Bradford White RE2H50S 1NCTT Series Installation/Operation Instruction Manual page 23

Maintenance cont.-
Draining and Flushing the Water Heater
Shut OFF power to the water heater before draining water to avoid risk of shock.
Before manually operating the relief valve, make certain no one will be exposed to the danger of coming in
contact with the hot water released by the valve. The water may be hot enough to scald person(s) nearby.
The water should be released into a suitable drain to prevent injury or damage.
A water heater's tank can act as a settling basin for solids suspended in the water. It is therefore not
uncommon for hard water deposits to accumulate in the bottom of the tank. To clean the tank of these
deposits, it is recommended to drain and flush the water heater tank once a year.
Draining the Water Heater
1. Turn OFF the power to the unit. The electric heating elements will become damaged if operated without
water.
2. Attach a hose to the drain valve located at the bottom of the unit and direct the hose to a drain.
3. Turn OFF the cold water supply.
4. Admit air to the tank by opening a hot water faucet or lifting the handle on the relief valve.
5. Open the drain valve with a flat screwdriver.
Flushing the Tank
Flushing should be done with an empty tank to promote
additional removal of sediment.
1. Follow the steps above to drain the water heater.
2. Once the water heater is empty, with the drain
valve open and hose attached to the drain valve,
turn on the cold water supply.
3. Allow several gallons to flush through the drain valve and hose to an open drain.
4. Turn OFF the water supply and allow any water remaining in the tank to drain.
5. Repeat steps 3 and 4 until the water runs clear.
6. Close the drain valve and fill the tank BEFORE returning power to the unit. The tank is full when water
runs out of a nearby open hot water faucet.
Cleaning the Filter
In the Hybrid and Heat Pump (Only) modes, the water heater pulls air through the filter and out the back of the
unit. The filter is in place to protect the evaporator from dirt and dust.
A clean air filter is important to get the highest efficiency. Occasionally this filter will need to be cleaned. When
the filter requires cleaning, the red light above the FILTER button will illuminate and an alarm will sound.
Filter must be cleaned when the alarm is displayed. A dirty filter will make the system work harder and result
in a reduction of efficiency and cause possible damage to the system. In order to get the best energy
Note: If the filter gets too dirty, the unit will automatically switch to Electric (Only) Mode and energy savings will
be lost.
IMPORTANT!
efficiency available, make sure the filter is clean.
DANGER
DANGER
Use a flat
screwdriver to
turn valve
23