Download  Print this page

Bosch GWH 1000 User Manual

Bosch user guide potable water gwh 1000
Hide thumbs


Quick Links

Standing pilot
Suitable for heating potable water only
Not approved for space heating or preheated water applications
MODEL GWH 1000 P NG - Natural Gas
MODEL GWH 1000 P LP - Liquefied Petroleum (LP) Gas
Warning: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any other
Improper installation, 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.
In the Commonwealth of Massachusettes the
installation must be performed by a licensed
plumber or gas fitter.
instructions should be handed to the user of the
appliance for future reference.
What to do if you smell gas
• Open windows.
• Close gas valve.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire
• Installation and service must be performed by a
qualified installer, service agency or the gas supplier .



  Related Manuals for Bosch GWH 1000

  Summary of Contents for Bosch GWH 1000

  • Page 1 Not approved for space heating or preheated water applications MODEL GWH 1000 P NG - Natural Gas MODEL GWH 1000 P LP - Liquefied Petroleum (LP) Gas Warning: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
  • Page 2: Table Of Contents

    Index Warning Appliance details GWH 1000 P specifications (Technical data) Unpacking the GWH 1000 P heater General rules to follow for safe operation Dimensions and installation clearances Installation instructions Introduction Proper location for installing your heater Heater placement and clearances...
  • Page 3: Appliance Details

    GWH 1000 P specifications (Technical data) Approved in US/Canada Capacity GWH 1000 P: 2.6 GPM Maximum output GWH 1000 P: 58 400 Btu/hr Maximum input GWH 1000 P: 74 900 Btu/hr Efficiency in % Recovery efficiency 78% Min. Output GWH 1000 P: 23 906 Btu/hr Gas Requirement Gas connection (inches) - ½”...
  • Page 4 Please complete and return the enclosed product registration card. The GWH 1000 P is not approved or designed for: • Manufactured (mobile) homes, RV's or boats • Heating or other recirculating/pumping applications* • Solar/preheat backup or high temperature booster •...
  • Page 5: Dimensions And Installation Clearances

    SIDES BOTTOM (C) Fig. 4 Minimum clearances 6 720 608 124 Table 1 Dimensions in inches (mm) Model GWH 1000 12 inches (306 mm) 4 inches (100 mm) 0 inches 4 inches (100 mm) 12 inches (306 mm) Dimensions inches...
  • Page 6: Heater Placement And Clearances

    Heater placement and clearances The GWH 1000 P is design certified for installation on a combustible wall (see 3.4 Mounting installation) provided the wall is not covered with carpet or other fabric material.
  • Page 7: Mounting Heater

    Fig. 5. Incandescent particle tray Fig. 5 Incandescent particle tray illustration Mounting heater. The GWH 1000 P is design certified for mounting on a wall. Warning: B Do not install this appliance on a carpeted wall.
  • Page 8 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.
  • Page 9 B An approved gas vent connector must be attached to the top of the water heater and rise vertically at least 12" before entering into an approved gas vent connector elbow.
  • Page 10 Masonry chimney Masonry chimneys shall be built and installed in accordance with NFPS 211 or local codes. A minimum 4" diameter gas vent pipe (metal double wall Type B), or an approved clay flue liner or a listed chimney lining system must be used when venting into a naturally drafting, internal masonry chimney.
  • Page 11 Fig. 12 Installation of Gas Pressure Regulator Note: The GWH 1000 P comes with a gas pressure regulator. Failure to install or altering the gas pressure regulator will be a violation of CSA certification of the unit.
  • Page 12 Follow boxed numbers for piping just one GWH 1000 P (example: ¾” B.I. Natural Gas pipe for 20 ft (6. 1 m). will handle 190,000 btu’s (55.7 kWh). For multiple appliances combine the total btu input load and then refer to applicable chart below.
  • Page 13: Measuring Gas Pressure

    B Record static gas pressure reading on back page of manual. Operating pressure test B Turn on all hot water taps served by the water heater. B Set flow control knob fully clockwise. B Set slide control to the right.
  • Page 14: Recirculation Application

    A timed or thermostatically controlled operation of the pump is commonly done. The GWH 1000 P should be plumbed in line before the mini-tank water heater. Contact Bosch Water Heating if further instruction is needed.
  • Page 15: Lighting Instructions

    Note: If main burner should fail to ignite, make sure pilot is burning. If not, repeat lighting steps. Note: The GWH 1000 P operates in two modes. See SETTING THE WATER TEMPERATURE. To turn off appliance B Slide the gas valve button all the way to the left and turn off the installer supplied manual gas shutoff on the supply line to the heater.
  • Page 16: Draining Water From Heater

    ensure that the hot water temperature will remain steady, although the water flow demand might vary. The output temperature can be adjusted with either the temperature adjustment knob or the gas control slide. Temperature adjustment knob The temperature adjustment knob on the front bottom of the heater (see Fig.
  • Page 17: Maintenance And Service

    The warranty does not cover failures improper maintenance. The GWH 1000 P 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 assembly and flame ( 5.3)
  • Page 18: Main Burners

    Check for vent assembly blockage or combustion air blockage on the underside of the unit. Mineral scale build-up The GWH 1000 P, when operated at lower temperatures settings, does not accumulate mineral build-up. If however, the heater is used at the higher temperature settings and the water has a high mineral content, periodic descaling may be necessary.
  • Page 19: Troubleshooting

    1. Pilot outage during use typically results from the unit's safety overheat/high limit sensors interrupting the pilot circuit. The GWH 1000 P does not have a thermostat. If inlet water is preheated, the unit will overheat, stopping the flow of gas. Plumb inlet with a cold water line only.
  • Page 20: Burners Do Not Light With Water Flow

    4. The GWH 1000 P is designed to modulate gas flow to the burners when water flow varies. If the water pressure in the home is erratic and the water flow is not consistent while a tap is opened, then the temperature of hot water will fluctuate.
  • Page 21: Water Is Not Hot Enough

    In addition, the water heater's inlet filter should be cleaned and inspected (see chapter 5.2). 5. If water is still too hot, consult service bulletins on to lower outlet temperatures...
  • Page 22: Noise When Heater Is Running

    (see chapter 3.7). 6. The water heater has burners much like a furnace. It is essential that they remain clean and are supplied with adequate air for combustion. If the flames burn yellow or orange, it is strongly recommended that the burners be removed from the unit and cleaned.
  • Page 23: Protecting The Environment

    Protecting the environment Packing The packing box may be fully recycled as confirmed by the recycling symbol Components Many parts in the heater can be fully recycled in the end of the product life. Contact your city authorities for information about the disposal of recyclable products. Saving water resources: B Make sure you close all the taps after any use.
  • Page 24: Interior Components And Diagram Parts List

    Interior components and diagram parts list Interior components Fig. 27 Functional scheme Heat exchanger Burner Temperature adjustment selector Water valve Gas connection Flexible hot outlet Gas control slide Pilot gas tubing Piezo 6 720 608 124...
  • Page 25: Components Diagram

    Components diagram Fig. 28 Components Diagram 6 720 608 124 6720608124-10.1 JF...
  • Page 26: Parts List

    Parts list Item Description Front cover Shield Temp. control knob Draft Diverter Exhaust pipe union Ø128 Angle bracket Cover retaining clip (x10) Heat exchanger Cold water pipe Main burner NG Main burner LP Connector Piezo clip (x10) Sparking plug Pilot gas pipe Tube (x10) Pilot screen Gas valve LP...
  • Page 27: Twelve Year Limited Warranty

    BBTNA shall not be liable for any loss or damage directly or indirectly arising from the use of the hot water heater, or for any consequential damages arising (including damages from water leakage).
  • Page 28 Installer Checklist, to be performed by installer upon installation Serial Number Gas Pressure Reading* Building Water Pressure Average Winter Temperature Average Summer Temperature Installing Company Installer name Address Phone * See Chapter 3.8 and gas pressure table (to be filled out by installer) Installation manual should be left with the owner after the installation is tested and completed BBT NORTH AMERICA Bosch Group...