Purging Procedures, Leak Test, And Test Run - Mitsubishi Electric MSZ-AP15VG Installation Manual

3- . CONNECTING THE INTERFACE/CONNECTOR CABLE TO THE AIR CONDITIONER
Connect the INTERFACE/CONNECTOR CABLE to the Indoor electronic control .C. board of the air conditioner with the connecting cable.
Cutting or extending the connecting cable of the INTERFACE/CONNECTOR CABLE results in defects in connecting.
Do not bundle the connecting cable together with power supply cord, Indoor/outdoor connecting wire, and/or earth wire.
Keep as much distance as possible between the connecting cable and those wires.
The thin part of the connecting cable should be stored and placed where customers cannot touch it.
Connecting
In case of simultaneous connection of CN104 and CN105.
Bundle CN105 and CN104
cables with cable tie.
CN104
CN105
Clamp to CN105 and x it
with a screw.

4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN

4-1. PURGING PROCEDURES AND LEAK TEST
1) Remove service port cap of stop valve on the side of the outdoor unit gas pipe. (The stop
valves are fully closed and covered in caps in initial state.)
2) Connect gauge manifold valve and vacuum pump to service port of stop valve on the gas
pipe side of the outdoor unit.
*4 to 5 turns Stop valve cap
(Torque 19.6 to
*Close
29.4 N•m, 200
*Open to 300 kgf•cm)
Hexagonal wrench
Service port cap
(Torque 13.7 to
17.7 N•m, 140 to
180 kgf•cm)
Precautions when using the control valve
R32
A
Open
Body
Make sure to re-
Close
Control
place the cap after
valve
the operation.
CN105
CN104
Compound pressure gauge
–
0.101 MPa
(for R32, R410A)
–
( 760 mmHg)
Pressure gauge
(for R32, R410A)
Stop valve
for LIQUID
Gauge manifold valve
(for R32, R410A)
Handle
Low
Handle High
Charge hose
Stop valve for
(for R32, R410A)
GAS
Adapter for
preventing the
Vacuum pump (or the vacuum
back ow
pump with the function to
prevent the back ow)
When attaching the control valve
to the service port, valve core may
deform or loosen if excess pressure
is applied. This may cause gas leak.
When attaching the control valve to
the service port, make sure that the
Service port
valve core is in closed position, and
then tighten part A. Do not tighten
part A or turn the body when valve
Charge
core is in open position.
hose
Thin part of the connecting cable.
Place this part where customers cannot touch it.
Air conditioner
Indoor electronic CN105 for INTERFACE
control .C. board CN104 for CONNECTOR CABLE
1) Remove the panel and the lower right corner box.
2) Open the covers of the Indoor electronic control .C. board.
3) Connect the connecting cable to CN105 and/or CN104 on the Indoor elec-
tronic control .C. board.
ass the thin part of the connecting cable through the rib as shown in the
gure.
4) Attach the cable clamp provided with Interface to the thick part of the con-
necting cable with a screw 4 16 as shown in the gure.
5) ass the connecting cable through the rib as shown in the gure.
6) Close the covers of the Indoor electronic control .C. board.
Be careful not to catch the thin part of the connecting cable in the cover.
Reinstall the panel and the lower right corner box.
F x the connect ng cable at the prescr bed pos t on securel .
Incorrect nstallat on ma cause electr c shock, re, and or malfunct on.
3) Run the vacuum pump. (Vacuumize until 500 microns is achieved.)
4) Check the vacuum with gauge manifold valve, then close gauge
manifold valve, and stop the vacuum pump.
5) Leave as it is for one or two minutes. Make sure pointer gauge
manifold valve remains in the same position. Con rm that pressure
gauge shows –0.101 MPa [Gauge] (–760 mmHg).
6) Remove gauge manifold valve quickly from service port of stop
valve.
To avo d r sk of re, make sure that there are no ammable
hazards or ignition risks before opening the stop valves.
7) After refrigerant pipes are connected and evacuated, fully open
all stop valves on both sides of gas pipe and liquid pipe. Operat-
ing without fully opening lowers the performance and this causes
trouble.
8) Refer to 1-3., and charge the prescribed amount of refrigerant if
needed. Be sure to charge slowly with liquid refrigerant. Otherwise,
composition of the refrigerant in the system may be changed and
affect performance of the air conditioner.
9) Tighten cap of service port to obtain the initial status.
10) Leak test
Thick part of the
connecting cable
WARNING
WARNING
EN-6