
4
2. Installation Instructions of LonWorks Interface
Safety Precautions
∗The following is intended for the installer responsible for
installation and test operations of the LonWorks Interface,
and should be carefully read before beginning.
∗The precautions given in this manual consist of specific
“Warnings” and “Cautions.” They provide important
safety-related information and are important for your safety,
the safety of others, and trouble-free operation of the
system. Be sure to strictly observe all safety procedures.
The labels and their meanings are as described below.
Warning
This symbol refers to a hazard or unsafe
procedure or practice which can result
in severe personal injury or death.
Caution
This symbol refers to a hazard or unsafe
procedure or practice which can result
in personal injury or product or property
damage.
※
After installation is completed, perform a test run to check
for operating trouble. As you do, use the central control
device Operating Instructions and explain operating
procedures to the customer. Then request that the customer
store this manual together with the central control device
Operating Instructions.
Warning
• Be sure to arrange installation from the dealer where the
system was purchased or using a professional installer.
Electric shock or fire may result if an inexperienced
person performs any installation or wiring procedures
incorrectly.
•
Please install and ensure construction according to Installation
Instructions of LonWorks Interface.
•
Only a qualified electrician should attempt to connect this
system, in accordance with the instructions in this manual.
If the electrical circuit capacity is insufficient a danger of
electric shock and fire may be present.
•
Use the specified cables (type and wiring diameter) for the
electrical connections, and connect the cables securely.
Run and fasten the cables securely so that external forces
or pressure placed on the cables will not be transmitted to
the connection terminals. Overheating or fire may result if
connections or attachments are not secure.
Caution
Depending on the installation conditions and location, an earth
leakage breaker may be required. If an earth-leakage breaker
is not installed, there is a danger of electric shock or fire.
Included Parts
No. Part Qty
(1)
Installation Instructions
1
Installation Method
• The screws used to install the main unit must be provided by
the installer.
• Install the LonWorks Interface away from any sources of
electrical noise.
Wiring Specifications
•
For the inter-unit control wiring use twin-core AWG#20 –
AWG#14 cables.
• For the LonWorks communication line cables, use twisted-
pair cables with a wire diameter of 0.51 mm(AWG#24) or
larger as recommended by Echelon Corp.
Examples of cables recommended by Echelon Corp.
Cable type Wire diameter
/AWG
Total cable length
Bus type Free
24 AMG twisted-pair
(TIA568A category 5)
0.51 mm
/24
900 m
(2953 ft.)
450 m
(1476 ft.)
•
Do not use the same cable for the inter-unit control wiring, the
LonWorks communication lines, and the power cable. Do not
run them through the same conduit or place the cables near
one another.
• Connect the cables so that there is no miswiring.
(Miswiring can cause malfunction.)
LonWorks Interface Structure
•
This interface contains 4 LonWorks communication boards (nodes).
• Up to 4 indoor unit groups (maximum 32 units) can be
assigned to 1 node.
Main circuit
board Node 3
Main circuit
board Node 2
Main circuit
board Node 1
Main circuit
board Node 0
Power
board Power transformer
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