A.O. Smith 120 trough 500 - Manual

A.O. Smith 120 trough 500

A.O. Smith 120 trough 500 – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

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Table of Contents:

  • Page 3 – Phillips head screwdriver
  • Page 5 – EXTERIOR CLEARANCE
  • Page 6 – AIR FOR COMBUSTION; The National Fuel Gas Code also recommends an; EXCESS; AIR; BT
  • Page 7 – DIRECT COMMUNICATION; per kW) of the total input of all equipment
  • Page 8 – VERTICAL DUCTS
  • Page 9 – HORIZONTAL DUCTS; When using horizontal ducts, two
  • Page 10 – INSUFFICIENT MAKE-UP AIR; BACKDRAFT
  • Page 11 – CONTAMINATED AIR
  • Page 12 – GAS PRESSURE REQUIREMENTS; Natural Gas; Maximum Supply Pressure; Supply Gas
  • Page 13 – BTR GAS VALVE; On the top view, we see the pilot solenoid and
  • Page 14 – VENTING; Chimney
  • Page 15 – DRAFT INDUCER; SINGLE UNIT INSTALLATION; When mechanically venting, the following items are required:
  • Page 16 – POWER VENT KITS FOR SIDEWALL VENTING; Water Heater Models
  • Page 17 – BTR SEQUENCE OF OPERATION
  • Page 18 – BTR ELECTRICAL SEQUENCE
  • Page 19 – BTR ELECTRICAL SEQUENCE OF OPERATION
  • Page 20 – TROUBLESHOOTING BTR WATER HEATERS; STEP 1 - TO TEST THE TRANSFORMER
  • Page 21 – HIGH LIMIT, LEFT TERMINAL TEST; Test for 24 VAC between the left high; IF; The meter does not read 24 VAC:
  • Page 22 – TEST HIGH LIMIT RIGHT TERMINAL
  • Page 23 – INSPECT THE DAMPER
  • Page 24 – PC BOARD MOTOR TEST; Check for 24 VAC between the two motor lead; 4 VAC is not present:; Service Switch
  • Page 25 – THERMOSTAT TEST; Set the thermostat to call for heat.; Replace the thermostat
  • Page 26 – DAMPER INPUT TEST
  • Page 27 – TEST DAMPER OUTPUT; On a call for heat, the damper relays receives; Replace the PC board
  • Page 28 – EFFIKAL DAMPER; The heater harness wires still serve the same function:; Adapter; Effikal Control Cover (Photo of kit mounting)
  • Page 29 – HARNESS CHART
  • Page 30 – STEP B
  • Page 31 – TROUBLESHOOTING THE EFFIKAL STYLE DAMPER
  • Page 32 – TROUBLESHOOTING THE EFFIKAL STYLE DAMPER (continued)
  • Page 33 – WIRE HARNESS TEST; Test for 24 VAC between terminal 24V on the IID
  • Page 34 – IID MODULE TEST; Using a multimeter, test for; The meter does read 24 VAC:
  • Page 35 – PILOT SPARK TEST; Visually check for spark at the pilot assembly.
  • Page 36 – PILOT VALVE - OHM TEST; If pilot assembly is sparking but no pilot flame; Replace gas valve
  • Page 37 – PILOT VALVE TEST – BTR 500 ONLY; PILOT VALVE TEST – BTR 500 ONLY.
  • Page 38 – MAIN BURNER TEST; Visually check for main burner.; The main burner ignites:
  • Page 39 – FLAME RECTIFICATION; STEP 16. FLAME RECTIFICATION; Check wire connections
  • Page 41 – MAIN GAS VALVE CHECK; Disconnect wires from gas valve TH and TR; The meter reads ‘O’ or infinity
  • Page 42 – MAIN GAS VALVE COIL CHECK; STEP 18B. MAIN GAS VALVE COIL CHECK – BTR 500 ONLY
  • Page 43 – BTR WIRING DIAGRAM - NATURAL AND PROPANE GAS; Honeywell Ignition System (110 – 109 Series)
  • Page 44 – GENERAL SERVICE CHART
  • Page 45 – GENERAL QUESTIONS AND ANSWERS
  • Page 51 – PARTS LIST FOR BTR Models 120 Through 500(A)
  • Page 52 – COMPONENT PART INFORMATION; NAME
  • Page 53 – BTR SERVICE CHECKLIST
  • Page 55 – COMMENTS
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Summary

Page 3 - Phillips head screwdriver

BTR TANK TYPE HEATERS SERVICE HANDBOOK A.O. Smith Water Products Service Handbook Irving, Texas ©2000 Training Department 2 Qualifications: Installation or service of this water heater requires ability equivalent to that of a licensed tradesman in the field involved. Plumbing, air supply, venting, g...

Page 5 - EXTERIOR CLEARANCE

BTR TANK TYPE HEATERS SERVICE HANDBOOK A.O. Smith Water Products Service Handbook Irving, Texas ©2000 Training Department 4 EXTERIOR CLEARANCE This illustrates the exterior roof clearances for BTR units with natural draft venting. Thevent shall extend at least 3 feet above the highest point where it...

Page 6 - AIR FOR COMBUSTION; The National Fuel Gas Code also recommends an; EXCESS; AIR; BT

BTR TANK TYPE HEATERS SERVICE HANDBOOK A.O. Smith Water Products Service Handbook Irving, Texas ©2000 Training Department 5 AIR FOR COMBUSTION 10 CUBIC FEET OF AIR PER 1,000 BTU Stoichiometric or theoretical complete combustion requires 10 cubic feet of air per 1000BTUH input of the gas input. The N...

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