Rinnai Manifold Pack Installation Hand Over Manual; Rinnai Manifold Electronic Control System - Mecs - Rinnai MP2200 Operation & Installation Manual

RINNAI MANIFOLD PACK INSTALLATION HAND OVER MANUAL

Manifold Pack Principle Of Operation
Cold water enters system through cold inlet pipe is heated by water heater(s) and exits through hot pipe. Dead-leg
systems will deliver preset temperature as per dipswitch or controller settings.
Rinnai Heavy Duty Units require a minimum of 2.4 litres per minute per heater before they can operate. If this is
not achieved they will not fire. When there is an expected scenario that results in a lower flow per heater a staging
system is required. Rinnai offer MECS (Manifold Electronic Control System) or PAM (Pressure Activated Manifold)
valves. Staging will control the flow through each water heater, increasing the chance of minimum flow rate being
achieved. MECS measures the flow rate passing through the turbine of each heater. It will drive the geared motor
inside the HD unit shut in heaters that are not required to operate, therefore increasing the flow rate through the
remaining heaters. Extra heaters are fired as the flow rate increases. MECS also rotates the sequence of operation
to share the load across all heaters to maximise life expectancy.
PAM valves block the cold water supply to heaters that are not required. Therefore they do not start. Extra flow
causes extra pressure differential between the hot and cold pipes opening more PAM valves and firing more HD
heaters.

RINNAI MANIFOLD ELECTRONIC CONTROL SYSTEM - MECS

Rinnai Heavy Duty Gas Fired Continuous Flow Water Heaters can be manifolded together, (up to 25 individual
water heaters), by connecting them in parallel to enable a far greater hot water flow rate than is possible with a
single unit.
MECS is a totally integrated system unique to Rinnai that links each HD unit in the system and will turn on each
unit in the system as demand requires.
The key advantages to using MECS are as follows:
•
Very high flow rates/volumes made possible by linking individual heaters in parallel.
•
Load shared across linked heaters ensuring even wear rates.
•
Inherent redundancy in the event of a failed water heater(s).
•
Reduced gas consumption resulting in increased economy.
•
Unsurpassed water temperature consistency.
How it works
A master communication PCB and sub-communication PCB is installed in the first water heater, all other subsequent
water heaters have only the sub-communication PCB and slave cable installed.
The master communication PCB receives information about flow rates from the PCB of each unit and through the
use of electronics balances the load on each unit. Intelligent programming enables random selection of the units
required to supply the flow demand means that all units share the workload evenly.
All information is transmitted between the master water heater and the slave water heaters via the communication
cables to the slave units.
The master control also has a inbuilt fault detection system and will allocate a replacement unit should one of the
water heaters fail.
MECS Pro System has the capability of joining up to 25 Rinnai units and will replace the previous Rinnai
REU-SA2M/2S and REU-SA3M/3S MECS systems.
INVENTORY MARKETING
CODE
REUMSBM MECA04
REUMSBC1 MECB04
REUMSBC2 MECC04
REUMSBMB MECA05
Rinnai
CODE
MEC Pro Pack 1 MEC Pro Pack 1 (1 x master PCB and 2 x communication cables
and accessories to create master unit and 1 x slave unit).
MEC Pro Pack 2 MEC Pro Pack 2 (Communication cable and accessories to
connect each extra HD Unit to Master unit. One required per extra water heater).
MEC Pro Pack 3 (Communication cable and accessories to connect multiple
master PCB's. One required per extra master PCB).
MEC Pro Pack 4 (Same as MECA04 with master PCB externally mounted in
waterproof case).
DESCRIPTION
15
INSTALLATION
Commercial Manifold Pack OIM