are you moving it from another location to this one ? it is an obsolete model, but that doesn't mean it can't be used. i'm just curious about the situation. what exactly is the application ?
if the fan signal is separated out and gh (fan for heat) is jumpered to r, that may have been the configuration for the previous application it was used for. there may have been multiple transformers involved. not sure. i'm sure we can direct you to some resources. hopefully someone here is familiar with the model.
Problems related to residential installations.
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