OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 60 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 6: SAFETY DEVICE TESTING
Figure 6-8: Blower Proof Switch
4.
Set the Controller’s
Enable/Disable
switch to
Enable
and wait for the Water Heater to
go into the Purge sequence.
5. After about 5 seconds, with air flowing into the combustion chamber, slowly turn the dial
clock-wise (to higher value) until the unit trips off with an
Air Flow Fault During Purge
message. Optionally, attach a manometer and measure the setting at the trip point.
6. After the Water Heater shuts down, reset the dial indicator to its original position, shown
on the switch cover label, then replace the switch cover.
7. Reset the Water Heater.
6.8.2 Blocked Inlet Switch Test
This test will be run in simulated fire mode, with the Blocked Inlet switch isolated from the rest of
the control circuitry.
1.
Set the Controller’s
Enable/Disable
switch to
Disable
.
2. Remove the air filter (see Figure 6-7, above).
WARNING:
THE BLOWER SUCTION IS VERY STRONG AND CAN PULL NEARBY
OBJECTS INTO THE FAN BLADES!
3. Turn off the gas supply ball valve to the unit and then complete the following steps:
a) Use jumper wires to jump out the Low Gas Pressure switch and Blower Proof switch.
b) Remove the black connector boot from the Flame Detector.
c)
Create a connector as shown below and connect it to the Flame Detector’s black
connector boot. Keep the alligator clip away from bare metal parts until step 5b.
Figure 6-9: Connecting the Flame Signal Generator
4. Go to
Diagnostics
→
Manual Run
and enable the
Manual Mode
control.
5.
Ramp the Water Heater up to 100% fire rate and then set the Controller’s
Enable/Disable
switch to
Enable
.