AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 53)

Chapter 5 Innovation Series Water Heaters
GF-128
Safety Device Testing USER MANUAL OMM-0079_0B
07/21/11 AERCO International, Inc.
· 100 Oritani Dr. · Blauvelt, NY 10913 · Ph: 800-526-0288
Page 53 of 200
5.6.2 Delayed Interlock
1. Remove the cover from the I/O Box and locate the DELAYED INTL’K IN terminals (see Figure 2-12).
2. Start the unit in the Manual Mode at a valve position between 25% and 30%.
3. If there is a jumper across the DELAYED INTL’K IN terminals, remove one side of the jumper. If the
interlock is connected to a proving switch of an external device, disconnect one of the wires leading to
the proving switch.
4. The unit should shut down and display a DELAYED INTERLOCK OPEN fault message. The FAULT
LED should be flashing.
5. Reconnect the wire or jumper removed in step 3 to restore the interlock.
6. Press the CLEAR button to reset the fault.
7. The unit should start.
5.7 FLAME FAULT TESTS
Flame faults can occur during ignition or while the unit is already running. To simulate each of these fault
conditions, proceed as follows:
1. Set the ON/OFF switch to the OFF position.
2. Place the unit in the Manual Mode and set the valve position between 25% and 30%.
3. Close the manual gas shutoff valve located between the Safety Shut-Off Valve (SSOV) and the
Air/Fuel Valve (see Figure 5-3).
4. Set the ON/OFF switch to the ON position to start the unit.
5. The unit should shut down after reaching the Ignition cycle and display FLAME LOSS DURING IGN.
6. Open the valve previously closed in step 3 and press the CLEAR button.
7. Restart the unit and allow it to prove flame.
8. Once flame is proven, close the 1” manual gas shut-off valve located between the SSOV (Figure 5-3)
and the Air/Fuel Valve.
9. The unit should shut down and execute an IGNITION RETRY cycle by performing the following steps:
(a) The unit will execute a shutdown purge cycle for a period of 15 seconds and display WAIT
FAULT PURGE.
(b) The unit will execute a 30 second re-ignition delay and display WAIT RETRY PAUSE.
(c) The unit will then execute a standard ignition sequence and display WAIT IGNITION RETRY.
10. Since the manual gas shutoff valve is still closed, the unit will shut down and display FLAME LOSS
DURING IGNITION following the IGNITION RETRY cycle.
11. Open the valve previously closed in step 8.
12. Press the CLEAR button. The unit should restart and fire.