richmond tankless water heater manual
Richmond tankless water heaters offer high‑efficiency, condensing and non‑condensing models such as RMTG70DVLN‑3, RMTG95XELN‑3, and RMTGH95DVN. The manual details installation, venting diagrams, clearance dimensions, and safety procedures, ensuring proper setup and compliance with local codes. Follow safety. and us.
Model Overview
Richmond offers RMTG and RMTGH series, ranging from 70 to 95 gallon‑per‑hour capacities; RMTG models are non‑condensing, while RMTGH units are condensing, delivering higher efficiency. Each unit includes a hanging bracket for secure mounting and detailed venting options.NFPA 54 compliant!.
RMTG Series
The RMTG Series comprises high‑efficiency, non‑condensing tankless gas water heaters designed for residential use. Models include the RMTG70DVLN‑3, RMTG84DVELN‑3, RMTG95DVELN‑3, RMTG70XLN‑3, RMTG84XELN‑3, and RMTG95XELN‑3, offering flow rates of 70, 84, and 95 gallons per hour respectively. Each unit is engineered with a robust stainless‑steel heat exchanger that delivers rapid temperature rise while minimizing heat loss. The series features a built‑in hanging bracket that allows the heater to be securely mounted on a wall, reducing vibration and extending service life. Venting options are clearly illustrated in the manual’s diagrams: an indoor direct‑vent configuration with a vertical vent pipe and an outdoor venting layout featuring a horizontal vent pipe. The manual specifies precise clearance dimensions in inches, ensuring compliance with local building codes and optimal combustion efficiency. Additionally, the RMTG Series includes a built‑in safety shut‑off valve and a pressure relief valve that is calibrated for the specific model. The user is guided through the installation process, from securing the mounting bracket to connecting the gas supply and verifying vent integrity. The manual emphasizes proper gas line sizing based on the National Fuel Gas Code, and it provides troubleshooting tips for common issues such as pilot light failure or low flow. Overall, the RMTG Series delivers reliable, efficient hot water on demand with a focus on safety, ease of installation, and long‑term performance. All units comply with NFPA 54 guidelines, ensuring safe operation!
RMTGH Series
The RMTGH Series represents Richmond’s latest line of condensing tankless gas water heaters, engineered for maximum energy efficiency and reliability in residential applications. Models such as the RMTGH95DVN deliver 95 gallons per hour of continuous hot water, while the RMTGH70DVN and RMTGH84DVN provide 70 and 84 gallons per hour respectively, catering to a range of household demands. Each unit incorporates a high‑temperature, stainless‑steel heat exchanger that captures and recycles combustion gases, achieving condensing efficiencies that exceed 90 %. The manual details the installation process, emphasizing the importance of proper venting—either indoor direct‑vent or outdoor venting configurations—illustrated with top and bottom views and precise clearance dimensions measured in inches. A hanging bracket is included for secure wall mounting, and the design accommodates both vertical and horizontal vent pipes. Safety features include an automatic shut‑off valve, a pressure relief valve calibrated to the unit’s specifications, and a built‑in pilot light safety switch. The RMTGH Series also offers a user‑friendly digital display that indicates flow rate, temperature, and diagnostic codes, allowing homeowners to monitor performance and troubleshoot issues such as pilot light failure or low flow. The manual references NFPA 54 and local code compliance, providing wiring diagrams, gas line sizing guidelines, and venting clearances to ensure safe, code‑compliant installation. Maintenance instructions cover routine checks of the heat exchanger, vent system, and pilot assembly, ensuring longevity and consistent performance. Overall, the RMTGH Series delivers high‑efficiency hot water on demand backed by robust safety features. All units comply NFPA54!!!
Warranty Coverage
Richmond’s tankless water heater warranty provides peace of mind for residential and commercial users. The manufacturer offers a five‑year limited warranty on the entire unit, covering major components such as the heat exchanger, control board, and gas valve. For the RMTG and RMTGH series, the heat exchanger is covered for ten years, reflecting its stainless‑steel durability. A five‑year warranty also protects the condensate drain system. The warranty covers defects in materials and workmanship under normal operating conditions, including proper installation, routine maintenance, and adherence to the installation manual’s guidelines. It excludes damage from improper installation, lack of maintenance, or user modifications. To qualify, the unit must be registered online within 30 days of purchase, and the serial and model numbers recorded. Service requests can be submitted via the manufacturer’s website or authorized technicians. The warranty includes a limited lifetime guarantee on the pilot light assembly to prevent accidental ignition. For warranty claims, the manufacturer requires proof of purchase, installation documentation, and a detailed issue description. If a component is defective, it will be repaired or replaced at no cost. Consumable parts such as filters or the condensate pump are not covered and must be replaced by the user or a licensed technician. All claims must be processed within the warranty period; after expiration, repair services may incur a fee. The warranty is governed by the laws of the state of registration and is non‑transferable. If the unit is moved, it must be re‑registered. The manufacturer offers a 24/7 hotline and an online portal to track claim status. The warranty also covers the electronic control module for five years, ensuring electronic failures are addressed promptly. In case of a claim, a certified technician will evaluate the unit, and defective parts will be replaced with OEM components. The warranty does not cover damage from high mineral content water; installing a water softener is recommended if hardness exceeds 150 ppm. The warranty is valid only in the country of purchase and is non‑transferable. Claims filed after expiration may incur a service fee. All disputes will be resolved in the appropriate jurisdiction. For full terms, consult the warranty booklet or official website.
Installation
Richmond tankless heaters require proper venting, clearance, and gas connections. Follow the manual’s diagrams for indoor direct vent or outdoor venting. Mount with the included bracket, ensure 12‑inch clearance, and connect gas line per local codes. Verify pressure before use. Ensure proper !
Indoor Direct Vent
Richmond tankless water heaters designed for indoor direct vent applications feature a vertical vent pipe that directs combustion gases safely to the exterior. The installation manual provides detailed top‑and‑bottom‑view diagrams illustrating the exact placement of the unit, the vent pipe, and the required clearances measured in inches. A sturdy hanging bracket is supplied with the heater, allowing the unit to be mounted on a wall or a dedicated support structure. The bracket must be securely fastened to a load‑bearing surface, and the vent pipe should be connected to the bracket’s mounting flange with a sealed joint to prevent leaks. Clearance dimensions are critical: a minimum of 12 inches must be maintained between the vent pipe and any combustible material, and at least 6 inches of clearance is required on all sides of the unit itself. The manual specifies that the vertical vent pipe should be oriented so that the gases exit at a 90‑degree angle to the wall, ensuring proper draft and preventing backflow. Additionally, the vent pipe should be insulated to reduce heat loss and protect surrounding surfaces. The installation process also requires the gas supply line to be connected to the heater’s inlet valve, with a shut‑off valve installed upstream for safety. All connections must be tightened to the manufacturer’s torque specifications, and a pressure test should be performed to confirm the integrity of the venting system. Finally, the manual advises inspecting the vent pipe for any kinks or obstructions before powering the unit, as these can compromise performance and safety. The vent pipe should be made of stainless steel or aluminum to resist corrosion, and its diameter must match the heater’s specifications, typically 4 inches for 70‑BTU models and 5 inches for 95‑BTU models. The pipe should run vertically for at least 12 inches before terminating at the roof or wall, with a 90‑degree elbow to direct gases outward. A vent pipe sealant should be applied at all joints to ensure airtightness. The vent pipe termination must be located at least 18 inches above any egress opening to prevent backdraft. During installation, a vent pipe inspection brush should be used to clear any debris from the interior of the pipe before sealing. The vent pipe should be inspected annually for cracks, corrosion, or loose fittings, and any issues should be repaired immediately to maintain safety. The mounting bracket should be positioned so that the unit’s weight is evenly distributed, and the bracket’s mounting holes should align with the wall studs. The bracket’s mounting screws should be tightened to the manufacturer’s torque specification, typically 30 ft‑lb. The vent pipe should be supported at 24‑inch intervals to prevent sagging. The vent pipe should be capped with a vent pipe cap if the unit is not in use, and the cap should be secured with a vent pipe cap clamp. The vent pipe should be checked for proper alignment by measuring the distance from the vent pipe to the nearest combustible surface; this distance must be maintained throughout the pipe’s length. The vent pipe should be inspected for any signs of rust or corrosion, and any damaged sections should be replaced with new pipe. The vent pipe should be inspected for any kinks or bends that could restrict airflow, and the pipe should be straightened or replaced as needed. The vent pipe should be inspected for any signs of water intrusion, and any leaks should be sealed with vent pipe sealant.
Outdoor Venting
Outdoor venting for Richmond tankless water heaters employs a horizontal vent pipe that directs exhaust gases away from the building. The installation manual provides top‑and bottom‑view diagrams showing the vent pipe’s orientation, length, and required clearances measured in inches. A horizontal vent pipe is typically 4 inches in diameter for 70‑BTU models and 5 inches for 95‑BTU models, and it must extend at least 12 inches beyond the unit before terminating at a roof or wall opening. The vent pipe should be installed with a 90‑degree elbow that turns the exhaust gases upward, ensuring a proper draft and preventing backflow. The manual specifies a minimum clearance of 12 inches between the vent pipe and any combustible material, and at least 6 inches of clearance on all sides of the unit. The vent pipe should be supported at 24‑inch intervals to prevent sagging, and all joints must be sealed with vent pipe sealant to maintain airtightness. A vent pipe cap is required at the termination point, and the cap must be secured with a clamp that matches the pipe diameter. The vent pipe should be inspected annually for cracks, corrosion, or loose fittings, and any issues should be repaired immediately. The mounting bracket for the unit must be attached to a load‑bearing wall or support structure, and the bracket’s mounting screws should be tightened to the manufacturer’s torque specification, typically 30 ft‑lb. The vent pipe should be insulated to reduce heat loss and protect surrounding surfaces. The manual advises vent pipe termination 18 inches above egress opening backdraft to.
Clearance Dimensions
Clearance dimensions are critical for safe and efficient operation of Richmond tankless water heaters. The manual specifies minimum clearances around the unit, vent pipe, and surrounding surfaces to prevent heat damage, allow airflow, and meet code requirements. For indoor direct‑vent models, the front clearance must be at least 12 inches from any wall or obstruction, the rear clearance 6 inches, and the side clearance 6 inches. The top clearance is 6 inches above the unit, and the bottom clearance is 6 inches below the unit. The vent pipe must be positioned so that the horizontal run has a minimum clearance of 12 inches from combustible materials, and the vertical section must maintain a clearance of 12 inches from any surface. For outdoor venting, the horizontal vent pipe requires a clearance of 12 inches from the roof edge, and the vertical section requires a clearance of 12 inches from the wall. The vent pipe termination must be at least 18 inches above the nearest egress opening to prevent backdraft. The mounting bracket must be installed on a load‑bearing wall with a clearance of 6 inches from the nearest obstruction. All clearances are measured from the outermost edge of the unit or vent pipe to the nearest surface. The manual also recommends a minimum clearance of 12 inches between the vent pipe and any sprinkler head, fire alarm, or other HVAC equipment. The clearance dimensions are illustrated in the top‑view and side‑view diagrams, which show the required distances in inches. Failure to observe these clearances can result in overheating, reduced efficiency, or code violations. The manual advises regular inspection of clearance dimensions during maintenance, especially after any relocation or modification of the unit or venting system. By adhering to these clearance specifications, users can ensure safe operation, optimal performance, and compliance with local building codes and manufacturer guidelines. The manual also provides a table that lists clearance dimensions for each model series, including RMTG70, RMTG84, RMTG95, and RMTGH95, allowing installers to verify compliance quickly. In addition, the manual specifies that the vent pipe must be insulated to a minimum of 2 inches of foam insulation, which also contributes to clearance by adding thickness to the pipe. Installers should use a calibrated tape measure to verify clearances before finalizing the installation, and any deviation should be corrected before energizing the unit. These clearance requirements are mandatory and should be documented in the installation record for future reference.
Operation
Start by ensuring the unit is powered and vented correctly. Turn the main valve to open, then press the power button. Adjust the temperature dial to desired setpoint; the display shows current and set temperatures. The heater supplies fast hot water on demand, cycling off when no flow is detected.!
Turn‑On Procedure
Before powering the unit, verify that the gas supply is on and the main water valve is fully open. Ensure the venting system is correctly installed and free of obstructions. Locate the power switch on the front panel; it is labeled “ON/OFF.” Press the switch to the ON position. The indicator light should illuminate, confirming power delivery. Next, set the desired temperature using the digital dial or touch‑screen interface. The display will show the current water temperature and the setpoint. If the unit is a condensing model, confirm that the condensation drain is connected and the drain line is clear. After setting the temperature, the heater will automatically begin pre‑heating the water. You will hear a brief startup sequence, followed by a steady humming as the burner ignites. The digital readout will display the flow rate and the time remaining until the water reaches the set temperature. Once the water temperature reaches the target, the unit will enter standby mode, cycling on only when a flow demand is detected. To test the system, open a hot water tap and observe the temperature rise. If the water does not reach the set temperature, check the flow sensor, gas pressure, and venting for blockages. In case of an error code, consult the troubleshooting section of the manual. Finally, after use, turn the power switch to OFF, close the main water valve, and shut off the gas supply to ensure safety. Proper adherence to this procedure guarantees efficient operation and extends the lifespan of the Richmond tankless water heater.
Temperature Settings
Setting the correct temperature on a Richmond tankless water heater is essential for comfort, energy efficiency, and safety. The digital control panel on the front of the unit displays the current water temperature, the user‑selected setpoint, and the flow rate. To adjust the temperature, press the “SET” button until the display blinks, then use the “+” and “–” arrows to increase or decrease the temperature in 1°F increments. The recommended range for most residential applications is 120°F to 140°F; lower settings reduce energy consumption, while higher settings provide a hotter supply for showers or laundry. Once the desired temperature is displayed, press “ENTER” to lock the setting. The heater will immediately begin heating water to reach the new setpoint. If the unit is condensing, the display will also indicate condensing status and the efficiency rating (typically 90%–95% SEER). For safety, the maximum allowable temperature is 170°F, enforced by a hard‑wired limit switch that shuts down the burner if the water temperature exceeds this threshold. The thermostat monitors the inlet water temperature; if the incoming water is too cold, the heater will increase the flame intensity to compensate. Users should avoid setting temperatures above 140°F in households with children or the elderly, as scalding risk increases. The control panel also offers an “Eco” mode that automatically lowers the temperature during low‑usage periods, further saving energy. The unit has a quick start mode to reduce hot water time. Consult local codes for venting clearance. Finally, the manual provides a troubleshooting guide for common temperature‑related issues, such as lag in heating, inconsistent temperature, or error codes indicating sensor failure. By following these steps, operators can maintain optimal performance and safety for their Richmond tankless water heater.
Maintenance
Regular cleaning of the heat exchanger, descaling, and checking the air filter keeps the unit efficient. Follow the manufacturer’s schedule: every 6 months for high‑flow models, yearly for low‑flow. Replace worn parts promptly. Inspect the vent for blockages careful! Check for corrosion!!!
Heat Exchanger Cleaning
Cleaning the heat exchanger is essential for maintaining the efficiency and longevity of Richmond tankless water heaters. The process begins by turning off the unit, disconnecting the power supply, and allowing the water to cool. Once the system is safe, remove the access panel and locate the heat exchanger fins. Use a soft brush or a vacuum with a brush attachment to gently remove sediment and mineral buildup. For stubborn deposits, a mild descaling solution can be applied, following the manufacturer’s recommendations to avoid corrosion. This keeps the exchanger clean and efficient. Reassemble the panel, restore power, and perform a test run to ensure proper operation. Regular cleaning every 6 to 12 months, depending on water hardness, helps prevent reduced heat transfer and protects the internal components from damage.
To ensure optimal performance, maintain a detailed service log that records each cleaning cycle, any adjustments made to temperature settings, and observations of water flow quality. When performing routine checks, use a non‑contact infrared thermometer to verify that the heat exchanger surface remains within the specified temperature range. Inspect the venting system for leaks or obstructions; a simple smoke test can confirm proper airflow. If you detect any irregularities, such as a drop in hot water output or unusual noises, shut off the unit and consult the troubleshooting guide before proceeding. Secure unit with the bracket prevent vibration. Finally, schedule inspection to verify safety interlocks pressure relief valves condensate drains are functioning correctly, thereby safeguarding both the appliance and your household. This routine extends unit life.!!
Keep unit efficient and longevity