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Bosch Appliances GWH 1600 PS manual

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Table of contents for the manual

  • Page 1

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  • Page 2

    6 720 606 518 2 Index Index 1W a r n i n g 2 2 Appliance details 3 2.1 GWH 1600 PS specifications (Technical data) 3 2.2 Unpacking the GWH 1600 PS heater 4 2.3 General rules to follow for safe operation 4 2.4 Dimensions 5 3 Installation instructions 6 3.1 Introduction 6 3.2 Proper location for installing your heater 6 3.3 Heater placement and clear[...]

  • Page 3

    6 720 606 518 Appliance details 3 2 Appliance details 2.1 GWH 1600 PS specifications (Technical data) Approved in US/Canada Capacity GWH 1600 PS: 4.3 GPM Maximum output GWH 1600 PS: 96,600 Btu/hr Maximum input GWH 1600 PS: 117,000 Btu/hr Efficiency in % Recovery efficiency 80% Min. Output GWH 1600 PS: 23,400 Btu/hr Gas Requirement Gas connection (i[...]

  • Page 4

    6 720 606 518 4 Appliance details 2.2 Unpacking the GWH 1600 PS heater This heater is packed securely. Before installing the unit, be certain you have the correct heater for your type of Gas - Propane or Natural Gas. Identification labels are found on the shipping box, and on the rating plate sticker whi ch is located on the right side panel of the[...]

  • Page 5

    6 720 606 518 Appliance details 5 2.4 Dimensions Fig. 3 Dimensions in Inches and (mm) 4 Heat exchang er 5 Burner 11 Water valve 20 Gas connection 36 Front cover 37 Holes for hanging o n wall 38 Exhaust pipe uni on 39 Draft diverter 40 Gas valve 49 Observation window 50 Piezo Igniter button 51 Off button 52 Pilot button 53 On button[...]

  • Page 6

    6 720 606 518 6 Installation instructions 3 Installation instructions 3.1 Introduction Please follow these instru ctions. Failure to follow instructions may result in: B Damage or injury. B Improper operation. B Loss of warranty. If you are unable to perform the tasks required to install this heater properly, please contact a locally licensed plumb[...]

  • Page 7

    6 720 606 518 Installation instructions 7 3.4 Mounting Heater Remove cover and inspect. B Loosen the fixing screw, bott om of the front cover. B Remove the outer cover by pulling it forwards and then lifting upwards, see Fig. 6. B Ensure that the flue terminal is clear. B After inspection, replace front cover. Install incand escent particle tray. B[...]

  • Page 8

    6 720 606 518 8 Installation instructions 3.5 Combustion air requirements The AquaStar water heater holds cold water in its copper heat exchanger and wa ter valve when not in us e. Because of this, any cold air that comes down through the unit's vent pipe i s capable of freezing these components. This installation manu al specifies the minimum[...]

  • Page 9

    6 720 606 518 Installation instructions 9 3.6 Venting B Minimum vent pipe diameter: 5 i nches B Minimum vertical vent he ig ht: 6 feet, with no elbows B Establish 12 inch rise before any elbow The heater must be vented to the outside fol lowing all local ordinances and specifications for in stalling a gas appliance vent or chimney . The heater must[...]

  • Page 10

    6 720 606 518 10 Installation instructions Masonry chimney Masonry chimneys shal l be built and installed in accordance with NFPS 211 or local codes. A minimum 5" diameter gas vent pipe (metal double wall Type B), or an approved clay flue liner or a listed chi mney lining system must be used when vent ing into a naturally drafting, internal ma[...]

  • Page 11

    6 720 606 518 Installation instructions 11 3.7 Gas piping & conne ctions Before connecting the gas suppl y, check the rating plate sticker on the right si de of the heater to be sure that the heater is rated for the s ame gas to which it will be connected. In the United States: The i nstallation must conform with local codes or, in the absence [...]

  • Page 12

    6 720 606 518 12 Installation instructions FOR NA TURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Sp ecific Gravity Gas) Btu num bers given in thousands. Copper tubing is prohibited for use with Natural Gas in the Commonwealt[...]

  • Page 13

    6 720 606 518 Installation instructions 13 3.8 Measuring gas pressure B Proper gas pressure must be verified upon installation. Connecting manometer B Shut off gas with installer suppl ied shutoff valve. B Remove front cover and locate inlet gas pressure measuring tap above the regulator, see Fi g. 15. B Remove screw from test point above the regul[...]

  • Page 14

    6 720 606 518 14 Operation instructions 3.10 Recirculation application Since recirculation through t ankless water heater is not permissible, the followi ng drawing is provided to outline a proper recirculation application us ing the Aquastar water heater with an Ariston tank water heater. This schematic is for illustration only and must not be use[...]

  • Page 15

    6 720 606 518 Operation instructions 15 4.2 Lighting instructions B STOP! Read the previous safety information. B The gas valve must be turned off by pushing the gas valve off ( ) button. Fig. 18 B Wait five (5) minutes to clear out any gas. If you s mell gas, STOP! Follow “B” in chapter 4.1. If you don’t smell gas, go to next step. B The pil[...]

  • Page 16

    6 720 606 518 16 Operation instructions 4.4 Calibrating the thermostat B If water temperature is t oo high or low, calibrate thermostat. B Remove front cover. B Loosen the lock-nut collar above t he 22 mm nut to begin the calibration procedure. A seal of yellow paint will be broken when it is loosene d. See diagram below. Fig. 22 B Turning the 22 m[...]

  • Page 17

    6 720 606 518 Maintenanc e and service 17 5 Maintenance and service 5.1 Maintenance intervals The GWH 1600 PS requires periodic maintenance. The below time maintenance intervals shoul d keep the unit operating for many years. Every year B Inspect inlet water fi lter screen ( 5.2) B Inspect pilot assembly and flame ( 5.3) B Inspect burner assembly ([...]

  • Page 18

    6 720 606 518 18 Maintenance and service 5.3 Pilot Inspecting pilot The pilot should burn with a clean sharp bl ue flame. The flame should fully engulf the tip of the thermocouple. If it does not, cl ean the pilot ass embly using the procedure below. Cleaning pilo t assembly • 1. Shut off gas to heater using installer suppl ied manual gas shutoff[...]

  • Page 19

    6 720 606 518 Maintenanc e and service 19 6. Using a 3rd line (C) from the descaling reservoir, connect to the inlet s ide of circulating pump. Verify there is a filter on the end of the line in the descaling reservoir. 7. Make sure all connections are "hand tigh t." 8. Fill tank with descaling solution so lines inside are submersed. We r[...]

  • Page 20

    6 720 606 518 20 Troubleshooting 6 Troubleshooting 6.1 Introduction Many of the questions customers ask regarding operation of this unit can be answered by following the troubleshooting steps as outl ined below. Visit our web site at www.boschhotwater.com for more detailed troubleshooting. For best results, perform each step before proceeding to th[...]

  • Page 21

    6 720 606 518 Troubleshooting 21 water path, causing the wate r to over heat which shu ts all gas off to the heater. See chapter 5.6.1 for descaling instructions. 8. If steps 1 through 7 do not correct the problem, then confirm that the gas pressure is adequate. Ensure gas pressure is in accordance with manufacturer's specifications (see chapt[...]

  • Page 22

    6 720 606 518 22 Troubleshooting 6.8 Water is not hot enough 1. Verify gas type indicated in rating sticker located on right-hand side of cover, coincides with the gas type you are using. NG is a natural gas unit and LP is for liquid propane. 2. Flow at one particular tap is too great or too many fixtures a re running a t one time . Lower flow to s[...]

  • Page 23

    6 720 606 518 Protecting the environment 23 5. Make sure the water heate r is vented properly. Check for proper draft and ensure venti ng is in accordance with manufacturer's specifications (see chapter 3.6). 6. The water heater has burners muc h like a furnace. It is essential that they remai n clean and are supplied with adequate air for com[...]

  • Page 24

    6 720 606 518 24 Interior components and di agram parts list 8 Interior components and diagram parts list 8.1 Interior components Fig. 26 Functional scheme 1 Heat exchanger 2 Burner manifold gas pressure test nipple 3 Water valve 4 Main gas burner 5 Gas valve[...]

  • Page 25

    6 720 606 518 Interior components and diagram parts list 25 8.2 Components diagram Fig. 27 Components Diagram[...]

  • Page 26

    6 720 606 518 26 Interior components and di agram parts list 8.3 Parts list Item Description Reference 1 Cover 8 705 421 033 2 Cap cover 8 703 304 011 3 Water connection gasket 8 710 103 043 5 Heat exchanger 8 705 406 189 6 Hot water pipe 8 700 705 431 7 Cold water pipe 8 700 705 294 8 Heat exchanger wa sher 8 710 103 045 9 Overheat sensor (ECO) 8 [...]

  • Page 27

    6 720 606 518 Twelve Year Limited Warranty 27 9 Twelve Year Limited Warranty General Aquastar w ater hea ters are warranted b y the Manufacturer (BOSCH) thro ugh BBT North America. BBT North America (BBTNA) will furnish a replaceme nt heat exchanger and will furnish a replacement of any other part which fails in normal us e and service within the a[...]

  • Page 28

    Recycled paper © 2007 BB T NO RTH AM E R IC A C O R P O R A TIO N, W aitsfield, VT all rights reser ved Installer Checklist, to be perfor med by installer upon installation Serial Number ___ ___ ___ ___ __ _ ___ ___ ___ (8 digit serial number is located on rating plate on right side panel) Gas Pressure Reading* Static__________ Operating__________[...]