Univex 318258-000 ユーザーズマニュアル

14

Manually operate the temperature and pressure relief valve 
at least once a year to make sure it is working properly. 
To prevent water 
damage, the valve 
must be properly 
connected to a 
discharge line which 
terminates at an 
adequate drain.
Standing clear of the 
outlet (discharged 
water may be 
hot), slowly lift and 
release the lever 
handle on the 
temperature and 
pressure relief valve to allow the valve to operate freely and 
return to its closed position. If the valve fails to completely 
reset and continues to release water, immediately 
disconnect the electrical power, close the cold water inlet 
valve and call a qualifi ed person. 

It is recommended that the tank be drained and fl ushed 
every 6 months to remove sediment which may build up 
during operation. The water heater should be drained if 
being shut down during freezing temperatures. To drain the 
tank, perform the following steps:

Figure 11

T emperature and Pressure 
Relief V alve 

Manual Relief 
Va lv e 

Discharge line to drain 

Place the water heater in Standby Mode by pressing 

1. 

the power button on the user interface module.

Turn off the power to the water heater at the circuit 

2. 

breaker/fuse box.

Open a nearby hot water faucet until the water is no 

3. 

longer hot.

Close the cold water inlet valve.

4. 

Connect a hose to the drain valve and terminate it to an 

5. 

adequate drain or external to the building.

Open the water heater drain valve and allow all of the 

6. 

water to drain from the tank. Flush the tank with water 

as needed to remove sediment.

Close the drain valve, refi ll the tank (open the cold 

7. 

water inlet valve), and restart the heater as directed in 

this manual. 

 Do not turn on power to the water heater 

unless it is completely fi lled with water. To ensure that 

the tank is full, open a hot water faucet and allow the 

water to run until the air is purged and the water fl ows 

uninterrupted from the faucet.

Press the power button to turn the water heater on. 

8. 

 The water heater will conduct a system 

diagnostic prior to operation.

 

If the water heater is going to be shut down for an extended 
period, the drain valve should be left open. 

Replacement heating elements must be of the same style 
and voltage/wattage rating as the ones originally in the water 
heater. This information can be found on the fl ange or terminal 
block of the element or on the water heater data plate.

 Before replacing any element confi rm that 

you have the correct replacement element (wattage). This 
water heater has a 4500 watt upper element and a 2000 
watt lower element. DO NOT replace the element(s) with a 
wattage different than the ones specifi ed for the upper and/
or lower element. 

 Using an element greater than 2000 watts 

in place of the lower element will damage the water heater 
and void the warranty.

Press the power button on the user interface module to 

1. 

p

lace the water heater in Standby Mode

.

Turn off the power to the water heater.

2. 

Drain the water heater as directed in the “Draining   

3. 

and Flushing” section.