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INSTALLATION MANUAL VIVE. COMFORT TP-N-751 PTAC DIRECT SALES, Inc. 185 South Kimball Ave., Suite 130 Southlake, TX 76092 Toll-Free: 877.454.7822 Web: www.PTACdirect.com Power Type Thermostat Applications Guide Battery Power Description Hardwire (Common Wire) Gas or Oil Heat Electric Furnace Hardwire (Common Wire) with Battery Backup Heat Pump (No Aux.