Danfoss RX1-S, CS2 Installation Manual

CET2000B-RF + RX1-S + CS2

Wireless Electronic Hot Water Cylinder Thermostat

Installation Guide

Danfoss Heating

CET2000BRF

2

For a large print version of these instructions

please call Marketing on 0845 121 7400.

Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other
printed material. All trademarks in this material are property of the respective companies.
Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Hearby, Danfoss A/S declares that the radio equipment type CET2000B-RF + RX1-S is in
compliance with directive 2014/53/EU.
The full text of the EU declaration of conformity is available at the following internet
address, http://heating.danfoss.co.uk/xdoccat/14_CATC-J_MNU17497125_SIT313.html

Danfoss Heating

3

Product Specications

CET2000B-RF RX1-S

Operating Voltage

2.5 – 3 VDC

(2xAA alkaline batteries)

230Vac 50Hz

Output Relay - 1 x SPDT Type 1B
Switch rating - 3A (1) at 230Vac
Output - Volt free
Setting temp. range 40-65°C ­Maximum ambient temp. 0-45°C
Battery lifetime 2 years ­Max. range 30 metres
Operating frequency 433.92MHz <1mW ERP
IP Rating IP20 IP40
Control On-O
Operating mode Domestic Hot Water Heating
Construction EN 60730-2-9 EN 60730-1
Control pollution situation Degree 2
Rated impulse voltage - 2.5kV
Ball pressure test 75°C
Dimensions H84 x W84 x D35 H84 x W84 x D28
Software classication A

Important note RF products: Ensure that there are no large metal objects, such as
boiler cases or other large appliances, in line of sight between the transmitter and
receiver as these will prevent communication between thermostat and receiver.

CET2000B-RF

4

1. The clamp on sensor should
be mounted onto the
cylinder wall at a height
equivalent to ½ 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.

This product should only be installed by a qualied
electrician or competent heating installer, and must be
in accordance with local wiring regulations.

1/2 c

ylinder

height

For insulation thicker than 25mm
and up to 55mm thick, use the
extra cover supplied as a spacer to
ensure that the sensor is held in
firm contact with the cylinder wall.

!

Installation

Danfoss Heating

5

2. Before attaching the sensor to the cylinder using the strap
provided, connect a 2-core cable to the sensor to allow
interconnection to the thermostat setting unit.

3. 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 that have

thick insulation (see page 6).

4. Mount the thermostat wallplate on to a wall next to the
cylinder. Connect the cable from the sensor to terminals 1
& 2 of the wallplate (see wiring diagram on page 7).

5. Now mount the thermostat setting unit onto the wallplate
(see diagrams on page 9).

CET2000B-RF

6

For insulation thicker than 25mm
and up to 55mm thick, use the
extra cover supplied as a spacer to
ensure that the sensor is held in
rm contact with the cylinder wall.

Danfoss Heating

7

Sensor Wiring

CS2

sensor

1 2 3

CET2000B-RF

Cable specication: minimum cross section 0.5mm

2

CET2000B-RF

8

Installation - RX1-S Receiver unit

ELECTRONICS

N

L

N

L

2

3

4

COM

ON

OFF

230Vac

1

Please Note: This product should only be installed by a
qualied electrician or competent heating installer, and must
be in accordance with local wiring regulations.

Danfoss Heating

9

Mounting - CET2000B-RF

CET2000B-RF

10

Hard Wired Heating with Wireless Hot Water
Control, 3 Port Mid-Position Valve

ELECTRONICS

N

L

1

2

3

ELECTRONICS

N

L

2

HTG OFF

3

HW ON

4

HTG ON

230Vac

1

HW OFF

RET1000MS

Room Thermostat

RX1-S Receiver -

paired to CET2000B-RF

FP715 Programmer

3 Port Mid-Position Valve

FP715 Programmer

Boiler

Pump

N

L

2

blue

brown/

white

orange

grey

N L

N L

SW.L

Danfoss Heating

11

Wireless Heating and Hot Water Control,
using 2 x 2 Port Valves

ELECTRONICS

N

L

1

2

3

ELECTRONICS

N

L

2

HTG OFF

3

HW ON

4

HTG ON

230Vac

1

HW OFF

RX1-S Receiver -

paired to CET2000B-RF

FP715 Programmer

Hot Water 2 Port Valve

FP715 Programmer

Pump

Heating 2 Port Valve

blue

brown

orange

grey

N L

blue

brown

orange

grey

ELECTRONICS

N

L

1

2

3

RX1-S Receiver -

paired to RET2000B-RF

Boiler

N L

Sw.L

CET2000B-RF

12

Hard Wired Heating with Wireless Hot Water
Control, 2 x 2 Port Valves

ELECTRONICS

N

L

1

2

3

ELECTRONICS

N

L

2

HTG OFF

3

HW ON

4

HTG ON

230Vac

1

HW OFF

RET1000MS

Room Thermostat

RX1-S Receiver -

paired to CET2000B-RF

FP715 Programmer

Hot Water 2 Port Valve

FP715 Programmer

Pump

Heating 2 Port Valve

N

L

2

blue

brown

orange

grey

N L

blue

brown

orange

grey

Boiler

N L

Sw.L

Danfoss Heating

13

Wireless Heating & Hot Water Control, with
3 Port Mid Position Valve

ELECTRONICS

N

L

1

2

3

ELECTRONICS

N

L

2

HTG OFF

3

HW ON

4

HTG ON

230Vac

1

HW OFF

RX1-S Receiver -

paired to CET2000B-RF

FP715 Programmer

3 Port Mid-Position Valve

FP715 Programmer

Pump

blue

brown/

white

orange

grey

N L

ELECTRONICS

N

L

1

2

3

RX1-S Receiver -

paired to RET2000B-RF

Boiler

N L

Sw.L

CET2000B-RF

14

Key Lock

Slide the DIL switches
to the settings required.

1

2

3

4

NOT USED

NOT USED

NOT USED

KEYS UNLOCKED

NOT USED

NOT USED

NOT USED

KEYS LOCKED

To avoid unwanted tampering of the required hot water tem­perature the CET2000B-RF includes a key lock feature which
disables the Λ and V buttons.

First set the required hot water temperature using the Λ or V
button. Then slide internal DIL switch 4 to the locked posi­tion and mount the CET2000B-RF back on its wallplate (as
shown on page 9).

Danfoss Heating

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If the thermostat CET2000B-RF and receiver RX1-S have been
supplied together in a combined pack, the units have been
paired in the factory and no commissioning is required. If the
thermostat and receiver have been supplied separately follow
the steps below to pair the devices.

Step 1 RX1-S - Ensure RX1-S is wired in accordance with
instructions on page 8.

Step 2 CET2000B-RF - Insert 2xAA alkaline batteries. If the
CET2000B-RF is not already paired to the RX1-S it will enter it’s
learning mode shown by the ashing aerial icon.

Step 3 RX1-S - Press and hold down both the PROG and CH
buttons. The PROG LED will light for 1 second when it has
paired with the CET2000B-RF. Release buttons

A steady aerial icon on CET2000B-RF conrms that the devices
are now paired and ready for control of your domestic hot water
system.

Commissioning

Part No 44101v01 04/15

Danfoss Ltd

Ampthill Road
Bedford MK42 9ER

Tel: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.heating.danfoss.co.uk

VIAGD102