Greenheck IG / IGX (464104 IOM) (Pre-2009) - Manual (Page 35)

35
Start-Up - Single Stage Control
Step 1 Send Unit to High Fire
Send the unit to high fire by setting the temperature
selector to its maximum setting.
Step 2 Check the High Fire Manifold Pressure
Using a manometer, measure the burner manifold pressure at the manifold pressure test port. Refer to the gas
train layout in the reference section for the test port location.
The pressure on high fire should be 3 1 ⁄
2
inches wc for natural gas and 10 inches wc for LP gas.
If needed, use the high fire adjustment screw on the staged gas valve to adjust the high fire manifold pressure.
Counterclockwise rotation will decrease the gas pressure and clockwise rotation will increase the gas pressure.
Step 3 Reset the Temperature Setting
Reset the temperature setting on the temperature selector to the desired setting.
Single Stage Manifold
Pressure (inches wc)
Natural Gas LP
High Fire 3 1 ⁄
2
10
Start-Up
Temperature
Selector
High Fire
Adjustment