Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 4:
INITIAL START-UP
OMM-0123_E
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4.6 REASSEMBLY
Once the combustion calibration adjustments are properly set, the unit can be reassembled for
service operation.
Reassembly Instructions
1. Set the ON/OFF switch in the
OFF
position.
2. Disconnect AC power from the unit.
3. Shut off the gas supply to the unit.
4. Remove the manometer and barbed fittings and reinstall the NPT plug using a suitable
pipe thread compound.
5.
Remove the combustion analyzer probe from the 1/4” vent hole in the exhaust manifold
and then r
eplace the 1/4” NPT plug in the vent hole.
6. Replace all previously removed sheet metal enclosures on the unit.
4.7 DUAL FUEL SWITCHOVER
Dual Fuel models contain a fuel selector switch, located on the Temperature Limit panel.
Instructions for switching from one fuel to the other are in Sections 4.7.1 and 4.7.2.
Figure 4-4: Dual Fuel Switch Location
DUAL FUEL
CUTOVER
SWITCH
