User manual GRACO FF-3000 32942-1

[. . . ] Model FF-3000 Proportioning Unit Operating Manual 32942-1 April 7, 2004 Issue 2 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-3000 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. 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. [. . . ] Pressurize the transfer pumps and open both A and R-inlet supply valves. 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. 9. NOTE: As the hoses warm up, the amperage will drop slightly and will not need readjusting. Turn the hose heat power control full counterclockwise. Switch ON the hose heat circuit breaker. The amber pilot light should be on. 10. Adjust the hose heat power control clockwise to 45-50 amps for quick warm-up. (Do not exceed 50 amps. ) Check the hose thermometer for proper spray temperature. (Do not exceed 170°F/76°C. ) Readjust the power control as necessary to maintain temperature. Switch ON the primary heater circuit breaker. The amber pilot light should be on and then cycle to off as the heater comes up to temperature. 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. 4/7/04 19 Model FF-3000 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 52 pumps have a material pressure to air pressure ratio of approximately 33 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. 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. [. . . ] Also, check the chamfer around the cavity to ensure that there are no sharp edges, which could damage the o-ring and prevent proper seal. Remove the valve ball and inspect it for nicks and scratches. Remove the ball seat with the special tool provided and inspect it for nicks and scratches. Replace as required. 30 32942-1, Issue 2 Operating Manual 4. Maintenance Inspect the face of the gasket for damage and replace as required. [. . . ]