1 2 |
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units
Service Manual
08.2020
|
Bosch Thermotechnology Corp.
Data subject to change
6.5 Adding the Refrigerant to an Existing System
Figure 8
(Indoor Unit)
(Liquid Side)
(Gas Side)
(Outdoor Unit)
Liquid Service Line
Gas Service Line
Check Valve
Refrigerant
Cylinder
Electronic Scale
OPEN
CLOSE
Procedure
1. Connect the refrigerant manifold, blue suction hose to the gas service valve's
service port, open the liquid service valve and the gas service valve. Connect
the refrigerant manifold, yellow hose to the valve at the top or bottom of the
cylinder. If the refrigerant is R410A, ensure that cylinder is placed upside
down during the charging process.
2. Purge the air from the refrigerant manifold (yellow hose). Open the valve at
the top or bottom of the cylinder and press the check valve on the refrigerant
manifold to purge the air.
CAUTION: CONTAINS REFRIGERANT
f
Liquid refrigerant can cause frost bite. Handle with care.
3. Place the refrigerant cylinder onto the electronic scale and record the weight.
4. Operate the air conditioner in cooling mode.
5. Open the valve (low side) on the refrigerant manifold and charge the system
with liquid refrigerant.
6. When the electronic scale displays the proper weight (refer to the gauge and
the pressure of the low side), turn off the refrigerant low side valve and the
refrigerant cylinder valve. Then turn off the unit to remove the hose from the
gas service valve.
7. 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.
Recover the refrigerant as per Refrigerant Recovery and Recycling
Equipment manufacturers' speci
À
cation.
Refrigerant charging
Figure 9
(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
speci
À
ed 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 suf
À
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 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.
