Thermo King 002008, Manual

Page: 84 / 155

Refrigeration Maintenance
84
Evacuating and Charging
Smart Reefer Multi-Temp
Systems
Set-up Unit
The Smart Reefer Multi-Temp µP-IV
microprocessor must be placed in the Evacuation
Mode to evacuate and charge the unit. When the
microprocessor is in the Evacuation mode it opens
all the solenoid valves in the refrigeration system.
This allows the refrigeration system to be
evacuated properly. Refer to the appropriate
Diagnosis Manual for complete information about
the microprocessor. Use the following procedure
to set-up the unit and the place the microprocessor
in the Evacuation mode:
1. Connect a battery charger to the unit battery.
The battery charge must have an output of at
least 15 amperes. This will maintain the
charge level of the battery during the time
required to evacuate and the charge the unit.
The microprocessor's Service Test mode is
used to open unit valves as required for
evacuation. Failure to connect a battery
charger may result in the battery voltage
falling too low to reliably operate the
microprocessor and valves.
2. Use the CYCLE-SENTRY Selection screen to
select Continuous Run operation if
Continuous Run operation is not already
selected.
3. Place the Zone 1/Host On/Off switch in the
Off position.
4. Place the Zone 1/Host, Zone 2, and Zone 3
On/Off switches in the On position.
5. Clear any alarm codes using the
C
ODE
and
C
LEAR
keys.
6. With the standard screen on the display and
before the engine starts, press the TK key and
hold it down (for 3 to 5 seconds) until [PrE]
[TRIP] appears on the display.
7. Press the
S
ELECT
key. If [OFF] and [PRNT]
appear on the display, press the S
ELECT
key
again. The letters [REV] should appear in the
lower display and the revision number should
appear in the upper display.
8. With the revision screen on the display, press
both the TK key and the C
LEAR
key and hold
them down (for 3 to 5 seconds) until [TEST]
and [VAC] appears on the display.
9. Press the
E
NTER
key to load the Evacuation
mode [VAC]. All normally closed valves will
be energized.
The display should show [TEST] and [VAC].
If the display shows [SET] and [VAC], a
higher rate of battery charge is required.
Alarm Code 109 will be generated. This is
normal.
10. The microprocessor is now in the Evacuation
mode. The refrigeration system is set-up for
evacuation and charging.
Evacuating the System
1. Be sure all refrigerant has been recovered
from the unit.
2. Connect a vacuum pump and gauge manifold
for 3 point evacuation to the suction service
valve, discharge service valve, and receiver
tank outlet valve.
NOTE: The use of the Thermo King
Evacuation Station P/N 204-725 or 204-744
is recommended.
3. Verify proper operation of the Evacuation
Station as shown in the Evacuation Station
Operation Manual TK 40612.
4. Start the evacuation pump and mid-seat the
suction service valve, discharge service valve,
and receiver tank outlet valves.
5. Install service valve stem caps with seals and
tighten them. The valve stems should remain
capped while evacuating the unit.
6. Evacuate the unit to 500 microns.
7. Continue to evacuate the unit for one
additional hour after reaching 500 microns.
This insures complete evacuation of the
remote evaporators and lines.
8. Close the Evacuation Station valve nearest the
vacuum pump (V1) to isolate the vacuum
pump from the system. Turn the vacuum
pump off.