GF - D 1
Gas Valves
80% Furnace Manifold Gas Pressure Measurement & Adjustment................................................... 2
Adjusting Manifold Outlet Pressure ................................................................................................ 2
Modulating Furnace Manifold Gas Pressure Measurement & Adjustment ...................................... 4
Setting Manifold Pressure Using Contingency Mode ...................................................................... 4
Setting Manifold Pressure Using Installer Test Mode ...................................................................... 8
Three Stage Furnace Gas Pressure Measurement & Adjustment ....................................................12
Setting Manifold Pressure Using Contingency Mode Option 1 ....................................................... 11
Setting Manifold Pressure Using Contingency Mode Option 2 .......................................................14
Setting Manifold Pressure Using Installer Test Mode .....................................................................19
Modulating & Three Stage Gas Valve Solenoid Check ...................................................................23
Introduction ...................................................................................................................................23
Pre-check .....................................................................................................................................23
Solenoid check .............................................................................................................................23
Communicating Gas Furnaces
Section D