AERCO Modulex High Pressure Manual - Manual (Page 38)

INSTALLATION, OPERATION & MAINTENANCE
6-4
6.5.1 Tools and Instrumentation Required For Combustion Calibration
The following tools and instrumentation are necessary to perform combustion calibration of the unit:
• Digital Combustion Analyzer: Oxygen (O
2
) and Carbon Dioxide (CO
2
) accuracy to ±0.4%; Carbon
Monoxide (CO) resolution to 1 ppm
• One 16” W.C. manometer or equivalent gauge
• Small and large flat-tip screwdrivers
• T40 Torx tool
• Length of plastic tubing (3/8” I.D.)
6.5.2 INSTALLING THE SUPPLY GAS MANOMETER
Install the W.C. manometer (or gauge) as follows:
1. Turn off the external main gas supply valve to the unit.
2. Remove the top panel from the Modulex boiler to provide access to gas supply manifold.
3. Refer to Figure 6-1 and locate the gas pressure tap on the gas supply manifold.
4. Using a flat-tip screwdriver, rotate the pressure tap screw counterclockwise three full revolutions
to the open position.
5. Attach one end of the length of plastic tubing to the gas pressure tap. Attach the other end to the
W.C. manometer (or gauge).
Figure 6-1. Partial Top View Showing Gas Pressure Tap