Rinnai RH180 Installation Manual Page 1

— Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any othe

10 RH180 Manual Checklist to Determine Installaon Locaon □ The water heater is not exposed to corrosive compounds in the air. □ The water heater

RH180 Manual 11 Minimum Clearances The minimum clearances from combusbles or non-combusbles construcon, 0 inches from the sides, 0 inches from

12 RH180 Manual A Hot Water Outlet * B Hot Water Outlet Valve * C Temperature-Pressure Relief Valve D Cold and Hot Unions * E Cold Water Suppl

RH180 Manual 13 Combuson Air Requirements This water heater requires adequate combuson air for venlaon and diluon o

14 RH180 Manual Combuson air provided to the appliance should not be taken from any area of the structure that may produce a negave pres-sure (i.e

RH180 Manual 15 When communicang indirectly with the outdoors through vercal ducts, each opening shall have a minimum free area of 1 in2/4000 Bt

16 RH180 Manual Venng This water heater must be vented vercally to the outside of the building or structure. This water heater is not designed or

RH180 Manual 17 Venng Requirements Vent Dampers Vent dampers must be cered in accordance with ANSI Z21.68 Befo

18 RH180 Manual Vent Terminaon All ue (Vent) gases must be directed to the outdoors of the building or structure and must not terminate horizontal

RH180 Manual 19 Venng Requirements Masonry Vercal Venng Masonry Chimneys shall be built and installed in accor

2 RH180 Manual Table of Contents This is the safety alert symbol. This symbol alerts you to potenal hazards that can kill or hurt you and others.

20 RH180 Manual Checklist for Combuson Air and Venng Requirements □ Verify proper clearances around the vents . □ Ensure that the Combuson Air R

RH180 Manual 21 Installaon of Plumbing A manual valve must be placed in the water inlet connecon to the water heater before it is connected to t

22 RH180 Manual Connect Water Heater to Water Supply Water connecons to the tankless water heater should follow all state and local plumbing codes.

RH180 Manual 23 Massachuses - Required Plumbing

24 RH180 Manual  Any compound used on the threaded joint of the gas piping shall be a type which resists the acon of liqueed petroleum gas (prop

RH180 Manual 25 Size the gas pipe The gas supply must be capable of handling the enre gas load at the locaon. Gas line sizing is based on gas t

26 RH180 Manual Connect Electricity Do not rely on the gas or water piping to ground the water heater. A screw is provided in the juncon box for t

RH180 Manual 27 Final Checklist □ The water heater is not exposed to corrosive compounds in the air. □ The water heater locaon complies with th

28 RH180 Manual Technical Data Specicaons Rinnai is connually updang and improving products. Therefore, specicaons are subject to change with

RH180 Manual 29 Dimensions Inches (millimeters) 51.2 (1300) 48.6 (1234) 8 (203) 23.8 (605) 26 (660) 18.7 (475) 24.8 (630) 25.8 (655) 27.5 (698) 10

RH180 Manual 3 Safety Behaviors and Pracces for the Consumer and Installer  Before operang, smell all around the appliance area for gas. Be

30 RH180 Manual Wire Diagram Wire Color Legend W:...WHITE BK:….BLACK BR:….BROWN R:…...RED

RH180 Manual 31 Parts Breakdown ITEM NO.DESCRIPTION OF ENGINE PARTS2 EXHAUST DUCT

32 RH180 Manual Consumer Operaon Guidelines for the Safe Operaon of your Water Heater FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do

RH180 Manual 33 How to Use the Temperature Controller Five temperature sengs are available. Push the up and down arrows to choose your desired t

34 RH180 Manual  Before operang, smell all around the appliance area for gas. Be sure to smell next to the oor because some gas is heavier than

RH180 Manual 35 Diagnosc Codes and Remedies Code Denion Remedy 05 Air Filter Error Follow the procedure “Air Screen Inspecon, Detecon &

36 RH180 Manual Code Denion Remedy 14 Check for restricons in air ow around unit and vent terminal. Thermal Fuse licensed professiona

RH180 Manual 37 System Maintenance To protect yourself from harm, before performing maintenance:  Turn o the electrical power supply by unplugg

38 RH180 Manual Water Filter Inspecon, Detecon & Cleaning A. Inspecon:  To maintain opmum performance, periodical

RH180 Manual 39 Water Heater Tank Drain a pail of water through the drain valve at least once a year. This will remove excess sediment from the bo

4 RH180 Manual FLAMMABLE (INFLAMMABLE) Flammable Vapors (Les Vapeurs Inammables) WARNING DANGER Hot

40 RH180 Manual Hybrid Tank-Tankless Flush Procedure Use the following procedure to ush the heat exchanger of lime or scale build up. Damage cause

RH180 Manual 41 Warranty Informaon The installer is responsible for your water heater’s correct installaon.

42 RH180 Manual What will Rinnai do? Rinnai will repair or replace the covered product or any part or component that is defecve in materials or wo

RH180 Manual 43 Limitaon on warranes No one is authorized to make any other warranes on behalf of Rinnai America Corporaon. Except as express

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RH180 Manual 5 Safety Behaviors and Pracces for the Consumer and Installer FVIR (Flammable Vapor Ignion Resistant) Sensor Flammable liquids s

6 RH180 Manual A licensed professional must install the appliance, inspect it, and leak test it before use. The warranty will be voided due to impr

RH180 Manual 7 Prepare for installaon Parts included Tools needed Materials needed  Make sure the water heater and its water lines are protecte

8 RH180 Manual Environment Air surrounding the water heater is used for combuson and must be free of any compounds that cause corrosion of internal

RH180 Manual 9 Locaon This water heater is not approved for use in manufactured (mobile) homes or outdo