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Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit Service Manual
04.2020 | Bosch Thermotechnology Corp.Data subject to change
4.7 Re-Installation While the Outdoor Unit Needs to be Repaired
Evacuation for the whole system
Figure 6
(Indoor Unit)
(Liquid Side)
(Gas Side)
(Outdoor Unit)
Liquid Service Line
Gas Service Line
Open
Open
Close
Vacuum Pump
Open
Procedure:
1. ConÀ rm that both the liquid and gas service valves are set to the opened
position.
2. Connect the vacuum pump to gas service valve’s service port.
3. Evacuate for approximately one hour. ConÀ rm that the refrigerant manifold
low side indicates -0.1Mpa(14.5Psi).
4. Close the valve (Low side) on the charge set, turn off the vacuum pump, and
conÀ rm that the gauge needle does not move (approximately 5 minutes after
turning off the vacuum pump).
5. Disconnect the charge hose from the vacuum pump.
Refrigerant charging
Figure 7
(Indoor Unit)
(Liquid Side)
(Gas Side)
(Outdoor Unit)
Liquid Service Line
Gas Service Line
Open
Check Valve
Open
Charging
Cylinder
Electronic Scale
CLOSE
OPEN
Procedure:
1. Connect the charge hose to the charging cylinder, open the liquid and the
gas service valve. Connect the charge hose which you disconnected from the
vacuum pump to the valve at the bottom of the cylinder.
2. Purge the air from the charge hose. Open the valve at the bottom of the
cylinder and press the check valve on the charge set to purge the air (be
careful of the liquid refrigerant).
3. Put the charging cylinder onto the electronic scale and record the weight.
4. Open the valves (Low side) on the refrigerant manifold and charge the system
with liquid refrigerant If the system cannot be charge with the speciÀ ed
amount of refrigerant, or can be charged with a little at a time (approximately
150g (5.3 oz) each time), operating the system in the cooling cycle;
however, one time is not sufÀ cient, wait approximately 1 minute and then
repeat the procedure.
5. When the electronic scale displays the proper weight, disconnect the charge
hose from the gas service valve’s service port immediately. If the system has
been charged with liquid refrigerant while operating the system, turn off the
system before disconnecting the hose.
6. Mount the valve stem caps and the service port. Use torque wrench to tighten
the service port cap to a torque of 18N.m. Be sure to check for gas leakage.
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