Rinnai Submittal Sheet: MSB Electronic Control Miscellaneous Information
MSB ELECTRONIC CONTROLS AND EZ CONNECT
SUBMITTAL SHEET
Job Name:
Location:
Architect/Engineer:
Wholesaler:
Number of Heaters:
Notes:
FEATURES AND BENEFITS
• Modulating technology witih up to 327:1 Turndown
(25 units with MSB electronic controls)
• 15,200 Btuh to 5 Million Btuh
• 0.26 gpm to 245 gpm hot water flow range
• Each MSB-M board will connect up to 5 water heaters using the
MSB-C1 kits.
• Up to 5 MSB-M boards can be connected together with
communication cables (MSB-C2 kits) allowing up to 25 water heaters
to operate as a single system.
• When multiple water heaters are operating, they will attempt to
supply equal amounts of hot water.
BTU/Hr Input:
• The temperature setting for all of the connected water heaters
is controlled by the temperature controller connected to the
water heater with the Master MSB Board. Temperature controllers
connected to the other units will provide maintenance codes for their
respective units.
• If a water temperature over 140 degree F is desired, then an MCC-91-
2 controller needs to be connected to Master Control Board.
• The order in which each water heater operates is occasionally rotated
to ensure equal usage among the entire system.
• Detailed installation instructions are provided with each of the kits.
NOTE: For tankless only systems, reference MSB installation
instructions to ensure distance between racks do not exceed MSB
communication cable length.
* The Rinnai EZConnect™ is specifically designed for connecting only 2 water heaters.
OPTIONS
MSB-M Kit
MSB-C1 Kit
MSB-C2 Kit
EZ-Connect™
Rinnai America Corporation • 103 International Drive Peachtree City, GA 30269 • 800-621-9419
TANKLESS RACK SYSTEM (TRS)
MSB Control System and EZConnect
• Each MSB-M board will connect up to 5 water
heaters using the MSB-C1 kits.
• Up to 5 MSB-M boards can be connected together
with communication cables (MSB-C2 kits) allowing
up to 25 water heaters to operate as a single
system.
• An MSB system could have an operating range of
15,200 BTU to as great as 5 million BTU. In terms
of flow rate, 0.4 gpm to 245 gpm.
• When multiple water heaters are operating, they will
attempt to supply equal amounts of hot water.
• The temperature setting for all of the connected
water heaters is controlled by the temperature
controller connected to the water heater with the
Master MSB Board. Temperature controllers
connected to the other units will provide
maintenance codes for their respective units.
• If a water temperature over 140 degree F is
desired, then an MCC-91-2 controller needs to be
connected to Master Control Board
• The order in which each water heater operates is
occasionally rotated to ensure equal usage among
the entire system.
Number of Components
Required
No. of
water
heaters
2* 1 NA NA
3 1 1 NA
4 1 2 NA
5 1 3 NA
6 2 2 1
7 2 3 1
8 2 4 1
9 2 5 1
10 2 6 1
11 3 5 2
12 3 6 2
13 3 7 2
14 3 8 2
15 3 9 2
MSB-M MSB-C1 MSB-C2
• Detailed installation instructions are provided with
each of the kits.
NOTE: For tankless only systems, referenc e MSB
installation instructions to ensure distance
between racks do not exceed MSB
communication cable length.
* The Rinnai EZConnect™ is specifically designed
for connecting only 2 water heaters.
MSB-M kit includes
• Control board
• Cable A (23 in, 585 mm)
• Cable B (9.8 ft, 3 m)
• Brackets, ties, and screws
• Instructions
MSB-C1 kit includes
• Cable B (9.8 ft, 3 m)
• Brackets, ties, and screws
• Instructions
16 4 8 3
17 4 9 3
18 4 10 3
19 4 11 3
20 4 12 3
21 5 11 4
22 5 12 4
23 5 13 4
24 5 14 4
25 5 15 4
MSB-C2 kit includes
• MSB Cable (13.1 ft, 4 m)
• Terminal connectors
• Instructions
Rinnai Corporation • 103 International Drive • Peachtree City, GA 30269 • Toll-Free: 1-800-621-9419 • Fax: 678-829-1666 • www.rinnai.us
11 SP-TRS
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