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Rheem Direct Vent Gas Tankless Water Heater manual

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Table of contents for the manual

  • Page 1

    AP14044 (06/06) FOR Y OUR SAFETY! — Do not store or use gasoline or other flammable vapors or liquids or other combustible materials in the vicinity of this or any other appliance. T o do so may result in an explosion or f ire. — WHA T TO DO IF Y OU SMELL GAS ● Do not try to light any appliance. ● Do not touch any electrical switch; do not [...]

  • Page 2

    Safety Inf ormation Safety Precautions . . . . . . . 3–6 LP Gas Models . . . . . . . . . . . 5 Installation Instructions Location, Outdoor . . . . . . . . . . 7 Location, Indoor . . . . . . . . . 8, 9 V enting . . . . . . . . . . . . . . 10-15 W ater Connections . . . . . 16-18 Gas Supply . . . . . . . . . . . . . . 19 High Altitude . . . . . . .[...]

  • Page 3

    Be sure to r ead and understand the entire Use and Car e Manual befor e attempting to install or operate this water heater . It may sav e you time and money . Pay particular attention to the Safety Instructions. F ailure to f ollow these warnings could r esult in serious bodily injury or death. Should you ha ve pr oblems understanding the instructi[...]

  • Page 4

    Time/T emperature Relationship in Scalds W ater T emperature T ime T o Produce a Serious Burn 120°F (49°C) More than 5 minutes 125°F (52°C) 1 1 / 2 to 2 minutes 130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 1 1 / 2 seconds 155°F (68°C)[...]

  • Page 5

    5 Both LP and natural gas ha ve an odorant added to aid in detecting a gas leak. Some people may not physically be able to smell or r ecognize this odorant. If you ar e unsure or unfamiliar with the smell of LP or natural gas, ask the gas supplier . Other conditions, such as “odorant fade”, which causes the odorant to diminish in intensity , ca[...]

  • Page 6

    6 Ha ve the installer show y ou the location of the gas shut-off valve and how to shut it off if necessary . T urn off the manual shut-off valve if the water heater has been subjected to overheating, f ire, flood, ph ysical damage or if the gas supply fails to shut off. ● Read this manual entirely bef ore installing or operating the water heater [...]

  • Page 7

    1” (2.5 cm) min 1” (2.5 cm) min 1” (2.5 cm) min Coaxial V ent Pipe & Air Intake W ARNING: Follow vent manufacturer’ s instruction while installing vent. If requir ed, provide additional clearances from vent to comb ustibles per vent manufactur er’s instruction. ! 7 Installing the water heater : This water heater must be installed in a[...]

  • Page 8

    Manual Appliance Gas Shut-off V alve W ood Screw x 5pcs. W asher x 4 pcs. Use & Care Manual Tankless Unit FOR YOUR SAFETY! — Do not store or use gasoline or other flammable vapors or liquids or other combustible materials in the vicinity of this or any otherappliance. To do so may result in an explosion orfire. — WHATTO DO IF YOU SMELLGAS ?[...]

  • Page 9

    9 The water heater must be installed with a 3” or 5” diameter UL appro ved Category III Coaxial Stainless Steel appliance coaxial vent pipe and an appr opriate adapter . V enting The installation of venting must comply with national codes, local codes and the vent manufacturer’ s instructions. The water heater must be vented to the outdoors a[...]

  • Page 10

    Installing the water heater: V enting Through Closed Spaces If the coaxial vent piping passes through a closed space, a minimum clearance of 1” (2.5 cm) when installed horizontally or 6” (15 cm) when installed vertically should be maintained between the coaxial v ent pipe and combustibles and noncomb ustibles. Be sure to follow local codes and [...]

  • Page 11

    D V V E F IX ED C L OS ED O P E R ABL E O P E RA B LE FIXE D CLO S ED v v B L F C B v v v X B B B A J B I H X v M K v G A The following information should be used for determining the proper location of the v ent terminal for direct vent tankless water heaters. V V V E E N N T T T T E E R R M M I I N N A A L L X A A I I R R S S U U P P P P L L Y Y I[...]

  • Page 12

    Installing the water heater: Additional Considerations Do NO T install vent terminal under an y patio or deck. T o help prev ent moisture from freezing on walls and under eav es, do not locate vent terminal on the side of a b uilding with prev ailing winter winds. T o help prev ent water lines from freezing, do not locate vent terminal on the side [...]

  • Page 13

    Example A: T ypical Horizontal T ermination w/ 1/4” per f oot DO WNW ARD Slope 13 Installing the water heater:[...]

  • Page 14

    Installing the water heater: V ertical V ent Installation A fire stop plate should be installed at e very penetration of a floor or ceiling if the vent is not running in a fire-rated shaft. Maintain the recommended air space clearance to combustible materials and b uilding insulation. Once the vent terminal location has been determined, make a hole[...]

  • Page 15

    15 W ater Supply Connections IMPOR T ANT : Do not apply heat to the HO T or COLD water connections. If sweat connections are used, sweat tubing to adapter befor e fitting adapter to the water connections on heater . Any heat applied to the water supply fittings will permanently damage the internal components of the water heater . Mounting the W ate[...]

  • Page 16

    Installing the water heater: W ater Supply Connections, continued Notice: If the water flo w resistance of a shower head is too high, the b urner in the water heater will fail to ignite. K eep the shower head clean from debris that could cause additional pressure drop. Notice: If using mixing valv es on the outlet, choose one that prev ents cold wa[...]

  • Page 17

    Relief V alve A new pressur e relief valv e, complying with the Standard for Relief V alves and A utomatic Gas Shut-Off Devices f or Hot W ater Supply Systems, ANSI Z21.22/ CSA 4.4, must be installed at the hot water outlet connection of the water heater at the time of installation. Local codes shall gover n the installation of relief valv es. For [...]

  • Page 18

    This water heater is certif ied for installations up to 3,280 feet (1000 m) abov e sea lev el. The input rating of this water heater is based on sea le vel operation. At higher elev ations, the actual input rate may be lower than the v alue list- ed on the rating label. NO TICE: Select High Altitude models are a vailable. One model is a vailable f [...]

  • Page 19

    Remote Control Installation One (1) remote control is provided with the water heater . Additional remote controls may be purchased separately . Up to three (3) remote controls can be used with this water heater . The following are considerations for determining the location of the remote control(s): ● ● DO NO T install any remote control outdoo[...]

  • Page 20

    20 Installing the Main Remote Contr ol: W ARNING: Field wiring connections and electrical grounding must comply with local codes, or in the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFP A 70, or in Canada, Canadian Electrical Code, CSA C22.1 Part 1.[...]

  • Page 21

    Electrical Connection PO WER CORD: ● The electric power supply requirement for this water heater is 120 V A C/60HZ, 2 Amps. ● The water heater comes with a three (3) pin power supply cord. Use only a po wer outlet with a ground terminal. ● The installation of an electric leakage breaker is recommended. ● Keep an y excess of the po wer suppl[...]

  • Page 22

    22 Installing the water heater: T ypical Installation of W ater Heater (V enting Required)[...]

  • Page 23

    23 For increased ener gy eff iciency , use pipe insulation. Please install the insulation according to the diagram abov e, making sure to insulate all the way to the top. Do not cov er any drain or pressure relief v alve(s). Do’ s ❑ Do follow all installation instructions cov ered in this manual. ❑ Do check inlet gas pressure to ensure that i[...]

  • Page 24

    Installing the water heater: A. Indoor W ater Heater Location ❑ Close to area of vent termination. ❑ Indoors and protected from freezing temperatures. ❑ Proper clearance from combustible surf aces observed. ❑ Suff icient fresh air supply for proper operation of water heater . ❑ Air supply free of corrosiv e elements and flammable vapors. [...]

  • Page 25

    25 Lighting the water heater: Bef ore operating this water heater , be sure to r ead and follo w the instructions on the label pictured below and all other labels on the water heater , as well as the warnings printed in this manual. F ailure to do so can result in unsafe operation of the water heater , resulting in property damage, personal injury [...]

  • Page 26

    Time/T emperature Relationship in Scalds W ater T emperature T ime T o Produce a Serious Burn 120°F (49°C) More than 5 minutes 125°F (52°C) 1 1 / 2 to 2 minutes 130°F (54°C) About 30 seconds 135°F (57°C) About 10 seconds 140°F (60°C) Less than 5 seconds 145°F (63°C) Less than 3 seconds 150°F (66°C) About 1 1 / 2 seconds 155°F (68°C)[...]

  • Page 27

    27 W ater T emperature Setting… Maximum water temperature occurs while the burner is on. T o determine the water temperature, turn on a hot water faucet and place a thermometer in the water stream. W ater temperature at the faucet may v ary depending on season and length of pipe from the water heater . The factory setting of the remote control te[...]

  • Page 28

    Car e and cleaning of the water heater: Routine Pre ventati ve Maintenance Properly maintained, your water heater will provide years of dependable trouble- free service. It is recommended that a periodic inspection of the burner , relief valve, air intake f ilter , water filter and v enting system should be made by service personnel qualified in ga[...]

  • Page 29

    CA UTION: Do not operate without the condensate trap connected to the vent and r outed to the proper drain. ! 29 Condensate T rap Inspection On a regular basis, inspect the condensate trap to ensure there is enough water in the trap and the condensate is draining properly . Ensure that condensate is disposed of per local codes and regulations. If t[...]

  • Page 30

    Draining the W ater Heater W ARNING: Failure to drain the water heater can cause serious damage to the water heater as well as personal injury . Below are instructions for draining w ater out of the water heater . T urn of f the switch on the remote control. Close the gas shut-off v alve(s). Unplug the power supply cord (or disconnect breaker) at l[...]

  • Page 31

    31 Bef or e Y ou Call F or Ser vice… T roubleshooting Tips Sav e time and money! Revie w the charts on the follo wing pages first and you may not need to call for service. CA UTION: For y our safety , DO NOT attempt repair of electrical wiring, gas piping, r emote control, b urners, vent connectors or other safety devices. Refer r epairs to quali[...]

  • Page 32

    Err or Code Guide: When an error code is displayed: ● Close the hot water faucet, turn of f the switch on the remote control. ● W ait for about 5 minutes before turning the switch on again. ● Open the hot water faucet. If the error code remains in the display: ● Close the hot water faucet and turn of f the switch on the remote control. ● [...]

  • Page 33

    33[...]

  • Page 34

    Required adjustment f or up to 140°F (60°C) water temperature settings W ARNING: Refer to scald potential warnings on page 4 before making adjustment. Changing this setting is done at your own risk. DO NO T alter the #4 DIP Switch if the setting of up to 140°F (60°C) is not required. Follo w the instructions below if it is determined that a set[...]

  • Page 35

    35 Notes:[...]

  • Page 36

    36 IF Y OU NEED SER VICE 1. Should you hav e any questions about your ne w water heater , or if it requires adjustment, repair , or routine maintenance, it is suggested that you first contact your installer , plumbing contractor or previously agreed upon service agenc y . In the event the f irm has mov ed, or is unav ailable, refer to the telephone[...]