Install Instructions

25 Page
EASY-LINK SYSTEM
(Available on the 510U (T-D2U) model only)
The 510U (T-D2U) model water heaters can be connected with other allowable heaters (see the
table below) with communication cables to work as a multiple-unit manifold system.
• The Easy-Link System allows up to 4 units to manifold together.
• A communication cable (gray color) comes with each 510U (T-D2U) model.
You can manifold from 2 to 4 units without the need for a multi-unit controller. A 4-unit system
has full automatic modulation between 15,000 BTU/h and 796,000 BTU/h.
-Easy-Link Connecon Procedures-
1. Make sure the power to the heaters are off.
2. Verify the DIPswitch set temperatures of all units within the system. Every single water heater must
be set to the same set temperature. If an TM-RE42 remote controller is used, it should be installed to
the “PARENT” unit. The remote will set the temperature for the entire system.
3. Select one unit to be the “PARENT” unit. The “PARENT” unit should be one of the end units.
4. “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 as shown in the next page. Do not change any DIPswitches
on any of the “CHILD” units.
• The Easy-Link System is limited up to 4 units. If you connect more than 4
units, only the first 4 units will work as a part of the Easy-Link System. The
other additional units will not work.
• Only listed models on the table above can be combined together as an
Easy-Link System. These models cannot be combined together with other
models not listed on the table above.
CAUTION
-General-
Installaon
Installaon Manual
OFF
ON
1
2
3
4
5
6
2
3
4
5
The dark square is the direction the DIPswitch should be set to.
DIPswitch setting on the 510U (T-D2U)
(Lower bank of DIPswitches)
Gas In
Hot Out
Cold In
Easy-Link connection
with allowable heaters
T-K3
T-K3-Pro
510 model (T-D2-IN / T-D2-OS)
510U model (T-D2U-IN / T-D2U-OS)*
*If the 510U (T-D2U) models are incorporated in an Easy-Link Sytem with the other models in the table
above, change DIPswitch No.6 on the lower bank of all the 510U (T-D2U) computer boards to the “ON”
position.