Revised Date: 2018/04/24
10
2. Fan Controls:
(1)
Fan Output Adjustment
: Fan output can be set to minimum adjustment (
AO2 Low(E7)
) from 0-5 Vdc and to
maximum adjustment (
AO2 High(E8)
) from 5 to 10 Vdc
These two values are adjusted by balancing contractor that will measure minimum and maximum CFM the fan will
supply and set this two values.
(2)
Fan Control
:
Fan should have option to run continuously at low speed (
Fan Low(E17))
(say 25-30% of max
design airflow) during occupied and dead band for delivery outside air from suite HRV or OA vent duct
If there is a call for heating or cooling the fan would ramp up to maximum design airflow for the FCU on the project.
(3)
Fan Mode
: By pressing FAN button to toggle AUTO icon on and off to represent
Auto Mode (“AUTO” show on
screen)
and
Continuous Mode
.
Continuous Mode
will keep fan running at pre-set minimum speed all time while
Auto Mode
will run from 0%. During dead band,
Auto Mode
will stop the fan while
Continuous Mode
will run the fan
at low speed as set in (
Fan Low(E17))
.
By pressing POWER button it will switch on/ off fan and heating/ cooling outputs to there default positions.
VDC
AO2 High
AO2 Low
10
0
100%
Fan Low
Fan Med
