Lochinvar COPPER-FIN CW 645 User's Manual
Contents
1. 4 Lochinvar V High Efficiency Water Heaters Boilers and Pool Heaters JFL 3 COPPER FIN WATER HEATER 495 000 2 065 000 Btu hr Dear Specifier Project Manager At Lochinvar we have long recognized the importance of innovation to any product or service Those who enter into business must also accept the challenge of meeting constantly changing needs The designer s guide you are now holding has been designed to make it more convenient for you to select the perfect Lochinvar water heater for your projects and provide correct specifications for your teams All information has been organized and presented in a succinct easy to use manner so you can use and share information confidently and with minimal effort However it 1s important to remember that this guide 1s not intended to replace our installation manual Installers should still refer to our installation manual for specific installation instructions We hope this manual will make your work easier and more productive As always we greatly appreciate your input on additional improvements for the future Thanks once again for specifying the Lochinvar family of quality standard and custom built water heaters and boilers Sincerely Lochinvar High Efficiency Water Heaters Boilers and Pool Hea Lochinvar Corporation Nashville TN 615 889 8900 Fax 615 547 1000 Table of Contents COdeS such eek 2 Combustion2. E M FULL PORT SYSTEM SYSTEM TEE ELBOW UNION EXPANSION CHECK THERMOMETER BALL VALVE PUMP RELIEF VALVE TANK VALVE A2 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 PIPING DIAGRAM TWO TEMPERATURE INSTALLATION SINGLE HEATER SINGLE TANK 180 F HOT WATER SUPPLY 140 F HOT WATER SUPPLY LOCK TEMP LOW TEMPERATURE STORAGE TANK BUILDING RETURN LOCHINVAR WATER HEATER HIGH TEMPERATURE COLD WATER BUILDING RETURN 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 illustrated E FULL PORT SYSTEM SYSTEM TEE ELBOW UNION EXPANSION CHECK THERMOMETER BALL VALVE PUMP RELIEF VALVE TANK VALVE Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 A3 PIPING DIAGRAM TWO HEATERS SINGLE TANK LOCK TEMP BUILDING STORAGE TANK HOT WATER SUPPLY F gt COLD WATER SUPPLY DRAIN OUTLET BUILDING RETURN Gray shaded area represents common manifold piping Mein Mm gt qj 09 COMMON WATER MANIFOLD SIZE FOR MULTIPLE WATER HEATER INSTALLATION Pipe sizing chart provides minimum pipe size for common manifold piping to ensure adequate flow NUMBER OF COMMON MANIFOLD SIZE NUMBER OF COMMON MANIFOLD SIZE UNITS Min UNITS Min CW 495 745 CW 986 2066 This illu
3. Outlet should be connected to the inlet of the storage tank See Appendix A for Water Heater Piping Diagrams TABLE D GAS SUPPLY PIPE SIZING Length of Pipe In Straight Feet Nominal Iron Pipe Size Inches 10 20 30 40 5 4 309 256 205 174 1 697 477 384 328 11 4 1400 974 789 677 11 2 2150 1 500 1210 1 020 2 4100 2 820 2260 1 950 21 2 6460 4 460 3610 3 100 3 11 200 7 900 6 400 5 400 31 2 23 500 16 100 13 100 11 100 60 141 207 543 830 70 80 90 100 14 171 106 95 79 256 2 210 200 179 149 502 472 44 410 369 308 79 707 666 636 564 472 1 100 871 1 700 1 400 3 000 2 500 6 150 5 130 Maximum capacity of pipe in thousands of BTU s per hour for gas pressures of 14 Inches Water Column 0 5 PSIG or less and a total system pressure drop of 0 05 Inch Water Column Based on NAT GAS 1025 per Cubic Foot of Gas and 0 60 Specific Gravity Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 EXAMPLE OF HIGH ALTITUDE APPLICATIONS For example if a unit s input is 100 000 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 Input 1 00 Elevation 1000 ft x 0 04 Btu hr Input at specified elevation 100 000 1 00 4000 ft 1000 ft x 0 04 Btu hr Input 4000 elevation 100 000 0 84 84 000 Btu hr Input at 4000 ft elevation Lochinvar LOW WATER TEMPERATURE DEL
4. CW 1796 CW 2066 PUMP OPERATION IB The water heater MUST be connected with a properly sized and installed intermittent operating all bronze pump that circulates water between heater and storage tank The pump is sized to heater input and water hardness Should water hardness exceed 25 grains 350 TDS consult factory for pump sizing The pump chart TABLE H is based on the following fittings 6 90 elbows 2 ball valves 2 unions 1 cold water supply tee Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 Due to pump capacity the following specifications cannot be exceeded when using the standard pump Not more than 45 feet of straight pipe For every elbow and tee in excess of those shown above DEDUCT 5 FEET from maximum allowable straight pipe in heater totank circulating loop WATER TREATMENT TABLE G REQUIRED PUMP PERFORMANCE FOR WATER HARDNESS OF 5 TO 25 GRAINS GPM AMPDRAW HORSE _ VOLTAGE POWER PHASE CW 495 745 60 1 4 120 1 CW 986 2066 90 1 2 120 1 In hard water areas water treatment should be used fo reduce introduction of minerals into the system Minerals in the water can collect in the heat exchanger tubes causing noise and inefficient operation Excessive build up of materials in the heat exchanger can cause a non warrantable failure Acceptable Water Quality Levels Maximum Water Hardness 25 Grains Minimum Water Hardness 5 Grains M
5. amp Ventilation Air 5 Contaminants 6 Determining Total Free Area 5 Electrical Requirements 14 SUPP 10 General Venting 6 Location of Unit 2 Low Water Temperature Delivery 12 Outdoor Use 3 Outdoor Installation 9 Pump Operation 12 Relief Valve 14 Venting Options 8 Water Connections 1 Water 13 Water Velocity Control 12 Figures amp Tables Index FIG 1 Models CW 495 2066 Requirements For Installation Over Combustible Floor 3 FIG 2 Water Heater Equipment amp Control Orientation 4 FIG 3 6 Combustion amp Ventilation Air 5 6 FIG 7 Barometric Damper Installation 8 FIG 8 Multiple Unit Barometric Damper Installation 9 FIG 9 Outdoor Venting 9 TABLE A Clearances From Combustible 3 TABLE B Flue Sizes 8 TABLE C Outdoor Kits 10 TABLE D Gas Supply Pipe Sizing 11 TABLE E Inlet Gas Pressure 11 TABLE F Required Temperature Rise 12 TABLE G Required Pump Performance 13 TABLE H Common Water Manifold Sizes 14 TABLE Amp Draw 14 Appendix A Water Heater Piping Diagrams Sin
6. and louvers the total opening must be multiplied by 2 516 25 sq in x 2 1 032 sq in This project requires one Ventilation Air Opening with net Area of 1 032 square inches with louver dimensions of 30 x 35 and one Combustion Air Opening with net Area of 1 032 square inches with louver dimensions of 30 x 35 Lochinvar CAUTION EXHAUST FANS Any fan or equipment which exhausts air from the equipment room may deplete the combustion air supply and or cause a down draft in the venting system If a fan is used to supply combustion air to the equipment room it must by sized such to make sure that it does not cause drafts which could lead to nuisance operational problems with the water heater Btu 22 per kW of input but not less than 100 square inches 645 cm FIG 6 COMBUSTION AIR FROM OUTSIDE SINGLE OPENING EN If a single combustion air opening is provided to bring combustion air in directly from the outdoors the opening must be sized based on a minimum free area of one square inch per 3000 Btu input 7 cm per kW This opening must be located within 12 30 cm of the top of the enclosure CONTAMINANTS Combustion air drawn from an interior or exterior space must be free of any chemical fumes which could be corrosive to the water heater Burning chemical fumes results in the formation of corrosive acids which attack the water heater cause improper
7. combustion and premature failure of the water heater and vent These fumes are often present in areas where refrigerants salts and solvents are used Therefore be aware of swimming pool equipment water softening and cooling system placement VENTING General 11 Water Heaters are classified as Category appliances when tested to the latest ANSI Standard This classification requires all conventionally vented combustion products to be vented using Category listed vent pipe Additionally it is recommended that this vent material be double wall construction or insulated in the field A Category appliance operates with a non positive static vent pressure and with flue loss greater than 17 percent Vent installations for connection to gas vents or chimneys must be in accordance with Part 7 Venting of Equipment of the latest edition of the National Fuel Gas Code ANSI 2223 1 or applicable provisions of the local building codes The connection from the appliance vent to the stack must be as direct as possible and sized correctly The horizontal breeching of a vent must have at least 1 4 rise per linear foot The horizontal portions should also be supported for the design and weight of the material employed to maintain clearances prevent physical damage and separation of joints The connection from the appliance vent to the stack or vent termination outside the building must be ma
8. existing appliances are replaced t NOTE Flue gases will form a white plume in winter Plume could obstruct window view Flue gas condensate can freeze on exterior surfaces or on the vent cap Flue gas condensate can cause discoloration of exterior building surfaces Adjacent brick or masonry surfaces should be protected with a rust resistant sheet metal plate f NOTE Venting of a high efficiency appliance into a cold or oversized masonry chimney can result in operational and safety problems Lochinvar An outdoor unit should not be located so that high winds can deflect off of adjacent walls buildings or shrubbery causing recirculation Recirculation of flue products may cause operational problems bad combustion or damage to controls The unit should be located at least feet 0 9 1m from any wall or vertical surface to prevent adverse wind conditions from affecting performance Multiple unit outdoor installations require 48 1 22 clearance between each vent cap The outdoor cap must be located 4 feet 1 22 m below and 4 feet 1 22 m 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 30 above grade and above normal snow levels The water heater must be at least 10 feet 3 05 m away from any forced air inlet and at least 3 feet 0 91 outside any overhang Do not install in locat
9. feet 0 9 m above the roof line and when less than 10 feet 3 05 from a parapet wall must be a minimum of 2 feet 0 61 m higher than the parapet wall Vent caps should have a minimum clearance of 4 feet 1 2 m horizontally from and in no case above or below unless a 4 feet 1 2 horizontal distance is maintained electric meters gas meters regulators and relief equipment Maintain a distance of at least 3 feet 0 9 m above any forced air inlet within 10 feet 3 05 m and a distance of at least 4 feet 1 2 m below 4 feet 1 2 m horizontally from or 1 foot 30 cm above any door window or gravity air inlet Do not terminate the vent in a window well stairwell alcove courtyard or other recessed area The vent can not terminate below grade The bottom of the vent terminal shall be located at least 12 inches 30 cm above grade and clear of snow ice leaves or other debris The distance of the vent terminal from adjacent public walkways adjacent buildings windows and building openings Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 7 Lochinvar 46 NOTE A vent system should never be sized based only on the vent connection diameter of the appliance For proper vent design and sizing please consult the National Fuel Gas Code ANSI 2223 1 must be consistent with the National Fuel Gas Code 2223 1 or in Canada the latest edition of CGA Standard B149 Installation Code for Ga
10. GNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 3 Lochinvar RIGHT SIDE INLET GAS FLUE PRODUCTS VENT CONNECTION OPERATOR ON OFF SWITCH TERMINAL STRIP HOT WATER 55 OUTLET gt 120V ELECTRICAL CONNECTION COLD WATER Ss RELIEF VALVE INLET TAPPING gt RAIN BURNER INSPE LEFT SIDE CW495 745 RIGHT SIDE FLUE PRODUCTS VENT OPERATOR GAS ON OFF SWITCH CONNECTION E TERMINAL STRIP HOT WATER OUTLET E COLD WATER INLET LEFT SIDE BURNER INSPECTION PORT CW986 2066 FIG 2 WATER HEATER EQUIPMENT AND CONTROL ORIENTATION 4 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 COMBUSTION amp VENTILATION AIR Provisions for combustion and ventilation air must be in accordance with Section 5 3 Air for Combustion and Ventilation of the latest edition of the National Fuel Gas Code ANSI Z223 1 in Canada the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment or applicable provisions of the local building codes The equipment room must be provided with properly sized openings to assure adequate combustion air and proper ventilation when the unit is installed with conventional venting or sidewall venting CAUTION Under no circumstances should the equipment room be under a negative pressure when atmospheric combustion equipment is installed in the room FIG 3 COMBUSTION AIR DIRECT FROM OUTSIDE EN if ai
11. IAGRAM STORAGE TANK FRONT VIEW ie OUTLET COLD WATER INLET TANK INLET lt OUTLET lt INLET VIEW gt HEATER INLET Heater Inlet Outlet Size Heater zz FULLY PORTED BALL VALVE Model OUTLET VIEW MULTI STACK FRAME W WATER HEATERS AND STORAGE TANK Manifold Pipe Size LIT0396 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 High Efficiency Water Heaters Boilers and Pool Heaters Lochinvar Corporation Lebanon TN 615 889 8900 Fax 615 547 1000 www Lochinvar com CW DG 05 Revised CW DG 05 1 07 4 09 Printed in U S A
12. IVERY A number of water heating applications may require delivered water temperature in a system below 140 F Systems such as nursing homes and hospitals would be examples of this type of system A water heating system that will be operated at less than 140 F must use a mixing valve on the outlet side of the storage tank in order 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 fo 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 can be significantly reduced in the water storage vessel by heating the water to a minimum of 1 40 F See Appendix A for piping details WATER VELOCITY CONTROL IMPORTANT To ensure proper velocity through the heat exchanger it is necessary to regulate the temperature rise across the heat exchanger from inlet to outlet This must be done on initial installation and periodically rechecked With the correct temperature rise across the heat exchanger See TABLE F you may be assured of the proper velocity in the tubes and long life and economical operation from the water heater TABLE F REQUIRED TEMPERATURE RISE MODEL NUMBER TEMPERATURE RISE F CW 495 CW 645 CW 745 CW 986 CW 1256 CW 1436
13. a high efficiency appliance may not be able to sufficiently heat the masonry structure of the chimney to generate proper draft This will result in Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 condensing of flue products damage of the masonry flue tile insufficient draft and possible spillage of flue products into an occupied living space Carefully inspect all chimney systems during the project design phase If there is any doubt about the sizing or condition of a masonry chimney it is prudent to reline the chimney with a properly sized and approved chimney liner system Metallic liner systems Type B doublewall or flexible or rigid metallic liners are recommended Consult with local code officials to determine code requirements or the advisability of using or relining a masonry chimney OUTDOOR INSTALLATION FIG 9 OUTDOOR VENTING Units are self venting and can be used outdoors when installed with the optional Outdoor Cap This cap mounts directly to the top of the water heater and covers the flue outlet and combustion air inlet openings on the jacket No additional vent piping is required Maintain a minimum clearance of 3 76 mm to combustible surfaces and a minimum of 3 76 mm clearance to the air inlet f NOTE Common venting systems may be too large when an existing unit is removed Be careful to resize any common venting system when new appliances are installed or
14. aintain proper water velocity in the heat exchanger 6 NOTE If a pressure reducing valve or check valve is in the system a properly sized expansion tank may be required Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 13 Lochinvar NOTE Incorrect piping of the cold water supply to the system will result in condensate formation on the heat exchanger and operational problems Higher water temperatures reduce condensate formation Refer to drawings in Appendix A 6 NOTE When the unit is installed in Canada it must conform to the CAE C22 1 Canadian Electrical Code Part 1 and or local Electrical Codes Relief Valve This water heater is supplied with temperature and pressure relief valve s sized in accordance with ASME Boiler and Pressure Vessel Code Section IV Heating Boilers TABLE H COMMON WATER MANIFOLD SIZE FOR MULTIPLE WATER HEATER INSTALLATION Pipe sizing chart provides minimum pipe size for common manifold piping to ensure adequate flow NUMBER OF COMMON MANIFOLD SIZE UNITS Min CW 495 thru 745 1 6 CW 986 thru 2066 1 ELECTRICAL REQUIREMENTS North America The appliance is wired for 120 volts EA All wiring between the unit and field installed devices shall be made of type T wire 63 F 35 C rise The pump must be wired to run continuously when unit is firing it is recommended that the water heater and pump b
15. aximum Total Dissolved Solids 350 PPM Range of Acceptable pH 7 2 to 7 8 Standard production Lochinvar water heaters are designed to operate free of impurity build up in the heat exchanger when properly installed and operated under the specitied water quality conditions For installation in areas outside these parameters please consult the factory Water Flow Switch Due to the low water content 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 CW495 thru CW2066 The flow switch is installed in the outlet piping from the water heater and wired in series with the ignition system safety controls In most localities a flow switch is acceptable as a low water cutoff device on water heaters requiring forced circulation It is prudent to verify acceptance with the local code official If the local water quality levels are slightly higher than recommended it may be possible to use a copper nickel heat exchanger With copper nickel being a harder alloy flow rates can be safely increased to keep the greater water hardness and TDS in suspension The flow rate can be increased up to 25 faster than the flow rates listed above NOTE A larger pump must be utilized in situations when the distance between the water and tank exceed those specified 6 NOTE Care should be taken to measure temperature rise and m
16. de with listed Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 Category double wall vent or equivalent connectors and sized according to vent sizing tables FAN column in the latest edition of the National Fuel Gas Code The Category vent and accessories such as tirestop spacers thimbles caps etc must be installed in accordance with the vent manufacturer s listing The vent connector and firestop must provide correct spacing to combustible surfaces and seal to the vent connector on the upper and lower sides of each floor or ceiling through which the vent connector passes Any improper operation of the common venting system in an existing building should be corrected when new equipment is installed so the installation conforms to the latest edition of the National Fuel Gas Code ANSI 2223 1 When resizing any portion of the common venting system it should be resized to approach the minimum size as determined using the appropriate tables in the National Fuel Gas Code The weight of the venting system must not rest on the water heater The venting system must be adequately supported in compliance with local codes and other applicable codes Vent Terminations The vent terminal should be vertical and exhaust outside the building at least 2 feet 0 6 above the highest point of the roof when within a 10 foot 3 05 m radius Additionally vertical terminations must be a minimum of 3
17. e barometric dampers to regulate draft at each unit Again the negative draft must be within the range of 0 02 to 0 08 inches of negative water column to ensure proper operation 8 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 FIG 8 MULTIPLE UNIT BAROMETRIC DAMPER INSTALLATION For this type of installation it is best to use a draft control for each water heater located on the riser between the vent outlet and the breeching Location A When this riser is too short to permit the installation of a draft control locate a separate control for each water heater on the main breeching as illustrated in Location B If because of general crowding or other reasons neither of these locations are possible use a single large control in the breeching between the water heater nearest the chimney and the chimney as shown in Location C All draft readings are made while unit is in stable operation approximately 5 minutes running time Masonry Chimney A masonry chimney must be properly sized for the installation of a high efficiency gas tired appliance Exterior masonry chimneys with one or more sides exposed to cold outdoor temperatures are more likely to have venting problems The temperature of the flue products from
18. e wired on separate circuits with properly sized breakers TABLE 1 AMP DRAW DATA MODEL FAN S CONTROLS PUMP a AMPS w P NUMBER UMP CW 495 745 3 4 13 8 CW 986 1256 3 4 15 4 CW 1436 2066 3 8 15 8 14 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 WATER HEATER PIPING DIAGRAMS APPENDIX A SINGLE HEATER SINGLE TANK PIPING DIAGRAM BUILDING HOT WATER SUPPLY f lt gt COLD WATER SUPPLY S i LOCHINVAR WATER HEATER Ge d H CU 4 RELIEF VALVE pe LOCK TEMP STORAGE TANK N DRAIN BUILDING RETURN LIT0133 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 LEGEND FULL PORT SYSTEM SYSTEM TEE ELBOW UNION EXPANSION CHECK THERMOMETER BALL VALVE PUMP RELIEF VALVE TANK VALVE Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 PIPING DIAGRAM SINGLE HEATER TWO TANK BUILDING HOT WATER SUPPLY RELIEF VALVE COLD WATER LOCHINVAR WATER SUPPLY HEATER A LOCK TEMP OUTLET 2 CUD STORAGE TANK a DRAIN CL BUILDING NG RETURN 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
19. ed a nM an optional vent cap Instructions for non combustible floor Maintain required ph included i placement of the vent cap are included in clearances from combustible surfaces For installation on a combustible Outdoor models must not be installed floor only when installed on directly on the ground The outdoor unit special base Units installed over a must be installed on a concrete brick combustible floor must use the Special block or other non combustible pad Combustible Floor Base The unit must be centered on the base as shown in FIG 1 TABLE A CLEARANCES FROM COMBUSTIBLE CONSTRUCTION CLEARANCES CW495 2066 e Provide base of hollow clay tile or Right Side 3 H yh Rear 3 concrete blocks from 8 to 12 thick EAE and extending 24 beyond the sides 24 for Service Front ALCOVE 30 for Service e The blocks must be placed in line so that ue Didi the holes line up horizontally to provide a clear passage through the blocks Consult local codes and or vent material manufacturer SPECIAL LOCATION OUTDOOR USE Outdoor models have additional location and clearance requirements These requirements must be adhered to caretully since wind rain snow and cold cannot be controlled in outdoor applications See FIG 1 495 2066 REQUIREMENTS FOR Outdoor Installation on page 9 INSTALLATION OVER COMBUSTIBLE FLOOR Lochinvar DESI
20. gle Heater Single Tank Al Single Heater Two Tanks A2 Two Temperature Installation Single Heater Single Tank A3 Two Heaters Single Tank A4 Two Heaters Two Tanks A5 Multi Stack Frame Two Heaters Single Tank A6 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 1 Lochinvar In designing a water heater system pay special attention to O Water Velocity See page 12 for Required Degree Rise chart O Factory Supplied Pump Capacity See page 12 for Pump Operation Manifold Pipe Size When using more than one heater See page 14 for Common Water Manifold Size for Multiple Water Heater Installation Table O Storage Tank Circulating Tappings See page 14 for Manifold Pipe Size Placement of Cold Water Inlet and Building Return See Appendix A for Water Heater Piping Diagrams Water Hardness See page 13 for Water Treatment Information CODES The equipment shall be installed in accordance with those installation regulations in effect in the local area where the installation is to be made These shall be carefully followed in all cases Authorities having jurisdiction shall be consulted before installations are made In the absence of such requirements the installation shall conform to the latest edition of the National Fuel Gas Code ANSI 2223 1 Where required by the authority having jurisdiction t
21. he installation must conform to American Society of Mechanical Engineers Safety Code for Controls and Safety Devices for Automatically Fired Boilers ASME CSD 1 Where required by the authority having jurisdiction the installation must comply with the Canadian 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 air flow Under no circumstances is the manufacturer to be held responsible for water damage in connection with this unit or any of its components Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 EN The indoor units must be installed so that This procedure should also be the ignition system components are followed if electrical conduit or protected from water dripping spraying radiant heat distribution piping rain etc during appliance operation and runs through the floor and service circulator replacement control beneath the appliance replacement e Ensure that combustible floor base meets local fire code requirements EM The appliance must be installed on a level non combustible floor Outdoor models require the installation of Concrete over wood is not consider
22. ions where rain from building runoff drains will spill onto the water heater Lochinvar must furnish an outdoor vent kit in accordance with CSA international requirements Each kit includes the flue outlet combustion air inlet assembly gasket and pump cover TABLE C OUTDOOR VENT KIT PART NUMBERS MODEL NUMBER PART NUMBER CW 495 0DK3023 CW 645 ODK3024 CW 745 ODK3024 CW 986 ODK3046 0DK3047 ODK3047 ODK3048 ODK3048 CW 1256 CW 1436 CW 1796 CW 2066 Freeze Protection Outdoor Installation A snow screen should be installed to prevent snow and ice accumulation around the appliance or its venting system If for any reason the unit is to be shut off a Shut off water supply b Drain unit completely c Drain pump and piping If freeze protection is not provided for the system a low ambient temperature alarm or automatic drain system is recommended GAS SUPPLY The gas pressure regulator supplied is for low pressure service If upstream pressure exceeds 6 oz 10 5 water column an intermediate gas pressure regulator of the lock up type must be installed The gas line should be a separate line direct from meter unless the existing gas line is of sufficient capacity Verity pipe size with your gas supplier A trap drip leg should be provided in the inlet gas connection to the water heater Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 E A ma
23. nual main gas shutoff valve is provided outside the jacket upstream of the main gas valve ER In Canada derated 10 from 2 000 4 500 ft over 4 500 ft derate must be in accordance with local authorities Consult factory for installations at higher elevations High Altitude Applications Atmospheric pressure decreases as the height above sea level increases At any altitude above sea level a cubic foot will contain less gas than a cubic foot at sea level Thus the heating value of a cubic foot of fuel gas will decrease as height above sea level increases Specific gravity of a gas with respect to sea level also decreases with altitude These changes in heating value and specific gravity tend to offset each other However as elevation above sea level is increased there is less oxygen per cubic foot of air Therefore heat input rate should be reduced in an appliance above 2000 feet Ratings should be reduced at the rate of 4 percent for each 1000 feet above sea level TABLE E INLET GAS PRESSURE MODELS NAT GAS LP GAS CW 495 745 Minimum Allowable 4 Maximum Allowable 10 5 CW 986 2066 Minimum Allowable Maximum Allowable WATER CONNECTIONS Inlet and Outlet Water Connections For ease of service install unions on inlet and outlet of the water heater The connection on the unit marked Inlet should be used for return water from the storage tank The connection on the header marked
24. r is taken directly from outside the building with no duct provide two permanent openings A Combustion air opening with a minimum free area of one square inch per 4000 Btu input 5 5 cm per kW Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 This opening must be located within 12 30 cm of the bottom of the enclosure B Ventilation air opening with a minimum free area of one square inch per 4000 Btu input 5 5 cm per kW This opening must be located within 12 30 of the top of the enclosure FIG 4 COMBUSTION AIR THROUGH DUCTWORK if combustion and ventilation air is taken from the outdoors using a duct to deliver the air to the mechanical room each of the two openings should be sized based on a minimum free area of one square inch per 2000 Btu input 11 cm per kW FIG 5 COMBUSTION AIR FROM AN INTERIOR SPACE space each of the two openings specified above should have a net free area of one square inch for each 1000 If air is taken from another interior EXAMPLE OF SIZING FOR COMBUSTION amp VENTILATION AIR OPENINGS WATER HEATER WITH 2 065 000 Btu hr INPUT When combustion and ventilated air is taken from directly outside the building FIG 4 divide the total BTU s by 4 000 This yields 516 25 sq in of Free Area without restriction 2 065 000 4000 516 25 sq in Since the air opening is 50 closed due to screens
25. s Burning Appliances and Equipment VENTING OPTIONS Conventional Venting A conventional venting system utilizes the natural buoyancy of the heated flue products to generate a negative draft This draft forces flue products to rise vertically through a rooftop flue termination The vent connection is made directly to the top of the unit and combustion air supplied from the mechanical room Properly sizing vent material and the use of a barometric damper when required will lead to proper vent operation BAROMETRIC DAMPER ON SINGLE UNIT INSTALLATION CHIMNEY BAROMETRIC DAMPER ON SINGLE UNIT INSTALLATION FIG 7 BAROMETRIC DAMPER INSTALLATION The minimum flue pipe diameters for CopperFin models utilizing negative draft venting are as follows TABLE B FLUE SIZES AND COMBUSTION AIR PIPE SIZES MODEL FLUE SIZE NUMBER CW 495 CW 645 CW 745 CW 986 CW 1256 CW 1436 CW 1796 CW 2066 Size vent material using the FAN category of vent sizing tables in the latest edition of the National Fuel Gas Code FAN applies to fan assisted combustion appliances in Category I Barometric Dampers A barometric damper is required when draft exceeds 0 08 inches of negative water column When installed and adjusted properly a barometric damper will maintain draft between 0 02 and 0 08 inches of negative water column ensuring proper operation Multiple unit installations with combined venting also requir
26. stration 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 LIT0138 E CRM FULLPORT SYSTEM ppp uM e ELBOW UNION EXPANSION CHECK THERMOMETER REDUCING REDUCING BALL VALVE TANK VALVE 4 Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 PIPING DIAGRAM TWO HEATERS TWO TANKS 2 i COLD WATER d SUPPLY p c AZ LOCHINVAR b i WATER HEATERS cg E PX OUTLET BUILDING aH HOT WATER SUPPLY LOCK TEMP STORAGE TANKS Gray shaded area represents common manifold piping onan COMMON WATER MANIFOLD SIZE FOR MULTIPLE WATER HEATER INSTALLATION Pipe sizing chart provides minimum pipe size for common manifold piping to ensure adequate flow NUMBER OF COMMON MANIFOLD SIZE NUMBER OF COMMON MANIFOLD SIZE UNITS Min UNITS Min CW 495 745 CW 986 2066 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 LIT0451 LEGEND FULL PORT SYSTEM SYSTEM TEE ELBOW UNION EXPANSION CHECK THERMOMETER REDUCING REDUCING BALL VALVE PUMP RELIEF VALVE TANK VALVE TEE TEE Lochinvar DESIGNER S GUIDE COPPER FIN WATER HEATER 615 889 8900 A5 PIPING D
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