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Nitchi EC4 Series, Operating And Maintenance

The Nitchi EC4 Series user manual, available for free download at manualshive.com, provides comprehensive instructions for operating and maintaining this exceptional product. Get the most out of your Nitchi EC4 Series by accessing this detailed manual, ensuring seamless usage and prolonging the lifespan of your equipment.

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5

3. CONDITIONS OF USE

The EC4 Series electric chain hoists and trolleys are designed for the vertically lifting, lowering and hori-
zontal transportation of loads by operating the pendant push button switch, and must be used within 
the following conditions:

1. 

Power source : As specified on name plate of the electric chain hoist, and motorized trolley.

2. 

Trolley beam : Trolley to be used only on the designated beams.

3. 

Temperature : -/- 20°C ÷ 40°C

4. 

Humidity : Under 90%

5. 

Protection : IP54 (Do not use in rain or dusty environments.)

6. 

Enclosure status: Do not use in ambient conditions that contain steam or explosive gases.

7.  

Duty rating: Model EC4 

 

30 minutes

 

 

 

Model ECT4   

10/30 minutes (slow / fast) 

 

 

 

Model ECC4    

15 minutes 

 

 

 

Model EET6    

30 minutes 

8.  

FEM group :  Models EC4, EET6 

1 Am

 

 

 

Models ECT4, ECC4   1 Bm

STANDARD SPECIFICATIONS................................................................................................................................................................ 1
INSTALLATION............................................................................................................................................................................................... 6
 

Connecting the Chain bucket................................................................................................................................. 6

 

Lubrication........................................................................................................................................................................... 7

 

Circuit  breakers.................................................................................................................................................................. 7

 

Power source cabIe........................................................................................................................................................ 8

 

Adjusting the Trolley width....................................................................................................................................... 8

 

Number of Spacer washers....................................................................................................................................... 9

 

Connecting the Hoist to the Motorized trolley............................................................................................. 11

 

Connecting the Hoist to the Trolley......................................................................................................................12

 

Setting the Trolley onto the beam........................................................................................................................ 13

 

Connecting the Power source cabIe................................................................................................................... 14

 

Connecting the Quick coupling............................................................................................................................. 15

 

lnspection After lnstallation...................................................................................................................................... 16

INSPECTION &  MAINTENANCE.......................................................................................................................................................... 17
INSPECTION BEFORE  USE...................................................................................................................................................................... 17
MONTHLY  AND ANNUAL INSPECTIONS...................................................................................................................................... 17
INSPECTION  POINTS.................................................................................................................................................................................. 18
 

Hook & Chain lnspection............................................................................................................................................ 20

 

Care After lnstallation.................................................................................................................................................... 21

ADJUSTING  THE  BRAKE............................................................................................................................................................................ 22
Adjusting the electromagnetic brake............................................................................................................................................ 22
CIRCUIT DIAGRAM...................................................................................................................................................................................... 23
 

Caution.................................................................................................................................................................................. 23

POWER  SOURCE CABLE  SPECIFICATIONS.................................................................................................................................. 26
SPARE PARTS TABLE AND SPARE PARTS CODE TABLE............................................................................................................ 26

CONTENTS

Summary of Contents for EC4 Series

Page 1: ...essary when inspecting and maintaining the trolley and or electric chain hoist N B The above information will be required when purchasing spare parts and when making inquiries Copy them from the name plate on the hoist and save them for future reference The hoist operator must receive this operating instructions booklet The hoist operator must read this operating instructions booklet Model capacit...

Page 2: ...rning provisions In this instructions booklet two categories DANGER and CAUTION EXPLANATION OF THE WARNINGS DANGER DANGER are incorrect usages that can lead to death or serious injuries CAUTION CAUTION are incorrect usages that can lead to light injuries or property damage Situations classified as CAUTION may result in serious conditions in some cases Precautions must be obeyed no matter what cate...

Page 3: ...e ALWAYS Check the safety latches to see if they work properly Broken and missing safety latches must be replaced immediately ALWAYS Use genuine NITCHI parts and chains NEVER Modify the hoist NEVER Use modified or deformed hooks NEVER Use a hoist when malfunction unusual performance damage or extensive wear are found NEVER Abuse the over hoisting over lowering limit switch mechanism by using it re...

Page 4: ...nked damaged or worn chain and never attempt to lengthen the load chain NEVER Use the load chain as a sling and never apply the load to the tip of the hook NEVER Use the load chain so that it comes in to contact with an edge NEVER Allow the chain or hook to be used as a ground for welding and never touch them with live welding electrodes NEVER Abuse the friction clutch by using it frequently lmpro...

Page 5: ... slow fast Model ECC4 15 minutes Model EET6 30 minutes 8 FEM group Models EC4 EET6 1 Am Models ECT4 ECC4 1 Bm STANDARD SPECIFICATIONS 1 INSTALLATION 6 Connecting the Chain bucket 6 Lubrication 7 Circuit breakers 7 Power source cabIe 8 Adjusting the Trolley width 8 Number of Spacer washers 9 Connecting the Hoist to the Motorized trolley 11 Connecting the Hoist to the Trolley 12 Setting the Trolley ...

Page 6: ... 8 6 10 1 0 9 1 1 2 6 250 660 40 6 0 5 6 43 ECJ40100 1tw 3 0 4 3 5 0 2 2 6 45 6 0 5 6 57 EC40100 1t 3 0 5 6 6 6 1 1 1 3 0 7 1 1 2 6 570 755 57 6 0 5 6 55 ECJ40200 2t 3 0 2 8 3 3 2 2 6 60 6 0 5 6 67 Item No Rated load Hook block weight kg Major Dimensions mm A B D E F1 P Q EC40025 250kg 0 7 245 245 137 149 20 660 795 EC40050 500kg ECJ40100 1tw 2 4 167 119 25 715 225 835 EC40100 1t 0 9 255 255 150 1...

Page 7: ... Hook Block weight kg Major Dimensions mm A B D E F1 H I K L M P Q U ECE40025 250kg 0 7 245 245 123 149 20 b 2 280 b 2 240 280 32 t2 b 41 670 195 99 t2 ECE40050 500kg ECJE40400 1tw 2 4 153 119 25 715 225 835 ECE40100 1t 0 9 255 255 136 168 705 200 ECJE40200 2t 5 0 177 127 30 b 2 325 b 2 250 350 33 t2 b 60 790 240 121 t2 910 1 Values marked will differ in accordance with the height of lift 2 The sp...

Page 8: ...28 t2 b 53 775 240 102 t2 ECJP40200 6 0 5 6 895 Item No Rated load Hook block weight kg Geared trolley Plain trolley Hand chain Amount of gear trolley movement when hand chain is pulled 1 meter mm H mm T Net weight kg H mm Net weight kg ECG40025 250kg 0 7 3 0 229 b 2 190 72 t2 51 256 46 ECP40025 6 0 56 50 ECG40050 500kg 3 0 53 49 ECP40050 6 0 59 52 ECJG40100 1tw 2 4 3 0 59 55 ECJP40100 6 0 67 60 E...

Page 9: ... 6 520 43 6 0 5 6 46 ECTJ40100 1tw 3 0 4 3 5 1 1 1 1 3 2 2 6 660 49 6 0 5 6 54 ECT40100 1t 3 0 5 6 6 7 1 4 1 7 1 1 1 3 0 27 0 33 ø 7 1 1 2 6 570 56 6 0 5 6 60 ECTJ40200 2t 3 0 2 8 3 3 0 7 0 8 2 2 6 755 66 6 0 5 6 73 Item No Rated load Hook Block weight kg Major dimensions A B D E F1 P Q ECT40025 250kg 0 7 245 245 137 149 20 660 195 ECT40050 500kg ECTJ40100 1tw 2 4 167 119 25 715 225 835 ECT40100 1...

Page 10: ...ource m Pen dant S m ECC40030 300kg 3 0 5 4 6 4 0 4 15 0 6 3 1 5 0 2 6 485 37 ECC40050 500kg 3 2 3 8 520 37 ECCJ40100 1tw 1 6 1 9 2 660 43 Item No Rated load Hook Block Weight kg Major Dimensions mm A B D E F1 P Q ECC40030 300kg 0 7 245 245 137 149 20 660 195 ECC40050 500kg ECCJ40100 1tw 2 4 167 119 25 715 225 1 Values marked will differ in accordance with the height of lift 2 The specifications i...

Page 11: ...correctly when the load chain is placed into the chain bucket as sembly in one bundle 4 The inside of the chain bucket assembly must be cleaned periodically when the hoist is used in an area where dust and foreign matter can enter the chain bucket assembly Open the split pin as shown in the drawing Code Dimension A mm D1 260 D2 380 D3 480 CHAIN BUCKET APPLICATION TABLE Table 1 Table 2 0 3 6 9 12 R...

Page 12: ...r wheel and Pinion with cup grease 1 Always install a circuit breaker The circuit breaker must be exclusively for the hoist and independent from other machinery 2 Select an adequate capacity circuit breaker from Table 3 Type of hoist Rated load Lifting motor kW 50Hz 60Hz Traversing motor kW Circuit breaker Capacity A Hoist with motorized trolley 250kg 0 4 0 5 0 1 0 4 0 13 0 5 0 2 3 5 500kg 1tw 0 9...

Page 13: ...lease refer to Table 12 for the specifications of long cabtyre cables Adjust the width between the trolley wheels as follows 1 Remove the Hexagonal nuts and remove the side plate 2 Adjust the width by increasing or decreasing the number of inner spacer washers Refer to Tables 4 and 5 for the appropriate combination of inner and outer spacer washers 3 Tighten the Hexagonal nuts for the Stay bolts 4...

Page 14: ... 7 4 4 7 8 0 0 8 20 90 6 5 6 5 7 1 1 7 18 91 6 5 6 5 7 1 1 7 22 98 5 6 7 4 6 2 2 6 20 100 4 7 7 4 6 2 2 6 24 106 3 8 8 3 6 2 3 5 22 110 3 8 9 2 5 3 3 5 26 113 2 9 9 2 5 3 4 4 28 119 1 10 10 1 4 4 4 4 24 120 1 10 10 1 4 4 4 4 30 125 0 11 11 0 3 5 5 3 32 131 3 5 6 2 27 135 2 6 6 2 34 137 2 6 6 2 36 143 1 7 7 1 38 149 1 7 8 0 30 150 1 7 8 0 40 155 0 8 8 0 Table 4 Quantity and location ...

Page 15: ...9 0 7 8 19 8 4 4 8 0 4 4 16 20 100 10 7 8 9 0 7 8 19 8 4 4 8 0 4 4 16 24 106 9 8 9 8 0 8 9 17 8 4 5 7 0 4 5 15 22 110 8 9 10 7 0 9 10 15 7 5 5 7 0 5 5 14 26 113 8 9 10 7 0 9 10 15 7 5 6 6 0 5 6 13 28 119 6 11 11 6 0 11 11 12 6 6 6 6 0 6 6 12 24 120 6 11 11 6 0 11 11 12 6 6 6 6 0 6 6 12 30 125 5 12 12 5 0 12 12 10 5 7 7 7 0 7 7 10 32 131 4 13 13 4 0 13 13 8 5 7 8 8 0 7 8 9 27 135 4 13 14 3 0 13 14 ...

Page 16: ... Washer onto it Lightly tighten the Nut by hand and insert the Split pin Connecting the cables Connecting the pendant cable Connecting 1tw and 2t Plug housing Receptacle housing Connector cover gasket Fastening screw Connector cover Wire hanger Connecting section of pen dant cable wire Tightening cap Top holder pin Washer Split pin Nut Insert the split pin into the top hook pin Open the split pin ...

Page 17: ...re both facing the correct direction lnsert the Top hook pin as shown in the drawing and be sure to use the correct hole 3 4 lnsert the Split pin into the hole of the Top hook pin Open the Split pin as shown in the drawing The connecting method of a Plain trolley is basically the same as the above Geared trolley Plain trolley Electric chain hoist Insert into the hole Top hook pin Split pin ...

Page 18: ...e tread section of the trolley beam While holding the Geared wheels in position insert the Plain side plate so that the Plain wheels will be in position on the tread section of the trolley beam Firmly tighten the Hexagonal nuts of the Plain side plate side of the Stay bolts When the trolley beam is curved install the trolley so that the geared wheels are on the outside of the curve Motorized troll...

Page 19: ...areful not to twist the power source cable lnstall cable carriers at every 1 5 meters length of the power source cable The connections of the Power source cable must only be made at the Hoist Termi nal box and Power source switch Do not use Power source cables that are lengthe ned with connections The following power source feeding method can be used in place of the Messen ger wire method Please c...

Page 20: ...le pressing the section down CONNECTING THE QUICK COUPLING Disconnecting and Connecting the Quick coupling Connecting The connecting procedures are the opposite of the disconnecting procedures lnsert the Plug Plug housing positively While holding the cable and preventing it from rotating screw in the Tightening cap Screw in the Tightening cap by hand and do not use any tools Over tightening will d...

Page 21: ...r source switch is turned ON 1 The hoist is equipped with a negative phase protector When the hoist does not function when the pendant push buttons are depressed the negative phase protector is functioning lf this happens interchange the position of two wires of power source cable 2 As shown in the lower drawing a reverse connection can be corrected by interchanging two wires S and T of the three ...

Page 22: ... to give the contact points between the links extra coatings of machine oil The load chain must not be deformed and elongated and it must be free of twists and kinks Check especially carefully when the hoist lifts on two or more falls of load chain The hooks must not be elongated and deformation must be within the limits indicated in Table 9 The safety latches must all be in good condition and mov...

Page 23: ...when handle is pushed up Test lifting and lowering without a load Stop holder Bolts and nuts firmly tightened No crack Brake mechanism Brake The brake must function positively When the rated load is lifted the amount of slip page of the brake must be within 1 of the distance the hoist can lift in 1 minute Refer to the Lifting speed on Page 6 10 Electrical components Power source cable and pendant ...

Page 24: ...and chain Motorized trolley Reduction gear section No flaw crack and excessive wear Well lubricated No backlash in the gears and bearings Brake mechanism Stops smoothly without coasting too long Power source cable and pendant control cable No breakage and damage of the rub ber covered cables and no disconnection Motor No humming and overheating lnsulation resistance lnsulation resistance exceeds 2...

Page 25: ...twists cracks etc When the limits of Table 9 are exceeded and when dimension H has worn down more than 95 When dimension A differs from the above recorded value of the new hook Rated load Top hook Bottom hook A Normal H A Normal H Normal Limit Normal Limit 250kg 300kg 500kg 28 27 25 7 23 23 21 9 1tw 1t 32 31 29 5 28 27 25 7 2t 33 35 33 3 33 35 33 3 Load chain Measure the sections of the load chain...

Page 26: ...en the hoist is overloaded The friction clutch is adjusted before the hoist leaves the factory and will normally not require further adjusting Emergency stop device During an emergency depress the mushroom shaped Emergency stop button the topmost button on the pendant push button switch to immediately stop the hoist and trolley When depressed the Emer gency stop button will automatically lock and ...

Page 27: ...slips down 5 to 10 cm during the test A Remove the Switch cover The structure of the Electromagnetic brake is as shown in the drawings on the right When clearance A exceeds 5 mm over 8 mm for ECC4 adjust the Electromagnetic brake as follows so that clearance A becomes 2 5 mm 4 mm for ECC4 1 Loosen the Nut with a spanner 2 Screw in the Adjusting screw with a hexagon wrench N B Screw the Adjusting s...

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