Sheet 8757-4 Page 2
WIRING DIAGRAMS
Wiring Diagram
Wiring scheme and switching functions. Be sure to check that the contact electrical ratings correspond with the electrical service being used.
Switching Functions
2 NO
COM 3
Automatic Reset
Electrical Service
1 NC
When Pressure...
3-1
3-2
P
Reaches Setpoint
Opens Closes
Drops below setpoint Closes Opens
Electrical Code
Make all wiring connections to the switch in accordance with local or regional electrical codes.
Then reaches setpoint again
Opens Closes
Wire Ratings
Use 14 or 16 AWG wire rated for at least 75°C .
RECOMMENDED LAMP CONNECTIONS
(Switch positions shown in normal operating position with pressure applied)
GAO/GMH - High Limit
GAO/GML - Low Limit
2 NO
2 NO
COM 3
COM 3
1 NC
1 NC
Lamp
Lamp
P N
P
N
As pressure falls: Connection 3-1 closes, 3-2 opens, lamp illuminates indicating low limit fault. GML: Manual reset required.
As pressure rises: Connection 3-1 opens, 3-2 closes, lamp illuminates indicating high limit fault. GMH: Manual reset required.
NOTE: Standard pressure switches are supplied with a 120 V ac neon lamp. For voltages other than 120 V ac, choose an optional lamp below. Installation of lamp required.
R830-0001A: 24 V ac/28 V dc orange lamp R830-0003A: 220 V ac orange neon lamp For replacement 120 V ac lamp, order R830-0002A.
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
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