Oce 4780 service manual

Travel Motor Port Reliefs 1. Install special tool pin sizemm 4. Place travel speed select switch in 2nd speed position. Operate both travel controls together to full forward and hold. Or compare reading in diagnostic check item Travel motor port reliefs are set by the manufacture before shipment. When adjustment is required, loosen 19mm nut and adjust the pressure with 6mm adjusting screw to specification.

Negative control pressure When operating in backup mode. Boom Cylinder Arm Cylinder Bucket Cylinder Test Procedure Swing Speed Test Swing Stopping Test Swing Drift Test NOTE The measuring time of the cylinder cycle does not include the cushion stroke times.

Only measure time up to the beginning of the cushion stroke. The following tools and equipment will be required to perform the cylinder cycle time test: 1. Thermometer to read Hydraulic Oil Temperature. Firm, level testing site. Boom Cylinder Cycle Time Test 1. Move the machine to a firm, level testing area. See Figure 3. Fully extend the Bucket Cylinder. Fully retract the Arm Cylinder. Lower Boom until bucket rests on the ground. Raise Boom extending the cylinders at full stroke of the control and measure the time for the boom cylinder to reach the cushion stroke.

Record the time. Lower the boom retracting cylinders at full stroke and measure the time for the bucket to reach ground level. Repeat steps 5 and 6 two more times and record the stopwatch readings. Fully extend Boom Cylinder. Fully retract Bucket Cylinder. Fully extend the Arm retracting cylinder. At full stroke of the control, bring the arm all the way in extending cylinder and measure the time it takes for the arm cylinder to reach the cushion stroke.

At full stroke of the control, fully extend the arm retracting cylinder and measure the time it takes until the cylinder reaches the cushion stroke.

Repeat steps 6 and 7 two more times. Lower boom until the arm tip is parallel with the boom foot. Bring bucket all the way in. Operate bucket out retracting cylinder at full stroke of control and measure the time it takes for the bucket cylinder to reach the cushion stroke if equipped. See figure 3. Operate the bucket in extending cylinder at full stroke of control and measure the time it takes for the bucket cylinder to reach the cushion stroke if equipped. Repeat steps 7 and 8 two more times.

Measuring tape. Device for marking starting points. Thermometer for hydraulic oil temperature. Cylinder Drift Test 1. Operate the arm out control until arm is completely out retracting cylinder. Operate the bucket out control until bucket is completely out retracting cylinder. Adjust the boom up or down with control until bucket is 1. After three minutes, measure the distances the Boom, Arm and Bucket Cylinders have moved.

Record the distances. Repeat steps 4 through 6 two more times and average the measurements. Compare the average to the Cylinder Drift Specification Chart. Start the engine. Operate the bucket in control until bucket is completely in cylinder extended. Adjust the boom until the tip of the bucket teeth are 1. Measure the distance from the tip of the bucket teeth to ground level and record the reading. Repeat steps 8 through 12 two more times and record the readings. Stopwatch 2.

Device for Marking Starting Point 3. Measuring Tape B. Swing Speed Test 1. Operate the Arm Out Control until arm is completely out retracting cylinder. See Figure 4. Operate the Bucket Out Control until bucket is completely out retracting cylinder. Adjust boom up or down until bucket teeth are 1. After sounding horn and with swing flashers on, operate swing control at full stroke for two complete rotations clockwise. Time the last rotation and record the reading. Bring swing to a complete stop.

Repeat steps 3 through 5 two more times and average the readings. Compare the average to the Swing Speed Specification Chart. Repeat steps 2 through 7 swinging counterclockwise. Device for Marking Starting Point B. Swing Stopping Test 1. Operate the Bucket In Control until bucket is completely in extending cylinder.

After sounding horn and with swing flashers on, operate swing control at full stroke for one complete rotation clockwise. When bucket reaches starting point, release the swing control and allow rotation to completely stop. Measure the degree of angle from the starting point to the stopping point of the bucket. Record the angle degree. Repeat step 6 two more times and average the readings.

Compare to Swing Stop Specification Chart. Device for Marking Starting Point 2. Stopwatch B. Swing Drift Test 1. Operate the Arm Out Control until the arm is completely out retracting cylinder. Adjust the boom up or down until bucket teeth are 1. Stop engine and allow the machine to sit for 20 seconds. Measure the distance the swing drifted, down grade, while sitting. Record the distance. Repeat steps 2 through 6 two more times.

Average the distances and compare average to the Swing Drift Specification Chart. Dial Indicator 2. Magnetic Base Assembly B. Firm, level testing area. Attach the Dial indicator to the mounting area of the swing bearing at the location of a swing bearing mouning bolt. Operate the Bucket Control until bottom of bucket is even with ground level. Adjust the boom up or down until bucket is resting on the ground. With Boom Control, raise the machine until tracks are mm Operate Bucket Control until bucket is completely out and operate boom until bucket teeth are mm Record reading from dial indicator and repeat steps 3 through 9 two more times.

Measuring Tape 2. Device for marking starting point. Move the machine to a firm testing area. Operate the Bucket Control until bucket is completely out retracting cylinder. Operate the Arm Control until arm is completely out retracting cylinder. Operate boom up or down until bucket teeth are 10mm 0. Mark center of bucket with marking device. Make a mark on ground in line with mark on bucket. Manually move bucket to the left and record distance the center of bucket moved to the left of the mark on ground.

Move bucket to the right and record the distance the center of the bucket moved to the right of mark on ground. Hydraulic line wrenches 3. Hydraulic line plugs 4. Hydraulic fitting caps 5. Stopwatch 6. Move machine to a firm, level testing area. Lower the boom until bucket teeth are in ground.

Operate Swing Control in both directions to make certain bucket teeth are in the ground deep enough to stall swing. It May be necessary to set bucket teeth deeper to stall swing. Release hydraulic tank pressure by removing cap from pressure relief valve and depressing relief valve stem. Thoroughly clean all hydraulic lines and fittings before removal.

Do not allow any dirt or debris to enter the open lines or fittings. Thoroughly clean the bucket that the oil is to be drained into. Torque to proper value. Install one hydraulic fitting cap onto fitting at Hydraulic Tank and torque. Place loose end of line into a clean 38 liter 10 gal.

Do not operate Travel!! Record amount of oil in bucket. Record the amount of oil in bucket. If it seems the flow of oil will be high, perform the test for 15 seconds and multiply amount of oil by 4 to compare to chart. If readings are greater than values in chart, refer to Shop Manual for additional instrucs. Remove hydraulic fitting caps and plugs.

Install hydraulic lines back to their original fittings and torque to the proper value. Check hydraulic oil level. Refer to Operators Manual for hydraulic oil level check procedures. Hydraulic line wrenches. Hydraulic fitting cap. Stopwatch 5. Thermometer 6. Install Special Tool into each Sprocket. Operate the Arm In Control until the arm is completely in.

Operate the Bucket In Control until bucket is completely in. Operate the Boom Down Control until boom is completely down. Release hydraulic tank pressure by remoing cap from pressure relief valve and depressing relief valve stem. With special tool installed in each travel motor sprocket, operate the left travel control at full stroke forward for one minute.

Measure the amount of oil in bucket and record. NOTE If flow of oil will be high, perform the test for 15 seconds and multiply amount of oil by 4 to compare to chart. Repeat step 14 with right control at full stroke forward for one minute. Remove special tool and place into sprocket to stall reverse movement. Repeat steps 14 and 15 with control to reverse movement.

If readings are greater than values in chart, refer to shop manual for additional instructions. Remove hydraulic fitting cap. Install hydraulic lines back to the original fitting and torque to the proper value. Check Hydraulic Oil level. Device to mark starting point of tracks. Travel Speed Test 1. Operate Swing Right Control until mchine is sitting across perpendicular tracks. Operate the Boom, Arm and Bucket Controls until bucket is on ground. Make reference mark on track. Operate the Right Travel Control full forward and measure the time it takes for track to make three complete revolutions.

Repeat Step 7 ands 8 two more times. Averagethe readings and compare to Travel Speed Specification Chart. Place Travel Speed Select Switch in 2 speed and repeat steps 8 and 9. Line Parallel to Machine in soil. Operate the Boom, Arm and Bucket Controls until attachment is in a transport position. Average the readings and compare to Travel Deviation Specification Chart.

Verify Engine RPM Conditions to Use Adjustment A Tools and Equipment Required Machine Settings and Sight Conditions If any warning Icons are visible in gauge cluster display, preform the proper maintenance or repairs to correct the problem. Then proceed to Adjustment A. Check the operation of Emergency Stop control, confirm that cable moves freely both in and out, and does not bind.

Emergency stop cable must be pushed in to obtain proper engine performance. Confirm that the manual Throttle Control Cable is pressed in Release position. Verify engine RPM 1. If possible start engine, run excavator hydraulic system until water temperature is at normal operating range. Record engine RPM readings for later verification.

With engine running press screen change switch one time, RPM will appear on screen. If screen shows 0 RPM check the following: a. Check the resistance value of RPM sensor. Value must be 2. Connect the speed sensor, to a multi meter. With engine running at low idle, measure the voltage AC. Conditions to use Adjustment A Adjustment A procedure must be preformed when one or more of the following components have been removed, repaired, adjusted or replaced.

Mechatronics Controller CPU 2. Stepping Motor Assembly 3. Engine Fuel Pump Assembly 5. Engine 6. Verification of auto accel RPM 1. With safety lock in the lock up position, See Figure Maintance Connector in the factory default position. Turn key switch to start position and start engine. Place throttle potentiometer to high idle position. Place Safety lock lever in the unlock down position. Fully activate pilot control for bucket dig then release pilot control, wait three seconds and check engine RPM.

Place throttle potentiometer to low idle position. Press screen change switch two times to retun screen to Monitor System Ok. Machine Settings and Site Conditions 1. Attachment in the Hydraulic Oil Check Position. Maintenance Connector placed in the Release Condition. Manual Throttle Control pressed IN all the way.

Firm level site. Pull up on the top bail for seat adjustment and move seat fully forward. Pull reclining adjustment lever up and move seat back forward. Release the 4 top screws from rear panel top cover behind the operator s seat by turning 90 degrees. Press the panel locks to release panel, tilt the cover towards the operators seat to obtain access to the speaker wires, remove wires.

With speaker wires removed carefully remove CPU access panel from cab and place in safe area. Removal of Rod linkage and Lever from Stepping Motor. Move to the engine compartment and locate the injection pump and stepping motor. With a 13 and 14 mm spanner wrench remove the rod linkage from arm of stepping motor and fuel injection pump. Using a 5 mm allen wrench and 10 mm spanner wrench remove the splined lever from stepping motor.

Loosen the left and right hand thread jam nuts on rod and inspect the heads of linkage for excessive wear. Set the rod length to the specific dimension per machine model number listed below. Note Dimension B is the starting dimension of fuel injection rod assembly. Final dimension of rod will be determined when rod and lever is installed on engine and engine stop gap is set.

This will avoid possible damage to the Mechatronics controller and prevent loss of computer memory. Adjustment A Procedure 1. Remove the key from key switch. Locate the CPU behind operators seat. Remove grommet located on the top of CPU.

Carefully move the test run switch to test position. Insert key in key switch, turn key to the ON position, do not start engine. Gauge Cluster must display Monitor System Ok. If not preform maintenance or repairs to correct problem. Proceed to next Step. Turn accel dial to the low idle position. Press the buzzer stop switch for 5 to 10 seconds and release. Step 1 will not apear until buzzer stop switch is released.

Install the linkage dimension B and rod assembly between the stepping motor and injection pump. Confirm that the spline on the stepping motor is protruding approximately 3mm. Secure the lever to stepping motor with the 5mm allen wrench and 10mm wrench. The final length or the rod will be determened in the next step. With a feeler gauge inserted between the fuel shut off stop bolt and the fuel injection pump lever adjust the clearance to 0. Once clearance has been reached with only slight resistance on the feeler gauge tighten all the rod linkage jam nuts with proper 13 and 14 mm wrenches.

You will notice that the controller will move the stepping motor to a position higher than the normal RPM starting range. Start engine and wait until engine reaches normal operating temperature range. The controller will take control of the stepping motor and bring the engine from: a. Mid range. Below Low Idle. High Idle. Low Idle. NOTE Required time for engine to memorise steps is about 3 minutes. After completion of A Adjustment 1. Turn key switch to Off position, stop engine and allow the battery relay to shut off approximately 4 seconds.

Reinstall protective grommet in the controller cover. Change the maintenance connector from the Factory Default to accel release position. Start the engine, raise the engine speed to the high idle RPM. See Press the screen change switch once to bring up RPM. Verify engine speed changes on the multidisplay in accordance with the set values which is listed on the following pages by machine model and serial number. Work Mode.

By operating the accel dial from low to high, the voltage varies. The step number may vary a little after A adjustment. Measure resistance of solenoid valve. If values do not change while operating the control lever, remove connector on the failed low pressure sensor.

Then install connector on pressure sensor which is known to work. Then install connector on pressure sensor which. D SW. Boom Raise Conflux Control Summary of Mechatro Controller Trouble History Diagnosis This manual summarizes the mechatro system and the function of the mechatro controller related components. Regarding the conditions before and after each conversion, refer to the hydraulic system and the electric system.

P2 pump is controlled by B Supply an optimum flow for each 2 solenoid proportional valve. P1 pump is controlled by A The power curve shall be an ideal curve. The negative control pressure is then put into the negative control pressure sensor. The back pressure in the control valve the return pressure to tank is put into the back pressure sensor. P-Q control The voltage output of the high pressure sensor that is attached to the pump is put into the mechatro controller. Determining the delivery rate of pump 1 The lower of the pump delivery rate computed in the negative control and the pump delivery rate computed in the P-Q control is selected and put out as a current command to the solenoid proportional valve according to the delivery rate.

It changes the tilting angle of the pump and controls the delivery rate of the pump. If load to the actuator increases, the voltage from the high pressure sensor is put into the mechatro controller. This insures that the machine is operated without engine failure even if load to the pump is increased.

The controller processes the pilot signal and puts out a current command to the P2 cut solenoid proportional valve according to the voltage input. The controller processes the negative control signal and puts out a current command to the P1 and P2 pump solenoid proportional valves according to the voltage input. When the mechatro controller command shifts the P2 bypass cut valve, the oil delivered by the P1 pump is combined with that by the P2 pump when the boom hoist operation is performed.

Sequence conflux control: 1 If the P2 pump pressure rises above a certain level during the arm in operation, the mechatro controller sensing the voltage output of the high pressure sensor processes the pilot signal and puts out a current command to the travel straight solenoid proportional valve and the P1 bypass cut solenoid proportional valve.

Since the P1 bypass cut valve is shifted, the oil discharged by the P1 pump is combined with that delivered by the P2 pump.

Variable recirculation control for light load arm in: Recirculation control 1 If the arm in operation is performed, the secondary pilot pressure for the arm operation shifts the arm spool and is put into the low pressure sensor.

Then a command from the mechatro controller changes over the variable recirculation solenoid proportional valves for the P2 pump and the arm. This allows the oil returned from the arm cylinder rod to be recirculated to the oil delivered by the pump. Recirculation cut control 1 If the P2 pump pressure rises above a certain level during arm in operation, the mechatro controller sensing the voltage output of the high pressure sensor processes the pilot signal and puts out a reduced current command to the arm variable recirculation solenoid proportional valve.

Arm in anti- cavitation control 1 If the arm in is operated, the secondary pilot pressure for arm operation switches the arm spool and arm in is put into the low pressure sensor.

Arm out conflux 1 Start arm out operation simultaneously, and arm operation pilot pressure switches arm spool, arm conflux spool and is input into low pressure sensor. The controller processes the pilot signal and puts out a current command to the proportional valve for the P1 bypass cut valve according to the voltage input.

Command to travel straight solenoid proportional valve: The secondary pressure of the solenoid proportional valve is put out according to the higher of the pilot pressure during ATT operation and the travel pilot pressure. P1 cut solenoid proportional valve command: The higher of the pilot pressure during the P2 section ATT operation arm and swing and the left travel pilot pressure is put out as the select pressure.

P2 cut solenoid proportional valve command: The higher of the pilot pressure during the P1 section ATT operation boom and bucket and the right travel pilot pressure is put out as the select pressure.

Swing priority 1 If swing operation is performed during arm in or arm in is performed during swing , the secondary pilot pressure for arm operation switches the arm spool. The pressure is also put into the low pressure sensor. The secondary pilot pressure for swing operation switches the swing spool and is put into the low pressure sensor. The controller processes the pilot signal and puts out a current command to the variable proportional valve according to the voltage input.

Since the arm and the swing system circuits are connected in parallel to each other, the delivery rate of the P2 pump is used preferentially to operate the swing system, while the arm system is operated by recirculated oil.

After judging the arm in and swing operations are concurrently carried out, the mechatro controller outputs command current corresponding to the input voltage of swing low pressure sensor to swing priority solenoid proportional valve PSV-H and P1 bypass cut solenoid proportional valve.

Consequently the swing operating speed with the arm in operating speed is relatively raised, that is, become in swing priority condition. However, the mechatro display and the cumulative engine oil lubrication time may be changed over if the screen change switch is pressed.

Work mode select switch functions Work mode select M A B Display item roll forwarded in trouble history indication Cumulative hours from engine oil change display up Flow rate display up in the B breaker mode Buzzer stop switch functions Stops the warning sounding Service diagnosis display item down Display item rollbacked in trouble history indication Cumulative hours from engine oil change display down Flow rate display down in the B breaker mode.

The below controls are performed as the result of judgment. The mode is suited for heavy load work in which operating lever actions are recognized sensitively and the machine is operated at high speed with its priority laid on the rate of operation. Where the breaker and other require a limit to the max.. Then the adjust mode is available. After that, the previous value is indicated. LCD display. The functions displayed on the multidisplay are classified roughly into the following 8 types.

CPU error display Display the error of the mechatro controller, etc. Self-diagnosis display Service diagnosis display Displays the information output by the mechatro controller such as the pressure sensor detection, proportional valve, solenoid valve, etc. Trouble history display Stores and displays the contents of the troubles detected through the mechatro self diagnosis.

Mechatro A adjustment display Displays it by procedure during the mechatro A adjustment. Warning displays Auto warming function Warning displays item. The buzzer sounds on display 2, 3, 5, 6, 7 and Supplementary explanation In the case of 5 and 6, the buzzer is not stopped even if the buzzer stop switch is pushed. In the case of 7, the buzzer is stopped if the buzzer stop switch is pressed. In the case of 2, 3, and 28, the buzzer stops five seconds later automatically.

Errors coming out of the self diagnosis are displayed on the multi display of the gauge cluster. Regarding the connector numbers and the pin numbers, refer to the C-1 Mechatro Controller which appears later. Wire numbers and colors may be confirmed on the electric circuit diagram or on the harnesses diagram.

Swing parking solenoid valve fail Governor motor current 30 fail Governor motor starting 31 point indexing fail. Each time the screen change switch on the gauge cluster Multidisplay is pressed, the number runs like No.

Each time the buzzer stop switch on the switch panel is pressed, the number returns like No. Screen change SW. Note : The scrolling of service diagnosis to see the variation by the work mode with the work mode selector switch may cause the change of the mode, so use the screen change switch on the gauge cluster for scrolling.

Service diagnosis indication No. Note : The examples of displays are in the M mode with the engine at Hi and with the operating lever to full stroke. Note : The system stores all error items at each hour meter reading. To check error items at different hour meter readings, push the work mode change switch or the buzzer stop switch. Press once more, and the engine oil supply cumulative time screen is displayed. Press the screen change switch and release. The mi- maximum working pressure.

Controls shall be pro- 4. The tube sheets of the cooler and condenser shall vided with a battery backup to prevent the be bolted together to allow for field disassembly loss of configuration information in case of and reassembly.

Waterboxes shall have vents, drains, and covers ware. Additional hardware shall be necessary to permit tube cleaning within the space shown if the building control system is not part of a on the drawings. Cooler shall be designed to prevent liquid refrig- information: erant from entering the compressor.

Refrigerant Flow Control: for 15 minutes. The 4 function keys shall be software driven within the Status, Schedule, Liquid refrigerant from the condenser shall be me- Set Point and Service menu structures as de- tered using a direct acting, float-type metering valve scribed in section k.

Capacity control shall be by means of a hy- ating conditions. By maintaining a liquid seal at the draulically operated slide valve under the com- flow valve, bypassed hot gas from the condenser to pressor rotors. The float valve chamber shall have a bolted normal ARI conditions without the use of hot access cover to allow field inspection, and the float gas bypass. The slide valve shall be precisely valve shall be field serviceable.

Fixed orifices shall not positioned by a PID proportional-integral- be acceptable. Controls, Safeties, and Diagnostics: water temperature without hunting or over- 1. Controls: shooting the set point. The chiller shall be provided with a factory c.

The microprocessor control system shall au- installed and wired microprocessor control tomatically control the chilled water pump and system with individually replaceable modular condenser water pump.

Upon request to start the compressor, the con- line voltage, if the auto-restart after power trol system shall start the chilled water pump, failure algorithm is enabled, the chiller shall condenser water pumps, and tower fans, if automatically resume the mode of operation appropriate, and verify that flows have been prior to shutdown. The controller shall then com- j. The con- trols shall allow configuration of the ramp k. The control cen- period, a message shall be displayed inform- ter shall allow configuration of demand limit ing the operator that the chiller is operating based on either a user input or an external in ramp loading mode.

When demand limit is ac- tive, a message shall be displayed indicating f. The chiller controls shall be supplied as stan- the source of the demand signal. If one of shall be accessible to view the status of every the two chillers on line goes into fault mode, point monitored by the control center the third or standby chiller shall be controlled including: as a lag chiller. The chiller controls shall be configurable for manual or automatic start-up and shutdown.

The control system shall automatically shut In automatic operation mode, the controls down the compressor to minimize energy us- shall be capable of automatically starting and age whenever the leaving chilled water tem- stopping the chiller according to a stored user perature is 5 F 3 C below the desired chilled programmable occupancy schedule.

The con- water set point or the chilled water tempera- trols shall include built-in provisions for ac- ture is below its set point and the chilled wa- cepting a minimum of three, day occu- ter temperature difference is less than a speci- pancy schedules, the local time schedule shall fied value.

The chilled water pump will re- be Schedule 01, the ice build time schedule main on, and when the leaving chilled water shall be Schedule 02, and the CCN default temperature rises above the set point by a schedule shall be Each schedule shall al- user-configured amount, the compressor shall low a minimum of 8 separate occupied, un- automatically restart. During the shutdown pe- occupied periods.

All of the 8 occupied pe- riod, a message shall be displayed informing riods can be scheduled by individual day for the operator a recycle restart is pending. A separate schedule shall i. The control center shall monitor line voltage, be provided for holidays. Display of the occupancy sched- 14 High oil filter differential pressure ules shall be viewable on the LCD screen.

The controls 18 Motor current signal loss shall also provide for chiller start-up and shut- 19 Motor power supply phase reversal down through a remote contact closure from 20 Temperature sensor and transducer faults a customer supplied device or from a build- 21 Single cycle dropout ing management system software command.

The control system shall detect conditions that down periods. The controls shall allow for the approach protective limits and shall take self- specification of capability control through ei- corrective action prior to an alarm occurring. These messages shall be alarm alert message shall be displayed in- displayed in text form, not in codes.

If dur- and controls options, capacity and safety ing either condition the protective limit is override limits and parameters. Safeties: is received to determine if pressures, tem- a. Unit shall automatically shut down when any peratures, and timers are within pre-start lim- of the following conditions occurs Each of its, thereby allowing start-up to proceed.

If these protective limits shall require manual any of the limits are exceeded, a text alert reset and cause an alarm message to be dis- message will be displayed informing the op- played on the LCD screen informing the op- erator of the cause of the pre-start alert. A pump test shall automatically 8 High compressor discharge temperature energize the chilled water and condenser wa- 9 Low oil pressure ter pumps. The control system shall confirm 10 Low oil level that water flows have been established and 11 Loss of cooler water flow require operator confirmation prior to pro- 12 Loss of condenser water flow ceeding to the next test.

A slide valve test shall energize the increase Management Module during unauthorized opera- and decrease slide valve solenoids to check tion such as loss of communication between the for proper operation. Building Control System Interface: H.

Electrical Requirements: The chiller control system shall have the ability to 1. Electrical contractor shall supply and install main interface and communicate directly to the build- electrical power line, disconnect switches, circuit ing control system without the use of additional breakers, electrical protection devices per local code field installed hardware and software.

If different requirements and as indicated necessary by the building control and chiller suppliers are chosen, chiller manufacturer. Electrical contractor shall wire the chilled water G. Low Voltage Unit Mounted Starter: pump, condenser water pump, and tower fan con- An optional reduced voltage wye-delta or solid-state trol circuit to the chiller control circuit.

The compressor motor-starter 4. Electrical contractor shall supply and install elec- shall be factory mounted, wired, and tested prior to trical wiring and devices required to interface the shipment by the chiller manufacturer. Customer elec- chiller controls with the building control system, if trical connection for compressor motor power shall applicable.

Electrical power shall be supplied to the unit at the Solid-state starter shall provide stepless compressor voltage, phase, and frequency listed in the equip- motor accelerating and limit motor inrush current to ment schedule. The starter shall include 6 silicon control rectifiers SCR with I. Mechanical contractor shall supply and install pres- bypass once the motor has achieved full voltage and sure gages in readily accessible locations in piping speed.

The starter shall also include automatic accel- adjacent to the chiller such that they can be easily eration kick circuitry which monitors motor current read from a standing position on the floor. Scale range shall be such that nate the instability that occurs at the breakaway torque design values shall be indicated at approximately point.

Flow switches shall be installed denser water pump, tower fan, customer remote in horizontal runs at least 5 pipe diameters down- alarm, shunt trip, and main power disconnect. The stream from any bend or tee. Insulation: 3. Spare Sensor Package 1. Chilled water piping and cooler waterboxes shall 4. Control Options Module Upgrade Kit be insulated by the mechanical contractor. Stand-Alone Pumpout Unit 2. Factory installed insulation shall be available for 6.

Separate Storage Tank and Pumpout Unit the chiller. Additional insulation shall be installed 7. Flow Switch, Differential Pressure Type at the jobsite by the mechanical contractor. Sound Insulation Kit 3. Refrigerant Isolation Package in. Vibration Isolation: Solid State Chiller manufacturer shall furnish neoprene isolator Start-Up: N. Factory Installed Options: 1.

The chiller manufacturer shall provide a factory- 1. Thermal Insulation trained representative, employed by the chiller manufacturer, to perform the start-up procedures 2. Automatic Hot Gas Bypass as outlined in the start-up, operation, and 3.

Control Options Module maintenance manual provided by the chiller 4. Cooler and Condenser Passes 2. After the above services have been performed, the 6. Marine Waterboxes, psig kPa select sonnel in the proper operation and maintenance sizes of the chiller. Refrigerant Isolation Package 3. Manufacturer shall supply the following literature: 9. Factory Performance Test a. Start-Up, Operation, and Maintenance Solid State b. Installation Instructions. Export Crating c.

Field Wiring Diagrams. Factory Charged Unit d. One complete set of certified drawings. Optional Field Installed Accessories: The following standard accessories are available for field installation: 1. Soleplate Package 2. Spring Isolators. Book 2 Page 48 Catalog No. Pular no carrossel. Anterior no carrossel. Explorar E-books. Os mais vendidos Escolhas dos editores Todos os e-books. Explorar Audiolivros. Os mais vendidos Escolhas dos editores Todos os audiolivros. Explorar Revistas.

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