NTI Trinity TX Series Installation And Operation Manual page 35

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