Page
25 of 39
Number
SM001-300
HVAC: Idle Management System
c. Continue to operate the recovery station vacuum
pump until the system has pulled a vacuum of
750 – 1000 microns as measured by the elec-
tronic vacuum gauge (15 minutes minimum).
d. Close both hand valves on the recovery station,
and the valve connecting the electronic vacuum
gauge to the recovery station low side line.
10. The A/C system is ready to be charged.
NOTE
The full amount of refrigerant oil has already been
added to the system, DO NOT ADD OIL when charging
the Kenworth EHVAC system.
NOTE
DO NOT disconnect the recovery/recycling/charging
station from the A/C system before charging the sys-
tem.
Q. Charging the Kenworth EHVAC System
WARNING!
Before doing any of the work below, be aware of the
dangers involved. Working with refrigerant could lead
to serious personal injury.
CAUTION
Use only new or clean recycled R-134a refrigerant; not
any of the so called “direct replacement” refrigerants.
Use of equipment dedicated for R-134a is necessary to
reduce the possibility of oil and refrigerant incompatibil-
ity concerns.
CAUTION
When charging the A/C system, the refrigerant tank
must be kept upright. If the tank is not in the upright
position, liquid refrigerant may enter the system and
cause compressor damage.
NOTE
Although your service equipment may appear physi-
cally different from the equipment shown here, the
function of the equipment used to perform each service
procedure is basically the same. If you are performing
these service procedures using service equipment dif-
ferent from that shown, refer to the manufacturer's
instructions supplied with that equipment.
NOTE
If recycled refrigerant is to be used, follow the instruc-
tions supplied with the recycling equipment to purge
the air from the refrigerant before charging the system.
Perform the charging procedure, using new or recycled
refrigerant, only after the following actions have been
completed:
• System components completely installed
• System completely evacuated
CAUTION
If the equipment being used adds system refrigerant oil
during the evacuation/charging procedure, you must
first DISABLE this feature. Follow the instructions fur-
nished with the recovery station, or refrigerant oil injec-
tor tool, to disable this feature.
DO NOT ADD OIL TO THE EHVAC
SYSTEM
The recovery station blue (suction) hose should still be
connected as it was during the evacuation operation.
CAUTION
Due to the density of R-134a, the amount of refrigerant
required to charge a typical air conditioning system has
been reduced. Overcharging the system will result in
excessively high head pressures during operation and
may damage the compressor.
