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By monitoring the pressure drop over the inlet ring of both fans, the unit control can calculate the airflow moved by each fan using a technique based
on the Bernoulli and continuity equations. The unit control will modulate the analog output sent to each EC fan motor in order to maintain a given
airflow set point. Follow the steps below to enter the airflow set points of the supply and exhaust air fans.

Airflow control (CAV & airflow set points)

1 Air Control

Go to

Air control

by using the UP/DOWN arrow buttons. Select by

pressing the RIGHT arrow button

Temperature

→

Air Control

Time settings

Access Rights

2 Flow Control SAF

From this submenu, the actual supply airflow measured is displayed

along with the set point for the current unit operation mode. Press the

RIGHT arrow button to access the next submenu.

Flow control SAF

Actual: CFM

Setp:

CFM

3 Flow Control SAF

From this submenu, the set points for normal speed (1/1) and reduced

speed (1/2) for the supply air fan can be entered. Press the OK button to

access the field, use the arrow buttons to set a value and press ok again

to save the value.

Flow control SAF

Step 1/1:

CFM

Setp 1/2:

CFM

4 Flow Control EAF

The same can be done for the exhaust air flow. Locate Flow control EAF

from the air control menu and enter the EAF set points.

Flow control EAF

Actual: CFM

Setp:

CFM

Flow control EAF

Step 1/1:

CFM

Setp 1/2:

CFM

The airflow read on the unit external display is accurate to +/-5% of the measured value in a laboratory setting. According to the Field
Performance Measurements of Fan Systems published by AMCA (AMCA 203-90), airflow field measurements typically have an uncertainty
of up to 10%. If you are unsure of what is acceptable in your application, we recommend you contact a qualified air tester & balancer in your
area.

The unit controller has a year-based 24h clock function. This means that a weekly schedule with holiday periods for a full year can be set. The clock
also has an automatic daylight saving time change-over. To set the date and time follow the steps below.

Time settings & schedule

1 Time settings

Go to

Time settings

by using the UP/DOWN arrow buttons. Select

by pressing the RIGHT arrow button

Temperature

Air Control

→Time settings

Access Rights

2 Time/Date

Go to

Time/Date

by using the UP/DOWN arrow buttons. Select by

pressing the RIGHT arrow button

→Time/Date

Timer normal speed

Timer reduced speed

Extended running

3 Time/Date

Press the OK button to access the field, use the arrow buttons to set

a value and press ok again to save the value. Note the time parameter

format is 00:00 to 24:00

Time: HH:MM

Date: YYYY-MM-DD

Weekday: Sunday-Monday

Once the date and time has been set, schedules can be programmed to operate the unit in normal or reduced speed. While the normal speed schedule
is active, the unit will run at the desired airflow set point (setp 1/1). The reduced speed schedule can be used for when a reduced airflow set point
(setp 1/2) is desired during night, weekends or holidays for example. The normal speed schedule has precedence over the reduced speed schedule.

Each schedule has two (2) run periods that can be set per day (i.e. run from period 1, 06:00-11:00 and from period 2, 13:00-21:00). If both periods
for a weekday are set to 00:00-00:00 then the schedule for this day will be inactive. If either period for a weekday is set to 00:00-24:00 then the
schedule will be active all day.

To set an operation schedule follow the steps below.

1 Timer normal speed

Access the timer normal speed submenu from the time settings menu.

Use the UP/DOWN arrows to toggle between weekdays. Press the OK

button to access the field, use the arrow buttons to set a value and

press ok again to save the value. Note that the time parameter format is

00:00 to 24:00

Normal speed

Monday

Per1: HH:MM-HH:MM

Per2: HH:MM-HH:MM

2 Timer reduced speed