Blodgett KTT-DS User Manual
SC-G Series
GAS ATMOSPHERIC STEAMER ON CABINET BASE
INSTALLATION - OPERATION - MAINTENANCE
BLODGETT OVEN COMPANY
www.blodgett.com
44 Lakeside Avenue, Burlington, Vermont 05401 USA
Manufacture Service Questions: 866-518-3977
PART NUMBER 170177 REV B (04/11)
THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE. READ, UNDERSTAND
AND FOLLOW THE INSTRUCTIONS AND WARNINGS CONTAINED IN THIS MANUAL.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN
THE VICINITY OF THIS OR ANY OTHER APPLIANCE.
POST IN A PROMINENT LOCATION
INSTRUCTIONS TO BE FOLLOWED IN THE EVENT USER SMELLS GAS. THIS INFORMATION
SHALL BE OBTAINED BY CONSULTING YOUR LOCAL GAS SUPPLIER. AS A MINIMUM,
TURN OFF THE GAS AND CALL YOUR GAS COMPANY AND YOUR AUTHORIZED SERVICE
AGENT. EVACUATE ALL PERSONNEL FROM THE AREA.
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.
NOTIFY CARRIER OF DAMAGE AT ONCE
IT IS THE RESPONSIBILITY OF THE CONSIGNEE TO INSPECT THE CONTAINER UPON
RECEIPT OF SAME AND TO DETERMINE THE POSSIBILITY OF ANY DAMAGE, INCLUDING
CONCEALED DAMAGE. WE SUGGEST THAT IF YOU ARE SUSPICIOUS OF DAMAGE TO
MAKE A NOTATION ON THE DELIVERY RECEIPT. IT WILL BE THE RESPONSIBILITY OF THE
CONSIGNEE TO FILE A CLAIM WITH THE CARRIER. WE RECOMMEND THAT YOU DO SO
AT ONCE.
IMPORTANT - READ FIRST - IMPORTANT
WARNING: THE UNIT MUST BE INSTALLED BY PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY AND
PLUMBING. IMPROPER INSTALLATION CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO
THE EQUIPMENT. THE UNIT MUST BE INSTALLED IN ACCORDANCE WITH APPLICABLE CODES.
WARNING: BEFORE REMOVING ANY PARTITION OR PANEL, TURN OFF THE ELECTRICAL POWER AND ALLOW
THE FAN TO STOP ROTATING. BEFORE WORKING ON ANY ELECTRICAL COMPONENT DISCONNECT
THE POWER SOURCE FROM THE UNIT.
NOTICE: DO NOT INSTALL THE UNIT IN ANY WAY WHICH WILL BLOCK THE RIGHT SIDE VENTS, OR WITHIN 12
INCHES OF A HEAT SOURCE SUCH AS A BRAISING PAN, DEEP FRYER, CHAR BROILER OR KETTLE.
NOTICE: LEVEL THE UNIT FRONT TO BACK, OR PITCH IT SLIGHTLY TO THE REAR, TO AVOID DRAINAGE
PROBLEMS.
CAUTION: MAKING ANY ELECTRICAL OR MECHANICAL CHANGE IN THE UNIT WITHOUT PRIOR APPROVAL
FROM FOOD SERVICE ENGINEERING WILL VOID ALL WARRANTIES.
WARNING: TO AVOID DAMAGE OR INJURY, FOLLOW THE WIRING DIAGRAM EXACTLY WHEN CONNECTING A
UNIT.
CAUTION: DO NOT USE PLASTIC PIPE. DRAIN MUST BE RATED FOR BOILING WATER.
WARNING: DO NOT CONNECT THE DRAIN DIRECTLY TO A BUILDING DRAIN.
WARNING: BLOCKING THE STEAM GENERATOR OR CAVITY DRAIN SCREEN MAY BE HAZARDOUS.
IMPORTANT: IMPROPER DRAIN CONNECTION WILL VOID WARRANTY.
WARNING: WHEN YOU OPEN THE DOOR, STAY AWAY FROM STEAM COMING OUT OF THE UNIT. STEAM CAN
CAUSE BURNS.
WARNING: ALL POTENTIAL USERS OF THE EQUIPMENT SHOULD BE TRAINED IN SAFE AND CORRECT
OPERATING PROCEDURES.
WARNING: NO ATTEMPT SHOULD BE MADE TO OPERATE THIS EQUIPMENT DURING A POWER FAILURE.
WARNING: BEFORE CLEANING THE OUTSIDE OF THE STEAMER, DISCONNECT THE ELECTRIC POWER SUPPLY.
KEEP WATER AND CLEANING SOLUTIONS OUT OF CONTROLS AND ELECTRICAL COMPONENTS.
NEVER HOSE OR STEAM CLEAN ANY PART OF THE UNIT.
WARNING: ALLOW COOKING CHAMBERS TO COOL BEFORE CLEANING.
WARNING: CAREFULLY READ THE WARNINGS AND FOLLOW THE DIRECTIONS ON THE LABEL OF EACH
CLEANING AGENT. USE SAFETY GLASSES AND RUBBER GLOVES AS RECOMMENDED BY DELIMING
AGENT MANUFACTURER.
WARNING: DO NOT MIX DE-LIMING AGENTS (ACID) AND DE-GREASERS (ALKALI) IN THE STEAM GENERATOR
OR ON THE COOKING CHAMBER WALLS.
WARNING: DO NOT PUT HANDS OR TOOLS INTO THE COOKING CHAMBER UNTIL THE FAN HAS STOPPED
TURNING.
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IMPORTANT - READ FIRST - IMPORTANT
WARNING: DO NOT OPERATE THE UNIT UNLESS THE REMOVABLE RIGHT SIDE PANELS HAVE BEEN RETURNED
TO THEIR PROPER LOCATIONS.
NOTICE: DO NOT USE A CLEANING OR DE-LIMING AGENT THAT CONTAINS ANY SULFAMIC ACID OR ANY
CHLORIDE, INCLUDING HYDROCHLORIC ACID. IF THE CHLORIDE CONTENT OF ANY PRODUCT IS
UNCLEAR, CONSULT THE MANUFACTURER.
NOTICE: USE NO DE-GREASER THAT CONTAINS POTASSIUM HYDROXIDE OR SODIUM HYDROXIDE OR THAT
IS ALKALINE.
WARNING: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY THE MANUFACTURER OR
THEIR AUTHORIZED DISTRIBUTOR VOIDS ALL WARRANTIES AND CAN CAUSE BODILY INJURY TO
THE OPERATOR AND DAMAGE THE EQUIPMENT. SERVICE PERFORMED BY OTHER THAN FACTORYAUTHORIZED PERSONNEL WILL VOID ALL WARRANTIES.
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Table of Contents
Important Operator Warnings ....................................................page 1-2
References.................................................................................... page 3
Equipment Description.................................................................. page 4
Water Quality and Treatment .......................................................... page 5
Inspection and Unpacking ............................................................ page 6
Installation .................................................................................. page 7-8
Initial Start-Up............................................................................... page 9
Operation ................................................................................ page 10-11
Cleaning.................................................................................. page 12-13
Maintenance................................................................................. page 14
Troubleshooting............................................................................ page 15
Electrical Schematic .................................................................. page 22
Service Log ................................................................................. page 23
References
ZEP MANUFACTURING CO.
1310-T Seaboard Industrial Blvd.
Atlanta, Georgia 30318
NATIONAL FIRE PROTECTION ASSOCIATION
60 Batterymarch Park
Quincy, Massachusetts 02269
NFPA/70 The National Electrical Code
NFPA/54 Installation of Gas Appliances & Piping
NSF INTERNATIONAL
789 N. Dixboro Rd.
P.O. Box 130140
Ann Arbor, Michigan 48113
CSA INTERNATIONAL
8501 Ease Pleasant Valley Road
Cleveland, Ohio 44131
AMERICAN NATIONAL STANDARDS INSTITUTE
1403 Broadway, New York, New York 10018
Z21.30 Installation of Gas Appliances & Piping
Z223.1-1984 National Fuel Gas Code
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Equipment Description
WARNING
BEFORE REMOVING ANY PARTITION OR
PANEL, TURN OFF THE ELECTRICAL POWER
AND LET THE FAN STOP ROTATING.
BEFORE WORKING ON ANY ELECTRICAL
COMPONENT, DISCONNECT THE POWER
SOURCE FROM THE UNIT.
WARNING
THE UNIT MUST BE INSTALLED BY
PERSONNEL WHO ARE QUALIFIED TO WORK
WITH GAS, ELECTRICITY AND PLUMBING.
IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE TO
THE EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH
APPLICABLE CODES.
Your Atmospheric Convection Steamer is designed to give years of service. It has two
stainless steel cavities (cooking chambers) which are served by twin, independent
atmospheric steam generators which are gas-heated. A powerful blower circulates the
steam in each cavity, to increase heating efficiency.
Each cavity holds up to three steam table pans (12”x 20” x 2½”). A 16 gauge stainless
steel cabinet encloses the cavities, the steam generators and the control compartment
that houses electrical components. Door hinges are reversible (the doors may be set to
open from the left or right). Operating Controls are on the front panel.
Steamers are equipped with fully electronic controls and a button-activated, preprogrammed CLEAN cycle. These units are readily identified by a unique control panel.
The drain system includes a spray condenser, which reduces condensate temperature
and helps keep steam from escaping through the drain.
BURNER FIRING RATES
INPUT RATES, BTU/HOUR
Individual Steam Generator 45,000 45,000
Total, Both Cavities 90,000 90,000
NATURAL GAS
at 3.7” W.C.
LP GAS
at 10.5” W.C.
The steamer has two independent cavities, each
with its own base-mounted steam generator.
Voltage: 108-126 VAC Single Phase 50/60 Hz
Current: 2.5 AMPs ± 10%
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Treated
Water
Water Quality & Treatment
It is essential to supply the steam generator with water that will not form scale. Even
though the steam generator/boiler is engineered to minimize scale formation, scale
development depends on the hardness of your water and the number of hours you
operate the equipment each day.
Most water supplies contain minerals which form scale. It is this scale which could lead
to an early component failure.
Gas
Connection
REAR VIEW
Untreated
Water
Drain
Your local water utility can tell you about the minerals in your water. The water going
to the steam generator should have between 10 and 30 parts per million (ppm) total
dissolved solids (TDS) and should have a pH (acidity rating) of 7.0 to 9.0. Please follow
these simple precautions:
1. The best way to prevent scale is to use a Water Treatment System which has been
specifically designed for steamers and combination ovens. Do not rely on unproven
water treatment systems sold for scale prevention and removal. They may not be
specifically designed to work with steamers and combination ovens.
2. A well-maintained water treatment system and a regular cartridge replacement
schedule is essential.
3. Using a Water Treatment System will provide longer steam generator/boiler life,
higher steam capacity, and reduce maintenance requirements. To avoid mineral
build up in the steam generator, blow down the generator after every 5 hours.
4. If you notice a slowdown in steam production or an increase in deliming, have the
steamer checked for scale build-up. This could be an indication that the water
treatment cartridges need replacing. Heavy scale reduces the unit’s ability to boil
water, and can even cause component failure.
MINIMIZE SCALE PROBLEMS BY INSTALLING AND MAINTAINING A WATER TREATMENT
SYSTEM AND BY DELIMING THE STEAMER REGULARLY.
The steamer features two separate water inlets — one for the steam generator/boiler
(treated water), the other for the spray condenser (untreated water). The second intake
will reduce treatment requirements resulting in significant savings.
The dual water connections are side by side on the rear of the unit. When seen from the
back of the unit, the treated water intake is on the left.
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Inspection & Unpacking
CAUTION
SHIPPING STRAPS ARE UNDER TENSION
AND CAN SNAP BACK WHEN CUT.
CAUTION
THIS UNIT WEIGHS 550 POUNDS. GET HELP
AS NEEDED AND USE MATERIAL HANDLING
EQUIPMENT TO MOVE IT.
Your steamer will be delivered completely assembled in a heavy shipping carton and
attached to a skid. On receipt, inspect the carton carefully for exterior damage.
Carefully cut the straps around the carton and detach the sides of the carton from the
skid. Be careful to avoid personal injury. Strap edges may be very sharp, particularly
where cut.
Write down the model number, serial number and installation date. Space for these
entries is provided in the Service Log at the back of this manual. Keep the manual near
the equipment for reference and update as needed.
When installing, use material handling equipment to lift the unit straight up from the skid.
Check packing materials for any loose parts.
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Installation
WARNING
THE UNIT MUST BE INSTALLED BY
PERSONNEL WHO ARE QUALIFIED TO WORK
WITH GAS, ELECTRICITY AND PLUMBING.
IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE
TO THE EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH
APPLICABLE CODES. THE UNIT MUST BE
INSTALLED BY A LICENSED PLUMBER OR
GAS FITTER WHEN INSTALLED WITHIN THE
COMMONWEALTH OF MASSACHUSETTS.
CAUTION
DO NOT INSTALL THE UNIT WITH THE RIGHT
SIDE VENTS BLOCKED OR WITHIN 12 INCHES
OF A HEAT SOURCE (LIKE A BRAISING PAN,
DEEP FRYER, CHAR BROILER, OR KETTLE).
TO AVOID DRAIN PROBLEMS, LEVEL THE
UNIT FRONT TO BACK, OR PITCH IT
SLIGHTLY TO THE REAR.
UNIT
REAR
UNIT
FRONT
The steamer is suitable for installation on or near both combustible and
noncombustible surfaces. Minimum installation clearances are:
Right Side 2 inches
Left Side 0 inches
Rear 6 inches
However, for easy service at least 12 inches clearance is required for the right side of
the unit, and it may not be installed within 12 inches of a heat source, as stated in the
Caution above.
The unit must be installed in a well-ventilated room with an adequate air supply. The
steamer must be installed beneath a ventilation hood, since gas combustion products
exit the appliance.
Any item which might obstruct or restrict the flow of air for combustion and ventilation
must be removed. Do not obstruct the flue cover or any front, side, rear, or top vents
after installation.
The area directly around the appliance must be cleared of all combustible material.
The installation must conform with local codes or, in the absence of local codes, with
the National Fuel Gas Code, ANSI Z223.1, latest edition, including the following:
The unit and its individual shutoff valve must be disconnected from the gas supply
system during any pressure testing of that system at test pressures in excess of 1/2
PSI (3.45 kPa). It must be isolated from the gas supply piping system by closing its
individual manual shutoff valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 PSI (3.45 kPa).
Flue
Control
Box
Electrical
Conduit
The knockout hole is sized for a one inch
conduit fitting. Pass the wire up the back
through this knockout hole to the front. Make
the connections from the front.
1. Electrical Supply Connection
Provide 115 VAC, 60 HZ, 1 PH, 15 AMP service. Bring conduit in through open
frame on the under-side of cabinet. Local codes and/or the National Electrical
Code should be observed in accordance with ANSI/NFPA 70-1987 (or latest
edition). AN ELECTRICAL GROUND IS REQUIRED. The electrical schematic is
located in the service compartment and in this manual. Maximum load is 2
AMPs. In Canada, provide electrical service in accordance with the Canadian
Electrical Code, CSA C22.1 Part 1 and/or local codes.
2. Gas Supply Connection
Connection to the gas supply can be completed with 1/2” NPT pipe or approved
equivalent. Although the immediate connection to the appliance is “ NPT, gas
supply piping must be large enough to provide 90,000 BTU/hr. Supply pressure
must be at least 4.5” W.C. (maximum 14” W.C.) for natural gas or 12” W.C.
(maximum 14” W.C.) for LP gas. In Canada, the installation must conform to the
Canadian Gas Code, CAN 1-B149, Installation Codes for Gas Burning Appliances
and Equipment and/or local codes. After the unit has been connected to the gas
supply, all gas joints must be checked for leaks.
No flame should be used when checking for leaks. A thick soap solution or other
suitable leak detector should be used.
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