User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
Page 50 of 178 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0103_0A
PRI: 10/28/2014 Phone: [phone] GF-147
3.9 START SEQUENCE
When the Control Box ON/OFF switch is set to the ON position, it checks all pre-purge safety
switches to ensure they are closed. These switches include:
 Safety Shut-Off Valve Proof of Closure (POC) switch
 Low Water Level switch
 High Water Temperature switch
 High Gas Pressure switch
 Low Gas Pressure switch
 Blower Proof switch
NOTE
The downstream Low Gas Pressure switch is not checked prior to
starting the pre-purge.
If all of the above switches are closed, the READY light above the ON/OFF switch will light and
the unit will be in the Standby mode.
When there is a demand for hot water, the following events will occur:
NOTE
If any of the Pre-Purge safety device switches are open, the
appropriate fault message will be displayed. Also, if the required
conditions are not observed at any point during the start
sequence, appropriate messages will be displayed and the unit
will go into fault mode.