Duty Immersion Heater - 18kW Circuit
EB0027
Duty Immersion Heater 18kW is the lead heater to supply hot water to the
building. It is combined in the housing with the backup immersion heater.
The 18kW element is made up of 3 circuits of 6kW, and each circuit is made up of
three 2kW rods connected by links. All neutrals are connected together.
Part Name:
Adveco Part Number:
Function:
Specifics
:
Testing:
1. With the power off, measure the resistance between 1L1/1N1, 1L2/1N1, and 1L3/1N1 in the control panel.
The correct reading is 9Ω. If a rod element has failed then the resistance will be 13Ω, and if two have failed then
the measured resistance will be 26Ω.
2. With the power on, all CB's on, and the Dual Stat - Element Stat 18kW turned all the way up, measure voltage
between 1L1/E, 1L2/E, and 1L3/E. The correct reading is 230V. If 0V is measured at these points, proceed to test
K1M.
3. With the power on, all CB's on, and the Dual Stat - Element Stat 18kW turned all the way up, measure the
current in the cables from 1L1, 1L2, and 1L3. The correct reading is approximately 26A, but will vary slightly
depending upon site voltage. If a value of approximately 17A is measured, a single rod element has failed. Further
failures will return lower amperages, and 2kW of heating output is lost for each failed rod. It is recommended that
the immersion heater is not replaced until the total lost capacity reaches 8kW, or there is a phase imbalance greater
than 4kW.
EB0028
3. Troubleshooting
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P R A C T I C A L , E F F I C I E N T & S U S T A I N A B L E B U I L D I N G S E R V I C E S S O L U T I O N S
EB002
5-EB0028-EB0030 Control Panel
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Installation and maintenance manual
