Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 5 – SAFETY DEVICE TESTING
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 97 of 122
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 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. Remove the Air/Fuel Valve cover (Figure 5-10a or 5-10b,
above) by rotating the cover
counterclockwise to unlock and lift up to remove.
4. Remove one of the two wires (#169 or #170) from the Ignition switch (see Figure 5-11a or
5-11b, above).
5. Initiate a unit start sequence.
6. The unit should begin its start sequence and then shut down and display
OPEN DURING IGNITION.
7. Replace the wire on the Ignition switch and press the CLEAR
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.
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