User manual GRACO H-20

[. . . ] H-20/35 Pro VR Proportioning Unit Operating Manual 66942-VR-1 September 2, 2004 Issue 1 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. H-20/35 Pro VR 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. [. . . ] Temperature Controller WARNING: THE CONTROLLERS ARE FACTORY PROGRAMMED AND ARE NOT FIELD PROGRAMMABLE. IF YOU ENCOUNTER ANY PROBLEMS WITH A CONTROLLER, CONTACT GUSMER FOR A REPLACEMENT. DO NOT SUBSTITUTE A CONTROLLER FROM AN ALTERNATE SUPPLIER AS ITS USE MAY RESULT IN DAMAGE TO THE EQUIPMENT AND/OR BODILY INJURY. 24 66942-VR-1, Issue 1 Operating Manual Ratio Adjustment RATIO ADJUSTMENT The dual hydraulic system and pumpline of the Pro VR allow the chemical outputs to be adjusted independently of one another. The output or flow rate of each chemical is measured by counting the number of cycles its corresponding pump dispenses per a given amount of time. The position of the flow control adjustment screw, located on each of the hydraulic pumps mounted to the motor, determines this cycle rate, thus controlling the output. The further in the adjustment is, the slower or lower output the system will dispense. The further out the adjustment is, the faster or higher output the system will dispense. Determine that the supply system is at the proper temperature as recommended by the chemical system supplier, the individual chemicals are properly mixed within their drums/day tanks, and the moisture protection system is properly set for operation. The light within the switch and the temperature controllers will light up. If the alarm will not reset, increase the supply pressure to greater that 40 psi. The chemical pumps will move to the retract position and each hydraulic pump pressure gauge will indicate pressure present. Both the iso and resin hydraulic pump pressure gauges should be set to 1200 psi. Adjust the hydraulic pump pressures as required (clockwise to increase, counterclockwise to decrease). 7. 8. 9. NOTE: Factory setting for the unit is approximately 16 lb/min at a ratio of 1:1. 10. Depress the reset button on each of the two cycle counters at the same time and allow the system to cycle for at least one full minute. Compare the number of counts on each side and adjust the iso or resin hydraulic pump flow control adjustment as follows: a) Remove the cover and loosen the locking nut. b) Using the chart below, establish the counts required for the specific output and ratio. c) Turn the adjustment knob (clockwise to decrease output, counterclockwise to increase output). IMPORTANT: Hydraulic pump flow control adjustment should not protrude from the pump more than 1" (25. 4 mm). 9/2/04 25 H-20/35 Pro VR Proportioning Unit IMPORTANT: The orifices in the dispensing gun and the output of each chemical pump will establish the dispensing pressure. If the orifices are fixed, increase the output for a higher dispensing pressure or decrease for a lower dispensing pressure. Cycles per Pump 120 Pump Output lbs. (kg) 1. 56 (. 71) 3. 12 (1. 42) 4. 68 (2. 13) 6. 24 (2. 84) 7. 80 (3. 55) 9. 36 (4. 26) 10. 92 (4. 97) 12. 48 (5. 68) 14. 04 (6. 39) 15. 60 (7. 1) 17. 16 (7. 81) 80 Pump Output lbs. (kg) 1. 04 (. 47) 2. 08 (. 94) 3. 12 (1. 41) 4. 16 (1. 88) 5. 20 (2. 35) 6. 24 (2. 82) 7. 28 (3. 29) 8. 32 (3. 76) 9. 36 (4. 23) 10. 40 (4. 7) 11. 44 (5. 17) 5 10 15 20 25 30 35 40 45 50 55 12. Turn the pump mode switch to RUN. NOTE: Both the locking nut and caps contain o-ring seals. 14. [. . . ] Change the lubricant before it becomes a gel, or when its color darkens as it becomes diluted with isocyanate. The time interval between changes due to gel formation depends on environmental conditions in which the equipment is operating. The enclosed lubrication system of the Pro VR minimizes exposure to moisture, but moisture contamination is still possible. Discoloration of the pump lubricant is due to continual seepage of small amounts of isocyanate past the pump packing during operation. [. . . ]