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UNIT
INLET SIZE
SIZE
(in.)
6
2
8
10
8
4
10
13.5 x 8
UNIT
INLET SIZE
SIZE
(in.)
6
2
8
10
8
4
10
8 x 14
NOTE(S):
a. 45R maximum primary airflow (CFM) is based on 1.00 in. wg differential pressure signal from inlet airflow sensor.
b. Minimum recommended airflow (CFM) is based on 0.03 in. wg differential pressure of the inlet airflow sensor, or 0 airflow. 0.03 in. wg is equal to 15% to 20% of the
nominal flow rating of the terminal. Less than 15% to 20% may result in greater than +5% control of box flow.
c. 45R maximum/minimum fan airflow is based on 0.25 in. wg external (downstream) static pressure, respectively.
Speed Controller
Each Carrier fan powered air terminal unit is equipped with a fan
SCR speed controller, located on the bottom of the control box.
The SCR can be adjusted in the field.
NOTE: The 45J size 7 unit and 45Q size 4 unit have two SCR
speed controllers, one for each fan. One SCR is located in the stan-
dard position at the bottom of the control box; the other is at the
top of the control box.
The fan airflow output is dependent on the setting of the controller
and the downstream static resistance.
CAUTION
The minimum stop on the speed controller is factory set at an
internal minimum stop to prevent damage to the motor. Do not
attempt to override this minimum stop or electrical damage to
the fan motor may result.
1.
To increase the fan speed (RPM), turn the slotted adjust-
ment on the controller clockwise toward the "HI" marking
printed on the controller face plate (see to Fig. 11).
2.
To decrease the fan speed (RPM), turn the adjustment
counterclockwise toward the "LO" marking. (see Fig. 11).
Table 14 — 45R Parallel Fan Powered Terminal Unit
45R WITH PSC FAN MOTOR
FAN AIRFLOW
PRIMARY AIRFLOW
MIN
MAX
52 or 0
350
665
92 or 0
143 or 0
92 or 0
420
855
143 or 0
206 or 0
45R WITH ECM FAN MOTOR
FAN AIRFLOW
PRIMARY AIRFLOW
MIN
MAX
90 or 0
125
820
160 or 0
250 or 0
160 or 0
135
885
250 or 0
360 or 0
MOTOR HP
MIN
MAX
515
916
1/6
1432
916
1432
1/4
2062
MOTOR HP
MIN
MAX
515
920
1/3
1430
920
1430
1/3
2060
Fig. 11 — Fan Speed Controller
16
a,b,c
MOTOR AMPS
120V
208/240V
3.7
1.5
5.6
2.5
MOTOR AMPS
120V
208/240V
5.0
3.3
5.0
3.3
27 7 V 12 L
L O
R A N C O
1
M X F -5 44 00 2- 00
10 05 33 -0 1
277V
1.4
2.0
277V
2.6
2.6
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