AERCO C-More Controls Manual June 2010 - Manual (Page 91)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 91 of 162
OMM-0032_0E Phone: 800-526-0288 GF-112
SECTION 8 - WATER HEATER MANAGEMENT (WHM)
NOTE
The Water Heater Management (WHM) feature is used with
Innovation Water Heaters equipped with C-More Software Version
3.08.xx.
8.1 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.
8.2 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 off-line 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 8-1.
Figure 8-1. Simplified Block Diagram - Water Heater Management (WHM)