Maintenance And Disassembly; Maintenance; First Time Installation Check - Bosch CLIMATE 5000 Service Manual

Maintenance and Disassembly

4 Maintenance and Disassembly
4.1

Maintenance

4.1.1

First Time Installation Check

Air and moisture trapped in the refrigerant system affects the
performance of the air conditioner by:
• Increasing pressure in the system.
• Increasing the operating current.
• Decreasing the cooling or heating efficiency.
• Blocking the capillary tubing due to ice build-up in the refrigerant
circuit.
• Corroding the refrigerant system.
Air purging with vacuum pump
Low pressure gauge
Vacuum
pump
Vacuum
pump
Fig. 5.
Procedure:
1. Tighten the flare nuts of the indoor and outdoor units, and confirm
that both liquid / gas valves are closed.
2. Connect the charge hose with the push pin of Handle Lo to the
service port on gas valve.
3. Connect another charge hose to the vacuum pump.
4. Fully open the Handle Lo manifold valve.
5. Using the vacuum pump, evacuate the system for 30 minutes.
a. Check whether the vacuum pressure gauge indicates -1 bar
(-14.5 Psi).
14
(Liquid side)
(Indoor unit)
(Gas side)
Manifold
-0.1MPa
Handle Lo
Charge hose
Charge hose
To prevent air and moisture from affecting the air conditioner's
performance, the indoor unit, as well as the pipes between the indoor
and outdoor unit, must be leak tested and evacuated.
Leak test
An electronic refrigerant leak detector can be used for leak test. As an
alternative, soap water method can be also used.
Use a soft brush to apply soapy water or a neutral liquid detergent onto
the indoor unit connections and outdoor unit connections. If there is gas
leakage, bubbles will form on the connection.
Liquid valve
Gas valve / Service port
High
pressure
gauge
Handle Hi
• If the vacuum pressure gauge does not indicate -1 bar
(-14.5 Psi) after 30 minutes, continue evacuating for an
additional 20 minutes.
• If the pressure does not achieve -1 bar (-14.5 Psi) after
50 minutes, check for leakage.
• If the pressure successfully reaches -1 bar (-14.5 Psi),
fully close the Handle Lo valve, then cease vacuum pump
operations.
b. Wait for 5 minutes then check whether the gauge needle moves
after turning off the vacuum pump. If the gauge needle moves
backward, check whether there is gas leakage.
CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
(Outdoor unit)
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