Thermo King 914970, Руководство пользователя

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Unit Description
24
Refer to the Operating Instructions for detailed
description of the controller functions.
Operating Modes
The RD-II MAX uses a ThermoGUARD V
microprocessor controller for operational control
of the unit.
Engine Operation
Continuous Run Operation
When the unit is started with the box temperature
higher than 3.4 F (1.9 C) above the thermostat
setpoint, the unit will run on High Speed Cool.
When the temperature drops to 3.4 F (1.9 C)
above setpoint, the thermostat de-energizes the
High Speed engine solenoid circuit, placing the
unit on Low Speed Cool.
When the box temperature reaches the thermostat
setpoint, the pilot solenoid is energized. The
three-way valve shifts to the Heat position,
placing the unit on Low Speed Heat.
If the temperature continues to fall, the thermostat
will shift the unit to High Speed Heat at 3.4 F
(1.9 C) below setpoint. The unit will remain on
High Speed Heat until the box temperature rises
to 1.7 F (0.9 C) below setpoint.
If the temperature continues to rise to 1.7 F
(0.9 C) above setpoint, the thermostat
de-energizes the pilot solenoid. The three-way
valve shifts back to the Cool position, placing the
unit on Low Speed Cool.
If the temperature continues to rise to 5.1 F
(2.9 C) above setpoint, the thermostat will
energize the engine solenoid high speed circuit,
placing the unit on High Speed Cool.
CYCLE-SENTRY Operation (Optional)
With the Auto Start/Stop-Continuous Run switch
in the Auto Start/Stop position, the
CYCLE-SENTRY system starts the unit on
thermostat demand and shuts down the unit when
the box temperature reaches the thermostat
setpoint.
On CYCLE-SENTRY equipped units, unit
start-ups may also be initiated by Defrost cycle
initiation or engine block temperature thermostat
demand. In cold ambients, the CYCLE-SENTRY
system demand automatically maintains engine
temperature by restarting the unit if the engine
block temperature drops to 30.0 F (0 C). When the
unit starts because of low engine block
temperature, it will run in the operating mode
called for by the unit thermostat until the battery
is fully charged and the engine block temperature
reaches 90.0 F (32.2 C)
After the unit starts, a Battery Sentry module
monitors the voltage across the field of the
alternator and will keep the unit running if the
battery is not sufficiently recharging. The
ThermoGUARD thermostat controls unit
operating mode to maintain the box temperature
thermostat setpoint. The unit runs in whichever
operating mode the thermostat is calling for to
properly maintain the box temperature.
Electric Operation (Model 50 Units)
When the unit switch is turned On with the box
temperature higher than 3.4 F (1.9 C) above
thermostat setpoint, the unit will run on Cool.
When the temperature drops to setpoint, the
thermostat de-energizes the electric motor
contactor, placing the unit on Null.
If the box temperature continues to fall, the
thermostat energizes both the electric motor
contactor and the heat contactor (optional) to
place the unit on Heat at 3.4 F (1.9 C) below
setpoint. The unit will remain on Heat until the
box temperature rises to 1.7 F (0.9 C) below
setpoint. The thermostat will then de-energize the
electric motor contactor and optional heat
contactor, placing the unit on Null.
If the temperature continues to rise to 5.1 F
(2.9 C) above setpoint, the thermostat will
energize the electric motor contactor, placing the
unit on Cool.
WARNING: With the selector switch in
the Auto Start/Stop position and unit
On/Off switch in the On position, the unit
may start at any time without prior
warning.