NOZZLE MIX SYSTEMS
air
3D
5D
4 pipe dia.
10 pipe dia.
(B)
(A)
CHECKING OPERATION OF A CROSS-CONNECTED AIR/GAS RATIO REGULATOR
Install a gauge (A) in the impulse line as close as possible to the regulator, and a gauge (B) at the regulator outlet. As the air is turned up and down, these two gauges should change together and show approximately the same readings. If they do not, look for regulator or gas supply troubles. If they do follow, but the flame does not seem to hold proper ratio, look for impulse, burner, or back pressure problems. (See "Trouble Shooting" on the following pages)
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