Replacing Check Valve - Bosch ACS 753 Repair Instructions

Plumbing and Mechanical

Replacing Check Valve

WARNING: Disconnect the unit from
the power source before performing
service work. Incorrect use or
connections can cause electrical
shock.
WARNING: Wear safety goggles
when working with refrigerants.
Refrigerants can cause eye injury.
WARNING: Use extreme caution
w h e n d i s c o n n e c t i n g h o s e s .
Pressurized refrigerant may be
present in hoses. Point hoses away
from you and anyone nearby.
Instructions
These instructions outline the steps to replace
manifold, injection manifold, and solenoid
check valves. In some cases, the manifold
must be removed from the unit to gain access
to solenoids or other components.
Removing Check Valve
1. Disconnect the unit from the power source.
2. Remove the front plastic covers.
3. Depressurize the unit.
4. Remove the faulty check valve.
SP00D00609 2018-03-26
ACS 753, ACS 763, ACS 863 Service Manual
Installing Replacement Check Valve
1. Lubricate the O-rings on the new check
valve.
2. Install the new check valve and hand-
tighten.
3. Torque the check valve to 8-9 Nm (70-80
in-lb).
4. Mount the front plastic covers.
5. Connect the unit to the power source,
perform a function test, and check for leaks.
Removing Solenoid Check Valve
1. Disconnect the unit from the power source.
2. Remove the front plastic covers.
3. Depressurize the unit.
4. Refer to Removing Solenoid on the previous
page.
5. Remove the check valve from the manifold
after removing the solenoid.
Installing Replacement Solenoid Check
Valve
1. Lubricate the O-rings on the new check
valve.
2. Install the new check valve and hand-
tighten.
3. Torque the check valve to 8-9 Nm (70-80
in-lb).
4. Perform the Installing Solenoid procedures
on the previous page.
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Robert Bosch GmbH