TK 56430-18-IP-EN
101
10. Inspect the sight glass.
•
NO BUBBLES PRESENT: The system is full of refrigerant. Proceed to Step 11.
•
BUBBLES PRESENT: The system is low on refrigerant. Proceed to the .
•
Verify the unit is not over charged. Elevate engine RPM to 3000-4000 RPM for three minutes. Verify that the unit
does not shutdown on high head pressure. If unit shuts down on high head pressure the system is overcharged.
Reduce the refrigerant charge amount until the unit no longer shuts down on high head pressure.
N
No
otte
e:: If the condenser coil was covered in previous Step 9 leave the condenser coil covered for Step 11.
11. Turn off the unit and shut off the vehicle’s engine. Remove the gauge manifold(s) and refrigerant bottle.
Refrigerant charging is complete.
Suction (Low Side) Bump Charging
IIm
mp
po
orrtta
an
ntt:: Failure to properly charge the system with refrigerant will result in immediate damage to the compressor.
1. Connect the gauge manifold set to the liquid port on the refrigerant bottle and purge the gauge manifold set (if not
already completed in the previous procedure).
2. Connect the gauge manifold set blue hose (Low Side) to a Suction (Low Side) service port (if not already completed
in the previous procedure).
N
No
otte
e:: Select a service port that is as far away from the roadside compressor as possible. Do NOT connect the
Suction (Low Side) hose to the Suction service port at the roadside compressor. Compressor damage may
occur.
3. Connect the gauge manifold set red hose (High Side) to a Discharge (High Side) service port (if not already
completed in the previous procedure).
4. Start the vehicle’s engine and operate it at 1000 RPM.
5. Turn the unit “ON” and place the unit in “Cool” Mode. Lower the set point to the following:
•
R-134a: 25 degrees F (-4 degrees C)
•
R-404A/R-452A: 0 degrees F (-18 degrees C)
6. Operate the unit until the following box temperature is reached:
•
R-134a: 35 degrees F (2 degrees C)
•
R-404A/R-452A: 10 degrees F (-12 degrees C)
7. Check to verify the following discharge pressures are met or exceeded:
•
R-134a: 180 psig (12.5 bar)
•
R-404A/R-452A: 275 psi (19 bar)
N
No
otte
e:: Partially blocking the condenser coil may be necessary to achieve these pressures.
8. Open the Low Side valve on the gauge manifold set for O
ON
NE
E S
SE
EC
CO
ON
ND
D and close.
9. Wait a minimum of ten seconds. Inspect the sight glass for bubbles.
•
NO BUBBLES PRESENT: The system is full of refrigerant. Proceed to Step 10.
•
BUBBLES PRESENT: The system is low on refrigerant. Repeat Steps 8 and 9 until no bubbles are present in the
sight glass.
10. Close the gauge manifold valves and refrigerant bottle valve. Turn off the unit and shut off the vehicle’s engine.
Refrigerant charging is complete.
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