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All Bosch instantaneous water heaters heat water only as required; no energy is lost maintaining a large volume of water at elevated temperatures as in tank-type storage water heaters. Suitable for heating potable water only – not approved for space heating purposes. READ INSTRUCTIONS CAREFULLY BEFORE INSTALLING 6 720 606 447 CA ( 05.05) AL NOTICE TO INSTALLER: Please leave this manual with the owner or affix adjacent to appliance. ASTRAVAN DISTRIBUTORS, LTD. 123 Charles Street North Vancouver, B.C. V7H 1S1 Phone Canada: (604) 929-5488 Phone USA: (206) 860-8448 Web Site: WARNING: If the information in this manual 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 applicance. - 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. Note: In case of problems please contact your salesman or installer DIMENSIONS Figure 1 Maximum hydrostatic water pressure - 0.97 MPa (150 p.s.i.) Maximum recommended working pressure - 0.69 MPa (100 p.s.i.) Minimum working pressure - 0.01 1 MPa (2 p.s.i.) at 1.6 Litres/min. (0.5 U.S. Gal/min.) free discharge Minimum recommended inlet water pressure for use with showers 40 p.s.i.g. NG Altitude LPG Altitude Standard High Standard High Tap pressure inch 5,7 4,6 Tap pressure inch 10,5 8,4 Manifold burner pressure inch 3,35 2,7 Manifold burner pressure inch 10,2 8,1 Dimensions in millimetres (inches) A B C D E F G H I J 270 610 230 190 70 562 350 312 102 138 (10 5/8) (25 3/8) (9 1/8) (7 1/2) (2 3/4) (22 1/8) (13 3/4) (12 1/4) (4) (5 3/8) Model Type of Gas Altitude Input Main Burner Orifices Size, mm Qt. W 125 K… natural standart (0-2,000 ft.) 11.7 kW (40,000 Btu/hr) 1.25 diam. 6 propane 0.76 diam. 6 W 125 K… natural high * (2,000-4,500 ft.) 10.5 kW (36,000 Btu/hr) 1.25 diam. 6 propane 0.76 diam. 6 * The high altitude ratings listed are Canadian Gas Association high altitude ratings and are only valid in Canada. In the U.S., the National Fuel Gas Code, ANSI Z223.1/NFPA 54 recommends for high altitude installations above 2,000 feet, that the input rate be reduced 4% for each 1,000 feet above sea level. FORWARD This design complies with CAN 1-4.3-77 and ANS1 Z21.10.3b 1994 as an instantaneous gas water heater. In addition the unit complies with CAN1-2.17-M80 for use at high altitude, 2.000-4.5000 feet above sea level. Instalation, operation and maitenance information is provided in this manual. Installation and operation instructions should be thoroughly reviewed before proceeding with installation of the BOSCH instantaneous gas water heater. The BOSCH instantaneous gas water heater is designed to operate on natural or propane gas; however, make sure that gas on which heater is to operate is the same as specified on the heater’s model/rating plate. In addition to these instrutions,the water heater shall be installed in accordance with CAN1-B149 Installation Code (in Canada) or ANSI Z223-1/NFFA 54 National Fuel Gas Code (in U.S.) and/ or local installation cades. These shall be carefully followed in all cases. INSTALLATION INSTRUCTIONS Note: Proper plumbing, venting, gas connections and an adequate supply of combustion air are required for safe and reliable operation. Ability equivalent to that of a licensed tradesman in the field involved is required for installation and/or servicing of these water heaters. LOCATION Before installing the BOSCH instantaneous gas water heater consideration must be given to proper location. The BOSCH W125K... instantaneous gas water heater may be installed to supply hot water to remote locations. Location should be as close to a chimney or gas vent as practical, in an area with an adequate air supply and as centralized with the piping system as possible. The heater should not be located in an area where it will be subject to freezing. The heater should be located in an area where leakage of the heater or its connections will not result in damage to the area adjacent to the heater or to lower floors of the structure. Note: When such locations can not be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the heater. The pan must not restrict combustion air flow. AIR REQUIREMENTS For safe operation, sufficient air for combustion, ventilation and dilution of flue gases must be available. An insufficient supply of air will result in a yellow luminous burner flame, causing carboning or sooting of the heat exchanger. In unconfined spaces, in buildings of normal construction, infiltration norm...
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