Takagi AT-D3U-OS User Manual

33 Page
7. Between the “CHILD-2” and the “CHILD-3” units:
Connect the “2” connector of the “CHILD-2” unit to the “1” connector of the “CHILD-3” unit.
8. Verify that all cables are connected like the diagram (B).
9. Turn on power to the “PARENT” unit.
Next, turn on “CHILD-1”. When the controller* installed in “CHILD-1” unit displays a number, turn on
“CHILD-2”.
When the controller* installed in the “CHILD-2” unit displays a number, turn on “CHILD-3”.
Make sure the controller* installed in each child unit displays each unit number. (Refer to p. 48.)
The numbering system automatically allocates the unit number to each water heater in the Easy-Link
System, in accordance with the table on the right.
10. Set the water temperature using the controller* installed
in the “PARENT” unit. It will set the temperature for the
Easy-Link System. If a remote controller is installed to the
“PARENT” heater of 510 U Indoor (AT-D3U-IN), it will over-
ride the built-in controller.
*Built-in controller for indoor models, remote controller for outdoor models.
(A) 510U (AT-D3U-IN/OS) model Computer board
To change the DIP switch
settings for the Easy-Link
System, locate the bank of
DIP switches at the bottom
left of the computer board.
Do not adjust the upper
bank of DIP switches.
Easy-Link /
Mul-Unit
connectors
are next to
the computer
board.
Lower bank of DIP switches
Upper bank of DIP switches
(B) Basic diagram of connections between the Easy-Link System units
NOTE: The dark square indicates the correct DIP switch position.
PARENT
Communicaon cable
Lower bank of
DIP switches
OFF
ON
1
1
1
12
2
2
2
PARENT PARENT PARENT
1
2
3
4
5
6
1
2
3
4
5
6
OFF
ON
OFF
ON
1
2
3
4
5
6
OFF
ON
1
2
3
4
5
6
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
Connectors Connectors Connectors Connectors
PARENT unit
CHILD-1 unit CHILD-3 unit
CHILD-2 unit
Remote controller
Installaon
Installaon Manual
 A remote controller is not required for an Easy-Link System. However, it does
provide for more temperature options and ease of maintenance.
 If a remote controller is used, the temperature on all units in the system will
automatically be set to the same temperature that is set on the remote.
NOTICE
Type of unit Unit # of easy-link
Parent 1
Child 2, 3, or 4

Takagi AT-D3U-OS Specifications

General

Brand	Takagi
Model	AT-D3U-OS
Category	Water Heater
Language	English