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Honeywell CM721 Manual

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Installation Guide 3
2) Installing the CM700 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
= M3.5
=
N
o
6
1
2
2
1
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
3 …


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  • Green light on red light flashing box next to boiler why .
    Thank youb Submitted on 6-4-2022 at 21:00

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