Instruction/ maintenance manual of the product CW 745 Lochinvar
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DE SI GNE R ’ S GUI DE CO P P E R -F I N ® WA T E R H E A T E R 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.
Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 1 Codes . . . . . . . . . . . . . . . . . . . . . . . . .2 Combustion & V entilation Air . . . . . . . . .5 Contaminants . . . . . . . . . . . . . . . . . . . .6 Determining T otal “Free Area” .
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.
The indoor units must be installed so that the ignition system components are protected from water (dripping, spraying, rain, etc.) during appliance operation and ser vice (circulator replacement, control replacement, etc.). The appliance must be installed on a level, non-combustible floor .
4 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 L o c hinv ar (FIG. 2) W A TER HEA TER EQUIPMENT AND CONTROL ORIENT A TION.
Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 5 COMBUSTION & VENTILA TION AIR Provisions for combustion and ventilation air must be in accordance with Section 5.3, Air for Combustion and V entilation, of the latest edition of the National Fuel Gas Code, ANSI Z223.
6 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 Btu (22 cm 2 per kW) of input, but not less than 100 square inches (645 cm 2 ).
Categor y I double wall vent (or equivalent) connectors and sized according to vent sizing tables (F AN column) in the latest edition of the National Fuel Gas Code . The Categor y I vent and accessories, such as firestop spacers, thimbles, caps, etc., must be installed in accordance with the vent manufacturer’ s listing.
8 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 must be consistent with the National Fuel Gas Code Z223.1 or in Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment.
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”.
10 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 An outdoor unit should not be located so that high winds can deflect off of adjacent walls, buildings or shrubber y causing recirculation. Recirculation of flue products may cause operational problems, bad combustion or damage to controls.
A manual main gas shutoff valve is provided outside the jacket, upstream of the main gas valve. In Canada, derated 1 0% f r o m 2 , 000 - 4,500 ft., o v e r 4 , 500 ft. derate must be in accordance with local authorities. Consult factor y for installations at higher elevations.
LOW W A TER TEMPERA TURE DELIVER Y 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.
Due to pump capacity the following specifications cannot be exceeded when using the standard pump: • Not more than 45 feet of straight pipe. • For ever y elbow and tee in excess of those shown above, DEDUCT 5 FEET from maximum allowable straight pipe in heater-to-tank circulating loop.
14 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 Relief V alve This water heater is supplied with temperature and pressure relief valve(s) sized in accordance with ASME Boiler and Pressure V essel Code, Section IV “Heating Boilers.
Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 A1 W A TER HEA TER PIPING DIA GRAMS APPENDIX A PIPING DIAGRAM SINGLE HEA TER - SINGLE T ANK BUILDING HOT W A TER SUPPL Y R.
A2 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 PIPING DIAGRAM SINGLE HEA TER - TWO T ANK FULL PORT BALL V AL VE SYSTEM PUMP SYSTEM RELIEF V AL VE TEE ELBOW UNION EXP .
FULL PORT BALL V AL VE SYSTEM PUMP SYSTEM RELIEF V AL VE TEE ELBOW UNION EXP ANSION TA N K CHECK VA LV E THERMOMETER LEGEND PIPING DIAGRAM TWO TEMPERA TURE INST ALLA TION - SINGLE HEA TER-SINGLE T ANK.
A4 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 PIPING DIAGRAM TWO HEA TERS-SINGLE T ANK FULL PORT BALL V AL VE SYSTEM PUMP SYSTEM RELIEF V AL VE TEE ELBOW UNION EXP A.
Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 6 1 5-889-8900 A5 FULL PORT BALL V AL VE SYSTEM PUMP SYSTEM RELIEF V AL VE TEE ELBOW UNION EXPANSION TA N K CHECK VA LV E REDUCING TEE .
A6 Lochinvar D ESI GNER ’ S GUID E COPPE R - FIN W A TER HE A TER 615-889-8900 PIPING DIAGRAM MUL TI-ST ACK FRAME W/ W A TER HEA TERS AND STORAGE T ANK LIT0396 Heater Heater Inlet/ Manifold Model Ou.
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Loch invar 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.
An important point after buying a device Lochinvar CW 745 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lochinvar CW 745 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lochinvar CW 745 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lochinvar CW 745 you will learn all the available features of the product, as well as information on its operation. The information that you get Lochinvar CW 745 will certainly help you make a decision on the purchase.
If you already are a holder of Lochinvar CW 745, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lochinvar CW 745.
However, one of the most important roles played by the user manual is to help in solving problems with Lochinvar CW 745. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lochinvar CW 745 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
