Bosch 125B NG User Manual

WARNING: Improper installation, adjustment,alteration, service or maintenance can cause injury orproperty damage. Refer to this manual. For assistanc

10 6 720 607 030GAS LINE SIZING-It is strongly recommended that the Natural Gas pipebe Black Iron pipe the entire distance from the outsidemeter to th

116 720 607 030GAS PIPING, CONNECTIONS and Gas RegulatorBefore connecting the gas supply, check the rating plate on the right side of the front cover

12 6 720 607 030WATER CONNECTIONSInstall the heater centrally in the building if possible andmake hot water piping runs as short as possible When f

136 720 607 030LIGHTING INSTRUCTIONS (as seen on front coverof heater)1. STOP! Read the safety information above on this plate.2. The Gas valve must b

14 6 720 607 030To clean the pilot burner and/ or the pilot orifice : Turnoff the gas at the unit. Remove the cover of the heater. Todo so, pull off

156 720 607 0303. Poor thermocouple connection at the electromagnetNote: Electromagnet is part #8707201012 located on theright side of the gas valve b

16 6 720 607 0305. Crossover in household plumbingThe AquaStar burner activates when there is sufficient waterpressure drop in the AquaStar water valv

176 720 607 030HOT WATER TEMPERATURE FLUCTUATES / UNITDEACTIVATED1. Unbalanced pressure in waterlinesThe added restriction caused by the Aquastar

18 6 720 607 030

196 720 607 030Fig. 12 - Diagram of AquaStar 125 B 1. Heat exchanger 2. Pilot assembly 3. Burner manifold gaspressure test nipple 4. Main gas burn

2 6 720 607 030This well engineered, gas water heater has all the fea-tures a water heater should have:It operates on the principle of heating water i

20 6 720 607 030Fig. 13 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST

216 720 607 030Fig. 13INTERIOR COMPONENTS DIAGRAMAND PARTS LIST 125B1 Cover 8 705 421 0252 Temperature adjustment knob 8 702 000 1113Temperature adjus

22 6 720 607 030LIMITED WARRANTYAquastar06.03GeneralAquastar water heaters are warranted by the Manufacturer(BOSCH) through Controlled Energy Corp. C

236 720 607 030Fig. 14 - Flow chart of Aquastar 125 B

Replacement Parts available from North AmericanDistributorCONTROLLED ENERGY CORP.340 Mad River ParkWaitsfield, Vermont 05673Phone 800-642-3111Fax (802

36 720 607 030MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NONCOMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONSFRONT VIEW SIDE VIEWAQUA

4 6 720 607 030GENERAL RULES TO FOLLOWFOR SAFE OPERATION1. You should follow these instructions when you install yourheater. In the United States: Th

56 720 607 030Fig. 1 - Water heater drain plug WARNING: Flammable materials, gasoline,pressurized containers, or any other items or article

6 6 720 607 030Expansion and contraction of piping due to changing watertemperature in the pipes imparts movement to the heaterwhich, if mounted direc

76 720 607 030Vent pipe connection. WARNING: Do not reduce the vent pipe size. See Fig. 4 for high altitude installationsThe heater must be vented t

8 6 720 607 030MASONRY CHIMNEY: Masonry chimneys shall be built and installed in accordance with NFPS 211 or local codes. A minimum5” diameter gas ven

96 720 607 030To check the draft:Close all doors and windows to the outside.Turn on all appliances that force air out of the building.These inc