General Information
RT-SVX059D-EN 7
Drain Pan Condensate Overflow Switch
(Optional)
This input incorporates the Condensate Overflow Switch
(COF) mounted on the drain pan. When the condensate
level reaches the trip point, the COF relay energizes and
opens the 24VAC control circuit, disabling the unit. A delay
timer prevents the unit from starting for 3 minutes.
Phase Monitor
The Phase Monitor is a three-phase line monitor module
that protects against phase loss, phase reversal and phase
unbalance. It is intended to protect compressors from
reverse rotation. It has an operating input voltage range of
190–600
Vac, and LED indicators for ON and FAULT. There
are no field adjustments and the module will automatically
reset from a fault condition.
Discharge Line Thermostat Control
The high pressure controls and the discharge line
thermostat signals are wired in series and connected to
the safety input of the LSD. The compressor contactor coil
is connected to the ‘CC’ terminal of the LSD. If the high
pressure control switch or the discharge line thermostat is
open, the 24VAC signal to the SI input of the LSD is
interrupted and the compressor contactor coil supply is
disabled by the LSD. It has an automatic lockout.
Locking Safety Device with Anti-Short
Cycle Timer
This device monitors compressor safety switch trips to
prevent short cycling, protecting the compressor. A
manual reset is required after a fourth safety switch trip
within a 6 hour period.
Sensors
High Temperature Sensor (BAYFRST003*)
This sensor connects to the Emergency Stop Input on the
LTB and provides high limit “shutdown” of the unit. The
sensor is used to detect high temperatures due to fire in
the air conditioning or ventilation ducts. The sensor is
designed to mount directly to the sheet metal duct. Each
kit contains two sensors. The return air duct sensor
(X1310004001) is set to open at 135°F.
The supply air duct sensor (X1310004002) is set to open at
240°F. The control can be reset after the temperature has
been lowered approximately 25°F below the cutout
setpoint.
Thermostat (TCONT802AS32DA)
This thermostat is a multi-stage 3 heat/2 cool, auto-
changeover digital display thermostat. It is a
programmable thermostat, and a 7-day programmable
stat with night setback shall be available. In addition, it is
wall mounted.
Thermostat (TCONT402AN32DA)
This thermostat is a multi-stage 3 heat/2 cool, auto
changeover digital display thermostat. It is a non-
programmable, wall-mounted thermostat, and it can be
used for economizer operation.
Occupancy Sensor
A customer-supplied occupancy sensor can also be added
to provide damper control based on occupied/unoccupied
conditions.
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