FläktGroup EQEK Eletric air heater Installation and Maintenance Manual

Brand: FläktGroup

Model: EQEK Eletric air heater

Type: Installation and Maintenance Manual

FläktGroup DC_8637GB 20180306_R0 Speciﬁcations are subject to alteration without notice

ELECTRIC AIR HEATER

FOR 3X400 V AND 3X440 V

INSTALLATION AND MAINTENANCE INSTRUCTIONS

GENERAL

The electric air heater is equipped with tubular heating elements. The

air heater is available in variants without or with built-in thyristor and

stepping switch as well as with the output divided into equal steps or

binary steps.

It is permissible to install air handling units with electric air heater

in dry rooms where there is no risk of ﬁre or explosion and in such

garages where the pouring of petrol does not normally occur. Besides

the variant for installation in dwellings, a variant conforming to degree

of protection IP55 is available.

DESIGN DATA

Max. permissible air temperature downstream of the heater: 40 °C.

The air heater is equipped with two mutually independent overheat

protections: one that automatically resets and another with manual

reset that open the operating circuit of the electric air heater if the

overheat temperature is exceeded.

The air heater conforms to the provisions of EN61000-6-2,

EN61000-6-3 and EN61000-3-11. It must not be installed as an in-duct

air heater.

INSTALLATION

Make sure that the direction of airﬂow through the heater agrees

with the arrow ﬁxed to the casing. The air ﬂow must be horizontal or

vertical upwards.

ELECTRICAL WIRING

1. The electrical installation work shall be carried out by a qualiﬁed

electrician only.

Min.ﬂow, m3/s

005 0.28

008 0.55

009 0.55

011 0.75

014 0.80

018 1.10

020 1.20

023 1.65

027 1.60

032 2.00

036 2.10

041 2.40

045 2.65

047 2.80

050 3.25

054 3.20

056 3.30

063 3.75

068 4.00

072 4.30

079 4.70

090 5.35

2. The partic ulars of the operating voltage, output and overheat

protection etc. of the electric air heater are speciﬁed in the wiring

diagram supplied with the air heater and on the identiﬁcation plate

on the cover of the heater.

3. The air heater must be connected to the mains supply by means of

a ﬁxed cable. The length of the cable shall be adjusted to the

relevant location and be rated for the ambient temperature.

4. The system must not permit switching on the power supply to the

air heater without ﬁrst or simultaneously starting the fan that

conveys air to it.

5. The system must not permit switching off the power supply to the

relevant fan without ﬁrst switching off the power supplied to the air

heater. For outputs in excess of 30 kW, a post-air discharge period

3 minutes is recommended before the fan stops. This ensures that

the overheat protections will not trip due to subsequent heat build-up.

6. All-pole switching with a minimum distance of 3 mm between open

contacts must be provided in the ﬁxed installation.

MIN.FLOW

EQEK ELECTRIC AIR HEATER

Datasheet

FläktGroup DC_8637GB 20180306_R0 Specifications are subject to alteration without notice

ELECTRICAL CONNECTIONS (PRINCIPLE)

Knock-out” for cable entry,

power supply, h=1

Can be located on underside to

special order, h=2

Fasteners for cover panel (Philips screw)

Reset button

Cable lead-through for quick-ﬁt cable

Heating elements

MAINTENANCE AND OPERATION

Under normal conditions the EQEK air heater does not require any

maintenance.

Possible loss of heat may be due to an interruption in the operating

circuit.

The supply air fan will interlock the air heater’s operation circuit.

The supply air fan continues to operate after the ventilation system

has been switched off in order to cool the heating elements in the air

heater. This post-cooling period can be set on the time relay. The air

heater with built-in control and stepping switch is equipped with two or

several mutually independent overheat protections, B and C.

C opens the operating circuit of the air heater if the temperature

exceeds 120 °C. The supply air fan continues to operate to cool the

heating elements after which it stops. C must be manually reset.

Overheat protection B opens the operating circuit of the air heater if

the control temperature exceeds 70 °C and resets itself automatically

when the temperature drops again.

The installation is wired so that overheat protection C opens the

operating circuit to the contactors for the air heater and to the

contactor for the supply air fan.

Caution!

The heating elements are still hot after you have

switched off the unit. You risk getting burned

if you touch them. Switch off the unit well in

advance before cleaning.

REMOTE INDICATION OF ALARMS

Alarm functions with remote indication from the manually resettable

overheat protection C can be entered in the automatic equipment of

the air heater.

OPERATION

1. The ventilation system is started either manually by means of a

switch or automatically with a timer. The fan starts and the air

heater is gradually switched in by means of the stepping switch.

2. If the temperature in the elements reaches the limit temperature

preset in overheat protection B (70 °C), the heat heater is switched

off. The heater is automatically switched in again when the temper-

ature has dropped. If due to a malfunction in the ventilation system,

the temperature rises so high that overheat protection C trips, the

fan stops and the air heater is switched off. C must be reset manu-

ally after the malfunction has been remedied.

3. In order to prevent cold air from being discharged into the ven-

tilation system in the event of a malfunction in the air heater or its

control equipment, a thermostat should be installed in the supply

air path to stop the air handling unit if the temperature (approx.

+10 °C) drops below the preset limit, after atime delay of approx. 10

minutes from the time when the ventilation system started up.

Datasheet

FläktGroup DC_8637GB 20180306_R0 Specifications are subject to alteration without notice

PRODUCT CODE

Electric air heater EQEK-aaa-bbb-c-d

Unit size (aaa)

005-090

Output, kW (bbb)

See table

Voltage (c)

2 = 3 x 230 V

4 = 3 x 400 V

6 = 3 x 440 V 60 Hz

Output steps (d)

1 = 1 step, without control c = 2 bbb = 003-024

c = 4.6 bbb = 003-043

2 = 2 equal steps, without control c = 2 bbb = 005-048

c = 4.6 bbb = 009-081

3 = 3 equal steps, without control c = 2 bbb = 009-075

c = 4.6 bbb = 015-120

4 = 4 equal steps, without control c = 2 bbb = 013-090

c = 4.6 bbb = 020-150

5 = binary steps, without control c = 2-6 bbb = 003-280

6 = with thyristor and possible

stepping switch c = 2 bbb = 003-230

c = 4 bbb = 003-280

not applicable to c =6

Datasheet

FläktGroup DC_8637GB 20180306_R0 Specifications are subject to alteration without notice

Total

output, kW

Amperes Output steps for mains voltage

For uniform

400 V

For uniform

3-phase

load 440 V

step

equal

steps

equal steps

Binary steps

34.3 3.9 0.2 0.4 0.8 1.6

57.2 6.6 30.3 0.7 1.3 2.7

710.1 9.2 50.5 0.9 1.9 3.7

913.0 11.8 74.5 4.5 0.6 1.2 2.4 4.8

13 18.8 17.1 96.5 6.5 0.9 1.7 3.5 6.9

15 21.7 19.7 13 7.5 7.5 5.0 5.0 5.0 1.0 2.0 4.0 8.0

17 24.5 22.3 15 8.5 8.5 5.7 5.7 5.7 1.1 2.3 4.5 9.1

20 28.9 26.2 17 10.0 10.0 6.7 6.7 6.7 5.0 5.0 5.0 5.0 1.3 2.7 5.3 10.7

24 34.6 31.5 20 12.0 12.0 8.0 8.0 8.0 6.0 6.0 6.0 6.0 1.6 3.2 6.4 12.8

27 39.0 35.4 24 13.5 13.5 9.0 9.0 9.0 6.8 6.8 6.8 6.8 1.8 3.6 7.2 14.4

30 43.3 39.4 27 15.0 15.0 10.0 10.0 10.0 7.5 7.5 7.5 7.5 2.0 4.0 8.0 16.0

34 49.1 44.6 30 17.0 17.0 11.3 11.3 11.3 8.5 8.5 8.5 8.5 2.3 4.5 9.1 18.1

37 53.4 48.6 34 18.5 18.5 12.3 12.3 12.3 9.3 9.3 9.3 9.3 2.5 4.9 9.9 19.7

43 62.1 56.4 37 21.5 21.5 14.3 14.3 14.3 10.8 10.8 10.8 10.8 2.9 5.7 11.5 22.9

47.5 68.6 62.3 43 23.8 23.8 15.8 15.8 15.8 11.9 11.9 11.9 11.9 3.2 6.3 12.7 25.3

54 77.9 70.9 27.0 27.0 18.0 18.0 18.0 13.5 13.5 13.5 13.5 3.6 7.2 14.4 28.8

59 85.2 77.4 29.5 29.5 19.7 19.7 19.7 14.8 14.8 14.8 14.8 3.9 7.9 15.7 31.5

65 93.8 85.3 32.5 32.5 21.7 21.7 21.7 16.3 16.3 16.3 16.3 4.3 8.7 17.3 34.7

69 99.6 90.5 34.5 34.5 23.0 23.0 23.0 17.3 17.3 17.3 17.3 4.6 9.2 18.4 36.8

75 108.3 98.4 37.5 37.5 25.0 25.0 25.0 18.8 18.8 18.8 18.8 5.0 10.0 20.0 40.0

81 116.9 106.3 40.5 40.5 27.0 27.0 27.0 20.3 20.3 20.3 20.3 5.4 10.8 21.6 43.2

90 129.9 118.1 30.0 30.0 30.0 22.5 22.5 22.5 22.5 6.0 12.0 24.0 24.0 24.0

108 155.9 141.7 36.0 36.0 36.0 27.0 27.0 27.0 27.0 7.2 14.4 28.8 28.8 28.8

120 173.2 157.5 40.0 40.0 40.0 30.0 30.0 30.0 30.0 8.0 16.0 32.0 32.0 32.0

150 216.5 196.8 37.5 37.5 37.5 37.5 10.0 20.0 40.0 40.0 40.0

180 259.8 236.2 12.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0

230 332.0 301.8 15.3 30.7 30.7 30.7 30.7 30.7 30.7 30.7

280 404.2 367.4 18.7 37.3 37.3 37.3 37.3 37.3 37.3 37.3

335 483.5 439.9 22.3 x 15

375 548.5 499.1 25 x 15

ELECTRIC AIR HEATER FOR 3X400 V AND 3X440 V

* = The output groups up to and including 3.5 kW should be connected for 2-phase, 400 V/440 V

OUTPUT STEPS WITHOUT BUILT-IN THYRISTOR AND STEPPING SWITCH FOR 3 × 400V AND 3 × 440V

Datasheet

FläktGroup DC_8637GB 20180306_R0 Specifications are subject to alteration without notice

Overheat protection

Resets automatically

The output groups should be connected from terminal conn. number 7 and upward.

A detailed wiring diagram is supplied together with each air heater.

WIRING DIAGRAM (BASIC CIRCUIT DIAGRAM) WITHOUT BUILT-IN THYRISTOR AND STEPPING SWITCH

TERMINAL DIAGRAM WITH QUICK-FIT CONNECTION

One power feed for 0 – 200 A

Two power feeds for 200 – 320 A

Four power feeds for 320 – 640 A

Overheat protection

Must be reset manually

Datasheet

FläktGroup DC_8637GB 20180306_R0 Specifications are subject to alteration without notice

Number of over heat protection may vary.

Power supply

Control voltage 230V –

SC-PP-OEM/D TTC-OEMV/PP

One power feed for 0 – 200 A

Two power feeds for 200 – 320 A

Four power feeds for 320 – 640 A

EXPLANATION:

A Load

B Over heat protection with automatic reset

C Over heat protection with manual reset

D Thyristor regulator

E Interlocking

F Control switch

G Potential free contacts for over heat indication

Max 240 V – 1 A

Zero numbers used:

001...028

TERMINAL DIAGRAM (WITHOUT QUICK-FIT CONNECTOR) FOR AIR HEATER WITH BUILT-IN THYRISTOR AND

STEPPING SWITCH

Input voltage 0...10V

FläktGroup EQEK Eletric air heater Installation and Maintenance Manual

FläktGroup EQEK Eletric air heater Installation and Maintenance Manual

FläktGroup EQEK Eletric air heater Installation and Maintenance Manual

Related papers

Other documents