Installation and Operation Instructions Matrix
26
Gas Inlet
Gas Valve
DO NOT Remove Cap
Manifold Pressure Test Port
Line Pressure Test Port
Throttle / Input
Adjustment Screw
Venturi
Figure 9-1 Gas Valve and Venturi Assembly
Adjustment
Input Screw Adjustments -
The boiler is equipped with a Throttle/Input Adjustment Screw, located on the Gas
Valve and Venturi Assembly. The Throttle screw is used to adjust the flow of gas leaving the gas valve,
entering the Venturi and hence entering the combustion air stream. By turning the adjustment screw in,
clockwise, the flow of gas is reduced and the combustion becomes leaner, thus reducing the concentration of
CO
2
in the flue gases. To increase the CO
2
the Throttle screw must be adjusted out, counterclockwise, thus
increasing the flow of gas from the gas valve to the combustion air stream. Typical adjustment required for
Natural Gas is 0-1 full turns in or out from the factory setting. Typical adjustment for LP Gas is 0-3 full turns
in or out from the factory setting upon inserting the LP orifice as per the applicable Propane conversion
instructions. See Figure 9-1 for throttle screw location.
Figure 9-2 Throttle/Input Adjustment Screw (All Models)
Decrease Gas -
Turn Clockwise
Increase Gas -
Turn Counter Clockwise
IF FOR ANY REASON THE INPUT SCREW IS ADJUSTED, A "COMBUSTION ANALYZER"
MUST BE USED TO ENSURE SAFE AND PROPER OPERATION OF THE GAS VALVE.
Adjustments to the Throttle screw may only be made by a qualified gas technician, while
using a calibrated combustion analyzer capable of measuring CO
2
and CO. Failure to
follow these instructions may result in serious injury or death.
Adjustments to the Throttle screw may only be performed if the gas line pressure is
maintained above minimum levels throughout the duration of the test; see Table 9-1.
Failure to follow these instructions may result in serious injury or death.
Throttle/Input
Adjustment Screw
Venturi
Содержание Matrix
Страница 18: ...Matrix Installation and Operation Instructions Figure 5 1 Termination Clearances Quick Reference Diagram ...
Страница 41: ...Matrix Installation and Operation Instructions 41 Figure 12 2 Low Voltage Field Wiring ...
Страница 55: ...Matrix Installation and Operation Instructions 55 16 0 WIRING SCHEMATICS Figure 14 1 a Connection Diagram ...
Страница 56: ...Installation and Operation Instructions Matrix 56 Figure 14 1 b Ladder Logic Diagram ...
Страница 71: ...Matrix Installation and Operation Instructions 71 NOTES ...