146
RT-SVD03L-EN
Set Up the LOW Fan Speed Damper
Positions
•
Enter into the test mode to the supply fan test step
(1st step in test mode).
•
Adjust the R130 potentiometer on the RTVM to set
the LOW fan speed design minimum damper
position. The design minimum position set point
controls the damper position when there is a high
concentration of CO
2
in the space and ventilation is
required. The damper can be set from 0% open to
100% open during the LOW fan speed.
•
Adjust the R41 potentiometer on the RTVM to set
the LOW fan speed DCV minimum position. The
DCV minimum position set point controls the
damper position when there is a low concentration
of CO
2
in the space. The damper can be set from 0%
open to 100% open in the LOW fan speed.
•
Ensure that the R130 LOW fan speed design
minimum damper position is set greater than the
LOW fan speed DCV minimum damper position.
•
Blow on the CO
2
sensor to simulate a high
concentration of CO
2
to confirm the economizer
damper responds to the call for ventilation.
This procedure must also be repeated for the MEDIUM
and HIGH fan speeds.
Set Up the MEDIUM Fan Speed Damper
Position
•
Advance to the 3rd step in the test mode (1st stage
compressor). This forces the supply fan to the
MEDIUM fan speed.
•
Adjust the R136 potentiometer on the RTVM to set
the MEDIUM fan speed Design minimum damper
position. The damper can be set from 0% open to
approximately 75% open in the MEDIUM fan speed.
•
There is no ‘DCV min’ setup for MEDIUM fan speed.
The value from R41 from the previous step is
retained for the MEDIUM fan speed.
•
Again blow on the CO
2
sensor to simulate a high
concentration of CO
2
to confirm the economizer
damper responds to the call for ventilation.
Set Up the HIGH Fan Speed Damper
Positions
•
Advance to the full compressor cooling in the test
mode (both compressor running) or any stage of
heat. This forces the supply fan to the High fan
speed.
•
Adjust the ‘design min’ potentiometer on the RTEM
to set the HIGH fan speed Design minimum damper
position. The damper can be set from 0% open to
approximately 50% open in the High fan speed.
•
Adjust the ‘DCV min’ potentiometer on the RTEM to
set the High fan speed DCV minimum position.
•
Again blow on the CO
2
sensor to simulate a high
concentration of CO
2
to confirm the economizer
damper responds to the call for ventilation.
After this procedure is finished adjust the lower limit
(LL) CO
2
PPM adjustment potentiometer and the upper
limit (UL) CO
2
PPM adjustment potentiometer on the
RTEM to the required settings for the application. This
is often determined by local codes.
RTVM modules for light commercial units are different
than RTVM modules for large commercial units and are
not interchangeable.
Design minimum position set up is different for light
commercial multi-speed supply fan and single-zone
VAV units without DCV.
Communicated BAS set points override any local
potentiometer setting.
Summary of Contents for ReliaTel
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