Pentax CM900 Installation Manual
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42011076-003
CM900 RF INSTALLATION GUIDE (UK - English)
0024168 08/06
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CM900 RF
Installation Guide
CM900 Wireless
Installation Guide
CM927 / CM921 Wireless Programmable
Room Thermostat & HC60NG Receiver Box
Description
The Honeywell CM900 Wireless (CM927 or
CM921) is a modern wireless programmable
room thermostat based on Honeywell’s proven
programming philosophy. To further improve the
ease of use, this product includes an extra large
LCD display with backlighting and LoT Technology
to assist customers during daily use.
The CM927/921 room thermostat communicates
with the HC60NG receiver box on an 868MHz Radio
Frequency (RF) band to control a single heating
system component such as a boiler, pump or
zone valve. Neither product will communicate with
other RF products that use different frequencies or
communication protocols.
Note: The RF link between the individual
room thermostat (CM927/921) and receiver
box (HC60NG) in system packs provided by
Honeywell is pre-configured at the factory and
therefore SHOULD be installed at the same site.
This makes the installation process fast and easy,
but if products from individual 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 Receiver Box .............................. 3
2.2 Installing the Room Thermostat ........................ 4
2.2.1 Power Up ............................................... 4
2.2.2 RF Communication Check ........................ 4
2.2.3 Locating the Room Thermostat ................. 5
2.3 System Check................................................ 5
3) Basic Operation of the System ..................... 6
3.1 Automatic Operation ....................................... 6
3.2 Temporary Manual Override ............................. 6
3.3 Communication Loss ...................................... 6
4) Installer Mode ................................................. 6
4.1 Entering Installer Mode ................................... 7
4.2 HC60NG Receiver Box Fail-Safe Mode Setup .... 7
4.3 Using the Room Thermostat for Specific Applications
.. 8
4.4 Using the Special Features of the Room Thermostat
.. 8
4.5 Installer Parameters Table ............................... 9
4.5.1 Category 1 - Room Thermostat Settings ..... 9
4.5.2 Category 2 - System Settings .................. 10
5) Additional Installation Information ............. 11
5.1 Binding / Rebinding Procedure ...................... 11
5.2 Multi-Zone System ........................................ 11
6) Trouble Shooting .......................................... 12
6.1 Trouble Shooting Guide ................................. 12
6.2 Diagnostics Mode ........................................ 12
42011076-003 R2
CM900 Wireless - Programmable Room Thermostat
1) Installation Information
As these products communicate using RF technology special care must be taken during installation. The
location of the RF components as well as the building structure may influence performance of the RF
system. To assure system reliability, please review and apply the information given below.
Within a typical residential building the two products should communicate reliably within a 30m range. It
is important to take into consideration that walls and ceilings will reduce the RF signal. The strength of the
RF signal reaching the receiver 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 for the room thermostat this can be checked using the RF Communication
Test mode as described in section 2.2.3 Locating the Room Thermostat. If the position is unsuitable the
receiver box will not respond and an alternative position must be selected.
Typical example of Building Fabric Signal losses
Wall Wall Wall
Ceiling
Max. Signal Length 30 metres
= Signal Strength
Installation Guide
2) Installing the CM900 Wireless System
Please follow the illustrations and information below in sequence to install the receiver 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 Receiver Box
1
The receiver 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.
NOTE: The receiver box contains no user serviceable parts. It should be
opened and installed by qualified installer only.
WARNING: Electrostatic sensitive 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 receiver box wiring label)
1.5-2.5mm²
a. Burner (direct control) b. Combi boiler
c. Zone valve d. Cooling device
2 3
7
4
> 7mm Ø
< 7mm Ø
5
a. b.
6
6mm max.
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