Table of Contents
Advertisement
Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 5: SAFETY DEVICE TESTING
5.7 FLAME FAULT TEST
Flame faults can occur during ignition or while the unit is already running. To simulate each of
these fault conditions, proceed as follows:
Flame Fault Test Instructions
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, as shown on Figure 5-5, below.
4. It may be necessary to jump out the High Gas Pressure switch.
5. Set the ON/OFF switch to the ON position to start the unit.
6. The unit should purge and light the Pilot flame and then shut down after reaching the main
Burner Ignition cycle and display FLAME LOSS DURING IGN.
7. Open the valve previously closed in step 3 and press the CLEAR button.
8. Restart the unit and allow it to prove flame.
9. Once flame is proven, close the manual gas valve located between the SSOV and the
Air/Fuel Valve (see Figure 5-5, below).
10. The unit should shut down and Lockout. A flashing FLAME LOSS DURING RUN should
appear in the display.
11. Open the valve previously closed in step 9.
12. Press the CLEAR button. The unit should restart and fire.
5.8 AIR FLOW FAULT TESTS
These tests check the operation of the Blower Proof switch and Blocked Inlet switch shown in
Figure 5-5.
BLOCKED INLET SWITCH
AIR/FUEL VALVE
ASSEMBLY
MANUAL SHUT-
OFF VALVE
Figure 5-5: Blower Proof & Blocked Inlet Switch Locations
OMM-0123_E • GF-207 • 12/17/2019
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
BLOWER
BLOWER PROOF
SWITCH
HEX SCREWS
HOLDING WYE DUCT
TO A/F VALVE
(1 OF 3)
Page 70 of 95
Advertisement
Table of Contents
