Start-up
TruVu™ VVTBP
-E2
©2022 Carrier.
Installation and Start-up Guide
All rights reserved.
39
Performing system checkout
Bypass damper
1
Verify the TV-VVTBP-E2 is securely fastened to the bypass damper shaft and duct work.
2
Verify duct air temperature sensor is installed at the inlet of the damper or in the air source supply duct
upstream of the bypass damper connection.
3
Verify that the single tube from the controller's airflow (pressure) sensor is connected to the duct static
pressure probe downstream of the bypass damper. Then verify that the other connector is open when using a
ducted return, or connected to room space for plenum return.
4
Calibrate damper and pressure sensor:
a)
Disable the air source heating, cooling, and fan outputs using one of the following methods:
•
Physically disconnect the air source controller’s output wiring to the unit.
•
In the i-Vu® or Field Assistant navigation tree, select the RTU Open controller. Go to
Properties
>
Control Program
>
Configuration
>
Service Configuration
>
Service Test
, then enable
Service Test
. Make
sure all
other outputs under
Service Test
are disabled.
b)
Select the Bypass controller in the tree, then go to
Properties
>
Control Program
>
Unit Configuration
>
Bypass Control
>
Details
tab.
c)
Click
Damper Full Close
, then
verify that the damper is fully closed.
d)
Click
Damper Full Open
, then verify that the damper is fully open.
e)
Click
Zero Cal
to close the bypass damper and zero the pressure sensor. When
Done
appears, click
Apply
.
f)
Enable the air source fan output using one of the following methods:
•
Physically connect the air source controller’s fan enable wiring
at the unit.
•
In the i-Vu® or Field Assistant tree, select the RTU Open controller. Go to
Properties
>
Control
Program
>
Configuration
>
Service Configuration
>
Service Test
, then enable
Fan Test
. Make sure all
other outputs under
Service Test
are disabled.
g)
Select the Bypass controller in the tree, then go to
Properties
>
Control Program
>
Unit Configuration
>
Bypass Control
>
Details
tab.
h)
After the static pressure has stabilized, make sure that
Target Damper Position
and
Duct Static Pressure
are not locked and that
Target Damper Position
is >0% and <100%. You may have to adjust the
Duct
Static Pressure Setpoint
slightly to get the damper within this range.
i)
Using a branch-tee, connect a magnehelic gauge to the
High
tube on the controller's airflow sensor, then
measure the static pressure. If the measured static pressure is different from the
Duct Static Pressure
by
±.05 in. (+.012 kPa), click
Pressure Sensor Cal
, enter the measured value next to the button, then click
Apply.
j)
Remove the magnehelic gauge from the
High
tube and reconnect the pressure tubing.
k)
Click
Automatic Control
to return the bypass to normal control.
l)
Enable the air source’s heating and cooling outputs using one of the following methods:
•
Reconnect the a
ir source controller’s output wiring at the unit.
•
In the i-Vu® or Field Assistant tree, select the RTU Open controller. Go to
Properties
>
Control
Program
>
Configuration
>
Service Configuration
>
Service Test
, then disable
Service Test
and
Fan
Test
. Make sure all other outputs under
Service Test
are disabled.
Summary of Contents for TruVu VVTBP-E2
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