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Bosch Appliances 125X LP - page 1
W ARNING : Improper inst allation, adjustment, alteration, service or maintenance 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 . Upon completion of the installation, these instructions should be handed to the user of the applian ...
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Bosch Appliances 125X LP - page 2
2 Principle of Operation: When a hot water faucet is opened, the water flow through the heater causes the gas valve to open. At the same time a microswitch is activated which sends a spark to the pilot. The flame sensor confirms the pilot has been lighted and allows the first two burners to come on. The flame sensor confirms correct activation and ...
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Bosch Appliances 125X LP - page 3
3 MINIMUM INST ALLA TION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MA TERIALS FOR ALCOVE OR CLOSET INST ALLA TIONS FRONT VIEW SIDE VIEW AQUAST AR MODEL 125X D870_072 M ODE L 125 X T O P ( A ) 12" FRON T ( B ) 4" BAC K 0 " SI D ES 4 " FL OOR ( C) 1 2" * F L UE D I AMET ER 5 " * Some local codes require 18” in ga ...
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Bosch Appliances 125X LP - page 4
4 GENERAL RULES TO FOLLOW FOR SAFE OPERA TION 1. Y ou should follow these instructions when you install your heater . In the United S tates: The installation must conform with local codes or , in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFP A 54. In Canada: The Installation should conform with CGA B149.(1,2) INST ALLA TION ...
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Bosch Appliances 125X LP - page 5
5 Louvers, grills and screens have a blocking effect. If the effective free area is not known, increase the sizes of your openings by 75% if your louvers are wood and by 30% if your louvers are metal. Refer to the National Fuel Gas Code for complete information. In buildings of tight construction all air should be taken from outside. CLEARANCES The ...
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Bosch Appliances 125X LP - page 6
6 Fig. 2 - Incandescent Particle T ray Illustration at least 1/4 inch for every foot of its horizontal length. Keep the horizontal section short and avoid too many elbows. T o check the draft: Close all doors and windows to the outside. Turn on all appliances that force air out of the building. These include all exhaust/ventilation fans, furnaces, ...
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Bosch Appliances 125X LP - page 7
7 GAS CONNECTIONS and Gas Regulator Before connecting the gas supply , check the rating plate on the right side of the front cover to be sure that the heater is rated for the same gas to which it will be connected. In the United States: The installation must conform with local codes or , in the absence of local codes, the National Fuel Gas Code ANS ...
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Bosch Appliances 125X LP - page 8
8 OPERA TING INSTRUCTIONS 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 . Open a hot water faucet to permit the water to fill the heater and the piping and to eliminate the air trapped in the system Close the hot water faucet after the water f ...
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Bosch Appliances 125X LP - page 9
9 The position you select on the temperature adjustment knob will depend on the temperature of the incoming water (50 ° F is average in the U.S.). In warm weather regions where the incoming cold water is generally warmer , or during the hot weather months in some other areas a midway setting on the temperature adjustment knob would produce a tempe ...
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Bosch Appliances 125X LP - page 10
10 MAINTENANCE AND SERVICE REVIEW MAINTENANCE T ABLE ON THE BACK OF THIS MANUAL Approximately once a year , the AquaS tar should be checked and cleaned. T o remove the front cover , first remove the incandescent particle tray , then pull of f the temperature adjustment knob and unscrew and remove the plastic collar . Pull main cover out toward you ...
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Bosch Appliances 125X LP - page 11
11 NO SP ARK A T THE PILOT 1. On/Off switch is not ”On” (Position I ). The On/Off switch is located behind the flipdown cover plate on the front panel strip. See fig. 9. 2. Water flow is not sufficient to activate heater . W ater flow rate at faucet is below minimum flow needed to activate heater . When temperature adjustment knob is turned all ...
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Bosch Appliances 125X LP - page 12
12 Fig. 13 - Electrical wiring diagram E661_002 WA TER IS NOT HOT ENOUGH 1. T emperature selection too low. Change the setting. T urn the temperature adjustment knob clockwise (to the right). Note: This will decrease the activation flow rate. 2. W ater flow through the heater is higher than the capacity of the AquaStar to heat it Reduce the flow de ...
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Bosch Appliances 125X LP - page 13
13 5 11 1 4 9 10 3 12 2 6 7 8 Fig. 14 - Diagram of AquaStar 125 X 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. Electronic control box 8. Battery box 9. on/of f switch 10. T emperature adjustment selector 1 1 . Microswitch 12. Gas inlet gas pressure test nipple ...
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Bosch Appliances 125X LP - page 14
14 Fig. 15 - INTERIOR COMPONENTS DIAGRAM AND P ARTS LIST ...
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Bosch Appliances 125X LP - page 15
15 Fig. 15 INTERIOR COMPONENTS DIAGRAM AND P ARTS LIST 125X 1 Front cover ¤ 8 705 421 255 2 T emperature adjustment knob comp. ¤ 8 702 000 219 3 T emperature adjustment knob ¤ 8 702 000 1 1 1 4 W ater connection gasket ¤ 8 710 103 043 5 Draught diverter ¤ 8 705 505 354 6 Heat exchanger ¤ 8 705 406 235 7 Hot water pipe ¤ 8 700 705 556 8 W ash ...
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Bosch Appliances 125X LP - page 16
0 1 e g a p e e s E L B A T E C N A N E T N I A M R A E Y Y R E V ES R A E Y 2 Y R E V ES R A E Y 5 - 3 Y R E V E E V L A V R E T A W E T A C I R B U L † E V L A V R E T A W D L I U B E R † N E E R C S R E T L I F R E T A W T C E P S N I † Y L B M E S S A T O L I P T C E P S N I † Y L B M E S S A T N E V T C E P S N I † R E N R U B N I A ...
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