09/19
Model TWBS.EW.H
Page 8 of 11
Using an ohmmeter test the resistance of the heating element across the two threaded
termination rods on top of the element.
See the front cover of this manual for the correct value.
If the resistance is much greater than the correct value, call your supplier for a
replacement element.
SYMPTOM: NO HEAT OR LOW TEMPERATURE WITH INDICATOR LIGHT ON
1)
WATER FLOW TOO HIGH
Reduce the water flow by using an outlet ball valve. Temperature rise is 41° at 4 GPM.
2)
INCORRECT POWER SUPPLY
Make sure that the unit is connected to the voltage supply specified on the rating label on
the front cover of the unit and no other.
3)
ELEMENT BURNED OUT- TURN OFF THE MAIN BREAKER!
Repeat the steps from paragraph 4 above.
4)
THERMOSTAT ADJUSTMENT SCREW NOT TURNED UP
Turn the thermostat adjustment screw clockwise in small increments until the indicator light
remains on. Take care not to force the screw past its stop position.
REPLACEMENT PARTS
DESCRIPTION
QUANTITY
Temperature Gauge, 1/2”
1
Heater
1
Bypass Valve, 1/2"
1
Hot Shut-
off Valve, 1/2”
1
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