Easy-Link Connections With Previous Models - A.O. Smith T-H3J-DV Service Manual

12-12. Easy-Link connections with previous models

The 540 (T-H3) can be connected with the previous models ; 520 (T-H2).
A. DIPswitch setting on the computer board of the 540 (T-H3)
If a Easy-link system contains a 520 (T-H2), change DIPswitch No.6 on the lower
bank all of the 540 (T-H3) computer board to the "ON" position.
CAUTION
B. Basic diagram of connections between the Easy-Link system units
*The previous models indicates a 520 (T-H2).
Example of correct connections
Case 1
540
Previous
(T-H3)
models*
Temperature remote controller :
9008172005 (TM-RE40)
Case 3
Previous
540
models*
(T-H3)
Temperature remote controller :
9007603005 (TM-RE30)
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
1 2 3 4 5 6 2 3 4 5
ON
OFF
The dark square is the direction the DIPswitch should be set to.
Previous Previous
models*
models*
Previous 540
models*
(T-H3)
76
DIPswitch setting on the 540 (T-H3)
(Lower bank of DIPswitches)
Case 2
Previous
Previous
models*
models*
Temperature remote controller :
9007603005 (TM-RE30)
Page
CONFIDENTIAL
Ver. 1.00
Previous
540
models*
(T-H3)