Configuration & Setup
27
VAV/Zone Controller Package
START-UP & COMMISSIONING
VAV/Zone Controller Con
fi
guration
& Setup
Confi guration can be accomplished by using either the Modular
Service Tool SD, Modular System Manager SD, or a computer
with Prism 2 software installed. Several options are available to
confi gure the VAV/Zone Controller for the appropriate equip-
ment it is installed on. All of these options can be set from the
Con
fi
guration Menu
or
Con
fi
guration Screens
with the exception
of “AHU Heating Call Setpoint” which is set from the
Setpoints
Menu
or
Setpoints Screens
.
Box Control Method
Set this confi guration item for the type of box the VAV/Zone
Controller is used on. All options below are available with and
without reheat. The options are:
•
Cooling Only Box (VAV)
•
Heating/Cooling Changeover Box (Zoning)
•
Series Fan Powered Box (VAV & Zoning)
•
Parallel Fan Powered Box (VAV & Zoning)
Damper Operating Mode
This option sets the direction of rotation the damper moves when
driving towards its full open position. The options available are:
•
Direct Acting ( Clockwise-to-Open Damper)
•
Reverse Acting ( Counterclockwise-to-Open Damper)
NOTE:
The Default is Direct Acting, which means
that when looking at the damper shaft, the damper
rotates clockwise to open. When the operating mode is
changed, the damper will re-calibrate.
Voting Zone
When the VAV/Zone Controller is being used on a Zoning sys-
tem as opposed to a true VAV system, this option must be set
to allow the MiniLink to determine if this controller should be
included in the zoning system voting process. If this is set to Yes,
this controller will be included in the voting process. If this is a
zoning system and it is set to No, this controller will not vote in
the zoning system voting process. If this is a true VAV system,
the option should be set to No. A maximum of 16 voting zones
can be confi gured. The options available are:
•
Yes
•
No
Pressure Independent Boxes-Air
fl
ow @ 1” W.C.
If this is a pressure independent box, this option allows you to
calibrate the box CFM correctly using the box manufacturer’s “K”
factor. Enter the correct “K” ( CFM) factor for the inlet diameter
of the box you are confi guring. See the “K” factor table that fol-
lows if you are using the Round VAV/Zone Dampers.
Air
fl
ow @ 1” W.C. Across Air
fl
ow Pickup
On Round Damper
Damper Size
K-Factor (CFM) Velocity (FPM)
6” Nominal Dia.
448
2282
8” Nominal Dia.
904
2590
10” Nominal Dia.
1436
2633
12” Nominal Dia.
1891
2408
14” Nominal Dia.
3015
2820
16” Nominal Dia.
3889
2749
NOTES:
K-Factor in the table is corrected to 70 °F @ 1000 ft.
elevation. For other elevations add 2% for each additional 1000
ft. of elevation.
Add 1% for each additional 10 degrees of temperature increase.
Expansion Relays - Steps of Reheat
If the box has Reheat supplied by an Electric Coil, this option must
be set for the number of Electric Heating stages on the box. If the
box has Hot Water Heat with a 2 position Hot Water Valve, set
the number of stages to 1. For Hot Water Heat with a proportional
Hot Water Valve, this must be set for 0. Options available are:
•
No Staging
•
1 Stage of Reheat
•
2 Stages of Reheat
•
3 Stages of Reheat
Proportional Heating Signal
If the box has Hot Water Reheat using a proportional Hot Water
Valve, set this option to match the voltage signal required by the
Hot Water Valve you are using. Options available are:
•
0-10 VDC Voltage Signal
•
2-10 VDC Voltage Signal
Allow Box Heat With AHU Heat
If the box you are using has Reheat or Auxiliary Heat, confi gur-
ing this setting to 1=Yes will allow the box Heat to operate at
the same time as the HVAC unit Heat. Options available are:
•
No
•
Yes
Multiple Daily Setpoints/Schedules
By clicking on the “Use Schedule Space Setpoints” box, in the
Prism Setpoints/Confi guration screen, you can set up to 5 Tem-
perature Setpoint periods in a 24 hour period. You can select a
Cooling and Heating Setpoint for the period from Midnight to the
fi rst event, then diff erent setpoints from the fi rst event to second
event, then the second event to third event, then the third event to
fourth event, and fi nally from the fourth event to midnight. Each
of the event times and temperatures are confi gurable.
Table 2: Airfl ow K-Factor ( CFM) Requirements
