SERVICE PROCEDURES
FOR QUALIFIED SERVICE PERSONNEL ONLY
TO REPLACE HEATING ELEMENT
1. Shut off electrical power to unit.
2. Shut off water supply to unit.
3. Drain water from unit by tilting the unit toward at the end of the drain cycle.
4. Remove control box cover and disconnect electric wire from electrical connection to the
heating element(s).
5. Remove (4) screws and pull out heating element(s) with gasket.
6. Install new heating element(s) with gasket.
7. Connect electrical wires to elements).
8. Repeat priming instructions.
TO REPLACE THERMOSTAT
1. Shut off electrical power to unit.
2. Remove control box cover and thermostat knob.
3. Disconnect electrical wires from thermostat.
4. Loosen small capillary nut, then the packing nut from boiler.
5. Remove (2) screws holding thermostat to side box.
6. Remove thermostat and pull out thermostat bulb from boiler. Note position of compression
ring on capillary tube.
7. Install new thermostat. Position capillary end of thermostat bulb two (2) inches from inside
wall.
8. Tighten large packing nut, then small capillary nut — DO NOT over tighten since this could
damage the controls.
9. Remount thermostat to control box side.
10. Re-connect electrical wires to thermostat.
11. Replace thermostat knob.
12. Repeat priming instruction.
13. Recalibrate control if required. Water temperature should be 195 to 205 degree F
maximum.
TO REPLACE HI-LIMIT CONTROL
1. Shut off electrical power to unit.
2. Remove control box cover and disconnect (4) electrical wires form control.
3. Loosen and remove (2) retaining nuts.
4. Install new control in reverse order.
REPLACING WATER INLET CONTROL VALVE
1. Shut off water supply to unit.
2. Disconnect water line from control valve.
3. Unscrew floatball.
4. Remove hex nut and washer while holding the valve/float arm assembly with the other
hand.
5. Install replacement valve in reverse order.
REPLACING FLOATBALL
1. Shut off water supply to unit.
2. Unscrew float ball. Check for water leaks by shaking the ball.
3. Replace defective float ball.
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