GET
B-RF
Wireless Hot Water Cylinder Thermostat
Installation, Commissioning
and User
Instructions
Setting Dial
LCD Display. During normal
operation cylinder temperature is
displayed. When setting dial is
moved the display momentarily
changes to show set
temperalure.
Installation Instructions
The
CET
B-RF
is
a battery powered cylinder thermostat which
measures cylinder temperature using a strap-on
temperaturn sensor
fitted to the cylinder wall and wired to the thermostat which is
normany located adjacent to the cylinder. To avoid the need for
wiring, communication between the thermostat and the boiler or zone
valve is achieved using secure
RF
wireless communication.
A
receiver unit, type RX-1 is mounted adjacent to the boiler or the
control valve and responds to commands issued by the wireless
thermostat.
Thermostat
1.
The
produd should installed by a competent person. lnstallation
must be in
accordance with
the
current edition
of
the IEEE wiring
regulations.
2.
The
clamp on sensor should be mounted onto the cylinder wal at a
height equivalent to % the height of the cylinder. Care should be
taken to remove any insulation material from the cylinder and to
ensure that the copper surface of the cylinder is clean. See diagram
opposite for details.
3.
Before attaching the sensor to the cylinder using the strap provided.
a 2-core cable should be connected lo the sensor to allow mtercon-
nection to the thermostat setting unit.
4.
Apply the contact paste provided to the part of
the
sensor in contact
with the cylinder and clamp the sensor to the cylinder wall. A spacer
piece is provided for use with cylinders having thick insulation.
5.
Mount the wallplate of the thermostat selting unit
on
lo a wall
adjitcen( to the cylinder and connect the cable from the sensor to
terminals
2
& 3 of
the
wallplate. A wiring diagram
is
shown below.
6.
The
thermostat setting unit
can
now
be
mounted onto the wallplate
and
secured using the lwo screws on the bottom of the wallplate.
RX1
Receivar
unit
1.
The
product should installed by a competent person. lnstallation
must be
in
accordance with the current edition of the IEEE wiring
regulalions.
2.
Mount the
RX-1
wallplate onto the wan, cable access must
be
from
behind or below the wallplate. A typical wiring diagram showing the
inlerconnections between
time controls and zone valve is shown
opposite.
3.
The
RX-1
may now be mounted onto the wanplate and secured
using the lwo screws on the bottom of the wallplate.
2
x
AA/LR6/MN1500 alkaline baneries
30
metres line of sight
mperature range:
(W.H, D)
85
x
86
x
42
-zsmd-&*zp
,
.
.".Mu*".-
!*?.-.-
-
..
.,
-
.
-.
,
I
Palrina
Thermostat
to
Receiver
1.
Ensure that the power to the
RXl
is
turned on and that the time
controls are calling.
2.
Turn the thermostat setting knob to setting
5.
3.
Remove the knob from the thermostat ad press and hold for
3
seconds the 'Learn" button which can be found beneath the
setting knob. This forces the
thermostat to transmit its unique
identity for up to five minutes. Do not at this stage replace the
setling knob.
4.
Move to the RX receiver and press and hold CH1 and PROG
button until green LED flashes.
5.
The thermostat selting dial may now be replaced and the controls
tested in the normal way to ensure lhat boiler, pump and
associated
control valve@) operate in the correct sequence.
6.
Having tested fhe conbds, the thermostat should be set to the
required temperature, this can be read directly from the LCD
display as
the
selting knob is moved.
B,
1
PROG
CHI
sensor
0
I
Cable Specification : minimum cross section 0.5mm2
Important note: Please ensure that when posltmnlng the thermostat settlng unlt that
there are
no
large metal obstruct~ons, 8e cyltnder or bo~ler case, s~lttng In between the
thermostat and the
RX
reccver unit as these
will
block rad~o comrnunlcatton and
prevent the
lherrnostat from operat~ng correclly
User Instructions
To alter the temperature that the thermostat controls at simply turn
the setting dial on the thermostat. As the setting dial is moved the
small LCD display will show the selected temperature.
Once the required temperature is set, the LCD display will show the
temperature of the water in the cylinder close to the position where
the sensor is located.
A small "Flame
"
icon is lit in the display whenever the thermostat is
calling for heat. Please note that the boiler will only run when both
the thermostat and the time control are calling.
The CET B-RF is battery powered.
Baneries will last in excess of
two
years. A'Banery" icon will flash in the display when baneries need to
be changed. To change the batteries loosen the two screws on
the
base of the thermostat and lift thermostat off base plate. Batteries
are located in the rear of the thermostat unit and should be replaced
using two high quality
AA
size alkaline cells.
Danfoss Randall Ltd
Arnplh~ll Road, Bedford MK42 9ER
Tel 01234 364621
Fax 01234 219705
Ernall danfossrandalI@danfoss corn
Webslle
www
danfoss-randall co
uk
1.
low
'*lIag~
D#rect#vp
1
3
8,
'.
,
Part
No
25317
Iss.1
03/04
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