 122 °F)
Operating temperature:
0 °C to 50 °C (32 °F to 122 °F) (95 % relative humidity without condensation)
Temperature setting range in heating:
5° C to 30 °C (40 °F to 85 °F)
Temperature display scale:
0.1 degree
Temperature reading accuracy:
+/- 0.5 °C (+/- 0.9 °F)
Software:
Class A
Insulation:
Class II
Protection degree:
IP 20
Environmental Compliance:
RoHS-Directive 2011/65/EU
7
Connection to Telephone Controller
or a Home Automation System
The thermostat incorporates a telephone controller or home automation
interface which allows you to switch from the
R
or
s
etting to the
Vacation setting (
), and vice versa.
NOTE: For details on wiring and operating the telephone controller or home
automation system, refer to the instruction manual of particular models.
6
© 2019 Resideo Technologies, Inc.
This product manufactured by Resideo and its affiliates.
The Honeywell Home trademark is used under license
from Honeywell International Inc. All rights reserved.
Bk-electronic GmbH
Hardhofweg 40
74821 Mosbach
Germany
For assistance with this product please visit
livewell.honeywellhome.com
Battery Replacement
The thermostat will display an icon indicating that the batteries must be replaced. This icon will flash for 60 days.
After this period, the thermostat will shut down your heating unit. After the battery replacement, you have to
reprogram the
R
,
and settings (refer to section 4).
EN + DE
33-00053ED-02
