IMPORTANTINFORMATION |
KEEPFOROPERATOR IMPORTANTINFORMATION |
OPERATOR MANUALL |
OM-NEB/1 |
Partt Numbermber 114866986 9 Rev. B
DOMESTIC
Model: NEB/1
Steam Boilers
Electrically Heated 24, 36 or 48 Kilowatts
THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE. READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND WARNINGS CONTAINED IN THIS MANUAL.
WARNING
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.
Information contained in this document is known to be current and accurate at the time of printing/creation. Unified Brands recommends referencing our product line websites, unifiedbrands.net, for the most updated product information and specifications.
OM-NEB/1
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IMPORTANT — READ FIRST — IMPORTANT |
CAUTION: |
SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT. |
CAUTION: |
UNIT WEIGHS 620 LB (282 KG) FOR SAFE HANDLING, INSTALLER SHOULD |
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OBTAIN HELP, OR EMPLOY APPROPRIATE MATERIALS HANDLING |
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EQUIPMENT (FORKLIFT, DOLLY, OR PALLET JACK) TO REMOVE THE UNIT |
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FROM THE SKID AND MOVE IT TO ITS PLACE OF INSTALLATION.. |
WARNING: |
THE UNIT MUST BE INSTALLED BY PERSONNEL WHO ARE QUALIFIED TO |
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WORK WITH ELECTRICITRY AND PLUMBING. IMPROPER INSTALLATION |
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COULD RESULT IN INJURY TO PERSONNEL AND/OR DAMAGE TO |
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EQUIPMENT. |
CAUTION: |
DRAIN MUST BE RATED FOR STEAM AND BOILING WATER. DO NOT USE |
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PLASTIC PIPE. |
WARNING: |
DO NOT CONNECT THE BOILER DRAIN DIRECTLY TO A BUILDING DRAIN. |
WARNING: |
BLOCKING THE DRAIN MAY BE HAZARDOUS. |
IMPORTANT: |
Improper drain connection will void warranty. |
WARNING: |
ALLOW COOKING CHAMBERS TO COOL BEFORE CLEANING. |
WARNING: |
CAREFULLY READ THE WARNINGS AND FOLLOW THE DIRECTIONS ON THE |
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LABEL OF EACH CLEANING AGENT. USE SAFETY GLASSES AND RUBBER |
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GLOVES AS RECOMMENDED BY DELIMING AGENT MANUFACTURER. |
WARNING: |
DO NOT MIX DE-LIMING AGENTS (ACID) AND DE-GREASERS (ALKALI) IN THE |
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STEAM GENERATOR OR ON THE COOKING CHAMBER WALLS. |
NOTICE: |
Do not use a cleaning or de-liming agent that contains any sulfamic acid or |
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any chloride, including hydrochloric acid (HCl). If the chloride content of any |
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product is unclear, consult the manufacturer. Do not use a de-greaser that |
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contains potassium hydroxide or sodium hydroxide or that is highly alkaline. |
WARNING: |
USE OF REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY GROEN |
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OR AUTHORIZED DISTRIBUTORS VOIDS ALL WARRANTIES AND CAN CAUSE |
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BODILY INJURY TO THE OPERATOR AND DAMAGE THE EQUIPMENT. |
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SERVICE PERFORMED BY OTHER THAN FACTORY-AUTHORIZED |
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PERSONNEL WILL VOID ALL WARRANTIES. |
WARNING: |
HIGH VOLTAGE EXISTS INSIDE CONTROL COMPARTMENTS. DISCONNECT |
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FROM BRANCH BEFORE SERVICING. FAILURE TO DO SO CAN RESULT IN |
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SERIOUS INJURY OR DEATH. |
WARNING: |
DO NOT EXPOSE SKIN TO ESCAPING STEAM. SEVERE BURNS CAN RESULT. |
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OM-NEB/1
Table of Contents
OPERATOR WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 EQUIPMENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INSPECTION AND UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 WATER CONDITIONING REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SERVICE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 WARRANTY PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
[SEE OM-HY-6CAV FOR STEAMER CAVITY OPERATION AND/OR OM-TD FOR KETTLE OPERATION.]
The NEB-1 Boiler may be used for a variety of applications in a variety of combinations.
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OM-NEB/1
Equipment Description
The Groen NEB/1 steam boiler generates low pressure steam for use with HyPlus cabinet-mounted steamers and steam jacketed kettles.
The boiler is housed in a stainless steel cabinet. Various combinations of steam-operated kettles and steamers can be mounted on the top. The boiler is small enough to fit in a 24-1/8” (613 mm) wide by 34-3/16" (868 mm) deep by 29-3/16" (741 mm) tall (maximum) cabinet.
The boiler is constructed of 1/4" thick steel, which is certified by the American Society of Mechanical Engineers (ASME) for pressure vessels. All welds are hydrostatically tested.
The boiler is also equipped with all required instruments, fittings, and controls.
Heating elements with low watt density ensure longer life for the unit. The boiler is available for three phase 60 Hertz service in the following voltage and power combinations:
208 Volts |
240 Volts |
480 Volts |
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24 Kilowatt |
24 Kilowatt |
24 Kilowatt |
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36 Kilowatt |
36 Kilowatt |
36 Kilowatt |
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48 Kilowatt |
48 Kilowatt |
48 Kilowatt |
Inspection and Unpacking
The unit will arrive completely assembled, wrapped in protective plastic and in a heavy-duty carton on a skid. Immediately on receipt examine the carton and unit for shipping damage. Report any damage or incorrect shipments to the delivery agent.
Write down the model number, serial number and installation date of your unit, and keep this information for future reference. Space for these entires is provided at the top of the Service Log on Page 21 of this manual.
CAUTION
SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.
UNIT WEIGHS 620 LB (282 KG) OR MORE. FOR SAFE HANDLING OBTAIN HELP, OR USE MATERIALS HANDLING EQUIPMENT (FORK LIFT, DOLLY OR PALLET JACK) TO REMOVE THE UNIT FROM THE SKID AND MOVE IT TO ITS PLACE OF INSTALLATION.
When installation is to start, cut the straps and lift the unit straight up off the skid.
Unit will arrive in a heavy carton, mounted on a skid.
Beneath the heavy carton, the unit will be wrapped in protective plastic on a heavy skid.
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OM-NEB/1
Water Conditioning
It is essential that the boiler be supplied with water that will not form scale at an unacceptable rate. The boiler was engineered to minimize scale, but its formation depends on water hardness and how much the unit is used.
In some areas of the United States the water is low enough in mineral content to avoid scale build-up. However, most water supplies carry heavy loads of minerals. This will form scale on the boiler, reduce its steam output, and possibly cause premature component failure.
Your water utility can tell you about the minerals in your water. The water going to the steam generator should have between 1 and 30 parts per million total dissolved solids (TDS) and should have a pH (acidity rating) of 7.0 or higher.
Please follow these simple precautions:
1.Do not rely on unproven water treatment equipment which is sold for scale prevention or scale removal. It frequently won’t work. The best way to prevent scale is to supply the purest possible water.
2.If your water contains scale-forming minerals, as most water does, use a well-maintained water softener. Whether an exchangeable softener cartridge or a regenerating system is chosen, a regular exchange system is essential.
3.Installing a water meter between the softener and the steamer will provide an accurate gauge of water use, and will help determine when to exchange cartridges or regenerate the softener. Using a water softener will provide longer generator life, higher steam capacity, and reduce maintenance requirements.
4.If you notice a slowdown in steam production, check the boiler for scale build-up. Heavy scale reduces the unit’s ability to boil water, and can even cause heating elements in the steam generator to overheat and burn out.
5.Groen gas and electric pressure boilers are also available with two separate water intakes:
one for the boiler (soft water)
one for the spray condenser (untreated water).
The steam generator only uses 14 to 31% of a steamer’s water. Since softener systems are typically sized by total GPH (gallons per hour), the second intake could reduce treatment requirements by up to 80%, resulting in significant savings.
Reduce scale problems by using and maintaining a water softener for your steamer!
Installation
WARNING
THEUNITMUSTBEINSTALLEDBYPERSONNELWHOAREQUALIFIEDTOWORKWITH ELECTRICITY AND PLUMBING. IMPROPER INSTALLATION CAN CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE EQUIPMENT.
Getting Started
WHEN THE UNIT IS RECEIVED, IMMEDIATELY INSPECT IT FOR EXTERNAL OR INTERNAL DAMAGE. REPORT ANY DAMAGE TO THE FREIGHT CARRIER.
NOTE: A RETROFIT KIT IS AVAILABLE FROM THE FACTORY FOR THOSE LOCALITIES IN WHICH COMPLIANCE WITH CSD-1 STANDARDS IS REQUIRED.
After inspection, keep the unit in its shipping container until it is installed. It can be installed on combustible and non-combustible floors. Minimum clearances are:
Right Side — Two inches* Left Side — Four inches Rear — Six inches
*In order to service the unit properly, access with at least 24 inches clearance is needed on the right side.
Level the unit front to rear and left to right by adjusting its legs. Levelness may be checked by using a spirit level on top of the cabinet.
CAUTION
MAKING ANY ELECTRICAL OR MECHANICAL CHANGEINTHEUNITWITHOUTPRIORGROEN APPROVAL WILL VOID ALL WARRANTIES.
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OM-NEB/1
1. Electrical Supply Connection
Provide the proper voltage (60 Hz, Three Phase) as specified on the electrical information plate attached to the unit. The current draw and minimum recommended wire size and insulation temperature ratings are shown in the table below. Use only copper wire. Local codes and/or the National Electrical Code should be followed (ANSI/NFPA-70- 1987 - or latest edition).
AN ELECTRICAL GROUND IS REQUIRED. The ground terminal is located next to the supply terminal block in the electrical enclosure. The main supply knockout hole is sized for a 1½” conduit fitting. The auxiliary supply knockout is sized for a ¾” conduit fitting. Copies of the electrical schematic are located in the electrical enclosure on the equipment and in this manual. In Canada, electrical service must comply with the Canadian Electrical Code, CSA C22.1, Part 1, and/or local codes.
Voltage |
Power Rating |
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Current Draw |
Supply Wire |
Ground Wire |
Rating |
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(Kilowatt) |
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(Ampere) |
AWG |
mm |
AWG |
mm |
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208 |
24 |
67 |
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2 |
6.5 |
8 |
3.3 |
90oC |
208 |
36 |
100 |
2/0 |
9.3 |
6 |
4.1 |
90oC |
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208 |
48 |
100 (Main) |
2/0 |
9.3 |
6 |
4.1 |
90oC |
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34 |
(Auxiliary) |
6 |
4.1 |
10 |
2.6 |
90oC |
240 |
24 |
58 |
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3 |
5.8 |
8 |
3.3 |
90oC |
240 |
36 |
87 |
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1 |
7.3 |
8 |
3.3 |
90oC |
240 |
48 |
87 (Main) |
1 |
7.3 |
6 |
4.1 |
90oC |
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29 |
Auxiliary) |
8 |
3.3 |
10 |
2.6 |
90oC |
480 |
24 |
29 |
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3 |
5.8 |
10 |
2.6 |
75oC |
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8 |
3.3 |
10 |
2.6 |
90oC |
480 |
36 |
44 |
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1/0 |
8.3 |
10 |
2.6 |
75oC |
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6 |
4.1 |
10 |
2.6 |
90oC |
480 |
48 |
58 |
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2/0 |
9.3 |
8 |
3.3 |
75oC |
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3 |
5.8 |
8 |
3.3 |
90oC |
2. Water Connection
a.Cold water is supplied via a ½" NPT pipe connection at the rear of the unit. A check valve (back siphonage device) must be installed in accord with local plumbing codes.
a.Water pressure should be between 30 and 60 PSI (215 and 420 kPa). If it is over 60 PSI (420 kPa), a pressure regulator is required. A strainer screen at the connection is also recommended, to trap any debris before it can enter the system.
c.The NEB/1 boiler uses water at the maximum rate per hour shown below.
Maximum Water Consumption
Unit |
Gallons/Hour |
Liters/Hour |
NEB/1 (24 KW) |
8.2 |
31 |
NEB/1 (36 KW) |
12.5 |
47.3 |
NEB/1 (48 KW) |
16.9 |
64 |
Piping should be sized to handle total water consumption.
3. Drain Connection
a.The drain connection is made at the rear of the unit with 1¼" NPT pipe. DO NOT USE PLASTIC PIPE. DRAIN PIPING MUST WITHSTAND STEAM AND BOILING WATER. Extend the drain piping to a nearby floor drain. Piping of 1¼" NPT (or 1½" NPT) is acceptable for distances of six feet (2 m) or less. If the distance to the drain is further than six feet (2 m), use 2" NPT piping.
b.The drain line must have a constant downward pitch. Do not permit water traps in the line. DO NOT CONNECT THE LINE DIRECTLY TO ANY BUILDING DRAIN. There must be a vertical air gap of at least two inches (5 cm) between the drain line and the building drain unless otherwise specified by local plumbing codes.
CAUTION
DO NOT LOCATE THE BOILER CABINET DIRECTLY OVER A FLOOR DRAIN OR FLOOR SINK. HUMIDITY OR WATER FROM A DRAIN WILL DAMAGE ELECTRICAL PARTS.
IMPORTANT: Improper drain connection will void warranty.
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