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dunnmechanical
08-07-2010, 01:41 AM
hello every one !! i am new here and searching every where for help !! we have been shipped a new walk in freezer sysystem due to failure of the old compressor , we wanted to go back new with all
we got in a 3 phase tecumseh compressor and single phase 2 fan condensor , with the a419 stat
with no helpfull wiring diagrams !!!
we are strugling trying to get defrost timer , liquad line selinoid , condensor and compressor going
cant find wiring diagrams online
can any one help , with just a basic step by step , please we have been on the roof all day and the noodle is burnt !! just a basic diagram of sequence of where power goes first and so on ???
thanks in advance !!:confused:

mad fridgie
08-07-2010, 03:49 AM
Three phase in to contactor overload compressor.
Take one phase from top of contactor.
Fuse,
One leg Time clock, thermostat, sol valve (if you want pump down)
defrost to defrost contactor
Second leg Thermister, LP, HP, oil diff contactor coil
Fuse Fan speed control, cond fans.
Fuse contactor defrost heaters
Not sure about stat model, is this electronic and is it the defrost timer.
If not then you need defrost termination and fan delay.

dunnmechanical
08-07-2010, 04:07 AM
thanks, does any on have wiring diagram for ava2512-zxtxm and lce694bb also does the larkon coil with electric defrost need its own power source ?? all the power onth old system was provided from the 3 phase box on the roof , kinda confusing us all , thanks for the help!!!