DT92 WIRELESS DIGITAL ROOM THERMOSTAT
2
EN0H 8580 UK07 R1 09/15
SPECIFICATIONS
ELECTRICAL
Room thermostat
Power supply : 2 x 1.5V IEC LR6 (AA) Alkaline cells
Battery life : Minimum 2 years (with correctly specified
alkaline cells)
Battery low
warning
: Display indicates when battery power
reserve is low. Unit will continue to
function for a minimum of 4 weeks after
the first indication is given
Battery
replacement
: Configuration settings stored in NVRAM,
so are retained during battery
replacement
Relay Box
Power supply : 230 V, 50…60Hz 1VA max. Note –
requires permanent mains power supply
Switch type : SPDT (single pole double throw )
potential free
Electrical rating : 24…230 V, 50…60 Hz, 5 A resistive, 3 A
inductive (0.6pf)
Relay life : 100,000 operations minimum
Wiring : Terminal block for mains and relay wiring,
for wires up to 2.5mm²
Wiring access : Rear and left side
RF SPECIFICATION
Operation band : ISM (868.0-868.6) MHz, 1% duty cycle
Communication
range
: 30 m in a residential building environment
Communication
technology
: 2-way RF, using short, high rate
transmissions to minimise air time and
avoid collisions
Blocking
immunity
: Receiver class 2 (ETSI EN300 220-1
version 2.1.1)
RF binding
method
: Units are pre-bound at the Factory. Field
re-binding can be done, if required
RF test features : Transmission and signal strength tests to
assist location of components
ENVIRONMENTAL & STANDARDS
Operating
temperature
: 0°C to 40°C
Shipping &
storage
temperature
: -20°C to 55°C
Humidity : Humidity range 10% to 90% rh, non-
condensing
IP class : IP30
Approvals : CE mark, complying with standards
EN60730-1 (2001), EN60730-2-9 (2002),
EN55014-1 (2006), EN55014-2 (1997),
ETSI EN300 220-3, ETSI EN301 489-3
: WEEE & RoHS compliant
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
: If RF communication fails, relay box can
be set to switch off or operate at 20% on
Relay box
manual override
: Pressing the button on the relay box will
temporarily override the current relay
position. The relay status may change
with the next communication from the
room thermostat
USER INDICATIONS
Information : Current room temperature, setpoint,
off/standby mode, relay box relay status
(flame), RF communication, ECO mode
active, ECO mode countdown.
Warnings : Frost protection, internal fault, battery
low, loss of RF communications.
: Lockout (operation not permitted) and
boiler fault are possible, depending on
application and configuration of other RF
products.
METRICS
Dimensions : 90 x 92 x 27mm (thermostat)
: 90 x 92 x 30.5 mm (relay box
: 157 x 115 x 105 mm (pack)
Weights : 154g (thermostat with batteries)
: 96g (relay box)
: 380g (pack)
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