Installation manual

CM-02-001
TYTANu DI Water Heater
O.I. 6/27/03 Installation, Operation and Maintenance Manual
ECO page 17
4.1.7 Measuring PID Constants: (Continued)
8. Start heater(s) via the Off-On-Reset switch.
9. When the process is complete, the “AT” LED will stop flashing. The appropriate PID tuning parameters are now installed
and retained in the non-volatile memory.
Note: To abort auto tuning, the operator must reset the "AT" parameter to "OFF". This leaves the
unit in an On/Off heat control state in auto operation at the displayed set point. All PID values are
set to "0".
4.1.8 Notes On Measuring PID Constants:
1. The measurement of PID constants is applicable to heating systems only. Start the measurement with temperature
balanced in the controlled system.
2. If the indicated temperature is below 36°F (20°C) and the temperature difference between the indicated temperature and
the set temperature is not at least 36°F (20°C) the measurement of PID constants can not be performed. In such case,
change the set value to obtain a greater temperature difference (at least 36°F (20°C).) When the indicated temperature is
below 36°F (20°C), manually raise it to above 36°F (20°C).
3. If a power failure occurs during the measurement, restart the measurement after returning the heating system to normal
ambient temperature.
4.2 Over-Temperature Controller FDC-L91:
1. This over-temperature controller is located inside the electrical portion of the Tytan
heater. It uses a separate temperature sensor to monitor the temperature on the
surface of the heating elements.
2. This controller has two discreet set points:
SP2: This is the over-temperature cutoff setting, which is set for 18°F
(10°C) ABOVE the primary set point on the temperature controller.
HSP1: This is an element high-temperature alarm setting, which is
factory set at 248°F (120°C). Do not adjust this setting.
4.2.1 Programming:
Every time the primary set point of the main controller E5CK, the SP2 setting on the over-temperature controller FDC-L91 must
be changed manually.
To Change the SP2 set point on the FDC-L91 over-temperature controller, follow the following procedure:
Do not change any of the other settings in this controller.
1 ) Turn the “Enable Heater” switch to the Off position. Leave the “Control Power” switch in the On position.
2 ) Open the door to the control-portion of the unit.
Figure 5: Over-temperature
controller