RT-SVX34R-EN
51
applied linearly across the sensing range of the airflow
sensor which may produce inaccuracies at airflow
levels not close to the value at which the calibration
adjustment was made.
Sequence for Setting Calibration
•
If unit is configured with DCV, disconnect CO
2
sensor prior to powering unit. After calibration
remove power from unit and reconnect CO
2
sensor.
•
Adjust the Design Minimum OA Flow Setpoint
potentiometer (R130/R41) on the RTVM to your
desired flow rate for minimum ventilation (See
).
•
Initiate service test and step to the minimum
ventilation step. This will set the unit into a constant
ID fan speed and OA damper request to minimum
position. Minimum position will be from the Traq
calculation to maintain the OA flow at the setpoint.
•
Allow the damper position to settle to the desired
flow rate set by the setpoint.
•
Measure the OA flow rate via an air balancing
instrument.
•
Adjust the OA flow adjustment setpoint
potentiometer (R136) clockwise or counter-
clockwise to “dial in” the flow to match the
instrument in (See
Table 29.
Design minimum OA flow setpoint
Design Min OA Flow
Setpoint (R130)
DCV Min OA Flow
Setpoint (R41)
Voltage
Reading
Airflow CFM
Airflow CFM
Voltage Vdc
1000
1000
0.2
1100
1100
0.22
1200
1200
0.24
1300
1300
0.26
1400
1400
0.28
1500
1500
0.3
1600
1600
0.32
1700
1700
0.34
1800
1800
0.36
1900
1900
0.38
2000
2000
0.4
2100
2100
0.42
2200
2200
0.44
2300
2300
0.46
2400
2400
0.48
2500
2500
0.5
2600
2600
0.52
2700
2700
0.54
2800
2800
0.56
2900
2900
0.58
3000
3000
0.6
3100
3100
0.62
3200
3200
0.64
3300
3300
0.66
3400
3400
0.68
3500
3500
0.7
3600
3600
0.72
3700
3700
0.74
Table 29.
Design minimum OA flow setpoint
(continued)
Design Min OA Flow
Setpoint (R130)
DCV Min OA Flow
Setpoint (R41)
Voltage
Reading
Airflow CFM
Airflow CFM
Voltage Vdc
3800
3800
0.76
3900
3900
0.78
4000
4000
0.8
4100
4100
0.82
4200
4200
0.84
4300
4300
0.86
4400
4400
0.88
4500
4500
0.9
4600
4600
0.92
4700
4700
0.94
4800
4800
0.96
4900
4900
0.98
5000
5000
1
5100
5100
1.01
5200
5200
1.02
5300
5300
1.03
5400
5400
1.04
5500
5500
1.05
5600
5600
1.06
5700
5700
1.07
5800
5800
1.08
5900
5900
1.09
6000
6000
1.1
6100
6100
1.11
6200
6200
1.12
6300
6300
1.13
6400
6400
1.15
6500
6500
1.17
6600
6600
1.18
6700
6700
1.19
6800
6800
1.2
6900
6900
1.22
7000
7000
1.23
7100
7100
1.24
7200
7200
1.25
7300
7300
1.26
7400
7400
1.27
7500
7500
1.28
7600
7600
1.29
7700
7700
1.3
7800
7800
1.31
7900
7900
1.32
8000
8000
1.34
8100
8100
1.36
8200
8200
1.38
8300
8300
1.39
8400
8400
1.4
8500
8500
1.41
8600
8600
1.42
8700
8700
1.43
8800
8800
1.44
8900
8900
1.45
9000
9000
1.46
9100
9100
1.47
9200
9200
1.48
9300
9300
1.5
9400
9400
1.52
9500
9500
1.53
9600
9600
1.54
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