User manual GRACO FF-2500 25942-1

[. . . ] Model FF-2500 Proportioning Unit Operating Manual 25942-1 February 12, 2004 Issue 4 GUSMER CORPORATION ® A Subsidiary of Gusmer Machinery Group, Inc. 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-2500 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. For technical service, call your local distributor. [. . . ] If a scuff jacket is being used, pull it over the bundle and secure with tape. 20 25942-1, Issue 4 Operating Manual Operation 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. Check the condition of the air system and isocyanate lubricant cup. 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. The packing nuts on the iso and resin pumps are adjustable and will require periodic tightening. The iso packing will require tightening when the pump lubricant requires frequent changing. Check the inlet screens and service as required. Turn on the main air supply to the transfer pumps. Uncoil the heated hose assemblies. 2. 3. 4. 8. WARNING: UNCOIL THE HOSES BEFORE SWITCHING ON THE HOSE HEAT CIRCUIT BREAKER TO PREVENT OVERHEATING THE HOSE ASSEMBLIES AND CREATING HOT SPOTS WITHIN THEM. 9. With the hose heat power set fully counterclockwise, turn ON the hose heat circuit breaker. If the temperature set point needs to be changed, see Temperature Controllers on page 16. 10. Adjust the hose heat power set (clockwise) to between 45 and 50 amps (do not exceed 50 amps). Make small adjustments and allow the hose heater to stabilize in between. When the liquid in the hoses reaches the desired temperature, the ammeter will cycle on and off and temperature control will be completely automatic from this point. If 50 Amps cannot be achieved, refer to Troubleshooting, Hose Heat System on page 30. Switch ON the primary heater circuit breaker. If the temperature set point needs to be changed, see Temperature Controllers on page 16. Set the desired temperature of the heater by making small adjustments to the temperature control screw (clockwise to increase, counterclockwise to decrease) and allowing the heater to stabilize in between. 2/12/04 21 Model FF-2500 Proportioning Unit 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. 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 40 pumps have a material pressure to air pressure ratio of approximately 25 to 1. 13. Set both pressure regulators as required. 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. [. . . ] Flush the cavity in the pump base with gun cleaner and wipe the cavity clean, using caution not to push foreign matter into the ball seat. Install the screen screw assembly into the pump base by inserting the screen screw with the threaded portion sliding along the top cavity. This prevents foreign matter from entering into the ball seats. Thread the screen screw securely into the pump base. 2. 3. [. . . ]