Water temperature below

Faulty thermostat.

Check thermostat adjustment.

settings at all times

 

Monitor thermostat as described in

 

 

Section III, Quarterly Inspection.

 

 

Replace if necessary.

 

Blown fuse in element fuse

Replace fuse.

 

block, if installed.

 

 

Heating element not working

Check to see that heating element

 

on all phases

is working on all phases, by

 

 

checking the resistance (ohms)

 

 

value for each element and

 

 

comparing with the chart included

 

 

in Section VI.

 

Heater improperly sized

Verify heater is properly sized for

 

 

the flow rate and temperature rise

 

 

of your system. See formulas

 

 

included in Section VI. Replace

 

 

elements with proper size as

 

 

necessary.

Relief valve discharges

Excessive temperature or

Temperature and pressure relief

continuously

pressure in tank

valves are made to operate if the

 

 

water temperature exceeds 210°F

 

 

or water pressure exceeds the

 

 

pressure rating of the safety relief

 

 

valve. If trouble is excessive

 

 

temperature, then thermostat is not

 

 

shutting off at the right setting and

 

 

thermostat must be replaced.

15

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Hubbell Electric Heater Company SE manual

SE specifications

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