Ignition Switch Open During Ignition; Safety Pressure Relief Valve Test - Watts Aerco Benchmark BMK750 Operation And Service Manual

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 5 – SAFETY DEVICE TESTING
Purge Switch Open During Purge Check Instructions
DIAL
Figure 5-11c: Air/Fuel Purge and Ignition Locations – BMK5000 & 6000

5.11 IGNITION SWITCH OPEN DURING IGNITION

The Ignition switch (and the Purge switch) is located on the Air/Fuel Valve. To check the
switch, proceed as follows:
Ignition Switch Open During Ignition Check Instructions
1. Set the Controller's Enable/Disable switch to Disable.
2. Go to Main Menu→Diagnostics→Manual Run and then put the unit in Manual Mode.
3. Set the valve position between 25% and 30% using the + (Plus) and – (Minus) controls.
4. Remove the Air/Fuel Valve cover (Figure 5-10, above) by rotating the cover
counterclockwise.
5. Remove one of the two wires (#169 or #170) from the Ignition switch (see Figure 5-11a –
5-11c, above).
6. Set the Controller's Enable/Disable switch to Enable to start the unit.
7. The unit should begin its start sequence and then shut down and display Ign Switch Open
During Ignition.
8. Replace the wire on the Ignition switch and press the CLEAR button. The unit should
restart.

5.12 SAFETY PRESSURE RELIEF VALVE TEST

Test the safety Pressure Relief Valve in accordance with ASME Boiler and Pressure Vessel
Code, Section VI.
OMM-0145_D • GF-218 •
11/2/2020
AIR IN
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