Operating instructions VAV adjustment tool ZTH-VAV

VAV adjustment and diagnostic tool with

PP interface for Belimo VAV controllers.

Connection via

• Service socket on VAV controller

• MP/PP interface

• Control cabinet

Operating instructions VAV adjustment tool ZTH-VAV

Technical data

Safety notes

Brief description

www.belimo.com

Electrical data Nominal voltage

Power supply range of VAV controller

Power consumption In operation

For wire sizing

Connection Plug socket for Belimo PP interface

Connecting cable

MP/PP interface Communication

VAV controllers VAV-Universal

VAV-Compact

Operation LC display

Buttons

Quick start guide

Safety / tests Protection class

EMC

Operating temperature

Storage conditions

Dimensions / weight Dimensions

Weight

From VAV controller, AC 24 V, 50/60 Hz / DC 24 V

AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V

1 W

2 VA

RJ12 socket

See page 6

PP, no MP operation

VRD2, VRD3, VRP-M (VAV & STP)

NMV-D2, LMV-D2M, NMV-D2M

LMV-D2-MP, NMV-D2-MP, SMV-D2-MP,

LHV-D2-MP

LMV-D2LON, NMV-D2LON

2 x 16 characters with backlighting

▼ / ▲ / – / + / OK

Included, en/de

III Safety extra-low voltage

CE according to 89/336/EEC

0 ... 50°C, non-condensing

–20 ... 50°C, non-condensing

See page 8

Approx. 260 g

!

• The device is not allowed to be used outside the specified field of application, especially in aircraft or in any other airborne means of transport.

• Only suitable for connection to Belimo VAV devices with 24 V safety extra-low voltage and a

PP/MP interface.

Applications The ZTH-VAV adjustment tool enables VAV and CAV systems to be tested efficiently. Systems equipped with Belimo VAV controllers can be easily adjusted to individual room and user requirements.

Can be used with: available since:

VAV-Universal VRD2, VRD2-L

VAV-Universal VRD3 1)

VAV-Universal VRP-M [VAV and STP (pressure application)]

VAV-Compact NMV-D2

VAV-Compact LMV-D2M, NMV-D2M

VAV-Compact LMV-D2-MP, NMV-D2-MP, SMV-D2-MP, LHV-D2-MP

VAV-Compact LMV-D2LON, NMV-D2LON

1) Requires ZTH-VAV Firmware V1.02 or higher

1992–2007 from 2008 from 2005

1992–2000

2000–2006

2006

2006

T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes 1 / 8

ZTH-VAV Operating instructions VAV adjustment tool

Brief description

Connection and supply

(Continued)

Stand-alone operation:

The tool can be connected and supplied using the service socket on the VAV controller or the connecting terminals.

Bus operation:

If the ZTH-VAV is connected to the local service socket, it can be used to test the following devices without interrupting the bus: VAV-Compact L/N/SMV-D2-MP and L/NMV-D2LON.

The MP-Bus must be disconnected in order to test the VRP-M and L/NMV-D2M when the service socket is used.

Limitation

The tool cannot be directly connected in an MP network or via an MP-Bus master.

ZTH-VAV

▲ ▼ – + OK

ZTH-VAV

▲ ▼ – + OK

MP6 MP6

MP7 MP7

MP1 MP1

MP4

MP8

MP5

MP3

MP-Master

MP4

MP8

MP5

MP3

MP-Master

MP2 MP2

Operating instructions

Compatibility

Connection

These operating instructions describe handling of the ZTH-VAV adjustment tool. For a detailed description of VAV controllers, please refer to the separate product documentation, which can be downloaded from www.belimo.eu ¦ Documentation ¦ Room & System Solutions.

A quick start guide in English and German is included with the ZTH-VAV as a sticker that can be affixed to the rear of the device.

The ZTH-VAV adjustment tool supersedes the old ZEV adjustment tool (1992–2007).

All standard Belimo VAV controllers with integrated PP communication that are sold in EU countries (from 1992) can be adjusted using the ZTH-VAV.

Belimo Automation AG reserves the right to make changes or improvements at any time without prior notice. The latest version of these operating instructions is published on our website: www.

belimo.eu.

See page 6.

Operation

Buttons, display LC display, 2 x 16 characters with backlighting

▼▲ Scroll up / down, cancel

– + Change value

OK Confirm

RJ12 connection:

PP / 24 V

See page 6

Device rear, quick start guide A quick start guide in English and German is included with the

ZTH-VAV as a sticker that can be affixed to the rear of the device.

Contents:

– Connection

– Overview of types

– Access to Configuration menu

– Operating menu with navigation tree

2 / 8 T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes www.belimo.com

ZTH-VAV

Operation

Operating instructions VAV adjustment tool

Configuration menu

(Continued)

You can set the language and the volumetric flow units in the Configuration menu.

The settings are stored.

Start Configuration menu

Action: Keep the (OK) button pressed while you connect the tool to the VAV controller.

Reaction:

Continue with:

Exit:

«Configuration menu» appears on the display

(▼ ▲) buttons

Menu option «leave config-menu» or disconnect cable

Device ID

Options

Operating menu – overview

Text

Units

Supply

MP tester

Expert Mode

German * / English m 3 /h *, l/s, cfm

AC 24 V

0 */ 1

AV 24 V voltage indication, refer to page 7 for an explanation

MP-Bus level tester MP-Bus diagnostic tool for system integrators

The MP tester is not included in this documentation.

Activates mode switching,

Restores original  min

/  max

values

Advanced Mode 0 */ 1 Activates the direction-of-rotation setting

* Default

The operating menu adapts to the functionality of the connected VAV controller. Options that are not relevant are not shown.

Controller type

Position Adress

Serial no.

Controller type

Firmware version

OK

+

VAV controller

Explanation

Menu

Actual volumetric flow / pressure

Setpoint volumetric flow / pressure

Actual differential pressure

Damper position

Select CAV step

Change mode 0 … 10 / 2 … 10 V

Restore  min

/  max

defaults

 min

setting

 max

setting

 nom

setting on VAV unit

∆p @  nom

Legend

Change values, write

Configuration, Expert mode must be active

Displayed value

Display in %, Pa

Not possible

%

%

1)

Pa Pa

%

%

Pa

1)

Pa

Pa

Pa %

Pa %

Pa

% Pa

1) only with VRP-M V3.x

– +

– +

OK

OK www.belimo.com

T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes 3 / 8

ZTH-VAV Operating instructions VAV adjustment tool

Operation

Device identification

(Read only)

Note

Only characters in the ISO-8859-1 character table are supported.

(Continued)

As soon as the ZTH-VAV is connected to a VAV controller, the display shows the version number and then a device ID containing the following information:

• Type

• Position

Type of the connected VAV controller, e.g. LMV-D2-MP

Text string programmed with the PC-Tool, e.g. system designation

Press (OK) to display the following additional information:

• Adress

• Serial no.

PP or MP1...8 (no addresses are supported by VRD2 / NMV-D2; display: ?)

Unique, 16-character serial number

Press (+) to display the firmware version in addition to the type. This function is not supported by the NMV-D2 or VRD2.

Functions

Actual volumetric flow

(read only)

(0 … 100 %  nom

)

Reference signal w [V]

0

10

8

2 4

Setpoint

(reference signal)

6

 max

8 10 [V]

 nom

6

4

2

Actual volumetric flow signal U5

Note

For a detailed description of these functions, please refer to the separate documentation for the

VAV controllers concerned.

Visit www.belimo.com or contact your local Belimo representative.

0

Example

Mode 0 ... 10 V

0 20 40 60 80

 min

The volumetric flow is indicated relative to the  nom

setting.

100

Volumetric flow [%  nom

]

Setpoint

(Read only)

(CLOSE,  min

…  max

, OPEN)

Reference signal w [V]

0

10

2 4

8

Setpoint

(reference signal)

6

 max

8

OPEN

10 [V]

 nom

6

Pressure

(Read only)

4

Actual volumetric flow signal U5

2

CLOSE

0

Example

Mode 0 ... 10 V

0 20

 min

40 60 80 100

Volumetric flow [%  nom

]

The setpoint setting range corresponds to  min

...  max

. If a local override function is active, e.g. NMV-D2-MP: CLOSE damper (jumper 1–3), this information is shown with the setpoint.

The pressure is shown instead of the volumetric flow for the VRP-M [STP], in other words a room or air duct pressure application. P nom

, P min

, P max

appear in place of  nom

,  min

,  max

.

The volumetric flow and the differential pressure at the sensor [Pa] are shown for the VRD3 and the VRP-M.

4 / 8 T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes www.belimo.com

ZTH-VAV Operating instructions VAV adjustment tool

Functions

Damper position [0 … 100 %]

(Read only)

[AUTO / CLOSE / OPEN / 

Select CAV step min

/  max

/ STOP]

(Read / write)

(Continued)

The position is shown in the following cases:

– Synchronisation, adaption:

– VAV controller without position feedback 1)

1) VRD2, VRD3, VRP-M with NM24-V-ST)

 max

0%.

0%

(Damper) OPEN

(Motor) Stop

CLOSE

Volumetric flow [%  nom

]

The following operating modes are available

Change mode [0 … 10 / 2 … 10 V]

(Read only)

 min

The CAV steps shown opposite, also referred to as operating modes, can be used to test VAV / CAV units for

L/N/SMV-D2-MP, L/NMV-D2LON, VRD3 and VRP-M. By activating a CAV step, you set the VAV controller to a fixed operating mode. The temporarily selected volumetric flow setpoint is indicated in the setpoint display.

If the ZTH-VAV is disconnected from the VAV controller, the controller is reset to automatic mode (control function) within two minutes.

Step Function

AUTO Setpoint of input 3 (w/y) or MP master active

CLOSE Damper closes

OPEN Damper opens

 min

 max

Controller operates with volumetric flow 

Controller operates with volumetric flow 

STOP Damper stops in current position min max

Control function

VAV or CAV mode

No control mode

No control mode

CAV mode  min

CAV mode  max

No control mode

Available with

VRD3, VRP-M xMV-D2-MP xMV-D2LON

The mode function can be used to adapt the setpoint input and the actual value output signal to the application or controller.

Note:

By changing the mode, you change the operating behaviour of the VAV controller. The mode should therefore only be changed if absolutely necessary and only by suitably trained personnel.

Restore  min

/ max

defaults

[yes / no]

(Write)

Operating volumetric flow  min

[0 … 100 %  nom

(Read / write)

]

Note

In order to change the  min

/ max

setting of a

VRD3, both potentiometers must be in the Tool position. If this is not the case, it is only possible to display the parameters with the ZTH-VRD3.

Refer to the VRD3 product documentation, www.

belimo.com.

The original  min

/ max

values set by the unit manufacturer (OEM) are restored.

All values set in the meantime are overwritten by the original values.

 min

input in percent [

– Old VAV devices 1)

– New VAV devices

:

2) : nom

setting 0 m 3 /h, l/s] for as a percentage of  max as a percentage of  nom

The ZTH-VAV detects the  min

reference of the connected controller and displays it accordingly.

1)

VRD2, VRP-M up to V2.16, NMV-D2, L/NMV-D2M

2) VRD3, VRP-M from V3.x, L/N/SMV-D2-MP, L/NMV-D2LON

Minimum setting limit *) Oversizing of the VAV units can make control more difficult in the lowest differential pressure range. A minimum volumetric flow, usually corresponding to a differential pressure of ~2 ... 5 Pa, is therefore specified for these units by the manufacturer.

Functional restrictions in this range can be avoided by complying with the unit manufacturer‘s volumetric flow setting.

 min

setting 0 m 3 /h or 0% If the damper needs to be shut off by means of a 0.0 V setpoint signal in VAV mode, this can be achieved by setting  min

0 m 3 /h or 0 %.

Operating volumetric flow 

[30 … 100 %  max nom

(Read / write)

] www.belimo.com

T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes 5 / 8

ZTH-VAV Operating instructions VAV adjustment tool

Functions

 nom

setting on the VAV unit

(Read only)

Note

The VRD2, VRD3 and NMV-D2 do not support the display of  nom

as absolut value.  nom

equals to 100%.

∆p @  nom

(Read only)

VAV-Compact L/N/SMV-D2-MP:

«Open Loop» mode

(Continued)

When the VAV unit is calibrated, the unit manufacturer stores a displayed value in m 3 /h or l/s for the differential pressure at  nom

. This value is used to indicate the actual volumetric flow on a display unit or on the higher-level control system of a bus system.

If no displayed value for  nom

is stored for the VAV controller (ZTH-VAV ¦  nom

: 100%), the operating volumetric flow values  min

and  max

are shown and entered in percent.

This parameter describes the pressure difference (Pa) at nominal volumetric flow  nom

, measured to the D3 sensor.

The ∆p @  nom

parameter is set by the VAV unit manufacturer when the unit is calibrated and cannot be altered by the user.

If a VAV-Compact is programmed as an open-loop controller, VAV control is deactivated. In this case, the Compact device acts as a remote actuator and sensor unit for an external VAV controller.

– The actual volumetric flow and the damper position are indicated correctly.

– It only makes sense to display the setpoint in this application, however, if  nom

is set to 0 m 3 /h or l/s, i.e. display ZTH-VAV ¦  nom

: 100%.

Connection

Local service socket

Connection to

L/N/SMV-D2-MP

L/NMV-D2LON

L/NMV-D2M, CR24

VRP-M

Cable type and order designation

ZK1-GEN Included with ZTH-VAV

ZK1-VAV

ZK4-GEN

Accessory

Accessory

ZK4-GEN

Blue

1

2

3

5

GND

~ / +

PP

VRD3 ZK6-GEN Accessory

Connecting terminals

Cable type and order designation Connection to

L/N/SMV-D2-MP

L/NMV-D2LON

L/NMV-D2M

NMV-D2, VRD2

VRD3, VRP-M

ZK2-GEN

White

Blue

Turqu.

1

2

3

5

GND

~ / +

PP

White

Blue

Turqu.

1

2

3

4

GND

~ / +

PP

ZK2-GEN wiring assignment

PP (Turqu.)

+ / ~ (Blue)

GND (White)

6

4

5

3

2

1

ZK2-GEN

ZTH-VAV

5

6

4

3

2

1

PP

+ / ~

GND

6 / 8 T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes www.belimo.com

ZTH-VAV Operating instructions VAV adjustment tool

Supply voltage test for VAV controllers (AC/DC 24 V)

Safety notes

The ZTH-VAV must only be used to test

AC 24 V supply voltages (III safety extra-low voltage) downstream of a safety isolation transformer. The measurement/use for this purpose is only permitted in conjunction with a

Belimo VAV controller.

All other forms of use are prohibited!

!

Maximum measuring voltage

Maximum measuring voltage AC 30 V / DC 42 V.

Higher voltage levels are liable to damage the device beyond repair!

The ZTH-VAV can be used to test the AC 24 V supply voltage of the VAV controllers in conjunction with the ZK2-GEN connecting cable.

Measuring the AC 24 V supply voltage with the ZTH-VAV helps pinpoint the cause of a malfunction, e.g. when the system is started up.

To test the supply voltage Equipment:

Connection:

Start:

Exit:

ZTH-VAV, ZK2-GEN

– Connect the free wires of the ZK2-GEN to AC 24 V.

• White to GND (terminal 1 on the VAV controller)

• Blue to ~ (terminal 2 on the VAV controller)

• Do not connect the third wire (turquoise)

– Do not connect the RJ11 plug to the ZTH-VAV for the time being!

– Keep the (OK) button pressed while you connect the ZTH-VAV to the VAV controller

– Using the arrow key (▼) select «Supply»

Disconnect the ZTH-VAV from the VAV controller or select «leave config-menu» (Set)

Display format

Supply

AC 24 V VHW: okay

88%

Supply voltage quality

Half-wave ratio (only indicated for AC 24 V)

Measured AC or DC value in volts

Supply

AC 25 V

AC voltage (AC 24 V)

VHW: okay

88%

Quality: okay: AC supply in the range from 19.2 to 28.8 V

AC value: Measured AC voltage (accuracy: ±1.0 V, if VHW >95%)

VHW: Ratio of the positive half-wave to the negative half-wave

The difference between the positive half-wave value and the negative half-wave value must not be too large.

Rule of thumb: Pos. HW / neg. HW x 100 must not be >80%.

Explanation of VHW

AC 24 V supply

In practice, most field and control devices use half-wave rectifiers for their internal supply voltage.

• Advantage: Straightforward wiring and connections.

• Disadvantage: Only the positive half-wave is loaded.

Standard voltmeters always indicate the effective value for both half-waves.

The determining value for each of the two halfwaves can only be indicated on an oscilloscope or the ZTH.

21.2 V

VAC p n

U pos. half-wave neg. half-wave

Potential problems

The half-wave load is influenced if:

• The transformer is too small

• The cable between the transformer and the VAV controller is too long

DC voltage (DC 24 V) A voltmeter should be used to test a DC 24 V installation.

..

..

..

Restriction The supply voltage cannot be tested if the ZTH-VAV is connected to the service socket of the

VAV or CR24 controller (transformed DC voltage).

www.belimo.com

T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes 7 / 8

ZTH-VAV

Accessories

Operating instructions VAV adjustment tool

Dimensions [mm]

Dimensional diagrams

Cable type and order designation Compatible with

ZK1-GEN

• LMV-D2-MP, LHV-D2-MP

• NMV-D2-MP

• SMV-D2-MP

• LMV-D2LON, NMV-D2LON

ZK1-VAV

• LMV-D2M

• NMV-D2M

• CR24-B1/B2/B3

ZK2-GEN

Remarks

Included with ZTH-VAV

1)

All VAV controllers connected via connecting terminals

1)

1) weiss blau türkis

Stecker 3-polig

ZK4-GEN VRP-M blaue Ader

GND

~ / +

PP

24 V

~ / +

1)

ZK6-GEN VRD3

1) Available as accessories

85 23

Headquarters

BELIMO Holding AG

Brunnenbachstrasse 1

CH-8340 Hinwil

Tel. +41 (0)43 843 61 11

Fax +41 (0)43 843 62 68 [email protected]

www.belimo.com

8 / 8

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T4-ZTH-VAV • en • v1.2 • 03.2009 • Subject to changes

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