Wiring inputs and outputs
TruVu™ VVTZC
-E2
©2022 Carrier.
Installation and Start-up Guide
All rights reserved.
55
Commissioning the TV-VVTZC-E2
Using Field Assistant or the i-Vu application:
1
Calibrate the damper travel.
a)
Go to
Properties
>
Configuration
>
Service Configuration
>
Pressure Dependent Control
>
Details
tab >
Test and Balance
. Click
Calibrated Damper Close
and verify it goes to the closed position.
b)
Click
Calibrated Damper Open
and verify it travels to the full open.
c)
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
.
Balancing the system
Most VVT system airflow designs are based on cooling requirements which require a greater CFM (liters/second)
flow than heating requirements. Using this balancing procedure, you will adjust the cooling airflow first. If the
heating and cooling maximum airflow requirements are the same, you will not need to balance the heating airflow.
NOTE
We recommend that the heating minimum airflow settings for all the zones in the system be set to maintain
the air source’
s design minimum heat CFM (liters/second) airflow across its heat exchanger to prevent damage to
the equipment.
There are two methods of balancing the system:
•
Use the i-Vu application or Field Assistant
–
Complete the following 3 steps to perform the system balancing.
•
Use the Test & Balance program
–
Test & Balance can perform the 3 steps below, including shutting down
the linked air source and performing global commands to all zones in the system. Do items 1
–
5 in Step 1
below prior to using Test & Balance. See Test & Balance's Help for required steps to complete the balancing
procedure.
Step 1: Prepare for balancing
1
Log in to the i-Vu® application with an Administrator or Installer security level, or use Field Assistant.
2
Make sure the air source and its controller have been properly started and can run as a stand-alone unit.
3
Make sure the zone and bypass controllers have been addressed, commissioned, and started.
4
Verify that a manual damper is installed upstream of the zone damper. This damper will be used to adjust the
maximum design airflow to the space when the zone damper is at 100% open. We strongly recommend that
you do not use the damper Cool or Heat Max damper configuration setting for this purpose. Exception: If the
design maximum airflow for one mode is less the other, the maximum damper position configuration may be
used to adjust the designed airflow of that mode.
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