Installation Guide

26 Page
 The parent/child DIP switch, No.1 on the lower bank of DIP switches, should be in the OFF
position.
 This is the connection diagram for a 510C model and a multi-unit controller for 2 to 20 water
heaters. The example above shows seven water heaters.
 The multi-unit controller automatically allocates the unit # (1-20) to each water heater that is
part of the Multi-Unit System.
 In a Multi-Unit System, connect the “[1]” connector and the “[2]” connector with the
communication cable (refer to p. 9) or 18 gauge wire cables. The total cable length can be up
to 250 ft (76.2 m) long.
 The multi-unit controller allocates random numbering. See the controller instructions to
learn how to renumber the system units sequentially.
Installaon
Installaon Manual
100112691
(TM-MC02)
510C
Cold IN
Hot Out
MULTI-UNIT SYSTEM
Multiple 510C models can be combined for a Multi-Unit System, along with the multi-unit controller
(Part 100112691 (TM-MC02)). Each multi-unit/remote controller set can control from 2 to 20
units for commercial or residential applications. For a 20-unit system, the computer can modulate
between the usages of 15,000 BTU/h to 3.98 million BTU/h.
An individual cut-off switch is recommended
for each unit in a Multi-Unit System for the
purpose of maintenance.
Multi-Unit System connection diagram
Multi-unit controller and temperature remote controller wiring:
OFF
ON
1 1
1
2 2
2
PARENT
PARENT
PARENT
1
2
3
4
5
6
Connectors Connectors Connectors
OFF
ON
OFF
ON
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
Lower bank of
DIP switches
1
2
3
4
5
6
1
2
3
4
5
6
Communicaon cable
Communicaon cable
Communicaon cable
Communicaon cable
Remote controller cable
1
1
2 2
PARENT
PARENT
Connectors Connectors
OFF
ON
OFF
ON
1
2
3
4
5
6
1
2
3
4
5
6
1
1
2 2
PARENT
PARENT
Connectors Connectors
OFF
ON
OFF
ON
1
2
3
4
5
6
1
2
3
4
5
6
Remote controller
100112691
(TM-MC02)
Terminals for
water heaters
Remote
controller
terminals
Example : 510C model x 7 units
For detailed instructions on the multi-unit controller, refer to the
instructions that are packaged with the multi-unit controller.
NOTICE