Air Evacuation; Preparations And Precautions; Before Performing Evacuation; Evacuation Instructions - Bosch Climate 5000 Installation Manual

22 Air Evacuation

7. Air Evacuation
7.1.

Preparations and Precautions

Air and foreign matter in the refrigerant circuit can cause abnormal rises
in pressure, which can damage the air conditioner, reduce its efficiency,
and cause injury. Use a vacuum pump and manifold gauge to evacuate
the refrigerant circuit, removing any non-condensable gas and moisture
from the system.
Vacuum the system should be performed upon initial installation and
when unit is relocated.

7.1.1. Before performing Evacuation

Check to make sure that both high-pressure and low-pressure pipes
•
between the indoor and outdoor units are connected properly in
accordance with the Refrigerant Piping Connection section of this
manual.
Check to make sure all wiring is connected properly.
•
Bosch Climate 5000
7.2.

Evacuation Instructions

Before using the manifold gauge and vacuum pump, read their operation
manuals to familiarise yourself with how to use them properly.
Compound gauge
-76cmHg
Low pressure valve
Pressure hose /Charge hose
Low pressure valve
1 Connect the charge hose of the manifold gauge to service port on
the outdoor unit's low pressure valve.
2 Connect another charge hose from the manifold gauge to the
vacuum pump.
3 Open the Low Pressure side of the manifold gauge. Keep the High
Pressure side closed.
4 Turn on the vacuum pump to evacuate the system.
5 Run the vacuum for at least 15 minutes, or until the Compound
Meter reads -76cmHG (-105Pa). 1.5 Torr.
6 Close the Low Pressure side of the manifold gauge, and turn off the
vacuum pump.
7 Wait for 5 minutes, then check that there has been no change in
system pressure. Disconnect Vacuum Machine before opening
service valves.
Manifold Gauge
Pressure gauge
High pressure valve
Charge hose
Vacuum pump
Figure 7-1
6 720 866 139 (2016/07)