Aquastar 125B NGS User Manual

WARNING: Improper installation,adjustment, alteration, service or maintenance can causeinjury or property damage. Refer to this manual. Forassistanc

10 6 720 606 518GAS CONNECTIONS and Gas RegulatorNOTE: The Aquastar 125 B”S” is supplied with a gas pressure regulator that must be installed on the h

116 720 606 518The water heater must be isolated from the gas supply pipingsystem by closing the manual shutoff valve during anypressure testing of th

12 6 720 606 518OPERATING INSTRUCTIONSBefore proceeding with the operation of the heater makesure that the system is filled with water.Open the cold w

136 720 606 518Fig. 8 - Characteristic Pilot Flame3mmCorrect gap between pilotburner tip and piezo electrodetipPiezo ElectrodeAir screen filter10mm3/8

14 6 720 606 518If some burners have yellow flames while others have goodflames, it is likely that dust, lint or spider webs have partiallyclogged the

156 720 606 518To test the thermocouple, disconnect the thermocouple leadto the ECO. Insert a multi-meter probe into the thermocouplelead and attach o

16 6 720 606 518See specifications on page 2. Unlike storage tank waterheaters, the burners of a tankless water heater must be verypowerful to heat wa

176 720 606 518 1. Heat exchanger 2. Pilot assembly 3. Burner manifold gaspressure test nipple 4. Main gas burner 5. Pilot gas tubing 6. Gas val

18 6 720 606 518AQ 125 BSFig. 11 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST

196 720 606 518Fig. 11INTERIOR COMPONENTS DIAGRAMAND PARTS LIST 125BS1 Cover 8 705 421 0332 Cap cover 8 703 304 0113 Water connection

2 6 720 606 518This well engineered, gas water heater has been speciallydesigned to operate with incoming pre-heated water:It operates on the principl

20 6 720 606 518Fig. 12 - Flow chart of Aquastar 125 BS

216 720 606 518LIMITED WARRANTYAquastarGeneralAquastar water heaters are warranted by the Manufacturer(BOSCH) through BBT North America. BBT North Ame

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Replacement Parts available:BBT NORTH AMERICABosch GroupBosch Water heating340 Mad River ParkWaitsfield, Vermont 05673Phone 800-642-3111Fax (802) 496-

36 720 606 518D861_059MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NONCOMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONSFRONT VIEW SIDE

4 6 720 606 518PROPER LOCATION FOR INSTALLING YOURHEATERCarefully select the location of your new heater. For yoursafety and for proper heater operati

56 720 606 518WARNING: Flammable materials, gasoline,pressurized containers, or any other items or articlesthat are potentially fire hazards must NOT

6 6 720 606 518Fig. 1 - Mounting the HeaterFig. 2 - Incandescent Particle Tray IllustrationThe incandescent particle tray (shipped loose in the carton

76 720 606 518VENTINGVent pipe connection. WARNING: Do not reduce the vent pipe size. See Fig. 3 for high altitude installationsThe heater must be ve

8 6 720 606 518MASONRY CHIMNEY: Masonry chimneys shall be built and installed in accordance with NFPS 211 or local codes. Aminimum 5” diameter gas ven

96 720 606 518Fig. 3 – Vent Adaptor for High Altitude Installations5” X 6” ADAPTORUSED ON HIGH ALTITUDETo check the draft:Close all doors and windows