GF
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128
Innovation Series Water Heaters
Chapter 5
OMM-0079_0B
USER MANUAL
Safety Device Testing
Page
56
of
200
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph.: 800-526-0288
07/21/11
5.9
SSOV PROOF OF CLOSURE SWITCH
The SSOV shown in Figure 5-1 contains the proof of closure switch. The proof of closure switch circuit is
checked as follows:
1. Set the unit’s
ON/OFF
switch to the
OFF
position.
2. Place the unit in Manual Mode and set the valve position between 25% and 30%
3. Refer to Figure 5-1 and locate the SSOV.
4. Remove the cover from the SSOV by loosening the screw shown in Figure 5-6. Lift off the cover to
access the terminal wiring connections.
5. Disconnect wire #148 from the SSOV to “open” the proof of closure switch circuit.
6. The unit should fault and display
SSOV SWITCH OPEN.
7. Replace wire #148 and press the
CLEAR
button.
8. Set the
ON/OFF
switch to
ON
to start the unit.
9. Remove the wire again when the unit reaches the purge cycle and
PURGING
is displayed.
10. The unit should shut down and display
SSOV FAULT DURING PURGE.
11. Replace the wire on the SSOV and press the
CLEAR
button. The unit should restart.
Figure 5-6. SSOV Actuator Cover Location
5.10 PURGE SWITCH OPEN DURING PURGE
The Purge Switch (and Ignition Switch) is located on the Air/Fuel Valve. To check the switch, proceed as
follows:
1. Set the unit’s
ON/OFF
switch to the
OFF
position. Place the unit in manual mode and set the valve
position between 25% and 30%.
2. Remove the Air/Fuel Valve cover by rotating the cover counterclockwise to unlock it (see Figure 5-7).
3. Remove one of the two wires (#171 or #172) from the Purge Switch (Figure 5-8).
4. Initiate a unit start sequence.
5. The unit should begin it’s start sequence, then shut down and display
PRG SWITCH OPEN DURING
PURGE.
6. Replace the wire on the Purge Switch and depress the
CLEAR
button. The unit should restart.
