Function

VAV Compact D3

VAV Compact D2

Application

Pressure-independent control of CAV/VAV units in the comfort zone

Control function

VAV and CAV units

Control characteristics

PI control

Sensor

Integrated dynamic differential pressure sensor

-Sensor type

D3 sensor, calorimeter

D2 sensor, thermo-anemometer

-Measurement range

~0.5…600Pa

2…300Pa

-Warm-up time of sensor element

~10s

> 15min

-Pressure display

ZTH-GEN / PC-Tool

None

-Adjustment to V'nom parameter

Δp@V'nom [Pa] / V'nom [m3/h / l/s / cfm]

Calibration value [1500…7000] V'nom [m3/h / l/s / cfm]

VAV / CAV control signal

-VAV: Mode 0…10V

V'min…V'max

Mode 2…10V

0V = closed / V'min…V'max

0V = closed / V'min…V'max

Shut-off level (2…10V)

0.1 (default) / 0.5V selectable

0.1V fixed

-CAV: Input w (3)

CLOSED / V'min / V'max / OPEN V'mid fixed 50%

CLOSED / V'min / V'max / OPEN V'mid adjustable

-U5 feedback signal

0…100% of

V flow / damper position / Δp

0…100% of

V flow / damper position

Operating volumetric flow

-V'min range

0…100% V'max

-V'max range

20…100% V'nom

30…100% V'nom

Adjustment tools

-ZTH-VAV

"same" as Compact D2 (no Δp display)

V1.x full support

-ZTH-GEN (starting V4.xx)

full support

full support

-PC-Tools

full support starting V3.6

full support starting V3.1

Wiring connection

"same" as Compact D2

full support

Accuracy

Δp -20…+20Pa à +/-1Pa

Δp +20…500Pa à +/-5%

~+/-10% (approx.)

Dimensions

"same" as Compact D2

full support