
2.3BOILER COMMISSIONING
NOTE:
All of the installation instructions found in section 1 must be completed before commissioning the boiler.
WARNING:
The following procedures must be followed carefully before putting the boiler in operation. Failure to do so will present severe hazards to equipment, operating personnel and building occupants.
2.3.1MODULATION
Date: 8-4-2010
Revision: 0
Form: 2396
The regulating gas valve is a 1:1 differential pressure air / gas ratio controller. This means that the control adjusts the same pressure difference on the gas side as it senses on the airside. The airside pressure is the difference between the pressure in the burner housing and the pressure downstream of the furnace section. The gas side pressure is the difference between the pressure upstream and downstream of the gas limiting orifice valve. For the locations of the +/- gas and air connections see (Figure 39). Air to gas ratios are adjusted with the gas limiting orifice valve (Figure 7 item 26).
During the burner
Figure 39 Air / Gas Ratio Tappings
Modulation on the
35
2.3.2TEST SETUP
Connect a
Connect a 0 – 5 psi gauge in the port provided in the low gas pressure switch connection (Figure 7 item 28).
Connect a
A suitable combustion analyzer shall be used for measuring O2, CO, and Nox levels. The analyzer probe should be inserted in the stack above the boiler outlet and before any draft controls. Calibration is required for the Nox and CO cells at the time of commissioning.
2.3.3PRE CHECKS AND SETUP
Close the manual gas cock (Figure 7 item 4).