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Taco SR504 - EXP - master and slave question

Steve_75
Steve_75 Member Posts: 20
in THE MAIN WALL
I have two Taco SR 504(6)-EXP switching relays, one 4 zone and one 6. They are about 20 feet apart from each other. I have run a wire between the 1,2,3,4 terminals of each relay and switched one to master and one to slave as in the instructions. Each relay has a seperate power supply.

The slave relay is not functioning as it should - the circulators will not come on unless I switch it out of slave and the burner (cold start) does not come on when a t-stat calls for heat. The first relay seems to be fine except it did blow the 1 amp fuse at one point.

The instructions are not that good with no trouble shooting and they have nothing on-line. Any thoughts?

Comments

  • jim lockard
    jim lockard Member Posts: 1,059
    Taco Joe

    Steve-Try doing a search for "Taco" Joe M. is a tech with taco and posts here. Best Wishes J.Lockard
  • REF
    REF Member Posts: 61
    Fuse

    When the fuse popped was it from the slave board? Maybe a wire crossed by accident. This could mean the slave is done for. Double check your schematic. I have had my share of scorchers. I would agree to contact Taco tech. service. The local suppliers usually have that number. If you can't find it. Email me and I'll track it for you.

    Respectfully,
    REF
  • Steve_75
    Steve_75 Member Posts: 20


    The fuse was on the master and it seems to work fine with a new fuse. There was also a relay for the end switch which was buzzing quite a bit in the "normal" mode that went away when I put it into "reset". The issue with reset was that the cir would not come on in a call for heat. This issue also seems to have stoped.

    I should point out that both controls did and do work fine standalone, it is only when I tied them together that the issues started. All you do to tie them together is to run 4 wires from one to the other into learly marked terminals. I have checked these closely to be sure I didn't have any wires touching and that they were in the right place. I did use CAT 5 wire which is 24 gage and the secmatic called for 18-22 gage. I did double up on the CAT5 as it comes with 4 strands of two wires each.

    How do I reach the Taco rep? Thanks for all of your help.
    Steve
  • Dick Carlson
    Dick Carlson Member Posts: 13
    phase

    Makr sure they are on the same phase of line voltage. It kicked my butt once.
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