Amtrol Therm-X-Trol manual

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Table of contents for the manual

  • Page 1

    Refer ence Guide THERMAL EXP ANSION AND CROSS - CONNECTION CONTROL SOLUTIONS As Seen On[...]

  • Page 2

    2 3 In a 40-gallon water heater , for example, water being heated to recover after usage will expand to about 40.60 gallons when the desired temperatur e is reached. It expands! Reacting to physical law , water expands in volume as its temperature rises. In the "Good Old" days Before the advent of cross-connection contr ol, expanded water[...]

  • Page 3

    4 5 W ater is not compressible Since water completely fills the water heater and system piping before recovery starts, and since it can't be compressed, the expanded volume, even though small, has no place to go. As a result, the expanding water creates a rapid and dangerous pr essure increase in the water heater and system piping, much like t[...]

  • Page 4

    6 7 Even though the relief valve operates during each recovery period, high internal pressur es occurring over and over again can accelerate tank leakage and short- en water -heater life, no matter how it is fir ed. Controlled Pr essur e Rise During Thermal Expansion The best solution to thermal expansion is to control the pressur e it generates wi[...]

  • Page 5

    8 9 AIR CUSHION AIR CUSHION AIR CUSHION EXP ANDED W A TER This is easily accom- plished by adding an expansion tank with a sealed-in, compressible air cushion, which will compress as thermal expansion occurs, pro- viding the place for the expanded volume of water to go during recovery . By sizing the air cushion according to Boyle's Law , we c[...]

  • Page 6

    10 11 Sizing charts based on: • Prechar ge matched to incoming supply pressur e prior to installation • Incoming water temperature 40°F • 150psi T & P safety relief valve AMTROL ’ s Therm-X-T rol ® br ochure MC#4090 contains precise sizing guidelines for sytems not covered in the above charts. The thermal-expansion tank for domestic w[...]

  • Page 7

    MC# 8550 PN: 9015-612 (06/07) ® Corporate Headquarters 1400 Division Road W est Warwick, RI 02893 T elephone: 401-884-6300 Fax: 401-884-5276 AMTROL Canada, Ltd. 275 Shoemaker Street Kitchener , Ontario N2E 3B3 T elephone: 519-478-1138 Fax: 519-748-1138 www .amtrol.com 12[...]