Commissioning The Vvt Zone Ii; Balancing The System - Carrier VVT Zone II Installation And Startup Manual

Start-up

Commissioning the VVT Zone II

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.
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–1c above or power cycle the controller.

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.
VVT Zone II Controller
Installation and Start-up Guide
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