Hobart C44AW Installation Manual

C-LINE
A & AW DISHWASHERS

MODEL R-L OPERATION L-R OPERATION

C44A ML-38898 ML-38899

ML-104047 ML-104050

C44AW ML-103946 ML-103947

ML-104082 ML-104083
C54A ML-104199 ML-104198
C64A ML-103908 ML-103909
C88A ML-110042 ML-110041

CRS66A ML-38947 ML-38948

ML-104052 ML-104055
CRS66AW ML-103958 ML-103959

ML-104086 ML-104087
CRS76A ML-104202 ML-104201
CRS86A ML-103910 ML-103911
CRS110A ML-110044 ML-110043

CCS66A ML-104321 ML-104320
CCS66AW ML-104323 ML-104322
CCS76A ML-104325 ML-104324
CCS86A ML-104327 ML-104326
CCS110A ML-110046 ML-110045

CPW80A ML-38955 ML-38956

ML-104058 ML-104061
CPW80AW ML-103964 ML-103967

ML-104090 ML-104091
CPW90A ML-104205 ML-104204
CPW100A ML-103912 ML-103913
CPW124A ML-110048 ML-110047

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 17791 Rev. O (Feb. 2006)

IMPORTANT FOR YOUR SAFETY

THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL
GAS EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND
ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL.

POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE
EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED
FROM THE LOCAL GAS SUPPLIER.

IMPORTANT

IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN
UNITS AT MAIN SHUTOFF VALVE AND CONTACT THE
LOCAL GAS COMPANY OR GAS SUPPLIER FOR SERVICE.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY
OTHER APPLIANCE.

FOR YOUR SAFETY

READ BEFORE OPERATING

DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN
UNDER WATER. IMMEDIATELY CALL A QUALIFIED
SERVICE TECHNICIAN TO INSPECT THE APPLIANCE AND
TO REPLACE ANY PART OF THE CONTROL SYSTEM AND
ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.

IN THE EVENT OF A POWER FAILURE, DO NOT ATTEMPT
TO OPERATE THIS DEVICE.

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TABLE OF CONTENTS

GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Standard Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Water Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Plumbing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Drain Connection(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Fill & Final Rinse Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Steam Connection (When Equipped) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Gas Connection (When Equipped) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Venting Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Pant-Leg Vent Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Rate of Exhaust Flow Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electrical Connections – Dishwasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Electrical Connections – Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Optional Equipment Control Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Curtain Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Filling the Dishwasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Starting the Gas Heat Dishwasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Dishwashing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

DOs and DON'Ts for Your New Hobart Warewasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Vent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

– 3 –

Installation, Operation and Care Of

C-LINE A & AW DISHWASHERS

SAVE THESE INSTRUCTIONS

GENERAL

C-Line A or AW Dishwashers are fully automatic, rack-type washers that convey the rack from
one end of the machine to the other, exposing the ware to progressive wash/rinse action. It has a
stainless steel tank and chamber with a welded stainless steel angle frame, stainless steel legs and
stainless steel adjustable feet. Front inspection door(s) provide access to the interior of the
wash/rinse chambers. CRS and CPW models also have a prewash inspection door. The C44A/AW,
CRS66A/AW, CCS66A/AW, CPW80A/AW, C54A, CRS76A, CCS76A, CPW90A, C64A, CRS86A,
CCS86A and CPW100A machines are capable of either high- or low-temperature operation. The
C88A family is not available for low-temperature operation. Machines are available with steam, gas
or electric heat. A Prewash Unit or Recirculating Scrapper are also available.

Model C44A

Right to Left Operation

– 4 –

STANDARD EQUIPMENT
Controls (Fig. 1)

Fig. 1

The controls are mounted on top of the chamber. There are three operational control switches housed
in the control box: Power (ON-OFF); Motor (ON-OFF); and Timer (MANUAL-AUTO). A pilot circuit
transformer provides a reduced voltage of 115 volts for the machine controls. When equipped for gas
heat, a step-down transformer provides a reduced voltage of 24 volts for the igniter board(s) and
valves.

Motor and Pump Units

The wash/rinse pump(s) are centrifugal-type cast stainless steel with a stainless steel impeller. The
2 HP motor is available in the following voltages:

Volts Hz Phase Volts Hz Phase

208-240 60 1 380-415 50 3
208-240 60 3 380 60 3
200-240 50 3 480 60 3

600 60 3

1

The conveyor drive motor is a

/6 HP gear motor with the same voltage as the wash/rinse pump motor.

A 1 HP prewash pump motor is standard on CRS and CCS models. A 2 HP prewash pump motor is
standard on CPW models. Voltage and construction are the same as the wash/rinse pump motor.

All motors have built-in thermal overload protection with manual reset.

Vacuum Breakers

The final rinse and fill lines contain an atmospheric vacuum breaker that prevents any reverse flow of
water from the dishwasher into the potable water supply.

Heater Protection

A float-activated switch located in the wash tank (and rinse tank if included) automatically turns off the
heat supply, if the water level is too low. Once the water returns to the proper level, the heating circuit
becomes operational if heat is demanded.

An overtemperature protector is also provided for electric and gas tank heat, and for built-in booster
if provided. If overheating should occur, the heat supply will be turned off. Turn the Power switch OFF
and contact your local Hobart service office.

– 5 –

Thermometers

Dial thermometers for wash and final rinse are indicated in °F and °C on the faceplate.

Door Interlocks

Door interlock switches will prevent machine operation while an inspection door is open. If a door is
opened while the machine is operating, the pumps and conveyor will automatically turn off. After the
door is closed, the machine must be restarted by pushing the Motor switch ON.

Wash and Rinse Arms

Upper and lower prewash, wash and final rinse arms are removable.

RS Unit and CS Unit – (CRS66A, CRS66AW, CRS76A, CRS86A, CRS110A, CCS66A,
CCS66AW, CCS76A, CCS86A and CCS110A)

The 22" Recirculating Scrapper is a power prewash unit which uses overflow wash water, hence, no
fill valve is required.

PW Unit – (CPW80A, CPW80AW, CPW90A, CPW100A and CPW124A)

The 36" prewash unit is a large power prewash unit which uses overflow wash water, hence, no fill valve
is required.

Auto Fill

Close door(s) and push the Power switch ON. After a 5-second delay, the machine fills automatically.

Auto Timer

The Auto Timer switch is located on the left side of the control box. Designed to save electrical power,
it is adjusted to shut off pump and drive motors a set amount of time after the last rack exits the
dishwasher. To restart, slide a rack into the machine or push the Motor switch ON. To change the time
setting, contact your local Hobart-authorized service office.

Common Drain

A stainless steel common drain tube connects the dishwasher and prewash drains together, thus
requiring only one drain connection at installation.

Front Panel

Stainless steel front panel conceals pumps and plumbing.

Common Water Connection

A single water connection for fill and final rinse is standard. This requires a minimum incoming water
temperature of 180°F for high-temperature machines (140°F for low-temperature machines) for
machines not equipped with booster heater. A minimum incoming water temperature of 110°F is
required for machines equipped with an optional 30
incoming water temperature of 140°F is required for machines equipped with an optional 15

KW Hobart booster heater, and a minimum

KW Hobart

booster heater.

– 6 –

OPTIONAL EQUIPMENT
Blower Dryer — Dishes are dried by forced, heated air (3-phase machines only). The exhaust

requirement at the vent stack of the blower dryer is 1400 CFM.
Conveyor Dwell — The optional conveyor dwell switch (Conveyor ON-OFF) is housed in the control

box and shuts the conveyor drive motor off.
Condenser — Removes excess moisture from exhaust air before returning air to dishroom (only on

machines without booster).
Single-Point Electrical Connection — Option for electric heat machines. Requires one electrical

service connection for non-booster machines. Available for 3-phase machines only.
Extended Hood — Provides a dampered vent and acts as an effective splash shield for the discharge

end of the wash chamber. The exhaust requirement at the entrance end is 200 CFM maximum; at the
discharge end, the exhaust requirement is 400 CFM maximum.

Side Loader — Allows machine to be placed in a corner or used where area at the load end is limited.
Available without hood.

Vent Hood — (Sides are not as long as the extended hood.) A dampered exhaust opening controls
steam and water splash to work area. The exhaust requirement at the entrance end is 200 CFM
maximum; at the discharge end, the exhaust requirement is 400 CFM maximum.

Table Limit Switch — Shuts the machine off when the unload table is full of racks.
CS/RS-22 Lower Prewash Arm — Optional on the CRS and CCS models.
DDU38 Unloader — Moves racks in a 90-degree arc from the unload end of the dishwasher to a dish

table; this allows the machine to be placed in a corner or to be used where area at the unload end is
limited.

Separate Water Connection — Individual Fill (140°F) and Final Rinse (180°F min.) water connections
are available on high-temperature, non-booster machines only.

Booster Heater — Interwired and interplumbed 30

KW or 15 KW booster heater.

– 7 –

INSTALLATION

UNPACKING

Immediately after unpacking the dishwasher, check it for possible shipping damage. If the machine is
found to be damaged, save the packaging material and contact the carrier within 15 days of delivery.

Prior to installation, verify that the electrical service agrees with the specifications on the machine data
plate, which is located on the right-hand side of the control box for non-booster machines and on the
left-hand side of the control box for booster equipped machines.

The electrical diagram is located on the inner surface of the control box cover.
After unpacking the dishwasher, remove the items shipped uninstalled (overflow tube, literature

envelope, splash shields, curtains and chamber hole plug kit) and instructions from inside
the dishwasher. Set the dishwasher in its proper location. Adjust the height and level by turning the
adjustable feet.

NOTE: The dishwasher must be positioned and leveled before making plumbing connections.
NOTE: This machine must be operated with an automatic detergent feeder and, if applicable, an

automatic chemical sanitizer feeder, including a visual means to verify that detergents and sanitizers
are delivered or a visual or audible alarm to signal if detergents and sanitizers are not available for
delivery to the respective washing and sanitizing systems. See instructions for electrical and plumbing
connections located in this manual and in the feeder equipment manual. Chemical feeders are supplied
by others.

INSTALLATION CODES

Installation must be in accordance with state and local codes, or in the absence of local codes, with the
National Fuel Gas Code, ANSIZ223.1 (latest edition), if applicable, and the National Electrical Code
ANSI/NFPA 70 (latest edition). In Canada, the installation standards are: CAN/CGA B149.1,
CAN/CGA B149.2 and CSA C22.2 No. 1 (latest editions).

– 8 –

ASSEMBLY

Dish tables should be fitted into the dishwasher (Fig. 2). Use mastic between table and lip of tank to

1

prevent leakage. Rack track height should be from

/4 to 5/16" (Fig. 2) above the tank lip. Dish tables

should be sloped so that any water carried from the dishwasher will drain back into it.

Fig. 2

Remove the strainer basket and strainer pans from the wash chamber (Fig. 3).
Place the overflow tube in the retainer (Fig. 4).

Fig. 3 Fig. 4

– 9 –