Rheem RTGH-95DVELN-3 Use And Care Manual

Rheem RTGH-95DVELN-3 Use And Care Manual

Super high efficiency condensing tankless water heater

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SUPER HIGH EFFICIENCY CONDENSING
TANKLESS WATER HEATER
USE AND CARE MANUAL
With Installation Instructions
for the Installer
Condensing Direct Vent
199,900 Btu/hr, 180,000 Btu/hr,
157,000 Btu/hr and 120,000 Btu/hr Models
WARNING:
If the information in these instructions is not
followed exactly, a fire or explosion may result,
causing death, personal injury, or property dam-
age.
For Your Safety!
• Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or
any other appliance. To do so may result in an
explosion or fire.
• Installation and service must be performed by
a qualified installer, service agency, or the gas
supplier.
Print 2D
Bar Code
Here
CERTIFIED
®
R
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.
• Do not return to your home until authorized by
the gas supplier or fire department.
Do not destroy this manual. Please read carefully
and keep in a safe place for future reference.
ULTRA
Low NOx
Emissions
ww w. ah r i d i rec t or y. org
SCAQMD Rule 1146.2
AP21820 Rev 04

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Summary of Contents for Rheem RTGH-95DVELN-3

  • Page 1 SUPER HIGH EFFICIENCY CONDENSING TANKLESS WATER HEATER USE AND CARE MANUAL With Installation Instructions for the Installer Condensing Direct Vent 199,900 Btu/hr, 180,000 Btu/hr, 157,000 Btu/hr and 120,000 Btu/hr Models ULTRA Low NOx Emissions ww w. ah r i d i rec t or y. org SCAQMD Rule 1146.2 CERTIFIED ®...
  • Page 2: Table Of Contents

    CONTENTS Important Safety Information Using Your Water Heater Activating the Water Heater �������������������������������������������������51, 52 Safety Precautions ��������������������������������������������������������������� 2 – 8 Setting the Water Temperature �������������������������������������������53 – 56 Product Information WiFi Setup ����������������������������������������������������������������������������������������������������56 Product Information �������������������������������������������������������������������� 8 Recirculation Pump Control �����������������������������������������������57 – 61 Specifications �����������������������������������������������������������������������...
  • Page 3: Important Safety Information

    IMPORTANT SAFETY INFORMATION Water Heater Venting Safety DANGER: D A N G E R • Failure to install and properly vent the water heater to the outdoors as outlined in the “Venting” section of the Installation Instructions in this manual will result in death from fire, explosion, or asphyxiation from carbon monoxide.
  • Page 4 IMPORTANT SAFETY INFORMATION Water Supply Safety DANGERS: CAUTIONS: D A N G E R • WATER TEMPERATURE SETTINGS • This water heater must only be used – Safety and energy conservation with the following water supply system are factors to be considered when conditions: selecting the water temperature –...
  • Page 5 IMPORTANT SAFETY INFORMATION Natural Gas and Liquefied Petroleum Safety DANGERS: WARNINGS: • Never attempt to convert the water heater from natural • The installation of gas piping must comply with local gas to LP or vice versa. The water heater must only utility company requirements and/or in the absence of use the fuel type in accordance with the listing on the local codes, use the latest edition of National Fuel Gas...
  • Page 6 IMPORTANT SAFETY INFORMATION Before operating this water heater, be sure to read and follow the instructions on the label pictured below and all other labels on the water heater, as well as the warnings printed in this manual. Failure to do so can result in unsafe operation of the water heater, resulting in death, personal injury, or property damage.
  • Page 7 IMPORTANT SAFETY INFORMATION Electrical Safety CAUTIONS: DANGER: • Label all wires prior to disconnecting for service. Wiring • Shock Hazard – Make sure the electrical power to the errors can cause dangerous and improper operation. water heater is off to avoid electric shock that will Verify correct operation after servicing.
  • Page 8: Safety Precautions

    IMPORTANT SAFETY INFORMATION General Installation and Maintenance Safety WARNINGS: SAFETY PRECAUTIONS: • This water heater must be installed in accordance Read this manual entirely before installing and/or with these instructions, local codes, utility company operating the water heater. requirements and/or in the absence of local codes, Use this water heater only for its intended purpose as use the latest edition of the American National described in this Use and Care Manual.
  • Page 9 PRODUCT INFORMATION Specifications – Direct-Vent Models Front View Top View 3.358 in 5.500 in (85 mm) (140 mm) 6.331 in (161 mm) 25.157 in 23.661 in (639 mm) (601 mm) 5.740 in (146 mm) 1.555 in (39 mm) 17.717 in (450 mm) Bottom View 5.374 in...
  • Page 10: Specifications

    PRODUCT INFORMATION Specifications English Rating Label The following product information can be found from the rating label on this water heater. A. Model Number B. Serial Number C. Data Bar Code D. Heater Type E. Installation Type F. Type of Gas G.
  • Page 11: Flow Rate Vs Pressure Drop

    PRODUCT INFORMATION The graphic below illustrates the pressure drop across the water heater. Please ensure ample water supply pressure is available to ensure the best performance. Pressure Drop Curve Water Flow Rate (GPM) Temperature Rise Curve RTGH-95DVL-3 RTGH-90DVL-3 RTGH-84DVL-3 RTGH-68DVL-3 Delta T - Temperatur re Rise (°F)
  • Page 12: General Descriptions

    PRODUCT INFORMATION General Descriptions Typical Direct-Vent Water Heater (Shown Without Venting) Built-In Display Power Supply Cord Water Filter Union Manual Gas Manual Gas Supply Line Shut-Off Valve To Hot Water Shut-Off Valve Faucet(s) Relief Union Valve Condensate Pipe* Sediment Trap Cold Water Supply To Suitable Service Valve...
  • Page 13 PRODUCT INFORMATION General Descriptions Typical Outdoor Water Heater (Outdoor Conversion Kit Required - sold separately) WiFi Control & Harness Built-In Display Power Supply Cord Water Filter Union Manual Gas Manual Gas Supply Line Shut-Off Valve To Hot Water Shut-Off Valve Faucet(s) Relief Union...
  • Page 14: Installation Instructions

    INSTALLATION INSTRUCTIONS FOR THE CONTRACTOR...
  • Page 15: Standards Compliance

    INSTALLATION INSTRUCTIONS Standards Compliance This water heater must be installed in accordance Association, 1 Batterymarch Park, MA 02269 as with these instructions, local codes, and utility NFPA 54. company requirements. In Canada, use the latest edition of the CAN/CSA In the United States where local codes are not B149.1 Natural Gas and Propane Installation Code available, use the latest edition of the American and the Canadian Electrical Code, CAN/CSA C22.1,...
  • Page 16: Choosing A Location

    INSTALLATION INSTRUCTIONS Choosing a Location (cont.) 0" min. 12" min. (0 mm) (300 mm) Sealing Plate 0" (0 mm) 1/2" min. 1/2" min. (13 mm) (13 mm) • Every vent or air intake pipe penetration of a floor or ceiling should be sealed. •...
  • Page 17: Product Inspection

    INSTALLATION INSTRUCTIONS Product Inspection Visually inspect the water heater for any possible Verify that all included supplied parts are present as damage. shown. Check the rating plate on the water heater to make sure the water heater was designed to be used with the supplied type of gas (natural or LP).
  • Page 18 INSTALLATION INSTRUCTIONS Water Heater Installation (cont.) NOTICE: The National Fuel Gas Code (NFGC) and CAN/CSA B149.1 mandate a manual gas shut-off valve. See NFGC/B149.1 for complete instructions. Local codes or plumbing authority requirements may vary from the instructions or diagrams provided and take precedence over these instructions. Typical Installation of Direct-Vent Water Heater Wall Plate (Recommended)
  • Page 19 INSTALLATION INSTRUCTIONS Mounting the Water Heater CAUTION: Reinforcement of the wall is required where the wall is not strong enough to hold the water heater. Failure to do so could result in personal injury and/or property damage. The mounting location for the water heater should allow for easy access and operation.
  • Page 20: Venting & High-Altitude Adjustments

    WARNING: following tables have been tested and authorized to Refer to page 16 for required clearances to combustible safely operate with Rheem tankless water heater. materials. Improper clearances can cause explosion or fire Approved Vent Materials, Fittings and Terminations: resulting in death, personal injury, and/or product damage.
  • Page 21 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Vent Lengths Appropriate dip switch adjustment shall be required to allow certain vent length. There are 4 vent Before starting the vent installation, careful planning configuration settings, A-0, A-1, A-2, and A-3 settings should be given to the routing and termination of the at 0-2000 ft (0-610 m) elevation.
  • Page 22 INSTALLATION INSTRUCTIONS Vent Length and High Altitude DIP switch Adjustments Switch Switch 1 2 3 4 1 2 3 4 "MIN" "MAX" button button "ADJUST" button Control Board A-0 setting is default and factory setting. All dip switches are off. Find DIP Switch 1 and 2 located in the top-right SECTION HIGH-ALTITUDE...
  • Page 23 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater The following table shows approximate input rate reduction. Actual input rate reduction may be different at each installation. Setting Vent Size Min Vent Length Max Vent Length 3" 2" 3" 2" Replace the front cover panel on the water heater. 2"...
  • Page 24 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater NOTICES: When the water heater is installed above 2000 ft. (610 m), the settings on the DIP switch located on • It is recommended that the air intake pipe and the control board need to be changed per vent exhaust pipe have a 1/4"...
  • Page 25 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater In the Commonwealth of Massachusetts The Commonwealth of Massachusetts requires compliance 4. INSPECTION. The state or local gas inspector of the with regulation 248 CMR 4.00 and 5.00 for installation of side-wall, horizontally vented, gas-fueled equipment shall through-the-wall vented gas appliances as follows: not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage...
  • Page 26 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater The following charts detail the minimal dimensional information needed to determine the proper location of the vent terminal for direct vent and outdoor tankless water heaters. Horizontal Vent Terminal Location for Other than Direct Vent/Outdoor Heater Inside corner detail 15 ft...
  • Page 27 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Horizontal Vent Termination Location for Direct-Vent Water Heater Inside corner detail 15 ft Fixed closed Operable Fixed closed Operable Regulator vent outlet in the event no regulator is present, H and I can be disregarded.
  • Page 28 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater (cont.) Horizontal Vent Considerations WARNING: – DO NOT terminate vent directly on brick or masonry surfaces. Use rust-resistant, sheet-metal backing plate Moisture in the flue gas will condense as it leaves the vent behind the vent.
  • Page 29 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater (cont.) Wall Plate (recommended) Exhaust Vent Pipe Air Intake Pipe 12” (30 cm) Minimum Upward Slope to Termination Inspection Ceiling Inspection Access Panel Access Panel (Optional) (Optional) Horizontal Vent Installation Cleaner-Primer and Medium-Body Solvent Cement All joints in vent piping must be properly sealed, and WARNING: we recommend using the following material:...
  • Page 30 INSTALLATION INSTRUCTIONS Horizontal Vent Installation (cont.) Fasteners will vary depending on the wall type. For particle board or composite sheathing, use 4 hollow wall anchors. The anchors should be at least 1/8 in. (0.3 cm) in diameter and the appropriate length for the sheathing thickness.
  • Page 31 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater (cont.) Alternative Horizontal Vent Installations Alternative horizontal vent termination kits are commercially available. Please refer to the instruction sheet packaged with the kit for complete installation instructions. Upward Slope to Termination Air Intake Pipe Concentric Vent Exhaust Vent...
  • Page 32 INSTALLATION INSTRUCTIONS Horizontal Vent and Combustion, Air-Inlet Alternate Vent Riser Terminal Installation Read these instructions thoroughly and make sure The vent and combustion air-inlet terminations are you understand all steps and procedures before not included in the equivalency calculations. proceeding with the installation. Complete the installation of the remainder of the vent Determine the locations for the vent and combustion system and attach it to the vent connector fitting on...
  • Page 33 NOTICE: A, B Only Rheem-approved AND ULC S636 approved termination and parts must be used during installation. Maintain the recommended air space clearance to combustible materials and building insulation.
  • Page 34 INSTALLATION INSTRUCTIONS Vertical Vent Terminal Location Optional 12" Min. Air Intake (300 mm) Vent Pipe Through Roof A, B The following chart with diagrams details the minimum dimensional information needed to determine the proper location of the vertical vent terminal for direct-vent indoor tankless water heaters: Location U.S.
  • Page 35 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater (cont.) Standard Vertical Vent Termination Optional Adjustable Roof Flashing Support Clamp Upward Slope Air Intake Exhaust Vent Support Hanger Pipe Pipe...
  • Page 36 INSTALLATION INSTRUCTIONS Alternative Vertical Vent Termination Alternative vertical vent termination kits are commercially available. Please refer to the instruction sheet packaged with the kit for complete installation instructions. WARNING: Under no circumstances should the exhaust pipe and the air intake pipe be connected together. Minimum Clearance 18 inches above roof Concentric Vent Termination Adjustable Roof Flashing...
  • Page 37: Water Quality/Supply

    Flush the water heater’s heat exchanger regularly. or failures resulting from water conditions that are Rheem offers a flush kit and isolation valves to help not in accordance with the specifications in the table remove scale build up. (See below) below.
  • Page 38 INSTALLATION INSTRUCTIONS Thermal Expansion Determine if a check valve exists in the inlet water pressure increase can quickly reach the safety line. Check with your local water utility company. setting of the relief valve, causing it to operate It may have been installed in the cold water line as during each heating cycle.
  • Page 39 INSTALLATION INSTRUCTIONS Water Supply Installation NOTICE: • Use only Teflon tape on all COLD and HOT water connections. • If the water flow resistance of a showerhead is too high, the burner in the water heater will fail to ignite. Keep all showerheads clean from debris that could cause additional pressure drop.
  • Page 40 INSTALLATION INSTRUCTIONS Water Piping Arrangement With Service Valve Kit Service valve kits can attach to all tankless water heater systems. All kits include two full- port isolation valves to be used in the COLD Pressure Pressure Relief Valve Relief Valve and HOT water lines.
  • Page 41: Condensate

    INSTALLATION INSTRUCTIONS Hot and Cold Pipe Insulation Installation WARNINGS: For increased energy efficiency, use pipe insulation as shown in the diagram. Insulate the pipes all the • When pipe insulation is not rated for the appropriate way to the top. DO NOT cover any drain or pressure- weather conditions, install electric heat tracing or relief valve(s).
  • Page 42: Gas Supply

    INSTALLATION INSTRUCTIONS Gas Supply Gas Supply System Gas Piping WARNING: Pipe-Sizing Procedure – The gas supply system must be properly sized to ensure the proper DO NOT attempt to convert this water heater for use with operation of this tankless water heater as well as all a different type of gas other than the type shown on the the gas appliances on the system.
  • Page 43 INSTALLATION INSTRUCTIONS Gas Supply Determining the required pipe size. Final Considerations The gas system is designed to operate at a certain If this water heater is replacing an existing water maximum pressure drop. A pressure drop greater heater, it is important to verify the capacity of the gas than what is permissible can cause operational system.
  • Page 44 INSTALLATION INSTRUCTIONS Gas Supply This is an example, in US, refer to current National Fuel Gas Code, NFPA 54 for correct pipe sizing chart, and in Canada, refer to current Natural Gas and Propane Installation Code CAN/CSA B149.1. Table 2 - Pipe-Sizing - Natural Gas Table 3 - Pipe-Sizing - Natural Gas Schedule 40 Metallic Pipe (Black Iron) Schedule 40 Metallic Pipe (Black Iron)
  • Page 45 INSTALLATION INSTRUCTIONS Gas Supply Gas Supply Installation Install the manual gas appliance shut-off valve to the Using the proper-size piping, fittings, and gas connection at the water heater. components, build the gas supply line to the water heater. NOTICE: The gas supply line should be a minimum of 3/4-in. (1.9-cm) black steel pipe or other approved gas piping material.
  • Page 46 INSTALLATION INSTRUCTIONS Gas Supply Leak Testing WARNING: Never use an open flame to test for gas leaks, because death, personal injury, and/or property damage can result. The water heater and its gas connections MUST be leak- tested at normal operating pressures before the unit is placed in operation.
  • Page 47: Electrical Wiring

    DO NOT install this water heater at elevations above 2000 ft. (610 m) without the proper adjustments. Please contact your installer, local gas supplier, place of purchase, or the Rheem Customer Service phone number listed in the “Call for Assistance” section. Electrical Wiring DANGER: DO NOT use 3-prong to 2-prong adapters.
  • Page 48 INSTALLATION INSTRUCTIONS Electrical Wiring Wiring Diagram...
  • Page 49: Insulation Blankets And Installation Precautions

    INSTALLATION INSTRUCTIONS Insulation Blankets In general, insulation blankets for external use on gas The manufacturer’s warranty does not cover any water heaters are not necessary. The purpose of an damage or defect caused by insulation, insulation insulation blanket is to reduce the standby heat loss attachment, or use of any type of energy-saving from the water heater’s storage tank.
  • Page 50: Installation Checklist

    INSTALLATION INSTRUCTIONS Installation Checklist A. Water Heater Location C. Water Supply/Relief Valve Indoor water heaters must be installed indoors. Water supply has sufficient pressure. Air has been purged from the water heater and Outdoor water heaters must be installed the piping. outdoors.
  • Page 51: Using Your Water Heater

    USING YOUR WATER HEATER Activating the Water Heater WARNING: Before operating this water heater, be sure to read and follow the instructions on the following label, all labels on the water heater, and the “Important Safety Information” section in this manual. Failure to do so can result in unsafe operating conditions that can result in death, personal injury, property damage, and/or product damage.
  • Page 52 USING YOUR WATER HEATER Activating the Water Heater Operating Instructions Read, understand, and follow the safety information listed on the operating label and in the “Important Safety Information” section in this manual. Turn on all electric power to the water heater. The remote control must be powered on prior to operating the water heater.
  • Page 53: Setting The Water Temperature

    USING YOUR WATER HEATER Safety Precautions WARNING: • DO turn off manual gas shut-off valve if water heater has been subjected to overheating, fire, flood, • Flammable vapors can be drawn by air currents physical damage, or if the gas supply fails to shut from surrounding areas to the water heater.
  • Page 54 USING YOUR WATER HEATER NOTICE: Maximum water temperature occurs while the water heater burner is ON. To determine the water The temperature set point by default cannot be increase temperature: above 120°F (49°C). Turn on the hot water faucet and place a To achieve temperatures above 120°F (49°C), refer page 56 thermometer in the water stream.
  • Page 55 USING YOUR WATER HEATER Setting the Water Temperature WARNING: Priority In-Use Indicator Indicator Improper adjustment, alteration, service, or maintenance (Lit during operation) can result in death, personal injury, property damage, and/ or product damage. Temperature Maximum Temperature Adjustment and Error Code Temperature Display by the Main Display Control...
  • Page 56: Wifi Setup

    USING YOUR WATER HEATER Setting the Water Temperature If need to disable the ability to set above 120°F, please refer the following steps: While "120" is shown on LED display, press and hold UP button for 5 seconds. "140" is shown on the LED display.
  • Page 57: Recirculation Pump Control

    USING YOUR WATER HEATER Recirculation Pump Control Pump Requirements Local codes or plumbing authority requirements may vary from the instructions or diagrams provided in this manual Voltage: 120V, 60Hz and take precedence over these instructions. In-rush current: Less than 2.5 amps Recirculation Mode Amperage: less than 2.0 amps Your tankless water heater has the ability to control...
  • Page 58 USING YOUR WATER HEATER Recirculation Pump Control Tankless Water Heater Expansion Tank Cold Water Shut-Off Hot Water to Tankless Valve to Fixtures Cold Water Check Supply Wire to Connect Valve (Copper Pump to heater Pipe) (8 ft long) Circulation Pump with Hot Water built in check Loop...
  • Page 59 To connect to the pump, cut the blue connector, splice the wires, and add a 4 amp fuse to the hot wire of the pump. Rheem recirculation pump kit includes a molex connector and a 4 amp fuse so splicing wires is not required.
  • Page 60 USING YOUR WATER HEATER Recirculation Pump Control Recirculation Operation DIP 2 DIP 1 Timer mode The water heater is turned ON when the recirculation pump starts operation. The water heater produces 1 2 3 4 1 2 3 4 hot water at the setting temperature. When the return water temperature reaches approximately 15°F (8°F) below the setting temperature, the water heater To select Energy Saver mode, change the fourth...
  • Page 61 • The PCB LED will flash one time display including WiFi capability. The unit is now in on demand mode. Rheem offers the display including WiFi capability. See the Parts and Accessories catalog for more NOTE: information.
  • Page 62: Water Saving Control Option

    USING YOUR WATER HEATER Water Saving Control Water saving control is optional and is inactive DIP 1 DIP 2 as default. To activate this control, appropriate procedures must be followed. Water saving control can reduce waste water at 1 2 3 4 1 2 3 4 initiation of hot water demand by reducing flow until outlet hot water reaches set temperature.
  • Page 63 USING YOUR WATER HEATER Water Saving Control 1 2 3 4 1 2 3 4 After setting the activation of this control, change the third switch on “DIP 1” to the OFF position (DOWN). Be sure to reapply any venting/altitude DIP switch settings.
  • Page 64: Caring For Your Water Heater

    CARING FOR YOUR WATER HEATER Water Heater Inspections Venting System (Direct Vent Only) Condensate Collector The venting system should be inspected annually CAUTIONS: to ensure all of the vent sections are secure and • Condensate is known to be acidic; refer to federal, state airtight.
  • Page 65 CARING FOR YOUR WATER HEATER Burner It is recommended the burner be annually inspected by a qualified service technician. DANGER: Shock Hazard – Removing the front cover panel exposes you to live electricity. Electric shock will cause death or serious personal injury. Burner Sight Glass...
  • Page 66: Care And Cleaning

    CARING FOR YOUR WATER HEATER Care and Cleaning DANGER: NOTICE: Shock Hazard – Make certain power to the water The air intake requires a minimum of 12 in. (30 cm) heater is OFF before removing protective cover of clearance between the air intake opening and for any reason.
  • Page 67 CARING FOR YOUR WATER HEATER CAUTION: CAUTION: DO NOT tap or force the filter during removal. This can DO NOT overtighten the water filter. Overtightening can deform and/or damage the filter. deform and/or damage the filter. Unscrew the water filter from the base of the cold Replace the filter in the cold water inlet line and water inlet line and carefully slide it out of the line.
  • Page 68: Preventive Maintenance

    CARING FOR YOUR WATER HEATER Preventive Maintenance WARNING: NOTICE: Failure to perform routine preventive maintenance can If the pressure relief valve on the hot water heater prevent the water heater from operating properly. Improper discharges periodically, this may indicate a problem in the operation can cause carbon monoxide dangers, excessive water system.
  • Page 69: Draining The Water Heater

    CARING FOR YOUR WATER HEATER Draining the Water Heater WARNING: Failure to follow these draining instructions can cause serious personal injury from scalding and/or product damage. Cold Water Supply Shut-Off Valve Close the water shut-off valve. Water Water Filter Drain Valve Turn off the water heater by pressing the POWER ON/OFF button on the LED display.
  • Page 70 CARING FOR YOUR WATER HEATER Draining the Water Heater CAUTION: Even when drained properly, a small amount of water will remain in the water heater. In cold weather conditions, this water can freeze. If this happens, allow the defrost protection on the water heater at least 60 minutes to melt the frozen water.
  • Page 71: Freeze Protection

    CARING FOR YOUR WATER HEATER Standard Drain Method Service isolator valve kits may be purchased from the manufacturer, distributor, or place of purchase. Pressure The kits include two full-port isolation valves to be Relief used in the inlet and outlet water lines. These kits Valve provide a means for full diagnostic testing and ease Cold Water...
  • Page 72: Vacation And Extended Shutdown

    CARING FOR YOUR WATER HEATER Vacation and Extended Shutdown WARNING: The water heater and piping should be drained if they might be subjected to freezing temperatures. Failure to drain the water heater can cause serious When drained, some water may remain in the unit. personal injury from scalding and/or product damage.
  • Page 73: Troubleshooting Chart

    CARING FOR YOUR WATER HEATER Troubleshooting Chart Problem Possible Cause Solution Water not hot enough. The temperature may be set too low. Increase the temperature setting at the remote control. The gas valve is not completely opened. Check and completely open the gas valve. Gas supply pressure is low.
  • Page 74: Service Error Code Chart

    CARING FOR YOUR WATER HEATER Service Error Code Chart Your water heater has an electronic diagnostic system built into it. When the water heater finds a problem, it displays an error code in the LED display on the remote control. The chart on the next page lists the error codes along with their possible problem and solution.
  • Page 75: Call For Assistance

    CARING FOR YOUR WATER HEATER Error Code Possible Cause Solution Water heater has buildup of lime deposits. Contact a dealer or qualified service techni- cian. The gas shut-off valve is not fully opened. Check shut-off valve and open completely. Gas service has been interrupted. Contact your gas utility company.
  • Page 76: Maintenance Notice

    CARING FOR YOUR WATER HEATER Maintenance Notice Maintenance notice is an optional control and is inactive as default. Maintenance notice reminds users of water heater maintenance activities such as flushing the heat exchanger or replacing the water treatment filter (if applicable) in order to maximize the life of your tankless water heater.
  • Page 77 CARING FOR YOUR WATER HEATER Maintenance Notice ERROR CODE 88 CLEARING IMPORTANT It is highly recommended to perform water heater maintenance activities such as flushing the heat exchanger and/or replacing the water treatment filter (if applicable) before clearing this error code. After these maintenance activities are completed, follow the steps below to clear error code "88".
  • Page 78: Parts Replacement

    PARTS REPLACEMENT Parts Ordering WARNING: 1. The model and serial number of the water heater from the rating plate. For your safety, DO NOT attempt to disassemble, repair, or 2. Specify the gas type (natural or LP) as marked on replace any portion of this unit.
  • Page 79: Warranty Information

    Rheem Sales Company, Inc. (Rheem) warrants this tankless gas water heater, and its component parts, to be free from defects in materials and manufacture, under normal use and service, for the Applicable Warranty Period specified below. At its option, Rheem will repair or replace the defective water heater, or defective component part(s), in accordance with the terms of this Limited Warranty, if it fails in normal use and service during the Applicable Warranty Period.
  • Page 80 Rheem or Ruud water heater from which the defective component part was removed; and the date the defective component part failed. You may also be required to provide documentary proof of the date of installation of the Rheem or Ruud water heater from which the defective part was removed –...

This manual is also suitable for:

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