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S Vapor line: Selectable with various diameters by using the up and down
buttons
Next, the installer will enter the WEIGH IN screen to verify the curre nt total charge
is accurate. Once the installer has confirmed, touch DONE.
Next, the installer will enter the SERVICE VALVE SUBCOOL screen. This screen
will show the current liquid line subcool target (in _F). To begin the charging, touch
START. If the outdoor temperatures are not in the required range, Service Valve
Subcool may not be available.
Next, the installer will enter the SERVICE VALVE INFORMATION screen. The
current liquid line subcool tar get, stabilization time, mode and speed in rpm, EXV
position in percent, indoor airflow in CFM, outdoor coil temperature in _F, indoor
temperature in _F, outdoor temperature in _F, compressor discharge pressure in
psig, and accumulator suction pressure in psig are displayed on this screen. Once
the stabilization time has expired, touch DONE.
6.6.2. Pump down
Because this system has an inverter controlled compressor, suction pressure
transducer and EXV, conventional procedure cannot be used to “pump down” and
isolate the refrigerant into the outdoor unit. The control has provisions to assist in
performing this function.
S Select mode to pump down in (COOL or HEAT). COOL mode allows
refrigerant to be isolated in outdoor unit. HEAT mode allows the refrigerant to
be isolated in indoor coil and lineset. Set desired time period.
d Default time period for procedure is 120 minutes.
S Touch START to begin the pump down process. Unit will begin running in
selected mode after a brief delay.
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