FläktGroup EURZ-02 Speed detector Installation guide

Brand: FläktGroup

Model: EURZ-02 Speed detector

Type: Installation guide

Fläkt Woods 3218 GB 03.12 1 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

EURZ-02-b Speed detector

Delivery

If the heat exchanger is ordered with speed detector, the

parts shown in Fig. 4 will be fitted at the factory. The

alarm relay shown in Fig. 1 is delivered separately.

EURZ-02-1 Alarm relay

For constant speed only.

1 EURZ-02-01 Alarm relay

2 Operation indication (off when the magnet is

opposite the sensor)

3 Test/run switch

Alarm delay 20 s / 180 s

4 Alarm indication (lit in the event of an alarm)

Fig. 1

1 Alarm relay with operation indicating lamp (green), alarm lamp (red) and

one pair of potential-free change-over contacts. The Contact rating for a

resistive load: 220 V, 5 A. The activation pulse duration: at least 0.02 s.

5 The magnet is included in the EURZ-02-2.

6 Alarm output:

5 – 6 contacts closed

A) When the relay is energised (< 3 min. between pulses).

B) If the logic input is closed.

C) After the power supply has been switched on (3 min.).

5 – 4 contacts closed

A) In the event of an alarm (> 3 min. between pulses)

B) On a loss of power supply

7Auxiliary contacts in the drive motor contactor which interlock the alarm

when the heat exchanger is not in operation.

8Indicating lamp

9EURZ-02-2 Pulse sensor

Electrical installation and operation

(the electrical installation work should be

carried out by an authorised electrician)

Constant speed

An alarm will be initiated if the pulse interval is longer

than 3 min. (even if the magnet has stopped opposite the

pulse sensor).

The alarm will be interlocked if the logic input of the

relay is closed.

The alarm will be automatically reset when the pulse

interval has decreased to less than 3 min.

Example of alarm interlock connection

The alarm is interlocked across the auxiliary contacts of

the drive motor contactor.

Fig. 3

230 VAC

–+

234

ALARM

5 6

7891011 12

Fig. 2

Pulse sensor

Speed detector

EURZ-02-b Speed detector

Fläkt Woods 3218 GB 03.12 2 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Magnet and EURZ-02-2 Pulse sensor

for constant and variable speed operation

Fig. 4

60 70

GS1

Fitting

(Applicable if the speed sensor has been ordered separately)

A. Fit the magnet(s) to rotor. If there are two magnets fit

them 5 mm apart as shown in Fig. 5.

Use a center punch to make a pilot hole in the rotor

structure. For dimension and location, see Fig. 5.

Then secure the magnet(s) by means of glue and the

screw supplied.

B. Fit the pulse sensor to the mounting bracket and then

secure the bracket on the inside of the panel as shown

in Fig. 5.

C. Check that the distance between the sensor and the

magnet(s) is 3–5 mm. Adjust, if necessary.

Variable speed

213141718

AS2

3–5 mm

GS1

Fig. 6

AS2 Control unit (EMS)

Pulse sensor

X3 Terminals on the control unit

X7 Alarm connection. The contacts are potential-free and close when an alarm

is initiated and when the power supply is lost. Contact rating: 30 V, 5 A.

5 1 or 2 magnets

12 Jumper which must be removed if the speed detector is connected.

Fig. 5

GS1 Pulse sensor

51 or 2 magnets

9Bracket for the pulse sensor

10 Screw

~ 20

A–A

3–5 mm

510 9

FläktGroup EURZ-02 Speed detector Installation guide

FläktGroup EURZ-02 Speed detector Installation guide

FläktGroup EURZ-02 Speed detector Installation guide

Related papers

Other documents