User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 5 – SAFETY DEVICE TESTING
Page 74 of 178 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0103_0A
PRI: 10/28/2014 Phone: [phone] GF-147
Air Flow Fault Tests – Continued
6. Once the unit has proved flame, turn off the blower by going to the Configuration Menu,
Analog Output menu item and select OFF.
7. The Blower Proof Switch will open and the blower should stop. The unit should shut down
and display AIRFLOW FAULT DURING RUN.
8. Go to the Configuration Menu, Analog Output item and select VALVE POSITION 0-10v.
9. Press the CLEAR button. The unit should restart.
10. Next, check the operation of the Blocked Inlet Switch located on the inlet side of the Air/Fuel
Valve (Figure 5-4).
11. Ensure that the sheet metal panels are securely installed on the water heater and the unit is
running.
12. At the rear of the unit, partially block the air inlet (Figure 5-5) with a plywood sheet or metal
plate.
13. The unit should shut down and again display AIRFLOW FAULT DURING RUN.
14. Unblock the air inlet and press the CLEAR button. The unit should restart.
Figure 5-4: Blower Proof & Blocked Inlet Switch Locations
(A/F Valve Clear Cover Removed)
AIR/FUEL
VALVE
BLOWER
BLOCKED
INLET
SWITCH
BLOWER
PROOF
SWITCH
AIR FILTER
A/F VALVE
STEPPER
MOTOR