Mitsubishi Electric CITY MULTI PVFY-P12, Installation Manual

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13.4. Changing blower external static pressure
The air handler is equipped with an adjustable static pressure
setting. The available settings are shown in the table below.
Model Available ESP [in. WG]
PVFY-P12 0.30 0.50 0.80
PVFY-P18 0.30 0.50 0.80
PVFY-P24 0.30 0.50 0.80
PVFY-P30 0.30 0.50 0.80
PVFY-P36 0.30 0.50 0.80*
PVFY-P42 0.30 0.50 0.80
PVFY-P48 0.30 0.50 0.80
PVFY-P54 0.30 0.50 0.80**
*PVFY-P36 in Downflow External Static pressure: 0.60
**PVFY-P54 in Downflow External Static pressure: 0.70
The air handler will be set to 0.50 ESP from the factory.
The blower static pressure setting can be changed by changing the
dip switches SWA & SWC. Vertical, Horizontal Right, and Horizontal
Left Switch C will always be in the “1” position. When the air handler
is installed in the Downflow position, Switch C needs to be in the “2”
position.
External Static Pressure Switch A
0.3 in. WG
(75 Pa)
0.5 in. WG
(125 Pa)
( Factory Setting)
0.8 in. WG
(200 Pa)
Switch C Switch C
Vertical,
Horizontal Right,
Horizontal Left
(
Factory Setting)
Downflow
Locate the CN31 connector in the upper right-hand corner of the
circuit board. Carefully remove the connector with the jumper from
the board. Cut the jumper on the CN31 connector and wire a
normally closed safety float switch across these wires.
Carefully reinstall the connector back onto the board
Upper right corner
of circuit board
CN31
Normally Closed
Float switch
SWA
SWA
SWA
1
2
3
1
2
3
1
2
3
2
1
1
2
2
1
1
2
External Static Pressure Switch A
0.3 in. WG
(75 Pa)
0.5 in. WG
(125 Pa)
( Factory Setting)
0.8 in. WG
(200 Pa)
Switch C Switch C
Vertical,
Horizontal Right,
Horizontal Left
( Factory Setting)
Downflow
Locate the CN31 connector in the upper right-hand corner of the
circuit board. Carefully remove the connector with the jumper from
the board. Cut the jumper on the CN31 connector and wire a
normally closed safety float switch across these wires.
Carefully reinstall the connector back onto the board
Upper right corner
of circuit board
CN31
Normally Closed
Float switch
SWA
SWA
SWA
1
2
3
1
2
3
1
2
3
2
1
1
2
2
1
1
2