Instruction/ maintenance manual of the product 125B NGS AquaStar
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WARNING : Improper installation, adjustment , alterat ion, service or maint enance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier .
2 6 720 606 518 This well engineered, gas water heater has been specially designed to operate with incoming pre-heated water: It operates on the principle of heating water instantaneously “on demand”. When a hot water faucet is opened, cold water flows through the coils of the heat exc hanger in the Aquast ar .
3 6 720 606 518 D861_059 M I N I M U M I N S T ALLA TI O N C LE ARAN C E S FR O M CO M B U S TI B LE AN D N ON C OM B U S TI B LE MA TE R IALS FO R AL C OVE OR C L O SET I N S T ALLA TI ON S F RO NT V.
4 6 720 606 518 P RO PE R L OCA TI ON FOR I N ST ALLI NG Y OU R HEA T ER C arefully select the location of your new heater . F or your safety and for proper heater operation, you must provide an abundant supply of combustion air and a proper venting installation.
5 6 720 606 518 WARNING: Flammable materials, gasoline, pressurized containers, or any other items or articles that are pot entially fire hazards must NOT be placed on or adjacent to the heat er . T he appliance area must be kept free of all combustible materials, gasoline and other flammable vapors and liquids.
6 6 720 606 518 Fig. 1 - Mounting the Heater Fig. 2 - Inc andescent Particle T ray Illust ration The incandescent particle tray (shipped loose in the carton with the water heater) must be attached at the bottom of the water heater front cover at the time of installation.
7 6 720 606 518 VENTING V ent pipe connect ion. WARN I NG: Do not reduce the vent pipe size . See Fig . 3 for high altitude inst allations The heater must be vented to the outside following all local ordinances and specifications for installing a gas appliance vent or chimney .
8 6 720 606 518 MASO NRY CH I MN EY : Masonry chimneys shall be built and installed in accordance with N FP S 2 1 1 or local codes . A minimum 5” diameter gas vent pipe (metal double wall T ype B ), or an approved clay flue liner or a listed c himney lining system must be used when venting into a naturally drafting, internal masonr y chimney .
9 6 720 606 518 Fig. 3 – Vent Adaptor for High Altit ude Installat ions 5” X 6” ADAPT O R US E D ON H IG H AL TITU DE T o check t he draft : Close all doors and windows to the outside. T urn on all appliances that force air out of the building .
10 6 720 606 518 GAS CONNECTIONS and Gas Regulator NO TE : T he Aquast ar 1 25 B”S” is supplied wit h a gas pressure regulator t hat must be installed on t he heater before attaching the gas supply line. See figure 5. Failure to install the gas regulator as shown in figure 5 will be a violation of CSA certific ation of t he unit .
11 6 720 606 518 The water heater must be isolated from the gas supply piping system by closing the manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or more than 0.
12 6 720 606 518 O PERA T ING INS T R U C TI ONS Before proceeding with the operation of the heater make sure that the system is filled with water . Open the cold water inlet supply to the heater fully .
13 6 720 606 518 Fig. 8 - Characteristic Pilot Flame 3mm Correct gap between pilot burner tip and piezo electrode tip Piezo Electrode Air screen filter 1 0mm 3/8” Piezo Electrode Thermocouple T o clean t he pilot burner and/ or t he pilot orifice : T urn off the gas at the unit .
14 6 720 606 518 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.
15 6 720 606 518 T o test the thermocouple, disconnect the thermocouple lead to the ECO. Insert a multi-meter probe into the thermocouple lead and attach or hold the other lead to the metal gas valve (DC common). Light the pilot flame and hold button, meter reading should be 24 mVDC or more.
16 6 720 606 518 See specifications on page 2. Unlike storage tank water heaters, the burners of a tankless water heater must be very powerful to heat water instantaneously since they do this only at the time hot water is actually being used. It is therefore imperative that the gas pressure requirement be met exactly .
17 6 720 606 518 1 . Heat exchanger 2. Pilot assembly 3. Burner manifold gas pressure test nipple 4. Main gas burner 5. Pilot gas tubing 6. Gas valve 7 . Piezo igniter 8. Location of pressure tap screw 9. W ater valve 1 0 . Gas inlet gas pressure test nipple 5 1 4 7 9 3 10 6 2 8 Fig.
18 6 720 606 518 A Q 1 25 BS Fig. 1 1 - I NTER IOR CO MP ON ENTS DIAGR AM AN D P ARTS LI ST.
19 6 720 606 518 Fig. 1 1 INTERIOR COMPONENTS DIAGRAM AN D P ARTS LI ST 1 25B S 1 Cov er 8 705 421 033 2 Cap cov er 8 703 304 011 3 Water connection gasket 8 710 103 043 4 Draf t divertor 8 705 5 05 3.
20 6 720 606 518 Fig. 1 2 - Flow chart of Aquastar 1 25 BS.
21 6 720 606 518 LI M ITE D W AR R ANT Y Aquast ar General Aquastar water heaters are warranted by the Manufacturer ( B OSC H) through BB T North America .
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Replacement Parts available: BB T NO RTH AM E R IC A Bosch Group Bosch W ater heating 340 Mad River Park W aitsfield, V ermont 0567 3 Phone 80 0-642-3 1 1 1 Fax (802) 496-6924 www .boschhotwater .com tec hsupport@boschhotwater .com VULCANO T ermodomésticos S.
An important point after buying a device AquaStar 125B NGS (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought AquaStar 125B NGS yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data AquaStar 125B NGS - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, AquaStar 125B NGS you will learn all the available features of the product, as well as information on its operation. The information that you get AquaStar 125B NGS will certainly help you make a decision on the purchase.
If you already are a holder of AquaStar 125B NGS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime AquaStar 125B NGS.
However, one of the most important roles played by the user manual is to help in solving problems with AquaStar 125B NGS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device AquaStar 125B NGS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
