6177R-RMAW7 A-B Relay Input Module
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6177R-RMAW7Payment:
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IN STOCK6177R-RMAW7 A-B Relay Input Module
To set the control to a given differential, turn adjustment screw "B" clockwise approximately 12 turns. Apply the difference pressure to "trip" the control as in the "Difference Pressure Setting" paragraph. Lower and maintain this pressure at the desired differential. Turn the adjustment screw "B" counterclockwise until the switch just "resets". For the 2 - circuit snap switch contacts 1-2 will close. For the 4 - circuit snap switch contacts 1-2 & 5-6 will close. Repeat these steps between "trip" and "reset" several times to insure proper setting. The adjustment screw "B" should never extend above the base of the enclosure. The setting procedure is now complete. Connect the top bellows, lower pressure, into the system. The control will operate as a difference pressure control with the differential as set per instructions. After the desired settings have been accomplished and the installation complete, mount the cover and tighten the four cover screws 6-8 in.-lbs to insure a good seal between cover and base. Operating variables in a system may cause changing pressure requirements. It is recommended that a periodic inspection of the gauge pressure be made and the pressure control adjusted to compensate when necessary for these changes.
SETTING CONTROL - Unless otherwise specified, controls shipped from the factory are set at the maximum operating difference pressure and minimum differential as specified on the nameplate. This would position the difference pressure adjusting bushing "A" approximately one inch from the bottom of the enclosure. Use a pressure gauge to make the following adjustments: DIFFERENCE PRESSURE SETTING: The difference pressure adjustment sets the control to "trip" the contacts at the desired difference in pressure between the two bellows as required for the application. With no pressure (open to atmosphere) applied to the top bellows, apply a constant pressure to the bottom bellows equal to the desired difference in pressure at which the contacts are to "trip" during operation of the system. Insert a 1/8" diameter rod into a hole in the adjusting bushing "A" and turn bushing to the left. Continue to turn bushing until the mechanism "trips", circuit 1-2 will open. At this point, the difference pressure is set at the pressure which is being applied to the bottom bellows
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