Lochinvar water heater error codes

pool and spa heater, for homeowners who want the best of everything. Lochinvar, LLC 300 Maddox Simpson Parkway Lebanon, Tennessee 37090 P: 615.889.8900 / F: 615.547.1000 Lochinvar.com 10/2023 - Printed in U.S.A. HLW Optional ERP-05 (Reprint ERP-05 5/22) ® For technical information call 800-722-2101. Lochinvar, LLC reserves the

RESIDENTIAL WATER HEATER PARTS LIST MODELS: MDN03030, 04030, 05040 Series 102 PRINTED IN U.S.A. 10/11 PART NO. 323393-000 Lochinvar Parts & Service Department 300 Maddox Simpson Pkwy, Lebanon, TN 37090. Phone: 615-889-8900 • Fax: 615-882-2918 Email: [email protected] Lochinvar LLC 300 Maddox Simpson Pkwy, Lebanon, TN 37090. 1-615-889-8900Replace defective gas control. When thermocouple tip is not in contact with pilot flame, insert it properly. 7. Insufficient Hot Water. Follow lighting instructions correctly – lit heater and turn on the thermostat. Regulate the temperature to desired heat. Allow more time to heat water.National Standard Code C22.2, No. 110-M90. This water heater must be installed in accordance with local codes. In the absence of local codes, install this water heater in accordance with the latest edition of the National Electrical Code. The warranty for this water heater is in effect only when the water heater is550 = Water heater with maximum heat input of 25,5 kW 750 = Water heater with maximum heat input of 32,0 kW 1250 = Water heater with maximum heat input of 57,8 kW Condensing, indoor, pre-mixed, ecological gas water heater. 2 - …6 100166258* pressure switch, 1.35" water column all 7 100148403* high limit assembly, 175 deg all asme 7 100208570* high limit over temp all non-asme 8 100208553* inlet sensor all 9 100208548* outlet sensor all 10 100286274* sealed integrated control all 11 100165932* ignitor, spark all 12 100165921* flame sensor all 13 100277852 transformer ...Fin copper ii lochinvar cf Lochinvar copper fin2 Lochinvar copper-fin ii 2072 water heater user's information manual pdf Lochinvar copper-fin ii wat Lochinvar copper-fin cb 495 user manual pdf downloadFin copper lochinvar ii manualslib 2072 manual Lochinvar copper-fin boilers cbn0747 user's manualLochinvar fin.The data plate also includes a QR code, providing easy access to product information for Service Engineer(s). EcoSword water heater 9 models Lochinvar EcoSword water heaters EcoSword fully condensing gas-fired water heaters are available in 9 models, with storage capacities ranging from 163 to 388 litres and hot water recovery rates from

PARTS AND SERVICE DEPARTMENT. Nashville, Tennessee. 615-889-8900 • Fax: 615-547-1000. www.Lochinvar.com. next. Appliance manuals and free pdf instructions. Find the user manual you need for your home appliance products and more at ManualsOnline.switch is not making. • Check water heater pump operation on a call for heat. • Check for closed valves or obstructions in the water. heater piping. • Verify system is full of water and all air has been. purged from the system. • Check for loose or misplaced jumpers if flow switch is. not installed. Blown fuse.LIMITED RESIDENTIAL WATER HEATER WARRANTY ... plumbing, housing or building codes, or II) without a certified American Gas Association, ASME, or comparable combination temperature ... Lochinvar, LLC. • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: 615-547-1000 www.Lochinvar.com RES-WAR-06I have a RUUD PVP50F natural gas power vent hot water heater. It seemed to be working fine yesterday, but today it was flashing a code that indicates "flame lost." Probable causes (in the manual) are, … read more Have this water heater serviced/inspected by a qualified service technician at least annually. Failure to comply with the above could result in severe personal injury, death or substantial property damage. When calling or writing about the water heater – Please have the water heater model and serial number from the water heater rating plate. Manufactured Home Gas Water Heaters. These models deliver up to 38,000 Btu/hr. Manufactured Home Models from 30 to 50 Gallons. Gas Inputs from 30,000 to 40,000 Btu/hr. Glass Lined Steel Tank with Protective Anode Rod. Electronic Operating Control with Diagnostic Indicator Lights. Meets Federal Energy Conservation Standards Effective April 15, 2015.Whirlpool washers are known for their reliability and efficiency in cleaning clothes. However, like any other appliance, they can sometimes encounter issues that may result in erro...

water heater is available in 119 gallon capacity ... • Code Compliance - Meets the U.S. Department of Energy ... Lochinvar, LLC 300 Maddox Simpson Parkway Lebanon, Tennessee 37090 P: 615.889.8900 / F: 615.547.1000 Lochinvar.com For technical information call 800-722-2101. Lochinvar, LLCTurn the gas valve switch to the “OFF” position. Use a ruler to measure the distance from the base of the fan to the end of the air shutter (FIG. 2-7). Compare this distance to the specified “A” dimension for the pool heater in Table 2B. Turn all gas valve knobs and the manual gas cock to the “OFF” position.TTW are circulating-type Water Heaters, available in 2 models the largest of which is capable of generating 9912 litres of hot water per hour. As circulating-type units they are designed for use with separate storage vessel (s). These units generate fast-recovery hot water in a high-efficiency stainless steel heat exchanger, which is then ... The SHIELD commercial gas water heater is a complete water heating system beautifully packaged in a small footprint. 10 models from 125,000 to 500,000 Btu/hr. Up to 96% Thermal Efficiency. Longer Vent Runs - 150 ft. Exhaust and 150 ft. Air Intake. BMS Integration with BACnet and Modbus. View and Download Lochinvar LTN07575 instruction manual online. RESIDENTIAL GAS WATER HEATERS. NOT FOR USE IN MANUFACTURED (MOBILE) HOMES. LTN07575 water heater pdf manual download. Also for: Ltn10075, Ltl07575st, Ltn10075st, Ltl10075st, Ltl07575, Ltl10075, Ltn07575st.

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Turn the main power switch to the "OFF" position. Shut off gas supply at the field installed manual gas cock in the gas piping to the appliance. If fuel supply is LP gas, shut off gas supply at the tank. On ER152 - ER202 models remove the 1/8" hex plug, located on the "inlet" side of the gas valve.Any time an error, fault or function code is displayed, service will be required. Please Note: Any failure of the heat pump will result in an automatic switch to the resistance heat mode to ensure a constant supply of hot water. For service and support on the GeoSpring Hybrid Electric Water Heater, please contact 1-888-443-4394, Monday - Friday ...Call or contact Lochinvar LLC, 300 Maddox Simpson Pkwy, Lebanon, TN 37090. Phone: 1-615-889-8900 or visit our website at: www. lochinvar.com. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor. Dealer replacements are made subject to in ...Hot Water Solutions Since 1939 | Lochinvar | Lochinvar

Page 52 Installation & Service Manual Start-up Check flame and combustion Replace the flue sensor and grommet into the vent 1. Shut the water heater down by pressing the UP button for connection. five (5) seconds. Place the Shield water heater back into normal operation. 2.The outlet water temperature has exceeded the 210°F manual reset high limit (MRHL) setting. • Verify that the system is full of water and that all air has been properly purged from the system. • Verify that the boiler is piped properly into the heating system. • Check 120 vac to pump motor on a call for heat.Bosch is a well-known brand of tankless water heaters that are commonly used by many homeowners.Freeze protection pump on. In order to prevent the water in the heater from freezing, the SMART SYSTEM control turns on the boiler pump whenever the inlet temperature goes below the minimum temperature. The range of this parameter is 32°F (0°C) to 104°F (40°C). The default value is 45°F (7°C).There should be an air gap between the trap and the drain. Remove and clean the trap and re-work the drain to provide an air gap. The boiler pictured has an internal trap, so you don't see it. It sits above, inside the boiler. 8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour.Table 3-4 Troubleshooting Chart - Fault Messages Displayed on Boiler Interface, Gas Pressure SW, Flow Switch/ LWCO, Blocked Drain SW. 1 48. Download 48 pages, 2.14 … Turn the gas valve switch to the “OFF” position. Use a ruler to measure the distance from the base of the fan to the end of the air shutter (FIG. 2-7). Compare this distance to the specified “A” dimension for the pool heater in Table 2B. Turn all gas valve knobs and the manual gas cock to the “OFF” position. as possible error codes for easy diagnosis. For more information on error codes, see “Lighting the Pilot / Diagnostic Flash Codes” on page 9. Pilot flame heats thermopile, …Its next generation fire tube design can provide hot water supply and space heating faster and more efficiently than ever before. The easy-to-use set up wizard lets you program the boiler in less than two minutes for faster installation. Input: 150 MBH. 95% DOE AFUE efficiency. Modulating burner with 10:1 turndown.INSTALLATION AND SERVICE MANUAL. GAS HEATERS FOR COMMERCIAL POOL APPLICATIONS 500,000 - 2,070,000 Btu/hr MODELS Starting Serial #F0600187510. CPE-I-S-14. WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.Sep 19, 2023 · To reset a Lochinvar water heater, first turn off the power supply. Then, locate the reset button on the thermostat and press it. After pressing the reset button, turn the power supply back on. Make sure to check if the water heater is functioning correctly after resetting. If the issue persists, you may need to consult a professional.

Lochinvar WATER HEATERS manual . 1. 12. Download 12 pages, 298.73 Kb. 1 . STAINLESS STEEL INDIRECT ... Check Code List for Toshiba RAV-SP1102UT-E ...

Hot Water Solutions Since 1939 | Lochinvar | LochinvarUnderstanding and Addressing Water Heater Issues. Water heaters are an essential component of modern homes, providing the comfort of hot water for daily activities such as bathing, cooking, and cleaning. However, like any appliance, they can encounter issues that disrupt this convenience. One common problem homeowners may face is a ...Copper-Fin II® Commercial Gas Boilers. Along with high thermal efficiency, gasketless heat exchangers and multiple venting options, the Copper-Fin II now features Lochinvar's exclusive SMART SYSTEM™ control. 9 Models from 399,000 to 2,070,000 Btu/hr. 85% Thermal Efficiency. Up to 4:1 Proportional Firing. Heavy Duty, Gasketless Heat Exchanger.Lochinvar Copper-Fin II CFN0752 Installation And Operation Manual (80 pages) Lochinvar Water Heater User Manual. Brand: Lochinvar | Category: Water Heater | Size: 7.97 MB.Part Number 100208566 Outlet Sensor/ High Limit Shield. SKU: 100208566. $5695 $6700 Save $10.05. Part Number 100277785 Pump Assembly, 3 Speed, 1/6 HP, Wet Rotor, 1-1/4'' Flange, SS for SNA286. SKU: 100277785. $1,04160 $1,30200 Save $260.40. Part Number 100276591 Heat Exchanger for SNR201-100, SNA201-100.The bottom of the boiler has a 3/4 inch pipe for connection of a 3/4 inch PVC pipe (FIG. 2-2). Slope condensate tubing down and away from the boiler into a drain or condensate neutralizing filter. Condensate from the Noble Combi Boiler will be slightly acidic (typically with a pH from 3 to 5).The durability of lochinvar water heaters is highly regarded, as users mention that the units have lasted for several years without any major issues. Numerous customers have mentioned the energy-saving features of lochinvar water heaters, which contribute to lower utility bills and a smaller carbon footprint.

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Boiler Lochinvar 45,000—500,000 Btu/hr Models Installation And Service Manual Water heater/domestic hot water supply boiler (48 pages) Boiler Lochinvar Copper-Fin 497 User's Information Manual IF YOU ARE UNSUCCESSFUL, CONTACT RESIDENTIAL TECHNICAL ASSISTANCE AT 1-615-889-8900 OR VIA E-MAIL AT [email protected]. KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE WHEN EVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED. PRINTED IN THE U.S.A 0911. PART NO. 322827-000. The data plate also includes a QR code, providing easy access to product information for Service Engineer(s). EcoSword water heater 9 models Lochinvar EcoSword water heaters EcoSword fully condensing gas-fired water heaters are available in 9 models, with storage capacities ranging from 163 to 388 litres and hot water recovery rates fromFreeze protection pump on. In order to prevent the water in the heater from freezing, the SMART SYSTEM control turns on the boiler pump whenever the inlet temperature goes below the minimum temperature. The range of this parameter is 32°F (0°C) to 104°F (40°C). The default value is 45°F (7°C).Product by Lochinvar | 06/24/2008. The new Energy Saver Indirect Water Heater from Lochinvar saves homeowners money and protects the environment by using the same energy to hydronically provide hot water for potable use. By sharing heat for two purposes, the Energy Saver Indirect offers incredible energy efficiency. The Energy Saver Indirect is an indirect-fired, potable water storage vessel ...Copper-Fin II® Water Heaters. In 1993, Lochinvar introduced the first horizontal chassis, copper-finned tube water heater with fan-assisted combustion. 9 Models from 400,000 - 2,070,000 Btu/hr. 85% thermal efficiency. 4:1 Turndown Ratio. Gasketless Copper-Finned Tube Heat Exchanger. SMART SYSTEM™ Operating Control with a Built-in Cascade ...Connect a field supplied 3/4" diameter hose to a drain pan. Using field supplied means, cover the refractory in the back of the combustion chamber of the heat exchanger. 6. Use a vacuum cleaner to remove any accumulation on the water heater heating surfaces. Do not use any solvent.Domestic hot water is from two electric hot water tanks. Problem with boiler is as follows. N05 code: increased fan speed low flame current. So I replaced flame sensor since it looked pretty cooked. It still throws N05 code. Replaced to gas furnace which heats house better than hydronic air handler, also warm outside.by this water heater. all technical and warranty questions: should be directed to the local dealer from whom the water heater was purchased. if you are unsuccessful, please contact the company listed on the rating plate on the water heater. 300 maddox simpson parkway lebanon, tn 37090 phone: 615-889-8900 • fax: 615-547-1000Page 31 TB-A028-06 - A. O. SMITH - FVIR INTELLI-VENT TROUBLESHOOTING CHART LED STATUS PROBLEM SOLUTION The self diagnostic test has 1 Turn off power to the water heater. Ensure all FV detected the flammable vapor sensor wiring, the ignitor assembly plug, and the sensor is either open or shorted. ….

Encounter an error code on your Rheem hot water heater? Watch our video for a step-by-step guide on troubleshooting the most common error codes, including Ec...Water heaters raise the temperature of water for use in bathing, cooking, irrigation, industry and other hot-water applications. Here’s how the three basic types of water heaters w...Aug 2, 2023 · August 2, 2023. Home Type Water Heater. Yes, lochinvar is a reliable and highly rated water heater brand. With advanced features and durable construction, lochinvar water heaters provide efficient and consistent performance for your hot water needs. Offering a wide range of models and options, lochinvar ensures that you can find the perfect ... Welcome to the world of Lochinvar error codes, where troubleshooting meets innovation! As a seasoned expert in decoding error messages, I'm here to guide youResidential Heat Pump Electric Water Heater This high-efficiency heat pump delivers electric water heating using both 208V and 240V power sources. 50-, 60- and 80-gallon capacities This gas-fired water heater is design certified by CSA International as a Category IV vented heater, under Water Heater Standard ANSI Z21.10.3 • CSA 4.3 (current edition). QUALIFIED INSTALLER OR SERVICE AGENCY Installation and service of this water heater requires ability equivalent to that of a Qualified Agency (as defined by Note: Never exceed the maximum recommendation flow rate for the connecting pipe. And remember, you must ensure that the water flow is not obstructed. It's possible that there's air in the pipes. Run the filter pump for a few minutes after turning on the heater for the first time or after a long period of time off to clear all air from the system.ERROR 001 – This code hints at a flow or pressure anomaly in the water system. ERROR 002 – A signal that points towards troubles in the venting setup. ERROR 003 – Indicates issues concerning the igniter or flame sense rod. ERROR 004 – Typically associated with problems in the gas supply or combustion mechanism.The Lochinvar SSS series indirect water heater (FIG. 1-1) is designed to generate domestic hot water in conjunction with a hot water boiler using forced boiler water circulation. This indirect water heater consists of a 444 Stainless Steel tank in which a smooth 304 stainless steel coil is located. Lochinvar water heater error codes, LIMITED RESIDENTIAL WATER HEATER WARRANTY ... plumbing, housing or building codes, or II) without a certified American Gas Association, ASME, or comparable combination temperature ... Lochinvar, LLC. • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: 615-547-1000 www.Lochinvar.com RES-WAR-06, Encounter an error code on your Rheem hot water heater? Watch our video for a step-by-step guide on troubleshooting the most common error codes, including Ec..., My name is ***** ***** I am happy to assist you today. I have been a licensed HVAC contractor for 32 years and a veteran in the industry for 47 years., ARMOR® Wall Mount Condensing Commercial Water Heaters. Fully condensing gas water heaters with 96% thermal efficiency. Models from 125,000 Btu/hr to 199,000 Btu/hr. 96% Thermal Efficiency. 5:1 Turndown Ratio. Space Saving Wall Mount Design. SMART SYSTEM™ Operating Control with a Built-in Cascading Sequencer. Technical Documents., 13. Water outlet (system supply) The water outlet is the water connection for water leaving the boiler and entering the system. Boiler connection is 1". 14. Water inlet (system return) The water inlet is the water connection for water entering the boiler from the system. Boiler connection is 1". 15. Gas connection pipe Threaded pipe connection ..., August 2, 2023. Home Type Water Heater. Yes, lochinvar is a reliable and highly rated water heater brand. With advanced features and durable construction, lochinvar water heaters provide efficient and consistent performance for your hot water needs. Offering a wide range of models and options, lochinvar ensures that you can find the perfect ..., View and Download Lochinvar PVL 07575 installation and operating manual online. POWER VENTED GAS WATER HEATERS SERIES 210/211. PVL 07575 water heater pdf manual download. Also for: Pvn 07575, Cvn075075, Cvl075075., Lochinvar Copper-Fin 2® commercial pool heaters are the first to offer non-condensing, copper-finned innovation and dependable performance. 8 Models from 500,000 to 2,070,000 Btu/hr. Up to 85% Thermal Efficiency. Optional Cupro-Nickel Heat Exchanger (Standard on 1802-2072 Models) Bronze Header Option Available on All Models., This water heater must be installed in accordance with local codes. In the absence of local codes, it must be installed in compliance with the National Fuel Gas Code (ANSI Z223.1-Latest Edition), or in Canada CAN/CGA B149.1 ... This water heater must be located in an area where the general public does not have access to set temperatures. 3 TNR ..., Lochinvar KMA050KD: Design and features. This 4,500-watt, 240-volt hot water heater uses two copper-sheathed, zinc-coated heating elements inside that are designed to resist corrosion. In addition, the steel tank has a glass lining to protect the tank from rust. This water heater also comes with a brass drain valve built for durability., Lochinvar SNR151-100 - 90 Gallon - 150,000 BTU Shield Commercial Water Heater (Nat Gas)- The SHIELD commercial water heater delivers best-in-class innovation from Lochinvar. It operates at 96% thermal efficiency, and provides a 100% effective defense against a water heater's worst enemy - lime scale buildup inside the tank. <br><br> Lime scale buildup insulates the water from the heat source ..., Lochinvar’s Heat Pump hybrid electric models are available in 50, 66 and 80 gallon capacities ... STANDARD FEATURES • ENERGY STAR ® - The Heat Pump water heater meets the ENERGY STAR requirement with up to 3:45 Uniform Energy Factor in hybrid mode and is eligible for most utility rebate ... set point and fault codes. • Immersion …, Lochinvar GTN04040 - 40 Gallon - 40,000 BTU Energy Saver Residental Water Heater (Nat Gas)- Standard Features: Code Compliance - The Energy Saver residential gas water heater meets the National Appliance Energy Conservation Act (NAECA) Energy Factor requirements effective April 16, 2015. Meets the thermal efficiency and standby loss requirements of ASHRAE/IES 90.1., Fortunately, most Lochinvar water heaters have a reset button on the thermostat. If not, you can always perform a hard reset of the whole device by flipping the breaker or unplugging it from the outlet. This post will explore which models of Lochinvar have reset buttons, how to perform a hard reset, and what you can explore if a reset fails., The SHIELD water heater boasts a 5:1 turndown ratio and can fire at as low as 20% input and increase to 100% at peak demand. Monitor your SHIELD heater with optional CON•X•US® Remote Connect to get alerts on changes in your system’s status. Seven venting options allow installers to set up the SHIELD water heating system with ease., Turn the gas valve switch to the “OFF” position. Use a ruler to measure the distance from the base of the fan to the end of the air shutter (FIG. 2-7). Compare this distance to the …, Summary of Contents for Lochinvar HS 50. Page 1 Instruction Manual COMMERCIAL ELECTRIC WATER HEATERS MODELS HS 50/80/119 Series 100 & HC 50/80/119 Series 100 INSTALLATION - OPERATION - SERVICE MAINTENANCE - LIMITED WARRANTY 300 Maddox Simpson Parkway Lebanon, TN 37090 Technical Service Phone: 1-800 …, Turn the gas valve switch to the “OFF” position. Use a ruler to measure the distance from the base of the fan to the end of the air shutter (FIG. 2-7). Compare this distance to the specified “A” dimension for the pool heater in Table 2B. Turn all gas valve knobs and the manual gas cock to the “OFF” position., How to fix it: Check that pool pump is receiving enough water. Ensure that your pool pump is sending water to the heat pump. For variable speed pool pumps, try putting the pump speed up a notch Check for any clogs or backups causing poor water circulation. The same is true if what you use is in your pool is the Raypak pool heater., Contact. Address 11160 Grace Avenue Fountain Valley, CA 92708. Toll Free 1-866-766-7489 Hours: M-F 5am-6pm PST Saturday 6am-3pm PST, For nearly 80 years, Lochinvar, an American company, has been a leader of innovation and high-efficiency water heating. Through Lochinvar's pride in leadership and commitment to excellence, the company has continually improved year after year. Today, Lochinvar touts the broadest line of high-efficiency water heating solutions, a world …, 8 • Residential Standard Gas Water Heater Service Handbook BASICS Scalding Risk A water heater can make water hot enough to cause severe burns instantly, resulting in severe injury or death. Higher temperatures increase the risk of scalding, but even at 120°F, hot water can scald. See Table 2. Thermostatic mixing valves at each, The outlet water temperature has exceeded the 210°F manual reset high limit (MRHL) setting. • Verify that the system is full of water and that all air has been …, Solar Hot Water Generator. Our solar hot water generators provide high-capacity hot water storage for the energy harvested from the sun. Capacities from 120 to 940 gallons. Glass-lined tank. Shipped pre-assembled and tested. Magnesium anodes protect against corrosion., These parameters can be changed by the installer by accessing the Set point 1 at High Outdoor Temp 1, Set point 2 at High Outdoor Temp 2 and Set point 3 at High Outdoor Temp 3 parameters. The temperature range of this parameter is 68°F (20°C) to 190°F (88°C). The default value is 70°F (21°C)., View and Download Lochinvar PVL 07575 installation and operating manual online. POWER VENTED GAS WATER HEATERS SERIES 210/211. PVL 07575 water heater pdf manual download. Also for: Pvn 07575, Cvn075075, Cvl075075., Refer to the Water Connections Section of. Manuals / Lochinvar / Household Appliance / Water Heater Lochinvar 402, 2072 Troubleshooting continued, Fault, Description, Corrective Action, Service Blk, The Lochinvar Copper-Fin II is one of the most advanced water heaters on the market. Its innovative design features gasketless heat exchangers, glass-lined headers, and copper-finned tubes. The units meet ASME construction standards and come with a ten-year limited warranty. This copper-fin boiler offers 85% thermal efficiency, which …, 41 - 50 gal. Water Heater Type: Tall. Watts: 4.5 kW. 0. Shop for 50 gal. Tall 4.5kW Residential Electric Water Heater from Lochinvar At Ferguson. Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and MRO products., With proper maintenance, a Rinnai tankless water heater can last for 20 years or more. This is significantly longer than the average lifespan of a traditional water heater., My name is ***** ***** I am happy to assist you today. I have been a licensed HVAC contractor for 32 years and a veteran in the industry for 47 years., 10 Models from 400,000 to 4,000,000 Btu/hr. Up to 99% Thermal Efficiency. AWH0400NPM- AWH1000NPM 10:1 Turndown Ratio. AWH1250NPM - AWH4000NPM 5:1 Turndown Ratio. Direct Vent Flexibility Up to 150 …, When it comes to maintaining a pool, having a reliable heater is essential for ensuring a comfortable swimming experience. However, encountering error codes