Comeup DH-120 User manual

Heavy Duty Hoist
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Thank you for purchasing a Hoist. This manual covers operation and maintenance of
the hoist. All information in this publication is based on the latest production information available at the
time of printing. We reserve the right to make changes without notice because of continued product
improvement.
It has been designed to give safe and dependable service if operated according to the instructions.
Read and understand this manual before installation and operation of hoist. Careless hoist operation
can result in serious injury or property damage.
When requesting information or ordering replacement parts, always give the following information:
1. Hoist model and voltage
2. Serial Number
3. Item. No. and Part Number
4. Part Description
1. The hoist is rated at its top layer of wire rope on the drum for S3 Intermittent duty.
2. A minimum of five (5) wraps of rope around the drum is necessary to support the rated load.
3. Keep clear of hoist, rope, and hook while operating.
4. Wire rope can break without warning. Always keep a safe distance from the hoist and rope while under
a load.
5. Failure to adequately align, support, or attach hoist to a suitable mounting base could result in a loss
of efficiency of performance or damage the hoist, rope and mounting channel.
6. The hoist is a very powerful machine. Treat with extreme care and observe all caution and warnings.
WARNING
！

I.Safety Requirement
The operator of a hoist in some cases is required to have qualifications according to applicable
laws and ordinances.
Check all safety and environmental conditions prior to and during use.
Don’t use unsuitable rope in construction, strength or having any defects.
Don’t use an unsuitable hook and snatch block for rope.
The operator must remain with the hoist when it is being operated.
The hoist is rated at S3 25% Intermittent duty only.
Do not use the hoist as moving people.
Ensure that the hoist is connected to the correct voltage. 12V DC or 24V DC only.
Do not exceed maximum lifting load shown in tables. Shock load must not exceed these ratings.
A rope should be replaced if it shows signs of excessive wear, broken strands, corrosion or any
other defects.
If the hoist fails to lift a load under normal conditions, stop the operation within 30 seconds
otherwise motor damage may occur.
Remove the switch from the hoist when not in use.
Keep hands and clothes away from the hoist and rope.
Never unplug the remote control when hoisting a load.
To avoid insufficient power when hoisting a load, the vehicle should be running and in neutral.
If noise or vibration occurs when running, stop the hoist immediately and return it for repair.
The rope shall be wound in according to drum rotation sticker or refer to owners manual.
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General Rules
！WARNING
1. The owner and/or the operator shall have an understanding of these
operating instructions and the warning before operating the electrical
hoist. Failure to follow these warnings may result in loss of load, damage
to the hoist, property damage, personal, or fatal injury.
2. The owner shall retain this manual for further reference to important
warnings, installation, operating and maintenance instructions.

I I .Handing Precautions
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Operation Precaution
＊ To prevent the risk of electric shock, the power plug must be plugged into a matching outlet
and grounded in good condition.
＊ Never try to lift a load higher than the rated cap.
＊ Never hitch a ride on the hook, sling or load being moving.
＊ Hoists are not to be used for lifting or lowering people.
＊ Don’t work, walk or stand under an operating hoist.
＊ Always remain in control. Never neglect the hoist while actually hosting a load.
＊ While working, never stand under a lifting load or within the conveying area.
＊ Always look up when working around hoist, there is potential danger overhead.
＊ Never gravitate a load free.
＊ Be sure to lift a load vertically. Slack may allow wires to be caught in the drum.
＊ Prior to starting of use, carry out the daily checking without fail, and after confirming the safety
of function.
＊ If having a counter rotation incurred, make sure to correct its rotation direction.
＊ Prior to lift, make sure to have a precise performance of brake. If any malfunction of brake
happened, stop the operation immediately.
＊ When load suspended in air, it will not allow to be welding.
＊ Wire rope with any defects of kink, distortion , corrosion and excessive wear shall be removed
or replaced immediately.
＊ Stop the operation if there is any queer noise or vibration in the gear box to be happened.
＊ Do not connect the wire rope with the grounding of welding machine.
＊ While welding, do not have any contact with the welding objects because of having spark.
＊ Do not pull the switch.
＊ Never plugging (instant reverse-wind) or inching.
＊ Do not over duty cycle ratings.
＊ In order to prevent the layer down due to over loosening of rope irregular winding, etc.,
operate according to the suitable operating method.
＊ Use a hoist by fixing so securely that the rope around the drum is even.
＊ Be sure to fix a rope in the centre of swivel hook.
＊ Be sure to stop operation immediately when the wire rope becomes fully slackened.
＊ Avoid catching the hook or lifting a load on a fixed obstruction.
＊ Always leave the remote switch positioned immediately after use.
＊ Make sure that the load being lifting are well balanced and secured before starting.
＊ Avoid water splashes on the remote switch.
＊ Never wrap the load with the wire rope.

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● It is forbidden to lift loads above
the rated capacity of the hoist
● Do connect the power lead on the
main power source directly and
fasten them
● Ban on transporting persons ● Don’t ignore fault accessories
● Don’t stand under hoisting operation ● Don’t operate hoist in rain or snow

III.Environment Precautions
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！DANGER
The following environmental conditions may result in the possible causes of hoist trouble.
● Low temperature below -10°C, high
temperature above 40°C or humidity
above 90% conditions.
※ Cause malfunction of spare parts ※ Cause explosion
● In heavy acid or salty conditions.
● In rain or snow conditions.
● In a heavy general powder.
※ Cause malfunction of performances
● In an organic chemistry or explosive
powder conditions.
※ Cause malfunction of spare parts
※ Cause rust or short circuit

IV. Specifications
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Remarks: 1. A control box for indirect control device for DH-300 and DH-500 is standard
accessory upon delivery.
2. A control box for indirect control device for DH-120/120A/300A/500A will be
available upon request.
3. A pendant switch with an emergency stop button will be available upon request
Model DH-120DH-120A DH-300 DH-300ADH-500DH-500A
Lifting Load kg / lb 120 / 265 300 / 661 500 / 1,102
4.61/5mpf/mpmdeepS 3 / 9.8 4 / 13
Voltage (V) DC12V DC24V DC12V DC24V DC12V DC24V
ph14.0/W003ph41.0/W001)W(tuptuOrotoM
Circuit Breaker (A) 20A 10A 30A 15A 50A 30A
Gear Ratio 56:1 240:1 276:1
01)nim(gnitaRemiT-trohS
Type Galvanized 6 x 19 Galvanized 7 x 19
Wire Rope Size Ø4mm x 5m
5/32” x 16’
Ø4.8mm x12m
3/16” x 39’
Ø6.2mm x 12m
1/4” x 39’
Type Direct Indirect Direct Indirect
Power Cord 5.5mm² x 2c x 4.2m 5.5mm² x
2c x 2.9m
5.5mm² x
2c x 4.2m5.5mm² x 2c x 2.9m
Switch Cord 5.5mm² x 2c x 2.9m 0.75mm²x
3c x 4.4m
5.5mm² x
2c x 2.9m0.75mm²x 3c x 4.4m
Pendant
Switch CPB-271 CPB-161 CPB-271 CPB-161
Controls
Control Box No Yes No Yes
Hoist Weight
(kg / lb) 17 / 37.4 27 / 59.5 27 / 59.5
Weight Gross
Weight
(kg / lb)
19 / 41.9 34 / 75.0 33 / 72.8

V. Hoisting Principles
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Load Rated
Load and speed varies according to
how much wire rope is on the drum. The first
layer of rope on the drum delivers the slowest
speed and the maximum load. The top layer
of rope on the drum delivers the maximum
speed and the minimum load. For this reason,
all hoists are rated at their top layer capacities.
The flanged drum end plates shall protrude beyond the rope wound on the drum at the
top layer by at least 1.5 x the nominal rope diameter.
Calculating Head Loads
P: Rope tension
η: Sheave efficient
θ: Angle
W: Load
μ: Friction factor
First layer (Min.speed Max.load)
Half layer (Med.speed Med.load)
Top layer (Max.speed Min.load)
Flange of drum
P
W
P= W
η
P
W
P= W
2η
P
P= W
4η
W
P
WP= W
μ.
μ
P
μ
W
θ
P= Wμ.. sinθ +W.cosθ
Calculating Fleet Angle
● The hoist should be mounted as close to centre
and as perpendicular as possible to the direction
of the line pull. This will keep the wire rope fleet
angle centred on the drum as small as possible.
● If the proper fleet angle is not maintained, the
wire rope could wind onto one side of the drum.
This could cause failure of the hoist or wire rope, resulting in damage, injury or death.
● Experience has shown that the best wire rope service is obtained when the maximum fleet
angle is not more than 1.5° for smooth drums.
● Therefore the correct distance between centre of drum and of should be derived as a fleet angle
of 1.5° is the equivalents of approximately 19 cm of lead for each centimetre of overall drum
length.
θ
θ
Correct Distance
Drum Length
Fleet Angle
No. of sheaves 1 2
Roller bearing 0.98 0.96
Sleeve bearing 0.96 0.92

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Percentage Duty Cycle
The life of the hoist is depending on the conditions of the load and working frequency.
In the long time operation, make sure to use the machine within its %ED ratings.
Continuous ratings means the percentage duty cycle (%ED) is subject to the rated voltage
and a 63% of rated load.
Percentage duty cycle (%ED)＝ X 100 (%)
Tb: total sum of overall loadings operating hours.
Ts: total sum of stopping hours.
Tb + Ts = approximately 1 to 10 minutes.
！WARNING
Never hoist over the rated percentage duty cycle.
Tb
Tb + Ts
The percentage duty cycle %ED of heavy duty hoist is rated at their top layer of wire rope on the
drum and rated at a 25% percentage duty cycle (%ED)
VI.Operation
Electrical Wiring Diagram
Before using the hoist, make sure all electrical components have no corrosion or damaged;
the environment should be clean and dry. The voltage drop from the battery connections to the
hoist must not exceed 10% of the nominal voltage under normal operating condition.
Battery Recommendations
A fully charged battery and good connections are essential for the proper operation of
your hoist. The minimum requirement for battery is 650 cold cranking amp.