WARNING: IF THE INFORMATION IN THESE
INSTRUCTIONS IS NOT FOLLOWED EXACTLY,
A FIRE OR EXPLOSION MAY RESULT CAUSING
PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPORS AND LIQUIDS IN THE
VICINITY OF THIS OR ANY OTHER APPLIANCE.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use
any phone in your building.
•Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
•If you cannot reach your gas supplier, call the
fire department.
INSTALLATION AND SERVICE MUST BE
PERFORMED BY A QUALIFIED INSTALLER,
SERVICE AGENCY, OR THE GAS SUPPLIER.
The Infrared Booster Gas Water Heaters (available
for natural gas or propane) provide 180°F rinse water
for commercial dishwashing machines. Health codes
and NSF permit 180°F (minimum temperature) water
to be used as a sanitizing rinse for utensils and
dishware used in restaurants and food-serving
operations. Water enters the gas booster water
heater at the inlet water connection, circulates through
the gas heat exchanger and stainless steel tank, and
constantly maintains the 180°F minimum water
temperature at the outlet connection. The table,
Delivery Rates @ 180°F
amount of hot water that can be delivered by the
various Booster Heater models, depending on the
incoming water temperature.
, indicates the maximum
Rinse water volume requirements for various commercial dishwasher models and operating rates are
available from your authorized Hobart dealer.
Immediately after unpacking, check for possible shipping damage. If the Booster Heater is found to
be damaged after unpacking, save the packaging material and contact the carrier within 15 days of
delivery.
Prior to installation, test the electrical service to assure that it agrees with the specifications on the data
plate located on the left-front panel of the booster heater. Be sure that the type of gas supplied to the
machine (natural gas or propane) is the same as indicated on the data plate.
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, ANSI Z223.1 (latest edition) 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).
LOCATION
Locate the IB Series Booster Water Heater so that the required clearance dimensions are maintained.
Keep the appliance area clear and free from combustible materials, gasoline and other flammable
vapors and liquids. The booster heater should not be located in an area where water leakage will result
in damage to the area adjacent to it or to lower floors of the structure. Where such areas cannot be
avoided, install a suitable catch pan, adequately drained, under the heater. The pan must not restrict
combustion air flow. Do not install heater directly on carpeting.
Four legs are welded to the bottom corners of the frame to provide the required six-inch floor clearance.
Adjustable feet at the bottom of the four legs should be rotated in or out as required to level the booster
heater front-to-back and side-to-side in its final location.
COMBUSTION / VENTILATION AIR
CAUTION:
Combustion air must not be contaminated by corrosive chemical fumes which can
damage the heater.
An adequate supply of air for proper combustion and ventilation must be provided in accordance with
the National Fuel Gas Code, ANSI Z223.1, or applicable building codes. Do not obstruct the flow of
combustion and ventilation air to the heater.
– 5 –
VENTING REQUIREMENTS
WARNING: PROVIDE A SCREEN OR BARRIER TO PREVENT PERSONAL INJURY IN AREAS
WHERE INADVERTENT PERSONNEL CONTACT WITH THE HOT VENT PIPE CAN OCCUR.
Models IB57 and IB140 are Category IV (positive flue
Models IB235 & IB290 Only
pressure, excessive condensate, and flue gas
temperature at the heater outlet approximately 330°F).
Models IB235 and IB290 are Category III (positive flue
pressure, not excessive condensate, and flue gas
Water Out
temperature at the heater outlet approximately
530°F). The vent outlet on the booster heater is 3
inches in diameter. Models IB57 and IB140 require
3 inch minimum vent pipe throughout. Models IB235
and IB290 require 4 inch minimum vent pipe; the 3
inch adjustable vent pipe elbow and the 3 inch to 4
3 to 4 Inch
Adapter
3 Inch Elbow
Vent
Gas
Water In
inch vent pipe adapter (provided on IB235 and IB290)
are to be installed at the vent outlet of the booster
1
heater (Fig. 1). On all models,
/4 inch per foot minimum
incline must be maintained.
Temperature and
Pressure Relief Valve
Fig. 1
PL-53440
Vent piping must be one of the types mentioned in this manual and must be properly installed according
to the vent pipe manufacturer's instructions. Each vent joint must be properly sealed and secured so
it stays in place.
Per the National Fuel Gas Code, ANSI Z223.1, the heater must be vented in one of three ways:
1. Into the exhaust system (Fig. 2). The vent pipe must not penetrate the filter. When the heater is
vented into the exhaust system, an electrical interlock must be provided (by others) to allow the flow
of gas to the booster heater burner ONLY when the exhaust system is functioning. Refer to APS1
and APS2 on the wiring diagram in the control box accessed by removing the left side panel (also
refer to pages 12 and 13).
2. Through the sidewall, or the ceiling (Fig. 3). Type B-1 vent pipe (4 inch minimum diameter for IB57
and IB140, 5 inch minimum diameter for IB235 and IB290) may be used when venting vertically,
provided a one inch minimum clearance to combustible construction is maintained and the
termination above the roof uses a listed wind cap.
3. Freely vented into the room or space where it is installed (Fig. 4), provided that:
a. A mechanical exhaust system is present in the kitchen,
b. The flue outlet of the booster water heater is at least 36 inches vertically and 6 inches
horizontally distant from any surface other than the booster / or dishwasher, and
c. Any or all gas fired equipment is installed so the total BTU input rating of the unvented gas
appliance(s) divided by the total cubic feet of the room area (including any areas adjacent that
cannot be closed off) does not exceed 20 BTU per hour per cubic foot.
– 6 –
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