American Water Heater BCG3 Instruction Manual

American Water Heater BCG3 Instruction Manual

Low nox series 108 commercial gas water heaters installation, operation, service, maintenance, limited warranty
Table of Contents

Advertisement

www.americanwaterheater.com
American Water Heater
Johnson City, TN 37605
Low Lead Content
WARNING: If the information in these
instructions 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 vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
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 department.
Installation
performed by a
service agency or the gas supplier.
Thank you for buying this energy efficient water heater.
We appreciate your confidence in our products.
place these instructions adjacent to heater and notify owner to keep for future reference.
PRINTED 1010
commercial gas water heaters
and
service
must
qualified
installer,
complies with scaQmd low nox rule 1146.2
be

instruction manual

models Bcg3 & aBcg3
low nox series 108
installation - operation - serVice
- maintenance - limited warranty
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
318819-001

Advertisement

Table of Contents
loading

Summary of Contents for American Water Heater BCG3

  • Page 1: Instruction Manual

    - operation - serVice - maintenance - limited warranty www.americanwaterheater.com complies with scaQmd low nox rule 1146.2 American Water Heater Johnson City, TN 37605 Low Lead Content WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.
  • Page 2: Table Of Contents

    taBle of contents SAfe iNSTALLATioN, uSe AND SeRViCe.......... 3 WaTER HEaTER INsTallaTIoN ........... 20-23 GENERal saFETY INFoRMaTIoN ........... 4-5 Water Line Connections ..............20 Precautions ..................4 Water (Potable) Heating and Space Heating..........20 Thermometer (Not Supplied) ..............20 iNTRoDuCTioN ..................6 Water Piping Diagrams ................20 qualifications ..................
  • Page 3: Safe Installation, Use And Service

    safe installation, use and serVice The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard.
  • Page 4: General Safety Information

    general safety information Fire or Explosion Hazard Fire Hazard Do not store or use gasoline or other flammable vapors and For continued protection against liquids in the vicinity of this or any other appliance. risk of fire: Do not install water heater on Avoid all ignition sources if you smell gas.
  • Page 5: Precautions

    general safety information Read and understand this instruction Explosion Hazard manual and the safety messages herein before installing, operating or Overheated water can cause servicing this water heater. water tank explosion. Failure to follow these instructions and Properly sized temperature and safety messages could result in death pressure relief valve must be or serious injury.
  • Page 6: Introduction

    introduction Thank You for purchasing this water heater. Properly installed below) in the field involved. installation skills such as plumbing, and maintained, it should give you years of trouble free service. air supply, venting, gas supply and electrical supply are required in addition to electrical testing skills when performing service.
  • Page 7: Features And Components

    features and components the eliminator (self-cleaning system) electronic ignition control These units include The eliminator (Self-Cleaning System) each heater is equipped with a ignition module. The solid state installed in the front water inlet, See figure 1. The eliminator inlet ignition control (figure 3), ignites the main burner by utilizing a tube can only be used in the front water inlet connection.
  • Page 8: Installation Considerations

    installation considerations rough in dimensions outlet inlet 1 1/2” npt 1 1/2” npt top View figure 5. front View Back View taBle 1. rough-in-dimensions BCG3 70T120 5NoX BCG3 80T150 6NoX BCG3 100T180 6NoX BCG3 95T199 6NoX BCG3 100T199 6NoX BCG3 100T200 6NoX BCG3 100T250 6NoX BCG3 100T275 6NoX BCG3 85T310 6NoX BCG3 85T366 6NoX BCG3 85T390 6NoX model...
  • Page 9: Locating The Water Heater

    installation considerations locating the water heater THe HeATeR muST NoT Be LoCATeD iN AN AReA WHeRe iT WiLL Be SuBJeCT To fReeZiNG. CAUTION LoCATe iT NeAR A fLooR DRAiN. THe HeATeR SHouLD Be LoCATeD iN AN AReA WHeRe LeAKAGe fRom HeATeR oR Property Damage Hazard CoNNeCTioNS WiLL NoT ReSuLT iN DAmAGe To ADJACeNT AReA oR To LoWeR fLooRS of THe STRuCTuRe.
  • Page 10: Installation On Combustible Flooring

    insulation Blanket Breathing Hazard - Carbon Monoxide Gas Do not obstruct water heater air intake with insulating blanket. Gas and carbon monoxide detectors are available. Install water heater in accordance with the instruction manual. Breathing carbon monoxide can cause brain damage or death.
  • Page 11: High Altitude Installations

    Some circulating pumps are manufactured with sealed bearings and do not require further lubrication. Some circulating pumps must be periodically oiled. Refer to the pump manufacturer’s instructions for lubrication requirements. Breathing Hazard - Carbon Monoxide Gas CIRCULATING PUMP WIRING DIAGRAM CIRCULATING PUMP WIRING DIAGRAM Under no circumstances should DISHWASHER LOOP WITH TOGGLE SWITCH...
  • Page 12: Installation Requirements

    installation reQuirements water temperature control and mixing ValVes gas pressure reQuirements All models require a minimum gas supply pressure of 5.2” Water temperature over 125°F (52°C) W.C. The minimum supply pressure is measured while gas can cause severe burns instantly resulting in severe injury or death.
  • Page 13: Dishwashing Machines

    dishwashing machines A properly sized thermal expansion tank must be installed on all closed systems to control the harmful effects of thermal All dishwashing machines meeting the National Sanitation expansion. Contact a local plumbing service agency to have a foundation requirements are designed to operate with water thermal expansion tank installed.
  • Page 14: Contaminated Air

    No valve or other obstruction is to be placed between the regarding the Temperature-Pressure Relief Valve call the toll Temperature-Pressure Relief Valve and the tank. Do not connect free number listed on the back cover of this manual for technical discharge piping directly to the drain unless a 6”...
  • Page 15: Unconfined Space

    Never obstruct the flow of ventilation air. if you have any doubts openings must be installed to provide fresh air for combustion, or questions at all, call your gas supplier. failure to provide the ventilation and dilution in confined spaces. The required size for proper amount of combustion air can result in a fire or explosion the openings is dependent on the method used to provide fresh and cause property damage, serious bodily injury or death.
  • Page 16: Multiple Heater Manifold

    multiple heater manifold outdoor air through one opening figure 13 and tables on pages 17 and 18 should be used for horizontally manifolding two or more heaters. figure 15. Alternatively a single permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, shall be provided. figure 13.
  • Page 17: Outdoor Air Through Two Vertical Ducts

    outdoor air through two Vertical ducts When ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The illustrations shown in this section of the manual are a The minimum dimension of rectangular air ducts shall be not less reference for the openings that provide fresh air into confined than 3 inches.
  • Page 18: Technical Data Venting

    taBle 7. technical data Venting type B gas Vent multiple gas fired tank-type heaters When venting multiple tank type heaters using Type B vent pipe, follow the installation diagram (figure 13) and tables below which give sizing and data based upon NfPA 54/ANSi Z223.
  • Page 19: Technical Data Venting

    taBle 8. technical data Venting (continued) model (a)Bcg3100t2506nox input: 250,000 Btu/hr total Vent height (feet) Vent connector size: 6 inches input Btuh/hr rise Vent connector diameter (inches) 250,000 1 Ft 250,000 2 Ft 250,000 3 Ft number combined input of heaters in thousands of Btu/hr manifold and common Vent diameter (inches) 500,000...
  • Page 20: Water Heater Installation

    water heater installation water line connections t&p ValVe discharge pipe This manual provides detailed installation diagrams (see pages 34-48 of this manual) for typical methods of application for the water heater(s). Explosion Hazard The water heater may be installed by itself, or with a separate Temperature-Pressure Relief Valve storage tank, on both single and two-temperature systems.
  • Page 21: Installation Diagrams

    installation diagrams - top inlet/outlet usage code restrictions The type, size and location of the relief valves must be in use of the top inlet water connection is not permitted on accordance with local codes. The locations of the relief valves installations in the state of North Carolina, due to the material shown in the installation diagrams are typical.
  • Page 22: Heater Wiring

    heater wiring All electrical work must be installed in accordance with the latest version of the National electrical Code ANSi/NfPA No. 70 and must conform to all local code authority having jurisdiction. AN eLeCTRiCAL GRouND iS RequiReD To ReDuCe RiSK of eLeCTRiCAL SHoCK oR PoSSiBLe eLeCTRoCuTioN.
  • Page 23: Gas Piping

    gas piping NeeD NoT Be DiSCoNNeCTeD, BuT muST Be iSoLATeD fRom THe SuPPLY PReSSuRe TeST BY CLoSiNG THe mANuAL GAS SHuToff VALVe. Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for gas piping and dirt leg installation your area.
  • Page 24: Operation

    operation important THE Gas ValVE MusT HaVE BEEN IN THE oFF PosITIoN FoR AT LeAST 5 miNuTeS. This waiting period is an important safety A qualified person must perform the initial firing of the heater. At step. its purpose is to permit gas that may have accumulated in the this time the user should not hesitate to ask the individual any combustion chamber to clear.
  • Page 25: Lighting & Operation Label

    lighting & operation laBel figure 22.
  • Page 26: Checking Venting

    checking Venting The following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation. 1. Seal any unused openings in the venting system. figure 23.
  • Page 27: Checking The Input

    checking the input (3600/15.1) x 1050 = 250,000 (Compare with BCG3 100T250 6NoX model and rating.) for appliance installation locations with elevations above 2000 feet, refer to HiGH ALTiTuDe iNSTALLATioNS section of this Should it be necessary to adjust the gas pressure to the manual for input reduction procedure.
  • Page 28: Maintenance

    maintenance Venting system examine the venting system every six months for obstructions and/or deterioration of the vent piping. Remove all soot or other obstructions from chimney which will retard free draft. remote storage tank temperature control The water temperature in the remote storage tank (if used) is controlled by the storage tank temperature control.
  • Page 29: Anode Rod Inspection

    anode rod inspection the water is no longer hot. Then close the hot water faucet. Connect a hose to the drain valve and terminate it to an CAUTION adequate drain. ensure the drain hose is secured before and during the entire flushing procedure.
  • Page 30: Deliming Solvents

    deliming solVents A. o. Smith recommends the use of uN•Lime for deliming. uN•Lime is a patented food grade acid which is safe to handle Explosion Hazard and does not create the harmful fumes which are associated with other products. Flammable hydrogen gases uN•Lime may be obtained from your dealer, distributor or A.
  • Page 31: Ignition Module System

    8. Remove the cleanout cover and place a clean plastic bucket Note: To check uN•Lime for continued use, place some scale next to the cleanout opening. or white chalk in a glass with a small amount of uN•Lime. if the material is vigorously dissolved by the uN•Lime, it can be Partially open the cold water inlet valve to allow time to reused;...
  • Page 32: Service

    serVice The installer may be able to observe and correct certain problems electrical serVicing which may arise when the unit is put into operation. HoWeVeR, it is recommended that only qualified service agents, using LABeL ALL WiReS PRioR To DiSCoNNeCTioN WHeN SeRViCiNG appropriate test equipment, be allowed to service the heater.
  • Page 33: Sequence Of Operation Flow Chart

    seQuence of operation flow chart Description of this flow chart can be found in the “SequeNCe of oPeRATioN” section found on page 23. figure 29...
  • Page 34: Operational Checklist

    operational checklist remedy complaint cause user serVice agent *Water not hot enough Thermostat set too low. Set thermostat dial to a higher temperature upper and/or lower temperature Call service agent Check continuity and resistance (ohms) probe out of calibration. of upper and lower temperature probes. Replace probes if out of specification.
  • Page 35: Water Piping Diagrams

    water piping diagrams...
  • Page 45 STORAGE TANK...
  • Page 48 STORAGE TANK...
  • Page 50: Manifold Kits

    MANIFOLD KITS TWO UNIT MANIFOLD KIT (PART NO. 9003426205) MODEL DIMENSION "A" BCG3 70T120 5NOX 63" BCG3 80T150 6NOX 68" BCG3 100T180 6NOX 72" BCG3 95T199 6NOX 72" BCG3 100T199 6NOX 72" A/BCG3 100T200 6NOX 72" A/BCG3 100T250 6NOX 72" A/BCG3 100T275 6NOX 72"...
  • Page 51: Notes

    notes...
  • Page 52 notes...
  • Page 53 notes...
  • Page 54: Notes

    notes...
  • Page 55: Warranty

    THRee years after initial installation, the warrantor will supply a complete new American water heater of equivalent size and current model.
  • Page 56 Box 1597, 500 princeton road johnson city, tn 37605 Copyright © 2010 A.o. Smith Corporation, All rights reserved.

This manual is also suitable for:

Abcg3Low nox 108 series

Table of Contents