Test Operation - Aiwa ACD-24KBTU Gebrauchsanweisung, Installationsanleitung

Step 6: Vacuum Pumping
1) Use a spanner to take down the protective caps
from the service port, low pressure valve and high
pressure valve of the outdoor unit.
2) Connect the pressure hose of manifold gauge to
the service port on the outdoor unit low pressure
valve.
3) Connect the charge hose from the manifold gauge
to the vacuum pump.
4) Open the low pressure valve of the manifold gauge
and close the high pressure valve.
5) The vacuum time should not be less than 15
minutes, or make sure the compound gauge
indicates -0.1 MPa (-76 cmHg)
6) Turn on the vacuum pump to vacuum the system
7)
Close the low pressure valve of the manifold gauge
and turn off the vacuum.
Compound gauge
Low pressure valve
Service port
High pressure valve
Valve protective caps
Pressure hosecaps

TEST OPERATION

Inspections Before Test Run
Do the following checks before test run.
Description
Electrical
safety inspection
Installation
safety
inspection
26 ACD-24KBTU
• Check whether the power supply voltage complies with specification.
• Check whether there is any wrong or missing connection between the power lines,
signal line and earth wires.
• Check whether the earth resistance and insulation resistance comply with
requirements.
• Confirm the direction and smoothness of drainage pipe.
• Confirm that the joint of refrigerant pipe is installed completely.
• Confirm the safety of outdoor unit, mounting plate and indoor unit installation.
• Confirm that the valves are fully open.
• Confirm that there are no foreign objects or tools left inside the unit.
• Complete installation of indoor unit air inlet grille and panel.
8) Hold the pressure for 5 minutes, make sure that
the rebound of compound gauge pointer does not
exceed 0.005 MPa.
9)
Open the low pressure valve counterclockwise
for 1/4 turn with hexagonal wrench to let a little
refrigerant fill in the system, and close the low
pressure valve after 5 seconds and quickly remove
the pressure hose.
10) Check all indoor and outdoor joints for leakage with
soapy water or leak detector.
11) Fully open the low pressure valve and high pressure
valve of the outdoor unit with hexagonal wrench
12) Reinstall the protective caps of the service port,
low pressure valve and high pressure valve of the
outdoor unit.
13) Reinstall the valve cover.
Manifold gauge
Pressure gauge
High pressure valve
Low pressure valve
Charge hose
Vacuum pump
Inspection method