2
1.0 Adjusting the Gas Valve
The FTG 2000, FTG 2200 & FTG 2400 are converted from Natural to LP Gas by adjusting
the Throttle Screw located on the gas valve; unlike most LP conversions an LP orifice is
NOT
used.
1.
Locate the Throttle Adjustment Screw on the gas valve, see Figure 1-1.
2.
Turn the Throttle Screw all the way in (clockwise until it stops).
3.
Turn the Throttle Screw counterclockwise (out) 2-
1
/
4
turns.
4.
Proceed to Section 2.0,
Gas Valve and Burner Setup
, for instructions on how to test the Gas Line Pressure,
perform the Combustion Calibration, and test the Gas Valve Offset Pressure.
Figure 1-1 Gas Valve Assembly
Pressure Tappings for Measuring Offset
(Refer to Offset Adjustment Procedure
–
Figure 2-1)
Gas Valve
Offset Screw
(Refer to Offset Adjustment
Procedure
– Figure 2-1)
Throttle Screw
Used to calibrate combustion at max.
modulation rate. Pre-set by turning screw
all the way in (clockwise) until it stops, then
turn out (counterclockwise) 2-
1
/
4
turns
Line Pressure Test Port
(located on gas valve inlet
flange)
Venturi
Combustion Blower
Air Filter
Low Gas Pres. Switch
(auto-reset)
High Gas Pres. Switch
(manual reset)
