FläktGroup LQRA Rotary heat exchanger Installation guide

Brand: FläktGroup

Model: LQRA Rotary heat exchanger

Type: Installation guide

FläktGroup DC_9207GB 20180412_R0 Speciﬁcations are subject to alteration without notice

LQRA ROTARY HEAT EXCHANGER,

CONSTANT SPEED

MAINTENANCE

ELECTRICAL INSTALLATION – CONSTANT SPEED

MOTOR SPECIFICATION

Size Rating

Voltage 1)

Rated current

60–84 750 230 VD

400 VY

3,3

1,9

The motor is always wired at the factory for a 380 V star power supply

N.B.

To test the motor alone, lift the belt off the pulley. Always check the

direction of rotation, which is shown on the casing.

DELIVERY

The delivery includes a heat exchanger with a drive motor.

IMPORTANT!

Regarding the control logic and operation: During start

up and after each time the AHU has been stopped, it is

recommended that the exhaust fan operates during

1 minute before the supply fan is started.

CIRCUIT DIAGRAM (GENERALIZED)

-Q1

L2 1

-F1

-K1

135

246

-K1:1

UVW

-SB

135

UVW PE

24614

95 97

96 98

400/230 V

50 Hz

13 14

-K1

A1 A2

135

246

-F2

-GX1

-GTD

-GT1

-GX1

-K:FF-SB

13 14 13 14

Aut

Man

-S1

-K1:1

95 96

21 22

31 32

43 44

230 V

K1:k

-H1

-K1

43 44

SYMBOLS USED

F1 Fuses

F2 Control circuit fuse

GT1 Thermostat

GTΔ Differential thermostat

GX1 Timeswitch, a = 7-day dial with contacts

(intermittent operation), b = 24-hour dial

with contacts (purging)

H1 Indicating lamp

K:FF Interlocks, e.g. exhaust air fan

K1 Heat exchanger contactor

K1:1 Overcurrent protection

K1:K Interlock contacts in K1. Used in systems with speed detector

M Drive motor

Q1 Main switch in equipment cubicle

S1 Selector switch

SB Safety isolating switch

FläktGroup LQRA Rotary heat exchanger Installation guide

FläktGroup LQRA Rotary heat exchanger Installation guide

FläktGroup LQRA Rotary heat exchanger Installation guide

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