Mosebach Bug Killers BK15 Operation manual

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Read all instructions before using the bug killer
Contents
1) Components ............................................................................................................................... 3
Total Assembly ........................................................................................................................... 3
2) Specifications ...............................................................................................................................
a) BK10 ..................................................................................................................................... 5
b) BK15 ..................................................................................................................................... 5
c) BK20 ..................................................................................................................................... 5
3) Receiving ...................................................................................................................................... 5
) Safety ........................................................................................................................................... 6
a) Power connections ............................................................................................................... 7
b) Control Power ....................................................................................................................... 7
c) Air intakes and exhaust ports ............................................................................................... 7
d) Exhaust temperature ............................................................................................................ 8
e) Connecting and disconnecting ............................................................................................. 8
5) Operation ................................................................................................................................... 8
a) Pre-startup ............................................................................................................................ 8
b) Startup and Operation .......................................................................................................... 9
c) Shutdown ............................................................................................................................ 10
6) Bug Killing Conditions .............................................................................................................. 11
7) Troubleshooting ....................................................................................................................... 11
8) Replacing Fuses ...................................................................................................................... 12
9) Replacing Resistors ................................................................................................................. 13
10) Preventative Maintenance of the Bug killer.............................................................................. 13
11) FAQ .......................................................................................................................................... 1
12) Treatment Suggestions: ........................................................................................................... 18
13) Optional Equipment .................................................................................................................. 19
1 ) Service Parts ............................................................................................................................ 19
Figure List:
1) Total Assembly of BK Heater
2) Power Connections
3) Powering the Controls
) Thermostat
5) Thermal Switch
6) Replacing Fuses

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IMPORTANT INSTRUCTIONS
1) Components
Total Assembly
Bug Killers (BK20 Shown)
Lifting Handles
Mobility Kit (Optional)
Air Intake
Hot Air Exhaust
Figure 1b
Figure 1a
1 0VAC
Receptacles
40VAC
Receptacle
Remote Connection

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2) Specifications
Blower 1 0VAC, single phase, 60Hz powered internally
Control power 1 0VAC, single phase, 60 Hz
Rating Continuous duty
Power factor 1.0
Load elements The current at each step is subject to a manufacturing tolerance of ±5%.
Enclosure
Electro
-
statically powder coat, Blue: PPG PCTZ50108
Touch up paint is Pantone 80-c color. Plastikote custom color universal blend.
Air inlet and outlet are covered by metal screens.
Heat is discharged horizontally.
Environmental 1 0V, 850CFM fan to bring outside air into the bug killer.
Unit Weight 60 lbs.
Dimensions 0.9” x .1” x 13.4”

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a) BK10
b) BK15
c) BK20
3) Receiving
WARNING! ELECTRIC SHOCK HAZARD. Electric shock can lead to severe injury or death.
If the bug killer has been damaged in transit, do not operate until a competent
technician inspects the unit and determines that it can be operated safely.
1) Check the equipment for obvious damage.
2) Document and report any exterior damage to the carrier immediately.
Circuit Number
1
3
4
5
6
Total
Voltage (VAC) 1 0 1 0 1 0 1 0 1 0 1 0
Current (Amps) 13 13 13 13 13 13 78
Power (kW) 1.57 1.57 1.57 1.57 1.57 1.57 9.36
Circuit Number
1
3
4
5
6
Total
Voltage (VAC) 1 0 1 0 1 0 1 0 40 40
Current (Amps) 13 13 13 13 16 16 84
Power (kW) 1.57 1.57 1.57 1.57 3.84 3.84 13.9
Circuit Number
1
3
4
5
6
7
Total
Voltage (VAC) 1 0 1 0 1 0 1 0 1 0 1 0 40
Current (Amps) 13 13 13 13 13 13 40 118
Power (kW) 1.57 1.57 1.57 1.57 1.57 1.57 9.60 18.96
Figure
2a
Figure
2b
Figure
2c
Table 1c
Table 1b
Table
1a

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) Safety
This bug killer is designed for a variety of loads. Because of this, it is possible that voltages higher
that those applied can be present inside the bug killer and at external connections of the bug
killer. Work on the bug killer’s internal systems should only be attempted by highly trained
technicians and only when power has been disconnected and cannot be reconnected to the unit.
IMPORTANT INSTRUCTIONS
When using electrical appliances, basic precautions should always be followed to reduce the risk
of fire, electrical shock, and injury to persons, including the following:
1) Read all instructions before using this bug killer.
2) This bug killer is hot when in use. To avoid burns, do not let bare skin touch hot
surfaces. Use handles when moving this bug killer. Keep combustible materials, such
as furniture, pillows, bedding, papers, clothes, and curtains at least 6 feet
(1.8 meters) from the exhaust of the bug killer and keep them away from the sides
and rear.
3) Extreme caution is necessary when any bug killer is used by or near children or
invalids and whenever the bug killer is left operating and unattended.
) Remove all animals and plants from area to be heated
5) Always unplug bug killer when not in use.
6) Do not operate any bug killer with a damaged cord or plug or after the bug killer
malfunctions or has been dropped or damaged in any manner. Discard bug killer or
return to authorized service facility for examination and/or repair.
7) Do not use outdoors.
8) Do not use in wet or moist locations
9) This bug killer is not intended for use in wet indoor environments.
10) Do not run cords under carpeting. Do not cover cords with throw rugs, runners, or
similar coverings. Do not route cords under furniture or appliances. Arrange cords
away from traffic areas and where it will not be tripped over.
11) To disconnect bug killer, turn controls off, then remove plugs from outlets.
12) Do not insert or allow foreign objects to enter any ventilation or exhaust opening as
this may cause an electric shock or fire, or damage the bug killer.
13) To prevent a possible fire, do not block air intakes or exhaust in any manner. Do not
use on soft surfaces, like a bed, where openings may become blocked.
1 ) A bug killer has hot and arcing or sparking parts inside. Do not use it in areas where
gasoline, paint, or flammable liquids are used or stored.
15) Use this bug killer only as described in this manual. Any other use not recommended
by the manufacturer may cause fire, electric shock, or injury to persons.

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16) Always plug bug killers directly into a wall outlet/receptacle. Never use with a re-
locatable power tap (outlet/power strip).
17) This bug killer includes a visual alarm to warn that parts of the bug killer are getting
excessively hot. If the alarm light goes on, immediately turn the bug killer off and
inspect for any objects on or adjacent to the bug killer that may cause high
temperatures. DO NOT OPERATE THE BUG KILLER WITH THE ALARM LIGHT
ON.
18) SAVE THESE INSTRUCTIONS
.
a) Power connections
WARNING! ELECTRIC SHOCK HAZARD. All power connections must be connected or
guarded. Failure to do so will expose operators to possible shock and the
possibility of grounding-out or shorting-out of the test power source,
b) Control Power
Use 120V type S or type SJ jacketed cord to a wall connection. Cord and service
rated to 15 AMP minimum.
c) Air intakes and exhaust ports
Caution! All air intakes and exhaust ports must be clear and fully open. This bug killer
has one air intake designed for proper air flow. Reducing or blocking air flow will
lead to overheating and bug killer failure.
High volumes of cooling air are needed to prevent load elements from overheating. By their very
nature, resistors under load convert electrical energy to heat. This heat must be removed from
the unit. The blower, intake, and exhaust ports are sized to provide the proper amount of cooling
air. Preventing or limiting air flow will allow the bug killer to overheat.
To increase the life of the load elements, allow the fans to run at least three minutes after the load
is removed or until exhaust air is cool.
No ductwork is permitted on intake or exhaust of this bug killer as this will cause a backpressure
and ruin the resistors.
Caution! Material can be moved by intake air or exhaust air. Failure to secure material
could cause injury to bystanders or damage to the bug killer.
Good air flow keeps the bug killer cool but can very easily move light debris such as paper,
cardboard, and dust with great velocity. Loose materials around the bug killer, especially near the
intake and exhaust, must be secured to prevent movement. Material on the exhaust side may be
blown into and injure a bystander. Material near the intake may be taken into the bug killer
damaging internal components.

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d) Exhaust temperature
WARNING! FIRE AND BURN HAZARD. Keep flammable material at least 0 feet away from
the bug killer. A great deal of heat is expelled from the bug killer.
Temperatures inside the bug killer are sufficient to ignite flammable fumes or
materials. Failure to maintain proper housekeeping and properly securing
flammable material could lead to fire, burns, and/or injury.
Even with sufficient air flow, internal component temperature will exceed 00 °F. Exhaust air
temperature rise of 100 °F can be achieved at full power. Flammable materials must not be kept
around the bug killer. Heat from the bug killer could ignite this material.
e) Connecting and disconnecting
WARNING! BURN HAZARD. Attempting to connect or disconnect leads while bug killer is
in operation can lead to severe injury or death. Connecting or disconnecting
plugs and receptacles while current is flowing or voltage is present may cause
arcing. Arcing can generate a great deal of light, heat and possibility of
electrocution.
5) Operation
a) Pre-startup
1. Check housekeeping in the operational area and correct all unsafe conditions.
Failure to do this may result in debris being blown around and may cause a fire hazard.
2. Position bug killer so that air will flow freely into the intakes and out of the exhaust port.
3. All air intakes and exhaust ports must be clear of any blockages or debris.
. For best results it is recommended that all doors, window, vents, and air conditioners in the
heating area be insulated
5. Connect remote thermostat
6. Connect and place thermocouples to remote thermostat
• One or two thermocouples may be used
• Using one thermocouple will control bug killer based on the local temperature of that
thermocouple
• Using two thermocouples will control bug killer based on the average of the two local
temperatures of thermocouples
• When placing thermocouple(s), keep ten feet from the unit and not in direct exhaust
• When using two thermocouples, for optimal results do not place close to one another

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b) Startup and Operation
1. Connect the 120VAC plug to the right most receptacle to power the controls (See Figure
3)
2. Determine where you will get power from
Each plug utilized will draw the current shown in table 1a, 1b, or 1c. Carefully select
power sources as to not overload and trip breakers or fuses.
3. Connect all other desired 120VAC plugs and desired 2 0VAC plugs (BK15 and BK20
ONLY) into their appropriate receptacle
The bug killer will function with only the right receptacle being powered. If all of the
receptacles are not being powered the unit will reach a lower maximum temperature and
the unit will take longer to heat a space to a desired temperature, if that temperature can
be reached. It is recommended that all receptacles are powered, especially for larger
spaces or a higher desired temperature
. Ensure all cable sizes are sufficient to carry the expected current. Failure to size
conductors properly will lead to conductor overheating, which will damage conductors
and may pose a fire hazard.
5. Press the POWER button ON. The fans should now engage.
6. Adjust the desired room temperature using UP/DOWN arrows on the remote thermostat.
For recommended temperatures to kill different bug types see Time in Minutes to
Mortality Chart.
Figure 3. Powering the Controls
1 0VAC Cord
Powering Controls

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7. The bug killer will now generate heat until the temperature at the thermostat reaches the
desired temperature. The bug killer will automatically turn the heater elements on and off
as required to control to the desired temperature being sensed at the thermocouple(s).
8. Allow the bug killer to hold the temperature of the room for the recommended time shown
in table Time in Minutes to Mortality Chart.
9. Note that your bug killer thermostat is programmed with a 5 °F hysteresis value.
c) Shutdown
1. Lower thermostat value to below standard room temperature
2. Allow fans to operate at least three minutes or until exhaust air is cool before shutting
them off.
This cooling period will extend the life of your bug killer.
3. Turn POWER button OFF
. Remove all 120VAC plugs and 2 0VAC plugs (BK15 and BK20 ONLY) from the bug
killer.
5. Put cables back into the storage box. (Not supplied by Mosebach)
6. Move the unit to storage.
Room
Temperature
Desired
Temperature
Temperature
Controls
Figure . Thermostat

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6) Bug Killing Conditions
The conditions below represent the recommended run time once the entire area has
become fully heated. Enclosed spaces, such as clothes, beds, couches and drawers may
take significantly longer to reach desired temperatures than exposed surfaces in the
space being heated.
The information below has been obtained from various sources and has not been verified
independently. The results when using this information is not guaranteed.
Time in Minutes to Mortality Chart
Temperature
(°F)
Bed Bugs Flour Beetle Adults Drywood Termites
Nymphs
Argentine Ants
Adults
German Cockroach
Adults
115
7
123
265
8
58
120
2
16
33
27
126
1
9
10
2.5
16
130
1
6
1
7
7) Troubleshooting
Thermostat/Bug killer
Will Not Turn On
Make sure the correct 1 0v receptacle is powered.
Ensure POWER button is ON
Ensure thermocouples are connected.
Blower will not turn on. Check for debris preventing fan from turning.
Check control fuse (FC). See Figure 6.
Load steps will not turn
on.
Check if OVER TEMPERATURE red light is on.
Check if TIP FAULT red light is on.
Check control fuse. See Figure 6.
Check resistor continuity. See schematic.
Check resistor step fuses. See figure 6
Over temperature light.
This is an indication that the internal cabinet temperature has exceeded 150°F.
Make sure the cabinet is ventilated.
Check over temperature sensors (OTS) see figure 5.
Tip Fault Light. This indicates the unit is not level.
Do not try to operate unit while tipped or tilted more than 15° from horizontal.

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8) Replacing Fuses
Turn the fuse holder cap counter clockwise and pull the cap with the fuse attach out of
the panel.
Replace fuse with appropriate fuse size as shown on the fuse panel overlay.
Insert fuse cap into appropriate hole and twist clockwise to lock in place.
OTS Open @ 150°F
Figure 5. Thermal Switch
Fuse Holder Cap
Fuse Panel
Overlay
Figure 6. Replacing Fuses

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9) Replacing Resistors
Consult Mosebach Manufacturing Co.
10) Preventative Maintenance of the Bug killer
1. Do not use a power washer to clean off the exterior of the unit. It is high voltage
electrical equipment.
Component Action Frequency
Entire Unit Walk around the load bank
and inspect for :
a) Obvious Damage
b) Loose hardware
Check every use
All exterior bolts that hold the
sheet metal.
Tighten the ¼-20 hardware to
5 ft.-lbs.
Check monthly.
Resistance readings Using an ohm meter, check
each step for the correct
resistance. The reactors
should have continuity
between input and output.
These values are part of
Appendix B wiring schematic.
Check every 6 months
Electrical Components/ Wiring Check throughout the unit for
loose wires, or electrical
components that are no longer
secure to their mounting plate.
Check every 6 months
Fan Check the fan for damage that
could cause the airflow to
change such as damaged or
missing bearing, or damaged
blades.
Check Annually
Contactors Ensure contacts are opening
and closing
Check Annually

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11) FAQ
F requently A sked Q uestions
About BK Heaters (BK10, BK15, and BK20)
How many different models of the BK Heater are there?
There are (3) different models: the BK10, the BK15, and the BK20.
The BK10 has (6) 120V inputs. Each input draws 13A for a total of 79A.
The BK15 has ( ) 120V inputs and (2) 2 0V inputs. The 120V inputs each draw 13A for a total of
52A. The 2 0V inputs each draw 15A for a total of 30A.
The BK20 has (6) 120V inputs and (1) 2 0V input. Each input draws 13A for a total of 79A. The
2 0v input draws 0A.
Why are there six 120V inputs on the BK10 and BK20?
The 120V inputs can supply only a limited power based on the size of the circuit. The six (6)
inputs split the total amperage draw of 79A into one (1) 1 input (for the master connection) and
five (5) 13A inputs, allowing each connection to draw power from a 120V power supply on a 15A
circuit without tripping a breaker or blowing a fuse.
Which of the 120V extension cords must be plugged in for use?
The master / control power 120V extension cord must be plugged in or the unit will not operate.
This input is the one labeled 15A.
Do I need all six 120 volt extension cords plugged in?
No, the units will run with fewer than six cords plugged in but at a reduced heat output. We
recommend using all six plugs as that will allow the unit to produce the most heat which provides
the quickest heating time, the ability to treat a larger space than with fewer than all six plugs, and
to ensure that the desired temperature is reached.

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Can I use all six 120 volt extension cords and the 2 0 volt extension cord at the same
time?
The BK20 and BK15 are designed to use both 120 volts and 2 0 volts at the same time.
What size power cord should I use?
It depends on how long the extension cord is. For 120 volts the wire must be at least #1 wire for
up to 50 feet and #12 wire for anything above 50ft. For 2 0 volt, minimum wire size is a #6 for up
to 100 feet. For other lengths, please contact Mosebach Manufacturing.
What size space can be treated with a BK Heater?
Treatment times will vary depending on the type of construction and the conditions of the
treatment area, the objects in the treatment area, and the voltage supplied to the unit. Our testing
was in a 256 square foot chamber with 8 foot ceilings constructed of Styrofoam (R-10 insulation).
How long will a treatment take?
Treatment must be long enough to ensure that the bugs and eggs are subjected to lethal
temperatures and times. This means that after the initial rise to desired temperature, that there
will be a period of time where that high temperature is maintained to allow the heat to penetrate
any objects being treated. This would likely be several hours, but will depend largely on how
quickly the objects being treated absorb heat. Spacing out the objects in the treatment area and
circulating the heat will aid in the objects absorbing heat from the air.
Why is it taking so long to heat the area?
There are many factors that affect heating times. They include size of the area, voltage levels in
the building and construction of the space. Please see Heating Time Section in the owner's
manual. Heating times can be decreased by adding insulation or covering doors, windows, vents,
etc.
Where can I use a BK Heater?
The unit must have adequate power supply (refer to the spec sheet or quote for voltage,
amperage, and power consumption). Supplying voltages other than those listed may result in
decreased performance. The unit must be powered such that it is grounded and the power supply
must be fused and grounded. The unit is rated for indoor use only.

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Should I keep the heater inside the heated area?
The heater will work best if the heater is kept inside the area being heated. The sensors must
remain in the area. The included thermostat can be used either inside the room or outside of the
room.
Can I keep the Thermostat inside the heated area?
Yes. The Thermostat can be left inside the heated area.
Where should I place the sensors?
At least one sensor should be placed at ceiling level above and in front of the heater’s exhaust. It
is most likely the hottest place in the treatment area. The other sensor can be placed anywhere
in the treatment area.
What should be my set point on the Honeywell controller?
The controller is preset at the factory for a temperature of 135°F. The operator must verify that
any objects in the treated area are allowed to be at the treatment temperature and for the
duration of the treatment. If the area has fire suppression (sprinkler) system, the operator must
ensure that treatment does not exceed the allowable temperature of the fire suppression
(sprinkler) system.
What should the differential be?
We suggest 5 degrees.
I want to use a generator. What kind of generator do you recommend?
For our recommended generator, please refer to the BK Accessories quote. If you have not
received an Accessories quote, contact a Mosebach sales representative.
I hear a continuous clicking sound, what’s wrong?
Clicking means that there is not enough air being moved through the heater. Sometimes the
clicking does not start until the area is heated. In both cases the most common cause is low
voltage. Increase the size of the wire being used in the extension cords or reduce the cord’s
length. The BK heaters are rated for 120V or 2 0V single phase electric. Supplying less voltage
may result in insufficient airflow causing the clicking sound.

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The fan is running, but there is no heat.
First, check the connection of the thermostat unit and set points.
Second, make sure the air intake is further than three feet from a wall and it is unobstructed.
Lastly, verify the power supply / voltage to the master / control plug is correct.
Who can I contact with additional questions?
If you have any additional questions or concerns, please contact Mosebach Manufacturing at
[e-mail]. Please provide the serial number, part number, contact
information and a detailed description of the question or concern.

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12) Treatment Suggestions:
Adjustments must be made to treatment procedures for the given conditions in a treatment area.
Effective treatment may require larger or multiple heaters depending on the size and conditions of
a given treatment area. Correct power must be supplied to the unit. Please refer to the quote for
rated voltages and amperages.
Treatment Recommendations
1. Use seals to block any gaps in the doors
2. High temperature insulation to cover vents, air conditioners, isolate spaces and cover cement
3. Insulate windows
. Insulate / cover any vents or through-wall AC units
5. Furniture might have to be rearranged for better heat circulation (including mattress and box
spring)
6. Fans to help circulate the heat are recommended. Fans must be rated to run in high
temperature and should have low amperage draw to prevent tripping a breaker and losing
treatment time.
7. Correct voltages must be applied for the heaters to run properly. The BK heaters are rated for
120V and 2 0V single phase
8. The starting temperature of the area will affect the time needed to reach temperature. A very
cold area will take longer to reach lethal temperatures than a warm one.
9. Use more or larger BK heaters per treated area
10. Thermostat may be outside of the treated area where it can be easily monitored. It may also
stay inside a treated area, though any entry into an area being treated will result in heat loss.
11. Any fan or ventilation system that either draws in outside air or vents out the heated air from
the treatment area will result in heat loss.
12. Any door or window that is left open, even slightly, will result in heat loss.
13. Every space is different, and treatment procedures must be adjusted to accommodate the
particulars of the space being treated.

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13) Optional Equipment
1 ) Service Parts
Description Part Number
25’ Cable Set
CS-BK 0
CS-BK15
CS-BK10
Mobility Kit MK-1
Har Protective Case Case-BK
BK10 BK15 BK20
Part Number
Fan BLWR-0055-00 3
Resistor
Elements
RA-0400-0031-1
RA-0400-0031-
RA-0400-0031-1
RA-0400-0033-1
RA-0400-0033-
RA-0400-0033-3
RA-0400-0033-4
RA-0400-0031-1
RA-0400-0031-
RA-0400-0031-3
RA-0400-0031-4
Fuses 10A = EC-9500-1577
0A = EC-9500-1578
Temperature
Controller EC-9500-1391
Thermocouples EC-9500-139
Remote
Thermostat
Cor
WA-0055-0044
Contactors EC-9500-1367

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3 ECN 3808 – Updated cover page and format, added figure list DMK 11/30/16
2 ECN 3775 – Updated table 1b and Section DMK 10/26/16
1 ECN 3 9 – Added FAQ and Treatment suggestions section DMK /13/16
Rev. Description Rev. By Date
Copyright © 2013 Mosebach Manufacturing Company
MOSEBACH MANUFACTURING COMPANY
1 17 McLaughlin Run Road • Pittsburgh, PA 152 1-3103 USA
T: 12.220.0237 Customer Care
F: 12-220-0236
www.mosebachresistors.com
OM-BK.doc July 23, 2015
“SAVE THESE INSTRUCTIONS”