Pioneer WYC009AMFI20, Руководство по обслуживанию

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because the outdoor unit can only store a
certain amount of refrigerant, this is normal (the
amperage of the compressor will have to be
monitored in this case) Stop compressor when
the amperage approaches the name plate FLA
rating indicates
0.1Mpa(14.5Psi).
6). Now close the 3 way valve right away. the
pressure will rise during this time, this is normal.
There will be some pressure left in the system
this is normal, The indoor unit is now ready to
be serviced.
Disconnect the charge set, and tighten the
2-way and 3-way valve’s stem nuts.
Use a torque wrench to tighten the 3-way valves
service port cap to a torque of 18N.m(= 13.27
ft.lbs).
Be sure to check for gas leakage.
2. Sweeping (air purging) the system with
refrigerant after the service to the
refrigerant circuit of the indoor unit is
complete.
Procedure:
Sweeping the system can be used when the
unit has been pumped down, this eliminates the
need to loosen the flare connection on the 2
way valve (loosening and retightening flare
connections could cause a refrigerant leak)
1). Confirm that both the 2-way and 3-way
valves are set to the closed position.
2). Connect the charge set and a charging
cylinder to the service port of the 3-way valve
Leave the valve on the Refrigerant container.
3). Do not loosen the flare connection, Start with
the hose from the low pressure gauge that has
been connected to the 3 way valve service port
and loosen it at the gauge manifold connection,
next open the 2 way valve 1/2 half of a turn (this
will release the refrigerant that has been
isolated in the outdoor unit) The refrigerant will
travel thru the small refrigerant line and
evaporator coil in the indoor unit and back out
the low pressure hose that has been loosened
let the refrigerant sweep for about 50 seconds,
this will push and remove any air moisture and
noncodensables from the refrigeration circuit.
After 50 seconds has passed tighten the hose
on the low pressure gauge. The sweep is now
complete.
Next step, open the 2 way valve all the way then
the 3 way valve all the way and check for leaks.
4). Next step, Start the unit in the cooling mode
and check the pressure (remember the
pressure you recorded?) The unit is going to be
low on refrigerant from the sweeping process,
add refrigerant as needed from the refrigerant
container in the liquid state to achieve the
operating pressure that you recorded. The
process is now complete.
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and
discharge the refrigerant by loosening the flare
nut on the 2-way valve approximately 45’ until
the gauge indicates
0.3Mpa(43.5Psi) to 0.5
Mpa(72.5Psi).
6). Disconnect the charge set and the charging
cylinder, and set the 2-way and 3-way valves to
the open position
Be sure to use a hexagonal wrench to operate
the valve stems.
7). Mount the valve stems nuts and the service
port cap
Be sure to use a torque wrench to tighten the
service port cap to a torque 18N.m.
Be sure to check the gas leakage.
6.7 Evacuation after servicing the outdoor
unit refrigeration circuit.
1. Evacuation of the complete refrigeration
circuit, Indoor and outdoor unit.