Rheem RTE 27 Series Use and Care Manual - Page 8

Installing the water heater. Water Connections 1. All plumbing work must comply with national applicable state and local plumbing codes. 2. Make certain that the cold water supply line has been flushed to remove any scale and dirt. 3. Install isolating valve in cold water line to allow the unit to be isolated for maintenance purposes. 4. Cold water connection (inlet) is on the right side of the unit, hot water connection (outlet) is on the left side of unit. NOTICE: Excessive heat from soldering on copper pipes near the tankless water heater may cause damage. 5. Tankless water heaters are not required to be equipped with a Pressure and Temperature Relief Valve (PTRV). If the local inspector will not pass the installation without a PTRV, it should be installed on the hot water outlet side of unit. 6. When all plumbing work is completed, check for leaks and take corrective action before proceeding. Very Important Use only the compression fitting ring and nut provided with each unit as shown in drawing. Important Test the installation for leaks before connecting the electrical supply. Check with a professional electrician for required breaker and wire gauge. Compression fittings are designed exclusively for this unit. Do not use a different type of threaded coupling. HOT WATER OUT COLD WATER IN Figure 2 COMPRESSION FITTING RINGS COMPRESSION FITTING NUTS 8