Hobart PW10, PW20ER, PW20, PW10ER Installation Manual
PW10/PW20 PreP Washer
Lave-BaTTerIe PW10/PW20
LavavajILLas PW10 y PW20
MODEL
MODÈLE
MODELO
PW10 ML-130290
PW10ER ML-130291
PW20 ML-130292
PW20ER ML-130293
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
www.hobartcorp.com
F-47575 (March 2016)
© HOBART 2015
– 2 –
TABLE OF CONTENTS
GENERAL ....................................................................4
INSTALLATION ................................................................4
UNPACKING ..................................................................5
Unpacking From Pallet .......................................................6
Removing ER Section if Necessary ..............................................6
INSTALLATION CODES ........................................................10
LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PLUMBING CONNECTIONS ....................................................15
Water Requirements ........................................................15
Water Supply Connection ....................................................15
Plumbing Connections .......................................................17
Drain ....................................................................17
Venting Requirements (PW10 / PW20) ..........................................17
Rate of Exhaust Flow Calculations .............................................17
Canopy Size and Location ....................................................18
Rate of Exhaust Flow Calculations .............................................18
Chemical Feeder Installations .................................................18
Detergent Feeder (Optional By Others) ..........................................19
Rinse Agent Feeder (Optional By Others) ........................................19
Delime Feeder (standard) on Advansys models only (PW10eR/ PW20eR) ..............19
Vent Exit (PW10 / PW20) .....................................................19
Vent Fan Control (Standard); Power Vent Fan (Optional) PW10/PW20 .................19
ELECTRICAL CONNECTION(S) ..................................................19
Rotation of Pump Motor(s) ....................................................20
EQUIPMENT CONNECTIONS ...................................................21
Vent Fan Control ...........................................................21
Detergent Feeder ...........................................................21
Rinse Aid Feeder ...........................................................21
OPERATION .................................................................22
CONTROLS ..................................................................22
Operating the PW Prep Washer ...............................................22
PROGRAMMING ..............................................................23
Manager Mode Programing ...................................................23
Programming Instructions ....................................................26
Menu Display Prompts .......................................................26
General Operating Instructions ................................................27
CLEANING ..................................................................27
For Models PW10eR and PW20eR .............................................30
MAINTENANCE ..............................................................32
WASH AND RINSE ARMS ...................................................32
DELIMING ................................................................32
TROUBLESHOOTING .........................................................34
– 3 –
Installation, Operation and Care Of
Model PW10/PW20 Prep Washer
SAVE THESE INSTRUCTIONS
GENERAL
The PW10 and PW20 Prep Washer is the answer to volume utensil washing
problems in your kitchen, bakery or supermarket operation. The PW10/20 occupies
a minimum amount of oor space (under 48" x 43" with door open) and does not
require separate dish tables. The upper portion of the door raises, while the lower
portion swings out to provide a drain platform. The rack can then be pulled out for
easy loading and unloading.
The key pad lets you select a 2-, 4- or 6-minute cycle; each wash cycle is followed
by a dwell. After the dwell is a 10 (PW10, PW10eR, PW20) or 12 (PW20eR) second
rinse. Advansys models include a 1½ to 2½ minute condensing time following the
rinse cycle. The upper and lower wash arms provide thorough cleaning. Upper and
lower rinse arms provide a sanitizing rinse at the end of each cycle.
The PW10/20 is only available with electric tank heat and electric booster is standard.
A spray hose and nozzle is provided on the side of the machine.
UNPACKING
Features include: sloping strainer system, pumped drain, automatic ll, and rack
with inserts for trays. The at rack can accommodate a 140-quart Hobart mixer bowl.
INSTALLATION
Immediately after unpacking the PW10/PW20, check for possible shipping damage.
If the machine is found to be damaged, save the packaging material and contact
the carrier within 5 business days after delivery.
Prior to installation, test the electrical service to ensure that it agrees with the
specications on the data plate located on the bottom right of the upper door.
– 4 –
Unpacking From Pallet
Carefully unpack the machine from the pallet.
1. Remove the shipping brackets from the machine/pallet.
Fig. 1
2. Remove the bottom pallet boards. This can be done using a pallet jack.
Proper care and personal equipment should be used when when handling
wood with exposed nails.
Fig. 2 Fig. 3
3. Screw out the feet.
4. With machine resting on the feet, slide pallet out from underneath the machine.
NOTE: On the PW20 machine the pallet sides might need to be removed to
make this easier.
– 5 –
Removing ER Section if Necessary
Disconnect the electrical power to the machine and follow
lockout / tagout procedures. There may be multiple circuits. Be sure all circuits
are disconnected.
NOTE: One ER unit is shown in the following steps. If removing both from
PW20 Advansys, repeat steps 2 through 10 for each side.
1. Disconnect incoming water hose at supply connection.
Fig. 4
NOTE: Drain out any excess water in hose.
2. Remove upper wash and rinse arms.
Fig. 5
3. Remove bafes. (located under wash and rinse arms).
a. Remove bolt (1).
b. Side bafe to side to free from holding bracket (2) from opposite side of bafe.
c. Remove (Qty 4) nuts (3) that are holding ER assembly from inside wash area.
– 6 –
2. Remove shroud.
3. Remove door lock assembly cover.
Fig. 6
Fig. 7
Fig. 8
– 7 –
4. Remove motor junction box cover.
Fig. 9
5. Label motor wires for reconnecting later.
6. Disconnect motor wires.
Fig. 10
– 8 –
7. Disconnect water hoses connected at ER assembly.
Fig. 11
8. Remove (Qty 13) mounting nuts around ER assembly.
Fig. 12 Fig. 13
– 9 –
9. Lift ER assembly off of machine.
10. Reverse procedure to install.
NOTE: If ER units were removed to get thru a door opening, when re-installing,
remove, clean surface, and install new foam tape to the housing to ensure a
proper seal.
INSTALLATION CODES
Installation must be in accordance with state and local codes, and the National
Electrical Code ANSI/NFPA70 (latest edition). In Canada, the installation code is
CSA 22.1 (latest edition).
LOCATION
Set the machine in place after the nal oor covering is installed. Make sure the
machine is level before making any plumbing connections. Allow at least 3" at the
rear and 18" at the sides of the machine for service access. Allow 16" in front of the
machine for the door to lower and sufcient additional space for the operator to work.
Fig. 14
– 10 –
OPTIONAL
PW10
– 11 –
76-7/16”
PW10eR
– 12 –
OPTIONAL
PW20
– 13 –
76-5/8”
PW20eR
– 14 –
PLUMBING CONNECTION(S)
applicable portions of the National Electrical Code (NFPA No. 70, CSA 22.1
latest edition) and/or other local electrical codes.
Water Requirements
Proper water quality can improve ware washing performance by reducing spotting,
enhancing effectiveness of labor and extending equipment life. Water conditions
vary from one location to another. The recommended proper water treatment for
effective and efcient use of this equipment will also vary depending on the local
water conditions. Ask your municipal water supplier for details about your local water
conditions prior to installation.
Recommended water hardness is 3 grains of hardness per gallon or less. Higher
hardness may cause excessive formation of lime scale. Water hardness above 3
grains per gallon requires water treatment. Water treatment has been shown to
reduce costs associated with machine cleaning, reduce deliming of the dishwasher,
and reduce detergent usage in the dishwasher. Chlorides must not exceed 50 ppm.
require an iron lter. High chloride levels in the water supply can cause
pitting and may require a chloride removal system. Contact your local water
treatment professional for proper water treatment.
Electrical and grounding connections must comply with
High iron levels in the water supply can cause staining and may
Sediment may require a particulate lter. Dissolved solids may require water treatment
such as a water softener, reverse osmosis system, etc. Contact your local water
treatment professional for proper water treatment.
If an inspection of the dishwasher or booster heater reveals lime buildup after the
equipment has been in service, water treatment is recommended. If a water softener
is already in place, ensure there is a sufcient level of salt. Contact your local Hobart
Service ofce for specic recommendations.
Water Supply Connection
The water supply line should be a ¾” male garden hose (supplied by others).
The plumber connecting this machine is responsible for making certain that water
lines are THOROUGHLY FLUSHED OUT BEFORE connecting to the dishwasher.
This "ush-out" is necessary to remove all foreign matter, such as chips (resulting
from cutting or threading of pipes) pipe joint compound from the lines; or, if soldered
ttings are used, bits of solder or cuttings from the tubing. Debris, if not removed,
may lodge in the dishwasher's plumbing components and render them inoperative.
Manual valves or solenoid valves fouled by foreign matter and any expenses resulting
from this fouling are NOT the responsibility of the manufacturer and associated
repair costs are not covered under warranty.
– 15 –
Water supply requirements are as follows:
WATER SUPPLY REQUIREMENTS
Model Supply Temperature
PW10 Hot Water 110°F Minimum
PW10eR Cold Water 55°F Minimum, 80°F Maximum
Hot Water 110°F Minimum
PW20 Hot Water 110°F Minimum
PW20eR Cold Water 55°F Minimum, 80°F Maximum
Hot Water 110°F Minimum
PW10eR and PW20eR models require both a cold water supply connection and a
hot water supply connection.
On PW10eR and PW20eR installations, the cold water supply must
not exceed 80°F (27°C) for proper operation. Optimal results are obtained
when cold water supply temperature is below 65°F (18°C). For best results,
it may be necessary to use ½” pipe for cold water pipe size and minimize
the distance between the dishwasher and the entrance into the building.
Pipe insulation will also improve results.
If cold water supply temperature is consistently above 80°F (27°C) or if excessive
water vapor or steam is entering the room after the condensing cycle is complete,
contact Hobart Service to increase condensing time.
Required owing water pressure to the dishmachine is 15-65 PSIG. If pressures
higher than 65 PSIG are present, a pressure regulating valve must be installed in
the water line to the dishmachine (by others). If owing pressure is less than 15
psi, improper machine operation may result. All PW models are equipped with a
pumped rinse system; therefore, a water pressure gauge is not required and is not
supplied with the machine.
The water pressure regulator must have a relief bypass. Failure to
use the proper type of pressure regulator may result in damage to the unit.
A manual shutoff valve (not supplied) should be installed upstream of the ll hose
to accommodate servicing the machine.
It is recommended that a line strainer (not supplied) be installed in the supply line
between the manual shutoff valve (not supplied) and the connection point on the
machine. Make plumbing connections with ½” minimum copper piping OD (¾”
recommended), with a ¾” male garden hose tting (not supplied). See installation
diagrams, pages 11-14.
– 16 –
Plumbing Connections
Plumbing connections must comply with applicable sanitary,
safety, and plumbing codes.
Drain
A drain hose, 7⁄8" inside diameter and 6' long, is provided. This should be securely
plumbed into a drain. Use care not to kink hose. See installation diagrams, pages
11-14. Drain must have a minimum ow capacity of 18 gallons per minute for PW10/
PW10eR and 26 gallons per minute for PW20/PW20eR.
Venting Requirements (PW10 / PW20)
Type I or type II canopy hoods are recommended. Hoods must be installed according
to the manufacturer's instructions. Make-up air must be provided so that the exhaust
ow rate results in a negative building pressure in the room where the unit is located
(more exhaust air than outside air). Factory-built hoods not tested to UL standard
710 and custom-built hoods must comply with the following specications: Stainless
steel should have a minimum thickness of 0.037 in. (0.94 mm) [No. 20 Gauge] or
copper sheet weighing at least 24 ounces per square foot (7 Kg/m2); the hood
must be secured in place by noncombustible supports and must meet the RATE of
EXHAUST FLOW CALCULATIONS.
Make sure the installation meets the local code for your area.
Rate of Exhaust Flow Calculations (FIG. 14)
Based on the 2015 International Mechanical Code.
Fig. 15
– 17 –
Canopy Size and Location
The inside lower edge of canopy-type type I and II commercial hoods shall overhang
or extend a horizontal distance of not less than 6 inches (152 mm) beyond the edge
of the top horizontal surface of the appliance on all open sides. The vertical distance
between the front lower lip of the hood and such surface shall not exceed 4 feet
(1219 mm) with a minimum of 1 foot (305 mm).
18” min overhang of the front opening.
The RATE of air ow required for a vent hood is a minimum of 100 CFM per linear
foot of hood length.
Rate of Exhaust Flow Calculations
Based on the 2015 International Mechanical Code.
The minimum net airow for Type II hoods used for dishwashing appliances shall
be 100 cfm per linear foot of hood length. The net quantity of exhaust air shall be
calculated by subtracting any airow supplied directly to a hood cavity form the total
exhaust ow rate of a hood.
Models PW10eR and PW20eR do not require a Type II vent hood. According to
507.3 of the 2015 IMC, Type II hoods are not required where the heat and moisture
loads is incorporated in the HVAC system design. See Table A for heat dissipation
or heat gain to space.
Model Voltage
PW10 208V 13,600 6,000
PW10 240V / 480V 16,800 7,300
PW10eR 208V 16,200 10,000
PW10eR 240V / 480V 20,100 12,300
PW20 208V 17,100 7,500
PW20 240V / 480V 20,400 8,900
PW20eR 208V 20,400 12,500
PW20eR 240V / 480V 24,300 14,800
Chemical Feeder Installations
This machine must be operated with an automatic detergent feeder, including a
visual means to verify that detergents are delivered or a visual or audible alarm to
signal if detergents are not available for delivery to the washing system. Chemical
feeders are supplied by others. For electrical connection, refer to Equipment
Connections, page 21.
Table A
HEAT DISSIPATION
Latent Heat
(BTU/HR)
Sensible Heat
(BTU/HR)
– 18 –
Detergent Feeder (Optional By Others)
If installing a detergent feeder (by others), remove cap to expose 7/8” diameter
hole at rear of machine.
Rinse Agent Feeder (Optional By Others)
If a rinse agent feeder (by others) is being installed, remove the 1/8" NPT pipe
plug(s) to access the tapped hole in the rinse tee on the right side of the machine
(PW10/PW10eR) and on the back of the machine (PW20/PW20eR). There are 2
rinse tees for the PW20/PR20eR machines.
Delime Feeder (standard) on Advansys models only (PW10eR/ PW20eR)
A delime feeder with tubing and standpipe is provided to automatically dispense
delime agent when needed.
Vent Exit (PW10 / PW20)
A vent exit (4-9/16 " x 17-3/8") is provided in the top of the machine to allow for
expansion of air. It must not be directly connected to an external vent.
Vent Fan Control (Standard); Power Vent Fan (Optional) PW10/PW20
The Vent Fan Control provides switching for a vent fan (by others). The vent hood
comes on when the PW10/20 is on and goes off when the PW10/20 is off. The
Power Vent Fan option exhausts moist air from the chamber after the rinse cycle is
nished. The Power Vent fan may be selected to operate for 40, 60 or 80 seconds.
The Power Vent Fan kit (eld installed only) extends upward 12 ¼” above the vent
exit (13 5/16” above the top of the wash chamber) and terminates in a round duct
connection for a 101/4" O.D. duct.
Install power vent fan kit using a maximum 60 ft of 10” diameter straight duct; or, 50
ft straight and two (2) 90°elbows, or equivalent. Distances greater than the stated
maximum lengths may reduce venting efciency.
ELECTRICAL CONNECTION(S)
applicable portions of the National Electrical Code (NFPA No. 70, latest edition)
and/or other local electrical codes.
lockout / tagout procedures. There may be multiple circuits. Be sure all circuits
are disconnected.
Electrical and grounding connections must comply with
Disconnect the electrical power to the machine and follow
– 19 –
Connect incoming power to the control box in accordance with the wiring diagram
located on the back of the front trim panel.
Volts/Hz/ph Rated Amps Circuit Size* Amps
208/240/60/3 47.6 / 53.0 60 / 70
480/60/3 28.6 35
Volts/Hz/ph Rated Amps Circuit Size* Amps
208/240/60/3 58.6 / 64.0 70 / 80
480/60/3 35.0 45
* Minimum Circuit Size / Maximum Protective Device (Amps) compiled in accordance
with the National Electrical Code (NFPA 70), latest edition.
** For supply connection, use wires suitable for at least 90°F or equivalent
Rotation of Pump Motor(s)
ELECTRICAL DATA
PW10 / PW10eR (Single Point Connection)
PW20 / PW20eR (Single Point Connection)
Before using the machine, check the pump motor rotation to be sure it is rotating
in the right direction.
PW10 / PW10eR
From the front of the machine, the motor should rotate clockwise. Looking from the
rear of the machine, the correct rotation is counterclockwise. Inspection is easiest
from the rear of the machine using a ashlight and mirror to check the motor fan in
the rear. Be aware that the mirror will reverse the perceived direction.
PW10 (Rear View)
Fig. 16
PW20 / PW20eR
Pump motor 1 – Looking from the right side of the machine, the correct rotation
is counterclockwise. Inspection is easiest from the right side using a ashlight to
check the motor fan on the rear of the motor.
Pump motor 2 – Looking from the left side of the machine, the correct rotation is
counterclockwise. Inspection is easiest from the left side using a ashlight to check
the motor fan on the rear of the motor.
– 20 –
If the pump motor(s) is/are rotating in the wrong direction, follow this procedure.
lockout / tagout procedures. There may be multiple circuits. Be sure all circuits
are disconnected.
Reverse any two of the three incoming line wires (not the ground wire). Reconnect
and recheck rotation of pump motor.
EQUIPMENT CONNECTIONS
applicable portions of the National Electrical Code (NFPA No. 70, latest edition)
and/or other local electrical codes.
lockout / tagout procedures. There may be multiple circuits. Be sure all circuits
are disconnected.
Vent Fan Control
PW20 (right view) PW20 (left view)
Fig. 17
Disconnect the electrical power to the machine and follow
Electrical and grounding connections must comply with
Disconnect the electrical power to the machine and follow
The vent fan control feature is standard on PW10 and PW20 models. This feature is
not available on PW10eR and PW20eR models. The vent fan control relay provides
switch contacts only and does not provide power to the vent fan motor. The rating
for a vent fan control relay connected to terminals VFC1 and VFC2 is 1.5 amps at
supply voltage. When the prepwasher is connected to the vent fan, the vent fan is
switched on when the prepwasher is on, and off when the prepwasher is off.
Detergent Feeder
The maximum rating for a detergent dispenser connected to DPS1 and DPS2 is 1.5
amps at line voltage. Refer to Chemical Feeder Installations, page 18.
Rinse Aid Feeder
The maximum rating for a rinse aid dispenser connected to RPS1 and RPS2 is 1.5
amps at line voltage. Refer to Chemical Feeder Installations, page 18.
– 21 –
CONTROLS
OPERATION
Fig. 18
Operating the PW Prep Washer
DO THIS DISPLAY SHOWS REMARKS
Press ON Model number Dishwasher performs self-
check. This takes 5 seconds.
Open door; slide rack
out to load ware. When
loading is complete, slide
rack into dishwasher.
Close door.
Press WASH (Green
Arrow).
FILL and ll icon lit; sump
temperature displayed when
machine is lling.
WARMING UP and warming
up icon are displayed when
booster is preheating on
models. This preheat could
take up to 25 minutes.
During ll, sump temperature
is displayed.
READY lit and sump
temperature displayed.
WASH and wash icon lit;
sump temperature displayed
during wash cycle.
Dishwasher lls with water.
If door is opened during ll
cycle, ll will stop. After door is
closed, the process continues
where it stopped.
When lled, machine will
maintain an idle state. Heat is
maintained in both sump and
booster.
Detergent contacts will be
activated during wash cycle.
Rinse contacts turned on
during rinse cycle for external
dispenser.
Machine initiates a wash and
rinse cycle.
RINSE and rinse icon lit;
rinse temperature displayed
during rinse cycle.
CONDENSE and condense
icon lit (Advansys models
only).
EXHAUST (base models with
Vent Fan Control only).
– 22 –
If door is opened during wash,
rinse, or drain cycle, cycle will
continue at point where door
was opened upon closing door.
If POWER is pressed during
cycle, machine will drain and
shut down
DO THIS DISPLAY SHOWS REMARKS
When cycle is complete,
reload machine for next
READY lit and sump
temperature displayed.
wash/rinse cycle; or, if
not in use, machine will
maintain idle mode.
At the end of the day,
press POWER.
DRAIN and SHUTDOWN IN
PROGRESS are displayed;
then the machine shuts
down.
SELECT WASH CYCLE and press START
CYCLE DESCRIPTION
2 A 2-minute wash cycle is followed by a 10 or
12-second fresh water rinse
(Advansys models have 99-190 second condensing
cycle).
4 A 4-minute wash cycle is followed by a 10 or
12-second fresh water rinse.
(Advansys models have 99-190 second condensing
cycle).
6 A 6-minute wash cycle is followed by a 10 or
12-second fresh water rinse.
(Advansys models have 99-190 second condensing
cycle).
All rinse cycles are followed by a 5 second pause.
Minimum Wash tank temperature is 150°F. Minimum Rinse temperature is 180°F.
Machine will drain and shut
down if the four hour idle shutdown time is reached.
When POWER key is pressed,
machine will drain and shut
down.
PROGRAMMING
Manager Mode Programing
The PW series prep washer’s microprocessor allows customization options for
machine operation. To activate or change these features, the programming edit
mode must be entered.
The manager programming mode requires a MANAGER CODE to be entered to
access the options listed in the PARAMETER MENU. The manager codes is 1001.
– 23 –
Manager Mode
PW PW
CHANGING PARAMETERS ENTER MANAGER SECURITY CODE: 1001
MANAGER MENU
➜
Programming Card
➜ ➜
ENTER SECURITY CODE
➜
(for 1)
➜
(for 0)
➜
(for 0)
➜
(for 1)
Edit Parameters
CHANGING PARAMETERS IS REQUIRED TO CHANGE ALL CODES BELOW
DELIME enables or disables the delime reminder alert.
OR
➜
until DELIME
➜
➜ ➜
until E XIT MENU
➜ ➜
to enable or disable
until E XIT
➜
➜
LOW TEMP ALARMS enables or disables alert indicating that the final rinse temperature has
been below the minimum temperature for a period of time.
OR
➜
until LOW TEMP A LARMS
➜
until E XIT MENU
➜ ➜
➜ ➜
to enable or disable
until E XIT
➜
➜
END CYCLE AUDIO ALERT enable or disable the unit creating an audio alert at the end of
each wash cycle.
OR
➜
until END CYCLE AUDIO ALERT
➜
until E XIT MENU
➜ ➜
➜ ➜
to enable or disable
until E XIT
➜
➜
TEMPERATURE UNITS allows the choice of Fahrenheit or Celsius.
until TEMPER ATURE UNITS
➜
➜ ➜
to choose Fahrenheit or Celsius
➜
OR ➜
until E XIT MENU
➜ ➜
until E XIT
➜
DIRTY WATER INDICATOR disables or gives a choice of how many cycles the machine will
run between dirty water alert and refresh cycles.
➜
or 60 cycles
until DIRTY WATER INDICATOR
➜
OR ➜
➜ ➜
until E XIT MENU
to Disable, 20 cycles, 40 cycles,
➜ ➜
until E XIT
➜
ENERGY SAVER MODE disables or gives choice of how many hours before the unit will
stay on before entering energy saving mode.
until ENERGY SAVING MODE
➜
➜
OR ➜
➜ ➜
until E XIT MENU
➜ ➜
to Disabled, 1 Hour, 2 Hours, or 3 Hours
until E XIT
➜
– 24 –
LANGUAGE allows the choice of English, French or Spanish language.
OR
until LANGUAGE
➜
until E XIT MENU
➜
➜ ➜
➜ ➜
to English, French or Spanish
until E XIT
➜
➜
WASH PROGRAM allows the customization of total run time.
until CYCLE TIME
➜
until E XIT MENU
➜ ➜
➜ ➜
until E XIT
EXIT MENU TO MAIN MANAGER MENU
until E XIT MENU
➜
➜
to choose cycle,
➜
➜
OR
➜
DELIME NOW allows for a single delime cycle to be run from the menu at anytime.
Note: this operation takes up to 1 hour 45 minutes depending on conditions. The machine will automatically
shut down at the end of delime cycle.
until DELIME NOW
➜
➜ ➜
to YES or NO
➜
(this will exit menu)
– 25 –
Programming Instructions
All customization is performed through the on-screen menu using the UP arrow,
MENU/DOWN arrow, and ENT keys located on the keypad on the lower right of
the machine (Fig. 4).
WASH
POWER
MENU/DOWN ARROW
Menu Display Prompts
The following prompts are used inside the menus:
• The UP arrow and MENU/DOWN arrow keys are used
to change parameter values and to navigate the menu.
• The ENT key is used to accept a value, to perform a
specic action, or to enter a submenu.
On PW10eR and PW20eR Advansys models, the door is locked
and must remain closed until the condensing cycle is completed.
During the condense cycle a countdown icon shows the remaining
cycle time. When the cycle is nished and the condense icon
disappears and the condensing cycle light turns off and the door
is unlocked. Open the door and pull out the rack to remove the
clean ware. Load soiled ware onto rack and push rack into the
machine. Close the door.
UP ARROW
ENTER
CYCLE
DISPLAY
Fig. 19
– 26 –
Recommended Condense Time
(Based on Incoming Water Temperature)
Incoming
Water Temp
Rinse
Time
PW10eR PW20eR
Condense
Time
Racks per
Hour
Rinse
Time
Condense
Time
°F (°C)
(Sec.)
(Sec.)
(2 min. cycle)
(Sec.)
(Sec.)
60 (16) – 64 (18) 10 99 13 12 98 13
64 (18) – 72 (22) 12 119 12 14 114 12
72 (22) – 80 (27) 14 139 11 16 131 11
80+ (27+) 16 158 10 18 147 10
For Advansys models only – If excessive amounts of steam or water vapor exit the
machine after condensing cycle light goes out and door is opened, incoming cold
water temperature may be too high.
Contact Hobart Service to adjust the rinse and condense times according to the
adjustment table. Increasing cycle time will increase water consumption and
decrease the racks per hour, but should reduce the water vapor entering the room.
General Operating Instructions
Keep the prep washer clean to provide best results. Do not allow foreign
objects to enter the unit, especially metallic contaminants.
Racks
per Hour
(2 min. cycle)
CLEANING
Do not wash aluminum utensils in the prep washer. The caustic detergent and high
water temperature will cause aluminum oxide formation (black). Copper utensils
may require polishing to remove oxide formation after exposure to utensil washer
cleaning for a period of time. Stainless steel utensils should clean quickly and easily
if the food soil is not baked on.
It may be necessary to scrub or prewash some hard-to-remove substances which
may not come clean in the prep washer with even a 6-minute washing. For stubborn
food soil, a plastic scraper, plastic abrasive pad, nylon bristle brush or sponge with
abrasive surface (Scotch Brite) may be used before washing in the prep washer.
Never use steel wool on ware to be loaded into the prep washer. Use only products
formulated to be safe on stainless steel. Do not use deliming agent on outside of
machine. Rinse items thoroughly after scrubbing to remove metallic debris.
Disconnect the electrical power to the machine and follow
lockout / tagout procedures. There may be multiple circuits. Be sure all circuits
are disconnected.
The prep washer must be thoroughly cleaned at the end of each working shift. Use
only product formulated to be safe on stainless steel. Never use steel wool to clean
machine surfaces.
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1. Spray down inside of machine with wand (Fig. 20).
Fig. 20
2. Press POWER. The machine will drain. (Fig. 7).
© HOBART 2008
Fig. 21
NOTE: Shutting off the machine causes a full automatic drain, which takes
about 3 minutes for a PW10 and about 3-1/2 minutes for a PW20.
3. Remove tray and racks.
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4. The wash and rinse arms are easily removed for cleaning. Make sure that
the wash and rinse arms rotate freely and are free of any obstructions. If any
obstructions are present, remove the wash and rinse arms. Clean the wash and
rinse arms under running water in a sink.
a. To remove upper rinse arm and wash arm (Fig. 22):
i. Unscrew the rinse arm by loosening the tabbed ring at top of rinse arm
ii. Remove both Rinse and Wash arms at the same time, being careful
not to drop these arms.
iii. Reverse the process to replace. Spin arms to make sure they spin
freely.
b. To remove lower rinse arm and wash arm (Fig.23).
i. Unscrew the rinse arm by loosening the tabbed ring at bottom of rinse
arm.
ii. Remove both Rinse and Wash arms at the same time, being careful
not to drop these arms.
iii. Reverse the process to replace. Spin arms to make sure they spin
freely.
Fig. 22 Fig. 23
5. Remove the strainer pans and strainer basket (Fig. 5), and empty into a waste
disposer or garbage container. Wash and rinse strainer pans and strainer basket
thoroughly. Do not bang strainers pan or basket on tables to remove food soil
– 29 –
6. Spray down sump (Fig. 24).
Fig. 24
7. Turn machine back on for 2 minutes to ll.
8. Turn off machine again to ush sump.
9. With a damp cloth, wipe the interior and exterior of the machine. DO NOT use
steel wool. Remove any remaining debris with a mild cleanser formulated for
stainless steel and a soft cloth or brush.
10. Carefully reinstall the strainer pans and strainer basket.
11. Use a soft, damp cloth or sponge and mild cleanser to clean the control keypad
and display. DO NOT use abrasive or harsh cleaners or scouring pads.
12. Leave the doors open to allow the interior to dry and air out.
Do not use spray hose to spray down exterior of machine.
For Models PW10eR and PW20eR
In addition to normal cleaning, the bafes, located on the upper chamber on the
inside of the machine, may need periodic cleaning. Note that the PW20eR will
have two sets of bafes.
Disconnect the electrical power to the machine and follow
lockout / tagout procedures. There may be multiple circuits. Be sure all circuits
are disconnected.
1. Loosen and remove the nut from the front bafe(s) and remove bafe(s) by
sliding the tab out of the retainer.
– 30 –
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