Accustat Nonadjustable Sensors, Digital Line Voltage Energy Control, Multistage Thermostats, Adjustable Thermostat with Built-in Limiter. Help others learn more about this product by uploading a video! Upload video. Customer questions & answers. PSG Controls has been providing the thermostats you need for more than 30 years the following chart to help cross over from the ACCUSTAT Original modelsView and Download PSG FP700 owner's instructions manual online. FP700 thermostat pdf manual download. Manufactured by the makers of ACCUSTAT® controls. Pull thermostat cable through h*** in wall or outlet box. 4. Plug wall h*** to prevent drafts which may affect the thermostat. 5. Mount ACCUSTAT control to PSG Controls, Inc. (Please refer to owner's manual for programming instructions). APPLICATION: This thermostat is a programmable 24 volt Heating and Cooling. 1 CL. 1 HT. 1 CL/1 HT. 1. 1. 2. ACCUSTAT® limiters are used in conjunction with an existing thermostat to control the range of temperature adjustment permitted,