3
Fan Speeds
Before operating unit, be sure that the proper blower speed has
been selected. Fan speeds are selected manually. (See Table 3)
NOTE
:
The low fan speed tap should not be used for
simultaneous heat pump and electric heat applications. Always
ensure the minimum CFM shown in Table 2 is met.
To change the fan speed on fan coils with PSC motors
:
The factory default is medium speed. To select the desired fan
speed for cooling, simultaneous heat pump and electric heat
operation, and anytime a “G” signal is present; connect the desired
fan motor speed tap wire to Fan Relay Terminal No. 4.
To select the desired fan speed for heating operation, anytime the
“G” signal is not present; connect the desired fan motor speed tap
wire to Fan Relay Terminal No. 6.
Always connect the unused fan--motor wire to the dummy terminal
block. The factory default for electric heat only operation is low
speed.
Table 3 – Color Code for PSC Motor Lead Wires
MOTOR SPEED TAP
WIRE COLOR
Common
Purple
High
Black
Medium
Red
Low
Blue
To change the fan speed on fan coils equipped with multi--tap
ECM motors:
Fan speeds are selected manually (See Table 4). At the motor
connection plug (See Fig. 3) connect the green wire to the desired
motor tap number indicated on the motor plug. For the electric heat
fan speed selection connect the white wire to the desired motor tap
number indicated on the motor plug.
1 2 3 4 5
Speed Taps may be located on motor,
or on plug close to motor.
CL
G
N
1 2 3 4 5
A11048
Fig. 3 -- ECM Motor Speed Taps
Table 4 – ECM Motor Speed Taps
Tap
Delay---
off
Time (s)
19
25
31
37
Tap 1
30
---
---
---
---
Tap 2
90
Default
---
Default
---
Tap 3
30
---
---
---
---
Tap 4
90
---
Default
---
Default
Tap 5
30
---
---
---
---
*The defaults shown are for cooling and simultaneous heat---pump / electric---
heat operation.
Transformer
All units are shipped from factory wired for 240VAC transformer
operation. For 208VAC operation, move primary lead from
240VAC terminal to 208VAC terminal, see Fig. 4.
240
COM
208
BLK
YEL
BLK
RED
SECONDARY
PRIMARY
A13092
Fig. 4 -- Connection of Transformer
VERIFY INSTALLATION
After completion of heater installation, check wiring to ensure
tightness and that proper connections and routings have been
made. Ensure all electrical covers are in place. Reinstall blower
access panel before turning unit power on.
