Rheem RMTG-66DV - Manuals

5 Both LP and natural gas have an odorant added to aid in detecting a gas leak. Some people may not physically be able to smell or recognize this odorant. If you are unsure or unfamiliar with the smell of LP or natural gas, ask the gas supplier. Other conditions, such as “odorant fade”, which causes...

6 IMPORTANT SAFETY INFORMATION READ ALL INSTRUCTIONS BEFORE USING . ! WARNING! For your safety, the information in this manual must be followed to minimize the risk of fire or explosion, electric shock, or to prevent property damage, personal injury or loss of life. FOR INSTALLATIONS IN THE STATE OF...

1” (2 .5 cm) min 1” (2 .5 cm) min 1” (2 .5 cm) min Coaxial Vent Pipe & Air Intake ! WARNING: Follow vent manufacturer’s instruction while installing vent. If required, provide additional clearances from vent to combustibles per vent manufacturer’s instruction. 7 Installing the water heater : Thi...

Installing the water heater: Corrosive Atmospheres The air in beauty shops, dry cleaning establishments, photo processing labs, and storage areas for liquid and powdered bleaches or swimming pool chemicals often contains such halogenated hydrocarbons .An air supply containing halogenated hydrocarbon...

The water heater must be installed with a 3”/5” diameter UL approved Category III Coaxial Stainless Steel appliance coaxial vent pipe and an appropriate adapter. Venting The installation of venting must comply with national codes, local codes and the vent manufacturer’s instructions . The water heat...

Installing the water heater: Venting 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 vent pipe and combustibles and noncomb...

D V V E FIXE D CLO SED OPE RAB LE OPE RAB LE FIXE D CLOS 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 vent terminal for direct vent tankless water heaters . V Vent terminal X air Supply inlet area Where ter...

Installing the water heater: Additional Considerations Do NOT install vent terminal under any patio or deck . To help prevent moisture from freezing on walls and under eaves, do not locate vent terminal on the side of a build ing with prevailing winter winds . To help prevent water lines from freezi...

Example A: Typical Horizontal Termination w/ 7/8” per foot DOWNWARD Slope 13 Installing the water heater: 94° Elbow Outer Wall Inner Wall Plate Wa ter Heater Outside Wall Side View Caulk for weather seal Inner Wall Outer Wall Plate Vent Pipe Mounting Brackets Appliance Vent Adapter Side View WARNING...

Installing the water heater: Vertical Vent Installation A fire stop plate should be installed at every 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 building insulation .Once the vent ter...

15 Water Supply Connections IMPORTANT: Do not apply heat to the HOT or COLD water connections. If sweat connections are used, sweat tubing to adapter before fitting adapter to the water connections on heater. Any heat applied to the water supply fittings will permanently damage the internal componen...

Installing the water heater: Water Supply Connections, continued Notice: If the water flow resistance of a shower head is too high, the burner in the water heater will fail to ignite . Keep the shower head clean from debris that could cause additional pressure drop . Notice: If using mixing valves o...

Relief Valve A new pressure relief valve, complying with the Standard for Relief Valves and Automatic Gas Shut-Off Devices for Hot Water 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...

This water heater is certified for installations up to 3,280 feet (1000 m) above sea level . The input rating of this water heater is based on sea level operation . At higher elevations, the actual input rate may be lower than the value listed on the rating label . NOTICE: For installations above 3,...

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): ...

Electrical Connection POWER CORD: ● The electric power supply requirement for this water heater is 120 VAC/60HZ, 2 Amps . ● The water heater comes with a three (3) pin power supply cord . Use only a power outlet with a ground terminal . ● The installation of an GFCI (Ground Fault Circuit Interrupter...

22 Installing the water heater: Typical Installation of Water Heater (Venting Required) Wall Plate Outside Wall Outside Wall With Protective Vent Termination Screen 94° Elbow Vent Adapter Power Supply Cord 7/8” Per Foot Downward Pitch Discharge Line (To Suitable Drain) To Hot Water Faucet(s) Relief ...

Installing the water heater: A. Indoor Water Heater Location ❑ Close to area of vent termination . ❑ Indoors and protected from freezing temperatures . ❑ Proper clearance from combustible surfaces observed . ❑ Sufficient fresh air supply for proper operation of water heater . ❑ Air supply free of co...

25 Lighting the water heater: Before operating this water heater, be sure to read and follow the instructions on the label pictured below and all other labels on the water heater, as well as the warnings printed in this manual. Failure to do so can result in unsafe operation of the water heater, res...

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...

27 Water Temperature Setting… Maximum water temperature occurs while the burner is on . To determine the water temperature, turn on a hot water faucet and place a thermometer in the water stream . Water temperature at the faucet may vary depending on season and length of pipe from the water heater ....

Care and cleaning of the water heater: Housekeeping Before performing Housekeeping tasks to this water heater, turn the unit off and disconnect the power supply .Vacuum around the water heater for dust, dirt and lint on a regular basis . Clean the water heater and remote control by using a damp soft...

Draining the Water Heater Below are instructions for draining water out of the water heater . Turn off the switch on the remote control . Close the gas shut-off valve(s) . Unplug the power supply cord (or disconnect breaker) at least 10 seconds after step #1 . Open all hot water faucets . Before pro...

31 Before You Call For Service… Troubleshooting Tips Save time and money! Review the charts on the following pages first and you may not need to call for service . CAUTION: For your safety, DO NOT attempt repair of electrical wiring, gas piping, remote control, burners, vent connectors or other safe...

Hot Water Outlet Error Code Guide: When an error code is displayed: ● Close the hot water faucet, turn off the switch on the remote control . ● Wait 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 ...

33 Replacement Parts: Direct Vent Water Heater Instructions For Placing a Parts Order Address parts orders to the distributor or store where the water heater was purchased .All parts orders should include: The model and serial number of the water heater from the rating plate . Specify type of gas (n...

Required adjustment for up to 140°F (60°C) water temperature settings ! WARNING: Refer to scald potential warnings on page 4 before making adjustment . Changing this setting is done at your own risk . DO NOT execute the following adjustment if the setting of up to 140°F (60°C) is not required.Follow...

35 The content on this page is intended for use by qualified installation/service personnel ONLY. WARNING: Improper adjustment, altera- tion, service or maintenance can cause prop- erty damage, personal injury, or death. Minimum Temperature Adjustment by the Main Remote Control (UMC-117, USC1-117 an...

36 IF YOU NEED SERVICE 1 . Should you have any questions about your new 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 agency . In the event the firm has moved, o...