Оценок - 2, средний балл: 4.5
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Фрагмент инструкции
i. Assure that all system radiators, piping and vents are absolutely leak tight. • When a steam boiler is installed in an existing system, ALL air vents should be replaced at the same time. This assures that the new boiler will not be compromised by existing system leaks. • If the system contains hidden supply or return piping (hidden behind walls, buried in concrete, etc.) pressure test this piping to assure there are no leaks. ii. Repair any leaks in the system. iii. Install accurate water meter on the fresh water supply to the boiler. NOTICE Do not use softened water in steam boilers. Accelerated boiler corrosion will result. Tie in fresh water supply to the boiler upstream of a water softener. 4. OXYGEN CONTAMINATION: a. There are many possible causes of oxygen contamination such as: i. Addition of excessive make-up water as a result of system leaks. ii. Absorption through open tanks and fittings. iii. Oxygen permeable materials in the distribution system. b. In order to insure long product life, oxygen sources should be eliminated. This can be accomplished by taking the following measures: i. Repairing system leaks to eliminate the need for addition of make-up water. ii. Eliminating open tanks from the system. iii. Eliminating and/or repairing fittings which allow oxygen absorption. iv. Use of non-permeable materials in the distribution system. v. Isolating the boiler from the system water by installing a heat exchanger. See Section V, Paragraph B, Step 3 for additional details. CAUTION Oxygen contamination of the boiler water will cause corrosion of iron and steel boiler components, and can lead to boiler failure. New Yorker's Standard Warranty does not cover problems caused by oxygen contamination of boiler water or scale (lime) build-up caused by frequent addition of water. 1 I. CONNECT TANKLESS HEATER PIPING AS SHOWN IN Figure 12. See Table 3 for Tankless Heater Ratings. Figure 12: Schematic Tankless Heater Piping TABLE : TANKLESS HEATER DATA Boiler Model Rating (Gal/Min) Pressure Drop (PSI) Steam Water Steam Water CL3-091 2.25 2.75 2.3 3.9 CL3-105 2.25 3.00 2.3 4.7 CL3-140 2.50 3.25 3.1 5.6 CL4-126 2.50 3.25 3.1 5.6 CL4-175 2.75 3.75 3.9 7.2 CL4-210 3.00 4.00 4.7 8.0 CL5-168 2.75 3.50 3.9 6.4 CL5-245 3.25 4.25 5.6 8.8 CL5-280 3.50 4.75 6.4 9.6 THE FOLLOWING GUIDELINES SHOULD BE FOLLOWED WHEN PIPING THE TANKLESS HEATER: 1. FLOW REGULATION — If flow through the heater is greater than its rating, the supply of adequate hot water may not be able to keep up with the demand. For this reason a flow regulator matching the heater rating should be installed in the cold water line to the heater. The flow regulator should preferably be located below the inlet to the heater and a minimum of 3’ away from the inlet so that the regulator is not subjected to excess temperatures that may occur during “off” periods when it is possible for heat to be conducted back through the supply line. The flow regulator also limits the flow of supply water regardless of inlet pressure variations in the range of 20 to 125 psi. 2. TEMPERING OF HOT WATER — Installation of an automatic mixing valve will lengthen the delivery of the available hot water by mixing some cold water with the hot. This prevents excessive and possibly scalding hot water at the fixtures. In 1 addition, savings of hot water will be achieved since the user will not waste as much hot water while seeking water temperature to his liking. Higher temperature hot water required by dishwashers and automatic washers is possible by piping the hot water from the heater prior to entering the mixing valve. The mixing valve should be “trapped” by installing it below the cold water inlet to heater to prevent lime formation in the valve. WARNING Install automatic mixing valve at tankless heater outlet to avoid risk of burns or scalding due to excessively hot water at fixtures. Adjust and maintain the mixing valve in accordance with the manufacturer's instructions. 3. FLUSHING OF HEATER — All water contains some sediment which settles on the inside of the coil. Consequently, the heater should be periodically backwashed. This is accomplished by installing hose bibs as illustrated and allowing water at city pressure to run into hose bib A, through the heater, and out hose bib B until the discharge is clear. The tees in which the hose bibs are located should be the same size as heater connections to minimize pressure drop. 4. HARD WATER — A water analysis is necessary to determine the hardness of your potable water. This is applicable to some city water and particularly to well water. An appropriate water softener should be installed based on the analysis and dealer’s recommendation. This is not only beneficial to the tankless heater but to piping and fixtures plus the many other benefits derived from soft water. J. INSTALL SMOKEPIPE — The CL Series boiler should be vented into a fireclay tile-lined masonry chimney or chimney constructed from type L vent or a factory built chimn...
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