3-6
Starting the Unit
Operating Instructions
CRR-20 & CRR-40, September 1999
Starting the Unit and Adjusting the
Controller Setpoint
CAUTION: Supply power connections from the unit
to the power source must always be made with the
refrigeration Unit On/Off switch and power supply
On/Off switch in the OFF positions. Never attempt to
start or stop the refrigeration unit with the unit power
cable.
1.
Connect the unit power cord to proper power source:
• 460/380V power cord to 460/380V, 60-50 Hz power
source.
• For operation on 230/190V power, insert the 460/380V
power plug into the dual voltage transformer receptacle.
Then connect the 230/190V power cord to a 230/190V,
60-50 Hz power source.
• Turn the power supply On/Off switch ON.
2.
Turn the unit On/Off switch to ON position. Check for
condenser fan and evaporator fan motor operation (see
“Condenser Fan and Evaporator Fan Rotation” in the
Electrical Maintenance chapter of this manual). If the unit
was properly pretripped, correct condenser fan rotation
will also indicate correct evaporator fan rotation.
3.
Adjust controller setpoint to the desired temperature:
• Press the UP or DOWN arrow key to increase or
decrease the setpoint. The left display flashes “SETPT”
while the right display shows the temperature.
• Wait four seconds for all three digits to appear on the
right display. Make additional setpoint adjustment if
necessary.
• Press the ENTER key when the desired setpoint shows
in the right display. The right display briefly shows
LOAD”. The controller then returns to the Standard
Display (showing new setpoint).
NOTE: If the ENTER key is not pressed within 10
seconds, the controller will default (return) to the
previous setpoint. If this occurs, repeat step 3.
Loading Procedure
1.
Make sure the Unit On/Off switch is OFF before opening
the container doors. (The unit may be operating when
loading the container from a warehouse with door seals.)
2.
Spot check and record load temperature while loading.
Especially note any off-temperature product.
Post Load Procedure
1.
Make sure all doors are closed and locked.
2.
Start unit if unit is OFF.
3.
Check controller setpoint for proper setting.
4.
If trip ID information has NOT been entered in the con-
troller, enter it now using the PC-PAC™ software (see
instructions of PC-PAC™ software).
5.
One-half hour after loading, initiate a manual defrost
cycle:
• Press the DEFROST key. The display flashes “ENTER
DFRST”.
• Press the ENTER key. “LOAD DFRST” briefly appears
in the display. The Defrost LED turns ON as the unit
enters Defrost. The controller then returns to the
Standard Display. Defrost will stop automatically.
NOTE: The evaporator coil temperature must be
below 10 C (50 F) to allow the unit to enter a
defrost cycle. If the evaporator coil temperature
is too high, the controller display will show
“DFRST INVAL” (defrost invalid) for 3 seconds.
The controller then returns to the Standard
Display.
Post Trip Procedure
Trip data recorded by the Thermoguard
®
µ
P-D controller may
be down loaded using PC-PAC™ software via the communi-
cations connection located on the bottom of the control box.
See instructions in PC-PAC™ software manual, TK P/N 204-
988.
Содержание CRR-20
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