Installation guide
Rinnai Continuous Flow Water Heating Specication Guide 02-13 | 13
Manifold electronic control system (MECS)
Infinity units can be manifolded together (up to 25) by connecting them in parallel to
enable a greater hot water flow rate than is possible with a single unit. MECS is a totally
integrated system, unique to Rinnai, that links each Infinity unit in the system and will turn
on each unit as required. The system is designed to ensure gas is not wasted and that an
endless supply of hot water is always available.
How it works
A master and sub-communication PCB is installed in the first unit and other subsequent units have only the sub-
communication PCB (slave cable) installed. The master communication PCB receives information about flow rates
from the PCB of each unit and balances the load on each unit.
All information is transmitted via communication cables to the slave units. The master control also has an inbuilt
fault detection system and will allocate a replacement unit should one fail.
Typical manifold setup
If you think a Rinnai Infinity manifolded solution is right for you, please contact Rinnai Customer Services and they
will advise what components you will need.
On electronically manifolded systems keep the hot water outlet connections to the common manifold as short as possible to avoid
cold slugs. Also keep the water heaters as close together as possible.
REUMSBMB
(MECS master
slave kit)
Gas
Cold
Supply
Hot
delivery
Up to 25
MC91
(Compact
controller)