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Baystat040a installers guide

Installer's Guide Customer Property Contains wiring and service information Please retain Library Product Section Product Model Literature Type Sequence Date File No Supersedes THER-IN- -HD D Service Literature Unitary Unitary Accessories T ? stat Panels Timers Relays Installer's Guide February SV-UN-ACC- THER-IN- New Models BAYSTAT A ASYSTAT A Used With T Y W thru YC TC WC thru TC TE YC D or H Thru Ton MICROELECTRONIC CONVENTIONAL OR HEAT PUMP THERMOSTAT Application The Thermostat provides electronic control of VAC commercial single zone heating ventilating and air conditioning HVAC equipment When used with a BAYBASE A or BAYBASE A subbase the thermostat is automatically con ?gured for conventional heat cool applications When used with a BAYBASE A subbase the thermostat is automatically con ?gured for heat pump applications The BAYSTAT A and ASYSTAT A are also ?eld con ?gurable for automatic or manual changeover between heating and cooling The system selections are made by keyboard entry All thermostats require a common wire to VAC supply power RECYCLING NOTICE If this control is replacing a control that contains mercury in a sealed tube do not place your old control in the trash Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat Installation When Installing this thermostat Read these instructions carefully Failure to follow them could damage the thermostat or cause a hazardous condition Check the ratings given in the instructions and on the thermostat to make sure the thermostat is suitable for your application The installer must be a trained experienced service technician After installation is complete check out thermostat operation as provided in these instructions Mounting Thermostat on Subbase The thermostat mounts on the subbase after it is installed Engage tabs at the top of the thermostat and subbase See Figure Press lower edge of case to latch Note To remove the thermostat from the wall ?rst pull out at the bottom of the thermostat then remove the top Figure - Mounting the thermostat on the subbase ? American Standard Inc CSettings Using Thermostat Keys The thermostat keys are used to - set the current time and day - program times and setpoints for heating and cooling - override the program temperatures - display present setting - set system and fan operation - con ?gure Installer Setup - check Installer Self-Test See Figure for key information Figure - Thermostat key locations and descriptions Installation Setting the System and Fan select models The system default setting is Heat The fan default is set so the fan operates with the heating or cooling equipment in Occupied and Unoccupied mode Use the System and Fan keys to change the settings The system settings are Em Heat BAYBASE A Emergency heat relay is on continuously Thermostat cycles highest stage of heat Cooling system is o ? Compressor is de-energized Heat Thermostat controls the heating O ? Both heating and cooling are o ? Cool Thermostat controls the cooling Auto Thermostat automatically changes between heating and