AERCO AM Series Boiler Cascade Sequencer Controller - Manual (Page 5)

AM Series Cascade Sequencer
INSTALLATION AND OPERATION MANUAL
CHAPTER 1: INSTALLATION
1.1 Piping Installation
WARNING!
Prior to appliance installation and/or maintenance, disconnect the
appliance’s electrical power supply and shut off the inlet gas
valve. Failure to follow these instructions could result in severe
personal injury or death!
In order for the AM Cascade Sequencer to operate correctly, the AM Series heaters must be
installed as shown in Figure 1-1.
Because the cascade general sensor is installed on the Manager heater, the managing heater
must always be the closest to the low loss header in order to provide the most accurate
temperature measurement.
A maximum of eight (8) heaters may be connected into the cascade system.
At the time of the installation all heaters will have the same settings. After installation, the heater
nearest the low loss header will require some hardware adjustment to become the managing
heater, and the other heaters will need a change to the software settings to become the
dependent heaters. Instructions for doing this are provided in the following sections.
NOTE
Figure 1-1 shows only one piping configuration example. Other
piping configurations are possible. Contact AERCO technical
support for information concerning alternative configurations.
Figure 1-1: Cascade Sequencing Heater/Boiler Piping Installation
OMM-0101_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 5 of 26
GF-146-CS Ph.: 800-526-0288 PRI - 11/25/14