Pool Boiler Temperature Controller: Difference between revisions
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=== LCD Display === | === LCD Display === | ||
An LCD display on the front of the controller indicates the measured temperature of the boiler manifold (top-most value). A graphical bar shows the value relative to the typical minimum and maximum operating | An LCD display on the front of the controller indicates the measured temperature of the boiler manifold (top-most value). A graphical bar shows the value relative to the typical minimum and maximum operating bounds. Temperature thresholds for a [[#Low Temperature Fault|Low Temperature Fault]], [[#Stage 2|Stage 2]] operation, and a [[#High Temperature Fault|High Temperature Fault]] are displayed on the subsequent lines. All temperatures are displayed in degrees Fahrenheit. | ||
The <tt>OP1</tt> and <tt>OP2</tt> indicators (beacons) indicate that [[#Stage 1|Stage 1]] and/or [[#Stage 2|Stage 2]] operation is active, respectively. An <tt>ALM</tt> indicator is associated with a fault condition; user intervention may be required to restore boiler operation. Blinking <tt>H</tt> and/or <tt>J</tt> indicators indicate communication port activity. | The <tt>OP1</tt> and <tt>OP2</tt> indicators (beacons) indicate that [[#Stage 1|Stage 1]] and/or [[#Stage 2|Stage 2]] operation is active, respectively. An <tt>ALM</tt> indicator is associated with a fault condition; user intervention may be required to restore boiler operation. Blinking <tt>H</tt> and/or <tt>J</tt> indicators indicate communication port activity. | ||
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=== Threshold Adjustment === | === Threshold Adjustment === | ||
Threshold adjustment is typically not necessary or recommended. | Threshold adjustment is typically not necessary or recommended. Instead, it is recommended that the system be evaluated for deficiencies. | ||
If a parameter must be adjusted, press the scroll button (left of the down arrow) to move the up/down cursor to the desired parameter. Press the up/down keys to adjust the temperature. Internal bounds limit how high or low a parameter may be adjusted. Use extreme caution in adjusting each parameter, as each could have significant impacts upon boiler operation. | If a parameter must be adjusted, press the scroll button (left of the down arrow) to move the up/down cursor to the desired parameter. Press the up/down keys to adjust the temperature. Internal bounds limit how high or low a parameter may be adjusted. Use extreme caution in adjusting each parameter, as each could have significant impacts upon boiler operation. | ||
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=== Low Operator === | === Low Operator === | ||
The low operator is activated when the following conditions are true: | The low operator is activated (the relay contact is closed) when the following conditions are true: | ||
* The RTD is producing valid feedback (not shorted or open-circuit). | * The RTD is producing valid feedback (not shorted or open-circuit). | ||
* The boiler temperature is below the | * The boiler temperature is below the high temperature fault threshold (timing rules apply). | ||
The low operator may be released when any of the prior conditions are no longer met. In addition, it may be released when: | The low operator may be released when any of the prior conditions are no longer met. In addition, it may be released when: | ||
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=== High Operator === | === High Operator === | ||
The high operator is activated when the following conditions are true: | The high operator is activated (the relay contact is closed) when the following conditions are true: | ||
* All conditions for the low operator are met | * All conditions for the [[#Low Operator|low operator]] are met. | ||
* The boiler temperature is below the second stage threshold (timing rules apply). | * The boiler temperature is below the second stage threshold (timing rules apply). | ||
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|LO | |LO | ||
|Isolated Single Logic Output | |Isolated Single Logic Output | ||
| | |May not be used. | ||
|- | |- | ||
!IO Slot 2 | !IO Slot 2 | ||
|D4 | |D4 | ||
|DC Control | |DC Control | ||
|Will not be used. | |Will not be used; see modifications below. | ||
|- | |- | ||
!IO Slot 3 | !IO Slot 3 | ||
|TK | |TK | ||
|Triple Contact Input | |Triple Contact Input | ||
| | |May not be used. | ||
|- | |- | ||
!H Comms Slot | !H Comms Slot | ||
|PD | |PD | ||
|Profibus with D-type Connector | |Profibus with D-type Connector | ||
|Module is an AH026222U002. | |Module is an AH026222U002 (visually identified). | ||
|- | |- | ||
!J Comms Slot | !J Comms Slot | ||