Instruction manual

3
INTRODUCTION
Bryant’s 7-- day, 5/2--day, 1 --day programmable and non-- programmable
Preferredt Series Thermidistatt Control is a wall-- mounted, low--voltage
control which combines temperature and humidity control in either a single unit
or a two--piece unit. In two--piece configuration, the relays are located near the
equipment and a two-- wire connection is used between the Display Module and
the Equipment Control Module. Single--piece installation requires more wiring
and results in a higher profile. An extension of Bryant’s proven line of
thermostats; it provides separate setpoints for heating and cooling in addition to
humidification and dehumidification.
Different heating and cooling setpoints and times are programmable for 4
periods per day or 2 periods per day. Programming can be done for 7 days per
week, 5/2 days per week, or 1 day. The Thermidistat Control can also be user
configured as a non -- programmable thermostat.
When operating in the non--programmable configuration it will still have both
temperature and humidity control. Batteries are not used. During power loss an
internal memory stores programs and settings for unlimited time, and the clock
continues to run for at least 24 hours.
INSTALLATION CONSIDERATIONS
Power
This control is powered by 24VAC only. It requires 24VAC (Rh and/or Rc and C
terminals) of the low--voltage transformer to be connected to it for proper
operation. It will not operate without these 2 connections. Rh and Rc are
connected via PCB breakout jumper. See Fig. 1. For applications using two
24VAC transformers, one in the indoor unit and one in the outdoor unit, connect
the common from each to the C terminal. Connect R from the indoor unit to the