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8) Change new setpoint for heating. Enter new value and then select the Set Pump
Heaters button.
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Example: If there are 20 zones of which 19 zones are OK, only one zone is required to
autotune. Alternatively, you may wish to add an extra zone. In these cases, you do
not need to autotune all zones.
To autotune an individual zone, you must first disable all other zones by clicking on their
Enable/Disable buttons so that the ‘Disable’ legend is displayed with a red indicator. After
disabling these zones, click on the WarmStart_PLC button.
To autotune or retune an individual zone:
1) Select the Enable button for the zone to be autotuned or retuned and disable all
other zones.
2) Enter the required setpoint.
3) Select the Set Pump Heaters button.
4) Select the Set Autotune button.
5) When the temperature has reached the selected setpoint wait for 30 minutes.
6) Autotune is now complete.
7) To autotune a further zone, repeat Steps 1) to 6).
8) For all zones disabled in Step 1) click on their Enable/Disable buttons so that the
‘Enable’ legend is displayed with a green indicator.
9) Select the Enable button.
10) Select the WarmStart_PLC button. The ‘Comms OK’ indicator (Green) will change to
‘Comms error’ (Red) for a few seconds and then return to ‘Comms OK’ (Green).
NOTES:
If any zone’s main or thermocouple is disconnected/reconnected the PLC must have a
warm start before the zone can be heated again.
After any setpoint change, the Set Pump Heaters button must be selected.
When disabling or enabling an individual zone, select the disable/enable button and
then select the WarmStart_PLC button
Operating Instructions
Printed: 06 November 2007 09:42 Page 5-41 of 60 Generic (OpAL Plasma) Issue 1: Oct. 07
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