Siesta ATY25FMV1B Manuel D'installation page 10

• All wires must be firmly connected.
• All wires must not touch the refrigerant piping, compressor
or any moving parts of the fan motor.
• The connecting wires between the indoor unit and the
outdoor unit must be clamped on the wire clamps as shown
in the figure.
• The power supply cord must be equivalent to H05VV-F
(60227 IEC 52 or 60227 IEC 53) which is the minimum
requirement, and to be used in protective tube.
Purging The Piping And The Indoor Unit
Except for the outdoor unit which is pre-charged with refrigerant, the indoor
unit and the refrigerant connection pipes must be air-purged because the air
containing moisture that remains in the refrigerant cycle may cause malfunc-
tion of the compressor.
• Remove the caps from the valve and the service port.
• Connect the center of the charging gauge to the vacuum pump.
• Connect the charging gauge to the service port of the 3-way valve.
• Start the vacuum pump. Evacuate for approximately 30 minutes. The
evacuation time varies with different vacuum pump capacity. Confirm that
the charging gauge needle has moved towards -760mmHg.
Caution:
• If the gauge needle does not move to -760mmHg, be sure to check for gas
leaks (using the refrigerant detector) at flare type connection of the indoor
and outdoor unit and repair the leak before proceeding to the next step.
• Close the valve of the charging gauge and stop the vacuum pump.
• On the outdoor unit, open the suction valve (3 way) and liquid valve (2 way)
(in anti- clockwise direction) with 4mm key for hexagon sacked screw.
Additional Charge
The refrigerant is pre-charged in the outdoor unit. If the piping length is less than 7.6m (25ft), then additional charge after vacuuming is not
necessary. If the piping length is more than 7.6m (25ft), then use the additional charge valve as indicated in the table.
Additional refrigerant charge [g] per additional 1m length as tabulated for R22 models.
Indoor
Outdoor
Additional Charge [g/m]
Additional refrigerant charge [g] per additional 1m length as tabulated for R410 models.
Indoor
Outdoor
Additioal Charge [g/m]
E.g.
ATYN25FMV1B & ARY25FMV1B with 12m piping length, additional piping length is 4.4m. Thus,
Additional charge = 4.4[m] * 23 [g/m]
= 101.2[g]
Charge Operation
This operation must be done by using a gas cylinder and a precise
weighing machine. The additional charge is topped-up into the outdoor
unit using the suction valve via the service port.
• Remove the service port cap.
• Connect the low pressure side of the charging gauge to the suction
service port center of the cylinder tank and close the high pressure
side of the gauge. Purge the air from the service hose.
• Start the air conditioner unit.
• Open the gas cylinder and low pressure charging valve.
• When the required refrigerant quantity is pumped into the unit, close
the low pressure side and the gas cylinder valve.
• Disconnect the service hose from service port. Put back the service
port cap.
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VACUUMING AND CHARGING
ATY25FMV1B ATY35FMV1B
ARY25FMV1B ARY35FMV1B
23 23
ATYN25FMV1B ATYN35FMV1B
ARYN25FMV1B ARYN35FMV1B ARYN50FMV1B ARYN60FMV1B
16 16
9
Wire Clamp
Interconnection
Cable
Allen Key
Service Port
Liquid Side
Indoor Unit
Gas Side
Open
Vacuum
Pump
Low
Close
ATY50FMV1B ATY60FMV1B
ARY50FMV1B ARY60FMV1B
22
ATYN50FMV1B ATYN60FMV1B
14
Liquid Side
Indoor Unit
Gas Side
Check
Valve
Hi
Low
Close
Power Supply
Cable
Refrigerant Piping
Flare Nut
Outdoor Unit 3 Ways Valve
Outdoor Unit
Discharge Valve
Close
Suction Valve
Close
Hi
ATY71FMV1B
ARY71FMV1B
56 56
36
Outdoor Unit
Discharge Valve
Open
Suction Valve
Open