User Instructions
Section 6
Maintenance ________________________________________________
Section Contents
䊳 Shut Down
䊳 Heater Removal/Replacement
䊳 Pump Removal/Replacement
䊳 Heat Exchanger Removal/Replacement
(closed loop systems)
Disconnect all power before servicing or performing
maintenance to the system. Do not attempt to service system
while it is operating.
Failure to comply can result in:
a. Electrical shock or electrocution.
b. Burns from hot heating elements, piping, and hot water.
c. Injury from operating or rotating pump and motor.
Maintenance is to be performed by qualifi ed personnel only.
Thoroughly read and understand these instructions. Consult
the factory if you have any questions.
Shut Down
To take the unit out of service, the following steps must be done
in sequence:
1. Set the temperature controller setpoint to 90°F or lower.
Allow to cool.
2. Turn off power to the unit. The controller will turn off.
3. Turn off the water supply to the unit.
4. Disconnect electrical supply to the unit.
5. Carefully bleed pressure from the system by loosening a pipe
fi tting.
System may be pressurized. Use extreme care while removing
piping. Disconnect water supply, drain and process connections.
6. Drain all water from the system.
WARNING
WARNING
23
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