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Service Manual
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
Refrigerant charging
Figure 18
(Indoor Unit)
(Liquid Side)
(Gas Side)
(Outdoor Unit)
Liquid Service Line
Gas Service Line
Open
Check Valve
Open
Electronic Scale
CLOSE
OPEN
Refrigerant
Cylinder
Procedure:
1. Connect the charge hose to the refrigerent cylinder, open the liquid and
the gas service valves. Connect the charge hose which you disconnected
from the vacuum pump to the valve at the top or bottom of the cylinder. If
the refrigerant is R410A, make the cylinder is upside down to ensure liquid
charge.
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 specified
amount of refrigerant, or can be charged with a little at a time (approximately
150g each time) , operating the air conditioner in the cooling cycle; however,
if one time is not sufficient, 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 air conditioner, turn
off the air conditioner before disconnecting the hose.
6. Replace valve stem caps on the service port. Use a torque wrench to tighten
the service port cap to a torque of 18N.m. Be sure to check for gas leakage.
For model: BMS500-AAM048-1CSXHC
For above models, there is a set of master valve, which will allow installer to vacuum
and recycle the refrigerant at a faster speed. Ensure master valves are fully open
prior to system operation.
Figure 19
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