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Direct Vent Tankless Water Heater
Operation and Installation Manual
Models:
305
505
705
FOR INDOOR APPLICATIONS ONLY
Models 305 and 505 are Energy Star Qualified
Table of Contents .................... 2
Consumer Safety Information .. 4
Operating Instructions .............. 5
Maintenance ............................ 8
Error Codes ............................. 9
Installation Instructions ............ 13
Warranty .................................. 38
INSTALLER: Leave this manual with
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Table of Contents Specifications ..................................................... 3 Installation Instructions ................................... 13 General Instructions ...................................... 13 Consumer Safety Information Clearances from Appliance ........................... 14 Safety Definitions ............................................. 4 Attachment of the Water Heater .................... 14 Safety Behaviors and Practices ....................... 4 Electrical
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Specifications Model 305 505 705 Minimum Gas Consumption Btu/h 15,000 19,000 199,000 Natural Gas Maximum Gas Consumption Btu/h 180,000 237,000 190,000 Propane Gas 0.6 - 7.5 GPM 0.6 - 9.4 GPM 0.6 - 9.8 GPM Hot water capacity (Min - Max) * (2.3 - 28.4 L/min) (2.3 - 35.5 L/min) (2.3 - 37 L/min) 7.4 GPM (28.0 L/min) Natural Gas Hot water capacity (45°F rise) 6.6 GPM (25.0 L/min) 8.8 GPM (33.5 L/min) 7.1 GPM (26.9 L/min) Propane Gas Default Temperature Setting (no contro
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Consumer Safety Information Safety Definitions This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. Indicates an imminently hazardous situation which, if not avoided, will result in death or DANGER serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in death or WARNING serious injury. Indicates a potentially hazardous situation which, if not avoi
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Description of Operation This appliance is one of the most advanced water opened and goes out when the tap is closed. heaters available. It provides a continuous supply of Installation of the temperature controller is highly hot water at a preset temperature. This appliance is recommended. The temperature controller can set the direct vent where air is brought in from the outside and temperature within a specific range and can provide combustion gases are exhausted to the outside.
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Setting the Temperature Hot water can be dangerous, especially for infants or children, the elderly, DANGER or infirm. There is hot water scald potential if the thermostat is set too high. Water temperatures over 125º F (51º C) can cause severe burns or scalding resulting in death. Hot water can cause first degree burns with exposure for as little as: 3 seconds at 140º F (60º C) 20 seconds at 130º F (54º C) 8 minutes at 120º F (48º C) Test the temperature
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Temperature Ranges This water heater will attempt to provide hot water at the temperature setting even when the water flow is varied or when more than 1 tap is in use. The water heater can deliver water at only one temperature setting at a time. The available temperatures for a given model are provided below. Model Temperature Settings Available (ºF) 125 130 135 140 150 160 98 100 102 104 106 108 110 115 120 305 * * * * ** ** 125 130 135 140 150 160 185 505 98
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Maintenance Snow Accumulation WARNING Keep the area around flue terminal free of snow and Turn off the electrical power supply, the manual gas ice. The appliance will not function properly if the valve and the manual water control valve whenever intake air or exhaust is impeded (blocked or partially servicing the unit. blocked) by obstructions. Repairs and maintenance should be performed by a Visual Inspection of Flame qualified service technician. The
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Error Codes This appliance has the ability to check its own operation continuously. If a fault occurs, an error code will flash on the Display of the temperature controller. This assists with diagnosing the fault and may enable you to overcome a problem without a service call. Please identify the code displayed when inquiring about service. Some of the checks below may need to be done by a qualified service technician. Call a WARNING service technician for any remedy that involv
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Error Code Table Code Fault Remedy 14 Thermal Fuse Check gas type of unit and ensure it matches gas type being used. Check for restrictions in air flow around unit and vent terminal. Check for low water flow in a circulating system causing short-cycling. Ensure dip switches are set to the proper position. Check for foreign materials in combustion chamber and/or exhaust piping. Check heat exchanger for cracks and/or separations. Check heat exchanger surface for hot s
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Trouble Shooting for Common Issues I don’t have any hot water when I open the tap. When I open a hot tap, I do not immediately get hot water. Make sure there is gas, water, and electricity to the water heater (power is turned on and the gas is turned Hot water must travel through your plumbing from the on). water heater to the faucet. The time period for hot water to reach your fixture is determined by the amount When I was using the hot water, the water got cold. of w
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In-line Filter Gas Supply Cold Water Line Hot Water Line Flushing the Heat Exchanger (Error Code: LC or 00) An “LC” or “00” error code indicates the unit is beginning to lime up and must be flushed. Failure to flush the appliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the unit’s warranty. After flushing, reset the LC fault code by turning off the power to the unit and turning the power back on. 1. Disconnect electrical power
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Installation Instructions Only properly trained and qualified installers should It is highly recommended that all installers attend a install this appliance. The warranty may be voided due product knowledge class. to improper installation or installation by a non-qualified installer. General Instructions • Follow the installation instructions and those in Care WARNING and Maintenance for adequate combustion and ventilation air. Do not use substitute mat
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Clearances from Appliance to top to Non- to Combustibles Combustibles 305 305 705 705 505 505 Top of 6 inches 12 inches 2 inches 2 inches Heater (152 mm) (305 mm) (51 mm) (51 mm) Back of 0 (zero) 0 (zero) 0 (zero) 0 (zero) to side Heater Front of 6 inches 24 inches 6 inches 24 inches Heater (152 mm) (610 mm) (152 mm) (610 mm) Sides of 2 inches 2 inches 1/2 inch 1/2 inch Heater (51 mm) (51 mm) (13 mm) (13 mm) Floor/ 12 inches 12 inches 12 inches 2 inches
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Electrical Connection The water heater requires a standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet. Plug the 6ft long power cord into the wall outlet. Gas Piping General Instructions stress cracking, the piping shall be rinsed with water • A manual gas control valve must be placed in the gas supply line to the water heater. A union can be after testing, unless it has been determined that the leak test solution is non-corrosive.)
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Gas Piping Pipe Sizing Procedure - Example The gas supply must be capable of handling the entire gas load at the location. Gas line sizing is based on gas type, the pressure drop in the system, the gas pressure supplied, and gas line type. Refer to the National Fuel Gas Code, NFPA 54, for proper gas line sizing. The below information is provided as an example. 1. Determine the cubic feet per hour of gas required by dividing the gas input (on the rating plate) by
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Water Piping General Instructions • A manual water control valve must be placed in the • Toxic chemicals such as those used for boiler water water inlet connection to the water heater before it is treatment are not to be introduced to the potable connected to the water line. Unions may be used water used for space heating. on both the hot and cold water lines for future • If the appliance will be used as a potable water servicing and disconnection of the unit. so
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S 3/4" Gas Connection Gas Supply Minimum 3/4" Wa Cold ter Supply Line Freeze Protection Piping Vacuum Breaker NOTICE Warranty does not cover damage due to freezing. When electrical power and gas are supplied to the water heater, it will not freeze in environments as cold as -30º F when protected from direct wind exposure. Water Heater In the event of a power failure at temperatures below freezing the water heater should be drained of all water to prevent freezing dama
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3/4" Gas Connection Gas Supply 3/4" Cold Water Supply Line Recommended Piping for Basic Installation Water Heater Equipment List QTY Water Heaters 1 Plumbing Installation 1 Kit (Optional) (3/4" Fittings Include: 2 Unions, 2 Ball Valves, 2Drain Valves and 1 Pressure Relief Valve.) 3/4" Hot Water Supply Line For Building Fixtures KEY This is not an engineered drawing. It is intended only as a guide and not as a replacement for professionally engineered project drawings. This drawi
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3/4" Gas Connection Gas Supply Recommended Piping for Circulation Systems NOTE: For residential and commercial applications, this piping arrange- ment maintains full warranty. Water Heater Equipment List QTY Water Heaters 1 Plumbing Installation 1 Kit (Optional) (3/4" Fittings Include: 2 Unions, 2 Ball Valves, 2Drain Valves and 1 Pressure Relief Valve.) For this application: Pump should be controlled by an Aqua- stat, Timer or Combination Aquastat and Timer. Pump to be sized to ma
