SyncroFlo Technical Bulletin

 

TO:                                 All Representatives

 

FROM: Service Department

 

DATE:                           December 3, 2007

 

SUBJECT:                    Troubleshooting Temperature Probes and Purge Valves.

 

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There are several reasons water can come from the purge lines on the station. Here are a few simple checks that can narrow down the problem.:

 

1. Is the pump casing hot to the touch?

     

    A. Yes - The probe is hot and the pump is purging as it should. Check to see if there is a problem

                   pump cycling. On systems where the lead pump does not shut down, purging is the only

                   means to protect the pump during low or no flow conditions. On systems with a hydrocumulator tank, purging could indicate improper operation.

 

   B. No - Go to step 2.

 

2. Check all the purge valve solenoid coils. See if one is energized by either feeling if it is warm,

    or using a voltmeter at the output terminals in the control panel. Is one energized?

 

    A. Yes – Verify the wiring to the temperature probe. If correct, replace temperature probe.

 

    B. No - Purge valve may be stuck open by debris. Activate the purge valve for 15 to 20 seconds

                 by placing a jumper across the temperature probe input terminals in the control panel. If

                 water stops coming from the line no further action is required. If water continues from

                 the purge line the purge valve needs to be cleaned or replaced.