Product Overview

P266 Series Single-Phase Condenser Fan Speed Control Product Bulletin 3
Split Winding Mode enables the M2 Triac on the
P266 Series control, which allows you to split the
motor’s main windings from the auxiliary windings (and
the M1 Triac) and power the main windings with the M2
Triac. Split winding operation increases fan motor
efficiency.
Note: Split Winding Mode is available for only
240 VAC single-phase PSC motors that have split
winding wire leads. Refer to the motor manufacturer’s
installation instructions to determine if your fan motor
may be wired to enable the Split Winding Mode.
Copeland Digital Scroll™ Compressor Mode allows
you to use the P266 Series control on a system that
uses a digital scroll compressor. Failure to enable the
digital scroll compressor mode when using a digital
scroll compressor may cause your condenser fan to
oscillate.
Low-Speed Capacitor Mode allows you (on some
P266 Series models) to connect a low-speed capacitor
to the control’s M3 triac and the fan motor’s auxiliary
windings and power the M3 triac, which provides
additional power to the motor at low speed. In many fan
motor speed applications, the addition of the low-speed
capacitor circuit can provide more efficient, quiet and
cooler motor operation at low speeds.
Changeover Voltage determines the voltage at which
the P266 Series control connects and disconnects
power to the M3 triac, low-speed capacitor, and
auxiliary motor windings (Figure 3).
Auxiliary Fan Stage Mode allows you to set up the
P266 Series control to cycle (On/Off) up to three
additional (fixed-speed) fan motors or fan stages in
conjunction with the variable speed fan controlled by
the P266 Series control. Three low-voltage circuits can
be wired to control the auxiliary fan motor/stage
starters.
Figure 4 shows a P266 Series control application with
one auxiliary fan operating in conjunction with the
speed-controlled fan. When the condenser load
exceeds the output capacity of the speed-controlled
fan, the P266 Series control powers On the auxiliary
fan and shifts the speed-controlled (P266) fan to a new
start pressure.
Figure 2: Relationship between Some P266
Series Fan Speed Control Values and Modes
Start
Pressure
End
Pressure
0
Start
Voltage
End
Voltage
Mode
Low Pressure Mode
Off
V
o
l
t
age
t
o
M
o
t
or
Low
Pressure
Mode
On
Pressure at Sensor
V
o
l
t
a
g
e
t
o
M
o
t
o
r
FIG:
p
266_Valu_Rel
s
Figure 3: Low-Speed Capacitor Operation
Start
Pressure
End
Pressure
0
Start
Voltage
End
Voltage
LPM
Off
Voltage to
M
otor
LPM On
Pressure at Sensor
Low-Speed Capacitor
Enabled
Low-Speed Capacitor
Disabled
V
o
l
t
a
g
e
t
o
M
o
t
o
r
Changeover Voltage
CV
FIG
:
p
266_CV_Rels
Figure 4: Graph Showing a Speed-Controlled
(P266) Fan Operating with One Auxiliary (On/Off)
Fan Stage over the Entire Pressure Range
Start
Pressure
End
Pressure
0
Pressure at Sensor
Total
1st
Stage
P
2
6
6
F
a
n
O
u
t
p
u
t
Auxiliary
Fan
Output
% Fan
Overlap
Aux.Fan
Plus
P266 Fan
Output
P266 Fan
Stage
Shift
P
2
6
6
F
a
n
O
u
t
p
u
t
Output Capacity
On
Off
Fan Throttling Range
Fig:AuxFanOvrlap