Használati útmutató Honeywell DT90

Honeywell Termosztát DT90

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Oldal 1/8
EN0H 8578 UK07 R1 12/08
DT90
DIGITAL ROOM THERMOSTAT
PRODUCT SPECIFICATION SHEET
The new family of digital room thermostats is a DT90
range of market leading products designed to provide
comfort with economy in modern heating systems.
Its large display and simple button interface make DT90
extremely easy to use.
Energy efficiency is addressed by state- - -art TPI of the
control performance and an ECO button energy saving
feature.
Applications include control of gas or oil-fired boiler
systems, underfloor heating, electric heating and zoning
systems.
With a modern fresh look that complements any style of
décor, and a range of valued features for users and
installers alike, sets the standard for simple DT90
environmentally-friendly room thermostats.
FEATURES
Energy saving TPI control performance
Advanced -learning control adapts to the self
environment and ensures close temperature
control with minimum energy usage
Slim modern styling
Large high contrast display with easy- -read to
characters
Simple user interface
Temperature setting procedure eliminates the
risk of accidental setpoint change
Display shows room temperature, with option
to inquire about setpoint
5°C to 35°C setpoint range with 0.5°C
increme nts
Temperature set using up or down buttons
Off/standby button, allowing manual switch off,
with frost protection active
Adjustable off/standby setpoint 5°C to 16°C or
DT90 can be set to off completely
Battery powered by 2 x AA (LR6) alkaline cells
Up to 4 years battery life (minimum 2 years),
with battery low warning
Simple battery change by unclipping front
cover
Installer Mode allows the thermostat to be
customised for the application and the needs of
the user
NVRAM storage of setup parameters, ensuring
these are never lost
Setpoint limits can be programmed in
24…230Vac SPDT potential-free contacts for
simple 2-wire installation
8 A resistive, 3 A inductive switch rati ng
Surface or switch-box mounting options
Sensor fault self-diagnostics
Heat/cool changeover operation mode possible
FEATURES UNIQUE TO DT90E ECO MODEL
Energy saving ECO button allows user to
change to a lower, energy saving setpoint for a
timed period of their choosing (1…24 hours)
Display shows countdown of time remaining in
ECO energy saving mode
DT90 DIGITAL ROOM THERMOSTAT
2 EN0H 8578 UK07 R1 12/08
SPECIFICATIONS
CONTROLS / DISPLAY LAYOUT
ELECTRICAL
2 x 1.5V IEC LR6 (AA) Alkaline cells
Typically 4 years, minimum 2 years (with
correctly specified alkaline cells)
Display will indicate when battery power
reserve is low. Unit will continue to
function for a minimum of 4 weeks after
the first indication is given
SPDT (single pole double throw )
potential free
230 V, 50…60 Hz, 0.01 A to 8 A
resistive, 0.1 A to 3 A inductive (0.6pf)
24 V, 0…60 Hz, 0.01 A to 8 A resistive,
0.1 A to 3 A inductive (0.6pf)
100,000 operations minimum
Terminal block capable of accepting
wires up to 2.5mm²
Rear, top and left side
ENVIRONMENTAL & STANDARDS
0°C to 40°C
-20°C to 55°C
Humidity range 10% to 90% rh, non-
condensing
IP30
CE mark, complying with standards
, EN60730-1: 2001 EN60730-2-9: 2002
, EN55014-1: 2001 EN55014-2: 1997
WEEE & RoSH compliant
C-tick
TEMPERATURE CONTROL
Sensing element
10K (@25°C ) NTC thermistor
Temperature
setting range
5°C to 35°C setpoint range in 0.5°C
increments
Control form
Self-learning TPI Fuzzy Logic algorithm
Proportional
band
1.5°C adjustable up to 3°C in 0.1°C
increments
Minimum on/off
time
1 minute, adjustable up to 5 min in 1 min
increments
Cycle rate
Adjustable to suit the application 3, 6, 9,
12 cycles per hour
Temperature
control accuracy
± 0.5°C (or better) at 20°C, 50% load and
3°C /hour temperature ramp
Frost protection
5°C when thermostat switched to
off/standby, adjustable 5°C to 16°C
Frost protection not available in cooling
mode
Positive off
Positive off possible (no frost protection)
by setting in Installer Mode
ECO energy
saving
Setpoint default 18°C, adjustable 5°C to
35°C
Fail-safe
operation
If temperature measurement system
fails, unit will continue to operate on the
assumption of a 10% load
METRICS
Dimensions
(unit)
90 x 92 x 27mm
Dimensions
(pack)
93 x 94 x 46 mm
Weight (unit)
165g
Weight (pack)
192g
battery low warning
fault indicator
setpoint indicator
off/standby indicator
off/standby button
temperature display
frost protect indicator heating demand indicator
ECO mode countdown timer
ECO button
ECO countdown indicatorECO mode active
setpoint change buttons
DT90A DT90E
DT90 DIGITAL ROOM THERMOSTAT
3 EN0H 8578 UK07 R1 12/08
ORDERING SPECIFICATI ON
Extra-Large Display
The DT90 display is more than double the size of its
predecessor, ensuring it is even easier to read and
allowing more information to be displayed, when
required. The large characters and high contrast screen
are especially important for those with impaired vision.
Simple Interface
The user interface has been made as simple as
possible to make DT90 very easy to use. Buttons have
been labeled ▲ and ▼ to identify them as the means of
increasing and decreasing (respectively) the setpoint
temperature. The display normally shows the actual
room temperature. When one of the buttons is first
pressed, the setpoint temperature is shown flashing,
accompanied by the ▲ and ▼ symbols. Further buttons
presses will increase or decrease the setpoint in
increments of 0.5°C.
Off/Standby Button, with Frost Protection
The off/standby button allows DT90 to switch off the
heating (or cooling) system at the touch of a button. To
prevent accidental switch-off, the button must be held
for 2 seconds to activate the change. When off, DT90
will maintain control at a frost protection setpoint,
factory set to 5°C but adjustable between 5 and 16°C. If
required, frost protection can be switched off, to provide
a positive off function. These adjustments are made by
entering the DT90 Installer Mode.
Installer Mode
The Installer Mode is where DT90 can be configured for
different applications, and customized to meet the
needs of the user. The operating properties that can be
adjusted are called parameters, and these are
described in detail on page 6.
Parameters are as follows:
Minimum on/off time
Cycle rate
Proportional band width
Temperature measurement offset
Upper setpoint limit
Lower setpoint limit
Energy saving ECO temperature (on DT90E only)
Selection of heat/cool changeover operation
Off/Standby setpoint
Electric heat operation
Reset all parameters to factory settings
Installer Mode is entered via a sequence of button
presses. The buttons are also used to scroll between
parameters and to make changes to their values.
MAIN FEATURES
NVRAM Storage of Settings
All parameter settings are stored in a special kind of
memory called NVRAM so they will be retained
indefinitely even if the batteries are removed.
Advanced Self-learning TPI Control
DT90 uses a self-learning „fuzzy logic‟ time-proportional
control algorithm. This form of control is better than
conventional PI control as it has a faster response and
better performance in steady state conditions. It
performs equally well in a wide range of different
installations, and ensures energy savings by controlling
closer to setpoint and minimising temperature
overshoots.
Addition Energy saving ECO feature al
In a heating system, one of the best ways to save
energy is to reduce the setpoint temperature. The DT90
green ECO button provides a simple and convenient
way of doing this for a period of time of the user‟s
choice. The ECO energy saving setpoint is pre-defined
in the Installer Mode. The factory setting is 18 , but it °C
can be adjusted (between 5 ) to give a °C and 35°C
timed boost, if required. When the ECO button is
pressed, the user is given the chance to set the time
required at this new temperature, from 1 hour to 24
hours in 1 hour increments. The display indicates that
ECO mode has been set, and will count down the time
remaining in energy saving mode. Should they wish to
readjust the temperature setting, they can do that too,
using the buttons. ▲ and ▼
ECO mode is cancelled simply by pressing the ECO
button again.
24 …230V 8(3)A SPDT Potential Free Contact Rating
The DT90 switching relay has a high specification and
wide switching range, suitable for most domestic
applications. As the thermostat is battery powered, only
a 2 wire connection is required to operate the load.
Electric heating loads up to 8A (1.6kW) can be switched
directly, but please note that if more than 3A is being
switched, the electric heat parameter EH should be set
to value = 1 in the Installer Mode. This ensures the
relay is operated with a higher energy, to switch higher
currents reliably.
Model
Description
Literature
DT90A1008
Digital room thermostat
Multi-lingual
DT90E1012
Digital room thermostat with ECO energy saving feature
Multi-lingual

Termékspecifikációk

Márka: Honeywell
Kategória: Termosztát
Modell: DT90

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