User manual GRACO FF-3500 36942-1_E

[. . . ] Model FF-3500 Proportioning Unit Operating Manual 36942-1 November 10, 2004 Issue 3 GUSMER CORPORATION ® One Gusmer Drive Lakewood, New Jersey, USA 08701-8055 Toll Free 1-800-367-4767 (USA & Canada) Phone: (732) 370-9000 Fax: (732) 905-8968 Copyright 2004, GUSMER CORPORATION ® http://www. gusmer. com NOTICE: This manual contains important information about your GUSMER equipment. Read and retain for future reference. Model FF-3500 Proportioning Unit NOTICE: The equipment described in this technical manual must only be operated or serviced by properly trained individuals, thoroughly familiar with the operating instructions and limitations of the equipment. Call: 1-800-FOR-GSMR (1-800-367-4767) for the name and telephone number of your local distributor. NOTICE: All statements, information and data given herein are believed to be accurate and reliable but are presented without guarantee, warranty or responsibility of any kind expressed or implied. Statements or suggestions concerning possible use of GUSMER equipment are made without representation or warranty that any such use is free of patent infringement, and are not recommendations to infringe any patent. [. . . ] Tap Settings 11/10/04 21 Model FF-3500 Proportioning Unit OPERATION Daily Start-up Procedure IMPORTANT: The Daily Start-up Procedures describe normal operation, assume that all calibrations have been properly executed, and that the heating system is not up to operating temperature. IMPORTANT: The cylinder lip seal packings on the FF-3500 proportioning pumps are not adjustable. Inspect the packings for excessive seepage during pump operation and replace if necessary. Determine that the supply system is at the proper temperature as recommended by the system supplier, that the individual chemicals are properly mixed within their drums, and that the moisture protection system is properly set for operation. Uncoil the heated hose assemblies. NOTE: Inlet screens are recommended and are available through your local distributor. 3. 7. WARNING: UNCOIL THE HOSES BEFORE SWITCHING ON THE HOSE HEAT CIRCUIT BREAKER TO PREVENT OVERHEATING THE HOSE ASSEMBLIES AND CREATING HOT SPOTS WITHIN THEM. 8. (The temperature controller should begin to cycle toward its set point. If the set point needs to be changed, see Digital Temperature Controllers on Page 20. ) 10. (The temperature controllers should begin to cycle toward their set points. If the set point needs to be changed, see Digital Temperature Controllers on Page 20. ) WARNING: TO PREVENT EXCESSIVE PRESSURE BUILD-UP IN THE HEATED HOSES, ALWAYS BRING THE HOSES AND PRIMARY HEATER UP TO OPERATING TEMPERATURE BEFORE TURNING ON THE PUMP SWITCH. 22 36942-1, Issue 3 Operating Manual Operation 12. One of the amber directional indicator lights should be ON and the proportioning pumps should move a short distance and pressurize. NOTE: The standard size 52 pumps have a material pressure to air pressure ratio of approximately 33 to 1. 13. Always set the down stroke pressure regulator first to the desired air pressure, then set the upstroke pressure regulator approximately 10 psi lower to compensate for the pressure boost generated by pressure feeding material into the pumps. Consult the gun operating manual and test dispense as per the directions. Observe the iso and resin pressure gauges on both the up and down strokes. Readjust the upstroke pressure regulator as required so that the proportioning pump pressure is equal on both the up and down strokes. The proportioning unit is now ready for operation. Daily Shut-Down Procedure 1. Trigger the gun off target until the proportioning pumps stop in the retracted (full down) position and the pressure of both pumps bleeds off to approx. IMPORTANT: DO NOT bleed the pressure to zero, as some pressure is required to keep the packings operating normally and prevent seepage during shutdown. IMPORTANT: Turn the hose heat power control full counterclockwise at every shut-down to minimize the hose heat amperage and prevent damage to the phase controller during start-up. Shut down and service the gun as required (see gun operating manual). 11/10/04 23 Model FF-3500 Proportioning Unit TROUBLESHOOTING General Information When properly maintained and operated, GUSMER equipment will provide long and faithful service. However, occasional problems will arise that must be resolved before operation can continue. [. . . ] Fill the cup with fresh pump lubricant to about 1/4 inch below the top. 3. Proportioning Pumps Disassemble and clean both proportioning pumps annually. Inspect the pistons and cylinders for mars or scratches, which may cause leakage or damage to packings. As a preventive maintenance precaution, Gusmer also recommends replacing the piston and cylinder packings on an annual basis. for reference. ) WARNING: AFTER REASSEMBLING OR SERVICING THE PROPORTIONING PUMPS, TORQUE THE CYLINDER TOP HEX NUTS TO 10 FT/LBS. Pump Bases 1. [. . . ]