.. To Remote Temperature Sensor 24 VAC (Hot) Heat 24 VAC Com-mon (optiona l) … for 1F95-1277 Wiring Diagrams for 1F95-1277 Wiring Diagrams … Figure 2 - Single Stage or Multi-Stage System (No … System ORH+ BCLASS II TRANSFORMER HOT 24VAC NEUTRAL 120VAC W/E GC-W2 No Output 24 VAC(Hot) Cool DC supply voltage to re- mote Temp- erature Sensor Remote Temp- erature Sensor signal DC Return to Remote Temp- erature Sensor Y2 YRC S6 L{ To Remote Temperature Sensor 24 VAC(Hot) Heat 24 VAC Com- mon(optiona l) * CLASS II TRANSFORMER 120VAC HOT 24VAC …

Heat Pump Connections If you do not have a heat pump system, refer to figures 2 & 3. Refer to equipment manufacturers’ instructions for specific system wiring information. You can configure the thermostat for use with the following heat pump systems. HEAT PUMP TYPE 1 (HP 1) . Single stage compressor system; gas or electric backup. HEAT PUMP TYPE 2 (HP 2) . Multi-stage compressor or two compressor system with gas or electric backup. After wiring, see INSTALLER CONFIGURATION section for proper thermostat configuration. NOTE: If your system does not provide an E connection, jumper W2 to W/E to use the Auxiliary Heat in the Emergency Mode. * 24 VAC common connection optional for system operation. Required for fault or malfunction indication, remote temperature sensor, or for continuous backlight operation. ** Dual fuel option de-energizes compressor when auxiliary heat is energized. Figure 1 - Heat Pump Systems Single Stage and Multi-Stage Connections Refer to equipment manufacturers’ instructions for specific system wiring information. This thermostat is designed to operate a single-transformer or two- transformer system. You can configure the thermostat for use with the following fossil fuel systems: SINGLE STAGE (SS 1) gas, oil or electric. MULTI-STAGE (MS 2) gas, oil or electric. After wiring, see INSTALLER CONFIGURATION section for proper thermostat configuration. Figure 2 - Single Stage or Multi-Stage System (No Heat Pump) with Single Transformer…

Download 90 Series Blue Universal Thermostat Wiring Diagrams for 1F95-1277.Pdf