Frymaster YSCFC2424G Operators Manual
Flatbottom Gas Fryers
YSCFC24G Series
Service & Parts Manual
Models YSCFC 1824G, 2424G, and 24/24/15 Systems
with Built-In Filtration
Frymaster Dean, a member of the Commercial Food Equipment Service Association,
recommends using CFESA Certified Technicians.
PRINTED IN THE USA
service@frymaster.com
24-Hour Service Hotline
1-800-551-8633
www.frymaster.com
FEBRUARY 2009
*8196472*
Please read all sections of this manual and retain for future reference.
This product has been certified as commercial cooking equipment and MUST be installed by
professional personnel as specified. Installation, maintenance and repairs should be performed
by your FRYMASTER DEAN FACTORY AUTHORIZED SERVICE CENTER.
DANGER
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any
other cooking appliance.
DANGER
Instructions explaining procedures to be followed MUST be posted in a prominent location in
the event the operator detects a gas leak. This information can be obtained from the local gas
company or gas supplier.
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property
damage, injury or death. Read the installation, operating and maintenance instructions
thoroughly before installing or servicing this equipment.
DANGER
Safe and satisfactory operation of your equipment depends on proper installation. Installation
MUST conform with local codes, or in absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1; The Natural Gas Installation Code, CAN/CGA-B149.1; The Propane Installation
Code, CAN/CGA-B149.2; or The latest edition of the National Electric Code, N.F.P.A. 70.
NOTICE
IF, DURING THE WARRANTY PERIOD, THE CUSTOMER USES A PART FOR THIS ENODIS
EQUIPMENT OTHER THAN AN UNMODIFIED NEW OR RECYCLED PART PURCHASED
DIRECTLY FROM FRYMASTER DEAN, OR ANY OF ITS AUTHORIZED SERVIC E CENTERS,
AND/OR THE PART BEING USED IS MODIFIED FROM ITS ORIGINAL CONFIGURATION, THIS
WARRANTY WILL BE VOID. FURTHER, FRYMASTER DEAN AND ITS AFFILIAT ES WILL NOT BE
LIABLE FOR ANY CLAIMS, DAMAGES OR EXPENSES INCURRED BY THE CUSTOMER WHICH
ARISE DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, DUE TO THE INSTALLATION OF
ANY MODIFIED PART AND/OR PART RECEIVED FROM AN UNAUTHORIZED SERVICE CENTER.
DANGER
The crumb tray in fryers equipped with a filter system must be emptied into a fireproof container
at the end of frying operations each day. Some food particles can spontaneously combust if left
soaking in certain shortening material. Additional information can be obtained in the filtration
manual included with the system.
DANGER
The front ledge of the fryer is not a step. Do not stand on the fryer. Serious injury can result
from slips or contact with the hot oil.
WARNING
Drawings and photos used in this manual are intended to illustrate operational, cleaning and
technical procedures and may not conform to on-site management operational procedures.
WARNING
No structural material on the fryer should be altered or removed to accommodate placement of
the fryer under a hood. Questions? Call the Frymaster Dean Service Hotline at 1-800-551-8633.
This equipment is to be installed in compliance with the basic plumbing code of The Building
Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation
Manual of the Food and Drug Administration.
COMPUTERS (WHERE APPLICABLE)
FCC
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 interfere nce
received, including interference that may cause undesired operation. While this device is a verified Class
A device, it has been shown to meet the Class B limits.
CANADA
This digital apparatus does not exceed the Class A or B limits for radio noise emissions as set out by the
ICES-003 standard of the Canadian Department of Communications.
Cet appareil numerique n’emet pas de bruits radioelectriques depassany les limites de classe A et B
prescrites dans la norme NMB-003 edictee par le Ministre des Communcations du Canada.
DANGER
THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE
CANCER AND/OR BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.
Operation, installation, and servicing of this product could expose you to airborne particles of
glasswool or ceramic fibers, crystalline silica, and/or carbon monoxide. Inhalation of airborne
particles of glasswool or ceramic fibers is known to the State of California to cause cancer.
Inhalation of carbon monoxide is known to the State of California to cause birth defects or other
reproductive harm.
WARNING
Do not bang fry baskets or other utensils on the fryer’s joiner strip. The strip is present to seal
the joint between the fry vessels. Banging fry baskets on the strip to dislodge shortening will
distort the strip, adversely affecting its fit. It is designed for a tight fit and should only be
removed for cleaning.
YSCFC Series Flatbottom Gas Fryers
Service & Parts Manual
TABLE OF CONTENTS
PAGE #
1.
1.1
1.2
1.3
1.4
1.5
1.6
1.6.1
1.6.2
1.6.3
1.6.4
1.6.5
1.6.6
1.7
1.7.1
1.7.2
1.7.3
1.7.4
1.7.5
1.8
1.8.1
1.8.2
1.9
1.9.1
1.9.2
1.9.3
SERVICE PROCEDURES
Functional Description
Accessing Fryers for Servicing
Cleaning Gas Valve Vent Tube
Adjusting Burner Manifold Gas Pressure
Calibrating the Thermatron Temperature Controller
Replacing Fryer Components
Remove/Replace Temperature Probe or High-Limit Thermostat
Removing/Replacing Rocker Switches
Replacing the Gas Valve
Replacing the Direct Spark Ignitor
Removing/Replacing Blower Assembly or Air Prover Switch
Replacing the Frypot
Troubleshooting and Problem Isolation
Ignition Failures
Improper Burner Functioning
Improper Temperature Control
Filtration Problems
Leakage
Troubleshooting Guides
Main Burner Malfunctions
Indicator Lights
Wiring Diagrams
Wiring for Common Cabinet Flatbottom without Boil Out
24/24 Filter Wiring
18/24 Common Cabinet Transformer Box
1–1
1–1
1–3
1–4
1–4
1–5
1–6
1–6
1–8
1–9
1–9
1–10
1–11
1–15
1–16
1–17
1–19
1–19
1–21
1–22
1–22
1–23
1–24
1–24
1–25
1–26
YSCFC Series Flatbottom Gas Fryers
Service & Parts Manual
TABLE OF CONTENTS (cont.)
PAGE #
2.
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
PARTS LIST
Blower Assembly, Combustion Air
Burner Manifold and Related Components
Flue Caps, Top Caps, and Related Components
Cabinetry
Door Assemblies and Component Parts
Control Panels, Wireways, and Related Components
Oil Return and Suction Manifold
Filter Unit
Frypot, Drain, and Oil Return Components
Drain Valve and Components
Wiring Connectors, Pin Terminals, and Power Cords
Screws, Nuts, Fasteners
2–1
2–1
2–2
2–4
2–6
2–8
2–9
2–11
2–13
2–14
2–16
2–17
2–18
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1.1 Functional Description
YSCFC Series Flatbottom gas fryers contain a welded steel frypot (mild steel) with heat-transfer
ducting on the frypot bottom for efficient heating of oil without scorching. A draft inducer draws air
over the burners for combustion. Air movement directs the combustion products back and forth
across the frypot bottom by means of a set of baffles, transferring the heat evenly. Cold air is
prevented from entering the combustion chamber and cooling the oil during the coasting cycle.
Flames originate from orifices in three tubular burners positioned beneath the frypot. The diameter
of the orifices differs for Natural (CE:G20/G25) and LP (CE:G31) gas as indicated in the table
below.
NON-CE (Altitudes of 2000 feet or less)
MODEL
1824/24YSCFC 120
INPUT
(BTU)
GAS TYPE
NAT
LP
ORIFICE
[DRILL SIZE (MM)]
#34 (2.82)
#50 (1.78)
ORIFICE
PART #
810-2051
810-2317
QTY
3
3
An electromechanical gas valve regulates gas flow to the manifold. YSCFC Series Flatbottom gas
fryers are equipped with a 24-volt valve system and an electronic ignition system (direct spark
ignition).
Electronic Ignition Configuration
In units configured for electronic ignition, an ignition module connects to an ignitor assembly. The
ignition module performs three important functions: it provides an ignition spark, supplies voltage to
the gas valve, and proofs the burner flame.
The module contains a time delay circuit and a coil that activates the gas valve. The ignitor
assembly consists of a spark plug and a flame sensor element.
At start-up the ON/OFF switch is placed in the "ON" position, supplying 115 VAC or 230 VAC,
according to system configuration, to the Thermatron interface board. The voltage is stepped down
via transformer to 24 VAC before entering the ignition module. If resistance in the temperature
probe indicates the temperature in the frypot is below 150°F (66°C), the current flows through a melt
cycle circuit where a switch alternately closes for approximately 4 seconds and opens for
approximately 20 seconds. If the temperature is 150°F (66°C) or above, the current flows through a
heat circuit, bypassing the timer switch. In either case, current is supplied to the other leg of the heat
relay coil, which then closes an electronic switch in the 24 VAC circuit to provide current to the
ignition module.
Circuitry in the ignition module sends 24 VAC current to the gas valve via a normally closed highlimit switch and a drain safety switch. Simultaneously, the module causes the ignitor to spark for up
EQUIPMENT
PRESSURE
MBAR INCH W.C.
10
27.5
4
11
1-1
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
to 11 seconds to light the burner flame. A flame sensor verifies that the burner is lit by measuring
the flow of microamps through the flame. If the burner does not light (or is extinguished), current to
the ignition module is interrupted, preventing the main valve from opening, and the ignition module
"locks out" until the power switch is turned "OFF", then back "ON".
A temperature probe monitors the temperature in the frypot. When the programmed setpoint
temperature is reached, resistance in the probe causes the heat cycle circuitry in the controller to
interrupt current flow through the heat relay. This in turn interrupts the 24 VAC to the ignition
module, resulting in closure of the gas valve.
Control Options
YSCFC Series Flatbottom gas fryers are equipped with Thermatron temperature controller. The
fryer is turned on and off by means of a rocker switch and the temperature is set by adjusting a
potentiometer. The Thermatron board is located in the wireway box behind the control panel, or in a
component box inside the cabinet (depending on fryer configuration).
The Thermatron temperature controller operates by comparing resistance between the potentiometer
setting and the temperature probe. If the resistance values don’t match, an on-board relay energizes,
sending voltage to the gas valve that supplies fuel to the burners. When the resistance values are
equal, the on-board relay de-energizes, interrupting voltage to the gas valve, which stops the fuel
flow.
Depending on the system configuration and destination, 115VAC controller boards are used.
Line voltage enters the interface
board at J1. The temperature controls
(potentiometer) are connected to
terminals 7, 8 and 9. The sensor
probe circuit is connected to
terminals 10 and 11. The high-limit
and gas valve route through terminal
12. Terminals 5 and 6 are the melt-
BOIL
9
8
7
CCW
CT
CW
EXT POT
K1
3 AMP FUSE
F1
REMOVABLE
RELAY
COM
NC
NO
13
14
12
cycle disable circuit. The melt cycle
is enabled unless terminals 5 and 6
11
PROBE
10
5
MELT CYCLE DISABLE
6
P12 P13
12/24 VAC INPUT
J1
COM
115
230
are jumped out.
Thermatron Controller Board
1-2
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
Safety Components
All YSCFC Series Flatbottom gas fryers are equipped with a high-limit thermostat. In the event that
the fryer fails to properly control the oil temperature, the high-limit thermostat prevents the fryer
from overheating to flash point. The high-limit thermostat acts as a normally closed power switch
that opens when exposed to temperatures above 410°F [(210°C) - CE] to 450°F [(232°C) - Non-CE].
CE and non-CE high-limits are not interchangeable.
Frying systems with built-in filtration are equipped with drain microswitches that disable the fryer if
the drain valves are not completely closed. Opening a drain valve (i.e. filtering or draining the fryer)
automatically opens the reset switch circuit. The drain valve must be fully closed prior to resetting
the safety switch.
1.2 Accessing Fryers for Servicing
DANGER
Moving a fryer filled with cooking oil/shortening may cause spilling or splattering of
the hot liquid. Follow the draining instructions included with the fryer before
attempting to relocate a fryer for servicing.
NOTE: Perform the following only if the fryer cannot be serviced in its installed location. Some of
the following service procedures require the fryer to be connected to the gas and/or electrical supply.
1. Shut off the gas supply to the unit. Unplug the power cords. Remove any attached restraining
devices.
2. Disconnect the unit from the gas supply.
3. Relocate the fryer for service accessibility.
4. After servicing is complete, reconnect the unit to the gas supply, reattach restraining devices, and
plug in the electrical cords.
1-3
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1.3 Cleaning the Gas Valve Vent Tube (if applicable)
1. Set the fryer power switch and the gas valve to the "OFF" position.
2. Carefully unscrew the vent tube from the gas valve. NOTE: The vent tube may be straightened
for ease in removal.
3. Pass a piece of wire through the tube to remove any obstruction. Remove the wire and blow
through the tube to ensure it is clear.
4. Reinstall tube and bend so that the opening is pointing downward.
1.4 Adjusting Burner Manifold Gas Pressure
WARNING
This task should be performed by qualified service personnel only.
1. Ensure that the gas valve knob is in the
"OFF" position.
2. Remove the pressure tap plug from the
burner manifold.
3. Insert the fitting for a gas pressuremeasuring device into the pressure tap
hole.
Remove pressure tap from burner manifold to
check burner manifold pressure.
4. Place the gas valve in the "ON" position then place the fryer power switch in the "ON" position.
When the burner lights and continues to burn, note gas pressure reading for correct pressure in
accordance with the table on page 1-1.
1-4
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
5. To adjust burner gas pressure, remove the cap from the gas valve
regulator and adjust to correct p ressure (arrow shown at right).
6. Place the fryer power switch and the gas valve in the "OFF"
position. Remove the pressure-measuring device fitting from
the pressure tap hole and reinstall the pressure tap plug.
1.5 Calibrating the Thermatron Temperature
Controller
1. Ensure the fryer ON/OFF switch is in the "OFF" position. Fill the
frypot to the proper oil-level line with cooking oil/shortening. If
solid shortening is used, ensure that the shortening is properly
packed and melted in the frypot before proceeding.
2. Place the fryer ON/OFF switch in the "ON" position. Set the Thermatron dial to 325°F (162°C).
3. Allow the oil/shortening to stabilize at setpoint temperature. This is evident when the burners
have cycled on and off several times.
4. Insert a thermometer or pyrometer into the frypot within ½ inch (1.25 cm) of the probe tip.
Ensure the tip of the thermometer/pyrometer does not touch the bottom or sides of the frypot.
5. If the temperature on the thermometer is
higher or lower than 325°F (162°C), the
dial is out of calibration.
6. Calibrate the dial by first loosening two
setscrews in the dial (arrows). After loosening
both setscrews, slowly turn the dial to match
the temperature reading of the thermometer.
Tighten each setscrew, ensuring the dial does
not move on the shaft during tightening.
7. Allow burners to cycle on and off several
times, then recheck oil temperature as
described in step #5. If the Thermatron
dial temperature matches the thermometer
temperature, the controller is calibrated.
If not, repeat step #7.
8. After calibration is complete, place the fryer
power switch in the "OFF" position and
Loosen two setscrews in dial (arrows) to recalibrate
controller.
disconnect the fryer from the electrical supply.
Non-CE Electronic Ignition
Valve
1-5
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1.6 Replacing Fryer Components
1.6.1 Remove/Replace Temperature Probe or High-Limit Thermostat
1. Disconnect the fryer from the electrical supply.
2. Allow the frypot to cool for 10 minutes before draining. Drain cooking oil/shortening from the
frypot. Allow the frypot to cool completely before proceeding.
3. Remove the fryer door(s) for access to control panel screws. Lift door up, disengage rod from
lower door bracket, and then remove door. (Current production models have spring-loaded door
pins. Disengage bottom pin from the hinge, and then remove door.)
4. Remove the marine edge (where applicable) from the topcap.
5. Support the control panel and remove
screws securing the panel to the wireway
box. Remove the control panel.
6. On units with indicator lights on the control
panel, mark and unplug the wiring, and then
remove the control panel.
7. Remove screw securing probe/high-limit
access cover to wireway box. Remove
access cover and set aside.
NOTE:
Some systems have a wiring terminal
block mounted on the access cover. Mark
and disconnect the wiring to the terminal
block before removing access cover.
1-6
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
8. Remove the sensor bulb guard to access the
probe and high-limit (pictured above).
Current production systems have a sensor
bulb clamp that must be removed prior to
removing the probe or high-limit from the
frypot (pictured top right).
9. On the sensor bulb being removed, loosen
and unscrew completely the compression
nut, then the pass-through nut from the
frypot. Carefully remove the sensor bulb
from the frypot, being careful not to damage
the remaining sensor bulb.
Temperature probe. High-limit.
10. If removing the high-limit, remove the
screws securing it to the wireway box.
Mark and remove the wiring from the highlimit housing.
High-limit.
1-7
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
11. Reverse steps to install new temperature probe or high-limit. If reinstalling high-limit, ensure the
capillary tube is properly routed around the temperature probe before tightening (see photo, Step
#8). Reconnect wiring removed from defective high-limit.
IMPORTANT (High-Limit): When installing new high-limit, ensure the capillary tube and
bulb are positioned properly with the mounting hardware installed prior to tightening the
compression nut. Once tightened, the capillary tube cannot be repositioned.
IMPORTANT (Temperature Probe):
When installing new temperature probe,
ensure probe is positioned properly with the
mounting hardware installed (current
production systems), or 1/8" from frypot
bottom (older systems), prior
to tightening
the compression nut. Once tightened, the
In older fryers, ensure probe tip is 1/8" from
frypot bottom for proper temperature sensing.
Frypot Bottom
probe cannot be repositioned.
1.6.2 Removing/Replacing Rocker Switches
1. Disconnect the fryer from the electrical supply.
2. The switches are located on a control box inside the unit. Remove the screws securing the front
panel of the control box. Do not allow the panel to hang by the switch wiring harness wiring;
use some type of support.
3. Depress the retaining clips (see illustration below) and push the switch out of the slot. If there is
a switch-guard present, retain it for installation of the replacement switch.
When connecting wires to replacement
switch, pass the wires through the
switch guard (if applicable) before
connecting to switch.
Depress clips on each
end to remove switch
from control panel.
4. Remove wires one at a time from the switch being removed and connect to the replacement
switch until all wires are transferred.
1-8
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
5. Reverse the above steps for reassembly.
1.6.3 Replacing the Gas Valve
DANGER
Drain the frypot or remove drain valve handle to prevent accidental opening before
proceeding further.
1. Disconnect fryer from electrical and gas supplies.
2. Disconnect the wires from the gas valve terminal block, marking each wire to facilitate
reconnections.
3. Remove the high-limit thermostat wire from the gas valve coil (CE only).
4. Remove gas lines and pipe union collars from the gas valve and remove the valve.
5. Remove the pipefitting from the old gas valve and install on the replacement valve, using
Loctite PST567 or equivalent pipe thread sealant on threads. Do not apply sealant to the
first two pipe threads. Doing so will clog and damage the gas valve.
6. Reverse steps 1-5 to install the replacement gas valve.
1.6.4 Replacing Direct-Spark Ignitor Assembly (Units with Electronic Ignition Only)
1. Remove the burner shield from the
burner-box slots.
2. Disconnect sense wire and ignition
cable from the ignitor.
3. Remove the mounting screw from the
ignitor mounting-bracket and remove
the ignitor.
4. Reverse the procedure to replace the
ignitor assembly. Ensure the ignitor
is properly positioned in relation to
the center burner before tightening
mounting screw.
NOTE: The above procedure is
applicable to fryers equipped
Ensure ignitor is properly positioned (arrow) over
the center burner prior to tightening the mounting
screw.
with electronic ignition systems
only.
1-9
p
YSCFC SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1.6.5 Removing/Replacing Blower Assembly or Air Prover Switch
1. Remove back panel. On systems with builtin filtration, use care not to damage the oilreturn heat-tape wiring insulation when
removing backs (multi-batteried systems after
02/03 have two-piece back panels; remove
both to access blower assembly).
2. Remove blower assembly by removing four
screws (two screws securing the flue outlet to
the firebox, and two screws securing the
blower inlet housing to the firebox). Pull the
assembly out of the slot and lower to the side.
Do not remove the electrical connections at
this time.
3. Remove junction box cover and mark and
disconnect wiring to the switch. Unscrew
fitting connecting sampling tube to air prover
switch, being careful not to kink the tube.
Remove two screws from bracket that
attaches switch to junction box to remove
switch. Install new air prover switch with
bracket. Reattach sampling tube and wires
Multi-batteried systems after have upper and lower
back panels, which must be removed to access the
blower assembly. (fryer at left shown with upper
back
anel removed).
removed from old switch and replace
junction box cover.
4. If replacing blower, remove junction box
cover, mark and disconnect each wire, and
remove conduit fitting from junction box.
Reinstall conduit fitting on new blower
and reconnect wiring. Replace box cover.
5. Reverse steps 1 – 2 to reinstall blower
assembly.
After removing screws (arrows), remove blower
assembly from firebox by pulling outward.
1-10
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