Duke ReadyFlex RFHU-23R User manual

P/N 529906
REV B 05/04/2021
SHELF CONTROL
MODELS
RFHU-23R
RFHU-25S
U.S. and Foreign Patents Pending
This manual is Copyright © 2021 Duke Manufacturing Co. All rights reserved.
Reproduction without written permission is prohibited. Duke is a registered
trademark of the Duke Manufacturing Co.
CAUTION: Please read this manual completely before attempting
to install, operate or service this equipment
Installation and
Operation Manual
WARNING for CA residents: go to www.dukemfg.com/prop65 for prop 65 warning

RFHU Operator’s Manual - Shelf Control
2
MANUFACTURER’S INTRODUCTION
The ReadyFlex™ Holding Unit (RFHU) delivers unsurpassed culinary performance for a broad
variety of food products in a exible, easy to use, easy to learn, adaptable format thus addressing
the needs of the restaurant operations and protability.
The Duke ideal holding curve, the DNA of the RFHU, has been developed, improved, and rened
since Duke introduced the rst product holding unit in 1999. Utilizing the innovative top and
bottom patented Duke technology HeatSinksTM, extended hold times with improved food quality
and consistency are achieved.
With the ReadyFlex™ holding unit, you can oer new menu items without limitation on how to
hold them; change your recipes and hold congurations. Independent top and bottom heat zones
are programmable to dial in perfect recipes for any food….no compromises.
The easy to use, easy to learn touchscreen user interface is visual, smart, intuitive and colorful. In-
store control and programming is easy and fast - change or program new recipes on the y.
TABLE OF CONTENTS
TO BE UPDATED
Manufacturer’s Introduction........................................................................................................................................2
Important Safety Instructions.................................................................................................................................. 3-4
Installation.......................................................................................................................................................................5
Stacking Units .................................................................................................................................................................6
RFHU Operating Instructions - Shelf Control ............................................................................................................7
Overview ............................................................................................................................................................................................. 7
Settings................................................................................................................................................................................................ 8
Preset Editing..................................................................................................................................................................................... 8
Label Editing ...................................................................................................................................................................................... 9
Language ............................................................................................................................................................................................ 9
Tools Menu.......................................................................................................................................................................................... 9
Access Menu .....................................................................................................................................................................................10
Help......................................................................................................................................................................................................10
Faults....................................................................................................................................................................................................11
Cleaning Guide .............................................................................................................................................................12
Temperature Check Procedure ..................................................................................................................................14
RFHU Specication.......................................................................................................................................................15
Wire Diagrams ..............................................................................................................................................................16

3
RFHU Operator’s Manual - Shelf Control
Throughout this manual, you will nd the following safety words and symbols that signify
important safety risks with regards to operating or maintaining the equipment.
Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
CAUTION
Indicates Important Information
Indicates electrical shock hazard which, if not avoided, could
result in death or serious injury and/or equipment damage.
Indicates hot surface which, if not avoided, could result in
minor or moderate injury.
IMPORTANT SAFETY INSTRUCTIONS
In addition to the warnings and cautions in this manual, use the following guidelines for
safe operation of the unit.
• Read all instructions before using equipment.
• For your safety, the equipment is furnished with a properly grounded cord connector. Do
not attempt to remove or disconnect the grounded connector.
• Install or locate the equipment only for its intended use as described in this manual.
• Do not use corrosive chemicals on this equipment.
• Do not operate this equipment if it has a damaged cord or plug, if it is not working
properly, or if it has been damaged or dropped.
• This equipment should be serviced by qualied personnel only. Contact the nearest
Duke authorized service facility for adjustment or repair.
• Do not block or cover any openings on the unit.
• Do not immerse cord or plug in water.
• Keep cord away from heated surfaces.
• Do not allow cord to hang over edge of table or counter.

RFHU Operator’s Manual - Shelf Control
4
The following warnings and cautions appear throughout this manual and should be
carefully observed.
• Turn the unit o, disconnect the power source and allow unit to cool down before
performing any service or maintenance on the unit.
• The procedures in this manual may include the use of chemical products. You must read
the Material Safety Data Sheets before using any of these products.
• The unit should be grounded according to local electrical codes to prevent the
possibility of electrical shock. It requires a grounded receptacle with dedicated electrical
lines, protected by fuses or circuit breaker of the proper rating, in accordance with all
applicable regulations.
• Disposal of the unit must be in accordance with local environmental codes and/or any
other applicable codes.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance
by a person responsible for their safety.
• Contains Transmitter Module FCC ID: 2AC7Z-ESP32WROVERB
• Contains Transmitter Module IC: 21098-ESPWROVERB
• This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions:
• 1. This device may not cause harmful interference, and
• 2. This device must accept any interference received, including interference that may
cause undesired operation.
• This equipment complies with radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with a minimum
separation distance of 20cm between the radiator (enclosed antenna) and your body.
• This device is granted for use in Mobile only congurations in which the antennas used
for this transmitter must be installed to provide a separation distance of at least 20cm
from all person and not be co-located with any other transmitters except in accordance
with FCC and Industry Canada multi-transmitter product procedures.
• Changes or modications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
IMPORTANT SAFETY INSTRUCTIONS

5
RFHU Operator’s Manual - Shelf Control
INSTALLATION
UNPACKING UNIT
Inspect the shipping carton and/or container,
carefully noting any exterior damage on the
delivery receipt; also note any damage not evident
on the outside of the shipping container (concealed
damage). Contact the carrier immediately and le a
damage claim with them. Save all packing materials
when ling a claim. Freight damage claims are the
responsibility of the purchaser and are not covered
by the warranty.
• Follow the instructions on the Carton Box for
unpacking the unit.
• Inspect unit for damage.
• Report any dents or breakage to source of
purchase immediately.
• Do not attempt to use unit if damaged.
• Remove all materials from unit interior.
• If unit has been stored in extremely cold area,
wait a few hours before connecting power.
INSTALLATION CODES AND STANDARDS
In the United States, the RFHU must be installed in
accordance with the following:
1. State and local codes.
2. National Electrical Code (ANSI/NFPA No. 70,
latest edition) available from the National Fire
Protection Association, Batterymarch Park,
Quincy, MA 02269.
3. Vapor Removal from Cooking Equipment,
(NFPA-96, latest edition) available from NFPA.
4. Sealed to the counter upon which the
equipment is placed per NSF/ANSI 4 standard.
In Canada, the RFHU must be installed in
accordance with the following:
1. Local codes.
2. Canadian Electrical Code (CSA C22.2 No. 3, latest
edition) available from the Canadian Standards
Association, 5060 Spectrum Way, Mississauga,
Ontario, Canada L4W 5N6.
UNIT PLACEMENT
• Do not install unit next to, below or above
source of heat such as oven or deep fat fryer.
• Install unit on level counter top surface.
• Outlet should be located so that plug is
accessible when the unit is in place.
• Do not install unit in the direct path of
air-conditioned airow.
The following minimum clearances must be
maintained between the warmer and any
combustible or non-combustible substance:
Proper airow around unit will cool the electrical
components. With restricted airow, the unit may
not operate properly and the life of the electrical
components may be reduced. A 2” clearance is
recommended at the control side for longer control
life expectancy.
Unit Clearance
Right Side 2”
Left Side 2”
Rear OPEN
Floor 0”

RFHU Operator’s Manual - Shelf Control
6
ELECTRICAL SHOCK HAZARD UNIT MUST BE SAFETY GROUNDED, EARTHED.
DO NOT MODIFY, DEFEAT ELECTRICAL CONNECTIONS OR ALTER PLUG.
ELECTRICAL CONNECTIONS
BEFORE CONNECTING THE UNIT TO THE POWER SOURCE, VERIFY THAT THE
VOLTAGE AND PHASE OF THE POWER SOURCE ARE IDENTICAL TO THE VOLTAGE AND
PHASE INFORMATION ON THE DATA LABEL.
EARTHING INSTRUCTIONS
THE UNIT MUST BE GROUNDED. Grounding reduces risk of electric shock by providing an escape wire for
the electric current if an electrical short occurs. This unit is equipped with a cord having a grounding wire
with a grounding plug. The plug must be plugged into a receptacle that is properly installed and grounded.
Consult a qualied electrician or service agent if grounding instructions are not completely understood, or
if doubt exists as to whether the unit is properly grounded.
DO NOT USE AN EXTENSION CORD. If the product power cord is too short, have a qualied electrician
install a three-slot receptacle (or the country specic receptacle for International Units). This unit should be
plugged into a dedicated circuit with the electrical rating as provided on the product data plate.
STACKING UNITS
The RFHU is designed to allow limited stacking capabilities. This section outlines how to safely stack the
holding unit.
TIP HAZARD! DO NOT STACK RFHU42 OR
RFHU34 UNITS. DO NOT EXCEED 2 HOLDING UNITS
PER STACK. DO NOT PLACE HOLDING UNIT STACKS ON
SURFACES THAT MAY EASILY TIP OVER.
Place bottom unit into position then stack the next unit
on top. The top of the lower holding unit rests inside of
the base of the upper unit.
Step 1 Remove the base pan from the unit that will be on top. The pan
is held in place by four screws on the bottom of the unit.
Step 2

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RFHU Operator’s Manual - Shelf Control
RFHU OPERATING INSTRUCTIONS  SHELF CONTROL
OVERVIEW
When the unit is rst powered the boot screen will
appear for 2 to 3 seconds. This will display the Duke
Logo along with the rmware version number.
After the control has booted the runtime screen will
load.
Dierent information is found on the runtime screen
of the control. Details below.
When the unit rst boots the status will indicate
“preheating”. When the setpoint temperature is
reached this will change to a“ready” status. This
indicates that the required preset temperature has
now been reached by the unit. Both the preset
temperature and the actual temperature are
displayed on the runtime screen.
The control will contain 2 two dierent holding
zones – each with two temperature sensors. When
the navigation buttons ( & ) are pressed – either
left or right the temperature zone will change. There
will be 4 in total. For example pressing will move
to the next zone as seen in the below.
The zone has changed from the “TOP” of “Shelf1”
to the “BOTTOM” of “Shelf1”. When navigating to
a dierent zone the actual temperature, preset
temperature and status indicator will change to
reect the dierent temperatures (actual and
preset) and status for the selected zone.

RFHU Operator’s Manual - Shelf Control
8
RFHU OPERATING INSTRUCTIONS SHELF CONTROL Continued
Instead of using navigation buttons the“grid”
option in the lower right-hand corner of the screen
can be used to see all zones with their preset
temperature. For example when the “grid icon” ( )
is pressed the following will appear.
When a zone is selected the screen will change to
the selected zone without the need for the left and
right navigation buttons.
The control has a number of conguration icons.
Selecting the “COG”icon ( ) in the top right-hand
corner will load the Settings menu.
SETTINGS
A number of settings are available on the control
to allow customization of labels and preset values.
These settings are:
PRESET EDITING
Selecting “Presets”will load the Preset editor.
The preset value for each zone can be modied by
selecting the and buttons. The temperature will
be able to be modied from a minimum of 140F to a
maximum of 280F. Select to save the changes.
The navigation buttons - and can be used to
navigate each of the four zones.

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RFHU Operator’s Manual - Shelf Control
RFHU OPERATING INSTRUCTIONS SHELF CONTROL Continued
LABEL EDITING
Selecting the “Label Editor” within the Settings
menu will allow the Zone Name and both the
temperature Sensor 1 and Sensor 2 label names to
be modied which are displayed on the runtime
screen.
After selecting the “Label Editor” the following
screen will appear.
The naming of each of the zones and sensors can be
modied by selecting the appropriate selection.
For example “selecting”the “Name” box will display
the following screen.
The “Zone”label consists of six characters that
can be upper case letters, lower case letters or
numbers. Selecting will save the entry. Both
temperature sensor displays can be changed in
the following way, for example “TOP”/”BOTTOM”or
“LEFT”/”RIGHT”. When modied the runtime screen
and grid display will both be updated with the new
labels. For example:
This is reserved for future use and will allow users to
change the language display on all screens.
LANGUAGE
TOOLS MENU
The user can also be “locked” from editing the unit’s
preset value if desired. This can be achieved by
entering the “Settings menu”followed by the“Tools”
menu.
The following menu options appear under the
“Tools” menu.

RFHU Operator’s Manual - Shelf Control
10
RFHU OPERATING INSTRUCTIONS SHELF CONTROL Continued
The tools menu will also contain the “TEMP” option
which allows the user to switch between Celsius and
Fahrenheit display.
The default is Fahrenheit (F).
When modied all temperatures that appear on the
runtime screen (actual and preset), grid display or
the preset editor will be displayed is the selected
temperature mode.
To lock or unlock the modication of the preset
value, rst enter the admin menu by selecting the
“Admin” and entering the “0654” pin code when
prompted..
Follow this by selecting the “Access” option and then
use the slider to either lock or unlock the preset
editing -
The temperature calibration option is also accessible
from the “Admin” menu to edit the oset value for
each zone on the unit. When this menu option is
selected the current grid display will be displayed
with each of the individual temperature zones.
Select a zone to edit the temperature calibration
oset for the selected zone.
The temperature oset can be modied. The user
will be allowed to edit the temperature calibration
oset value from -20 F to 20F.
Use the and to increase or decrease the tem-
perature calibration oset value.
When done select to save the oset value else
select the button to exit without saving.
The Help option is reserved for future use.
HELP

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RFHU Operator’s Manual - Shelf Control
RFHU OPERATING INSTRUCTIONS SHELF CONTROL Continued
FAULTS
On occasion faults may be detected and displayed
such as; SENSOR FAULT, LOW TEMP FAULT and HIGH
TEMP FAULT. When a fault occurs, the specic fault
will be displayed on the runtime screen. For exam-
ple, in the below a“LOW TEMP FAULT” has occurred
in the “ROW 1 Top” temperature zone.
A fault indicator ( )also exists on top of the“grid”
icon in the lower right hand corner. See below.
The below runtime screen displays a sensor fault on
“Row 1 Top”.
The below runtime screen displays a High
Temperature fault on “Row 1 Top”.
When a fault occurs in a dierent temperature
zone but not on the active zone that is currently
displayed the icon will again be displayed on the
grid icon in the lower right hand corner even if the
current temperature zone does not have a fault.
When clicking on the grid icon the display of all
temperature zones with their setpoint temperature
will be displayed. Any zone that that contains a fault
will have an error icon displayed.

RFHU Operator’s Manual - Shelf Control
12
Electrical shock hazard. Do not wash with water jet or hose.
DO NOT USE CAUSTIC CLEANERS, ACIDS, AMMONIA PRODUCTS OR ABRASIVE CLEANERS
OR ABRASIVE CLOTHS. THESE CAN DAMAGE THE STAINLESS STEEL AND PLASTIC
SURFACES.
Bottom and sides of warmer wells are very hot and cool slowly.
DAILY CLEANING
• Stainless Steel Surfaces
To prevent discoloration or rust on stainless steel
several important steps need to be taken. Stainless
steel contains 70-80% iron which will rust. It
also contains 12-30% chromium which forms an
invisible passive film over the steel surface which
acts as a shield against corrosion. As long as the
protective layer is intact, the metal will not corrode.
If the film is broken or contaminated, outside
elements can begin to breakdown the steel and
begin to form rust or discoloration.
Proper cleaning of stainless steel requires soft
cloths or plastic scouring pads.
Never use steel pads, wire brushes or scrapers.
Cleaning solutions need to be alkaline based or
non-chloride cleaners. Any cleaner containing
chlorides will damage the protective film of the
stainless steel. Chlorides are also commonly found
in hard water, salts and household and industrial
cleaners. If cleaners containing chlorides are used,
be sure to rinse repeatedly and dry thoroughly
upon completion.
Routine cleaning of stainless steel can be done with
soap and water. Extreme stains or grease should
be cleaned with a non-abrasive cleaner and plastic
scrub pad. It is always good to rub with the grain
of the steel. There are also stainless steel cleaners
available which can restore and preserve the finish
of the steels protective layer.
Early signs of stainless steel breakdown can
consist of small pits and cracks. If this has begun,
clean thoroughly and start to apply stainless steel
cleaners in an attempt to restore the passivity of
steel.
NEVER USE AN ACID
BASED CLEANING SOLUTION! MANY
FOOD PRODUCTS HAVE AN ACIDIC
CONTENT WHICH CAN DETERIORATE THE
FINISH. BE SURE TO CLEAN ALL FOOD
PRODUCTS FROM ANY STAINLESS STEEL
SURFACE. COMMON ITEMS INCLUDE,
TOMATOES, PEPPERS AND OTHER
VEGETABLES.
THE POWER MUST BE
TURNED OFF AND DISCONNECTED
AT ALL TIMES WHEN PERFORMING
MAINTENANCE OR REPAIR FUNCTIONS.
NEVER USE A HIGHPRESSURE
WATER WASH FOR THIS CLEANING
PROCEDURE AS WATER CAN DAMAGE
ELECTRICAL COMPONENTS
ELECTRICAL SHOCK HAZARD.
DO NOT WASH WITH WATER JET OR
HOSE.
RECOMMENDED SUPPLIES
Cleaning Towels
Non-Scratch Scrub Pad
KAY™ Degreaser
KAY® SINK SANITIZER, KAYQUAT™ Sanitizer, or
compatible sanitizer
CLEANING GUIDE

13
RFHU Operator’s Manual - Shelf Control
PROCEDURE
1. Turn unit o, unplug, and allow to cool for 30 minutes.
2. Remove all holding pans. Wash, rinse, and sanitize at the 3 compartment sink.
3. Allow to air dry.
4. Spray a cleaning towel, or non-scratch scrub pad when necessary, with soapy solution or KAY™
Degreaser. Fully clean upper heat sink surfaces by hand, as well as lower heat sink surfaces
Take care when reaching in the cabinet. Sheet metal edges could be sharp.
NOTE: Never spray cleaning solution directly onto the cabinet.
5. If daily cleaning is performed routinely, deeper, more aggressive, cleaning methods can be avoided.
Over longer periods of time, fried food product can accumulate and bake on to the upper heat sink
surfaces of the compartments.
6. Use a sanitizer-soaked towel and wipe out all compartments on the holding unit. Wipe top
compartments rst, and then lower compartments.
IMPORTANT: Use clean, sanitizer-soaked towels (Important: towels must be wrung out so that they are
damp and not dripping, dripping towels may harm the unit.)
DAILY INSPECTION CHECKLIST:
Make sure that:
• Unit is free of any visible food soils.
• Unit is free of grease or soils in holding compartment.
• Exterior of unit is free of smudges or soil.
• Holding pans are free of any food soil residue.
• Pans are free of damage such as cracks.
CLEANING GUIDE  continued

RFHU Operator’s Manual - Shelf Control
14
TEMPERATURE CHECK PROCEDURE
1. A digital temperature meter that has been
calibrated must be used to get an accurate
temperature reading. Use a thermocouple
surface temperature probe to measure
temperatures.
2. No pans, or product containers, should be in
wells during the pre-heat and temperature
check. Pre-heat the warmer for 30 minutes
before taking any temperature readings. Do not
take readings unless the cavity has been empty
for 30 minutes. This will allow the temperature
to stabilize and will prevent false readings.
3. The warmer cavity should be cleaned and
empty before the temperature is checked.
Avoid any air drafts that might ow through the
cavity.
4. Temperature readings should be taken when
standing on the front side of the unit with on/
o switch. Locate the surface temperature
probe on the bottom of the rst cavity. Position
the probe half way back on the heat sink and
centered left to right as shown.
5. All temperature controls exhibit a swing in
temperature as the control cycles on and o
while regulating to the set point. The correct
calibration temperature is the average of several
readings taken over a period of 20 minutes after
the warmer has been pre-heated. The average
temperature should be no greater than ± 10°F
(± 6°C) from the set point.
6. The allowable range of well temperatures which
can be programmed on the RFHU is 140°F-280°F
(60°C-137.8°C).
7. If the calibration temperature is greater than
+/- 10F (6C) from the set point, adjust the
temperature calibration oset value under
the Tools menu. The oset value should be
set as the dierence between the calibration
temperature and the set point.
8. Repeat for all heat sinks.
Center Probe Front to Back

15
RFHU Operator’s Manual - Shelf Control
RFHU SPECIFICATIONS
18.25
14.15
19.97
ELECTRICAL SPECIFICATION/CORD
RATING (TOP AND BOTTOM HEAT)
DIMENSIONS
40.00
14.15
19.56
RFHU 23R
RFHU 25S
Model
208/240 V - 60Hz 220/240V - 50/60Hz Height Width Depth
(body only)
Amps NEMA Amps IEC in. cm in. cm in. cm
RFHU 23R 8.7/9.9 L6-15P 9.1/9.9 60309 14.1 35.8 18.3 44.4 20.0 50.8
RFHU 25S 14.4/16.6 L6-20P 15.3/16.6 60309 14.1 35.8 40.0 101.6 19.6 49.8

Duke Manufacturing Co.
2305 N. Broadway
St. Louis, MO 63102
Phone: [phone]
Toll Free: 1-800-735-3853
Fax: [phone] www.dukemfg.com
WIRE DIAGRAMS
IOC-G
2. 8" D is pl ay
IOC-G
2. 8" D is pl ay
Line Cord
BLK
WHT
22 1 -61 322 1 -61 3
22 1 -61 322 1 -61 3
Bottom Row
22 1 -61 322 1 -61 3 22 1 -61 322 1 -61 3
POWE R
SW.
22 1 -61 322 1 -61 3
22 1 -61 322 1 -61 3
ELC0504 Rev J 2/15/2021 Model: RFHU-25S & RFHU-23R
BLK ( G N D)
RED (5V)
WHT (CA N_L)
BLU (CAN_H)
BLK ( G N D)
WHT (CA N_L)
BLU (CAN_H) BLK
WHT
BRN
BLU
L1
N
L1
N
N
L1
Top Heat
Bottom Heat
To p
Bottom
To p
Bottom
To p Bottom
To p
Bottom
Top Row
Top Heat
Bottom Heat
Wire Diagram – Model: RFHU-25S
PCB-1
Top Row
PCB-2
Bottom Row
Line Cord
BLK
WHT
Bottom Row
POWE R
SW.
22 1 -61 322 1 -61 3
BLK ( G N D)
RED (5V)
WHT ( CA N_L)
BLU (CAN_H)
BLK ( G N D)
WHT (CA N_L)
BLU (CAN_H) BLK
WHT
BRN
BLU
L1
N
L1
N
L1
To p
Bottom
To p
Bottom
To p Bottom
To p
Bottom
Top
Row
Top Heat
Bottom Heat
Wire Diagram – Model: RFHU-23R
PCB-1
Top Row
PCB-2
Bottom Row
22 1 -61 222 1 -61 2
22 1 -61 222 1 -61 2
22 1 -61 322 1 -61 3
N
Top Heat
Bottom Heat
22 1 -61 222 1 -61 2
22 1 -61 222 1 -61 2
T1 T2
T2 T1
T1 T2
T2 T1
N
N
N
N
3-Wid e E l em ent : 450W @ 208V, 2.16A 600W @ 240V = 2.50A 2-Wid e E l em ent :
300W @ 208V, 1.44A 399W @ 240V = 1.67A
3-Wi d e E l em e nt :
450W @ 208V, 2.16A 600W @ 240V = 2.50A
Line CordLine Cord
R ea rFront
Line Cord
PCB-1
Top Row PCB-2
Bottom Row
Bottom Row Top H ea t W ir es Bottom Row Bottom Heat W ir es
Top Row
Top H ea t
W ir es
Top Row
Bottom Heat
W ir es
R ea rFront
Line Cord
PCB-1
Top Row PCB-2
Bottom Row
Bottom Row Top H ea t W ir es Bottom Row Bottom Heat W ir es
Top Row
Top H ea t
W ir es
Top Row
Bottom Heat
W ir es
IOC-G
2. 8" D is pl ay
IOC-G
2. 8" D is pl ay
Line CordLine Cord
R ea r Front
Line Cord
PCB-1
Top Row
PCB-2
Bottom Row
Bottom Row
Bottom Heat Wir es
Top Row Top H ea t W ir es
Top Row Bottom Heat W ir es
Bottom Row Top H ea t W ir es
Power Sw itc h
R ea r Front
Line Cord
PCB-1
Top Row
PCB-2
Bottom Row
Bottom Row
Bottom Heat Wir es
Top Row Top H ea t W ir es
Top Row Bottom Heat W ir es
Bottom Row Top H ea t W ir es
Power Sw itc h