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CONTROLS/DISPLAY LAYOUT
Room Unit Layout:
1.
Day & Date Display
2.
Time Display
3.
Dynamic Text Display
(DTD)
4.
Burner On Indicator
5.
Battery Low Indicator
6.
Temperature Display
7.
Temperature Change
Buttons
8.
Information Enquiry
Button
9.
Slider Switch
10.
Green OK Button
11.
Program Buttons
12.
Battery Cover
13.
Battery Compartment
14.
Holiday Button
15.
Time Change Buttons
SPECIFICATIONS
ELECTRICAL
: 2 x 1.5 V IEC LR6 (AA) Alkaline cells
Room unit power
supply
: Minimum 2 years
Battery life
: Program retained in EEPROM
Battery
replacement
: 230V AC +10% - 15%, 50Hz
Receiver power
supply
: SPDT potential free
Switch type
: 24-230 V AC, 10 A resistive, 3 A inductive
Output rating
0.6 p.f.
: Cable terminals for mains and relay wiring
Wiring (receiver
only)
for max 2.5 mm
: from the rear (wall box mounting), right
Wire access
and bottom
RF
RF operation band : ISM (868.0-868.6) MHz, 1% duty cycle
: 30 m in a residential building environment
RF communication
range
: short, high rate transmissions to minimise
RF communication
technology
air time and avoid collisions
Blocking immunity : Receiver class 2 (ETSI EN300 220-1
version 1.3.1)
RF binding method : Factory pre-bound with the room unit.
ENVIRONMENTAL & STANDARDS
: 0 to 40
Operating
temperature
: 0 to 30
: -20 to 55
Shipping & storage
temperature
: Humidity range 10 to 90% rh, non-
Humidity
condensing
: 30
IP class
: EN60730-1(Nov 2000), EN55014-1(1997),
Meeting the
following
EN55014-2(2000), ETSI EN300 220-3
standards
(2000), ETSI EN301 489-3(2000)
2
EN0H 8557 UK07 R0 09/06
2
wire
o
C when relay load < 8 A
o
C when relay load > 8 A
o
C
TEMPERATURE CONTROL
Sensing element : 100K (@ 25
: Fuzzy Logic Algorithm
Control form
Minimum ON
10% of cycle time (min one minute),
time
adjustable to 2 to 5 min (see installer set
up)
: Selectable by application (see installer
Cycle rate
set up)
+
:
Temperature
0.5 K (nominal) @ 20
Δ/hour
control accuracy
: Off or cycling depending on the CM927
Fail-safe mode
system set-up
TIME SETTING/PROGRAMMING
: 24 hour or 12 hour AM/PM format
Time display
: Typically better than 10 minutes per year
Time keeping
accuracy
: 1-day with 6 daily time and temperature
Program
level changes
: Time of day - 1 minute
Time setting
resolution
Program – 10 minute steps
: Program : 5 to 35
Temperature
setting range
o
C to 16
work in cooling mode
: From 0
Room
Temperature
display range
CM921 CHRONOTHERM
o
C ) NTC thermistor
o
C, 50% load 3K
o
o
C in 0.5
C steps Frost
o
: 5
C or equal to lower limit (5
o
C). Frost protection does not
o
o
C to 50
C
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