AERCO Innovation (G-13-1854 and above) - Manual (Page 109)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 9 – WATER HEATER MANAGEMENT
OMM-0078_0J
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 109 of
196
GF-128
Phone: 800-526-0288
PRI: 11/22/2013
CHAPTER 9. WATER HEATER MANAGEMENT
NOTE
Some of the descriptions and procedures provided in this Chapter may
duplicate information provided in previous Chapters of this manual. This is
being done to minimize referencing back to these descriptions and
procedures and organize all WHM related information into a single
Chapter. It is assumed that the user is familiar with the basic C-More Menu
processing procedures used throughout this manual.
9.1 INTRODUCTION
The C-More Water Heater Management (WHM) feature is designed for use with multiple
AERCO Water Heaters equipped with C-More Controllers. The software code required to
operate the WHM resides in each of the C-Mores that are part of the system. The WHM can
control up to eight (8) water heaters in parallel. Each water heater controlled by the WHM must
be equipped with an Actuator-Controlled Sequencing Valve, Part No. 92093. These valves are
installed on the cold water inlet of each water heater being controlled by the WHM.
9.2 GENERAL DESCRIPTION
The C-More Water Heater Management System (WHM) is designed to ensure that all water
heaters in the system operate at maximum efficiency. This is accomplished by monitoring the
Air/Fuel Valve position (VP) of all water heaters that have their sequencing valves open. Units
with open sequencing valves are called enabled units. Units with closed sequencing valves are
called disabled units. Units which are unable to function, due to a fault or user intervention, are
called offline units. When there is minimal or no demand for hot water, the sequencing valve for
one unit will be open. As system load increases, the WHM will open the sequencing valves on
additional heaters. A simplified block diagram of multiple water heaters connected to a WHM is
shown in Figure 9-1.
Figure 9-1. Simplified Block Diagram - Water Heater Management (WHM)