GUSMER H-20/35 Operating Manual

20/35 VR Series

Proportioning

"Success through Unity"

H-

Unit

Operating Manual

NOTICE: This manual contains important information about your GUSMER equipment. Read and retain for future reference.

GUSMER CORPORATION ®

A Subsidiary of Gusmer Machinery Group, Inc.

Lakewood, New Jersey, USA 08701-8055

Toll Free 1-800-367-4767 (USA & Canada)

42942-VR-1

December 19, 2002

Issue 1

One Gusmer Drive

Phone: (732) 370-9000

Fax: (732) 905-8968

http://www.gusmer.com

H-20/35 VR Series Proportioning Unit

NOTICE: The equipment described in this technical manual must only be operated or serviced by properly trained individuals, thoroughly familiar with the oper ating 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 o f any kind expre ssed or implied. Statements or suggestio ns conce rning possib le use o f 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. The user should not assume that all safety measures are indicated or that other measures may not be required.

2 42942-VR-1, Issue 1

Operating Manual Contents

LIST OF FIGURES..........................................................................................................4

WARRANTY ....................................................................................................................5

GENERAL SAFETY INFORMATION..........................................................................6

CCEPTABLE EQUIPMENT USES

PERATIONAL SAFETY PROCEDURES

DESCRIPTION.................................................................................................................8

SPECIFICATIONS.........................................................................................................16

INITIAL MACHINE SET-UP.......................................................................................17

RATIO ADJUSTMENT.................................................................................................25

ATIO ADJUSTMENT PROCEDURES

OPERATION..................................................................................................................27

AILY START-UP PROCEDURES

AILY SHUT-DOWN PROCEDURES

TROUBLESHOOTING.................................................................................................29

ENERAL INFORMATION

.......................................................................................6

...............................................................................7

................................................................................25

.....................................................................................27

.................................................................................28

................................................................................................29

OSE HEAT SYSTEM

Solutions ...................................................................................................................30

RIMARY HEATERS

Solutions ...................................................................................................................34

ROPORTIONING SYSTEM

Solutions ...................................................................................................................36

YDRAULIC DRIVE SYSTEM

Solutions ...................................................................................................................40

MAINTENANCE............................................................................................................41

RIMARY HEATERS

Heating Element Replacement..................................................................................41

Thermocouple Replacement......................................................................................42

ROPORTIONING SYSTEM

Proportioning Pumps................................................................................................42

Pump Bases............................................................................................................... 43

NLET STRAINER SCREEN

UMP LUBE SYSTEM

YDRAULIC DRIVE SYSTEM

APPENDIX......................................................................................................................46

......................................................................................................30

........................................................................................................33

...............................................................................................35

..........................................................................................39

........................................................................................................41

...............................................................................................42

...............................................................................................43

......................................................................................................44

..........................................................................................45

INSTRUCTION MANUAL DISCREPANCY REPORT............................................47

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H-20/35 VR Series Proportioning Unit

LIST OF FIGURES

IGURE

1. M

IGURE

AJOR COMPONENTS

2. T

RANSFORMER COMPARTMENT ELECTRICAL COMPONENTS

3. E

LECTRICAL CONSOLE COMPONENTS

4. T

YPICAL INSTALLATION

5. M

AIN POWER CONNECTION

6. G

ROUND LUG

7. H

YDRAULIC FLUID LEVEL

8. L

UBE RESERVOIR INSTALLATION

9. I

SOLATION HOSE CONNECTIONS

10. H

EATED HOSE ASSEMBLY CONNECTIONS

11. T

EMPERATURE SENSING UNIT

12. T

EMPERATURE CONTROLLER

13. T

AP SETTINGS

.................................................................................................18

.......................................................................................8

.............................12

..............................................................14

...................................................................................17

............................................................................18

...............................................................................19

......................................................................19

........................................................20

(TSU)..............................................................21

.........................................................................23

................................................................................................24

IGURE

14. H

OSE HEAT POWER SET

15. H

OSE HEAT CIRCUIT BREAKER

16. T

ERMINAL JUMPER STRIP INSTALLATION

17. P

RIMARY HEATER

18. P

RIMARY HEATER CIRCUIT BREAKERS

19. P

ROPORTIONING SYSTEM

20. H

YDRAULIC MANIFOLD

21. M

OTOR CIRCUIT PROTECTOR

22. T

HERMOCOUPLE COMPONENTS

23. Y S

TRAINER COMPONENTS

.................................................................................30

..........................................................................................33

...............................................................................35

..................................................................................38

.............................................................................44

.......................................................................31

.........................................................32

............................................................34

.........................................................................40

.....................................................................42

4 42942-VR-1, Issue 1

Operating Manual Warranty

Gusmer Corporation (Gusmer) provides a limited warranty to the original purchaser (Customer) of

WARRANTY

Gusmer manufactured parts and equipment (Product) against any defects in material or workmanship for a period of one year from the date of shipment from Gusmer facilities.

In the event Product is suspected to b e defective in mat er i al o r workmanshi p , it must be retu rned to Gusmer, freight prepaid. If Product is found to be defective in material or workmanship, as determined so lely by Gusmer, Gusmer wil l issue full credit to Cu stomer for the freight charges incurred in returning the defective Product, and either credit will be issued for the replacement cost of the Product or a repl acement part will be forwarded no-charge, freight prepaid to Customer.

This warranty shall not apply to Product Gusmer finds to be defective resulting from: installation, use, maintenance, or procedures not accomplished in accordance with our instructions; normal wear; acciden t; negligence; alt erations not autho rized in writing by Gus mer; use of “look al ike” parts not manufactured or supplied by Gusmer; or Product used in conjunction with any other manufacturer's pumping or proportioning equipment. Further, the terms and conditions of this warranty shall not apply to services or repairs made to Product by any third party not authorized in writing by Gusmer. For such Product, a written estimate will be submitted to Customer at a nominal service charge, itemizing the cost for repair. Disposition of Product will be done in accordance with the terms stated on the writ te n estimate.

The warranty provisions applied to product that are not manufactured by Gusmer will be solely in accordance with th e warranty provided b y the or iginal manufacturer of the pro du ct .

GUSMER M AKES NO WAR RANTY WHATS OEV ER AS TO THE ME RCH ANTABI LI TY OF, OR SUITABILITY FOR, ITS PRODUCT TO PERFORM ANY PARTICULAR PURPOSE. CREDIT FOR, OR REPLACEMENT OF, PRODUCT DEFECTIVE IN MATERIAL OR WORKMANSHIP SHALL CONSTITUTE COMPLETE FULFILLMENT OF GUSMER OBLIGATIONS TO CUSTOMER. NO OTHER WARRANTY, EXPRESS OR IMPLIED ON ANY PRODUCT IT MANUFACTURES AND/OR SELLS, WILL BE RECOGNIZED BY GUSMER UN LES S SAI D WAR RANTY IS IN WRI TING AN D AP PROV ED BY AN OFF ICER OF GUSMER.

Under no circumstances shall Gusmer be liable for loss of prospective or speculative profits, or special, indirect, incidental or consequential damages. Further, Gusmer shall have no liability for any expenses including, but not limited to personal injury or property damage resulting from failure of performance of the product, use of the product, or application of the material dispensed through the product. Any information provided by Gusmer that is based on data received from a third source, or that p ertains to produ ct not manufactur ed by Gusmer, whil e believed to be accurate and reliable, is presented without guar an t ee, warranty, or respo n sibility of any kind, express or imp lied.

Gusmer through the sale, lease, or rental of Product in no way expresses or implies a license for the use of, nor encourag es the infringem ent of any patents or lice n ses.

To insure proper validation of your warranty, please complete the warranty card and return it to Gusmer within two weeks of receipt of equipment.

Revised 11/12/98

12/19/02 5

H-20/35 VR Series Proportioning Unit

GENERAL SAFETY INFORMATION

It is necessary to understand and follow the instructions in this manual to ensure proper and safe operation of the equipment.

As with most mechanical equipment, certain safety precautions must be taken when the equipment discussed in this manual is operated or serviced. Severe bodily injury or damage to equipment and property may result if the instructions and precautions listed throughout this manual are not followed.

Needless to say, sufficient guidelines cannot be developed to eliminate the need for good common sense in the use and servicing of this equipment, and in the use and application of the products, this equipment has been designed to process. Users of this equipment must therefore, make their own determination as to the suitability of the information contained in this manual to their specific operation and requirements. There should be no assumption made that the safety measures and instructions contained herein are allinclusive, and that other safety measures may not be required for specific use or application.

The following safety guidelines are generally applicable to the safe and efficient use of the equipment.

Acceptable Equipment Uses

The equipment is designed for the dispensing of polyurethane foams, two-component coating systems, and some two-component epoxy systems, specifically polyureas. Under no circumstances should any acid or corrosive chemicals be used in the unit. Consult GUSMER if there is any doubt about the compatibility of the chemical system to be used in this equipment.

Any use of this equipment other than as indicated above constitutes misuse unless express written approval is obtained from GUSMER.

6 42942-VR-1, Issue 1

Operating Manual General Safety Information

Operational Safety Procedures

This safety information will not be repeated in the text of this manual. The symbols

pertaining to this information will appear where appropriate to alert the operator to potential hazards.

Solvents and Chemicals

High Voltage

High Pressure

Personal Protective

Equipment

WARNING: T

OPERATOR TO CERTAIN HAZARDS TAKEN SO AS TO AVOID EXCEEDING THE BEING USED

(OSHA)

PROTECTION AND PROPER HANDLING FROM THE SUPPLIER OF SUCH CHEMICALS

WARNING:

THE ELECTRIC CONSOLES OR OTHERWISE SERVICE THIS EQUIPMENT AND/OR EQUIPMENT USED WITH IT BEFORE SWITCHING OFF THE MAIN POWER DISCONNECT AND INTERRUPTING SUPPLY VOLTAGE AT THE SOURCE A QUALIFIED ELECTRICIAN

WARNING:

CHEMICAL COMPONENTS CAPABLE OF PRODUCING UP TO BODILY INJURY FROM INJECTION OF FLUID COMPONENTS WITHOUT BLEEDING ALL PRESSURES TO ZERO

WARNING:

WHEN OPERATING, SERVICING, OR BEING PRESENT IN THE OPERATIONAL ZONE OF THIS EQUIPMENT SAFETY SHOES, AND RESPIRATORY EQUIPMENT AS REQUIRED

HE SOLVENTS AND CHEMICALS USED WITH THIS EQUIPMENT EXPOSE THE

. A

DEQUATE PERSONAL PROTECTIVE MEASURES MUST BE

HRESHOLD LIMIT VALUE

AS ESTABLISHED BY THE OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION

OR OTHER QUALIFIED AGENCY

. O

BTAIN INFORMATION CONCERNING PERSONAL

(TLV)

OF THE PRODUCTS

TO PREVENT SERIOUS BODILY INJURY FROM ELECTRICAL SHOCK, NEVER OPEN

. T

HE ELECTRICAL SERVICE MUST BE INSTALLED AND MAINTAINED BY

THIS EQUIPMENT HAS OR IS USED WITH EQUIPMENT THAT HAS HYDRAULIC AND

3500

PSI

. T

O AVOID SERIOUS

NEVER OPEN OR SERVICE ANY CONNECTIONS OR

TO AVOID SERIOUS BODILY INJURY, PROPER PROTECTIVE GEAR MUST BE WORN

. T

HIS INCLUDES, BUT IS NOT LIMITED TO, EYE AND FACE PROTECTION, GLOVES

WARNING: T

TEMPERATURE COMPONENTS SUCH AS PRIMARY HEATERS AND HEATED HOSES SERIOUS BODILY INJURY FROM HOT FLUID OR HOT ME TAL EQUIPMENT BEFORE ALLOWING IT TO COOL

HIS EQUIPMENT HAS OR IS USED WITH EQUIPMENT THAT HAS HIGH

. T

NEVER ATTEMPT TO SERVICE THE

O PREVENT

High Temperature

WARNING:

PERSONAL INJURY AND/OR DAMAGE TO THE EQUIPMENT FROM ONE OR MORE OF THE ABOVE LISTED HAZARDS

FAILURE TO READ AND FOLLOW THIS SAFETY INFORMATION MAY RESULT IN

Warning

12/19/02 7

H-20/35 VR Series Proportioning Unit

DESCRIPTION

Figure 1. Major Components

8 42942-VR-1, Issue 1

Operating Manual Description

1. MAIN POWER DISCONNECT- Controls power to all circuits. Must be ON for

any function of the proportioning unit to operate. The disconnect can be locked in the OFF position for OSHA required lockout/tagout during machine maintenance.

2. MAIN POWER LIGHT (WHITE)- Lights up when the Main Disconnect Switch is

in the ON position and the control power transformer is operational.

3. CONTROL POWER SWITCH- Turns the unit’s 120VAC control power circuit on

and off. In the ON position, the amber light within the switch lights up. Removal of control power stops all machine operation including motion and heating.

4. EMERGENCY STOP SWITCH- Interrupts the units control power circuit to stop

all motion and heating. Switch mechanically locks in the stop position. Turn the switch clockwise to reset it and restore normal operation.

5. HYDRAULIC MOTOR SWITCH- Controls power to motor circuit. In the ON

position, the green light within the switch lights up.

6. POLYOL COUNTER- Records the cycle count of the Polyol proportioning pump.

One cycle equals two strokes (one in each direction); used to determine ratio.

7. ISOCYANATE COUNTER- Records the cycle count of the Isocyanate

proportioning pump. One cycle equals two strokes (one in each direction); used to determine ratio.

8. PUMP MODE SWITCH- Controls operation of the proportioning pump Hydraulic

Drive System

• RUN- Should be in this position for the pump system to operate properly.

This position is used for all normal operation of the pump system, while dispensing chemical. Hydraulic system will be energized when a special dispensing gun is triggered.

• RETRACT- The pump system is energized so that the Isocyanate pump

shaft is retracted into the pump cylinder. This shields the Isocyanate pump shaft from air to limit crystallization during periods of machine inactivity. The retract position should be used during any period of machine inactivity

• SERVICE – With the recirculating ball valves open, the pump system is

energized and ratio can be determined with the counters or material can be conditioned. With the recirculating ball valves closed, the system will build pressure.

9. ISOCYANATE RECIRCULATING BALL VALVE – Ball valve on the Iso

material that either allows the system to recirculate chemical back to the chemical drums during Service Pump Mode or prevents chemical from returning to the chemical drums during Run Pump Mode.

10. POLYOL RECIRCULATING BALL VALVE – Ball valve on the Polyol material

that either allows the system to recirculate chemical back to the chemical drums during Service Pump Mode or prevents chemical from returning to the chemical drums during Run Pump Mode.

12/19/02 9

H-20/35 VR Series Proportioning Unit

11. ACTIVATOR PLATE – Works with the reversing switches to change pump

direction.

12. HYDRAULIC PUMP (ISOCYANATE) – Hydraulic pump that supplies the

pressure and flow rate to the hydraulic drive system that attaches to the Isocyanate proportioning pump.

13. HYDRAULIC PUMP (POLYOL) – Hydraulic pump that supplies the pressure and

flow rate to the hydraulic drive system that attaches to the Polyol proportioning pump.

14. HYDRAULIC PUMP FLOW ADJUSTMENT (ISOCYANATE) – Adjustme nt

allows the flow rate of the hydraulic pump to be increased or decreased, which increases or decreases output of the Isocyanate pump.

15. HYDRAULIC PUMP FLOW ADJUSTMENT (POLYOL) – Adjustment allows

the flow rate of the hydraulic pump to be increased or decreased, which increases or decreases output of the Polyol pump. (Not Shown)

16. HYDRAULIC PUMP PRESSURE CONTROL ADJUSTMENT (ISOCYANATE) – Controls the hydraulic pressure available to the Hydraulic Drive System. This adjustment must be set high enough so the pump will not reduce flow rate for the Isocyanate pump.

17. HYDRAULIC PUMP PRESSURE CONTROL ADJUSTMENT (POLYOL) – Controls the hydraulic pressure available to the Hydraulic Drive System. This adjustment must be set high enough so the pump will not reduce flow rate for the Polyol pump.

18. HOSE HEATER SWITCH- Energizes the Hose Heat System circuit. In the ON position, the green light within the switch lights up.

19. HOSE HEAT TEMP ERATURE CONTROLLER- Digital display of controller will be energized when Control Power Switch is activated. Controller will display set point temperature. Press the “SET” button to display the process temperature. Display will shift back to set point after 10 seconds. The Hose Heater Switch must be in the ON position before heating process will begin.

20. ISOCYANATE PRIMARY HEATER SWITCH- Energizes the Iso Primary Heater system circuit. In the ON position, the green light within the switch lights up.

21. ALARM- Audible alarm that sounds when a low or over-pressure condition occurs.

22. ALARM RESET- Momentary switch that silences alarm after a low or overpressure condition occurs.

23. ISOCYANATE PRIMARY HEATER TEMPERATURE CONTROLLER- Digital display of controller will be energized when Control Power Switch is activated. Controller will display set point temperature. Press the "SET" button to display the process temperature. Display will shift back to set point after 10 seconds. Iso Primary Heater Switch must be in the ON position before heating process will begin.

10 42942-VR-1, Issue 1

Operating Manual Description

24. POLYOL PRIMARY HEATER SWITCH- Energizes the Polyol Primary Heater system circuit. In the ON position, the green light within the switch lights up.

25. POLYOL PRIMARY HEATER TEMP ERATURE CO NTROLLER- Digital display of controller will be energized when Control Power Switch is activated. Controller will display set point temperature. Press the "SET" button to display the process temperature. Display will shift back to set point after 10 seconds. Polyol Primary Heater Switch must be in the ON position before heating process will begin.

26. HOSE HEAT AMMETER- Displays the amperage (power) flowing in the Hose Heat System.

27. HOSE HEAT POWER SET- Controls and adjusts the amount of amperage in the Hose Heat System. Loosen lock nut before adjusting potentiometer. Tighten lock nut after adjustment is completed.

28. POLYOL OVER-PRESSUR E SA FETY SWITCH- Turns off the Hydraulic Drive System when the Polyol Proportioning Pump exceeds the safe pressure limitation.

29. ISOCYANATE OVER-PRESSURE SAFETY SWITCH- Turns off the Hydraulic Drive System when the Isocyanate proportioning pump exceeds the safe pressure limitation.

30. POLYOL LOW-PRESSURE SAFETY SWITCH- Turns off the Hydraulic Drive System when the Polyol proportioning pump falls below 40 psi. (Not Shown)

31. ISOCYANATE LOW-PRESSURE SAFETY SWITCH- Turns off the Hydraulic Drive System when the Isocyanate proportioning pump falls below 40 psi.

32. POLYOL PRESSURE GAUGE- Indicates the pressure in the Polyol proportioning system.

33. ISOCYANATE PRESSURE GAUGE- Indicates the pressure in the Isocyanate proportioning system.

34. POLYOL INLET PRESSURE GAU GE- Indicates the inlet pressure prior to the Polyol proportioning system.

35. ISOCYANATE INLET PRESSURE GAUGE- Indicates the inlet pressure prior to the Isocyanate proportioning system

36. POLYOL BULKHEAD RECIRCULATING FITTING- Fitting provides a means of returning chemical back to drum via a return hose. (Not Shown)

37. ISOCYANATE BULKHEAD RECIRCULATING FITTING- Fitting provides a means of returning chemical back to drum via a return hose.

38. POLYOL INLET SUPPLY B ALL VALVE- Allows delivery of Polyol to the proportioning unit. (Not Shown)

39. ISOCYANATE INLET SUPPLY BALL VALVE- Allows delivery of Isocyanate to the proportioning unit.

40. HYDRAULIC PRESSURE GAUGE - Indicates the pressure in the Hydraulic Drive System for the Isocyanate pump.

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H-20/35 VR Series Proportioning Unit

41. HYDRAULIC PRESSURE GAUGE- Indicates the pressure in the Hydraulic Drive System for the Polyol pump.

42. HYDRAULIC TANK LEVEL GAUGE- Shows the level of oil in the tank.

43. LUBE PUMP SYSTEM (Iso side only)- Continuously circulates Pump Lube t o prevent the crystallization of Isocyanate on the pump shaft.

44. HYDRAULIC DIRECTIONAL VALVE (ISO) - Controls the direction of hydraulic flow.

45. HYDRAULIC DIRECTIONAL VALVE (POLYOL) - Controls the direction of hydraulic flow.

46. HOSE HEAT POWER LOCK CONNECTOR- Provides power to the Heated Hoses.

47. TSU HARNESS- Carries the electrical signal from the TSU Sensor in the Iso Hose to the Hose Heat Temperature Controller.

48. HOSE HEAT SYSTEM SOLID STATE RELAY (SSR)- The Hose Heat System SSR is controlled by the Hose Heat Temperature Controller. The SSR acts as a switch allowing current to flow in the Hose Heat System Heating Element as required by the Temperature Controller.

49. HOSE HEAT SSR JUMPER- The jumper is used to bypass the hose heat system SSR in the event that the SSR fails. This allows continued to operation of the machine by running the Hose Heat System manually. (See step 10 on page 32.)

Figure 2. Transformer Compartment

Electrical Components

50. HOSE HEAT SYSTEM CIRCUIT BREAKER- A 50-amp circuit breaker that protects the Hose Heat System by limiting current to the Hose Heat Element.

51. CONTROL CIRCUIT TRANSFORMER- Steps down the incoming line voltage to 120 VAC for use by the control circuit system.

52. PHASE CONTROLLER- Used in conjunction with the hose heat transformer tap settings to adjust and fine tune the amperage supplied to the hose heat system heating elements.

53. HOSE HEAT SYSTEM TRANSFORMER- Steps down incoming line voltage to lower voltages used t o heat various lengths of ho se.

54. HOSE HEAT SYSTEM TERMINAL BLOCK ASSEMBLY- Used to select hose heat voltage of 15, 30, 45, 60, 75, or 90 VAC for various lengths of hose. (See step 16 on page 24.)

12 42942-VR-1, Issue 1

Operating Manual Description

12/19/02 13

H-20/35 VR Series Proportioning Unit

14 42942-VR-1, Issue 1

Figure 3. Electrical Console Components

Operating Manual Description

55. CONTROL MAIN TERMINAL BLOCK- Termination/distribution point for control system component wires.

56. CONTROL TRANSFORMER SECONDARY CIRCUIT BREAKER- Provides over-current protection for the control transformer secondary 120-volt AC output.

57. MASTER RELAY- Controls distribution of 120 volt AC to control power system. The Control Power Switch energizes the relay.

58. ISOCYANATE HEATER CONTROL RELAY- Controls distribution of line voltage Iso Primary heater circuit. The Iso Primary Heater Temperature Controller controls the relay.

59. POLYOL PRIMARY HEATER CONTROL RELAY- Controls distribution of line voltage to Polyol Primary heater circuit. The Polyol Primary Heater Temperature Controller controls the relay.

60. MOTOR CONTACTOR- Supplies line voltage to electric motor. The Hydraulic Motor Switch controls the contactor.

61. ISOCYANATE PRIMARY HEATER CONTACTOR- Supplies line voltage to the Iso Primary Heater. The Iso Primary Heater Switch controls the contactor.

62. POLYOL PRIMARY HEATER CONTROL CONTACTOR- Supplies line voltage to the Polyol Primary Heater, which controls the contactor.

63. HOSE HEAT CONTACTOR- Supplies line voltage to Hose Heat System. The Hose Heater Switch controls the contactor.

64. MOTOR CIRCUIT PROTECTOR- Provides thermal overload and over-current protection for the hydraulic motor circuit.

65. ISOCYANATE HEATER CIRCUIT BREAKER- Provides over-current protection for the Iso Primary Heater circuit.

66. POLYOL PRIMARY HEATER CIRCUIT BREAKER- Provides over-current protection for the Polyol Primary Heater circuit.

67. HOSE HEAT TRANSFORMER PRIMARY CIRCUIT BREAKER- Provides over-current protection for the Hose Heat Transformer Primary circuit.

68. CONTROL TRANSFORMER PRIMARY CIRCUIT BREAKER- Provides over-current protection for the hose transformer primary circuit.

69. POWER DISTRIBUTION BLOCK- Provides power distribution point for incoming line voltage to the circuit breaker bank.

70. MAIN POWER DISCONNECT (Inside View)- Provides termination point for incoming power. Disconnects incoming power from machine circuits.

71. GUN/PUMP CONTROL RELAY- Enables the pump directional valves to operate when the gun is triggered.

72. ALARM RELAY – Controls the operation of the Audible Alarm and disables the pump circuit when an over- or under-pressure condition occurs.

73. DISPENSING GUN FUSE – ½ amp fuse to protect the gun trigger circuit

12/19/02 15

+ 33 hidden pages

GUSMER H-20/35 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

LIST OF FIGURES

WARRANTY

GENERAL SAFETY INFORMATION

Acceptable Equipment Uses

Operational Safety Procedures

DESCRIPTION