Installation Sheet

27 Page
EASY-LINK SYSTEM
Thewaterheatercanbeconnectedwithotherheatersofthesame modelwithcommunicationcablesto
workasamultiplemanifoldsystem.
• TheEasy-LinkSystemcanconnectupto4units.
• Acommunicationcable(graycolor)comeswitheachunit.Thecablesuse18gagewireandcanbeup
to250ft(76.2m)longalltogether.
Youcanmanifoldfrom2unitsto4unitswithoutamulti-unitcontroller.A4-unitsystemhasfullautomatic
modulationbetween15,000BTU/hand1,520,000BTU/h.
Gas In
Hot Out
Cold In
 The Easy-Link System is limited to 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.
 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 the units in the system will auto-
matically be set to the same temperature that is set on the remote.
 When a remote is used in an Easy-Link System, it must be connected to the parent unit.
NOTICE
-Easy-Link Connecon Procedures-
1. Make sure the power to the heaters is turned off.
2. Verify the DIP switch set temperatures of all units within the system. Every water heater must be set
to the same set temperature. If an optional remote controller 100112155 (TM-RE30) is used, it shall
be installed to the PARENT unit. (See the diagram on the naxt page.) The remote will set the tem-
perature 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 lower bank of DIP switches at the bottom left of the center computer board. Change DIP
switch No. 8 on the lower bank of DIP switches to the ON position. See the computer board diagram
shown on the next page. Do not change any DIP switches on any of the CHILD units.
5. 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 using the
supplied linking cable.
6. 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.
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. When the 7-seg. LED of the center computer board of the PARENT
unit displays a number, turn on CHILD-1. When the 7-seg. LED of the center computer board of the
CHILD-1 unit displays a number, turn on CHILD-2. When the 7-seg. LED of the center computer board
of the CHILD-2 unit displays a number, turn on CHILD-3. Make sure the 7-seg. LEDs of all the center
computer board of each unit displays each unit number. The numbering system automatically allo-
cates the unit number to each water heater in the Easy-
Link System, in accordance with the table shown below.
10. Set the desired temperature on the controller attached
to the PARENT unit. If a controller is not installed, set
the temperature DIP switches on each heater as shown
in the table located at the bottom of page 38.
Installaon
Installaon Manual
Type of unit Unit # of easy-link
Parent 1
Child 2, 3, or 4