Buhnen HB 700 User manual

Operating Manual
Hot Melt Applicator
HB 700 / HB 700 Spray

2
1 General 4
1.1 Scope of use 4
1.2 Technical data 4
2 Safety instructions 5
2.1 Potential hazards 5
2.2 Instructions for safe operation 5
3 Starting 6
3.1 Connecting up 6
3.1.1 Connecting up (operation without working bracket/workstation) 6
3.1.2 Connecting up (operation with working bracket/workstation) 6
3.2 Switching on 6
3.3 Settings on the temperature regulator 7
3.3.1 Setting the working temperature 7
3.3.2 Reading out and setting the control parameters 7
4 Operation 8
4.1 Operating position 8
4.2 Charging 9
4.3 Discharging and metering melt 9
4.4 Adjusting the spray pattern (HB 700 Spray only) 10
4.5 Automatic temperature reduction (ACE) 10
4.6 Switching off 10
5 What if... 10
5.1 Status and error messages in the display 10
5.2 Troubleshooting 11
6 Servicing/maintenance 12
6.1 Service intervals 12
6.2 Cleaning 12
6.2.1 Cleaning the nozzle 13
6.3 Nozzle systems 13
6.3.1 Replacing the cone nozzle (HB 700) 13
6.3.2 Replacing the nozzle end (HB 700) 13
6.3.3 Altering the nozzle positioning (HB 700) 14
6.3.4 Replacing the swirl nozzle, pressure spring & ball (HB 700 Spray) 14
6.4 Adjusting the cover pressure 14
6.5 Replacing the cover gasket 15
6.6 Replacing the valve assembly 16
6.7 Replacing the (complete) cover 17
7 Repairs 18
8 Warranty 18
9 Disposal 18
Table of Contents

3
Working bracket
Workit
Applicator
Pos. Description Pos. Description
1Compressed air
connection 10 Lever
2 Water separator 11 Closure cap
3 Pressure regulator 12 Suspension point
4 Pressure gauge 13 Protection cap
5 Digital display 14 Spray air choke
6 Start/Stop button 15 Protection cap
7 Set button 16 Trigger
8 Down button 17 Handle
9 Up button 18 Stand hoop
Arrangement

4
1 General
Please read this Operating Manual through carefully and completely before rst using the
Applicator. Pay particular attention to the safety instructions in Section 2.
This Operating Manual must always be within easy reach for any user.
1.1 Scope of use
The HB 700/HB 700 Spray Applicator is for the melting and metered discharge of melts
(thermoplastic substances such as hot-melt adhesives, waxes, etc.) as a bead (HB 700)
or spray-on coating (HB 700 Spray) using interchangeable application tools (use as inten-
ded).
1.2 Technical data
Model HB 700 HB 700 Spray
Part No. H212500, H212600,
H212700, H212800
H213500, H215700,
H215800, H215900
Kit includes Applicator, toolset, working bracket / workstation (optional)
Weight approx. 3.09 lbs / 1.4 kg approx. 3.75 lbs / 1.7 kg
Power connection 120 V AC / 60 Hz
Power requirement [W] 600
Power consumption [A] 5
Protection (as per DIN IEC 34 T5) IP30
Safety class
(as per DIN VDE 0720)
I (safety earth terminal)
Temperature control electronic
Temperature limitation thermal cut-out (500 °F ±19.8 °F / 260 °C ±11 °C)
Operating temperature 104 °F…410 °F / 40 °C…210 °C
Temperature constancy ±3.6 °F / ±2.0 °C
Factory presetting 356 °F / 180 °C
Temperature indication digital via LED display
Automatic temperature reduction
(ACE)
Factory preset to reduce temperature by 104 °F / 40 °C
after 30 min non-use
Warm-up time [min] ~3.0…4.0
Hot-melting capacity (dependent
on melt)
with cartridges: 7.05 lbs / 3.20 kg
with granulate: 2.87 lbs / 1.30 kg
Capacity of melt reservoir 7.76  oz / 200 ml
Conveyor system compressed air
Compressed-air connection max. 145 psi / 10 bar (service unit with quick-action coupling)
The compressed air must be condensate- and acid-free
Operating pressure 21.8…87.0 psi / 1.5…6.0 bar
Protection against overpressure limited by reducing valve to 87 psi / 6 bar
Air consumption (at 72.5 psi /
5 bar operating pressure)
33.8  oz / 1 l per trigger actuation max. 1 l/s
Nozzles (standard) cone nozzle Ø 1.5 mm swirl spray head Ø 1.5 mm
Length of supply line with
electrical and pneumatic connec-
tions
9.84 ft / 3.0 m
Recommended melting stock BÜHNEN hot-melt adhesives in cartridge or granular form
General

5
2 Safety instructions
2.1 Potential hazards
Danger!
Never point the operation-ready device at people.
Danger from high pressure!
Burn Hazard
Nozzle (1) and molten adhesive can be over 390 °F / 200 °C hot.
Wear heat-resistant gloves if contact is unavoidable.
Risk of Explosion!
When working with oxygen or combustible gases there is risk of explosion!
Odor nuisance!
Hot-melt adhesives give off fumes which can cause odour nuisance – so ensure adequa-
te ventilation.
Improper use may in isolated cases lead to irritation of the mucous membrane. In this
case seek immediate medical advice!
2.2 Instructions for safe operation
Guard against malfunctions and operating errors by always following these instructions
precisely:
• In no circumstances may the maximum permitted operating pressure (87 psi / 6 bar) be
exceeded.
• Remove combustible or heat-sensitive objects from the area of the nozzle (1).
• When warm the device must be put down on the support hoop (18) or working console.
It must not be laid on its side.
Otherwise melt may escape uncontrolled through the vent holes and present a burn
hazard.
• Never operate the trigger (16) forcibly.
• Protect the device from moisture and damp (protection against electric shock).
• Observe the instruction leaet for the hot-melt adhesive (protection against processing
errors).
• Operate the device only with the nozzle pointing downwards. It must not be operated
above head height!
• Unplug from the mains before performing any operation on the device (servicing, clea-
ning).
• The device must be powered only from sockets with a protective conductor.
• Any extension cable used must have a protective conductor. Check that the protective
conductor is undamaged before use.
• Unplug from the mains after each use. Allow the device to cool down completely before
putting it away.
• If you notice any damage to the device or leads, unplug from the mains immediately.
Have the device promptly checked over by an expert. It must not be used again until it
has been properly repaired (see Sections 6 and 7).
Safety instructions

6
3 Starting
3.1 Connecting up
3.1.1 Connecting up (operation without working bracket/workstation)
To connect up the device proceed as follows:
1. Fit the stand:
• To do this insert pin (B) of the base (1) into hole
(A) in the casing.
• Move the base (1) in direction (C) until it is just
in contact with the casing.
• To dismantle the base do the above in reverse
order.
2. Place the device on the base and stand hoop.
3. Fit the supplied pressure-reducing valve to a quick-action coupling in the compressed-
air supply. The water separator must be facing downwards when you do this.
Observe the requirements made of the compressed-air supply (Section 1.2, “Technical
data“).
4. Set the operating pressure to 58 psi / 4 bar with the pressure regulator (3).
5. Connect the mains plug to a socket outlet with earthing contact.
The device is now ready for use.
3.1.2 Connecting up (operation with working bracket/workstation)
To connect up the device proceed as follows:
1. Place the device in the working bracket.
2. Attach the working bracket’s compressed-air connection (1) (see illustration on p. 3) to
the compressed-air supply.
Observe the requirements made of the compressed-air supply (Section 1.2, “Technical
data“).
3. Set the operating pressure to 58 psi / 4 bar with the pressure regulator (3).
4. Connect the mains plug to a socket outlet with earthing contact.
The device is now ready for use.
3.2 Switching on
To switch the device on press and hold the Start/Stop button (6) for at least 1 s.
The digital display lights up and indicates the current temperature. The device heats up
immediately to the preset temperature (target temperature). The decimal point on the left
ashes until the target temperature has been reached.
The target temperature can be displayed by pressing the Set button (7).
Starting

7
3.3 Settings on the temperature regulator
3.3.1 Setting the working temperature
1. To set the working temperature press the Set button. The current working temperature
is displayed.
2. Hold the Set button down. Select the required working temperature using the Up/Down
buttons.
Briey pressing the Up or Down button changes the working temperature in steps of
1 °F / 1°C per button-press. Pressing the button for longer changes the working tempe-
rature continuously.
The new setting is saved automatically when the buttons are released.
3.3.2 Reading out and setting the control parameters
Pressing the Up and Down buttons simultaneously for at least 4 s brings up a parameter
list. Some parameters can be set, others only read out. The table below summarises the
parameters:
Para-
meter
Function Settable Setting
range
Standard
value
Customer
value
P1 Setpoint lowering
If the device is not used for some time, the
temperature regulator automatically switches to
operation at lowered temperature. A temperatu-
re is adjusted to which is below the set working
temperature by the value set here.
✓1…180 °F
1…100 °C
72 °F
40 °C
P2 Waiting time before setpoint lowering
If the device is not used for longer than the time
set here, temperature lowering starts.
✓1…999 min 30 min
P11 Hours-run counter
The hundreds, tens and units digits are displayed.
-
P12 Hours-run counter
The thousands digits are displayed.
-
P13 Number of actuations
The hundreds, tens and units digits are displayed.
-
P14 Number of actuations
The thousands digits are displayed.
-
P19 Keylock
Adjustment of working temperature with the Up/
Down buttons can be locked here.
If an attempt is made to adjust the working tem-
perature despite the keylock, the display shows
“--”
0: not locked
1: locked
✓0 or 1 0
You can browse upwards through the parameter list with the Up button and downwards
with the Down button. Press the “Set” button to display the value assigned to a parameter.
You can adjust the value assigned to a settable parameter by additionally pressing the
Up/Down buttons.
The diagram below shows the procedure schematically:
Starting

8
SET
SET
SET
SET
+
+
+SET +
-
>4 s
P1
P2
P11
…
Display
value
Set
value
(only P1, P2, P19)
Fig. 3.3.2/1: Setting parameters
4 Operation
4.1 Operating position
The device may be operated only with the nozzle pointing downwards. In other positi-
ons melt may get into the compressed-air ducts and damage the device.
Fig. 4.1/1: Permitted operating position
Operation

9
4.2 Charging
Burn hazard!
Nozzle and molten adhesive can be over 392 °F / 200 °C hot. Always wear heat-resistant
gloves when performing the steps described below.
1. Place the device in the working bracket or on the base.
2. Switch the device on (see Section 3.2). Wait until the working temperature has been
reached.
3. Take hold of the device by the handle with one hand (17). With the other hand turn the
lever (10) clockwise through 180º and swivel the closure cap open.
4. Fill the tank to a level not less than 2 cm below the rim. The maximum level is marked
on the device with a sticker (see illustration left). Do not charge the device above this
level since the melt expands when heated.
5. Swivel the closure cap back. Turn the lever (10) anticlockwise as far as it will go, in
order to lock the cap.
4.3 Discharging and metering melt
1. Place the device in the working bracket or on the base.
2. Switch the device on. Wait until working temperature has been reached.
3. Check that there is enough melt in the tank.
Burn hazard!
If the device is “run dry” drops of melt may escape uncontrolled and endanger the opera-
tor and persons in the vicinity.
Every time you actuate the trigger, therefore, rst carry out step (3.) above.
4. Actuate the trigger (16)
You can meter the quantity discharged by altering the pressure (max. 87 psi / 6 bar) at
the pressure regulator (3) and/or selecting an appropriate nozzle.
5. After the trigger (16) has been released the compressed-air supply is cut off immedia-
tely and the tank vented.
max. Level
Operation

10
4.4 Adjusting the spray pattern (HB 700 Spray only)
The spray pattern is altered by adjusting the spray air.
Set the optimum spray pattern by turning the spray-air choke (14) in the protective sleeve
(13):
• Turning it clockwise decreases the spray-air pressure.
• Turning it anticlockwise increases the spray-air pressure.
4.5 Automatic temperature reduction (ACE)
Unnecessary thermal loading of the melt should be avoided. The device therefore swit-
ches to standby mode at reduced temperature when the trigger has not been actuated for
a considerable time (paused operation).
In the condition as supplied the temperature is reduced by 72 F / 40°C after 30 minutes’
paused operation. The programming of the relevant parameters is described in Section
3.3.2.
Briey actuate the trigger or the Up or Down button to quit standby mode. The device
immediately reheats to working temperature.
4.6 Switching off
1. Press the Start/Stop button (6) for approx. 1 s until the display goes out.
2. Adjust the operating pressure down to “0” with the pressure regulator (3) or disconnect
the compressed-air supply.
5 What if...
This Section summarises the status and error messages and provides help in eliminating
errors.
If malfunctions occur please check rst
• hat the power supply and
• compressed-air supply are functioning correctly, and
• whether there is mechanical damage to the device or supply lines (power supply, com-
pressed air).
If you nd any mechanical damage, the device may in no circumstances be started up
again. Have it checked and repaired by a qualied service agent.
5.1 Status and error messages in the display
Indication Cause Action
Decimal point on left ashes Warm-up phase active The warm-up phase is ended when a tem-
perature 2 °F / 2°C short of the set working
temperature has been reached.
Decimal point on right is lit Setpoint lowering active See parameters P1 and P2 (Section 3.3.2)
ERR Permitted maximum tem-
perature of 500 °F / 260 °C
exceeded
Allow to cool down
F1L Sensor fault, short circuit Have the device checked by a qualied
service agent.
F1H Sensor fault, sensor breakage Have the device checked by a qualied
service agent.
-- Keylock active See parameter P19 (Section 3.3.2)
EP Data loss in parameter memory The regulator must be replaced by a quali-
ed service agent.
What, if…