Tx I&O Manual
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Gas Valve and Burner Set-up
35
Figure 9-1 Gas Valve and Venturi Assembly (Tx51-151)
Figure 9-2 Gas Valve and Venturi Assembly (Tx200)
Venturi
Gas Valve
Offset Screw
– used to set
combustion at min. modulation rate
(use 2 mm hex wrench)
Throttle Screw
–
used to calibrate
combustion at max. modulation rate
Line Pressure
Test Port
Gas Valve
Venturi
Throttle Screw
–
used to calibrate
combustion at max. modulation rate
Offset Screw
– used to set
combustion at min. modulation rate;
must remove cap first
(use T40 Torx hex wrench)
Line Pressure Test Port
