Jackson HT-2 Service Manual

HT-1 & HT-2

INSTALLATION && OOPERATION

MANUAL

December 21, 2001 P/N 7610-002-54-60 (REV. A)

Visit Jackson on the Internet at:

www.jacksonmsc.com

CHEMICAL DISPENSING UNIT

SECTION DESCRIPTION PAGE

I. Installation / Operation Instructions HT-1 1 II. Installation / Operation Instructions HT-2 2 III. Chemical Dispensing Epquipment HT-1 3 IV. Chemical Dispensing Epquipment HT-2 4 V. Cam Timer Operation HT-1 5 VI. Cam Timer Operation HT-2 6 VII. Drawings

HT-1 Assembly 7 HT-2 Assembly 9 Inner Panel Assembly 11 Peristaltic Pump Assembly 12

VIII. Electrical Diagrams

HT-1 Interconnect Diagram 13 HT-2 Interconnect Diagram 14 HT-1 Schematic 15

HT-2 Schematic 16 IX. Jackson Maintenance & Repair Centers 17 X. Important Information Data Sheet 22

TABLE OF CONTENTS

FOR SERVICE PERSONNEL: Jackson MSC Inc. provides technical support for the chemical dispensing equipment detailed in this manual. We strongly recommend that you refer to this manual before making a call to our technical support staff. Please have this manual with you when you call so that our staff can refer you, if necessary, to the proper page. Technical support is available from 8:00 a.m. to 5:00 p.m. (EST), Monday through Friday. Technical support is not available on holidays. Contact technical support toll-free at 1-888800-5672. Please remember that technical support is available for service personnel only. Non-service personnel should refer to the list of provided service agencies in this manual for local service support.

The JP-24B dishmachine is a “DUMP AND FILL” type unit that dumps (drains) the wash water after each washing cycle. Water added from the fresh water final rinse is used for the next washing cycle.

Mount the chemical dispenser unit in a convient location on the wall. The following instructions apply only to the model HT-1single pump package for the model JP-24 series dishmachines.

DISPENSING EQUIPMENT- ELECTRICAL CONNECTION.

Power and signal source for the detergent and rinse aid are provided as follows: DETERGENT SIGNAL-white/red wire, signal (line voltage) for detergent dispensing. Connected between the normally closed contact

(N.C.) of C6 cam and the Detergent Pump Motor (SM) also connecting to the Detergent Prime Switch (S4). Detergent will be dispensed during the rinse cycle.

DISPENSER POWER-White wire (line voltage). Connected between Detergent Primer Switch (S4) and the On/Fill-Off/Drain Switch

(S1).

All conduit and wiring for the interconnections is shipped pre-mounted to the HT-1Chemical Dispensing Equipment. For connections to the dishmachine the wires terminate with butt splice connectors. When installing the Chemical Dispensing wiring match the correct wire colors then crimp the connectors.

Detergent Recommendations:

We suggest that you contact your local detergent specialist for the correct detergent for your area.

Very Important: Do not use a domestic type detergent in this machine at any time. This type of detergent may damage and/or obstruct pump operation or cause corrison in the tank.

Liquid Detergent Dispensing Point:

Liquid detergent will be dispensed into machine from factory supplied hole at back of the tub above the basket strainer. Remove factory installed plug and install injector fitting for the detergent.

imer Adjustment for Detergent Concentration:

The amount of detergent may need to be increased or decreased depending on water quality and type of detergent. It is factory set to dispense 15 milliliters of detergent into the wash water during the rinse cycle. Consult your detergent representative for adjustment.

VOLTAGE CHECK: Ensure that the power switch is in the OFF position and apply power to the dishmachine. Check the incoming power at the terminal block and ensure it corresponds to the voltage listed on the data plate of the dishmachine. If not, contact a qualified service agency to examine the problem. Do not run the dishmachine if the voltage is too high or too low. Shut off the service breaker and mark it as being for the dishmachine. Advise all proper personnel of any problems and of the location of the service breaker. Replace the front kick panel and tighten down the screws

INSTALLATION / OPERATION INSTRUCTIONS HT-1

The dishmachine is a “DUMP AND FILL” type unit that dumps (drains) the wash water after each washing cycle. Water added from the fresh water final rinse is used for the next washing cycle.

Detergent Recommendations and Rinse Additives:

We suggest that you contact your local detergent specialist for the correct deter-

gent and rinse additives for your area.

ery Important: Do Not use a domestic type detergent in this machine at any time. This type of detergent may damage and/or obstruct

pump operation or cause corrison in the tank. The following instructions apply only to the model HT-2 double pump package for the model JP-24 series dishmachine.

DISPENSING EQUIPMENT- ELECTRICAL CONNECTION.

(N.C.) of C6 cam and the detergent terminal of the Speed Control Circuit Board (SC). Detergent will be dispensed during the rinse

cycle. DISPENSER POWER-red wire, (line voltage) Connected between “L2” and the “C” terminal on the step-down transformer in the HT2 box. DISPENSER POWER-white wire (line voltage). Connected between “L1” and the appropiate line voltage terminal on the step-down

transformer in the HT-2 box. RINSE AID SIGNAL-Blue wire, (line voltage). Signal for dispensing the rinse aid. Connected between the normally closed contact

(N.C.) of the C5 cam and the rinse aid terminal of the Speed Control Circuit Board (SC). Rinse aid will be injected into the final rinse

line during the rinse cycle. All conduit and wiring for the interconnections is shipped pre-mounted to the HT-2 Chemical Dispensing Panel.

For connections to the dishmachine the wires terminate with butt splice connectors. When installing the Chemical Dispensing wiring match the correct wire colors then crimp the connectors.

Liquid Detergent Dispensing Point:

Liquid detergent will be dispensed into machine from factory supplied hole at back of the tub above the basket strainer. Remove factory installed plug and install injector fitting for the detergent.

Rinse Additive Injection-Final Rinse Line:

Rinse Aid will be injected into the final rinse line at the rear of the machine. Remove one of the 1/4” plugs from the line and install the rinse aid injector fitting.

imer Adjustment for Detergent Concentration:

INSTALLATION / OPERATION INSTRUCTIONS HT-2

TO PREPARE PUMPS FOR OPERATION

The HT-1 is a chemical dispensing unit supplied with detergent pumps. Locate the open end of the chemical tube with the tube stiffeners and place in the appropriate container.

A. Red Tubing = Detergent

PRIMING PERISTALTIC PUMP

The chemical feeder pump needs priming when the machine is first installed or if for some reason the chemical line has been removed and air has been allowed to enter.

CAUTION: Water must be in the sump and wash tank prior to the dispensing of the chemical.

1. Verify that the chemical tube stiffener inlet is in the detergent container.

2. Use the toggle switch on the front of the dispenser box to prime the pump.

3. To prime the pump, hold the switch in the momentary position until chemical can be observed entering the tub.

4. Detergent is dispensed as required during the wash cycle by the cam timer. The amount of detergent may need to be increased or decreased depending on water quality and type of detergent. It is adjusted by changing Cam 6 on the cam timer. See the timer instructions on Page 5.

WARNING: Some of the chemicals used in dishwashing may cause chemical burns if they come on contact with your skin. Wear appropriate protective gear when handling these chemicals. If you do come in contact with these chemicals flush the area with fresh water.

CHEMICAL DISPENSING EQUIPMENT HT-1

JP-24 Series Dishmachine

TO PREPARE PUMPS FOR OPERATION

The HT-2 is a chemical dispensing unit supplied with detergent and rinse additive pumps. Locate the open ends of the chemical tubes with the tube stiffeners and place each one in the appropriate container.

A. Red Tubing = Detergent B. Blue Tubing = Rinse Aid

PRIMING PERISTALTIC PUMPS

Chemical feeder pumps need priming when the machine is first installed or if for some reason the chemical lines have been removed and air has been allowed to enter.

CAUTION: Water must be in the sump and wash tank prior to the dispensing of chemicals.

1. Verify that the proper chemical tube stiffener inlet is in the proper container.

2. Use the toggle switches on the front of the dispenser box to prime each pump. There is one (1) switch mounted above each peristaltic pump. One will prime the detergent pump, and the second will prime either the rinse aid pump.

3. To prime the pumps, hold the switch in the momentary position until chemical can be observed entering the tub.

5. Rinse additive is dispensed as required into the final rinse. The amount of rinse aid may need to be adjusted depending on water hardness and results. It can be changed by changing Cam 5 on the cam timer. See the timer instructions on Page 6.

CHEMICAL DISPENSING EQUIPMENT HT-2

JP-24 Series Dishmachine

The JP-24B cam timer is a 2 minute 6 cam timer with an OFFDRAIN function.

The following is a description of set points for each cam and function for each switch.

CAM 1: Cam 1 is a cut cam with a single notch and serves as the Cycle/Reset.

FUNCTION: When the machine is in the operation mode the notch is the home position. The machine will set idle until the door is opened, then cam 1 moves to the start position and holds until the door is closed. The closing of the door will start the next cycle. The cam will rotate a complete cycle and back to the home position and hold.

CAM 2: Cam 2 is a cut cam and provides the off/drain function. FUNCTION: The function of the off/drain cam is controlled by the

power switch. When the power switch is in the ON position the off/drain function is disabled. To use the off/drain, start a cycle and place the power switch in the OFF position. The machine will run a wash cycle, drain and stop. The machine will hold this state of operation until the power switch is turned on, when turned on the machine will fill, run a rinse cycle and stop at the home position.

The off/drain cam works off the normally open contacts of cam 2. This requires the switch to be held closed by the cam. The off/drain cam switch will pick up just after the cycle cam switch and drop back down just after the wash cycle cam switch.

CAM 3: Cam 3 is a cut cam and controls the wash and rinse cycles.

FUNCTION: The wash and rinse cam works off the normally open contacts of cam 3. This requires the switch to be held closed by the cam. The wash/rinse cam switch will pick up just after the cycle cam switch and drop back down just before the off/drain cycle cam switch. Wash pump will run approximately 58 seconds. The machine will drain and fill. The rinse cycle will start after the fill, approximately at the 82 second mark and will last 35 seconds. The machine will then return to the home position.

NOTE: The last 3 cams are adjustable. The following instructions will require that the timer position have the cams to the front and the motor to the left.

CAM 4: Cam 4 is an adjustable cam and controls the drain valve. FUNCTION: The drain valve cam works off the normally closed

contacts of cam 4. This requires the switch to be held open by the cam and allowed to drop into the notch to operate the drain valve. The pumped drain and fill cams require adjustment due to varying water pressure. The drain must be adjusted to remove whatever water the fill brings into the machine.

SETTINGS: The right side of cam 4 must be set to pick up the switch arm just before the wash cycle cam switch drops. If the drain valve does not close first the water in the drain hose will back up into the pump housing and wash tank.

Any adjustment made to the drain should be made with the left side of cam 4. The adjustment must be moved back into the wash time until all water is drained from the wash tank.

CAM 5: Cam 5 is an adjustable cam and controls the fill valve. FUNCTION: The fill valve cam works off the normally closed con-

tacts of cam 5. This requires the switch to be held open by the cam and allowed to drop into the notch to operate the fill valve. The pumped drain and fill cams require adjustment due to varying water pressure. Cam 5 must be adjusted to fill the wash tank to the proper operating water level. (Remember, the drain cycle must remove what the fill cycle brings in.)

SETTINGS: The left side of cam 5 must be set to drop in just past the stop point of the off/drain cam. There must be a dwell between the off/drain and the fill, so that the fill will not run while the machine is in the off state.

Any adjustment made to the fill should be made with the right side of cam 5. Proper water level will be achieved when the water touches the bottom of the strainer pan.

CAM 6: Cam 6 is an adjustable cam and controls the detergent pump.

FUNCTION: The detergent pump cam works off the normally closed contacts of cam 6. This requires the switch to be held open by the cam and allowed to drop into the notch to operate the pump.

SETTINGS: The left side of cam 6 must be set to drop in just past the starting point of the wash cam. The adjustment for detergent volume must be made with the right side of the cam.

CAM TIMER OPERATION FOR HT-1

+ 16 hidden pages