Lochinvar EW 150 Designer'S Manual Download Page 1

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DESIGNER’S GUIDE

EFF

WATER HEATER

1 5 0 , 0 0 0 – 3 0 0 , 0 0 0

B t u / h r

Summary of Contents for EW 150

Page 1: ...DESIGNER S GUIDE EFFICIENCY WATER HEATER 1 5 0 0 0 0 3 0 0 0 0 0 B t u h r ...

Page 2: ...uccinct easy to use manner so you can use and share information confidently and with minimal effort However it is important to remember that this guide is not intended to replace our installation manual Installers should still refer to our installation manual for specific installation instructions We hope our manual will make your work easier and more productive As always we greatly appreciate you...

Page 3: ...Aire Vent With Rooftop Air Inlet 10 FIG 10 Horizontal Direct Vent 12 FIG 11 Horizontal Direct Vent Caps 12 FIG 12 Multiple Sidewall Direct Vent Caps 13 FIG 13 Vertical Direct Vent 13 FIG 14 Outdoor Venting 14 TABLE A Clearances From Combustible Construction 3 TABLE B Conventional Venting Vent Connection Size 8 TABLE C E DirectAire Vent Kits 10 TABLE D Horizontal Direct Vent Kits 12 TABLE E Vertica...

Page 4: ...tallation MUST comply with the Canadian Gas Association Code CAN CGA B149 1 and or B149 2 and or local codes LOCATION OF UNIT Locate the unit so that if water connections should leak water damage will not occur When such locations cannot be avoided it is recommended that a suitable drain pan adequately drained be installed under the unit The pan MUST NOT restrict combustion airflow Under no circum...

Page 5: ... in accordance with Section 5 3 Air for Combustion and Ventilation of the latest edition of the National Fuel Gas Code ANSI Z223 1 or in Canada the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment or provisions of the local building codes 3 5 4 L o c h i n v a r D E S I G N E R S G U I D E E F F I C I E N C Y WAT E R H E AT E R 6 1 5 8 8 9 8 9 0 0 3 TA...

Page 6: ...f the two openings should be sized based on a minimum free area of one square inch per 2000 Btu hr 11 cm2 per kW If air is taken from another interior space each of the two openings specified above should have a net free area of one square inch per 1000 Btu hr 22 cm2 per kW input but not less than 100 square inches 645 cm2 Lochinvar 2 FIG 4 COMBUSTION AIR FROM AN INTERIOR SPACE FIG 3 COMBUSTION AI...

Page 7: ...building codes The connection from the appliance vent to the stack MUST be as direct as possible and sized correctly using the proper vent table The horizontal breaching of a vent MUST have at least 1 4 rise per linear foot The horizontal portions shall also be supported for the design and weight of the material employed to maintain clearances prevent physical damage and separation of joints The c...

Page 8: ... Flue gas condensate can freeze on exterior walls or on the vent cap Frozen condensate on the vent cap can result in a blocked flue condition Some discoloration to exterior building surfaces can be expected Adjacent brick or masonry surfaces should be protected with a rust resistant sheet metal plate Vent connectors serving appliances vented by natural draft shall not be connected to any portion o...

Page 9: ...as appliances An interior masonry chimney which is not exposed to the outdoors below the roofline may be used to vent high efficiency gas appliances based on the results of careful inspection proper sizing and local code approval If there is any doubt about the sizing or condition of a masonry chimney it MUST be relined with a properly sized and approved chimney liner system An interior masonry ch...

Page 10: ...h unit is installed with an individual vent and the negative draft is higher than the specified range of 0 02 to 0 05 inches of water column a barometric damper will be necessary Multiple unit installations with combined venting require barometric dampers to regulate draft at each unit The negative draft MUST be within the range of 0 02 to 0 05 inches of water column to ensure proper operation All...

Page 11: ...y I Type B vent material for venting flue products The sidewall or vertical roof top E DirectAire Vent combustion air supply system has specific vent material and installation requirements The air inlet pipe connects directly to the water heater to supply combustion air In most installations the combustion air inlet pipe will be a dedicated system with one air inlet pipe per water heater Multiple ...

Page 12: ...alled at the point of termination for the air inlet pipe The point of termination for the combustion air inlet cap MUST be at least 2 feet 0 6 m below the point of flue gas termination vent cap if it s located within 10 feet 3 05 m of the flue outlet The termination ell on the air inlet MUST be located a minimum of 12 0 30 m above the roof or above normal levels of snow accumulation It MUST NOT be...

Page 13: ...a two pipe system one pipe for the flue products and one pipe for the combustion air supply The flue CANNOT be combined with any other appliance vent or common vent from multiple water heaters The vent on a direct vent system will have a positive pressure in the flue which requires all vent joints and seams to be sealed gas tight The flue from a direct vent system MUST have a condensate drain with...

Page 14: ...e Place the combustion air inlet cap at least 1 foot 0 3 m above ground level and above normal snow levels MULTIPLE UNIT APPLICATIONS Horizontal Direct Vent The combustion air inlet caps for multiple unit installations MUST maintain the minimum 3 foot 0 9 m radius clearance below or horizontally from the closest flue outlet Lochinvar 1 2 L o c h i n v a r D E S I G N E R S G U I D E E F F I C I E ...

Page 15: ... 6m lower than the point of flue gas termination if it is located within 10 feet 3 05 m of the flue outlet Incorrect installation and or location of the air inlet cap can allow the discharge of flue products to be drawn into the combustion process on the water heater This can result in incomplete combustion and potentially hazardous levels of carbon monoxide in the flue products MULTIPLE UNIT APPL...

Page 16: ... outdoor cap must be located 4 feet 1 22m below and 4 feet 1 22m horizontally from any window door walkway or gravity air intake The combustion air inlet of the outdoor cap must be located at least one foot 0 30m above grade and above normal snow levels The water heater must be at least 10 feet 3 05m away from any forced air inlet and at least 3 feet 0 91m outside any overhang Do not install in lo...

Page 17: ... N C Y WAT E R H E AT E R 6 1 5 8 8 9 8 9 0 0 1 5 TABLE H INLET GAS PRESSURE REQUIREMENTS NAT GAS LPG MAX INCHES WATER COLUMN 10 5 w c 13 w c MIN INCHES WATER COLUMN 4 7 w c 8 w c EXAMPLE OF HIGH ALTITUDE APPLICATIONS For example if a unit s input is 200 000 Btu hr at sea level the rated input at 4000 feet of elevation can be calculated by derating input 4 per 1000 feet above sea level Btu hr Inpu...

Page 18: ...rder to ensure that the products of combustion do not condense inside the combustion chamber of the water heater The mixing valve allows the water heater to operate above 140 F to protect from condensation while still allowing a delivery of colder water to the system fixtures Also inherent in this design is the protection of occupants from water containing bacteria such as Legionella Legionella ca...

Page 19: ...ntent between 1 and 6 gallons of the copper finned tube heat exchanger a flow switch is factory installed as a low water cutoff device on models EW 150 through EW 300 The flow switch is installed in the outlet piping from the water heater and wired in series with the ignition system safety controls A flow switch is acceptable as a low water cutoff device on water heaters requiring forced circulati...

Page 20: ...E F F I C I E N C Y WA T E R H E A T E R P I P I N G D I A G R A M S ...

Page 21: ...VE TEE ELBOW UNION EXPANSION TANK CHECK VALVE THERMOMETER COLD WATER SUPPLY BUILDING RETURN INLET OUTLET LOCHINVAR WATER HEATER L E G E N D TABLE J COMMON WATER MANIFOLD PIPE SIZE FOR MULTIPLE WATER HEATER INSTALLATIONS QUANTITY OF WATER HEATERS MANIFOLD PIPE SIZE 1 2 2 3 3 31 2 4 4 5 5 6 6 This illustration is for concept only and should not be used for any actual installation without engineering...

Page 22: ...G HOT WATER SUPPLY LOCHINVAR WATER HEATERS COLD WATER SUPPLY BUILDING RETURN LOCK TEMP STORAGE TANK DRAIN RELIEF VALVE OUTLET INLET This illustration is for concept only and should not be used for any actual installation without engineering or technical advice from a licensed engineer All necessary equipment may not be illustrated COMMON WATER MANIFOLD PIPE SIZE FOR MULTIPLE WATER HEATER INSTALLAT...

Page 23: ...MPERATURE BUILDING RETURN DRAIN INLET OUTLET COLD WATER SUPPLY 1400 F HOT WATER SUPPLY 1800 F HOT WATER SUPPLY LOCK TEMP STORAGE TANK LOCHINVAR WATER HEATER MIXING VALVE CHECK VALVE RELIEF VALVE This illustration is for concept only and should not be used for any actual installation without engineering or technical advice from a licensed engineer All necessary equipment may not be illustrated COMM...

Page 24: ...ET OUTLET INCREASE MANIFOLD SIZE IN DIAMETER FROM TEE TO TANK INCREASE MANIFOLD SIZE IN DIAMETER FROM TEE TO TANK BUILDING RETURN DRAIN LOCK TEMP STORAGE TANK COLD WATER SUPPLY BUILDING HOT WATER SUPPLY This illustration is for concept only and should not be used for any actual installation without engineering or technical advice from a licensed engineer All necessary equipment may not be illustra...

Page 25: ...MP STORAGE TANK DRAIN INLET OUTLET OUTLET BUILDING HOT WATER SUPPLY INCREASE MANIFOLD SIZE IN DIAMETER FROM HERE TO POINT B INCREASE MANIFOLD SIZE IN DIAMETER FROM HERE TO POINT C THERMOMETER This illustration is for concept only and should not be used for any actual installation without engineering or technical advice from a licensed engineer All necessary equipment may not be illustrated COMMON ...

Page 26: ... FRAME W WATER HEATERS AND STORAGE TANK LIT0665 A6 L o c h i n v a r D E S I G N E R S G U I D E E F F I C I E N C Y WAT E R H E AT E R 6 1 5 8 8 9 8 9 0 0 MODEL HEATER INLET MANIFOLD NUMBER OUTLET SIZE PIPE SIZE EW 150 300 2 3 ...

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Page 28: ...Lochinvar Corporation 615 889 8900 Fax 615 547 1000 www Lochinvar com EW DG 03 5M 2 06 Printed in U S A ...

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