Mosebach BK17 Operation manual

BK17 Heater
2
Read all instructions before using the heater
Contents
1) Components ............................................................................................................................. 3
Total Assembly ......................................................................................................................... 3
2) Specifications ........................................................................................................................... 4
a) ower Specifications ............................................................................................................ 4
3) Receiving .................................................................................................................................. 4
4) Safety ....................................................................................................................................... 5
a) ower connections ............................................................................................................... 6
b) Control power ....................................................................................................................... 6
c) Air intakes and exhaust ports ............................................................................................... 6
d) Exhaust temperature ............................................................................................................ 7
e) Connecting and disconnecting ............................................................................................. 7
5) Operation .................................................................................................................................. 8
a) re-startup ............................................................................................................................ 8
b) Startup and operation ........................................................................................................... 8
c) Shutdown ............................................................................................................................ 10
6) Bug Killing Conditions ............................................................................................................ 10
7) Troubleshooting ...................................................................................................................... 11
8) Replacing Fuses ..................................................................................................................... 12
9) Replacing Resistors................................................................................................................ 12
10) reventative Maintenance of the Heater ................................................................................ 13
11) FAQ ........................................................................................................................................ 14
12) Treatment Suggestions .......................................................................................................... 17
13) Service arts .......................................................................................................................... 18
Figure List:
1) Total Assembly of BK17 Heater
2) lug anel
3) owering the Controls
4) Thermostat
5) Thermal Switch and Fuses
6) Replacing Fuses

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IM ORTANT INSTRUCTIONS
1) Components
Total Assembly
BK17
Lifting
Handles
Air Intake Hot Air Exhaust
Figure 1b Figure 1a
120VAC
Receptacles
240VAC
Receptacles
Figure 1c
ain Power
Switch
Digital
Thermostat
Resistor
Power Switch
Ready
Light
Switch
Panel

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2) Speci ications
Blower 120VAC, single phase, 60Hz powered internally
Control power 120VAC, 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, Red: PPG PCT69118
Air inlet and outlet are covered by metal screens.
Heat is discharged horizontally.
Environmental 120V, 850CF fan to bring outside air into the heater.
Unit Weight 26 lbs.
Dimensions BK17: 17.5” x 22.6” x 12.1”
a) Power Specifications
3) Receiving
WARNING! ELECTRIC SHOCK HAZARD. Electric shock can lead to severe injury
or death. I the heater has been damaged in transit, do not operate
until a competent technician inspects the unit and determines that it
can be operated sa ely.
1) Check the equipment for obvious damage.
2) Document and report any exterior damage to the carrier immediately.
Circuit Number
1
2
3
4
Total
Voltage (VAC) 120 120 240 240
Current (Amps) 14 14 24 32 84
Power (kW) 1.68 1.68 5.76 7.68 17
Figure
2
Table
1

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4) Sa ety
This heater is designed for a variety of loads. Because of this, it is possible that voltages
higher that those applied can be present inside the heater and at external connections of
the heater. Work on the heater’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 heater.
2) This heater is hot when in use. To avoid burns, do not let bare skin touch hot
surfaces. Use handles when moving this heater. Keep combustible materials, such
as furniture, pillows, bedding, papers, clothes, and curtains at least 6 feet
(1.8 meters) from the exhaust of the heater and keep them away from the sides and
rear.
3) Extreme caution is necessary when any heater is used by or near children or invalids
and whenever the heater is left operating and unattended.
4) Remove all animals and plants from area to be heated
5) Always unplug heater when not in use.
6) Do not operate any heater with a damaged cord or plug or after the heater
malfunctions or has been dropped or damaged in any manner. Discard heater 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 heater 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 heater, 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 heater.
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.
14) A heater has hot and arcing or sparking parts inside. Do not use it in areas where
gasoline, paint, or flammable liquids are used or stored.

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15) Use this heater only as described in this manual. Any other use not recommended by
the manufacturer may cause fire, electric shock, or injury to persons.
16) Always plug heater directly into a wall outlet/receptacle. Never use with a re-locatable
power tap (outlet/power strip).
17) This heater includes a visual alarm to warn that parts of the heater are getting
excessively hot. If the alarm light goes on, immediately turn the heater off and inspect
for any objects on or adjacent to the heater that may cause high temperatures. DO
NOT O ERATE THE HEATER 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 o grounding-out or shorting-out o
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 AM minimum.
c) Air intakes and exhaust ports
Caution! All air intakes and exhaust ports must be clear and ully open. This
heater has one air intake designed for proper air flow. Reducing or blocking
air flow will lead to overheating and heater 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. reventing or limiting air flow will allow the heater 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 heater 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 heater.

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Good air flow keeps the heater cool but can very easily move light debris such as paper,
cardboard, and dust with great velocity. Loose materials around the heater, 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 heater damaging internal components.
d) Exhaust temperature
WARNING! FIRE AND BURN HAZARD. Keep lammable material at least 40 eet
away rom the heater. A great deal o heat is expelled rom the heater.
Temperatures inside the heater are su icient to ignite lammable
umes or materials. Failure to maintain proper housekeeping and
properly securing lammable material could lead to ire, burns, and/or
injury.
Even with sufficient air flow, internal component temperature will exceed 400 °F. Exhaust
air temperature rise of 100 °F can be achieved at full power. Flammable materials must
not be kept around the heater. Heat from the heater could ignite this material.
e) Connecting and disconnecting
WARNING! BURN HAZARD. Attempting to connect or disconnect leads while
heater is in operation can lead to severe injury or death. Connecting or
disconnecting plugs and receptacles while current is lowing or
voltage is present may cause arcing. Arcing can generate a great deal
o light, heat and possibility o electrocution.

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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. osition heater 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.
4. For best results it is recommended that all doors, window, vents, and air conditioners in
the heating area be insulated
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 1. Carefully select power sources
as to not overload and trip breakers or fuses.
3. Connect all other desired 120VAC and 240VAC plugs.
The heater 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
4. 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. ut the Main ower switch in the ON position. The fans should now engage, and the
digital thermostat should turn on.
6. To adjust the desired room temperature, put the Heat Applied switch in the ON position to
engage the resistors. ress the SET button on the thermostat, then use the U /DOWN
arrows to change the value displayed on the digital thermostat to the desired
temperature. For recommended temperatures to kill different bug types see Time in
Minutes to Mortality Chart.

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7. The heater will now generate heat until the temperature at the thermostat reaches the
desired temperature. The heater 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 heater to hold the temperature of the room for the recommended time shown in
table Time in Minutes to Mortality Chart.
9. Note that your heater thermostat is programmed with a 2 °F hysteresis value.
SET Button
Temperature
Display
Temperature
Controls
Figure 4. Thermostat
Figure 3. Powering the Controls
120VAC Cord
Powering Controls
aster
Plug

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c) Shutdown
1. ut the Heat Applied switch in the OFF position and 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 heater.
3. ut the Main ower switch in the OFF position.
4. Remove all 120VAC plugs and 240VAC plugs from the heater.
5. ut cables back into the storage box. (Not supplied by Mosebach)
6. Move the unit to storage.
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 4 27
126 1 9 10 2.5 16
130 1 4 6 1 7

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7) Troubleshooting
Thermostat/Heater Will
Not Turn On
ake sure the master 120V receptacle is powered.
Ensure ain Power switch is in the ON position.
Blower will not turn on. Check for debris preventing fan from turning.
Check control fuse (FS1). See Figure 5.
Load steps will not turn
on.
Check over temperature sensors (OTS). See Figure 5.
Check control fuse. See Figure 5.
Check resistor continuity. See schematic.
Check resistor step fuses. See Figure 5.
Check the temperature set point (SP).
Over temperature light.
This is an indication that the internal cabinet temperature has exceeded 150°F.
ake sure the cabinet is ventilated.
Check over temperature sensors (OTS). See Figure 5.
Figure 5. Thermal Switch and Fuses
Step Fuses
Control OTS
Control Fuse
(FS1)
Resistor OTS
(on
the underside of the
second resistor
from
the top)

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8) Replacing Fuses
Using a #2 hillips head screwdriver, remove the 18 screws from the cover panel.
Carefully remove the panel from the unit. Service on fuses can then be performed.
9) Replacing Resistors
Consult Mosebach Manufacturing Co.
#10
-
24 Truss
Head Bolt
Figure 6. Replacing Fuses

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10) Preventative Maintenance o the Heater
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 BK17 Heaters
Why are there two 120V and 240V inputs?
The 120V and 240V inputs can supply only a limited power based on the size of the
circuit. The four inputs split the total amperage draw of 82A into two 14A input (for the
master connection and second step), one 24A input, and one 32A input, allowing each
connection to draw power from a 120V or 240V power supply on a 15A, 25A, and 35A
circuit without tripping a breaker or blowing a fuse.
Which o the 120V extension cords must be plugged in or use?
The master / control power 120V extension cord must be plugged in or the unit will not
operate. This input is the one labeled Master.
Do I need all 120V and 240V extension cords plugged in?
No, the units will run with fewer than four cords plugged in but at a reduced heat output.
We recommend using all four 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 four plugs, and to ensure that the desired temperature is reached.
Can I use the 120 volt extension cords and the 240 volt extension cords at the
same time?
The BK17 is designed to use both 120 volts and 240 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 #14
wire for up to 50 feet and # 12 wire for anything above 50ft. For 240 volts, minimum wire
size is a #6 for up to 100 feet.

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What size space can be treated with a BK17 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. lease 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 BK17 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.
Should I keep the heater inside the heated area?
The heater will work best if the heater is kept inside the area being heated.
What should the di erential be?
We suggest 2 degrees.

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I want to use a generator. What kind o generator do you recommend?
For our recommended generator, please refer to the BK17 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 BBHD heater is rated for 120V or 240V single phase
electric. Supplying less voltage may result in insufficient airflow causing the clicking
sound.
The an 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]. lease 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. lease refer to the quote for rated voltages and amperages.
Treatment Recommendations:
1. Use seals to block any gaps in the doors.
2. Use high temperature insulation to cover vents and air conditioners, isolate spaces, and
cover cement.
3. Insulate windows.
4. 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 BK17 heaters
are rated for 120V and 240V 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 multiple heaters for larger areas.
10. 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.
11. Any door or window that is left open, even slightly, will result in heat loss.
12. Every space is different, and treatment procedures must be adjusted to accommodate
the particulars of the space being treated.

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13) Service Parts
2 ECN 3818 – Updated cable requirements DMK 12/6/2016
1 ECN 3775 - Updated Section 4 DMK 10/26/2016
0 Initial Release DMK 10/18/2016
Rev. Description Rev. By Date
Copyright © 2016 Mosebach Manufacturing Company
MOSEBACH MANUFACTURING COM ANY
1417 McLaughlin Run Road • ittsburgh, A 15241-3103 USA
T: 412.220.0237 Customer Care
F: 412-220-0236
www.mosebachresistors.com
OM-BK17.doc October 18, 2016
“SAVE THESE INSTRUCTIONS”
Description Part Number
Fan BLWR-0055-0112
Resistor
Elements
RA-0400-0043-1
RA-0400-0043-2
RA-0400-0043-3
RA-0055-0043-4
Fuses
5A = AGC-5
15A = EC-9500-1971
20A = EC-9500-1578
25A = EC-9500-1997
30A = EC-9500-1998
Temperature
Controller EC-9500-1872
Thermistor EC-9500-1871
Contactors EC-9500-1874