Hubbell Electric Heater Company EMV User Manual

 

 

10 

 
QUARTERLY INSPECTION  
3.  Monitor thermostat 

a.  Let water heater completely heat to a designated thermostat setting. 
b.  After thermostat satisfies (that is, when the thermostat actually clicks off), draw water from the relief 

valve. 

c.  Compare water temperature of drawn water to the temperature setting of the thermostat when it 

satisfies. Normal variation between the two points is approximately + 7°F. 

d.  If these two readings do not coincide within acceptable tolerances and verification has been made of 

the accuracy of the temperature-reading gauge, replace the thermostat. 

4.  Lift test lever on relief valve and let water run through valve for a period of approximately 10 seconds. 

This will help flush away any sediment that might build up in water passageways. 

5.  Inspect element flange for leakage as follows: 

a.  Shut off Power Supply. 
b.  Remove element housing cover. 
c.  Visually inspect heating element gasket for evidence of   leaks.  
d.  Rub finger around gasket that is between the heating element and tank flange for any evidence of 

moisture. If moisture is present or a water drip is observed, follow procedure outlined in Section V. 

6.  Check for loose electrical connections. Tighten as necessary. 
ANNUAL INSPECTION 
1.  Flush tank as follows 

a.  Shut off power supply. 
b.  Close valve on hot water outlet piping. 
c.  Open valve on drain piping. 
d.  Cold water inlet line pressure will be strong enough to flush sediment from the bottom of the tank out 

through the drain. Let water run for 3-4 minutes. 

e.  Close drain valve. 
f.  Open hot water valve. 
g.  Turn power supply ON.