Start-up
4
Verify that zone terminal fans and system controls operate properly. Verify that actuator screws are properly
tightened.
5
At the zone terminals, check electrical system and connections of any optional electric reheat coil. If hot
water reheat is used, check piping and valves against job drawings.
6
Verify that all zone terminal dampers are fully open.
7
If using an air source with field-installed controls, make sure controls and sensors have been installed and
wired per manufacturer installation instructions.
8
Verify that the air source motor starter and, if applicable, the Hand/Off/Auto (HOA) switch are installed and
wired.
9
Verify that the area around the air source is clear of construction dirt and debris.
10
Verify that final filters are installed in the air handler(s). Dust and debris can adversely affect system
operation.
11
Verify that the space sensor and all optional sensors are reading correctly.
Before starting the air source fan, make sure the zone terminal dampers are not closed. Starting the fan with
dampers closed will damage the system ductwork.
Commissioning the VAV Zone Controller
Using Field Assistant or the i-Vu application:
1
Calibrate the damper travel.
a)
Go to
Properties
>
Configuration
>
Service Configuration
>
Flow Control
>
Details
tab >
Test and
Balance
. Click
Close Damper
and verify it goes to the closed position.
b)
Click
Dampers Full Open
and verify it goes to the full open position.
c)
Verify that the air source is off, and then calibrate the zero airflow reading at the terminal control. Click
Zero Flow
and verify the damper goes to the fully closed position and the airflow transducer is calibrated.
Once the
Autozero complete
message is displayed, make sure the Measured Flow column under
Calibration parameters for Zero Flow reads near zero cfm (liters/second) and the sensor reading should
be less than 0.03.
d)
Click
Automatic Control
to return the damper to normal operation.
2
For Parallel or Series Fan terminals – In the
Locks
section, select the
Fan
's
Lock value to
checkbox, then
select
On
in the droplist. Click
Apply
. Verify the fan's operation.
3
For modulating hot water reheat – Go to
Properties
>
I/O Points
tab, then lock
Hot Water Valve
to 100%. If
the controller is configured for Single Duct, make sure the air source fan is on. If ducted heat, verify the heat
works by verifying that the SAT rises. For baseboard heat, physically check the heating element for proper
temperature rise. Release the
Hot Water Valve
.
4
Release the fan.
5
If the controller is part of a linked system, verify
Linkage
>
Airside Linkage Status
shows
Active
.
CAUTION
Pressing the actuator release button and moving the damper or disconnecting the actuator ribbon
connector while the bypass controller is powered will cause the damper position to be out of calibration. To
recalibrate the damper position, you must perform steps 1a–1d above or power cycle the controller.
36
VAV Zone Controllers