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2. Select one unit to be the “PARENT” unit.
3. “PARENT” unit :
Locate the two banks of DIPswitches at the bottom left of the computer board of the unit that you
select to be the “PARENT” unit. Change DIPswitch No. 1 on the lower bank of DIPswitches to the
ON position. See the computer board diagram below. Do not change any DIPswitches on any of the
“CHILD” units.
4. Between the “PARENT” and the “CHILD-1” units :
Connect the “PARENT” connector of the “PARENT” unit to the “1” connector of the “CHILD-1” unit.
5. Between the “CHILD-1” and the “CHILD-2” units :
Connect the “2” connector of the “CHILD-1” unit to the “1” connector of the “CHILD-2” unit.
6. 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.
7. Make sure the remote controller and/or temperature controller display the unit #. The numbering
system automatically allocates the unit # to each water heater in the Easy-Link System, in accordance
with the table below.
(A) 540 (T-H3) model computer board
(B) Basic diagram of connections between the Easy-Link System units
Installaon
Installaon Manual
NOTE: The dark squares indicate the direction the DIPswitches should be set to.
Type of unit Unit # of easy-link
Parent 1
Child 2, 3, or 4
To change the DIPswitch
settings for the Easy-Link
System, locate the bank of
DIPswitches at the bottom
left of the computer board.
Do not adjust the upper
bank of DIPswitches.
PARENT
Lower bank of DIPswitches
Upper bank of DIPswitches
Easy-Link /
Mul-Unit
connectors
are next to
the computer
board.
Temperature controller
or
Remotecontroller
PARENTunit CHILD-1 unit
CHILD-2 unit CHILD-3 unit
PARENT
Communicaon cable
Connectors
Lower bank of
DIPswitches
OFF
ON
1
1
1
12
2
2
2
PARENT
PARENT
PARENT
1
2
3
4
5
6
Connectors Connectors Connectors
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
DIPswitches
Lower bank of
DIPswitches
Lower bank of
DIPswitches
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