5
Table 4 — 35N Dual Duct, Full Blending Basic Pressure Data — Inlet Sensor Pickup
*Assumes inlet flow sensor. For discharge flow sensor, use data for
next even size. CCN (Carrier Comfort Network®) controls permit a
lower minimum flow. Size 16 discharge is same as inlet.
NOTES:
1.
∆
P
s
is the difference in static pressure across the assembly,
with the damper fully open.
2. Minimum recommended airflow (cfm) is based on 0.03 in. wg
differential pressure on the inlet sensor or 0 airflow. 0.03 in. wg
is equal to 15-20% of the nominal flow rating of the terminal
unit. Less than 15-20% may result in greater than ±5% control
of the unit airflow. Some DDC controls, supplied by others, may
have different limitations.
3. Minimum airflow may be 0.
4. Maximum airflow (cfm) is based on a 1 in. wg differential
pressure from the airflow sensor.
5. To obtain Total Pressure, add the Velocity Pressure for a
given CFM to the Static Pressure drop (
∆
P
s
) of the desired
configuration.
Table 5 — 35N Dual Duct, Full Blending — Discharge Sensor Pickup
CCN —
Carrier Comfort Network
INLET
SIZE
(Area)
CFM
MINIMUM AIRFLOW
(CFM)
MINIMUM CCN
AIRFLOW (CFM)
MINIMUM INLET STATIC PRESSURE
(Unit Pressure Drop) (in. wg)
MINIMUM SYSTEM OPERATING
PRESSURE (in. wg) AT
MAXIMUM LISTED FLOW RATE
Velocity
Pressure
Basic
Unit
∆
V
PS
∆
P
S
6
(0.20)
100
90
or
0
52
or
0
0.01
0.03
0.42
240
0.06
0.16
380
0.15
0.40
520
0.28
0.72
8
(0.35)
200
160
or
0
93
or
0
0.01
0.03
0.44
440
0.06
0.15
675
0.14
0.36
925
0.26
0.68
10
(0.55)
300
251
or
0
145
or
0
0.01
0.04
0.43
675
0.05
0.20
1075
0.14
0.52
1450
0.25
0.94
12
(0.78)
450
361
or
0
208
or
0
0.01
0.04
0.43
1000
0.04
0.18
1550
0.09
0.44
2100
0.16
0.80
14
(1.07)
600
491
or
0
284
or
0
0.01
0.04
0.48
1375
0.04
0.23
2125
0.09
0.54
2900
0.17
1.01
16
(1.40)
800
642
or
0
371
or
0
0.00
0.04
0.48
1775
0.02
0.19
2725
0.04
0.44
3700
0.08
0.81
INLET
SIZE
MAX. PRIMARY
AIRFLOW (cfm)
MINIMUM AIRFLOW
Standard
CCN
6
927
185 or 0
93 or 0
8
1448
290 or 0
145 or 0
10
2085
417 or 0
208 or 0
12
2838
568 or 0
284 or 0
14
3706
741 or 0
371 or 0
16
Summary of Contents for 35L Series
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