Additional Refrigerant Calculations; Dip Switches - Mitsubishi Electric BDT CITY MULTI Installation And Pre-Commissioning Booklet

ADDITIONAL REFRIGERANT CALCULATIONS

• All AHU additional refrigerant calculations must be completed by BDT. The calculation is based
on the AHU coil volume (BDT has this data).
• Additional refrigerant can be charged into the system while under a vacuum. In some situations
the system will equalise to the bottle pressure before all of the additional refrigerant is in the
system. The remaining refrigerant can be charged in to the low side of the system while it is
running on either heating or cooling during the initial commissioning process.
• Any additional refrigerant must be liquid charged into the system.
• Additional refrigerant levels should be noted on each outdoor unit.
DIP SWITCHES OUTDOOR UNITS (S SERIES)
PUMY-P-V(Y)KM-A(-BS)
Switch Step Function
SWU1 1st digit
SWU2 2nd
digit
SW1
Digital
1~8
Display
Switch
1 Selects operating system startup
2 Connection information clear switch
3 Abnormal data clear switch input
SW2
Function
Switch
4 Pump down
5
6
1 ON/OFF from outdoor unit *
SW3 Trial
operation
2 Mode setting
MODEL SELECTION 1:ON 0:OFF
MODELS SW4
ON
SW4/
PUMY-P112VKM
OFF
SW8
1
1~6
ON
Model
PUMY-P125VKM
OFF
Switch
1
PUMY-P140VKM ON
OFF
1
Demand control setting for Demand
1
Responce Mode (DRM)
Change the indoor unit's LEV
2
opening at start-up
3
SW5
4 Auxiliary heater
Function
Switch
Change the indoor unit's LEV
5
opening at defrost
Switching the target sub cool
6
(Heating mode)
* Test run on PWFY series cannot be run by the outdoor unit. Use a switch on the indoor unit or a remote controller to perform test run.
** Refer to "8-6. OUTDOOR UNIT INPUT/OUTPUT CONNECTOR".
56
Operation in Each Switch Setting
ON OFF
0 0
SWU2 SWU1
(2nd digit) (1st digit)
ON
OFF
1 2 3 4 5 6 7 8
With centralized Without centralized
controller controller
Clear Do not clear
Clear
Normal
abnormal data
Run
adjustment Normal
mode
— — —
— — —
ON OFF
Heating Cooling
SW8 MODELS SW4 SW8
ON ON ON
PUMY-P112YKM
OFF OFF OFF
2 3 4 5 6 1 2 1 2 3 4 5 6 1 2
ON ON
ON
PUMY-P125YKM
OFF OFF
OFF
1 2 1 2
2 3 4 5 6 1 2 3 4 5 6
ON PUMY-P140YKM ON ON
OFF OFF OFF
1 2 3 4 5 6
2 3 4 5 6 1 2 1 2
Existing
DRM
demand mode**
Enable Normal
— — —
— —
Enable Normal
Enable Normal
Remarks
When to Set
<Initial settings>
Before turning
0 0
the power ON
SWU2 SWU1
(2nd digit) (1st digit)
<Initial settings>
Can be set either during
ON
operation or not. OFF
1 2 3 4 5 6 7 8
Before turning
the power ON
<Initial settings>
OFF to ON any time after
ON
the power is turned on.
OFF
1 2 3 4 5 6
During compressor
running
—
—
<Initial settings>
Any time after the
ON
power is turned ON.
OFF
1 2
Before the power <Initial settings>
is turned ON. Set for each capacity.
Can be set when
off or during
operation
<Initial settings>
OFF to ON during
compressor running. ON
OFF
1 2 3 4 5 6 7 8
Can be set when
OFF or during
operation
Purpose Additional Information
Turn ON when the centralized controller is
connected to the outdoor unit.
When relocating units or connecting additional
units.
To delete a check code history.
Please refer to a section referring
To facilitate outdoor unit the pumping down
to the pumping down on outdoor
operation.
unit's Installation Manuals.
Frequency = Fixed to 65 Hz
It might not be possible to collect
Indoor-electronic expansion valve = Fully open
all the refrigerant if the amount is
Outdoor fan step = Fixed to 10
excessive.
—
—
—
—
—
Do not turn this ON if the unit is in
Turn ON to activate the demand control for DRM.
outside Australia
To set the LEV opening at start-up higher than usual.
(Qj <14 + 500 pulses, 14 [ Qj + 75 pulses)
To improve the operation with the LEV almost up become louder.
clogged.
—
Turn ON when an auxiliary heater is connected. Turn ON only when the auxiliary
heater is connected and
(It transmits a connection permission signal of
operated.
the auxiliary heater to the connected indoor unit.)
To set the LEV opening higher than usual
during defrosting operation.
(Only Qj [ 10 is valid, + 300 pulses)
the defrosting operation become
To avoid the discharge temperature increase
louder.
To decrease the target sub cool value.
To reduce the discharge temperature
generated if the sub cool value is
decrease due to refrigerant liquid
too small.
accumulation in the units.
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—
—
—
—
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