Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 6: SAFETY DEVICE TESTING
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 61 of 131
6.8 AIR FLOW FAULT TESTS-BLOWER PROOF & BLOCKED INLET SWITCHES
These tests check the operation of the
Blower Proof
switch
and Blocked Inlet
switch.
6.8.1 Blower Proof Switch Test
Figure 6-7: Blower Proof & Blocked Inlet Switch Locations
1.
Set the Controller’s
Enable/Disable
switch to
Disable
.
2. Remove the front panels to gain access to the Blower Proof Switch, shown above.
3. Use a Phillips head screw drive to remove the front cover from the switch to reveal the
switch setting indicator dial (0.6 in the figure below) .
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.