Rinnai Sizing Reference Guide for Tankless Rack Systems Utilizing Storage Miscellaneous Information
Contents
1. 2a 8 R 3 How to Select a TRS System Using TRS Performance Chart Recovery GPH First Hour Delivered Required Find value closest to specified recovery GPH or first hour delivered at temperature rise Select corresponding TRS system storage tank and recovery pump size to the left of the table For example If specified First hour delivered is 900 gallons 60 F rise select TRS system corresponding to 896 gallons TRS System TRSO2 or TRW02 Storage tank size 200 gallons Recovery pump size 12 GPM 30 ft head How to Select a TRS System Using TRS Cross Reference Chart Find existing or specified system BTUH and thermal Eff TE to the left of chart match closely to TRS system BTUH and select TRS system with recovery pump accordingly For example If existing or specified system BTUH is 400 000 and thermal Eff gt 93 TRS System TRSO2 or TRW02 Storage tank size as specified or existing Recovery pump size 12 GPM 30 ft head Product Sizing Disclaimers This Sizing Reference Guide and all information contained herein is based on the proper installation and use of 1 a series of Rinnai Tankless Water Heaters which are piped to a storage tank and 2 an adequate and properly sized Recovery Pump that will recover the storage tank i that will circulate water from the Rinnai Tankless Water Heaters into the storage tank thereby allowing the Rinnai Tankless Water Heaters to properly heat the water for the s2. 16 8 1 008 1 218 15 1 07 1 117 800 000 s gt 93 or existing f 1 a 1 a a 414 1 288 1 187 First Hour Delivered Gal useable volume of water that can be drawn in 1 2 1 1646 1 1 484 1 1 358 1 297 one hour and is determined using the 95 95 95 5 WH Max Number of Tank Size TWH BTUH Input TRWO02 TRS02 398 000 TRW03 TRS03 597 000 TRW04 TRS04 796 000 TRW02 TRWO03 TRSO5 Existing Storage Existing or or Specified Systems Tank Specified TE Recovery pump pump that will BTUH Size circulate water from tank to TRS 100 200 300 100 200 300 400 100 200 300 400 500 200 300 400 500 200 300 400 500 300 1 393 000 400 500 r O NO D amp ie 995 000 1 194 000 2 EN 2 E N 1 B ae 652 1 501 difference in F between the TRS 2 i 2 a 1 a ama 722 1 571 Reepeciied set point and the incoming water 2 269 1 945 1 701 1 512 99 7 1 361 1 200 000 ioe gt 93 temperature 2 8 2 2 1 1 a 1 792 1 641 or existing 2 ETE 2 2 2 2 051 Zo 1 862 1 711 2 2 857 2 ake 2 o 974 1 798 As specified s 2 647 2 ee 2 269 2 a 1 985 2 ae 1 764 2 20m 96 5 1 588 1 868 1 400 000 ee gt 93 2 997 F Fee 1 938 os 235 2 n 2 a 227 2 025 3 025 AS 305 2 593 2 28 2 269 2 ea 2 017 2 2 297 30 2 1 815 2 095 1 600 000 ea gt 93 3 375 2 2943 2 2619 2367 2 165 a 127 2 a eel 479 2 252 3 403 683 2 917 197 9 552 2 2 26
3. 9 2 ae 2 042 2 322 1 800 000 me Ponia gt 93 Note or existing an 753 ia 267 2 a 2619 9 2 399 This chart should be used only when the existing or specified system is known 34 0 4 4 061 2 ae 116 MEEN 2801 an 241 2 ee 2 est 37 8 2 269 4 131 3501 3 186 a J Q O gt Bas 1 592 000 400 00 00 1 791 000 400 500 o1 r Ol IS 1 Mi 1 E 1 a 400 1 274 following formula 1 722 1 ae ign 1 344 7 7 1 512 aS 1 296 1 418 1 260 18 9 1 134 1 000 000 ao P ieg gt 93 First Hour Delivered Gal Recovery 1 a a oe oe 1 414 or existing GPH Tank capacity x 0 70 1 862 ee o ee oom 1610 ea Temperature rise temperature 2 822 1 990 000 3 781 aii select TRS model to the left of chart or existing Use existing or specified storage tank 2 189 000 95 4 159 3 119 2 773 2 495 2 200 000 me gt 93 left for recovery GPH performance 4 509 _ Sasi 3469 469 Sie leo Cas To calculate First Hour Delivered add 2 388 000 500 12 95 4 537 3 889 3 403 3 025 2 400 000 isti gt 93 to recovery GPH 500 4 887 4 239 3 753 3375 or existing 7 TA y 7 a Y al Een re a Note Multiple configurations available TRS models are Free Standing units PA Nis K SEAL TRW models are Wall Mount units Reference TRS Manual and Specification E N a ay If common venting is used with the TRS please contact Rinnai for assistance VA io ae a eS
4. a 5 Lain 33 Performance Chart FOR TANKLESS RACK SYSTEMS UTILIZING STORAGE Cross Reference for Existing or DEFINITIONS specified Systems Tank capacity capacity of water in Existing System gallons inside storage tank as stated by manufacturer Recovery Capacity and First Hour Delivered Temperature rise F with Storage Tank Rack System Configurations 60 Temperature Rise 70 Temperature Rise 80 Temperature Rise 90 Temperature Rise 100 Temperature Rise Recovery Pump Size First Hour First Hour First Hour First Hour First Hour Recovery Recovery Recovery Recovery Recovery Recovery Recovery Recovery f Recovery Recovery Recovery Gal Efficiency GPM cpH Delivered GPM GPH sips GPM GPH capable GPM na GPM GPM GPH series during recovery period 71 524 a MEA 7 6 454 594 400 000 As specified gt 93 Recovery flow rate flow rate in or existing gpm at which volume inside tank is e a 664 being recovered 95 se 751 R GPH th rhea ecovery the water heater s 1 134 ial 16 2 972 na 14 2 851 oa 12 6 756 ES 11 3 81 a 600 000 ea a gt 93 ability to replenish hot water as it s i aT 1 a 82 1 061 966 891 or existing i drawn from the tank 1414 2 ie Te eee al Recovery efficiency the ratio of 1 E E 1 m 1 204 1 078 977 energy delivered to the water to the 1 e 1 s 1274 1148 1 047 energy content of the fuel consumed 7 Asepeciied by the water heater 95 1 512 z 122 1 296 1 a 18 9 1 134 1 344
5. ion contained herein does not imply compliance with local building codes It is the responsibility of your design engineer and or contractor to ensure that installation of any system is performed in accordance with all applicable building codes You should always confer with local building officials before installation An adequate and properly sized Recovery Pump is critical to the proper performance and operation of the systems described herein Indeed the systems described herein will only work with an adequate and properly sized Recovery Pump Ensure that all water supply pipes are sized per local plumbing codes Multiple TRS should be installed in parallel using a secondary manifold from the building s cold and hot water supply You should reference the particular section of the TRS installation manual for piping multiple racks The building s circulation pump must be controlled by an aquastat timer or both The Recovery Pump must be controlled by a submersible aquastat placed inside the tank A minimum 20 F differential temperature setting is required for the aquastat For example if the Rinnai set point is 140 F then the aquastat activation set point should be 120 F Always refer to the storage tank and aquastat manufacturer installation instructions for additional information Only use pumps of brass bronze or stainless steel construction Do not use pumps of iron construction lf the intended installation of a system is loca
6. ted in a hard water area a softener or similar water treatment system must be used Sizing Reference Guide FOR TRADE PROFESSIONALS R PRWH E 25 A tradition of For nearly 100 years we at Rinnai have been fiercely committed to delivering nothing less than our absolute best at every touch point To us that means more than manufacturing products its about inspiring confidence in our customers Confidence in the comfort our solutions give And in the support we provide Rinnai Learn more about our high performance Tankless Water Heaters Boilers and Direct Vent Wall Furnaces at www rinnai us Rinnai America Corporation 103 International Drive Peachtree City GA 30269 Toll Free 1 800 621 9419 Phone 678 829 1700 www rinnai us 2013 Rinnai America Corporation Rinnai is continually updating and improving products therefore specifications are subject to change without prior notice Local state provincial federal and national fuel gas codes must be adhered to prior to and upon installation 08 2013
7. torage tank This Sizing Reference Guide is intended to be used as a guide only and not as a replacement for a professionally engineered project The guide should only be referenced after your design criteria has been selected and approved by your design engineer and or contractor The guide is intended to assist the user in determining the model type and number of products that can be utilized for a particular application The information set forth herein is for general assistance and information only and should not be the sole factor in making any decision about a specific system or product For additional information please refer to the Rinnai Hot Water System Design Manual or contact the Application Engineering Department at Rinnai America Corporation The information set forth herein regarding performance of a TRS Storage tank system does not and is not intended to imply warrant or represent that a specific system is adequate or appropriate for your given application The sizing information set forth herein does not describe a complete system Anyone using this Sizing Reference Guide is ultimately responsible for determining the actual hot water demand for the specific application and for selecting appropriate Rinnai products for the given application Your design engineer and or contractor must determine the necessary components for and configuration of the particular system being installed All such design conditions must be met The informat
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