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Single, Double, Triple, & Four Sink Setups.
Available on any size Klose
Mobile Smoker.
Sinks can be made of
Stainless Steel,
© Copyright 1996-2007
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New Tankless Hot Water On Demand with
Hydro-Ignition
New Top Mounted, Gravity Fed Water Tanks
Available. On Demand Hot Water Appliance details . Burner output proportional to hot water flow demand for maximum energy efficiency . Stainless steel burners with stabilized blue flame . Built-in corrosion resistant draft diverter . Adjustable water flow restrictor to ensure that water flow demand will not exceed the heating capacity of the heater . Safety flame sensor at pilot burner . Automatic overheating protection shut-off sensor . Copper heating coils for endless supply of hot water . Easily removable one-piece cover . Easy one person installation . Electronic Pilot Ignition driven by hydro-generator. Specifications (Technical data) Approved in US/Canada Capacity Maximum flow rate: 3.7 GPM (14 l/min) at a 45°F (25°C) rise. Maximum output 101,772 Btu/h (29.8 kW) Maximum input 117,000 Btu/h (34.3 kW) Efficiency in % Recovery efficiency 80% Min. Output 28,000 Btu/h (8.2 kW) Gas Requirement Gas connection (inches) - ¾. Inlet gas pressure under maximum operation* . Propane: 10.5. - 14. water column . Natural Gas: 5.7. - 14. water column. * To measure Gas Pressure, see Measuring Gas Pressure, chapter 3.6.
Water . Hot water connection (inches) - ½. . Cold water connection (inches) - ½.
. Water valve material: Polymer (PPS) (Polypropylene Sulfid) . Minimum water flow: 0.5 gallon/minute (1.9 l/m) . Minimum recommended water pressure: 30 PSI (2.07 bar) . Connections: . Bottom of heater Dimensions . Depth (in): 10.5. (265 mm) . Width (in): 18.25. (460 mm) . Height (in): 36.75. (936 mm) . Weight: 64 pounds (29 kg). Gas types Natural Gas. LP Gas Safety devices . Flame failure device (ionization flame rod sensor) . Pressure relief valve (supplied with heater) . Over heat prevention (temperature limiter). Water resistant IP X5 (protection against water drops).
not approved or designed for: . Manufactured (mobile) homes, RV's or boats . Heating or other recirculating/pumping applications* . Solar/preheat backup or high temperature booster use * This includes domestic hot water circulator pump loop systems that may previously exist in a home hot water system. The use of a small electric mini-tank (4-6 gallon size) should be used for this application; when designed so the pump will circulate the hot water in the mini-tank only and through the building's hot water return loop (timed or thermostatic controlled operation of the pump is commonly done). The GWH-425-HNO should be plumbed in line before the mini-tank water heater, contact BBTNA if further instruction is needed.
3 Installation instructions 3.1 Introduction Please follow these instructions. Failure to follow instructions may result in: B Damage or injury. B Improper operation. B Loss of warranty. Please contact BBT North America with any questions. 3.2 Proper location for installing your heater Carefully select the location of the water heater. Follow the guidelines below: B 1. Locate the heater where an adequate gas line size and plumbing connections are feasible and convenient. B 2. The hot water lines should be kept short to save energy. Centrally locating the water heater is best. It is always best to have hot water lines insulated to prevent the possibility of any freeze damage. B 3. The water in this heater is cold and always remains cold except for the times that hot water is being used. The heater is equipped with freeze prevention equipment that will operate and prevent freezing of the water in the heater to 5°F with no wind chill. Electrical power must be maintained to the heater to allow this to function. WARNING: Proper insulation of the water lines below the heater is required if below freezing temperatures, below 32°F, are ever anticipated! Danger: If the temperature drops below 32°F, freeze damage to the water heater itself must be prevented by turning off the power to the heater, then disconnecting the plumbing connections, as well as removing the drain plug and introducing short bursts of compressed air (20-40 psi) through the heater's connections. This will remove the residual water in the horizontal pipes and water valve. Danger: Keep children away as the top of the water heater vent cap will get very hot during operation. Install in a place that prevents the top of the heater being reached by small children. Danger: Flue gases will be released through the vent cap. Flue gas is very hot and contains carbon monoxide. The heater cannot be installed indoors. To prevent risk of fire and poisoning by carbon monoxide, assure all clearances indicated in manual. Danger: Surface temperature around vent cap is less than 140°F, except highest top surface of vent cap may reach 300°F. Danger: Do not place or store any combustible material within 5 feet of the appliance. Risk of fire could be caused by hot flue gas. Warning: Flammable materials, gasoline, pressurized containers, or any other items or articles that are potential fire hazards must NOT be placed on or adjacent to the heater. The appliance area must be kept free of all combustible materials, gasoline and other flammable vapors and liquids. Installation instructions 3.5 Gas piping & connections Before connecting the gas supply, check the rating plate on the right side of the heater to be sure that the heater is rated for the same gas to which it will be connected. Note: comes with a gas pressure regulator installed. Disconnecting or altering the gas pressure regulator will be a violation of CSA certification of the unit. The regulator supplied with the heater is preset for the gas shown on the rating plate to the correct pressure. It is an appliance level regulator designed for (low inlet) pressure (less than 1/2 Psig or 14" W.C.). GAS CONNECTIONS B Install a manual gas shut off valve, on the gas supply line. B Install a union when connecting gas supply. B The minimum diameter required for any appliance connector used is ¾.. B National Fuel Gas Code requires that a sediment trap (drip leg) be installed on gas appliances not so equipped. The drip leg must be accessible and not subject to freezing conditions. Install in accordance with the recommendations of the serving gas supplier. When connections are made, check for gas leaks at all joints. Apply some gas leak detection solution to all gas fittings. Bubbles are a sign of a leak. A combustible gas detector may also be used to detect for leaks. HIGH ALTITUDE INSTALLATION The pressure regulator provided with the heater is adjusted to deliver the proper gas pressure (as indicated on the rating plate and in the manual for altitude up to 2000 feet (660 meters) above sea level. On appliances being installed above 2000 ft (660 meters) elevation, the inlet gas pressure should be set at installation to the value shown below. Note: The gas pressures specified below refer to pressures taken at the pressure tap on the gas inlet pipe just above the regulator. See chapter 3.6 for measuring gas pressure. MAXIMUM INLET GAS FLOW PRESSURE SETTING GAS LINE SIZING The gas supply piping should be sized according to the applicable code for a maximum draw of 117,000 BTUH. Measure the length of gas supply line and use the tables in Fig. 8 or the gas line manufacturer”s sizing tables to determine the pipe diameter necessary to accommodate the BTU demand of the unit. If there are more gas drawing appliances on the line, size the gas line according to the total maximum amount of BTU draw for all appliances. Note: Under sizing the gas line may result in diminished output and improper operation. See chapter 3.6 for the procedure to confirm gas pressure. Warning: DO NOT connect to an unregulated or high pressure propane line or to a high pressure commercial natural gas line. Warning: The heater must be isolated from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0.5 psig. If overpressure has occurred, such as through improper testing of the gas lines or malfunction of the supply system, the gas valve must be checked for safe operation Danger: If you have a leak, shut off the gas. Tighten appropriate fittings to stop leak. Turn the gas on and check again with a gas leak detection solution. Never test for gas leaks using a match or flame. Altitude Nat. Gas inches W.C. Liquid Propane inches W.C. 0. - 2 000 ft 5.7. 10.5. 2 000 ft - 4 500 ft 4.6. 8.4. Table 3 Above 4.500 ft consult your local gas provider 8 716 473 148 Installation instructions FOR NATURAL GAS Maximum Capacity of pipe in Cubic Fee
3.6 Measuring gas pressure Connecting manometer B Shut off gas. B Remove front cover and locate inlet gas pressure measuring point on the right side of the gas valve. B Loosen screw from test point on the left side of gas valve and connect manometer tube on test point. Static pressure test B Turn gas supply back on. B Operate all other gas appliances on same gas piping system at maximum output. B Record static gas pressure reading on back page of manual. Operating pressure test B Run high hot water flow rate. B Set flow control knob fully clockwise. B Set slide control to the right. B Record operating gas pressure reading on back page of manual. Gas pressures lower than 5.7" W.C. for Natural Gas or 10.5" W.C. for LP Gas will result in insufficient degree rise to the hot water being used, and must be corrected. See Gas Line Sizing under chapter 3.5. 3.7 Water connections When facing the heater, the ½. cold water inlet is on the bottom right and the hot water outlet is on the bottom left. B INSTALL A UNION WHEN CONNECTING WATER PIPE TO FACILITATE ANY NECESSARY CLEANING AND SERVICING. Although water piping throughout your structure may be other than copper, we recommend that copper piping or suitably rated stainless steel flex line piping be used for at least three feet before and after the heater (follow local codes if more stringent). Never sweat any rigid piping directly to or beneath the water connections, damage can occur to the internal water valve from heating of the pipe. Plastics or other PEX type plumbing line materials are not recommended for connecting directly to the water heater. Keep water inlet and outlet pipes to no less than ½" (12.7mm) diameter to allow the full flow capacity. It is recommended that all water piping below the heater be properly insulated to avoid heat loss. If below freezing temperatures are ever anticipated where the heater is located, insulation material is required and must be capable of protecting the piping from freezing. The freeze protection that is equipped within the heater will not prevent any freeze damage to the exterior water piping. If the cold and hot connections to the heater are reversed, the heater will not function. Be certain there are no loose particles or dirt in the piping. Blow out or flush the lines before connecting to the water heater. Full port valves should be installed on both the cold water supply and hot water outlet lines to facilitate servicing the heater (see Fig. 9). For installation on a private well system with the use of a pressure tank, the lowest pressure range setting recommended is 30-50 psi (2.07 and 3.45bar). Connecting the pressure relief valve (PRV) A listed pressure relief valve supplied with the heater must be installed at the time of installation. No valve is to be placed between the PRV and the heater. No reducing coupling or other restriction may be installed in the discharge line. The discharge line must be a minimum of 4. above a drain and installed such that it allows complete drainage of both the PRV and the line. The location of the PRV must be readily accessible for servicing or replacement, and be mounted as close to the water heater as possible. See Fig. 9. To install the PRV, a suitable fitting connected to an extension on a .T. fitting can be sweated to the hot water line. Support all piping.
4 Operation instructions 4.1 For your safety read before operating your water heater A. This appliance is equipped with electronic ignition for lighting the main burners. When turning the heater on, follow these instructions exactly. B. What to do if you smell gas. WHAT TO DO IF YOU SMELL GAS B Do not try to light any appliance. B Do not touch any electric switch; do not use any phone in your building. B Immediately call your gas supplier from a neighbors phone. Follow the gas supplier.s instructions. B If you cannot reach your gas supplier, call the fire department. C. Use only your hand to turn the on/off control switch. Never use tools. Follow these instructions exactly. If control switch is jammed, close the gas supply and call a qualified service technician. Attempted forceful repair may result in a fire or explosion. D. 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. 4.2 Lighting instructions B 1. STOP! Read the previous safety information. B 2. Turn off power supply to heater. B 3. Open the cold water inlet supply to the heater fully. B 4. Open a hot water faucet to permit the water to fill the heater and the piping and to eliminate the air trapped in the system. B 5. Close the hot water faucet after the water flows freely and all the air has escaped from the system. The water heater is now ready to operate. B 6. Open gas isolation valve. Wait five (5) minutes. If you smell gas, STOP! Follow .B. in the safety information above. If you do not smell gas, go to the next step. B 7. Set the switch (located behind the sliding viewer window on the front panel strip) to the .ON. position. In this position, the water heater is ready to use. Note: On first time initial installation, existence of air in the gas supply line and in the water line may cause some ignition delay. In that case, repeatedly open and close the hot water tap in order to restart the ignition process until all the air has been purged. B 8. Turn the hot water faucet on to the minimum flow rate required to activate the heater. The automatic ignition system first ignites the safety pilot burner which then ignites the main burner in about 4 seconds. B 9. The pilot flame will extinguish 10-30 seconds after the burners come on. The burners will remain on until the hot water tap is turned off. B 10. For maximum power, slide gas valve button all the way to the right. 4.3 To turn off appliance B Turn off the manual gas shut off valve on the supply line to the heater. See Fig. 11. B Turn power switch to the off (O) position. B Drain water lines if unit will sit for a long period of time. 4.4 Setting the water temperature This unit has a gas control that modulates burner input in response to flow. Its purpose is to ensure that the hot water temperature will remain steady, although the water flow demand might vary. The output temperature can be adjusted with either the temperature adjustment knob or the gas control slide. Fig. 10 Temperature Adjustment Controls Temperature adjustment knob The temperature adjustment knob on the front bottom of the heater (see Fig. 10) adjusts temperature by adjusting flow capacity. See table 4 for details. 5 Maintenance and service 5.1 Maintenance intervals The 425 HNO requires periodic maintenance. The below time maintenance intervals should kept the unit operating for many years. Every year B Inspect inlet water filter screen ( 5.2) B Inspect pilot assembly and flame ( 5.3) B Inspect burner assembly ( 5.4) B Inspect vent assembly ( 5.6) Every 2 years B Lubricate and clean water valve ( 5.2) Every 3 to 5 years B Rebuild water valve ( 5.2) B Clean pilot assembly and clean or replace orifice ( 5.3) 5.2 Water valve The water valve is the main control that tells the heater to fire. If the periodic maintenance is neglected, more costly damage may occur over time. Inspecting inlet water filter screen Shut off the installer supplied cold water supply valve. Disconnect water pipe going to the back of the water valve. Remove filter from back of water valve. Clean the filter and inspect for damage. Replace if the filter is at all damaged. Inspect the top of the water valve for signs of a water leak or corrosion. If present, rebuild the water valve. (See below). Lubricating the water valve A more detailed instruction is available on our website at www.boschpro.com. Shut off all water to the unit and disconnect water pipe going to the back of the water valve. Disconnect water pipe going to heat exchanger by removing pin and pulling pipe out. Loosen two set screws at the base of the gas valve and drop the water valve down. Separate the two halves by removing 5 screws on the top of the water valve. Apply lithium or faucet and valve grease to the pushrod (see Fig 14, pos. 31). Inspect and clean the venturi (see Fig 14, pos. 49). Rebuilding the water valve Several parts within the water valve should be replaced every 3-5 years. The parts list and instruction can be found on our website at www.boschpro.com. 5.3 Pilot Inspecting pilot The pilot should burn with a clean sharp blue flame. The flame should fully envelope the bend of the flame sensor rod. If it does not, clean the pilot assembly per procedure below. Cleaning pilot assembly Disconnect the flame sensor rod cable and the igniter cable by pulling gently down. Remove two screws holding pilot assembly in place. Loosen compression fitting and remove pilot assembly. NOTE: The orifice sits on top of the compression fitting DO NOT LOSE. Polish flame sensor rod and igniter tip with emery cloth. Clean out pilot assembly and orifice with carburetor cleaner. If heater is an LP unit, replace orifice. Caution: Do not enlarge orifice. 5.4 Main burners The main burner flames should be blue, with a more intense blue cone in the center core. Yellow flames could be a sign of wrong size gas orifices or dirty burners, or a blockage on the heat exchangers fins. If some burners have yellow flames while others have good flames, it is likely that dust, lint or spider webs have partially clogged the burner venturis. To clean the burners, contact a gas service person. 5.5 Vent assembly Inspect the draft hood and heat exchanger fins for signs of soot build-up or any other foreign material such as spider webs. Clean out any debris found in the vent hood. Signs of soot indicate insufficient combustion air or exhaust draft. Check for vent assembly blockage or combustion air blockage on the underside of the unit. 5.6 Mineral scale build-up When operated at lower temperatures settings, this unit does not accumulate mineral build-up. If however, the heater is used at the higher temperature settings and the water has a high mineral content, periodic descaling may be necessary. The heating coils should be flushed with a descaling solution. Consult your dealer or BBT North America for instructions. Consult your service person. |
 Stainless Steel Sinks with Solid Polished Brass Faucets are Nice   Double Sink Setup in Polished Aluminum Floor Plate. Triple or even Four Sink Setups also Available here.  Sinks shown here on a 42 Inch Diameter by 10 foot Mobile with 42 x 42 Inch Upright Slow Smoker, & gas fired heat box over the Firebox, 5 burners on the rear, & steak grill on the nose.
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