Wohler H 420 Handy Viper User Manual

: June 4, 2024
: WOHLER

Table of Contents

Wohler H 420 Handy Viper
General Information
- Notes
- Transport
Technical Data
Component explanation
Getting started
- Attaching the quick-change push-head
Using the Viper
Maintenance
Warranty and Service
Declaration of conformity
- declares that the product
Accessories
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Wohler H 420 Handy Viper

General Information

Operation Manual Information

This operation manual allows you to safely work with the Wohler H 420 Handy Viper with digital distance measurement. Please keep this manual for your information. The Wohler H 420 Handy Viper should be employed by professionals for its intended use only. Liability is void for any damages caused by not following this manual.

Notes

WARNING: Not following this warning can cause injury or death.

ATTENTION: Not following this note can cause permanent damage to the device.

NOTE: Useful information.

Intended Use

The Wohler H 420 Handy Viper with digital distance measurement is specially designed to clean flue gas systems or ductwork.
Do not use the camera for any other use than set out in this manual.

Components

Device	Components
Wohler H 420	Handy Viper with digital dis- tance measurement

GRP Rod
GRP push head for mounting stars

Transport

ATTENTION: Before transporting the viper, activate the transport lock!

To activate the transport lock push down the lever on the right side of the screen. With the transport, lock activated it will not be possible to unroll the rod.

ATTENTION: Unlock the transport lock before unwinding the GRP Rod.

Before working with the viper push the lever, which is on the right side of the screen, to a horizontal position.
The transportation lock is deactivated now, so that it will be possible to unwind the rod.

Information on disposal

Electronic equipment does not belong to domestic waste, but must be disposed of in accordance with the applicable statutory provisions. You may hand in any defective batteries taken out of the unit to our company as well as to recycling places of public disposal systems or to selling points of new batteries or storage batteries.

Manufacturer Wöhler Technik GmbH

Wöhler-Platz 1
33181 Bad Wünnenberg
Tel: +49 2953 73-100
Fax: +49 2953 73-250
E-Mail: info@woehler.coms

Technical Data

Handy Viper

Description	Data

Weight (incl. GRP

Rod, 50 feet/15 m)

| 2 kg
Braking action| Freewheel brake, precisely adjustable
Operation Temperature| Max. 60 ° C

GRP Rod

Description	Data
Length	50 ft or 65 ft (15 m or

20 m)

Cage diameter| 0.02 ft (7 mm)
Shell| PA

Cage

Description	Data
Cage diameter	1.38 ft (42 cm)
Material	VA stainless steel, with a plastic shell

Digital meter counter

Description	Data
Unit	Meter or Feet (m or ft)
Resolution	0.1
Battery	3.6 V long-term lithium battery

Component explanation

GRP rod
Cage
Belt clip
Rod clamp
Viper grip
Transport lock
Star grip screw for adjusting the freewheel brake

The rear side of the device

Star holder to hold one or two stars
Hand protection

Function

The Wohler H 420 Handy Viper is the perfect tool to clean flue gas systems or ductwork. Before working with the Viper, stars and brushes can be mounted. The exact position of the star or the brush in the duct will be indicated on the screen so that the user knows how many feet into the flue way or ductwork the rod has traveled.

Display and operating button

Wohler-H-420-Handy-Viper-FIG-7

Description

Battery condition
Length
Unit (meter or feet)
Winding (▼) or unwinding (▲)
Button Switching on, zeroing, selecting the unit

Getting started

Adjusting the freewheel brake

The freewheel brake allows wind or unwinding the GRP rod in a controlled way. This way, the rod cannot run out of the viper.
The freewheel brake is adjusted with the star grip screw on the left side of the screen.

NOTE: The freewheel brake is adjusted at the plant and normally it is not necessary to change the setting.

Increasing the braking action

Turn the star grip screw clockwise.
The rod will not run out of the cage.

Decreasing the braking action

Turn the star grip screw anti-clockwise.
You can easily pull the rod out of the basket

Mounting the Viper Stand (option)

For a secure stand, a viper stand made of stainless steel can be acquired. (see accessories). How to mount the Viper Stand:

Push the bearing surface of the stand under the seating area of the Wöhler Viper.
Turn the black screw to an upright position.

NOTE: If you constantly use the viper with the stand, we recommend connecting the viper and the stand with three screws, using the correspondent boreholes.

For a secure stand, fix the Viper Stand with your foot when working.
The Viper Stand is retractable for transport.

Mounting the push head

Rod end piece
Cone ring
Top section of a push-head

Attaching the quick-change push-head

ATTENTION: The M10 female thread of the rod-end piece (1) must be visible and in perfect condition.

Attach the cone ring (2) with the cone area pointing downwards.
Place a star on the top section of the pushhead]adapter (3). Then push the top section, with the star being attached, onto the end piece of the rod.
The clamping plate in the adapter locks the push-head adapter into place.

Removing the quick-change push-head

Grasp the recess at the top of the push-head with your thumb and index finger and withdraw the clamping plate.
You can now remove the top section.

NOTE: It is possible to place two more stars on the star holder (Abb. 4), so that the user can easily change the stars while working.

Using the Viper

Switching on and off the screen

For switching on and off the screen keep the button pressed for 2 seconds.
When the screen is switched on, the battery condition, the length of the unwinded rod, the direction of the last rod movement (▲ unwinding and ▼ winding) and the unit of the length are indicated.

NOTE: If the rod is not moved and the button is not pushed for 3 minutes, the digital distance measurement will switch off automatically.

Selecting the length unit
It is possible to select between meter (m) and foot (ft). After switching on, the last chosen unit will be indicated.

Before changing the unit switch off the device.
Now, keep the button depressed for ten seconds, until the new unit will be indicated on the screen.

Zeroing: Press the button shortly to reset the distance indication to 0.00.

NOTE: We recommend resetting the distance indication to 0.00 when the star or brush is pushed into the pipe so that you will know exactly how many feet into the flue way or ductwork you have traveled.

Winding and unwinding the rod

Unlock the transport lock (see chapter 1.5).
Unwind the rod carefully by pulling it out of the cage.

ATTENTION: When winding the rod, pay attention that it extends the whole width of the cage. Winding on one side only may provoke that the rod jumps out of the cage.

Maintenance

The Wohler H 420 Handy Viper is robust, so only a few maintenances works needs to be done.

Maintenance work

Interval	Maintenance work
Depending on the use	Change the rod
After 5 to 10 years	Change the batteries
In case of pollution	Clean the rod, the cage, and the grip with a damp cloth.

Changing the rod Unwind the GRP rod completely and pull it out of the cage sleeve.

WARNING

Pay attention when unwinding the rod. The last winding could lash out.
Push the new rod into the sleeve and wind it steadily.

ATTENTION: Pay attention that the rod end piece is positioned firmly into the sleeve.

Changing the batteries

The device has a long-term battery that only has to be changed every five or ten years. The blue LED shows the battery condition. How to change the batteries:

Pull off the screen frame.
Take the screen with the circuit board and the battery out of the device.
Disconnect the battery from the circuit board and connect a new lithium battery 3.6 V.
Return the screen with the circuit board and the battery to its previous position.
Return the screen frame to its previous position and press.

Warranty and Service

Warranty

Each Wohler H 420 Handy Viper will be tested in all functions and will leave our factory only after extensive quality control testing. If used properly, the warranty period for the Wohler H 420 Handy Viper will be twelve month from the date of sale. Not covered by the warranty is the GRP rod, because it is a consumable. This warranty does not cover the freight and packing costs when the device is sent to the factory for repair. Service by nonauthorized personnel or making modifications to the analyzer voids any warranty.

Service

Wohler has built our reputation on excellence in customer service. Therefore, of course, we are readily available to assist you after the warranty period ends.

Send us the viper and we will repair it and return it to you with our package service.
Immediate help is provided by our technical staff over the telephone.

Declaration of conformity

The manufacturer

Wöhler Technik GmbH
Wöhler-Platz 1, D-33181 Bad Wünnenberg

declares that the product

product name: Wohler H 420 Handy Viper
model number: H 420

complies with the key safety requirements set down in the guidelines of the Council for the Harmonization of the Legal Requirements of the Member States in relation to electromagnetic compatibility (2014/30/EU).

The following standards were availed of to evaluate the product in respect of electromagnetic compatibility: