Exhaust Circuit Pressure Check; Exhaust Circuit Vacuum Check - Trane PRGD series Installation, Operation And Maintenance Manual

T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
you can observe and confirm that the pump-out
compressor starts and the exhaust solenoid opens.
After 5 seconds, you should also be able to observe the
pump-out solenoid opening.

Exhaust Circuit Pressure Check

The Exhaust Circuit Pressure Check enables the
servicing technician to check the exhaust circuit
components and lines for leakage by pressurizing the
exhaust circuit.
N N o o t t e e : : This test can be initiated from only the Tracer ®
TU service tool.
To perform this test, follow this procedure:
1. Install a pressure gauge, isolation valve, pressure
regulator, and a source of dry compressed air or
nitrogen to the line downstream of the exhaust
solenoid valve. When this check is enabled, the
exhaust solenoid opens.
2. Pressurize the exhaust circuit to no more than
10 psi (68.9 kPa) using dry air or nitrogen.
3. After the target pressure is achieved, isolate the
pressure source and monitor the pressure gauge
for decay. A loss of pressure indicates leakage from
the exhaust system.
4. Test the exhaust components and line connections
for leaks by using a soap solution.
5. Relieve the testing pressure from the exhaust circuit
before disabling this test. When the test is disabled
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the exhaust solenoid valve re-closes.

Exhaust Circuit Vacuum Check

The Exhaust Circuit Vacuum Check enables the
servicing technician to check the exhaust circuit
components and lines for leakage by placing a vacuum
on the exhaust circuit.
N N o o t t e e : : This test can be initiated from only the Tracer ®
TU service tool.
To perform this test, the servicing technician should
follow this procedure:
1. Install a vacuum gauge, isolation valve, and a
vacuum source to the line downstream of the
exhaust solenoid valve. When this check is enabled,
the exhaust solenoid opens.
2. Turn on the vacuum source and pull the exhaust
circuit to as deep a vacuum as can be achieved.
3. After a vacuum is achieved, isolate the vacuum
source and monitor the vacuum gauge for decay. A
rise in pressure indicates leakage into the exhaust
system.
N N o o t t e e : : Out-gassing of refrigerant from the carbon
tank may give a false indication of a pressure
rise.
4. Relieve the vacuum from the exhaust circuit before
disabling this test. When the test is disabled the
exhaust solenoid valve re-closes.
PRGD-SVX01F-EN