Gas Pressure Switches - Wayne LC2300M Manual

NOTE: MANIFOLD PRESSURE ADJUSTMENTS CAN ONLY BE MADE WITH THE
The pressure tap for manifold pressure measurement is located on the back side of the SKP25. Use a
"u"-tube manometer or dial type pressure gauge, scaled from 0"w.c. to 15.0" w.c. to read pressure.
J. GAS PRESSURE SWITCHES
J.1 MOUNTING
All switches can be mounted in either horizontal or vertical position. Switches should be
reasonably level but do not require accurate leveling. Switches have been factory calibrated and
tested for leaks. However, it is recommended that the switch body, gas pipe inlets and
connections be soapy solution tested for leaks after burner installation.
J.2 OPERATION
Low Gas Pressure Models: Low gas pressure switches break the electrical circuit upon pressure
drop at the point when gas pressure becomes lower than the indicated set pressure. Switch
models used are self-resetting and only require that gas pressure returns to the required range
prior to resetting any control faults.
High Gas Pressure Models: High gas pressure switches break the electrical circuit when
pressure rises above the indicated preset pressure.
Range Adjustment - All Models: To adjust gas pressure cut-off setting, remove the cover. Turn
the range scale adjustable knob to increase pressure setting or decrease pressure setting. Install
cover and tighten the cover screws to prevent tampering. Proper adjustment of the high and low
gas pressure switches is explained in SECTION II – INITIAL START UP.
J.3 GAS MODULATION – DIRECT SPARK IGNITION
The LC2300M burner is classified as fuel train option 1. This option is pre-programmed into
parameter 201 and allows full gas modulation, direct spark ignition and both air and gas
actuators controlled electronically.
SV – Safety Valve (Optional)
PS Min – Low Pressure Switch (Gas)
PS Max – High Pressure Switch (Gas)
63899-002 Rev. A 3/20/2024
BURNER FIRING AND THE GAS ON.
Gas Train Skeleton Diagram
Figure 10
V1 – Upstream Gas Valve
V2 – Downstream Gas Valve
M – Gas Actuator
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