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Instantaneous gas water heater
Models
W 125...T1
• installation
• operation
• maintenance
The Bosch instantaneous water heater is a high efficiency,
space saving answer to your water heating needs. 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
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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. Altitude Altitude NG LPG 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
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FORWARD This design complies with CAN 1-4.3-77 and ANS1 The BOSCH instantaneous gas water heater is designed to Z21.10.3b 1994 as an instantaneous gas water heater. In operate on natural or propane gas; however, make sure that addition the unit complies with CAN1-2.17-M80 for use at gas on which heater is to operate is the same as specified high altitude, 2.000-4.5000 feet above sea level. on the heater’s model/rating plate. Instalation, operation and maitenance information is provided In additi
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WARNING 1. Flammable materials, gasoline, pressurized containers, or any other items or articles that are potentially fire hazards must never 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. 2. Do not obstruct the flow of combustion and ventilation air to the appliance. CLEARANCES This heather is designed certified for installation on a combustible wall, in an alcove with minimum clearance
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Check to make sure that the gas listed on the rating plate is PROPANE SUPPLY same as gas listed on the pressure regulator. See PRESSURE REGULATION section of this manual for information regarding gas pressure settings. Note: Before attaching the gas supply line, be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a dirt leg must be incorporated in the piping. The drip leg must be readily accessible and not subject to freezing conditions.
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OPERATING INSTRUCTIONS LIGHTING INSTRUCTIONS WARNING 1. STOP! Read the safety information, (first section) of the If the water heater has been damaged or exposed to flood- Lighting Instruction Plate on the cover. ing, fire, or sooting do not operate the heater until all cor- rective steps have been taken by a qualified serviceman. 2. The main manual gas valve must be closed (turn valve handle clockwise , see fig. below ) and the gas FILLING valve button slide to the far left under the OFF ma
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TO TURN OFF GAS TO APPLIANCE 1. Close main manual gas valve and slide the gas valve button to the OFF position. PRESSURE TAP PRESSURE REGULATOR MANUAL GAS VALVE PEEPHOLE WATER TEMPERATURE CONTROL To adjust water temperature use water flow selector, at heater. For hot water rotate control Knob to the right. GAS VALVE BUTTON Turn Turn counter- PILOT IGNITOR BUTTON clockwise: clockwise: less water more water WATER FLOW - hot - Warm SELECTOR PRESSURE REGULATION The pressure regulator supplied with t
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PREVENTIVE MAINTENANCE PILOT AND MAIN BURNER If the main burners fail to exhibit above characteristics they must be cleaned, either by blowing them off with compressed Check pilot and main burners at least every 12 months for air or by washing them in soap and water and rinsing. the proper flame characteristics. If it proves necessary to wash the main burner assembly the The pilot flame should envelop approximately 10 mm (3/8 following procedure should be used: inch) of tip of thermocouple. 1. T
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8 700 703 038 8 700 203 027 8 703 305 197 NOTE: THE HOT WATER OUTLET HAS BEEN UPGRADED TO A FLEXIBLE TUBE. NOTE POSITIOON OF ASSEMBLY - FLAT COPPER WASHER INSIDE BUSHING - THEN ATTACHED TO MALE END OF FLEX TUBE. *DO NOT OVER TIGHTEN* 9
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INTERIOR COMPONENTS DIAGRAM AND PARTS LIST Nº Description W125 1 Front shell 8705401730 2 Water flow selector handle 8702000218 #N/A 4 Draught diverter 8705505361 5 Heat exchanger 8705406149 6 Temperature limit 8707206040 7Hose 8700703038 8 Main burner NG 8708120011 8 Main burner LPG 8708120301 9 Washer 8700103008 10 Sparking plug 8708107002 11 Pilot burner ( 75 ) 8708105538 11a Filter 8700507055 12 Pilot injector ( 5 ) NG 8708200005 12 Pilot orifice (49) LPG 8748200173 13 Pi
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ASTRAVAN DISTRIBUTORS, LTD. 123 Charles Street North Vancouver, B.C. V7H 1S1 Phone Canada: (604) 929-5488 Phone USA: (206) 860-8448 Web Site: www.astravan.com
