Rheem Professional Classic Plus Series: Atmospheric- Manuals

6 Have the installer show you the location of the gas shut-off valve and how to shut it off ifnecessary. Turn off the manual shut-off valve if the water heater has been subjected tooverheating, fire, flood, physical damage or if the gas supply fails to shut off. ● Read this manual entirely before in...

Installing the water heater. This water heater must be installed in accordance with these instructions, local codes, utility companyrequirements, and/or in the absence of local codes, use the latest edition of CAN/CSA B149 - NaturalGas and Propane Installation Code. A copy can be purchased from the ...

8 Installing the water heater. Combustion and Ventilation Air Proper operation of the water heaterrequires air for combustion andventilation. Provisions for combustionand ventilation air must comply withreferenced codes and standards. When installed in a closet, DO NOT block or obstruct any of the c...

9 Thermal Expansion Determine if a check valve exists in the inlet water line. Check with your local water utilitycompany. It may have been installed in the cold water line as a separate back flow preventer, or it may be part of a pressure reducing valve, water meter or water softener. A check valve...

10 Installing the water heater. A new combination temperature and pressure relief valve, complying with the Standard for Relief Valvesand Automatic Gas Shut-Off Devices for Hot Water Supply Systems, ANSI Z21.22, is supplied and mustremain in the opening provided and marked for the purpose on the wat...

12 Installing the water heater. The water heater must be installed with the factory supplied draft hood in place. Venting Insulation Blankets Vent connectors must be attached to thedraft hood outlet to connect the waterheater to the gas vent or chimney. Thevent connectors must be the same size(diame...

13 For increased energy efficiency, somewater heaters have been supplied withtwo 24” (61 cm) sections of pipeinsulation. Please install the insulation, according tothe illustrations above, that best meetsyour requirements. DO ❑ DO check inlet gas pressure to ensure that it is within the range specif...

14 Installation Checklist A. Water Heater Location B. Water Supply C. Gas Supply D. Relief Valve E. Venting ❑ Close to area of vent. ❑ Indoors and protected from freezing temperatures. ❑ Proper clearance from combustible surfaces observed and water heater not installed on carpeted floor. ❑ Sufficien...

Tee fitting for vertical hotwater supply lines. Hot watersupply to house From HOT outlet on water heater Hot watersupply to heatingunit Supplemental instructions for gas water heaters installedin potable/space heating applications. Local codes or plumbing authority requirements may vary from the ins...

16 Lighting the water heater. Before operating this water heater, be sure to read and follow the instructions on the label picturedbelow and all other labels on the water heater, as well as the warnings printed in this manual. Failure todo so can result in unsafe operation of the water heater result...

17 Time/Temperature Relationship in Scalds Water Temperature Time To 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...

18 Operating the water heater. Water Temperature Setting… Maximum water temperatures occur justafter the burner has shut off. To determinethe water temperature, turn on a hot waterfaucet and place a thermometer in thewater stream. The wide reference mark near WARM on the rim of the temperature dial,...

19 Care and cleaning of the water heater. Draining the Water Heater CAUTION: Shut off gas to the water heater at the gas control (thermostat) gas cock or manual shut-off valve beforedraining water. DANGER: Before manually operating the temperature and pressure relief valve, makecertain no one will b...

20 Venting System Inspection The water heater’s internal flue must beinspected annually to be certain it is cleanby removing the draft hood and fluebaffle. When reinstalling the flue baffle makecertain it is hung securely by its hanger atthe top of the flue way. Reinstall the draft hood. Inspect the...

21 Problem Possible Causes What To Do Condensation This usually happens when This is normal. After the water in the tank warms a new water heater is up, the condensation will disappear. If, however, the filled for the first time. condition persists, examine the piping and fittings for possible leaks...

23 Replacement Parts. For 30, 40,50, and 60 gallon models using natural or LP gas. Instructions For Placing a Parts Order Call 1-800-268-6966. All parts orders should include: The model and serial number of thewater heater from the rating plate. Specify type of gas (natural or LP)as marked on the ra...

IF YOU NEED SERVICE 1. Should you have any questions about your new water heater, or if it requiresadjustment, repair, or routine maintenance, it is suggested that you first contact yourinstaller, plumbing contractor or previously agreed upon service agency. In the eventthe firm has moved, or is una...