Bosch CLIMATE 5000 Service Manual page 17

Air purging with vacuum pump
Low pressure gauge
Vacuum
pump
Vacuum
pump
Fig. 8.
Procedure:
1. Tighten the flare nuts of the indoor and outdoor units, and confirm
that both the liquid / gas valves are closed.
2. Connect the charge hose with the push pin of Handle Lo to the
service port.
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).
• 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)
(Liquid side)
(Indoor unit)
(Gas side)
Manifold
-0.1MPa
Handle Lo
Charge hose
Charge hose
Liquid valve
Gas valve / Service port
High
pressure
gauge
Handle Hi
6. Loosen the flare nut of the gas valve for 6 or 7 seconds and then
tighten the flare nut again.
a. Confirm the pressure display in the pressure indicator is slightly
higher than the atmospheric pressure.
b. Remove the charge hose from the gas valve.
7. Fully open the liquid / gas valves and tighten the valve caps.
Maintenance and Disassembly
(Outdoor unit)
Close
Close
17