FläktGroup EURC Plate heat exchanger Installation guide

Brand: FläktGroup

Model: EURC Plate heat exchanger

Type: Installation guide

EURC Plate heat exchanger

Fläkt Woods 4069 GB 2008.06 1 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Ordering key

RECUTERM EURC-aa-b-c-d-e-f-g

Plate heat exchanger

Size (aa)

11, 20, 21, 22, 30, 31, 32, 33, 40, 41, 42, 44

Right-hand/left-hand installation alt. (b)

Right-hand version Left-hand version

Fin material (c)

1 = aluminium

2 = epoxy-coated aluminium

Version (d)

0 = without by-pass damper

1 = with by-pass damper

2 = section defrosting

3 = small plate heat exchanger,

by-pass damper (b = 1, 5)

Droplet eliminator, exhaust air (e)

0 = without

1 = with, plastic

Material (f)

1 = galvanized steel

2 = stainless steel

Inspection side (g)

1 = right-hand

2 = left-hand

Location of damper, motor and droplet eliminator

N.B. One water trap for small plate heat exchanger.

1. Shut-off and by-pass damper or section defrosting damper

2. By-pass damper

3. Location of damper motor

4. Drain tray

5. Water trap (not included in the EURC)

Stacked units – Connection to the roof of the

lower unit

Connection to the ducting

Connect the ducts to the heat exchanger in accordance

with the appropriate installation alternative (see adjacent

Ordering key).

Water trap

The heat exchanger is provided with two 32 mm o.d.

drain connections. Connect each of these to its own

EUAZ-08 water trap or an equivalent water trap with a

depth of at least 100 mm (see Fig. 1). Run the pipe from

the water trap without reduction in diameter and with a

continuous slope to a floor gulley. The EUAZ-08 is in-

tended for sub-atmospheric pressure.

= Supply air = Exhaust air

Supply air Exhaust air

EUAZ-08 Water trap

Fig. 1

Fig. 2

b = 1–4 b = 5–8

b = 2, 3, 6, 7

b = 4, 8

EUAZ-16

jointing set

Jointing set

Sheet metal

section sup-

plies

EUAZ-15

EURC Plate heat exchanger

Fläkt Woods 4069 GB 2008.06 2 Specifications are subject to alteration without notice

EU Air Handling Unit INSTALLATION

Damper control

The damper is designed so that the by-pass section and

the shut-off section comprise part of the same damper.

When the by-pass is open, the shut-off section is closed

and vice versa.

Check that the damper closes at its respective limits of

travel.

Shut-off and by-pass dampers (d = 1, 3)

The by-pass and shut-off dampers of the heat exchanger are

mechanically interconnected by means of connecting rods.

As one of the damper closes, the other simultaneously

opens. Check that each damper is closed at the limit of

its travel.

During the summer, the entire supply air flow can be

by-passed across the heat exchanger in order to avoid un-

desirable heat recovery and fouling of the heat exchanger.

Torque required

Connection diagram for the EURC plate heat

exchanger with section defrosting d = 2

Connecting the motor actuator

Fit the actuator motor to the by-pass blade nearest to the

heat exchanger. As an example, a heat exchanger which

has two blades as by-pass section should have the actua-

tor motor fitted to the second shaft viewed from the

inspection side.

Fig. 4

Fig. 3

Section defrosting (d = 2)

The heat exchanger is equipped with a by-pass damper

and a combined defrosting and shut-off valve together

with an actuator, control unit and temperature sensor.

The defrosting and shut-off damper consists of a num-

ber of separately operated dampers. These are located

upstream of the heat exchanger on the outdoor air side.

During the defrosting period, one damper section at a

time closes for 15 minutes.

The by-pass damper is closed. After a complete defros-

ting cycle (1 hour) the heat exchanger reverts to normal

operation for 90 minutes before a new defrosting cycle

starts.

Since only a small part of the heat exchanger is shut off,

the supply air flow rate will be reduced by a maximum of

5–10% during the defrosting period itself. The reduction

in the air flow rate is dependent on the fan type and the

operating point of the fan.

Inspection

side

Axel 15

Shut-off section By-pass section

Blade to which the actuator

motor is fitted

GND

24VAC

0-10VDC

Temp M4 M3 M2 M1

Power

By-pass damper

ST4:1

N.B.: Reverse direction of travel

Section defrosting damper ST4:2

Integral control unit in the motor;

see instruction in the motor cover

Section defrosting damper ST4:3

Section defrosting damper ST4:4

Section defrosting damper ST4:5

Temperature sensor

Dampers ST4:1 –ST4:5 and the temperature sensor are connected

at the factory.

Size 11 20 21 22 30 31 32 33 40 41 42 44

Max.

torque 8 8 10 10 10 11 12 12 11 12 14 16

d = 1

FläktGroup EURC Plate heat exchanger Installation guide

FläktGroup EURC Plate heat exchanger Installation guide

FläktGroup EURC Plate heat exchanger Installation guide

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