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Appliance details 2 Appliance details Dimensions 2.1 GWH 1600 PS specifications (Technical data) • Depth (in): 8 ¾” (222 mm) • Width (in): 18 ¼” (463 mm) Approved in US/Canada • Height (in): 29 ¾” (756 mm) Capacity • Weight: 44 lb (20 kg). GWH 1600 PS: 4.3 GPM Gas types Maximum output Natural Gas. GWH 1600 PS: 96,600 Btu/hr LP Gas Maximum input Safety devices GWH 1600 PS: 117,000 Btu/hr • Flame failure device (ionization thermocouple) Efficiency in % • Pressure relief valve (supplied with heate
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Installation instructions 3 Installation instructions 3.1 Introduction Warning: The heater must be isolated from the gas supply piping system Please follow these instructions. Failure to follow during any pressure testing of that instructions may result in: system at test pressures equal to or B Damage or injury. more than 0.5 psig. B Improper operation. B Loss of warranty. Warning: Place the heater in a location If you are unable to perform the tasks required to install where water leaks will d
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Installation instructions 3.5 Combustion air requirements The AquaStar water heater holds cold water in its copper heat exchanger and water valve when not in use. Because of this, any cold air that comes down through the unit's vent pipe is capable of freezing these components. This installation manual specifies the minimum vertical vent pipe height and the amount of combustion air required for this unit. When all requirements are followed, the unit will operate properly and safely. However, the
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Installation instructions B Install a union when connecting gas supply. 3.7 Gas piping & connections B Attach the supplied appliance regulator to the inlet Before connecting the gas supply, check the rating gas pipe. plate sticker on the right side of the heater to be sure B The minimum diameter required for any appliance that the heater is rated for the same gas to which it will connector used is ¾”. be connected. In the United States: The installation must conform with B National Fuel Gas Code
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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 drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Copper tubing is prohibited for use with Natural Gas in the Commonwealth of Massachusetts and not recommended elsewhere. Follow boxed numbers for piping just one GWH 1600 PS (example: ¾” B.I. Natural Gas pipe for 20 ft (6.1m). will handle 19
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Operation instructions 3.10 Recirculation application 4 Operation instructions Since recirculation through tankless water heater is not permissible, the following drawing is provided to outline 4.1 For your safety read before a proper recirculation application using the Aquastar operating your water heater water heater with an Ariston tank water heater. This schematic is for illustration only and must not be used Warning: If you do not follow these for actual installation without appropriate en
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Operation instructions - If pilot does not stay lit, repeat all steps. 4.2 Lighting instructions - If pilot will not stay lit after several tries, push the gas B STOP! Read the previous safety information. valve off button ( ) all the way in and call service B The gas valve must be turned off by pushing the gas technician or gas supplier. valve off ( ) button. B When lit, depress the on ( ) button. The heater will now fire at minimum power when water is drawn at a rate greater than the required
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Maintenance and service 5 Maintenance and service the water valve. Remove heat exchanger piping 5.1 Maintenance intervals connected to the right and left side of water valve. Loosen the two set screws (Fig. 27, num. 36) at the top Warning: Failure to perform of the water valve where it connects to the gas valve. If recommended maintenance may result the set screws are seized, STOP and call Bosch tech in complete failure of the unit over time. support before proceeding. Forcing and snapping The
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Maintenance and service • 8. Place new or cleaned pilot orifice back on top of 5.3 Pilot pilot tube. Inspecting pilot • 9. Set pilot bracket on top of the pilot tube. The pilot should burn with a clean sharp blue flame. The • 10. Begin to hand thread the 8 mm nut to the pilot flame should fully engulf the tip of the thermocouple. If bracket being sure not to cross thread. Once started it does not, clean the pilot assembly using the tighten pilot bracket to front of burners with both procedure be
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Maintenance and service 6. Using a 3rd line (C) from the descaling reservoir, connect to the inlet side 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 tight." 8. Fill tank with descaling solution so lines inside are submersed. We recommend a straight white vinegar solution. If using a commercial descalant, refer to manufacturer's instructions on dilution with water. 9. Operate the circulating pump. 10. Make
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Troubleshooting 6 Troubleshooting electromagnet connection is 5mm nut from the 6.1 Introduction thermocouple which screws into a larger 24mm nut. Many of the questions customers ask regarding Tighten both nuts snugly but do not over tighten. operation of this unit can be answered by following the 5. Pilot flame should be blue in color and completely troubleshooting steps as outlined below. Visit our web engulfing the tip of the thermocouple. If not, have a site at www.boschhotwater.com for more
