Chapter 8. Water Heater Management; General Description - Watts Aerco Innovation 800 User Manual

Innovation Hot Water Hot Water Boiler User Manual
CHAPTER 8.
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.
The On-Board-Water-Heater Management system II (WHM II) is an integrated C-MORE feature
designed to stage and coordinate multiple AERCO Innovation hot water boilers while
maximizing operational efficiency. The WHM software code resides in each C-More that is part
of the system. The WHMII can control up to eight (8) hot water boilers in parallel. Each hot
water boiler controlled by the WHM must be equipped with an Actuator-Controlled Sequencing
Valve (P/N 92123). These valves are installed on the cold water inlet on each hot water boiler
being controlled by the WHM (see Figure 8-2).

8.1 GENERAL DESCRIPTION

The C-More Water Heater Management System (WHM) is designed to ensure that all hot water
boilers in the system operate at maximum efficiency. This is accomplished by monitoring the
Air/Fuel Valve position (VP) of all hot water boilers 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 hot water boilers
connected to a WHM is shown in Figure 8-1.
Figure 8-1. Simplified Block Diagram - Water Heater Management (WHM)
OMM-0120_0A
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CHAPTER 8 – WATER HEATER MANAGEMENT
WATER HEATER MANAGEMENT
NOTE
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
Page 107 of 174
11/15/2016