Belimo VRD3-RE2-SET Manuale di installazione - Pagina 8

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VAV-Universal Retrofit-Set
Setting and first commissioning (continued)
min
[Potentiometer or Tool (PP command)]
Note concerning difference 
min
VRD2
The adjustment range of the operating mode 
with:
– VRD2 refers to 0 ... 100% of 
max
– VRD3 refers to 0 ... 100% of 
nom
The 
setting of the VRD3 thus behaves in
min
compatible fashion with the new VAV generation
(starting with 200), i.e. VAV-Compact L/N/SMV-
D2-MP, VRP-M.
VRD3-RE2 setting with VAV adjustment tool ZTH-VAV
Operating menu VRD3-RE2
8 / 9
Installation
Die operating volumetric flow settings 
/ 
setting
max
VRD3-RE2:
a) directly on the adjustment potentiometer (analogous to the VRD2)
0 ... 100% of 
min
30 ... 100% of 
max
b) with VAV adjustment tool ZTH-VAV (PP command)
To write a value – with PP command - into the VRD3-RE2 both of the potentiometers 
must be at the Tool position. If the potentiometer(s) is/are set to «Tool» with ZTH-VAV
max
connected , then the menu may under certain circumstances need to be refreshed through
actuation of the ↑↓ keys. For function, see following illustration:
Adjustment potentiometer 
20
10
0
VRD3
setting VRD3,
min
Automatic adjustment via
potentiometer position
Potentiometer:
– Tool: ZTH value
– 0 ... 100%: Potentiometer value active
The 
value must always be set higher than the 
max
controller will operate with the 
The entire BELIMO product range with PP connection can be set and controlled with the VAV
adjustment tool ZTH-VAV. The connection to the VRD3-RE2 is provided by the RJ «Service»
socket or at the PP connection (terminal 4), e.g. in the control cabinet.
Option
Volumetric flow – actual
value
Volumetric flow - setpoint
Current pressure value
Specify CAV steps
Mode
min
max
nom
∆p @ 
* Function is displayed, starting with ZTH-VAV Firmware V1.02 or higher (starting 0.2008).
See also Release Note ZTH-VAV, www.belimo.eu
M4-VAV-Universal Retrofit Set • en • v1.1 • 04.2011 • Subject to changes
min
nom
nom
/
min
max
40 50
60
30
70
80
90
100
parameterised
value
45 %
0 ... 100%
Tool
volume as setpoint in CAV mode.
min
Unit
%
%
Pa
–
–
setting
%
setting
%
VAV box
%
Pa
nom
and 
can be adjusted two different ways on the
max
Tool
ZTH-VAV
▲ ▼ – + OK
ZTH-VAV
r = read
w
r
w = write
(PP)
effective value
45 %
value; otherwise the VRD3-RE2
min
Range/setting
0 ... 100% [of 
]
nom
0 ... 100% [
... 
]
min
max
0 ... 300 Pa
Auto – CLOSED – OPEN – 
–
– Stop
max
0 ... 10V, 2 ... 10V
0 ... 100% [of 
]
nom
30 ... 100% [of 
]
nom
Nominal setting = 100%
differential pressure pending with
nom
and
min
Function
Commissioning,
Service function
min
Settings,
modifications
OEM setting
www.belimo.eu