Installation and Operation instructions Infiniti Tankless® K-Series FOR OUTDOOR INSTALLATIONS ONLY WARNING! Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier. NOTICE Upon completion of the installation, these instructions should be handed to the user of the appliance for future reference.
Table of contents Table of contents 1 Key to symbols and safety instructions . . . . . . . . . . . . .3 1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 1.2 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . .3 2 Safety information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 6.5 Information /Adjustments menu. . . . . . . . . . . . . . 33 6.5.1 P4 (Information) . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.5.2 P9 (Purge) . . .
Key to symbols and safety instructions 1.2 1 Key to symbols and safety instructions 1.1 Key to symbols Warnings In warnings, signal words at the beginning of a warning are used to indicate the type and seriousness of the ensuing risk if measures for minimising danger are not taken. The following signal words are defined and can be used in this document: DANGER: DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
Key to symbols and safety instructions H WARNING: ▶ To ensure that the water heater functions properly, follow these installation and maintenance instructions. ▶ Never close the blow-off line of the pressure safety valve. For safety reasons, water may escape during heating. H DANGER: Risk of explosion! If you smell gas, ▶ Turn off the gas shut-off valve. ▶ Open windows and doors if detected inside the house. ▶ Do not try to light the appliance.
Key to symbols and safety instructions H WARNING: Never shut off safety valves! ▶ Water may escape from the safety valve at any time when the water is being heated. H WARNING: Inspection/maintenance ▶ Servicing and repairs may only be carried out by a trained and certified installer. ▶ Immediately correct all faults to prevent system damage. ▶ Use only Bradford White spare parts! Damage caused by the use of parts not supplied by Bradford White may void the warranty. H CAUTION: Instruct the customer.
Key to symbols and safety instructions manufacturer's recommendations and instructions. ▶ Water exiting from drain valves can be extremely hot. To avoid injuries: – Check that all connections are tight. – Direct exiting water away from people. ▶ Measures must be taken to protect against excessive temperature and pressure! Installation of a pressure relief valve (PRV) is required.
Key to symbols and safety instructions DANGER: Electric shock! ▶ 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 Electric Code, ANSI/ NFPA 70, or in Canada, all electrical wiring must comply with the local codes and the Canadian Electrical Code, CSA C22.1 Part 1. DANGER: Electric shock! Shock hazard: line voltage is present. ▶ Before servicing the water heater, unplug power supply cord from outlet.
Key to symbols and safety instructions WARNING: Fire danger! ▶ Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids. NOTICE: ▶ Do not obstruct the flow of combustion and ventilation air. WARNING: Risk of scalding and property damage. ▶ Precautions must be taken prior to manually operating the pressure relief valve to avoid contact with hot water discharged from the pressure relief valve and to prevent water damage.
Safety information 2 Safety information 1) Source: Moritz, A.R. and Henriques, F.C., Jr. (1947). Studies of thermal injury. II. The relative importance of time and surface temperature in the causation of cutaneous burns, Am J of Pathol, 23, 695-720. Table 2 Approximate time-temperature relationship until there is a risk of scalding WARNING: CANCER AND REPRODUCTIVE HARM WWW.P65WARNINGS.CA.GOV AS REQUIRED BY THE STATE OF CALIFORNIA PROPOSITION 65.
Appliance details • • • Real-time diagnostics for troubleshooting/informational purposes. Built in freeze protection. Integrated siphon to limit condensate freezing in external condensate pipes. Note: The freeze prevention kit is designed to provide protection for the water heater down to approximately 5 °F (-15 °C) for short term conditions only when protected from direct wind exposure. It will not protect the appliance in areas where the temperature is routinely expected to be below freezing.
Appliance details 3.2 Specifications (Technical data) Approved in US/Canada Technical characteristics Units Infiniti Tankless® K-Series RTG-K-199N/X2 Infiniti Tankless® K-Series RTG-K-160N/X2 Capacity Maximum flow rate at a 35 °F (19.4 °C) rise1) GPM (l/min) 11.2 (42.4) 9 (34) Maximum flow rate at a 45 °F (25 °C) rise GPM (l/min) 8.7 (32.9) 7(26.7) Maximum flow rate at a 55 °F (30.6 °C) rise GPM (l/min) 7.2 (27.5) 5.8 (21.9) Maximum flow rate at a 75 °F (41.7 °C) rise GPM (l/min) 5.
Appliance details Technical characteristics Units Infiniti Tankless® K-Series RTG-K-199N/X2 Infiniti Tankless® K-Series RTG-K-160N/X2 Electrical Nominal V AC 120 120 Frequency Hz 60 60 Amperage (Idle) mA 40 40 Operation A ≤ 2.4 ≤ 2.4 Water protection9) IP X5D X5D 1) These flow rates are based upon setting the unit to higher temperatures and then mixing down using cold water after the unit.
Appliance details 3.3 Unpacking the heater The heater is default-set by the manufacturer to operate with Natural Gas, for use with Liquid Propane, follow the conversion instructions in section 6.7.1. Before installing the unit, be certain you have the heater correctly set for your type of Gas - Propane or Natural Gas. Identification labels are found on the shipping box, and on the rating plate which is located on the left side (when facing appliance front) of the cover. Fig.
Appliance details 3.4 General rules to follow for safe operation H Warning: Safety Rules! 1. You must follow these instructions when you install your heater. In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. In Canada: The Installation must conform with CSA B149.(1,2) INSTALLATION CODES and /or local installation codes. 2. Carefully plan where you install the heater.
Appliance details 3.5 Fig.
Installation instructions 4 Installation instructions 4.1 Installation tools The following specialized tools may be required if converting from natural gas to LP: • Pressure manometer 4.2 Introduction NOTICE: Risk of appliance freezing! ▶ The water in this water heater is cold and always remains cold except for the times the burner is on. In the event of power outage in conjunction with freezing temperatures, the heater should be drained. See chapter 7.
Installation instructions ▶ The installation method of the mounting bracket will depend on the type of mounting surface. Due to the varieties of building siding or surfacing, the installer must decide on how best to support and level the heater on an outside wall. It is recommended that horizontal or vertical support boards or plywood sheathing (½" minimum) first be attached to the wall surface. The heater must be kept level on the wall surface. Fig. 5 Ref Description A B C Min.
Installation instructions 4.5.1 Air openings Air openings are located on the back of the water heater. The combustion air enters between the mounting surface and the water heater. ▶ Do not restrict air intake openings in any way. ▶ Keep water heater sides clear and unblocked. DANGER: ▶ The gas type conversion must only be carried out by a qualified contractor. 4.
Installation instructions DANGER: Explosion hazard! ▶ DO NOT connect to an unregulated or high pressure propane line or to a high pressure commercial natural gas line. DANGER: Explosion hazard! ▶ The heater must be isolated from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0.5 psig (14" W.C.).
Installation instructions 4.8.1 Gas Line Sizing Tables for NATURAL GAS For your convenience, see below for an excerpt from gas line sizing tables for a single NG appliance. For details, see the current NFPA 54. Required input for 160 000 / 199 000 BTU/hr for the RTG-K-199/160N/X2. The gas supply system must be sized for the combined total maximum BTU/hr load requirements of all gas appliances running simultaneously. The tables below show the maximum capacity of the gas supply pipe in cubic feet per hour.
Installation instructions 4.8.2 Gas Line Sizing Tables for LP GAS For your convenience, see below for an excerpt from gas line sizing tables for a single LP appliance. Their intended use is for pipe sizing between the 2nd stage (low pressure) regulator and the appliance. For details, see the current NFPA 54. Required input for 160 000 / 199 000 BTU/hr for the RTG-K-199/160N/X2.
Installation instructions 4.9 Water quality Water quality can have an impact on appliance longevity. Water supplied to the RTG-K-199/160N/X2 must be in accordance with table 11 and fig. 11. For water analysis data call your local water department, or if on a well, have well water analyzed periodically. Heavy scale will form if the combination of water total hardness and pH exceeds the values specified in fig.
Installation instructions WARNING: Appliance damage! connected to an extension on a “T” fitting can be connected to the hot water line. ▶ Support all piping. Appliance will overheat if not filled with water ▶ Ensure that the appliance is filled with water by opening a hot water faucet, before plugging in the water heater to the power supply. ▶ The use of unions when connecting water pipes to the inlet and outlet connections is required. This will facilitate any necessary servicing.
Installation instructions This appliance has been designed to permit recirculation by controlling an external pump. For this function a cable has been provided to electrically connect the external pump to the appliance. All the features of recirculation ( section 6.5.4 A1 Recirculation) can be used. Please be aware that the cable does not provide 120 VAC to operate the recirculation pump, it is a dry-contact switching external voltage of up to a maximum of 5 amps. Fig.
Installation instructions Set point 1 Adjustable within hidden RS menu (2-18F) Pump OFF 6 10F 2 5 Pump ON Water temp in loop (inlet water NTC) 4 3 6720817984-46.1V Fig. 17 N G L Pump activation and deactivation thresholds Comfort level Delta T ( °F) 1 18 6720817984-47.1V 2 16 Fig.
Installation instructions • Insulate pipes to prevent heat loss For external pump sizing please refer to the pressure drop curves, fig. 21. Also remember to account for system piping pressure loss. A minimum of 1.7 GPM is recommended to provide adequate flow through the water heater when determining the size of the primary pump. Fig. 19 Cascading installation example RTG-K-199/160N/X2 tankless water heaters are approved for use in combination DHW and space heating applications (open loop setup).
Installation instructions Fig.
Installation instructions Fig.
Electrical connections 4.17 Measuring gas pressure 4.17.1 Gas supply pressure Confirm gas pressure upon installation. Connecting manometer ▶ Shut off gas supply at installer supplied shutoff valve for this water heater. ▶ Locate the inlet gas pressure test port (see Fig. 22). ▶ Loosen the screw inside test port fitting (do not remove) and connect the manometer tube to the test port (see fig. 22). 6720813642-14.2V 1 Fig.
Electrical connections ▶ Press the four snaps of the control unit and remove the cover. DANGER: Electric shock! ▶ 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 Electric Code, ANSI/ NFPA 70, or in Canada, all electrical wiring must comply with the local codes and the Canadian Electrical Code, CSA C22.1 Part 1. DANGER: Electric shock! Shock hazard: line voltage is present.
Operating Instructions 6.1 6 Operating Instructions For your safety read before operating your water heater WARNING: 3 1 4 Explosion hazard! ▶ If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. 5 2 NOTICE: Appliance malfunction! 6720806146-02.1V Fig.
Operating Instructions To increase setpoint temperature limit of the appliance: ▶ Access the menu SL - temperature Limit ( section 6.5.5). A lower temperature set point will reduce the risk of scalding, reduce energy consumption and increase the longevity of the heat exchanger. 6720806146-03.1V WARNING: Fig. 28 The temperature shown on the display is device measured, always check with your hand before bathing children or elderly. To shut down the appliance: ▶ Press the button 6.3 .
Operating Instructions 6.4.1 Programming the default setpoint temperature Available menus Display Description P4 6720806146-05.1V Fig. 31 ▶ Press the buttons to be memorized. ▶ Press the button point temperature. and to select the temperature for 3 seconds to save the default set Information (section 6.5.1) P7 Gas Type P9 Purge (section 6.5.2) PC Cascading SA Settings (section 6.5.4) LM Temperature Limit (section 6.5.
Operating Instructions ▶ Press buttons or to choose the following information. – OD (Operation Data) – FH (Failure History) ▶ Press the button to select the desired information. Table 17 Total of cycles OD (Operation Data) In this example, the numbers of cycles is: 4061776. Allows you to view various parameters of the current operation of the appliance. ▶ Press buttons or to choose the following information: In the calculation of number of cycles, 1 cycle means 1 ignition.
Operating Instructions Use this menu only after installing the cascading kit. ▶ Access to information / adjustments menu. Display shows P4 (Information). ▶ Press the button until the display shows SA (Settings). ▶ Press the button . Display shows E. ▶ Press buttons or to choose the following information. – E Exit – A0 Time – A1 Recirculation – A8 Startup Delay – A9 Units Set – Ab Region Selection – rS Recirculation Settings ▶ Press the button to select the desired information.
Operating Instructions ▶ Press buttons or to scroll through the options. – OF OFF – rE House Recirculation - Hot water readily available at faucets. – tI Tank Loading Internal NTC - Tank loading using the water heater’s inlet water temperature sensor to control the pump. – tE Tank Loading External NTC - Tank loading using the external temperature sensor to control the pump. – tA Tank Loading Aquastat - Tank loading using the external temperature sensor to control the pump.
Operating Instructions ▶ Access to information / adjustments menu. Display shows SA (Settings). ▶ Press the button until A9 (Units) is in the display. ▶ Press the button . ▶ Press the buttons or to select measurement units, – °C - Metric (l/min) – °F - Imperial (gal/min) ▶ Press the button for 3 secs. to save the selected units. The selected unit blinks. ▶ Press the button to exit units menu. AB (Region Selection) ▶ Press the button . Display shows following menu.
Operating Instructions 6.5.11 P1 - Max. Power (Ionization control) Default setting is Off. ▶ Only a qualified technician can change this parameter. 6.5.12 P0 - Min. Power (Ionization control) Default setting is Off. ▶ Only a qualified technician can change this parameter. 6.6 6.6.2 BP (Bypass Valve Auto Calibration) ▶ Open one hot water faucet. Flow rate between 0.80 GPM and 1.80 GPM is required. It's possible to confirm this value by entering BP Bypass Valve Auto Calibration menu. ▶ Access menu PA.
Operating Instructions 6.7.1 Gas conversion from NG to LPG DANGER: Fatal accidents! Before any service or testing in the appliance, ▶ Turn off the appliance. ▶ Disconnect the power supply cord. ▶ Shut off the gas supply. The gas type conversion must only be carried out by a qualified contractor. ▶ Turn Off the appliance. ▶ Remove the front cover from the appliance ( section 3.3.2). ▶ Remove the four screws that retain the cover plate to the gas manifold, see fig. 37 (plate in grey color). Fig. 37 Fig.
Maintenance and service 7 Maintenance and service The flue gas restrictor must be assemble in the exhaust grill. WARNING: ▶ Install the flue gas restrictor in the exhaust grill. Maintenance must be done by a trained or qualified contractor. DANGER: ▶ Always shut off the electrical power supply, shut off the manual gas valve and shut off the water valves whenever servicing. WARNING: Fig. 40 ▶ Assemble the front cover in the appliance. ▶ Replace all dismantled seals and o-rings with new ones.
Maintenance and service 2) Proceed with heat exchanger descaling whenever error codes AA and E5 are displayed (appliance is protected against over heating in case of scaling, see table 11, Water Quality). Condensate Siphon Table 21 • 7.1 • Required annual maintenance • Check for debris and clean if needed. Air Filter (To remove front cover, see page 13) Verify the air filter is clean and undamaged. The air filter is attached to the fan assembly, see fig. 42.
Maintenance and service NOTICE: Use of agents such as anti-freeze is not permitted and voids the warranty, as they may cause damage to the water heater's internal components. 1. Press ON/OFF switch on the water heater to turn OFF the heater and unplug power supply cord. The display should be blank. 2. Shut off gas supply to heater. 3. Shut off the water supply to the water heater using installer supplied shutoff valve. 4. Open hot water faucets to drain and relieve pressure from the plumbing system.
Troubleshooting ▶ Reconnect the electrical supply to the unit, open the water shutoff valves, and return the unit to service. 8.2 Burner does not ignite when a hot water faucet is opened It is recommended to use “P4 Information” page 33, chapter 6.5.1 as a tool for problem solving. Fig. 43 [1] Pump [2] Water filter 8 Troubleshooting WARNING: If you are unable to perform the tasks listed below, or need additional assistance, ▶ Please contact your original installer or a licensed gas technician.
Troubleshooting 3. In areas where the water has a high mineral content, periodic descaling may necessary. See chapter 7.3, page 42 for directions. 5. In areas where the water has a high mineral content, periodic descaling may necessary. See chapter 7.3, page 42 for directions. 8.4 8.6 Water is not hot enough 1. Selected temperature on the unit may be too low. To raise the output temperature, see chapter 6.4, page 32. 2. Confirm the heater's gas type coincides with the type of gas being supplied.
Troubleshooting 8.10 Manifold gas pressure 8.7.1 High pitch noise 1. Verify if correct gas type is selected (see section 6.7). 2. Verify if gas pressure is within specified range (see section 3.2). If gas type is properly selected, gas pressure is within range and the problem persists: 3. Perform the gas and air adjustment as described in section 8.11. Fatal accidents! 8.7.2 Low pitch noise 1. Verify if correct gas type is selected (see section 6.7). 2.
Troubleshooting ▶ Connect the pressure gauge connection "+" to the test point [B]. ▶ Loosen the shutter screw of the pressure head point [A]. ▶ Connect the pressure gauge "-" to the pressure head point [A]. ▶ Turn On the appliance. ▶ Open all hot water faucets to achieve a flow rate of at least 6 gallons per minute. (1 tub and 2 sinks should be sufficient). If heater goes back to P2, open more hot water fixtures to allow sufficient flow and access to P1 menu.
Troubleshooting ▶ Verify if power bar level is at middle point, see fig. 47. In case of failure in the auto calibration process the error sign appears. Verify if: ▶ Any error codes appear on the display. See table 25. ▶ Gas type and pressure are correct. ▶ Wind conditions are stable (e.g. wind gusts may be a cause of failure). ▶ Hot water flow is sufficient and stable (e.g. water from a well is a potential source of water instability).
Troubleshooting ▶ Press the buttons or to adjust parameter value if power bar level is out of range.1) ▶ Press to enter P2 adjustment. Display shows E. ▶ Press or until L2 appears. ▶ Press the button to enter L2. Display shows L2 value. ▶ Verify if power bar level is at middle point, see fig. 47. ▶ Press the buttons or to adjust parameter value if power bar level is out of range.1) ▶ Press the button for 3 seconds and appliance assumes value. The value flashes as a sign of confirmation.
Troubleshooting 8.12 CO emissions check In case air/gas combustion adjustment has been performed check emissions using reference values in tables 23 and 24. ▶ Insert analyzer probe into the measuring port (approx. 1.5" inserted), see fig. 51. 8.12.1 Access to CO2 measuring port WARNING: Only a qualified technician can perform these steps. This can cause carbon monoxide poisoning. ▶ Follow the instructions carefully. Allow the appliance to stabilize before performing CO readings.
Troubleshooting 8.12.2 CO2 and CO values CO2 range (%) Max. CO level (measured) Greentherm 9800 SE/SEC O 199 000 BTU Nat. Gas max. input P1 8.4 % - 9.0 % < 250 ppm min. input P2 N/A < 100 ppm LP Gas max. input P1 9.7 % - 10.4 % < 250 ppm min. input P2 N/A < 100 ppm * Values above are for climate controlled conditions. Inputs such as gas pressure, heating value of the gas, humidity and temperature of combustion air all impact CO and CO2 values.
Problem solving 9 Problem solving 9.1 Error code diagnostics To remove error codes from the display, ▶ Press the ON/OFF button more than 3 sec. (long press). Installation, maintenance and repair must only be carried out by qualified contractors. The following table describes the solutions for possible problems. Display Description Solution A0 Water temperature sensors [17] [19] [20] disconnected or damaged. ▶ Check sensor wire connections.
Problem solving Display Description AA3) ▶ Check flue gas temperature sensor. Condensing unit flue gases temperature [16] above 392 °F (200 °C) and/or flue gases ▶ Check water inlet temperature sensor. temperature [15] above 145 °F (63 °C) at the ▶ Descale appliance ( section 7.3). 1) exhaust sensor [15]. Appliance regulates power to protect against overheating. AD Flue blockage detected during startup due to insufficient combustion air. Appliance power derate and possible reduce of comfort level.
Problem solving Display Description Solution CA Water flow above 9.2gpm. ▶ Disconnect the appliance and purge hydraulic circuit to remove air.1) ▶ Install water flow restrictor.1) ▶ Check water pressure does not exceed 150psi.(section 3.2). CE Excessive flue blockage detected during operation ▶ Reset error (press and hold on/off button for 3 seconds). due to excessive pressure on the siphon. If the problem persists: Appliance shuts down for safety.
Problem solving Display Description Solution E4 Air temperature inside cabinet above 176 °F (80 °C) or 2 minutes above 158 °F (70 °C). Appliance burner cut off to prevent overheating. ▶ Check for flue gas leakage inside the cabinet1) ▶ Reset error (press and hold on/off button for 3 seconds). If the problem persists: ▶ Check sensor resistance [18] (section 11) and replace the sensor if it is not according to specification.
Problem solving Display Description Solution F9 Gas valve driver internal fault. ▶ Check gas valve wire connections.1) If the problem persists: ▶ Replace the wire connections and/or electronic control unit.1) FA Gas leakage in the gas path (gas valve or gas manifold shut-off valves). ▶ Replace the gas valve and/or gas manifold.1) ▶ After gas valve and/or gas manifold replacement perform gas and air tuning ( section 8.11).
Electrical diagram 10 Fig.
Electrical diagram [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] Ionization sensor Fan Ignition electrode Supply Connection for anti freeze kit Connection for remote control Gas valve - Modulation Water bypass valve Electrovalve 3 Electrovalve 1 Electrovalve 2 Gas valve - Solenoide safety Thermofuse Water flow sensor Exhaust temperature sensor Exhaust temperature sensor - Between chambers Water outlet bypass temperature sensor Box temperature
Sensor resistance charts (70) 248 230 212 194 176 158 140 (50) (60) 122 104 86 (20) (30) (40) 50 14 32 -40 -4 TEMPERATURE ºF (ºC) (10) (-40) (-30) (-20) (-10) (0) 68 (80) (90) (100) (110) (120) Sensor resistance charts -22 11 1 0.1 464 428 392 356 320 284 248 212 (100) (120) (140) (160) (180) (200) (220) (240) (80) 176 140 104 68 0.1 1 -4 -40 RESISTANCE (KOHM) 58 6720816948-40.1V 32 TEMPERATURE ºF (ºC) (40) (20) (0) (-20) (-40) 0.01 Fig.
Interior components diagram and parts list 12 Interior components diagram and parts list 12.1 Interior components Fig.
Interior components diagram and parts list Fig.
Protecting the environment 13 Protecting the environment Packing 14 Installer Checklist to be completed by installer upon installation The packing box may be fully recycled as confirmed by the recycling symbol . Components Many parts in the heater can be fully recycled at the end of the product life. Contact your city authorities for information about the disposal of recyclable products. Saving water resources: ▶ Make sure you close all the taps after any use. Avoid leaving the taps dripping.
Installer Checklist to be completed by installer upon installation Checklist to be completed by installer Gas line sized to as needed according to NFPA 54 or CSA B 149 If an LP conversion is the LP kit installed 4.6.2 3.2 Gas line leak checked Gas pressure in range Serial number Serial number is located on the rating plate which is located on the left side (when ______________________________ facing appliance front) of the cover.
Software main menu structure 15 Software main menu structure Fig.
LIMITED TANKLESS HEATER WARRANTY 16 LIMITED TANKLESS HEATER WARRANTY BRADFORD WHITE CORPORATION LIMITED INFINITI TANKLESSΠ K- or L-SERIES WATER HEATER WARRANTY WHAT DOES THIS LIMITED WARRANTY COVER? This limited warranty covers both the heat exchanger and component parts for leakage or other malfunction caused by defects in materials and/or workmanship. It applies to the original consumer purchaser and to any subsequent owner as long as the heater remains installed at its original place of installation.
LIMITED TANKLESS HEATER WARRANTY LIMITED TANKLESS HEATER WARRANTY (CONTINUED) WHAT WILL WE DO TO CORRECT PROBLEMS? 1. If a defect occurs within the heat exchanger warranty period, we will: Provide a replacement heat exchanger of our manufacture (or at our option) repair any unit which develops a leak in the heat exchanger within the warranty period. To obtain a replacement, you must forward both the rating plate from the defective unit to us and a copy of the original sales receipt.
