84
TK 61555-2-MM-EN
5.
Operate the unit on cool and pump down the low side to 20 in. Hg (-0.68 bar)of vacuum.
6.
Stop the unit. The condenser and suction pressures should remain stable, indicating no
leaks.
7.
Shift the three-way valve to the heat position. The low side gauge will raise slightly. The high
side gauge will drop to approximately zero. The gauges will equalize.
8.
The gauges will remain in this position, approximately zero, if the three-way valve seals
properly toward the condenser and the condenser pressure bypass check valve seals
properly.
9.
Back seat condenser pressure bypass check valve stem against the snap ring. Both gauges
should rise indicating the condenser pressure bypass check valve is properly releasing
condenser pressure into the discharge tube and evaporator.
10. Replace the cap on the condenser pressure bypass check valve.
N
No
otte
e:: Valve stem MUST be back seated during normal unit operation.
11. Open the receiver tank return outlet valve, remove the gauges and return the unit to normal
operation.
