Danfoss GET B-RF Guide

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
measurescylinder temperature usinga strap-on temperaturnsensor
fitted tothe cylinder wall andwired tothe thermostat which is
normanylocated adjacent to the cylinder. To avoid the need for
wiring, communication between the thermostat and the boiler or zone
valve isachieved using secure
RF wireless communication. A
receiver unit, type RX-1 is mountedadjacent 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 accordancewith
the current edition of the IEEE wiring
regulations.
2.
The clamponsensor should be mountedonto the cylinder wal at a
height equivalentto % the heightof the cylinder. Care should be
taken to removeany insulationmaterial from the cylinder and to
ensurethat the copper surface of the cylinder isclean. See diagram
opposite for details.
3. Beforeattaching the sensor to the cylinder usingthe strap provided.
a 2-corecable 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
pieceis providedfor use with cylinders having thick insulation.
5. Mount the wallplateof the thermostat selting unit on loa 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 mountedonto the wallplate
and securedusingthe lwo screws on the bottom of the wallplate.
RX1 Receivar unit
1. The product should installedby a competentperson. lnstallation
must be in accordance with the currentedition of the IEEE wiring
regulalions.
2. Mount the RX-1 wallplateonto the wan, cable access must be from
behindor below the wallplate.A typical wiring diagramshowing the
inlerconnectionsbetween time controls and zone valve is shown
opposite.
3. The RX-1 may now bemounted onto the wanplate andsecured
using the lwo screws on the bottomof the wallplate.
2 x AA/LR6/MN1500alkaline baneries
30 metres line of sight
mperaturerange:
(W.H, D) 85 x 86 x 42
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, . .".Mu*".-
!*?.-.- - .. .,
- . -.
,
I Palrina Thermostat to Receiver
1. Ensurethat 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. Removethe knob from the thermostat adpress and holdfor 3
secondsthe 'Learn" buttonwhich can befound beneaththe
settingknob. This forces the thermostat to transmit its unique
identityfor up to five minutes. Do not at this stage replace the
setling knob.
4. Move to the RX receiver and pressand hold CH1 and PROG
button untilgreenLEDflashes.
5. The thermostat seltingdial may now be replacedand the controls
tested inthe normalway to ensure lhat boiler, pump and
associatedcontrolvalve@)operate inthe correct sequence.
6. Havingtested fhe conbds, the thermostat should be set to the
requiredtemperature,this can be readdirectly from the LCD
display as
the seltingknobis moved.
B, 1
PROG CHI
sensor
0
I Cable Specification : minimum cross section 0.5mm2
Importantnote: Pleaseensure that when posltmnlngthe thermostatsettlng unlt that
there are no largemetalobstruct~ons,8e cyltnderor bo~lercase,s~lttngIn between the
thermostat and the RX reccver unit as these will block rad~ocomrnunlcattonand
preventthe lherrnostat fromoperat~ngcorreclly

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 islit inthe 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~llRoad, Bedford MK42 9ER
Tel [phone]
Fax [phone]
Ernall danfossrandalI@danfoss corn
Webslle www danfoss-randallco uk
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1 3 8, '. ,
Part No 25317 Iss.1 03/04