49
iN401 - iN501 Connecting
Multiple
Units
May
2019
-
Revision
00
10. Open the front door and locate the main circuit boards.
iN401/iN501 have 2 Circuit Boards.
11. Connect the included communication cable from an
open jack on the circuit board in one unit to an open
jack in the next unit. Repeat this step as required by the
number of water heaters being connected.
12. On the first water heater, locate DIP Switch 3 on circuit
board 1. Position the switch in the ON position (left) as
shown in the table below.
13. Position all other switches on the circuit boards in the
unit to the OFF position (right).
14. On any water heater unit between the first and last unit,
Unit 2 and/or Unit 3, position all DIP SW3 switches in
the OFF position (right).
15. On the last water heater, locate DIP Switch 3 as shown
in the table below.
16. Once the communication cables are routed and
connected and the DIP switches are correctly positioned,
close and lock the front door.
17. Reconnect the power and turn the water heater ON.
The water heaters, should now be ready to communicate
with each other and operate as a single system.
Note:
Whenever a change is made to any one water heater,
all the other units in the system will be automatically
updated to the new settings.
Cascade Termination DIP Switch 3 Setting (Single Unit)
Model
Board 1
Board 2
iN401 / iN501
ON
OFF
Cascade Termination DIP Switch 3 Setting (Multiple Units)
Model
Board 1
Board
2
iN401 / iN501
Unit
1
ON
OFF
Unit
2
or
3
OFF
OFF
Last unit
OFF
ON
13.2.1 telliCare for Multiple Units
If cascading multiple units, the
cellular
module on all units
besides “Unit 1” in the sequence need to be disconnected to
make room for cascade communication cables. Remove the
attached cable at each end from the referenced jacks and
set aside.
13.3 Venting for Multiple Units
When venting for multiple units the following screens will
appear.
