1. Attach the mounting hardware to the framing members as recommended. Make sure the unit will be level and positioned so the tankless water heater will meet minimum clearance requirement.
2. Set the tankless water heater onto the mounting hardware. Run code-approved vent pipe from unit out of the house. Follow local code regarding length of the vent and placement of the termination.
3. Attach the exhaust connector and gasket at the exhaust condensate tube or trap in the exhaust line of required by code.
4. Run gas supply line from the main and connect to the tankless water heater unit as directed. Pipe material and size must meet minimum standards for the unit. Flexible copper lines generally are not allowed. Black iron pipes are preferred for natural gas. While installing tankless water heater, make sure that line is equipped with a manual shutoff valve near the heater unit.
5. Run cold water supply to the water inlet port on the tankless water heater unit and connect as directed. Insert an inlet filter screen between the supply line and the inlet port.
6. Connect a pressure relief valve (PRV) to the hot supply line; confirm that any shutoff valves located downstream from the pressure relief valves. Connect the hot water outlet to the correct outlet port with a compression fitting. Attach a discharge line to the pressure relief valve if required by code.
7. Follow manufacturer’s instructions to make the electrical connections to operate the blower fan and control panel. Most tankless water heater units must be independently grounded. Replace cover plate when finished. Tankless water heater must pass the inspection before use. This typically includes leak and pressure inspections on the gas and water lines. Replace cover plate when finished.
8. Test the gas line for leaks by brushing soap suds onto the connections. Leaking gas will cause the suds to bubble up. Follow the manufacturer’s instructions for setting up, operating, and maintaining your tankless water heater unit.
2. Set the tankless water heater onto the mounting hardware. Run code-approved vent pipe from unit out of the house. Follow local code regarding length of the vent and placement of the termination.
3. Attach the exhaust connector and gasket at the exhaust condensate tube or trap in the exhaust line of required by code.
4. Run gas supply line from the main and connect to the tankless water heater unit as directed. Pipe material and size must meet minimum standards for the unit. Flexible copper lines generally are not allowed. Black iron pipes are preferred for natural gas. While installing tankless water heater, make sure that line is equipped with a manual shutoff valve near the heater unit.
5. Run cold water supply to the water inlet port on the tankless water heater unit and connect as directed. Insert an inlet filter screen between the supply line and the inlet port.
6. Connect a pressure relief valve (PRV) to the hot supply line; confirm that any shutoff valves located downstream from the pressure relief valves. Connect the hot water outlet to the correct outlet port with a compression fitting. Attach a discharge line to the pressure relief valve if required by code.
7. Follow manufacturer’s instructions to make the electrical connections to operate the blower fan and control panel. Most tankless water heater units must be independently grounded. Replace cover plate when finished. Tankless water heater must pass the inspection before use. This typically includes leak and pressure inspections on the gas and water lines. Replace cover plate when finished.
8. Test the gas line for leaks by brushing soap suds onto the connections. Leaking gas will cause the suds to bubble up. Follow the manufacturer’s instructions for setting up, operating, and maintaining your tankless water heater unit.
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