PK-410 - Dryer Cabinet
Use
The unit is intended for drying and storing welding electrodes in the temperature range 50 - 400 oC.
The unit is to be used only in accordance with these instructions. Is must not be used for any other
purpose because of possible injuries or material damage.
Before use
Check the unit for transport damage; do not connect a faulty unit to the mains. Check that the
voltage and frequency marked on the rating plate match the values of the mains to which the unit is
to be connected.
Location and connection to mains
To avoid overheating, the clearance to any material must be no less than 0,5 m on any side and no
less than 1 m above the unit. Make sure that there are no obstacles and no flammable material closer
to the unit. The unit must never be covered. Place the unit in a dry place on a flat surface. The
enclosure class of the cabinet is IP 21, thus it cannot be used if susceptible to splashing water. The
unit may not be used in environments where there is danger of explosion (EX). The unit is
connected to mains either semi-permanently by screwing the connection cord to the wall outlet or by
adding an approved plug to the cord. If the connecting cord is too short it has to be replaced. Never
splice the cord or use extension cords.
Using the unit
Do not load the cabinet with packaged electrodes, they must be taken out of their package first. The
protective nets of the resistors must remain in place during operation. If the amount of electrodes is
much below capacity, the electrodes should be distributed evenly over the middle shelf to minimize
temperature gradients. Connect the unit to the mains. The pilot light (1, Fig. 1) lights up. Set the
timer (2) to the correct day of week and time. Turn the function knob (4) to position 0. Turn the
main switch (3) to position 1. Set, in the manner explained below, the drying and storage
temperatures according to the recommendations of the manufacturer of the electrodes. Using the
function knob (4), select either automatic operation (position 2), in which case the drying cycles are
determined by the timer, or manual operation (position 1), in which case the cabinet is in the drying
mode, and the temperature is according to the drying temperature instruction. The indicator light (5)
is on whenever the unit is manually set to drying. The indicator light (5) is on whenever the drying
cycle set in the timer is active. When the drying function is not active, the indicator light (6) is on,
indicating that the unit is in the storage mode.
Setting temperatures
Drying temperature
The drying temperature is regulated using a double-circuit digital temperature controller (7); two
sets of instructions can be set. Instruction 1 is that for the drying temperature, instruction 2 that for
the storage temperature. Set the drying temperature instruction as follows: Press and keep depressed
the SET 1 button, the display will show the current drying temperature instruction. Keeping SET 1
depressed, set the desired temperature using the arrow buttons. When the desired temperature is
shown in the display, release the SET 1 and arrow buttons. This will cause the display to show the
current dryer temperature. The desired drying temperature is now set. Pressing the arrow button
continuously when setting the temperature will first cause the reading of the temperature instruction
to change slowly over approx. 10 degrees, then rapidly.
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PK-410 - Dryer Cabinet
Storage temperature
The storage temperature instruction is set in the same manner as that for the drying temperature,
using the button SET 2. Keeping SET 2 depressed, set the desired temperature using the arrow
buttons. When the desired temperature is shown in the display, release the SET 2 and arrow buttons.
This will cause the display to show the current dryer temperature.
Both the drying and storage temperature settings can be checked at any time by pressing the SET 1
or SET 2 button. This will cause either the drying temperature or the storage temperature instruction
to be displayed, depending on which button was pressed.
Automatic operation
The timer may be set for timed drying and storage operation separately for seven days a week. Set
the starting time of the drying cycle by depressing a rider of the timer towards the centre. One rider
equals two hours. Separate drying cycles can be defined for each day. For automatic operation of the
cabinet, turn the function knob (4) to position 2. If no drying cycle is on, the pilot light (6) will light
up to show that the unit is in storage mode. Instruction 2, the storage temperature instruction will be
carried out. The pilot light (10) will go off and the pilot light (5) will light up when the drying
sequence commences. Instruction 1, the drying temperature instruction will be carried out. When the
drying cycle is ended, the cabinet will return to the storage mode.
Manual operation
Turn the function knob (4) to position 1. Pilot light (5) will light to indicate that the dryer is in the
drying mode, regardless of the drying and storage cycles selected by the timer.
Other matters to be considered
Keep the cover of the ventilation opening open, whenever the cabinet is in the drying mode. This
will improve the evacuation of moisture from the cabinet. The cover may be screwed down during
the storage cycle. Turning the function knob (4) and the main switch (3) to position 0 whenever the
cabinet is not in use. Turning the cabinet off by the main switch or disconnecting it from the mains
will not erase the settings. Turning the dryer off from the main switch also will not cause the timer
to stop. The timer will stop only if the unit is disconnected from the mains by dismounting the cord,
when a fuse is blown or in case a power failure occurs. The timer should then be reset when
recommencing operation.
TIMER
MAIN SWITCH
OPERATION
1= MANUAL
2= AUTO
PK- 410
DRYING
STORAGE
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Fig. 1. The control cabinet of the dryer. 1. Pilot light, 2. Timer, 3. Main switch. 4. Function knob, 5. Pilot light, 6. Pilot
light, 7. Temperature selector
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