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Installation Guide

3

2) Installing the CM900 Wireless System

Please  follow  the  illustrations  and  information  below  in  sequence  to  install  the  Relay  Box  and  room 

thermostat correctly. For applications other than gas boilers, enabling special features and to see what 

other system options are available refer to section 

4) Installer Mode

.

2.1 Installing the Relay Box

1

The Relay Box is a RF device. For the 

best performance install in an open 

space. Leave at least 30cm distance 

from any metal objects including wall 

boxes and boiler housing.

Do not mount on metal wall boxes.

EMC compliance considerations

Keep  AC  mains  supply/load  cables 

separate from signal wiring.
Refer to Code of Practice standards 

EN61000-5-1 and -2 for guidance.

NOTE:

 The Relay Box contains 

no  user  serviceable  parts.  It 

should be opened and installed 

by qualified installer only.

WARNING:

  Electrostatic  sensi-

tive  device!  Do  not  touch  the 

circuit board.

NOTE:

 All wiring must be in accordance with IEE regulations

CAUTION:

  Observe  ambient  temperature  and  current  limits 

(see the Relay Box wiring label)

Burner (direct control)

Zone valve

Cooling device

2

3

4

< 7mm Ø

> 7mm Ø

a.

b.

6

5

1.5-2.5mm²

6mm max.

Combi boiler

230V

50-60Hz

<5A

BDR91

A-B:5(3)A

A-C:5(3)A

BDR91

A-B:5(3)A

A-C:5(3)A

230V

50-60Hz

<5A

V4043H

BDR91

A-B:5(3)A

A-C:5(3)A

230V

50-60Hz

<5A

BDR91

A-B:5(3)A

A-C:5(3)A

230V

50-60Hz

<5A

M

3.5

N

o

6

1

2

2

1

Summary of Contents for BDR91

Page 1: ...ual system packs are separated or mixed with other pre configured system packs during installations please refer to section 5 1 Binding Rebinding Procedure to bind the desired units together and allow them to communicate with each other Table of Contents Section Page 1 Installation Information 2 2 Installing the CM900 Wireless System 3 2 1 Installing the Relay Box 3 2 2 Installing the Room Thermos...

Page 2: ... strength of the RF signal reaching the Relay Box depends on the number of walls and ceilings separating it from the room thermostat as well as the building construction the diagram below illustrates an example of typical signal strength reduction Walls and ceilings reinforced with steel or plasterboard walls lined with metal foil reduce the RF signal significantly more Once a position is selected...

Page 3: ...iance considerations Keep AC mains supply load cables separate from signal wiring Refer to Code of Practice standards EN61000 5 1 and 2 for guidance NOTE The Relay Box contains no user serviceable parts It should be opened and installed by qualified installer only WARNING Electrostatic sensi tive device Do not touch the circuit board NOTE All wiring must be in accordance with IEE regulations CAUTI...

Page 4: ...he green button to confirm 2 2 2 RF Communication Check Test Mode To check the RF communication hold the room thermostat about 2 3 metres from the installed Relay Box Move the slider on the room thermostat to the OFF position then press the and buttons together with the button for 3 seconds The unit will display TEST TRANSMIT and it will send test signals to the Relay Box flashing the green LED on...

Page 5: ...der switch to the MAN mode 4 Adjust the setpoint up to the maximum 35 C by pressing the button The boiler should come on green LED ON on Relay Box after a few seconds and the symbol appears on the room thermostat LCD display 5 Set the slider switch to the OFF mode The boiler will go off green LED OFF on Relay Box after a few seconds and the symbol disappears 6 Check the system operation by moving ...

Page 6: ...iod of 1 hour the red LED will illuminate to indicate that no RF messages have been received during the last hour The Relay Box will also enter the failsafe mode as selected in Installer Mode see section 4 2 BDR91 Relay Box Fail Safe Mode Setup To allow manual control of the Relay Box output manual override is available in fail safe mode When RF communication is restored the Relay Box will automat...

Page 7: ...o accept the change 6 Attach appropriate label to the Relay Box to indicate the selected fail safe mode IMPORTANT To enable the frost protection when RF communication is lost select the fail safe mode 1 For systems with separate frost protection thermostat or where frost protection is not required select fail safe mode 0 Move the slider switch to the OFF mode Press and hold the button and the two ...

Page 8: ...ature is factory enabled To enable Set parameter 3 tC category 1 to 1 Temperature Offset If the thermostat is located in a particularly hot cold location for reliable signal transmission reasons then the measured displayed temperature can be adjusted by 3 C This is useful if the homeowner wants the reading to match another appliance temperature display Set parameter 12 tO category 1 to the require...

Page 9: ...grammed To restore the factory profile set to 1 Auto Summer Winter Time Change 3 tC 1 Auto Summer Winter Time Change Enabled 0 Auto Summer Winter Time Change Disabled LCD Backlighting 5 bL 1 Backlighting Enable 0 Backlighting Disabled Upper Temp Limit 6 uL 35 35 C Upper Temp Limit 21 to 34 21 C to 34 C adjustment in 1 C steps Lower Temp Limit 7 LL 5 5 C Lower Temp Limit 5 to 21 6 C to 21 C adjustm...

Page 10: ...ed 1 Pump exercise enabled System Synchronisation 6 Sn 0 Standard operation of the Room Unit 1 Room unit configured as Synchroniser Loss of Communications Instruction 7 LC 0 Relay Off 1 Relay 20 on 80 off The following Parameters are for the control of other Honeywell Wireless products such as Wireless Underfloor Heating controls and Wireless Radiator controls For more information please contact H...

Page 11: ... systems and the CM927 921 room thermostat is compatible with a variety of other Honeywell products including HR80 radiator controllers see below and HCE80 underfloor heating controllers If you intend to use it in this way additional installation and user instructions can be obtained by contacting the address at the end of this guide NOTE Some of the labels supplied with the pack are for use in mu...

Page 12: ... LED is on and the green one is flashing once every 3 sec on the Relay Box Incorrect or incomplete binding procedure Incorrect position of the room thermostat during binding Repeat the binding procedure Repeat the binding procedure keeping approx 1 m distance between the Relay Box and the room thermostat The red LED on the Relay Box is illuminated Communication loss The Relay Box receives no RF me...

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