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Installation
Actuator Checkout
The controller has a factory default setpoint of 105° F. This
setpoint can be adjusted by installing a field supplied 1/4 watt
resistor on 2TB34 in the low ambient control panel. Refer to
Table 3
for the resistance verses setpoint values and
Figure 10, p. 12
and
Figure 11, p. 13
terminals.
Inspect the damper blades for proper alignment and operation.
Dampers should be in the closed position during the Off cycle.
If adjustment is required, follow the previous steps in the
"Actuator Setup," p. 13
section.
Table 3.
Resistance versus setpoint values
Set Point Degrees Resistance Ohms
80
1.87K
85
2.74K
90
3.74K
95
4.87K
100
6.34K
105
Open
110
10.0K
115
12.7K
120
16.2K
125
20.5K
130
26.7K
135
36.5K
140
53.6K
To Check Damper Operation
WARNING
Live Electrical Components!
Failure to follow all electrical safety precautions when
exposed to live electrical components could result in
death or serious injury.
When it is necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been properly trained in
handling live electrical components perform these
tasks.
1. Remove the sensor leads from the input terminals 6 and 7
for circuit #1 and/or 11 and 12 for circuit #2.
2. Jumper between the sensor input terminals 6 and 7 and/or
11 and 12 (if applicable). Controller output signal will go to
10 VDC and the damper will drive to the full open position,
when power is restored.
3. Turn the main power disconnect switch On and verify that
the dampers drive to the full open position.
Important:
High voltage is present at terminal block 1TB1
OR unit disconnect switch 1S14.
4. Remove the jumper between the sensor input terminals 6
and 7 and/or 11 and 12 (if applicable). Controller output
14
for the appropriate
signal will go to 0.0 VDC and the damper will drive to the
closed position.
5. Turn the main power Off and remove all jumpers and
reconnect all sensor leads.
6. Replace actuator control panel cover, unit access panels,
etc.
7. Restore the unit to the Operational status.
ACC-SVN137C-EN
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