Commissioning Instructions

Before You Begin
Setting Override Time
10
Siemens Industry, Inc. Start-up Procedures 140-1020
2015-05-07
Setting Override Time
If using night/unoccupied override, set OVRD TIME to the number of whole hours that
an override should last. If OVRD TIME equals 0 (default), this feature is disabled.
Enabling Wall Switch
If a wall switch is used for day/night (occupied/unoccupied) control, enable it by setting
WALL SWITCH to
YES.
Otherwise, leave WALL SWITCH at its default value of NO.
Setting Fail Mode
In the event that the air velocity sensor ceases to function, FAIL MODE causes the
damper to either
OPEN or CLOSE. Set FAIL MODE to the fail-safe position desired for
the damper.
Setting Duct Area
If provided, enter the duct area (sq ft or sq m) into DUCT AREA and continue to Setting
Flow Coefficient
.
If you do not know the duct area, use the following table:
Area =
Round Duct
Rectangular Duct
Area in Sq. Ft. ( π x R
2
)/144
(
Where: π = 3.14 and R =
radius of duct in inches)
Width x Height/144
(in inches)
Area in Sq. M ( π x R
2
)/10,000
(
Where: π = 3.14 and R =
radius of duct in centimeters)
Width x Height/10,000
(in centimeters)
Setting Flow Coefficient
1. Set FLOW COEFF to the appropriate value found in the following table. This value
is a starting point for the air balancer.
2. To fine tune the flow coefficient use the following formula:
 New Flow Coefficient = (Actual Volume ÷ Controller Volume) × Old Flow
Coefficient
The actual volume is the actual value obtained from the balancer’s
measurements. The controller volume is the value obtained from AIR
VOLUME.
3. If the controller volume is not within 5% of the actual volume, repeat Steps 1 and 2
until it is within 5%.
Box Manufacturer Flow Coefficients
Manufacturer
Sensor Type
Value
Anemostat 2-pipe without orifice
2-pipe with orifice
0.79
0.59