Rinnai Rice Cooker MSB-C1 Installation Manual
U306-1032(00)
Connecting Multiple MSB-M Units
070 00012 32069 4
Manifold Electronic Control System
Installation Instructions
MSB-C2
Note:
Up to 5 water heaters can be connected together using
•
the MSB-M and MSB-C1 kits.
•
When over 5 water heaters are connected together,
MSB-M units are connected using MSB-C2 kits.
•
If multiple MSB-M are used, then at least three water heaters
should be connected to each MSB-M.
Ex: With 7 water heaters, one MSB-M should control 4 water
heaters and the other MSB-M should control 3 water heaters.
United States & Canada: For use with Rinnai Tankless Water
•
Heaters (except for models V53e, V53i and R63LSe which must
use pressure activation valves, PVA).
Please contact Rinnai if you have further questions on the
•
applicable water heater models.
1) On the master MSB, one connector
is connected to the terminal connector
and the other one is connected to the
MSB Communication cable.
Master MSB board
2) When 2 MSB boards are used a
MSB Communication cable will be
installed between the master MSB
board and the second MSB. The open
connector will have the Terminal
connector installed on both MSB
boards.
2nd MSB board
A maximum of 5 MSB boards can
be connected to each other.
The terminal connector is
connected on the terminal MSB
which has an open connector.
2nd to 4th MSB board
WARNING
Disconnect all water heaters from their power source before carrying out
the following installation procedures.
NOTE: The front cover panels of each water heater must be removed prior
to completing the following installation procedures.
Kit Components
MSB-C2 (Pack C)
(For wiring MSB units)
Parts List
Part
MSB Communication cable
(13.1 ft, 4 m)
Terminal connector 2
Instruction Sheet
Qty
1
1
5th MSB board (Terminal MSB)
NOTE:
When viewing the installed MSB board, the dip switch will be as
shown below (upside down).
3) Set No 3 switch on the master MSB
to ON. The LED light 6 should turn ON
conrming the connection.
4) Set No 4 switch on the second MSB
to ON. The LED light 6 should turn ON
conrming the connection.
5) Set No 3 and No 4 switches on the
third MSB board to ON.
The LED light 6 should turn ON
conrming the connection.
Master
2nd
3rd
Communication Cables B
4th
MSB Communication cable (MSB-C2)
5th
Communication cable connectors
LED6
LED 1 ~ 5
(See MSB-C1 instruction)
Communication Cable A
Water Heater
Control
Control Board
6) Set the No 5 switch on the fourth
MSB board to ON.
The LED light 6 should turn ON
conrming the connection.
7) Set No 3 and No 5 switches on the
on the fth MSB board to ON.
The LED light 6 should turn ON
conrming the connection.
Indicator light (LED 6) on the Control Board indicates the status as
follows:
Solid
O
LED 6
Working with multiple MSB boards
EXPLANATION
Stand alone
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