Water-To-Water System Design Guide
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GEOTHERMAL HEATING AND COOLING SYSTEMS 7300 SW 44th. STREET OKLAHOMA CITY • OK • 73179 (405) - 745-6000 • (800) - 299 - 9747 WWW.CLIMATEMASTER.COM WATER-TO-WATER SYSTEM DESIGN GUIDE *RP812* TRANQUILITY & GENESIS © ClimateMaster, Inc. 2007 REV.: 05 Nov, 2007D SMART. RESPONSIBLE. COMFORTABLE. WATER-TO-WATER SYSTEMS RP812 Water-to-Water System Design Guide ClimateMaster Geothermal Heat Pump Systems Table of Contents Revision Log Water-to-Water System Design Guide Unit Information Date Page # Description Part 1: System Overview Tranquility Water-to-Water (THW) Series 05 Nov, 2007 74 - 77 Corrected Source WPD & Load HE 12 Oct, 2007 All First Published Why Hydronics .............................................................................................1 Features ..........................................................................................................72 Model Key .....................................................................................................74 Part II: Load Side Design Unit Performance .....................................................................................76 Heat Gain / Loss Calculations ..............................................................6 Physical Data ...............................................................................................80 System Design & Selection .................................................................10 Unit Dimensions .......................................................................................81 Piping Design ...............................................................................................22 Electrical Data .............................................................................................82 Source & Load Pump Sizing ...............................................................24 Wiring Diagrams .......................................................................................84 Distribution Design ..................................................................................24 Engineering Specifi cations ....................................................................96 Radiant Floor Heating ............................................................................26 Baseboard Heating ...................................................................................27 Genesis Water-to-Water (GSW) Series Cast Iron Heating .....................................................................................28 Features .......................................................................................................100 Fan Coils ........................................................................................................29 Model Key ..................................................................................................102 Snow Melt Applications ........................................................................30 Unit Performance ..................................................................................104 Physical Data ............................................................................................117 Part III: Source Side Design Unit Dimensions ....................................................................................118 System Selection .......................................................................................31 Electrical Data ..........................................................................................120 Open Loop Design ..................................................................................38 Wiring Diagrams ....................................................................................121 Closed Loop Design ...............................................................................40 Engineering Specifi cations .................................................................129 Closed Loop Instillation Guidelines ................................................42 Part IV: Controls THW Controls ..........................................................................................56 Wiring Diagrams .......................................................................................59 Revision Log...............................................................Inside Back Cover ClimateMaster works continually to improve its products. As a result, the design and specifi cations of each product at the time for order may be changed without notice and may not be as described herein. Please contact ClimateMaster’s Customer Service Department at 1-405-745-6000 for specifi c information on the current design and spec i fi ca tions, and placing orders. Statements and other infor ma tion contained herein are not express warranties and do not form the basis of any bargain between the parties, but are merely ClimateMaster’s opinion or commen dation of its products. ClimateMaster: Smart. Responsible. Comfortable. Water-to-Water System Design Guide ClimateMaster Geothermal Heat Pump Systems Part I: System Overview WHY HYDRONICS? and require a fan to circulate air through ductwork. Water-to-water heat pumps heat water, allowing the design of a hydronic heating According to Webster’s Dictionary, hydronic heating is “a system of system with the benefi ts of more effi cient energy distribution, heating or cooling that involves the transfer of heat by a circulating lower operating costs and better comfort. fl uid (as water or vapor) in a closed system of pipes.” Because water is the most effi cient way to move thermal energy, a hydronic Fossil fuel furnaces and boilers are always less than 100% effi cient. system requires much less transport energy in the process and Even the best systems are 95-96% effi cient. Geothermal heat takes up far less space. For example, a 1” [25mm] diameter pipe pumps typically deliver 4 to 6 Watts of heat for every Watt can carry as much heat as a 10” x 19” [254 x 483 mm] rectangular of energy consumed to run the compressor and ground loop duct carrying hot air at 130°F [54°C]. In addition, the mass of pump(s). In other words, for each Watt of energy used, 3 to 5 the ground loop [geothermal piping] and/or radiant fl oor piping Watts of free energy from the ground is added to provide 4 to provides thermal storage, allowing the system to virtually ignore 6 Watts of energy to heat the space. The use of a high effi ciency large changes in outdoor temperatures. There is no storage benefi t water-to-water heat pump and a hydronic heating system is an in most HVAC systems. unbeatable combination. Figure 1-1: Thermal Energy Comparison Water-to-Water Heat Pumps ClimateMaster water-to-water heat pumps offer high effi ciencies, advanced features, extremely quiet operation and application fl exibility. As ClimateMaster’s most adaptable products, water-to-water heat pumps may be used for radiant fl oor heating, snow/ice melt, domestic hot water heating, and many other hydronic heating applications. Water Pipe ClimateMaster’s exclusive double isolation compressor mounting system provides the quietest water-to-water units on the market. Compressors are mounted on rubber-grommets or vibration Air Duct isolation springs to a heavy gauge mounting plate, which is then isolated from the cabinet base with rubber grommets for Hydronics systems, especially systems using radiant fl oor heating, maximized vibration/sound attenuation. A compressor discharge provide lower operating costs than forced air systems. More Watts muffl er and additional sound attenuation materials further enhance are used to circulate air through ductwork than to circulate water the quiet operation (THW models). through piping. For example, a typical 80% effi cient natural gas residential furnace with an output capacity of 80,000 Btuh [23.4 ClimateMaster water-to-water heat pumps are available as heating kW] uses an 850 Watt fan motor. For every Watt used to power only (THW series) or with reversible operation for heating and the fan, 94 Btuh [28 Watts] of heat is delivered via the forced air cooling (TMW and GSW series). Figure 1-2 shows the simple ductwork. If a boiler or heat pump is used to generate heat, but refrigerant circuit of the THW series. With only four major the heat is delivered through a radiant fl oor system, the pumping components, the refrigerant circuit is easy to understand and power would typically be around 300-400 Watts, or 40% to 50% troubleshoot if necessary. of the air delivery system Watts, resulting in around 230 Btuh [67 Watts] of heat per Watt of pump power. The THW series includes a special high temperature scroll compressor coupled with heat exchangers designed specifi cally Radiant fl oor systems provide heat at occupant level. Hot air rises for water heating, which provides unmatched effi ciencies and to the ceiling (forced air systems), but heat always moves to cold performance. The evaporator is a coaxial (tube-in-tube) heat (radiant system). Therefore, a warm fl oor will heat objects in the exchanger that is capable of operation over a wide range of space, not the air directly, resulting in a space that feels warmer at temperatures, and is more rugged than other types of evaporators, lower thermostat settings. Occupants will feel more comfortable, especially for open loop (well water) systems. The condenser and when the thermostat setting is lowered, the heat loss uses a close approach temperature brazed plate heat exchanger decreases, resulting in better comfort at lower operating costs. that is designed for high temperature operation. This combination of coaxial/brazed plate