Trane UniTrane FCD Installation Operation & Maintenance page 30

Electric heaters shall run with the minimum airflow described in following table. To maintain this minimum airflow
the fan motor shall not run below the following voltage. This results in reduced airflow operating range described in
the following table.
Minimum air flow (m 3 /h) function electric heater
m 3 /h
Unit Size
FED 100
FED 200
FED 300
FED 400
FED 500
FED 600
Voltage range
2 and 4 pipe cooling or heating
FED100 Voltage
V min 2
V medium 3.6
V max 5.1
FED200 Voltage
V min 2.3
V medium 4.1
V max 5.8
FED300 Voltage
V min 2.6
V medium 5.1
V max 7 .6
FED400 Voltage
V min 3
V medium 6.9
V max 9
FED500/FED600 Voltage
V min 3.5
V medium 5.2
V max 7
Example
FED 300
Operating range without electric heater or in cooling mode Graph 1
Operating range for electric heater 500 W - 750 W - 1000 W in heating mode Graph 2
Operating range for electric heater 1500 W - 2000 W in heating mode Graph 3
30
Installation
500 W
80
80
80
Minimum Voltage
2 pipe electric heat heating mode
Airflow range
Electric heater capacity
100%
V min
Airflow range
Airflow range
Electric heater capacity
100%
V min
Airflow range
Airflow range
Electric heater capacity
100%
V min
Airflow range
Airflow range
Electric heater capacity
100%
V min
Airflow range
Airflow range
Electric heater capacity
100%
V min
Airflow range
Electric heater capacity
750 W 1000 W
120 160
120 160
160
160
160
FED100
500 W
2.9
71%
500 W
3.2
74%
500 W
3.6
80%
1000 W
3
100%
1000 W
3.5
100%
1500 W 2000 W
240 320
240 320
240 320
240 320
FED200
750 W 1000 W
3.6 3.6
63% 63%
FED300
750 W 1000 W
3.6 3.6
80% 80%
FED400
1500 W 2000 W
3 3
100% 100%
FED500/FED600
1500 W 2000 W
3.5 3.5
100% 100%
3000 W
480
480
480
1500 W 2000 W
4.4 4.4
64% 64%
3000 W
3
100%
3000 W
3.5
100%
UNT-SVX10G-E4