Installing the water heater.
Water Supply Connections Continued.
Install a shutoff valve near the inlet of the water heater for service and draining purposes.
DO NOT use pipes with smaller diameters than the water supply connection of the water heater.
Before connecting the water supply pipe to the water heater, open the shutoff valve and clean out sand, debris, air, caulking material, etc. inside the pipe. Connect to the water inlet, then check water flow.
Close the shutoff valve and clean the water filter.
Be sure to connect the water inlet and the hot water outlet as shown on the water heater. If reversed, the water heater will not function.
Installation of unions or flexible copper connections are recommended on the HOT and COLD water lines, so that the water heater may disconnect easily for servicing if necessary.
Install a Check Valve between the water heater and the water shutoff valve. (See illustration the top left).
The following should be addressed in regards to the HOT WATER OUTLET:
Connections between the water heater and point(s) of use should be as short and direct as possible.
DO NOT use lead or plastic pipe.
To conserve energy and minimize heat loss, insulation of hot water piping is recommended.
Notice: The flow rate of hot water may vary when more than two faucets (appliances, fixtures, etc.) are being used simultaneously.
Notice: The pipes MUST be completely drainable. If the hot water faucets are located at a point higher than the water heater, place a drain valve at the lowest point (see diagram to the left).
| Relief Valve |
| A new pressure relief valve, complying |
| with the Standard for Relief Valves and |
| Automatic Gas |
| Water Supply Systems, ANSI Z21.22, |
| must be installed at the hot water outlet |
| connection of the water heater at the |
| time of installation. Local codes shall |
F | govern the installation of relief valves. |
The discharge line must be NO SMALLER than the outlet of the valve and must pitch downward to allow complete drainage (by gravity) of the relief valve and discharge line.
The end of the discharge line should not be threaded or concealed and should be protected from freezing. No valve of any type, restriction or reducer coupling
|
| Hot Water | Cold Water | |
Pressure |
| Supply | ||
| Supply Line | |||
Relief |
| Outlet | ||
| ||||
Valve | Discharge | |||
Valve | ||||
| ||||
|
| line | ||
|
|
| ||
| (To Suitable Drain) |
| ||
| 6 | Air Gap |
| |
Notice: The above illustrates a pressure only relief valve. If local codes require a combination temperature and pressure relief valve be installed, an extension piece may be needed.
For safe operation of the water heater, be sure that:
The pressure rating of the relief valve must not exceed 150 psi, the maximum working pressure of the water heater as marked on the rating plate.
The BTUH rating of the relief valve must equal or exceed the BTUH input of the water heater as marked on its rating plate.
No valve of any type should be installed between the relief valve and the water heater
Discharge from the relief valve should be piped to a suitable drain to eliminate potential water damage. Piping used should be of a type approved for the distribution of hot water.
Hot and cold water lines should be insulated up to the water heater. Refer
should be installed in the discharge line.
Notice: Local codes govern the installation of relief valves. If local codes require that a temperature and pressure relief valve should be installed the manufacturer recommends a type 40XL Watts T&P relief valve or an equivalent model be used.
Notice: Manual operation of relief valves should be performed at least once a year. Turn off the electrical power and gas shutoff valve. Lift and release lever on the relief valve and check the manual operation of the relief valve. You should take precaution to avoid contact with the hot water coming out of the relief valve and to prevent water damage.
Notice: If the relief valve on the system discharges periodically, a problem exists and service to the water system is
10
required.