Rheem RMTG-66DV, P) Leak Testing, Pressure Testing the Gas Supply System, High Altitude

Page 18

Installing the Main Remote Control:

WARNING: Do not attempt to convert this water heater for use with a different type of gas other than the type shown on the rating plate. Such conversion could result in hazardous operating conditions.

Manual

Gas

Supply

Line

Shutoff (Valve)

Manual Gas

Appliance

Shutoff

(Supplied)

Union

Sediment Trap

Cap

Gas Supply

The supplied Manual Gas Appliance Shutoff Valve must be installed at the gas connection of the water heater at the time of installation (see diagram to the left)..

The branch gas supply line to the water heater should be a minimum of 3/4” black steel pipe or other approved gas piping material..

A ground joint union or ANSI design certified semi-rigid or flexible gas appliance connector should be installed in the gas line close to the water heater.. The National Fuel Gas Code (NFGC) ANSI Z223..1 and CAN B149 code mandates a manual gas shut-off valve: See NFGC & B149 for complete instructions..

If flexible connectors are used, the maximum length shall not exceed 36” (91 cm)..

If lever type gas shut offs are used, they shall be T-Handle type..

Compound used on the threaded joints of the gas piping must be of the type resistant to the action of LP gas.. Use compound sparingly on male threads only..

A sediment trap should be installed at the bottom of the gas line..

Do not use excessive force (over 31..5 ft lbs.. [42..7 Nm]) in tightening the pipe, particularly if teflon pipe compound is used, as the unit may be damaged..

The inlet gas pressure to the water heater must not exceed 10..5” w..c.. (2..6 kPa) for natural or 14” w..c.. (3..5 kPa) for LP gas.. For purposes of input adjustment, the minimum inlet gas pressure (with main burner on) is shown on the water heater rating plate.. If high or low gas pressures are present, contact your gas supplier for correction..

NOTICE: To ensure proper operation of the heater the gas pipe and gas meter must be sized correctly..

Gas piping shall be in accordance with local, utility company requirement and/or in the absence of local codes, use the latest edition of the National Fuel Gas Code.. In Canada, the latest edition of CSA B149..1 Natural Gas and Propane installation code..

WARNING: Never use an open flame to test for gas leaks, as property damage, personal injury, or death could result.

Leak Testing

The water heater and its gas connections must be leak tested at normal operating pressures before it is placed in operation..

Turn on the gas shut-off valve(s) to the water heater..

Use a soapy water solution to test for

leaks at all connections and fittings.. Bubbles indicate a gas leak that must be corrected..

The factory connections should also be leak tested after the water heater is placed in operation..

WARNING: Install a gas pressure regulator, in the gas supply line, which does not exceed the maximum supply pressure.

DO NOT use an industrial type gas regulator.

Pressure Testing the Gas Supply System

The water heater and its manual gas shut-

The water heater must be isolated from the

off valve must be disconnected from the gas

gas piping system by closing the manual gas

supply piping system during any pressure

shut-off valve during any pressure testing of

testing of the system at pressures in excess

the gas supply piping at pressures equal to or

of 1/2 psi (14” w..c.. [3..5 kPa])..

less than 1/2 psi (14” w..c.. [3..5 kPa])..

High Altitude

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 3,280 feet (1,000 m) elevation, contact a quaili- fied service technician to make the proper altitude adjustment. See page 35 for ad- ditional information.

Do not install this water heater at eleva- tions above 3,280 feet (1,000 m) without the proper adjustement. Please contact your installer, local gas supplier, place of purchase or the Customer Service phone number as listed in this Use & Care Manu- al for more information.

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Contents Tankless Water Heater For Your Records Install and properly vent the water heater…  & # 0 Natural gas and liquefied petroleum models For Installations in the State of California Installing the water heater Location of Water HeaterCorrosive Atmospheres Inspect ShipmentVenting Venting LengthsVenting Through Closed Spaces Appliance Vent AdapterDraining the Condensate Canadian Installations US Installations Horizontal Vent Terminal LocationIndoor Water Heater Additional ConsiderationsHorizontal Vent Installation Vertical Vent Installation Vertical Vent Termination LocationMounting the Water Heater Thermal ExpansionWater Supply Connections Cold and hot water connections Lines.Air Relief Valve Drain Valve Shown on Right without TubingGas Supply Leak TestingPressure Testing the Gas Supply System High AltitudeRemote Control Installation Projections Power Cord Electrical ConnectionTypical Installation of Water Heater Venting Required Per Foot Downward PitchHot and Cold Pipe Insulation Installation During Installation of this water heater…Insulation Blankets Installation Check List Indoor Water Heater LocationLighting the water heater Safety Precautions Water Temperature SettingTime/Temperature Relationship in Scalds Water Temperature Setting… Routine Preventative Maintenance HousekeepingVacation and Extended Shut-Down Venting System InspectionBurner Inspection Condensate Trap InspectionDraining the Water Heater Freeze ProtectionBefore You Call For Service… Error Code Guide Replacement Parts 135F 57C DIP If YOU Need Service