Rheem RTG-3 Series Use And Care Manual

High-efficiency non-condensing tankless water heater

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HIGH-EFFICIENCY NON-CONDENSING
TANKLESS WATER HEATER
USE AND CARE MANUAL
With Installation Instructions for the Installer
Noncondensing 199,900 Btu/h, 180,000 Btu/h,
and 160,000 Btu/h 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 manual. Please read carefully and
keep in a safe place for future reference.
ULTRA
Low NOx
Emissions
ww w. a h r i d i rec t or y. org
SCAQMD Rule 1146.2
AP22009 Rev 04

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Summary of Contents for Rheem RTG-3 Series

  • Page 1 HIGH-EFFICIENCY NON-CONDENSING TANKLESS WATER HEATER USE AND CARE MANUAL With Installation Instructions for the Installer Noncondensing 199,900 Btu/h, 180,000 Btu/h, and 160,000 Btu/h Models ULTRA Low NOx Emissions ww w. a h 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 Safety Precautions ���������������������������������������������������������� 2 – 8 Activating the Water Heater ��������������������������������������������������52 Operating Instructions ����������������������������������������������������������53 Product Information Setting the Water Temperature ������������������������������������� 54 – 58 Product Information ��������������������������������������������������������������� 8 WiFi Set-up ��������������������������������������������������������������������������������������������58 Specifications ������������������������������������������������������������������ 9, 10 Piping for Space Heaters ������������������������������������������������������59 Flow Rate vs Pressure Drop RTGH-Series-3 �������������������������11 Recirculation Pump Control ����������������������������������������...
  • Page 3: Important Safety Information

    IMPORTANT SAFETY INFORMATION Water Heater Venting Safety D A N G E R DANGER: • 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 • This water heater must only be SETTINGS – Safety and energy used with the following water conservation are factors to be supply system conditions: considered when selecting the –...
  • Page 5 IMPORTANT SAFETY INFORMATION Natural Gas and Liquefied Petroleum Safety DANGERS: WARNINGS: • • Never attempt to convert the water heater from The installation of gas piping must conform to one gas type to another. The water heater should local utility company requirements and/or in the only use the fuel type in accordance with listing absence of local codes, use the latest edition of on data plate—natural gas for natural gas units...
  • 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 DANGER: CAUTIONS: • Shock Hazard – Make sure the electrical power • Label all wires prior to disconnecting for service. to the water heater is off to avoid electric shock Wiring errors can cause dangerous and improper that will result in death or serious personal operation.
  • Page 8: Safety Precautions

    IMPORTANT SAFETY INFORMATION General Installation and Maintenance Safety WARNINGS: SAFETY PRECAUTIONS: • This water heater must be installed in • Read this manual entirely before installing and/ accordance with these instructions, local or operating the water heater. codes, utility company requirements and/or •...
  • Page 9 PRODUCT INFORMATION Specifications – Direct-Vent Models 6.831 in (174 mm) 27.520 in 24.213 in (699 mm) (615 mm) 1.803 in (46 mm) 10.268 in (261 mm) 8.594 in (218 mm) 5.661 in 7.531 in (191 mm) APPROVED (144 mm) 6.508 in (165 mm) 5.563 in (141 mm) 5.465 in (139 mm) 3.945 in (100 mm)
  • Page 10: Specifications

    PRODUCT INFORMATION Specifications 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 Max��...
  • Page 11: Flow Rate Vs Pressure Drop Rtgh-Series-3

    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. Water Heater Flow Rate Curves Water Heater Flow Rate Curves RTG-95DVL-3 RTG-84DVL-3 RTG-70DVL-3 Delta T - Temperature Rise (°F) Pressure Drop Curve Water Flow Rate (GPM)
  • Page 12: General Descriptions

    PRODUCT INFORMATION General Descriptions Typical Direct-Vent Water Heater (Venting Required) Condensate Collector To Drain: Dispose of condensate in accordance with local codes. Built-In Display Power Supply Cord Water Filter Union Manual Gas Manual Gas Supply Line To Hot Water Shut-Off Valve Shut-Off Valve Faucet(s) Relief...
  • Page 13 PRODUCT INFORMATION Typical Outdoor Water Heater (No Venting Required) This water heater is for OUTDOOR installation only. DANGER: DO NOT install this water heater indoors or in a confined area. It is designed for outdoor installation only. Any other type of installation will result in death or serious personal injury. Flue Terminal Remote Control With Power Switch...
  • 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 20001, as ANSI standard Z223.1, or National Fire with these instructions, local codes, and utility Protection Association, 1 Batterymarch Park, MA company requirements. 02269 as NFPA 54. In the United States where local codes are not In Canada, use the latest edition of the CAN/ available, use the latest edition of the American CSA B149.1 Natural Gas and Propane Installation...
  • Page 16: Choosing A Location

    INSTALLATION INSTRUCTIONS Choosing a Location 12" min. (300 mm) Fire Stop Plate (as required) 0" min. (0 mm) Every vent pipe penetration of a floor or ceiling 1/2" min. 1/2" min. (13 mm) (13 mm) that is not in a fire-rated shaft requires a fire stop plate.
  • Page 17: Product Inspection

    INSTALLATION INSTRUCTIONS Product Inspection Visually inspect the water heater for any possible with the supplied type of gas (natural or LP). damage. Verify that all included supplied parts are present Check the rating plate on the water heater to make as shown.
  • Page 18 INSTALLATION INSTRUCTIONS Water Heater Installation 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.
  • Page 19 INSTALLATION INSTRUCTIONS Water Heater Installation Typical Installation of Outdoor Water WARNING: Heater (No Venting Required) DO NOT install this water heater indoors or in a confined area. It is designed for outdoor installation This water heater is for OUTDOOR installation only. only.
  • Page 20 INSTALLATION INSTRUCTIONS Mounting the Water Heater CAUTION NOTICE: The image above may differ in appearance from Reinforcement of the wall is required in case the your water heater. wall is not strong enough to hold the water heater. Failure to do so could result in personal injury and/ or product or property damage.
  • Page 21: Venting And High-Altitude Adjustments

    Category III products with Rheem tankless water joints between elbows or other fittings and the heater�...
  • Page 22 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Vent Lengths DO NOT USE Schedule 20, Cell Core, Drain Pipe, Galvanized, Aluminum or B-Vent. Before starting the vent installation, careful planning should be given to the routing and termination of the vent pipes. The length of the vent pipes (inlet and outlet) should be kept to a minimum.
  • Page 23 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater High-Altitude DIP Switch Adjustments When the water heater is installed above 2000 ft. (610 m), the settings on the DIP switch located DIP Switch 2 DIP Switch 1 on the control board need to be changed per vent length and altitude.
  • Page 24 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater 1/4" Per Foot Downward Slope (recommended) 90˚ Vent Pipe Wall Plate Elbow Fire Inspection Ceiling Inspection Stop Access Panel Access Panel (Optional) (Optional) Two (2) inspection access panels large enough to NOTICE: allow access for venting inspection. One access panel may be close to where the coaxial vent pipe It is recommend to have a vent length as short as enters the ceiling.
  • Page 25 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Appliance Vent Adapter Provision should be made to collect and dispose CAUTION: of condensate from the venting systems. Ensure that the appliance vent adapter is securely attached to the water heater collar. Improperly Downward Slope connected vent adapter can cause damage to the (recommended)
  • Page 26 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater In the Commonwealth of Massachusetts The Commonwealth of Massachusetts requires compliance with 4� INSPECTION� The state or local gas inspector of the side- regulation 248 CMR 4�00 and 5�00 for installation of through- wall, horizontally vented, gas-fueled equipment shall not the-wall vented gas appliances as follows: approve the installation unless, upon inspection, the inspector...
  • Page 27 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Horizontal Vent Terminal Location for Other than Direct Vent/Outdoor 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 Horizontal Vent Terminal 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 29 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater (cont.) Horizontal Vent Considerations WARNING: Moisture in the flue gas will condense as it leaves Rising moisture will collect under eaves. the vent terminal. In cold weather this condensate Caulk can freeze on the exterior wall, under the eaves, If soffit vent is too close, block off and install new and on surrounding objects.
  • Page 30 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Horizontal Vent Installation WARNING: Follow the vent manufacturer’s installation instructions since design might vary from manufacturer to manufacturer. Improper vent installation can result in death, personal injury, product damage, and/or poor performance. CAUTION: Use UL-approved Category III Stainless Steel vent material only.
  • Page 31 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Horizontal Vent Installation (cont.) Typical Horizontal Termination with Using a thick bead of high temperature silicone, seal the overlapping area of the outer 5-in. (12.7- 1/4 In. Per Foot of DOWNWARD Slope cm) pipe. 1/4"...
  • Page 32 NOTICE: Only Rheem-approved termination and parts should be used during installation. Support vertical and horizontal runs as described Install a fire stop plate at every penetration of a on "Venting".
  • Page 33 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Vertical Vent Terminal Location 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: U�S� Installation Canadian Installation Location Requirements...
  • Page 34 INSTALLATION INSTRUCTIONS Venting for Direct-Vent Water Heater Standard Vertical Vent Termination Vertical Termination Adapter Intake Storm Collar Adjustable Roof Flashing 3" to 5" Concentric Pipe Support Clamp Fire Stop 1/4" Per Foot Upward Slope Fire Stop Support Hanger CAUTION: The condensate collector must be used with vertical vent installation.
  • Page 35: Water Quality/Supply

    • Flush the water heater’s heat exchanger regularly. not in accordance with the specifications in the Rheem offers a flush kit and isolation valves to help table below. remove scale build up. (See below)
  • Page 36 INSTALLATION INSTRUCTIONS Water Supply Recirculation Required Water Pressure = Min. Operating Water Pressure (14 psi [97 kPa]) Direct recirculation is allowed, provided the loop is thermostatically controlled, and a timer is used + Pipe Pressure Loss to turn the pump off during off peak periods. The pump must be sized for a minimum of 5 gpm at + Faucet Pressure Loss 25 ft of head plus building head.
  • Page 37 INSTALLATION INSTRUCTIONS Water Supply NOTICE: Be sure to connect the COLD water inlet and the HOT water outlet as shown on the water heater. If reversed, the water heater will not function. The flow rate of HOT water may vary when more than two faucets (appliances, fixtures, etc.) are being used simultaneously.
  • Page 38 INSTALLATION INSTRUCTIONS Water Supply Relief Valve A new pressure-relief valve, complying with the For safe operation of the water heater, be sure Standard for Relief Valves and Automatic Gas that: Shut-Off Devices for Hot Water Supply Systems, The pressure rating of the relief valve must not ANSI Z21.22/CSA 4.4, must be installed at the exceed 150 psi (1,034 kPa) or the maximum HOT water outlet connection of the water heater...
  • Page 39: Gas Supply

    INSTALLATION INSTRUCTIONS Water Supply Hot and Cold Pipe Insulation Installation WARNINGS: For increased energy efficiency, use pipe insulation as shown in the diagram� Insulate the pipes all the way When pipe insulation is not rated for the to the top� DO NOT cover any drain or pressure-relief appropriate weather conditions, install electric valve(s)�...
  • Page 40 INSTALLATION INSTRUCTIONS Gas Supply Gas Piping Pipe-Sizing Procedure Determining the required pipe size. The gas system is designed to operate at a certain The gas supply system must be properly sized maximum pressure drop. A pressure drop greater to ensure the proper operation of this tankless than what is permissible can cause operational water heater as well as all the gas appliances on issues with the gas appliances.
  • Page 41 INSTALLATION INSTRUCTIONS Gas Supply Final Considerations If this water heater is replacing an existing water pressure on the system must be 8.0 inch W.C. or heater, it is important to verify the capacity of the gas greater. Second the capacity of the pipe as outlined in system.
  • Page 42 INSTALLATION INSTRUCTIONS Gas Supply Gas Supply Installation Using the proper-size piping, fittings, and Install the manual gas appliance shut-off valve to components, build the gas supply line to the water the gas connection at the water heater. The shut- heater. off is supplied with the water heater.
  • Page 43 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 44 Rheem Customer Service phone number listed can result in improper operation of the appliance in the "Call for Assistance" section. See "High-...
  • Page 45: Electrical Wiring

    INSTALLATION INSTRUCTIONS Electrical Wiring Wiring Diagram...
  • Page 46: Remote Control Selection And Location

    INSTALLATION INSTRUCTIONS Electrical Wiring Remote Control Selection and Location Review the following considerations before WARNING: determining the location of the remote control(s): Field wiring connections and electrical grounding must • DO NOT install any remote control comply with local codes or, in the absence of local outdoors or where it can come in codes, with the latest edition of the National Electrical contact with water.
  • Page 47: Remote Control Installation

    INSTALLATION INSTRUCTIONS Remote Control Installation (Outdoor Models) WARNING: Field wiring connections and electrical grounding must comply with local codes or, in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA 70, or in Canada, Canadian Electrical Code, CAN/CSA C22.1, Part 1.
  • Page 48: Wifi Remote Installation

    INSTALLATION INSTRUCTIONS Remote Control Installation (Outdoor Models Only) Remote Control Installation (cont.) Connecting the Remote Control to the Water Heater: Firmly tighten the terminal screws by hand. Ensure that the power to the water heater has been disconnected. Reinstall the front cover panel on the water heater. Remove the front cover panel on the water heater.
  • Page 49 INSTALLATION INSTRUCTIONS WiFi Remote Circulation (Certain Models Only) NOTICE: Wifi remote must be installed Indoors. Drill a 1- to 1 1/2 in. hole at the proposed control location. Run the control cable between the Install the front cover over the wifi display and snap it in to secure.
  • Page 50: 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 damage water heaters are not necessary� The purpose of an or defect caused by insulation, insulation attachment, or insulation blanket is to reduce the standby heat loss use of any type of energy-saving or other unapproved from the water heater’s storage tank�...
  • Page 51: 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 the Outdoor water heaters must be installed outdoors� piping�...
  • Page 52: Using Your Water Heater

    USING YOUR WATER HEATER Activating the Water Heater WARNING: NOTICE: If you have any problems reading or following Before operating this water heater, be sure to read the instructions in this manual, STOP and call a and follow the instructions on the following label, qualified service technician or contractor.
  • Page 53: Operating Instructions

    USING YOUR 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 54: 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, • Flammable vapors can be drawn by air fire, flood, physical damage, or if the gas currents from surrounding areas to the water supply fails to shut off.
  • Page 55 USING YOUR WATER HEATER Setting the Water Temperature (cont.) NOTICE: Maximum water temperature occurs while the water heater burner is on. To determine the water The temperature set point on the standard remote temperature: control cannot be increased above 112°F (44°C) when a hot water faucet is in the open position.
  • Page 56 USING YOUR WATER HEATER Setting the Water Temperature WARNING: Priority In-Use Indicator Indicator (Lit during operation) Improper adjustment, alteration, service, or maintenance can result in death, personal injury, property damage, and/or product damage. Maximum Temperature Adjust- Temperature and Error Code Temperature ment by the Main Display Con- Display...
  • Page 57 USING YOUR WATER HEATER Setting the Water Temperature Press the UP adjustment button repeatedly until 120°F (49°C) shows in the LED display. Hold the UP button until “140” on the display starts to blink and continue holding the UP button. While "120"...
  • Page 58: Wifi Set

    USING YOUR WATER HEATER Setting the Water Temperature Press the UP or DOWN adjustment button to set Turn off the gas and water to the water heater by the desired temperature. closing the shut-off valves. Turn on the gas and water to the water heater by Press the DOWN adjustment button repeatedly opening the shut-off valves.
  • Page 59: Piping For Space Heaters

    USING YOUR WATER HEATER Piping for Space Heaters Local codes or plumbing authority requirements may • If this water heater is installed in an vary from the instructions or diagrams provided in this application intended to supply domestic manual and take precedence over these instructions� hot water needs and hot water for space heating purposes, DO NOT connect the heater to an existing heating unit or...
  • Page 60: Recirculation Pump Control

    USING YOUR WATER HEATER Recirculation Pump Control WARNING: Local codes or plumbing authority requirements may vary from the instructions or diagrams provided in this manual and take precedence over these instructions. A control board can be damaged if amperage exceeds 2.0 amps.
  • Page 61 Follow any applicable electrical code and the pump Recirculation Pump Installation". manufacture installation instruction referring to the Pump Electrical Connection Diagram in Step 5 of these * Check valve is included in Rheem instructions. recirculation pump kit. DIP Switch Control Board...
  • Page 62 USING YOUR WATER HEATER Recirculation Pump Control Turn On the remote control. The pump and water heater will turn on to raise recirculation loop Switch Switch temperature. Recirculation Operation 1 2 3 4 1 2 3 4 "MIN" "MAX" The water heater is turned ON when the button button recirculation pump starts operation.
  • Page 63 • In less than one minute. capability. • Turn Switch 1 on DIP 2 on-off-on-off. Rheem offers the display including WiFi capability. • Press the Adjust Button See the Parts and Accessories catalog for more • The LED will flash one time information.
  • Page 64: 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 initiation of hot water demand by reducing flow 1 2 3 4 until outlet hot water reaches set temperature.
  • Page 65 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 66: Caring For Your Water Heater

    CARING FOR YOUR WATER HEATER Water Heater Inspections Venting System Condensate Trap (Direct Vent Only) (Direct Vent Only) CAUTION: The venting system should be inspected annually by DO NOT operate without the condensate trap a qualified service technician to ensure all of the vent connected to the vent and routed to the proper sections are secure and airtight�...
  • Page 67 CARING FOR YOUR WATER HEATER Water Heater Inspections Burner It is recommended that the burner be inspected annually by a qualified service technician� DANGER: Burner Sight Glass Shock Hazard – Removing the front cover panel exposes you to live electricity. Electric shock will cause death or serious personal injury.
  • Page 68: Care And Cleaning

    CARING FOR YOUR WATER HEATER Care and Cleaning DANGER: NOTICE: Shock Hazard – Make certain power to the water heater The air intake requires a minimum of 12 in. (30 cm) is OFF before removing protective cover for any reason. of clearance between the air intake opening and any Electric shock will cause death or serious personal obstruction.
  • Page 69 CARING FOR YOUR WATER HEATER Care and Cleaning CAUTION: CAUTION: DO NOT tap or force the filter during removal. This DO NOT overtighten the water filter. Overtightening can deform and/or damage the filter. can deform and/or damage the filter. Unscrew the water filter from the base of the cold water Replace the filter in the cold water inlet line and tighten inlet line and carefully slide it out until it is snug�...
  • Page 70: Preventive Maintenance

    CARING FOR YOUR WATER HEATER Preventive Maintenance WARNING: NOTICE: Failure to perform routine preventive maintenance If the pressure relief valve on the hot water heater can prevent the water heater from operating discharges periodically, this may indicate a problem properly. Improper operation can cause carbon in the water system.
  • Page 71: 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. Turn off the water heater by pressing the POWER ON/OFF button on the control panel.
  • Page 72 CARING FOR YOUR WATER HEATER Draining the Water Heater (cont.) 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 73: Freeze Protection

    CARING FOR YOUR WATER HEATER Draining the Water Heater (cont.) Preferred Drain Method Isolator valve kits may be purchased from the manufacturer, distributor, or place of purchase� The kits include two full port isolation valves to be used in the inlet and outlet water lines�...
  • Page 74: 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� When Failure to drain the water heater can cause serious drained, some water may remain in the unit� See “Freeze personal injury from scalding and/or product Protection”...
  • Page 75: Troubleshooting Chart

    CARING FOR YOUR WATER HEATER Troubleshooting Chart (cont.) Problem Possible Cause Solution 1� 1� Water not hot enough� The temperature may be set too low� Increase the temperature setting at the remote control� 2� 2� The gas valve is not completely opened� Check and completely open the gas valve�...
  • Page 76: 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 following chart lists the error codes along with their possible problem and solution.
  • Page 77: Call For Assistance

    (page 8) and all qualified service companies 2. If your problem has not been solved to your that have worked on the water heater. satisfaction, contact the Rheem National Service Department at the following address: D. Original installation date. (See page 8.) E.
  • Page 78: Maintenance Notice Option

    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 79 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 80: Parts Ordering

    IF YOU NEED SERVICE 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, 2. Specify the gas type (natural or LP) as marked repair, or replace any portion of this unit. Refer all on the rating plate.
  • Page 81 IF YOU NEED SERVICE Parts Ordering Outdoor Gas Components Ref # Description Ref # Description Front Cover Final Assembly Inlet Water Connection Front Cover Screw Water Filter Cabinet Bracket Manifold/Gas Valve Kit Power Cord Manifold Screw Display/Controller Gas Connection Blower Motor Inlet Gas Screw HEX Thermistor Control Board...
  • Page 82: 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 83 If an exact replacement is not available, Rheem will provide you with the current model of your water heater, or component part(s), or a replacement unit with comparable operating features.
  • Page 84 NOTES...

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