FläktGroup ECONOVENT PUMZ-20 Installation guide

Brand: FläktGroup

Model: ECONOVENT PUMZ-20

Type: Installation guide

INSTRUCTION FOR SPEED DETECTOR

ROTARY HEAT EXCHANGER

PUMZ -20

Mounting- and Electrical Installation

FläktGroup DC_4498GB 20180419_R0 Specifications are subject to change without further notice

DELIVERY

If the heat exchanger has been ordered with a speed detector,

the parts shown in Fig.3 will be fitted at the factory.

The alarm relay shown in Fig. 1 is delivered separately.

PUMZ-20-2-1 alarm relay

For constant speed only.

PUMZ-20-b-c magnet and speed sensor

The delivery includes an angle bracket, screws for the bracket

and the magnets.

FITTING

(applicable when the speed detector is ordered afterwards)

A. Fit the magnet(s) included in the delivery to the rim plates of

the rotor. On the larger sizes, locate the 2 magnets 5 mm

apart, in line along the periphery of the rotor, see Fig. 3.

Fitting sequence: Remove the lower inspection cover, turn

the rotor which has the largest radial run-out. Secure the

magnet in position adjacent o the right-hand clamping strap.

Ensure that magnetic pulse sensor GS2 is well clear of the

clamping strap joints.

B. Fit the impulse sensor to the mounting bracket and locate

the bracket to the casing partition (see Fig. 4). Locate the

mounting bracket so that the distance between the sensor

and the magnet will not exceed 3-5 mm (see Fig. 3). Secure

the mounting bracket in the cross piece by means of two

self-threading screws.

C. Now check the distance between the pulse sensor and the

magnet(s) (up to 3-5 mm). Adjust if necessary.

PUMZ-20 SPEED DETECTOR

Fig. 2

Fig. 4

Fig. 3

Fig. 1

Alarm indicating

lamp (lights up

in the event of

an alarm

PUMZ-20

alarm relay

Test/operation

selector switch.

Alarm delay of

20 s/180 s

Operation indicating

lamp (extinguished

when the magnet is

in line with the sen-

sor)

Relay base

EURZ 3

ø15



GS1 Impulse sensor

Magnet(s)

Important!

Units up to and including size 240 have only

one magnet where as the larger sizes have

two magnets.

5 mm

max. 3 mm

EURZ 2



EURZ 4

Brusch seal

Magnet(s)

Mounting

bracket

max 3-5 mm

Mounting- and Electrical Installation

FläktGroup DC_4498GB 20180419_R0 Specifications are subject to change without further notice

ELECTRICAL INSTALLATION AND OPERATION

(the electrical installation work should be carried out by an

authorized electrician)

Constant speed - relay

A alarm will be initiated if the time between two pulses 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 reset automatically when the time between

pulses has decreased to less than 3 min.

Alarm relay with operation indicating lamp (green), alarm lamp

(red) and one pair of potential-free change-over contacts. The

relay is mounted on a base. The contact rating for a resistive

load is 5 A at 220 V.

Activation pulse duration: at least 0.02 s.

Alarm outputs:

1–4 circuit closed

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

B) If the logic input is closed

C) After the power supply has been switched on (3 min.) 1–3

circuit closed

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

B) On a loss in power supply

Auxiliary contacts in the drive motor contactor, which interlock

the alarm when the heat exchanger is not running. Alternative

connection of the same control signal as that used for the speed

controller (a control signal below 4 V interlocks the alarm).

GS1 Impulse sensor

Max. sensing distance: 3-5 mm, see below. Max. avkännings-

avstånd: 3-5 mm, se fig. nedan.

EXAMPLE OF ALARM INTERLOCK CONNECTION

The alarm is interlocked across the auxiliary contacts of the

drive motor contactor.

Variable speed

AS2 Control unit (EMS)

Magnetic speed sensor

X3 Terminal blocks in 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: 5 A at 30 V.

Fit the pulse sensor and magnets as described on page 1.

Connect the magnetic speed sensor to the speed controller as

shown in the diagram above.

Disconnect the jumper between terminals 2 and 13. An alarm

will be initiated about 22 minutes after the last occasion when

the magnet has passed the magnetic pulse sensor.

The alarm is interlocked when the heat exchanger is out of

operation.

To reset the alarm, switch off the power supply to the speed

controller for 2-3 seconds.

PUMZ-20 SPEED DETECTOR

max. 3 mm

1–4

1–3

GS1

220 V ~

24 21 22

34 14

31 11 A1

32 12

10 2

11 1

Magnet

Alarm relay and relay base

Auxiliary contacts in

the drive motor

contactor

Alarm output

max 3-5 mm

GS-1

220V ~

1-3

1-4

Fig. 5

Fig. 6

102

Alarm relay

Auxiliary contacts in

the drive motor contactor

Alarm output Indicating lamp

213141718

AS2

max. 3 mm

GS1

Jumper that should be

removed with the speed

detector is connected

max 3-5 mm

GS-1

Magnet

X3 X7

Fig. 7

AS2

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AND RELIABILITY

With more than a century of accumulated industry experience, FläktGroup is

in a unique position to deliver energy efﬁcient components and solutions for

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FläktGroup ECONOVENT PUMZ-20 Installation guide

FläktGroup ECONOVENT PUMZ-20 Installation guide

FläktGroup ECONOVENT PUMZ-20 Installation guide

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