Thermo King 098916, Maintenance Manual

Page: 120 / 196

Electrical Maintenance
119
High Pressure Cutout Manifold
1. Connect the manifold gauge to the compressor
discharge service valve with a heavy duty,
black jacketed thick wall #HCA 144 hose with
6024 kPa, 60.24 bar, 900 psig working
pressure rating.
2. Operate the unit in Cool by performing a
Capacity 100 percent test from the Manual
Function Test menu of the controller.
3. Raise the discharge pressure of the
compressor by blocking the condenser coil
airflow. Temporarily cover the compressor
compartment, control box and power cord
storage compartment with cardboard to reduce
condenser coil airflow. This should increase
the discharge pressure enough to cause the
switch to open. When the switch opens:
• The compressor should stop immediately.
NOTE: The discharge pressure should never
be allowed to exceed 3,447 kPa, 34.4 bar, 500
psig.
4. Be sure to remove the cardboard installed in
step 3.
If the HPCO switch fails to stop compressor
operation, replace the switch and repeat steps 1
through 4.
1. Relief Valve
2. O-ring
3. Adapter Tee (Weather Head)
Figure 65: High Pressure Cutout Manifold
AXA0174