Rheem 834 Series Service Instructions Manual
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Rheem 834 Series Service Instructions Manual

Rheem 834 Series Service Instructions Manual

Hydroelectric instantaneous gas water heaters
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SERVICE INSTRUCTIONS
Instantaneous Gas Water Heaters
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
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834 Series Hydroelectric
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Revision: AA
Issued: Feb 2017
Issued: October 2016
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TM081
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834016N0
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Summary of Contents for Rheem 834 Series

  • Page 1 SERVICE INSTRUCTIONS 834 Series Hydroelectric Instantaneous Gas Water Heaters TM081 Revision: AA Issued: Feb 2017 Issued: October 2016 834012N0 834012P0 834016N0 834016P0 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 2: Table Of Contents

    Adjusting the Gas Valve Gas Regulator ................. 49 COMPONENT REPLACEMENT PROCEDURES ............. 50 DOCUMENT REVISION HISTORY ................... 61 TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 3: Introduction

    Do not modify this appliance. When conducting repairs, the gas train including injector sizes must not be altered in any way. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 4: Model Identification

    Not applicable due to not being connected to an electrical power supply. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 5 SV3 / MASV = Motor Adjustable Solenoid Valve (gas flow rate control) for main burner. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 6: Preventative Maintenance

    DO NOT return the heater to service if any test/check result is outside specifications or if an unsafe condition exists. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 7: Frost Protection & Draining The Water Heater

    For more information refer to the Installation Instructions supplied with the heater. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 8: Wiring Diagram - All Models

    WIRING DIAGRAM – ALL MODELS TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 9: Plumbing Diagrams

    Two Temperature Zones Using a Temperature Limiting Device TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 10: Operation

    TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 11 (hot tap turned off and then turned back on) at which time the heater will restart from step 1. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 12 > 0.5 µA. Normal flame generation is 2 ~ 10 µA (2 µA @ min fire, 10 µA @ max fire). TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 13: Sequence Of Operation Component Diagram

    Water Throttle Valve Flame Sensor Overheat Switch Ignition Rod Seasonal Adjustment Valve TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 14: Operational Flow Chart - All Models

    This is not flow (or hot taps closed) voltage valves a fault TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 15: To Turn The Heater On - Lighting Instructions

    (refer to 'Frost Protection & Draining the Water Heater' procedure on page 7). TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 16: Components And Their Function

    Also refer to 'Ignition Module Flame Rectification Operation' on page 12. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 17 The rating label is located on the right side of the water heater. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 18: Gas Valve

    Min and Max burner pressure adjustment dials.  3.7 VDC rechargeable battery. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 19: Ignition Module

    PRODUCT CHANGES There are no product changes at time of writing. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 20: Fault Finding

    2. Milky coloured water is generally air in suspension and will disperse of its own accord. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 21: Operational & Fault Indication

    Green LED continuous flashing (≤ 3.1 VDC) Green LED will extinguish. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 22: Fault Finding Charts

    Refer to 'Operational & Fault Indication' on page 21 for fault indication fault finding chart indexes. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 23 Does overheat switch trip again? Replace overheat switch. (TEST 2) Heater tests ok. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 24 Fault rectified. persist? Replace gas valve assembly and reinstall original temperature controller. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 25 Correctly adjust ignition rod gap. ‘Component Adjustment correct? Procedures & Checks’ section. Replace ignition module. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 26 Clean or replace burner dirty or partially injectors. blocked? Clean or replace burner. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 27 Does red LED 7 flash Replace temperature controller. fault occur again? Heater tests ok. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 28 (faulty battery charging to go flat? function). Generator and battery charging functions ok. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 29 Unblock or replace blocked heat exchanger. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 30 / flow sensor > 21 Hz? (TEST 14) assembly. Replace temperature controller. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 31 (TEST 10) Replace gas valve assembly. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 32 Heater working ok. Possible previous loss of gas supply or bad gas supply. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 33 Are burner min and Procedures & Checks’ section. max gas pressure settings correctly adjusted? TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 34 Clean or replace burner dirty or partially injectors. blocked? Clean or replace burner. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 35 DIP switches 7 & 8. decreased? Heater tests ok. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 36 TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 37 Repair or replace heat NO – Leak is from heat exchanger exchanger. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 38 TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 39: Fault Finding Tests

    0.87 11.16 5.26 2.69 1.46 0.85 10.72 5.08 2.60 1.42 0.83 TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 40 The following result should be obtained: 8 ohms ± 10%. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 41 1.1 ~ 2.1 VDC. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 42 1.1 ~ 2.1 VDC. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 43 The following result should be obtained when water flow through the heater is > 3 L/m: 1.1 ~ 3.7 VDC. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 44 21 ~ 74 Hz (21 Hz @ 3 L/m, 74 Hz @ full flow rate). TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 45: Component Adjustment Procedures & Checks

    3 MUST be set to OFF (down position) for the water heater to function correctly during normal operation. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 46: Resetting The Overheat Switch

    TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 47: Checking Inlet Gas Pressure

    4. Gently disengage the front panel and pull downward to remove from the water heater. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 48 0.080 0.21 0.088 0.21 Max Setting (kPa) 0.72 1.85 0.74 1.85 TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 49: Adjusting The Gas Valve Gas Regulator

    3 of this procedure to recheck the minimum burner gas pressure. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 50: Component Replacement Procedures

    DIP switches 1, 2 and 3 MUST be set to OFF (down position) for the water heater to function correctly during normal operation. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 51 11. Start heater and check for gas leaks using a soapy water solution. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 52 4. Reassemble in reverse order of above. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 53 15. Purge air from premises hot taps and check for water leaks. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 54 7. Using a shifting spanner, unscrew large hex head nut retaining burner manifold to gas valve. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 55 6. Start heater and check for water leaks. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 56 13. Start heater and check for water leaks. 14. Purge air from premises hot taps. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 57 8. Start heater and check for water leaks. 9. Purge air from premises hot taps. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 58 16. Start heater and check for water leaks. 17. Purge air from premises hot taps. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 59 TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
  • Page 60 3. Start heater and check for water leaks. 4. Purge air from premises hot taps. TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

  • Page 61: Document Revision History

    TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions REV: AA Issued: 22/02/17 This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.

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