Page 2 - Index; The heater must be isolated
6 720 606 518 2 Index Index 1 Warning 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...
Page 3 - Appliance details; specifications
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 P...
Page 4 - heater; Rating plate sticker; is not approved or designed
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 thecorrect heater for your type of Gas - Propane orNatural Gas. Identification labels are found on the shipping box, and on the rating plate sticker ...
Page 5 - Dimensions
6 720 606 518 Appliance details 5 2.4 Dimensions Fig. 3 Dimensions in Inches and (mm) 4 Heat exchanger 5 Burner 11 Water valve 20 Gas connection 36 Front cover 37 Holes for hanging on wall 38 Exhaust pipe union 39 Draft diverter 40 Gas valve 49 Observation window 50 Piezo Igniter button 51 Off butto...
Page 6 - Installation instructions; Introduction; Minimum clearances; DO NOT INSTALL IN AN
6 720 606 518 6 Installation instructions 3 Installation instructions 3.1 Introduction Please follow these instructions. Failure to followinstructions may result in: B Damage or injury. B Improper operation. B Loss of warranty. If you are unable to perform the tasks required to installthis heater pr...
Page 7 - Mounting Heater; Remove cover and inspect.; Loosen the fixing screw, bottom of the front cover.; Install incandescent particle tray.; Incandescent particle tray illustration
6 720 606 518 Installation instructions 7 3.4 Mounting Heater Remove cover and inspect. B Loosen the fixing screw, bottom 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 fr...
Page 8 - Combustion air requirements; Appliances located in unconfined spaces:
6 720 606 518 8 Installation instructions 3.5 Combustion air requirements The AquaStar water heater holds cold water in itscopper heat exchanger and water valve when not in use.Because of this, any cold air that comes down throughthe unit's vent pipe is capable of freezing thesecomponents. This inst...
Page 9 - Venting; Horizontal venting; Flat roof
6 720 606 518 Installation instructions 9 3.6 Venting B Minimum vent pipe diameter: 5 inches B Minimum vertical vent height: 6 feet, with no elbows B Establish 12 inch rise before any elbow The heater must be vented to the outside following alllocal ordinances and specifications for installing a gas...
Page 10 - Fig. 12 Masonry chimney; Table 2
6 720 606 518 10 Installation instructions Masonry chimney Masonry chimneys shall be built and installed inaccordance with NFPS 211 or local codes. A minimum5" diameter gas vent pipe (metal double wall Type B),or an approved clay flue liner or a listed chimney liningsystem must be used when vent...
Page 11 - Gas piping & connections; Fig. 13 Installation of Gas Pressure Regulator; Note; GAS LINE SIZING
6 720 606 518 Installation instructions 11 3.7 Gas piping & connections Before connecting the gas supply, check the ratingplate sticker on the right side of the heater to be surethat the heater is rated for the same gas to which it willbe connected.In the United States: The installation must con...
Page 12 - FOR NATURAL GAS; Maximum Capacity of Semi-Rigid copper Tubing in; FOR LP GAS
6 720 606 518 12 Installation instructions FOR NATURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure dropof 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands.Copper tubing is prohibite...
Page 13 - Measuring gas pressure; Connecting manometer; Shut off gas with installer supplied shutoff valve.; Static pressure test; Operate all other gas appliances at maximum output.; Operating pressure test; Turn on all hot water taps served by the water heater.; Water connections; Connecting the pressure relief valve (PRV)
6 720 606 518 Installation instructions 13 3.8 Measuring gas pressure B Proper gas pressure must be verified uponinstallation. Connecting manometer B Shut off gas with installer supplied shutoff valve. B Remove front cover and locate inlet gas pressuremeasuring tap above the regulator, see Fig. 15. ...
Page 14 - Recirculation application; Fig. 17 Recirculation application; Operation instructions
6 720 606 518 14 Operation instructions 3.10 Recirculation application Since recirculation through tankless water heater is notpermissible, the following drawing is provided to outlinea proper recirculation application using the Aquastarwater heater with an Ariston tank water heater. Thisschematic i...
Page 15 - Lighting instructions; To turn off appliance
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 smellgas, STOP! Follow “B” in chapter 4.1. If you d...
Page 16 - Calibrating the thermostat; : If the water temperature does not vary when the; : The thermostat's modulation will respond sooner; Winterizing; If there is a risk of freezing, proceed as follows:; it should not be necessary to
6 720 606 518 16 Operation instructions 4.4 Calibrating the thermostat B If water temperature is too high or low, calibratethermostat. B Remove front cover. B Loosen the lock-nut collar above the 22 mm nut tobegin the calibration procedure. A seal of yellowpaint will be broken when it is loosened. S...
Page 17 - Maintenance and service; Maintenance intervals; requires periodic maintenance.; Failure to perform
6 720 606 518 Maintenance and service 17 5 Maintenance and service 5.1 Maintenance intervals The GWH 1600 PS requires periodic maintenance. The below time maintenance intervals should keep the unit operating for many years. Every year B Inspect inlet water filter screen ( 5.2) B Inspect pilot assemb...
Page 18 - Pilot; Inspecting pilot; Fig. 24 Pilot assembly; Main burners; Descaling heat exchanger
6 720 606 518 18 Maintenance and service 5.3 Pilot Inspecting pilot The pilot should burn with a clean sharp blue flame. Theflame should fully engulf the tip of the thermocouple. Ifit does not, clean the pilot assembly using theprocedure below. Cleaning pilot assembly • 1. Shut off gas to heater usi...
Page 20 - Troubleshooting
6 720 606 518 20 Troubleshooting 6 Troubleshooting 6.1 Introduction Many of the questions customers ask regardingoperation of this unit can be answered by following thetroubleshooting steps as outlined below. Visit our website at www.boschhotwater.com for more detailedtroubleshooting. For best resul...
Page 21 - Verify the pilot is lit; Water is too hot
6 720 606 518 Troubleshooting 21 water path, causing the water to over heat which shutsall gas off to the heater. See chapter 5.6.1 for descalinginstructions. 8. If steps 1 through 7 do not correct the problem, thenconfirm that the gas pressure is adequate. Ensure gaspressure is in accordance with m...
Page 22 - Water is not hot enough
6 720 606 518 22 Troubleshooting 6.8 Water is not hot enough 1. Verify gas type indicated in rating sticker located onright-hand side of cover, coincides with the gas typeyou are using. NG is a natural gas unit and LP is forliquid propane. 2. Flow at one particular tap is too great or too manyfixtur...
Page 23 - Protecting the environment; Protecting the; Packing
6 720 606 518 Protecting the environment 23 5. Make sure the water heater is vented properly. Checkfor proper draft and ensure venting is in accordancewith manufacturer's specifications (see chapter 3.6). 6. The water heater has burners much like a furnace. Itis essential that they remain clean and ...
Page 24 - Interior components and diagram parts list; Interior components; Fig. 26 Functional scheme
6 720 606 518 24 Interior components and diagram 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 - Components diagram; Fig. 27 Components Diagram
6 720 606 518 Interior components and diagram parts list 25 8.2 Components diagram Fig. 27 Components Diagram
Page 26 - Parts list; Item; Table 4
6 720 606 518 26 Interior components and diagram 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...
Page 27 - Twelve Year Limited Warranty
6 720 606 518 Twelve Year Limited Warranty 27 9 Twelve Year Limited Warranty General Aquastar water heaters are warranted by theManufacturer (BOSCH) through BBT North America.BBT North America (BBTNA) will furnish a replacementheat exchanger and will furnish a replacement of anyother part which fail...
Page 28 - BBT; NORTH AMERICA
Recycled paper © 2007 BBT NORTH AMERICA CORPORATION, Waitsfield, VT all rights reserved Installer Checklist, to be performed by installer upon installation Serial Number ___ ___ ___ ___ ___ ___ ___ ___ (8 digit serial number is located on rating plate on right side panel) Gas Pressure Reading* Stati...
