Luvata LVD, LVDV 40, LVDV 50 User Manual

GB

Air heater unit LVD

User’s Guide

About Luvata

Luvata is a world-leader in metal fabrication, component manufacturing and related
engineering and design services. We are committed to partnering with our customers
to help them increase their competitiveness. Our products and services enable our
customers to improve operational efficiency, improve products and reduce tied-up
capital. This focus on our customers’ results, backed by our unfailing reliability, makes
us a partner on which our customers base their future development.

General description

The air heater unit consists of a fan, motor and heat
exchanger and it is used to heat air with water. The water
circulates in the air heater unit’s heat exchanger and
heats the air with the help of the fan. The air heater unit
can be  tted with various accessories to control the supply
of heat. Its low external height ensures that it can be
installed in premises with varying roof heights.

www.luvata.com/coiltech1034564 We reserve the right to alter speci cations

SE FI

Translated from the original Swedish version

1034564 We reserve the right to alter speci cations

Air heater unit LVD

GB

2

General

• Always read through the entire User’s Guide before
using the product.

• Always position the air heater unit so that it is not
accessible to unauthorised personnel.

• All work on the air heater unit must be carried out by
quali ed personnel with knowledge of the product and
the applicable safety instructions.

During operation, both the air heater unit and the

air it is blowing out can be hot, which can cause
personal injury.

The air heater unit must not be installed in

environ ments where there is an explosion risk.

Data plate

The data plate is located on one of the sides of the air
heater unit and contains information about:

• Order number

• Product code

• Maximum working temperature

• Maximum working pressure

• Test pressure

• Motor data

• Manufacturer

• Year of manufacture

• Net dry weight

• Fluid volume

Operating pressure

The air heater unit may only be used in a system designed
for its maximum working pressure (MPa) and its maximum
temperature (°C). The values are stated on the air heater
unit’s data plate.

Installation and pipe connections

The air heater unit must be permanently installed. Fasten­ers and brackets must be capable of withstanding the
load of the air heater unit’s total weight (net weight of air
heater unit and  uid in air heater unit). The air heater
unit’s pipe connections must not be subjected to the
weight of the connecting pipe system nor to expansion
forces.

NOTE: Loads and impacts on the pipe system can cause

damage to the air heater unit.

Use a counterhold when tightening the connecting
coupling to prevent the connecting pipes from rotating,
see Figure 1.

Figure 1. Tightening the connecting coupling

Cleaning

Always use environmentally friendly cleaning agents that
will not damage the air heater unit.

Certi cation

Luvata is accredited in accordance with the ISO 9001
quality management system and ISO 14001 environ­mental management system.

Product description and safety instructions

1034564 We reserve the right to alter speci cations

Air heater unit LVD

GB

3

On delivery

The air heater unit is designed to withstand normal loads
during transport. After transport and unloading it is
important to check that no damage has occurred. Check
in particular the  ns of the heat exchanger and the outer
casing and connecting pipes of the air heater unit. Any
transport damage should be reported immediately to the
carrier and to Luvata. Also make notes on the consign­ment note.

Installation and pipe connections

The air heater unit must be permanently installed and
positioned so that the required air supply is obtained.
The air heater unit is intended to be installed directly on
the ceiling or by using drop rods (accessory LVDZ-03),
see Figure 2 and Figure 3. Both the air heater unit and
accessories are provided with holes which are designed for
installation.
If air discharge sleeve LVDZ-04 is used, the contact guard
should be  tted to it. The air discharge sleeve is  tted to
the air heater unit’s fan outlet.
Any pipe connections can be used for the  uid connec­tions.

Figure 2. Installation on the ceiling

350 mm

Figure 3. Installation using drop rods

Electrical connection

The fan motor must be connected to a lockable safety
switch. The safety switch must not be used to start and
stop the unit, but it must be started/stopped using other
external equipment.
Ahead of the motor a motor cut-out should be  tted which
must not be set higher than the motor’s maximum permit­ted current. A motor cut-out is not necessary on motors
with an integrated temperature monitor when the tempe­rature monitor is connected.
On delivery the fan motor is connected to a junction box
located on one of the sides of the air heater unit.
The connecting electrical cable is connected as illustrated
in the wiring diagram in the section headed Connection
diagram. Then check that the fan rotates in the direction
of the rotation arrow. The arrow is located on the outside
of the fan ring.

Dismantling

When dismantling the air heater unit from a system, it
must  rst be drained of all liquid.

NOTE: Environmentally hazardous liquids must be

collected in a container and left for disposal/recycling.

Installation

1034564 We reserve the right to alter speci cations

Air heater unit LVD

GB

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Preventive maintenance

The following should be checked regularly to prevent
operational failures:

• Abnormal sounds or vibrations – check motor bearing
and fan impeller.

• Fastening devices – check that all bolted joints are
undamaged.

• Electrical installation – check for any damage and that
the safety switch functions correctly.

• Fin structure – check that it is clean and undamaged.

• Fan impeller – check that it is clean and undamaged.

Fan unit

The fan motors do not require regular maintenance
because they have permanently lubricated bearings.

Cleaning

The best method of cleaning the air heater unit’s  n heat
exchanger is to use compressed air or a high pressure
washer. The nozzle should always be held at right angles
to the surface of the  ns and not closer than 150 mm so
as not to damage the  ns, see Figure 4. Fins damaged
during cleaning can be straightened using a  n comb
(accessory QLAZ-20).

Min 150 mm

Figure 4. Cleaning the  n heat exchanger

When cleaning with compressed air:

1. Switch off the mains supply to the air heater unit.

2. Loosen the four screws (A) and remove the front, see
Figure 5.

3. Set the nozzle at right angles to the surface of the  ns
so as not to damage the  ns.

When cleaning with a high pressure washer:

1. Switch off the mains supply to the air heater unit.

2. Loosen the four screws (A) and remove the front, see
Figure 5.

3. Cover the motor with plastic to protect the motor from
moisture.

4. Spray environmentally friendly cleaning agent at low
pressure onto the  n heat exchanger.

5. High pressure wash with water after 10-12 minutes.

Remember to hold the nozzle at right angles to the

surface of the  ns.

6. Check that no remnants of the cleaning agent are left
after cleaning, since they can bind fresh dust.

Spare parts

In installations with very high demands on availability, we
recommend that one motor is kept as a spare part.

NOTE: Motors kept as spare parts should be stored

indoors in dry and dust-free conditions.

NOTE: Only parts and materials recommended by Luvata

are to be used in order for the warranty speci ed in the
order con rmation to be valid.

Maintenance and service

1034564 We reserve the right to alter speci cations

Air heater unit LVD

GB

5

Replacing the motor and fan impeller

1. Switch off the mains supply to the air heater unit and
lock the safety switch in the OFF position.

2. Loosen the four screws (A) and remove the front,
see Figure 5.

3. Loosen the locking screw on the fan and dismantle the
fan from the motor.

4. Disconnect the electrical cable from the junction box.

5. Loosen the four screws holding the motor on the motor
mounting and lift off the motor.

6. Install the new fan unit by following the above
instructions in reverse order.

7. Check that the fan impeller is centred in the fan ring
and that the fan rotates in the direction indicated by
the arrow.

8. Start the air heater unit.

A

Figure 5. Removing the front

Risk of freezing

In installations with an ambient temperature of less than
0°C, there is a risk of damage due to freezing if the heat
exchanger becomes too cold. The air heater unit should
be drained of water if the system is not used during the
winter. Use compressed air to blow out any remaining
water when the heat exchanger cannot be fully drained.
The air heater unit does not need to be drained if it is
 lled with water containing anti-freeze.

Long-term storage

When the unit is stored for longer than one month, the
following applies:

• Store the air heater unit indoors in the position in
which it is to be installed.

• Cover the air heater unit with reinforced plastic or
some other mechanical protection to prevent conta­mination and water from penetrating and soiling or
damaging the  n structure and fan unit.

• The air heater unit’s pipe connections should be
sealed.

• If the air heater unit is stored in a damp environment,
the surface  nish must be checked regularly to ensure
that damage does not occur. Touch up any damage to
paintwork.

Maintenance and service

1034564 We reserve the right to alter speci cations

Air heater unit LVD

GB

6

Operating data

Max air temperature around the motor: +70°C
Min air temperature around the motor: -15°C.
Max permitted operating pressure: 1.6 MPa at 100˚C

All heat exchangers are leak-tested under water using dry air.

Motor data

For information, refer to the air heater unit’s data plate.

Dimensions, weight and volume

30

Ø 15

CB

A
D

K

K

20

E

F

H

Ø G

Figure 6. Dimensions

Table 1. Dimensions (mm)

LVDV ABCDEFGH

40 930 600 635 760 155 345 406 190

50 1130 700 735 960 220 380 514 160

Table 2. Weight, volume and pipe connections

LVDV Weight (kg) Volume (litres) K (pipe connection)

40 31 1.6 DN 20

50 45 3.8 DN 25

Heat exchanger

The heat exchanger consists of tubes that are mechanic­ally expanded onto the  ns. The  ns are manufactured
as whole plates without slots to avoid dust and  bres
collecting on the  n structure.

Fan unit

The fan unit’s motor is a  ange motor, journalled on ball
bearings, with a self-resetting thermal cut-out (not on
three phase). The fan impeller has a painted steel hub
and aluminium blades.

Table 3. Technical data, fan unit

LVDV

Rotational

speed (rpm)

Rated output

(kW)

Rated current (A), 50 Hz

Single phase

230 V

Three phase

400 V Y

40-1

1300

1)

900
670

0.15

1.50

1.0

0.7

–
–
–

40-6 920

1)

0.18 – 0.7

40-4 1380

1)

0.18 – 0.7

50-1

900

1)

670
570

0.17

1.7

1.2

0.7

–
–
–

50-6 920

1)

0.18 – 0.7

50-4 1410

1)

0.55 – 1.5

1)

Speed as delivered. Other speeds can be obtained by altering the motor

connections as indicated in the connection diagram, see Figures 8–10.

Table 4. Speed with accessories for voltage control

LVDV 230 V 150 V 130 V 115 V 100 V 80 V

40-1 1300

1)

980

1)

820 690

1)

560 380

50-1 900

1)

770 690

1)

610

1)

510 370

1)

Speed as delivered

Protection classes

Motor: IP55
Junction box: IP44

Technical data

1034564 We reserve the right to alter speci cations

Air heater unit LVD

GB

7

Three phase

R S T PE

12

3

Yellow/

Green

Fan motor

Figure 7. Y-coupling, design as supplied

Single phase with thermal cut-out

PE L N

12345 6

Yellow/

Green

Motor

Figure 8. High speed, design as supplied

12

3456

PE L N

Yellow/

Green

Motor

Figure 9. Intermediate speed

12 34 56

PE L N

Yellow/

Green

Motor

Figure 10. Low speed

Connection diagram

Luvata Söderköping AB
SE-614 81 Söderköping, Sweden
Phone [phone]
Fax [phone]

www.luvata.com/coiltech

5000-0096 • September 2009

Air heater unit LVD

GB

A COILTECH PRODUCT MANUFACTURED BY LUVATA SÖDERKÖPING AB

Standard design

Air heater unit LVDV-aa-b-c-d

Size (aa)
40, 50

Motor (b)
1 = 1x230 V
4 = 3x400 V, 4-pin (without controls, c = 0)
6 = 3x400 V, 6-pin (without controls, c = 0)

Control equipment (c)
0 = without controls
A = A box
B = B box
C = C box

Design digit (d)
1 = 2004 –

Control equipment

Air heater unit installation pack LVDZ-a-1

Type (a)
A = A box
B = B box
C = C box

Accessories

Drop rods, set LVDZ-03-1

Air discharge sleeve LVDZ-04-bb

Size (bb)
40, 50

Spare parts for LVDV 40

Fan impeller LVDV-99-01-5

Motor (1x230 V, 3 speeds) LVDV-99-02-12

Motor (3x400 V, 4-pin) LVDV-99-02-14

Motor (3x400 V, 6-pin) LVDV-99-02-16

Contact guard LVDV-99-03-3

Heat exchanger LVDV-99-04-1

Spare parts for LVDV 50

Fan impeller LVDV-99-01-6

Motor (1x230 V, 3 speeds) LVDV-99-02-13

Motor (3x400 V, 4-pin) LVDV-99-02-17

Motor (3x400 V, 6-pin) LVDV-99-02-15

Contact guard LVDV-99-03-4

Heat exchanger LVDV-99-04-2

Product code