8 RT-SVX23D-EN
General Information
restart tyhe compressor. On dual compressor units only the affected compressor circuit is locked
out.
High Pressure Control (Optional — Standard on R-410A models)
The high pressure controls are wired in series between the compressor outputs on the RTRM and
the compressor contactor coils. If the high pressure control switch opens, the RTRM senses a lack
of current while calling for cooling and locks the compressor out.
If four consecutive open conditions occur during an active call for cooling, the compressor will be
locked out, a diganostic communicated to ICS™, if applicable, and a manual reset required to
restart tyhe compressor. On dual compressor units only the affected compressor circuit is locked
out.
Power Exhaust Control (Optional)
The power exhaust fan is started whenever the position of the economizer dampers meets or
exceed the power exhaust setpoint when the indoor fan is on.
The setpoint panel is located in the return air section and is factory set at 25%.
Lead/Lag Control (Dual Circuit Only)
Lead/Lag is a selectable input located on the RTRM. The RTRM is configured from the factory with
the Lead/Lag control disabled. To activate the Lead/Lag function, simply cut the wire connected to
J3-8 at the RTRM. When it is activated, each time the designated lead compressor is shut off due
to the load being satisfied, the lead compressor or refrigeration circuit switches. When the RTRM
is powered up, i.e. after a power failure, the control will default to the number one circuit
compressor.
Zone Sensor Module (ZSM) (BAYSENS107*)
This electronic sensor features three system switch settings ( Heat, Cool, and Off) and two fan
settings (On and Auto). It is a manual changeover control with single setpoint. (Cooling Setpoint
Only)
Zone Sensor Module (ZSM) (BAYSENS109*)
This electronic sensor features four system switch settings (Heat, Cool, Auto, and Off) and two fan
settings (On and Auto). It is a manual or auto changeover control with dual setpoint capability. It
can be used with a remote zone temperature sensor BAYSENS077*.
Programmable Zone Sensor - BAYSENS119*
This 7 day programmable sensor features 2, 3 or 4 periods for Occupied or Unoccupied
programming per day. If the power is interrupted, the program is retained in permanent memory.
If power is off for an extended period of time, only the clock and day may have to be reset.
The Zone Sensor allows selection of 2, 3 or 4 system modes (Heat, Cool, Auto, and Off), two fan
modes (On and Auto). It has dual temperature selection with programmable start time capability.
The occupied cooling set point ranges between 45 and 98 degrees Fahrenheit. The heating set point
ranges between 43 and 96 degrees Fahrenheit.
A liquid crystal display (LCD) displays zone temperature, temperature set points, day of the week,
time, and operational mode symbols.
The Option Menu is used to enable or disable applicable functions, i.e.; Morning Warm-up,
Economizer minimum position override during unoccupied status, Fahrenheit or Centigrade,
Supply air tempering, Remote zone temperature sensor, 12/24 hour time display, Smart fan, and
Computed recovery.
During an occupied period, an auxiliary relay rated for 1.25 amps @ 30 volts AC with one set of
single pole double throw contacts is activated. Electronic Timeclock (BAYCLCK001A).
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