Bosch AQ 125 BO LP Use And Care Manual Download | Manualshive

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Summary of Contents for AQ 125 BO LP

Page 1: ...fer to this manual For assistance or additional information consult a qualified installer service agency or the gas supplier In the Commonwealth of Massachusetts this product is approved only for seasonal use Installation must be performed by a licensed plumber or gas fitter Upon completion of the installation these instructions should be handed to the user of the appliance for future reference Wh...

Page 2: ...nce 14 4 4 Setting the water temperature 14 5 Maintenance and service 16 5 1 Maintenance intervals 16 5 2 Water valve 16 5 3 Pilot 16 5 4 Main burners 16 5 5 Vent assembly 16 5 6 Mineral scale build up 16 Featuring Piezo Ignition For your safety Do not store or use gasoline or other flammable combustible or corrosive vapors and liquids in the vicinity of this or any other appliance 6 Troubleshooti...

Page 3: ...er heater has a main burner 1 which may come on any time and 2 will ignite flammable vapors Vapors 1 cannot be seen_ 2 are heavier than air 3 go a long way on the floor and 4 can be carried from other rooms to the pilot flame by air currents Installation area at least 18 above the Do not install water heater floor This will reduce but not where flammable products will eliminate the risk of vapors ...

Page 4: ...um flow rate 3 7 GPM 14 I 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 3 4 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 ...

Page 5: ...when you install your heater In the United States The installation must conform with local codes or in the absence of local codes the National Fuel Gas Code ANSI Z223 1 NFPA 54 In Canada The Installation should conform with CGA B149 1 2 INSTALLATION CODES and or local installation codes 2 Carefully plan where you install the heater Proper clearances must be followed 3 The appliance must be isolate...

Page 6: ...ils 2 5 Dimensions and installation clearances 10_ 18 _0 03 Fig 3 Dimensions WATER INLET WATER OUTLET GAS INLET AQ125B 10 JS B Fig 4 Minimum clearances 3ft 4 ft 0 4 ft 1 ft Table 1 Minimum clearances 6 8 716 473 147 ...

Page 7: ... gas line size and plumbing connections are feasible and convenient 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 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 equippe...

Page 8: ...ings D From any adjacent wall or tall 4 ft shruberry E Below a gutter sanitary 3 ft pipework eaves or overhang F Above ground 1 ft From a gas meter gas G regulator electrical box or 3 ft another 125 BO heater Table 2 Clearances 3 4 Mounting installation Front cover should be removed in order to inspect components visually see instructions below To remove front cover Loosen the two screws located o...

Page 9: ...ing screws Use mounting template for proper screw location Locate head of screw in the key hole of the top mounting bracket Vent Safety System The AQ125 BO will shut down if the intake or exhaust louvers on the vent cap are blocked for any reason see troubleshooting section on page 17 8 716 473 147 9 ...

Page 10: ...onnections 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 20...

Page 11: ...EHD 639456 374 325 292 267 EHD Equivalent Hydraulic Diameter The greater the value of EH D the greater the gas capacity of the tubing FOR LP GAS Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases at 11 inches Water Column Inlet Pressure Based on a Pressure Drop of 0 5 Inch Water Column EHD Equivalent Hydraulic Diameter The greater the value of EH D the greater the g...

Page 12: ...y to the water heater Keep water inlet and outlet pipes to no less than 1 2 12 7ram 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 fr...

Page 13: ...uctions 3 8 Electrical connections The 125 BO requires an electrical power supply from a 120VAC 60Hz circuit and must be properly grounded A means for switching off the 120VAC power supply must be provided 8716473147 13 ...

Page 14: ...w this instruction plate 5 Open the sliding viewer window 6 Slide the gas valve button to the right under the mark _ 7 Fully depress gas valve button and light pilot by pushing the button marked _ This step may have to be repeated 8 Observe the pilot flame through the peephole The gas valve button should be held down for at least 15 seconds with pilot burning When the gas valve button is released ...

Page 15: ... As the temperature adjustment knob is turned counter clockwise the output temperature will lower and the activation rate will be raised Turning the knob clockwise will raise the temperature and lower the activation rate Fig 11 Gas control slide button The gas control slide button adjusts temperature by adjusting how much gas is allowed to flow to the burners As the slide is adjusted to the left t...

Page 16: ...ion can be found on our website at www boschhotwater 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 hold ing pilot...

Page 17: ...nd need to be replaced Do not leave jumper connected 6 Have a licensed gas technician verify the proper operation of the thermocouple by measuring the millivoltage from the thermocouple lead to ground The expected reading is 24mVDC or greater 6 4 Burners do not ignite with water flow 1 Verify the pilot is lit 2 Turn temperature adjustment knob all the way clockwise Turn hot water faucet to full on...

Page 18: ...commended is 30 50 psi 2 07 3 45 bar Confirm that the pressure tank is not water logged 5 Service water valve See chapter 5 2 for intervals and instructions 6 ECO overheat sensor tripped due to overheating period Re ignite the appliance 10 minutes later If it happens again contact your service person 6 7 Water is not hot enough 1 Adjust the temperature per chapter 4 4 2 Shut off installer supplied...

Page 19: ...nterior components 7 8 10 2 4 11 Fig 12 Functional scheme 1 Heat exchanger 2 Pilot assembly 3 Burner manifold gas pressure test nipple 4 Main gas burner 5 Pilot gas tubing 6 on off switch 7 Water valve 8 Gas control slide 9 Electronic control box 10 Temperature adjustment selector 8716473147 19 ...

Page 20: ...Interior components and diagram parts list 7 2 Components diagram 1 Fig 13 Components Diagram 20 8 716 473 147 ...

Page 21: ...8 708 107 002 0 14 Strainer 8 700 507 055 0 15 Pipe Pilot gas 8 700 707 320 0 16 Gas valve 8 707 021 090 0 NG 16 Gas valve 8 707 021 091 0 LP 17 Magnetic unit 8 707 201 012 0 18 Piezo igniter 8 708 108 040 0 19 Nut 8 743 301 025 0 20 Cable 8 704 401 023 0 21 Water valve 8 707 002 708 0 22 Cover 8 705 500 101 0 23 Sleeve 8 700 306 114 0 24 Diaphragm C 8 700 503 053 0 25 Wire form spring 8 704 705 0...

Page 22: ...any leaking tap _ Define the temperature you want This way you have the precise water flow needed mixing cold water to regulate temperature will increase the water flow with consequent waste of water For increased safety shut off the appliance from the main water supply if your are staying away from home for a considerable time At below freezing temperatures disconnect the plumbing connections to ...

Page 23: ...ement part s BBTNA will provide ground service delivery for these parts Expedited or upgraded shipping will be charged to the customer Service Labor Costs This warranty does not cover any labor costs associated with service removal or re installation of part s All such costs must be borne by the Purchaser Additionally this warranty does not cover any labor costs associated with service removal or ...

Page 24: ...eft with the owner after the installation is tested and completed 8 digit serial number is located on rating plate on right side panel Static Operating Range if on Well system Replacement Parts available from BBT NORTH AMERICA Bosch Group Bosch Water Heating 340 Mad River Park Waitsfield VT 05673 Phone 800 642 3111 Fax 802 496 6924 www boschhotwater com techsupport boschhotwater com VULCANO Termod...

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