Saf Set-Up - Daikin MicroTech III Operation Manuals

SAF Set-up

Table 21: Supply Fan Speed Menu
Item Display Name Default Setting
SAF Ctrl= DSP
AplyInputChgs= No
CO Input= None
2
CFM Input= None
BSP Input= No
SPEED CONTROL
Rem SAF Cap= 33%
DSP CONTROL
DSP DB= 0 .1in
SAF Ramp Time= 60s
Min Period= 5s
Max Spd Chg= 15%
DuctPress1= —
1 ZONE VAV CONTROL
Min Clg Spd= 40%
Max Clg Spd= 100%
Min Htg Spd= 40%
Max Htg Spd= 100%
Space Period= 60s
Space Gain= 0 .8
Space PAT= 400s
Space Max Chg= 10%
SAF Ctrl is an adjustable parameter used to select how the
supply fan is to be controlled . The supply fan can normally be
controlled by duct pressure, space temperature (single zone
VAV or 1ZnVAV) or by a percentage of supply air fan speed
from 33% to 100% . On 100% OA unit applications the fan can
be controlled to maintain building static pressure, space carbon
dioxide level or and airflow based on a field supply airflow
station . The speed option is typically used with a building
automation system . When single zone VAV control is selected,
the supply fan is controlled with a PI_Loop to maintain the
Control Temperature input at the Occupied Cooling Set Point or
Occupied Heating Set Point . When BSP is selected the supply
fan is controlled with a PI_Loop to maintain the building static
pressure at a building static pressure Set Point .
When CO is selected the supply fan is controlled to maintain
2
the CO ppm between adjustable limits by varying the supply
2
fan speed between an adjustable range. When CFM is
selected the supply fan is controlled with a PI_Loop to maintain
the measured CFM at a CFM set point .
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Range Password Level
DSP
Spd/Net
1ZnVAV
4
BSP
CO2
CFM
No
2
Yes
None
VDC 2
MA
None
VDC 2
MA
No
2
Yes
0–100% 4
0–0 .5in 4
0–999s 4
0–999s 4
0–100% 4
0 .0–5 .0in 2
0–100% 4
0–100% 4
0–100% 4
0–100% 4
0–999s 4
0 .0–100 .0s 4
0–999s 4
0–100% 4
35
Item Display Name Default Setting
CO
2
Min PPM= 0ppm
Max PPM= 2000ppm
V/A @ Min PPM= 0 .0/V
V/A @ Max PPM= 10 .0/V
Min SAF PPM= 800
Max SAF PPM= 1100
Min PPM Spd= 50
Max PPM Spd= 100
CFM CONTROL
Min CFM= 0CFM
Max CFM= 10000CFM
V/A @Min CFM= 0 .0/V
V/A @Max CFM= 10 .0/V
SAF CFM DB= 3%
SAFCFM Period= 30s
SAF CFM Gain= 0 .1
SAF CFM MxChg= 5%
BSP CONTROL
BSP DB= 0 .01in
BSP Period= 5s
BSP Gain= 0 .2
Max Spd Chg= 4%
SAF SETUP
SAF Ctrl Dly= 30s
Min Speed= 33%
VAVBox Out= —
MaxVentSpd= 100%
Max SAF RPM= 2600
AplyInputChgs is the Apply Input Changes flag must be
changed from no to yes in order for the controller to recognize
the changes. Setting the Apply Input Changes flag to YES will
automatically reset the controller .
CO Input is an adjustable item used to select the type of
2
input for a field installed CO
controller ignores any CO sensor input . If CO
2
or monitoring is desired this parameter is set to VDC or mA
to match the input type of the field supplied CO
This parameter applies only to 100% OA unit configurations.
CFM Input is an adjustable item used to select the type of
input for a field installed airflow station. If this is set to None the
controller ignores any field airflow station input. If CFM control
and/or monitoring is desired this parameter is set to VDC or mA
to match the input type of the field supplied airflow input. This
parameter applies only to 100% OA unit configurations.
OM 920-6 • MICROTECH UNIT CONTROLLER
M d
enu esCrIpTIons
Range Password Level
CONTROL
0–5000ppm
0–5000ppm
0 .0–20 .0/V/mA
0 .0–20 .0/V/mA
0–5000ppm
0–5000ppm
0–100%
0–100%
0–60000CFM
0–60000CFM
0 .0–20 .0/V/mA
0 .0–20 .0/V/mA
0–100%
0–999s
0 .0–100 .0
0–100%
0 .0–0 .1in
0–999s
0 .0–100 .0s
0–100%
0–999s
0–100%
Heat
Cool
0–100%
0–5000
sensor . If this is set to None the
2
control and/
2
sensor input .
2
2
2
2
2
4
4
4
4
2
2
2
2
4
4
4
4
4
4
4
4
4
4
2
2
2