27
9. Check to be sure the area around the air source is clear of
construction dirt and debris.
10. Check that final filters are installed in the air handler(s).
Dust and debris can adversely affect system operation.
11. Verify that the zone controller and the air source controls
are properly connected to the communication bus.
12. Remember to utilize good duct design and to provide
sufficient straight duct at the inlet of the box. A minimum
of three times the inlet size is recommended.
Network Addressing —
Use the following method
when all the zone controllers are installed and powered, and the
SPT sensors are wired and functioning properly. This method
can be used if no addresses have been set previously. The
address of an individual zone controller may be set by using
the System Pilot. This is the standard method of setting the
address.
Each zone controller will default to an address of 0, 140
when its application software is initially loaded. Since multiple
controllers will be on the same bus, a unique address must be
assigned to each controller before the system can operate
properly. The assignment of controller addresses will be
performed through the System Pilot, as follows:
1. The System Pilot recognizes that the Zone Controller’s
address, stored in the zone controller memory, has not
been written yet (this will be true when the unit is first
powered up on the job, or after a jumper-initiated reset).
2. Press the override button on the SPT (terminals J4-14 and
J4-12 are shorted) for 1 to 10 seconds.
3. The zone controller address changes from 0, 140 to 239,
239 for a period of 15 minutes.
4. Use System Pilot to change the address from 239, 239 to
a valid system address within 15 minutes.
NOTE: If the address is not changed from 239, 239 to a valid
system address within 15 minutes, the controller will revert to
address 0, 140 and use of the override button will cause the
address function to repeat. The operator MUST actively set the
address even if the final desired address is 0, 140.
Initial Operation and Test —
Perform the following
procedure:
1. Apply 24 vac power to the control.
2. Using the System Pilot, upload the controller from
address assigned in Network Addressing section above.
3. From the Terminal Service Configuration screen, proper-
ly configure the damper type and inlet size. If a round
inlet is used, then enter the size directly in the Inlet
Diameter decision. If a square, rectangular, or elliptical
damper inlet is supplied, then enter the inlet size in square
inches in the Inlet Area decision.
4. If the terminal damper closes in the CW direction, then no
adjustment is required. Otherwise, locate the damper
direction configuration decision (CW Rotation) and
toggle the value to OPEN by using the space bar. This
configuration decision is also located on the Terminal
Service Configuration screen.
5. After entering the area and rotation direction, verify oper-
ation of the damper. From the System Pilot Diagnostic,
Maintenance Screen, select the Zone Commissioning
Table and force the Commissioning Mode point to
Enable. Then select the Damper Cal point and force this
point to Enable. The controller automatically tests the
actuator by fully closing the damper.
It checks the fully closed position to determine if the
control was properly mounted. It then opens the damper.
The control scales the actual actuator travel range used to
a 0 to 100% open value. Finally the control will close the
damper, test, and zero the pressure transducer. When
completed, the control automatically removes the force
from the Damper Cal point. If a failure occurs at any
point during the testing, the Damper Calibration Status
point at the bottom of the screen will indicate ALARM
and the test will be aborted.
6. The actuator stroke has now been calibrated for the prop-
er rotation.
Fan and Heat Configuration and Test —
Per-
form the following procedure to configure and test the fan and
heat:
1. Display the Terminal Service Configuration screen to
make sure the proper Terminal Type and Heat Type are
configured. See the Configuration section to answer
questions about the individual configurations.
2. From the Diagnostics Maintenance Screen select the
Zone Commissioning table.
3. Force the Commissioning Mode to Enable.
4. If the terminal is a parallel or series powered fan box,
force the Fan Override to Enable. If the damper is open it
may have to be repositioned to the proper position
depending on the box type. Damper percent change will
be displayed. After the damper is positioned correctly, the
fan relay should energize and the fan should run for a few
seconds.
5. Make sure the fan runs and the Fan Override decision
returns to disabled to ensure the fan is wired correctly for
proper operation.
6. Force the Heating Override to Enable. If the unit is a
single duct unit, this must be done with the primary termi-
nal at reheat set point. The damper will open to the reheat
cfm. The heat outputs will be commanded to provide
maximum heat. If the unit is a fan-powered terminal, the
fan must be on.
NOTE: The damper position settings can be found under
service configuration in the table AIRFLOW.
System Balancing —
To balance the system, perform
the following procedure:
1. Enable the balancing process by forcing System Com-
missioning to Enable.
2. Enable the All Zone Dampers to Max point.
3. The zone controller will send all system zone dampers to
their configured maximum positions and display the
values. Check the system maximum airflows to all zones
and set zone dampers while the system is at maximum
flow and the bypass damper is closed. Adjust maximum
damper position set points if required. The system can
also be balanced at design conditions with some dampers
closed.
4. If the user forces any zones to a new position, the new po-
sition is written to the zone’s maximum damper position
configuration value and the damper is repositioned.
5. Enable the All Zone Dampers to Min point.
Before starting the air source fan, make sure that dampers
at the system’s air terminals are not fully closed. Starting
the fan with dampers closed will result in damage to the
system ductwork.
Содержание 3V VVT 33ZCVVTZC-01
Страница 59: ......
