Fairway Farms Swim Club

Pool Boiler: Difference between revisions

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Two copies of the CSD-1 should be kept by FFSC.  One placed in a room near the boiler, another in a central filing location.
Two copies of the CSD-1 should be kept by FFSC.  One placed in a room near the boiler, another in a central filing location.
== Known Issues ==
=== Low-Water Cut-Off ===
The implementation of the low-water cut-off (LWCO) could potentially be improved.  In the present design (as found in 2020, where the control transformer is cut off):
* The pump could theoretically continue to operate following a low-water trip per time delay relay TD4.
* The loss of control power prevents detection of a low-water condition by the PLC; the PLC does not even "see" a demand for heat when the cut-off is tripped.
Options to consider:
* The T7CS5D-24 relay in the LWCO is rated for a 12 A load at 120 VAC.  Move T1 (C1 pin #4) from terminal 1 to the output of the LWCO.  This would serve to immediately disconnect the pump upon low-water trip.
* Reconnect the control transformer to terminal 3 (per RBI drawings).  Disconnect the LWCO relay contacts and remove the factory jumper from H to C (to confirm).  Insert the LWCO contact between terminals 17 and 18 in the boiler (remove jumper "F" per RBI drawings).
=== Power Switch ===
The power switch does not disconnect the control transformer.  This is fixed by reconnecting the control transformer to terminal 3 (as suggested above).


== Troubleshooting ==
== Troubleshooting ==
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* Relay coil taps were added to add monitoring of operating conditions by an external PLC.  These connections are documented in the pool systems automation [[:File:FFSC-001_Pg_40_-_Boiler_Auxiliary.png|Boiler Auxiliary]] drawing.
* Relay coil taps were added to add monitoring of operating conditions by an external PLC.  These connections are documented in the pool systems automation [[:File:FFSC-001_Pg_40_-_Boiler_Auxiliary.png|Boiler Auxiliary]] drawing.
* Re-routing of some electrical in new liquid-tight conduit.
* Re-routing of some electrical in new liquid-tight conduit.
== Known Issues ==
=== Low-Water Cut-Off ===
The implementation of the low-water cut-off (LWCO) could potentially be improved.  In the present design (as found in 2020, where the control transformer is cut off):
* The pump could theoretically continue to operate following a low-water trip per time delay relay TD4.
* The loss of control power prevents detection of a low-water condition by the PLC; the PLC does not even "see" a demand for heat when the cut-off is tripped.
Options to consider:
* The T7CS5D-24 relay in the LWCO is rated for a 12 A load at 120 VAC.  Move T1 (C1 pin #4) from terminal 1 to the output of the LWCO.  This would serve to immediately disconnect the pump upon low-water trip.
* Reconnect the control transformer to terminal 3 (per RBI drawings).  Disconnect the LWCO relay contacts and remove the factory jumper from H to C (to confirm).  Insert the LWCO contact between terminals 17 and 18 in the boiler (remove jumper "F" per RBI drawings).
=== Power Switch ===
The power switch does not disconnect the control transformer.  This is fixed by reconnecting the control transformer to terminal 3 (as suggested above).
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