Caution Concerning Equipment Used For Replacement; I Outdoor Unit - Mitsubishi Electric CITY MULTI PUHY-P200-YREM-A Manual De Instalación

• Do not use the following tools that are used with conventional refriger-
ants.
(Gauge manifold, charge hose, gas leak detector, reverse flow check valve,
refrigerant charge base, refrigerant recovery equipment)
- If the conventional refrigerant and refrigerator oil are mixed in the R407C,
the refrigerant may deteriorated.
- If water is mixed in the R407C, the refrigerator oil may deteriorate.
- Since R407C does not contain any chlorine, gas leak detectors for conven-
tional refrigerants will not react to it.
• Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
• Be especially careful when managing the tools.
- If dust, dirt, or water gets into the refrigerant cycle, the refrigerant may dete-
riorate.
1.3. Caution concerning equipment used for
replacement
• Do not operate the valve before conducting mineral oil recovery opera-
tion.
- Operating valves before conducting mineral oil recovery operation may cause
a deterioration in the performance of mineral oil recovery.
Caution to REPLACE MULTI Installation Work
Flow of Installation work in the field
Confirming the possibility of existing refriger-
ant piping for reuse
Confirming the possibility of existing control
wiring for reuse
Confirming the possibility of existing power
source system for reuse
Confirming the objective range for replacing
Recovering the refrigerant of old system
Removing the outdoor/indoor units, remote
controllers, etc.
Installing the outdoor/indoor units, remote con-
trollers, etc., and executing electrical work
Setting the address checking the system
6
• For mineral oil recovery operation, the system controller and MA remote
controller may be required to be remove sometimes.
- Improper handling can lead to an inability to perform oil recovery operation.
- For removal, follow the instruction displayed on the PC for mineral recovery.
- Mount the controllers again after finishing the oil recovery operation.
• Observe a safe distance from the indoor unit fan, which runs during the
mineral oil recovery operation.
- Working in the surrounding of the indoor unit fan can cause personal injury.
• Record the quantity of refrigerant replenished.
(Enter into the column for replenished refrigerant quantity on the label of
the indoor unit.)
- Missing the description may deteriorate the performance of mineral oil re-
covery.
- Malfunction or poor cooling/heating may also be caused.
• During the mineral oil recovery operation, an error display may be shown
on the remote controller or system controller.
- When an error display was shown during mineral oil recovery operation, re-
set the error display after finishing the operation.
• To conduct the refrigerant recovery/evacuation of the inside of exiting
piping, choose tools only used with R407C e.g. charging hose.
- Using a charging hose for R407C causes it to mix the conventional refriger-
ating machine oil leading to the deterioration of refrigerating machine oil.
Items to be observed
• Please note that our Corporation is not liable to the reliability of existing piping, wiring and power
system for reuse (in relation with the gas leak of piping, partially defective/disconnection of wir-
ing, deteriorated insulation, characteristic faults due to worn out system).
• For limitation on the refrigerant piping and applicable piping diameter, check the existing piping
for reuse in accordance with the specified check sheet by referring products catalogs and manu-
als for judgement to reuse.
• If vapor condensation was found in the past, check the thermal insulation.
• For a portion suffered by condensation dripping, check the deterioration of the insulation, and
repair the insulation materials if required.
• When the copper piping is seriously deteriorated, do not use parts with verdigris or black spots.
• For reusing the existing control wiring between the outdoor unit, and remote controller, check the
wire type, size or the like based on the check sheet to judge the possibility.
• Even when the above does not meet the item on the check sheet, existing wiring may be reused
depending on the number of connecting indoor units and piping length. Ask us for detail.
• For the power source system employ the voltage and number of phase meeting the outdoor unit,
indoor unit and heat storage unit, and adopt the breaker capacity and wiring size based on the
power source wiring connection diagram.
• When the existing power source system (including the power source wiring) is used, check the
system for deterioration and damages.
• Check the refrigerating machine oil used in the existing system. (As is found at the oil inspection,
if the refrigerating machine oil used in the existing system is mineral oil, use the ester oil sam-
pling kit for inspection.
• When the length of piping for reuse is unknown, additional refrigerant charge is to be calculated
based on the quantity of recovered refrigerant. For this reason, you are kindly requested to
recover all refrigerant inside the existing outdoor/indoor units and extended piping to check and
record the quantity, (The standard of additional refrigerant is (Quantity of R22 recovered - Charged
quantity of existing outdoor unit + 3kg). Adjust the refrigerant quantity after mineral oil recovery
operation.)

I Outdoor unit

• Confirm the space around the outdoor unit.
(Verifying the installation space of the oil trap kit)
I Turn the power sources on, and confirm the normality of the system
• Check the remote controller or outdoor unit for error display.
• Run the indoor unit for fan operation after turning the remote controller on, and check the air
feeding and direction.
Do not run the compressor until finishing the mineral oil recovery operation.