Dunham-Bush MM0305F Installation, Operation & Maintanance Manual Download Page 21 | Manualshive

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4.0 OPERATION

ACCS 800, 890, 960

MODEL SUCTION

SIZE

(QTY)

LIQUID SIZE

(QTY)

ACCS 800

1 3/8[35] (5)

5/8[16] (5)

ACCS 890

1 3/8[35] (2),

1 5/8[41] (3)

5/8[16] (5)

ACCS 960

1 5/8[41] (3)

7/8[22] (3)

ACCS 1020, 1140, 1340, 1520

MODEL A

SUCTION

SIZE

(QTY)

LIQUID SIZE

(QTY)

ACCS 1020

143[3632]

1 5/8[41] (2)
2 1/8[54] (1)

7/8[22] (3)

ACCS 1140

143[3632]

2 1/8[54] (3)

7/8]22] (3)

ACCS 1340

150[3810]

1 5/8[41] (3)
2 1/8[54] (1)

7/8[22] (4)

ACCS 1520

150[3810]

2 1/8[54] (4)

7/8[22] (4)

NOTE: ALL DIMENSIONS ARE IN INCHES.

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Summary of Contents for MM0305F

Page 1: ...VEB D Air Cooled Split System Air Conditioner with Scroll Compressors R22 R407C INSTALLATION OPERATION MAINTENANCE MANUAL INSTALLATION OPERATION MAINTENANCE MANUAL Products That Perform By People Who Care R Form No MM0305F MM0307A ...

Page 2: ...ING 11 3 7 REFRIGERANT PIPING 13 3 8 LEAK TEST SYSTEM PRESSURE TEST 14 3 9 VACUUM TEST AND DEHYDRATION 14 3 10 INSTALLATION OF DRIERS OR SIGHT GLASS 15 3 11 CHARGING 15 3 12 LUBRICATION 15 3 13 SENSING BULB LOCATION 15 3 14 EXTERNAL EQUALIZER CONNECTION 16 3 15 HOT GAS BYPASS 16 3 16 TIGHTENING OF PULLEY SET SCREW 17 3 17 PULLEY ALIGNMENT 17 3 18 BELT TENSION INSPECTION GUIDE 17 4 0 OPERATION 4 1 ...

Page 3: ...sor motor protectors for each compressor s Every Dunham Bush air cooled split air conditioner and heat pumps have been subject to stringent quality control and accurately testing as a final verification of reliability If it is correctly installed operated and maintained it will provide many years of satisfactory and efficient performance Note These instructions are general in nature and are for st...

Page 4: ...remotely mounted for cooling only and heat pump 6 Discharge plenum and return air grille 2 2 RIGGING AND UNCRATING Each unit has been tested inspected and properly packed or crated prior to delivery It is very important that precaution is taken in handing the units by the installers movers and riggers When lifting with slings use spreader bars across the top of the unit to prevent any damage to th...

Page 5: ... as per local legislation 4 Location where air is allowed to circulate If installing two units together make sure that the discharge air from one unit were not circuited by the other unit Figure 3 1 5 Location where there is no direct heat source such as near a generator This is because if the entering air temperature is high then the unit will operate at high condensing temperature and subsequent...

Page 6: ...3 0 INSTALLATION 3 2 AIR COOLED CONDENSING UNITS CLEARANCE SUGGESTED ACCS 68 81 95 ACCS 108 125 145 ACCS 160 190 220 250 290 ACCS 320 380 435 6 ...

Page 7: ...3 0 INSTALLATION ACCS 480 510 570 ACCS 640 700 760 ACCS 800 890 960 ACCS 1020 1140 1340 1520 7 ...

Page 8: ...D DUCTING SYSTEM Leave the unit in its packaging until it reaches the final destination This unit is designed for indoor installation only In installing the unit these suggestions should be given consideration so that the unit will operate with optimum capacity and also to ease the installation and future services 8 ...

Page 9: ...mize the ducting length 4 Location where there is no direct heat and air is allowed to circulate 5 It is suggestable to place the unit higher than the floor level for ease of drain piping The base should be 4 100mm higher and leveled Fix the unit to the base with anchor bolts It is also suggestable to place vibrating isolation component between the unit and the base 6 Check the levelness of the ce...

Page 10: ...3 0 INSTALLATION b EB 250D 290D 320D 380D 435D 480D 510D 570D 640D 700D 760D c EB 800D 890D 960D 1020D 1140D 1340D 1520D 3 4 2 HORIZONTAL CASING TYPE HEB HEB 68D 81D 95D 108D 125D 145D 160D 190D 220D 10 ...

Page 11: ...o be installed then it shall be 1 5 of equivalent duct diameter Equivalent duct Ø 4ab π 0 5 Please refer to AMCA standard for proper ducting installation guidelines FIGURE 3 5 SUGGESTED METHOD FOR CONNECTING SUPPLY DUCT Model A R HEB EB 68D 125D 40 1016mm 25 635mm HEB EB 160D 760D 60 1524mm 35 889mm EB 800D 1520D 80 2032mm 50 1270mm Note Transition element shall not be greater than 15 for convergi...

Page 12: ...STALLATION 2 EVAPORATING IS ABOVE THE COMPRESSOR Note Traps should be provided for every 20ft 6 1m of vertical riser for proper oil movement 3a TYPICAL PIPING SCHEMATIC WITH OPTIONAL ACCESSORY AS INDICATED 12 ...

Page 13: ...ing to the manufacturers standard 4 Minimize the exposure time to atmosphere during brazing 5 Drain pipe size should be the same or bigger than the existing pipe The pipe should be installed in downward slope so that water is drained by gravity A trap must be provided on the pipe so that condensate will drain and not overflowing the drain pan In addition upon start up the water will not be sucked ...

Page 14: ...through 7 9 When system tight after leak test keep pressurized at 200psig 1380kPa and hold for 12 hours Full in pressure should be negligible some may be due to temperature change only 10 When system is tight proceed with vacuum test and dehydration 3 9 VACUUM TEST AND DEHYDRATION The purpose of evacuation is to evacuate the system when it is known or suspected that the system has been exposed to ...

Page 15: ... all the systems have been done up to step 4 proceed with 5 and 6 6 Shut off the system compressor fans pumps and leave for 24 hours 3 12 LUBRICATION The scroll compressor use mineral oil 3GS for R22 compressors and POE Polyol ester oil for HFC refrigerants R134a R407c etc compressors Please refer to compressor name plate for original oil charge Recharge shall be 118ml less than the original charg...

Page 16: ...ting hot gas into the inlet of the distributor This would prevent the suction pressure from falling below the desired settings and thus causing frequent compressor cycling The valve is pressure actuated where it allows the discharge gas to bypass if the downstream pressure is below the setting The setting could be changed by adjusting the stem on the valve body To set the pressure loose the seal n...

Page 17: ...he measure belt 3 Set the O ring on the deflection force scale to zero FIGURE 3 18 BELT SPAN 4 Place the tension meter squarely on the belt at the belt span Apply a force on the plunger and perpendicular to the belt span until the bottom of the O ring even the top of the next belt or with the bottom of a straight edge laid across the sheaves 5 Remove the tension meter and read the force applied fr...

Page 18: ...te the defrost cycle once there is demand for it The sensor from the controller would sense the suction pressure and if the pressure is lower then the preset value Then a signal would be sent to the control panel which then relay the signal to the reversing valve to reverse the cycle Now the outdoor coil would be discharging hot air and defrosting the ice on the fins surface The standard factory s...

Page 19: ... 7 8 22 1 1 2 13 1 NOTE ACCS 68 IS WITH SERVICE VALVE ACCS 108 125 145 MODEL SUCTION SIZE QTY LIQUID SIZE QTY ACCS 108 1 3 8 35 1 1 2 13 1 ACCS 125 1 3 8 35 1 1 2 13 1 ACCS 145 1 3 8 35 1 5 8 16 1 ACCS 160 190 220 250 290 MODEL A SUCTION SIZE QTY LIQUID SIZE QTY ACCS 160 40 1 4 1016 1 3 8 35 1 5 8 16 1 ACCS 190 40 1 4 1016 1 5 8 41 1 5 8 16 1 ACCS 220 48 1 4 1219 1 3 8 35 1 1 1 8 29 1 1 2 13 2 ACC...

Page 20: ...1 3 8 35 3 5 8 16 3 ACCS 480 510 570 MODEL SUCTION SIZE QTY LIQUID SIZE QTY ACCS 480 1 3 8 35 3 5 8 16 3 ACCS 510 1 5 8 41 1 1 3 8 35 2 5 8 16 3 ACCS 570 1 5 8 41 3 5 8 16 3 ACCS 640 700 760 MODEL SUCTION SIZE QTY LIQUID SIZE QTY ACCS 640 1 3 8 35 4 5 8 16 4 ACCS 700 1 3 8 35 2 1 5 8 41 2 5 8 16 4 ACCS 760 1 5 8 41 4 5 8 16 4 NOTE ALL DIMENSIONS ARE IN INCHES 20 ...

Page 21: ...8 41 3 5 8 16 5 ACCS 960 1 5 8 41 3 7 8 22 3 ACCS 1020 1140 1340 1520 MODEL A SUCTION SIZE QTY LIQUID SIZE QTY ACCS 1020 143 3632 1 5 8 41 2 2 1 8 54 1 7 8 22 3 ACCS 1140 143 3632 2 1 8 54 3 7 8 22 3 ACCS 1340 150 3810 1 5 8 41 3 2 1 8 54 1 7 8 22 4 ACCS 1520 150 3810 2 1 8 54 4 7 8 22 4 NOTE ALL DIMENSIONS ARE IN INCHES 21 ...

Page 22: ...86 50 1270 33 838 15 1 2 394 13 1 2 343 21 1 4 540 HEB 145D 27 686 50 1270 33 838 15 1 2 394 13 1 2 343 21 1 4 540 HEB 160D 29 737 58 1448 40 1016 18 1 2 470 16 406 24 3 8 619 HEB 190D 29 737 58 1448 40 1016 18 1 2 470 16 406 24 3 8 619 HEB 220D 29 737 78 1981 40 1016 18 1 2 470 16 406 30 762 EB 250D 290D 320D 380D 435D MODEL A B C D E F EB 250D 29 78 40 18 1 2 16 30 EB 290D 38 84 45 17 19 33 1 2 ...

Page 23: ...489 80 2032 35 1 2 902 35 1 2 902 39 991 14 356 EB 1340D 70 1778 118 2997 86 2184 40 1016 40 1016 39 991 14 356 EB 1520D 70 1778 118 2997 86 2184 40 1016 40 1016 39 991 14 356 VEB 108D 125D 145D 160D 190D Model A B C D E F G H 220D 250D VEB 108D 51 1 2 1308 52 1321 25 635 15 1 2 394 13 1 2 343 17 1 4 438 25 3 4 654 25 3 4 654 VEB 125D 51 1 2 1308 52 1321 25 635 15 1 2 394 13 1 2 343 17 1 4 438 25 ...

Page 24: ...4 0 OPERATION 4 10 TYPICAL OPERATING SEQUENCE 24 ...

Page 25: ...or if the belt is loose Once every six months Pulley 1 Make sure the set screws are properly tightened and there is no crack on the pulley Once every six months Blower 1 Turn the blower manually It should run smoothly and there is no excessive bearing noise Once every six months Bearing and Shaft 1 Check for evidence of wear Once a year Bolts Screws and Nuts 1 Tighten any loose components Once a y...

Page 26: ...5 0 MAINTENANCE 5 2 TROUBLE SHOOTING CHART 26 ...

Page 27: ...5 0 MAINTENANCE 27 ...

Page 28: ...5 0 MAINTENANCE 28 ...

Page 29: ...WB SUPPLY AIR TEMPERATURE DB WB AIR VOLUME AMBIENT AIR TEMPERATURE OFF CONDENSER AIR TEMPERATURE 1 2 3 COMPRESSOR AMPS 4 CONDENSER FAN AMPS EVAPORATOR FAN AMPS VOLTS This log sheet is provided as a recommendation of the readings that should be taken on a periodic basis The actual readings taken and the frequency will depend upon the units application hours of use etc This type of information can p...

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