Swegon SILVER C Manuel utilisateur

GB.EXCHSILV2.141119

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Instructions for the heat exchanger control system SILVER C

RX, RECOnomic, sizes 100/120, RECOsorptic, sizes 50-120

1. General

The heat exchanger control system is a control system for

380 W step motors. It is designed for precise and quiet

control of rotary heat exchangers in the SILVER C RX

ventilation units with standard rotor (RECOnomic) in size

100/120, and with sorption rotor (RECOsorptic) in sizes

05-120.

Integrated functions:

• 0 - 10 V DC analogue input for controlling the speed.

• Alarm for overloading, over-voltage and under-voltage.

• Protective motor switch with integrated current limit-

ing function.

• Short-circuit protected inputs and outputs.

• Digital input for start/stop.

• Digital input for alarm resetting.

• Integrated EMC ﬁlter.

In the size 50-80 SILVER C units the heat exchanger

control system is located inside the ﬁlter section in the

lower level. In the size 100/120 SILVER C units the heat

exchanger control system is located inside the fan or ﬁlter

section to the left of the centre section in the lower level

(viewed from the inspection side). For access, open the

inspection door.

Forbidden to start operation

It is absolutely forbidden to start operation until the

entire air handling unit, where the above-mentioned heat

exchanger control system is integrated, has been declared

to conform to relevant regulations in Machinery Directive

98/37/EEC and to existing national legislation, if applica-

ble.

The heat exchanger control system must not be energized

until the entire installation conforms to the provisions in

ALL relevant EU Directives. If the heat exchanger control

system has been damaged, for instance during transport,

it must be inspected and repaired by qualiﬁed personnel

before the voltage is connected.

Safety functions

The heat exchanger control system is protected against

phase-to-phase short.circuiting, and has integrated cur-

rent limiting function for protection of the motor.

The electrician is accountable for ensuring correct earth-

ing as well as protection according to local standards

and regulations. An earth fault circuit breaker, multiple

protective earthing or ordinary earthing can be used as

extra protection, provided that the local regulations are

complied with. The earth leakage currents exceed 3.5 mA.

Therefore a ﬁxed, permanent installation and heavy-duty

protective earthing are required.

NOTE! If an earth fault occurs, there can be a direct cur-

rent component in the leakage current. Earth fault circuit

breakers should therefore be designed to be able to detect

this and be installed according to applicable national and

international regulations, where they are used.

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2. Technical data

Power supply 50-60 Hz,

1x230 V AC

-10%/+15 %

Rated motor shaft power: 0.38 kW

Motor current cons. (max. load) 4.5 A

Maximum fuse protection 10 A

Ambient air temp., operation -40/+40 °C

Ambient air temperature, storage -40/+70 °C

Enclosure class IP54

Control voltage 0-10 V DC

Weight 4.9 kg

3. Function

General

The motor control system advantageously replaces the

traditional solution with gear motor. The step motor has

uniform torque across the entire rpm range, in contrast

to gear motors that lose torque at low and high speeds

of rotation respectively. The step motor's constant torque

curve provides an essentially greater operating range

where the speed of rotation can be controlled with preci-

sion. It is therefore possible to control the heat recovery in

an energy-optimum manner and achieve a more accurate

temperature.

The heat exchanger control system is controlled with 0 –

10 V signals.

The step motor is controlled in micro steps with sinusoidal

constant current for ensuring motor shaft rotation with

uniform torque throughout the revolution. This prevents

torque pulses and at the same time provides quieter

operation.

Rotation monitor

The rotation monitor consists of an inductive sensor.

When the rotation monitor is mounted correctly, the sen-

sor's LED ﬂashes yellow each time the detection surface

passes the rotation monitor.

Operation

LED indications

The junction box has 2 integrated LEDs located under the

cover. They are therefore not visible when the cover is

mounted.

The green LED is constantly lit when voltage is supplied..

The red LED is lit if at least one active alarm has been initi-

ated.

Warning The chassis on the heat exchanger control

system can become very warm!

Warning! Do not repair the heat exchanger con-

trol system at the site. Never attempt to repair a

defective control system unit.

Contact the supplier to obtain a replacement unit.

Fig. 1. Dimensions

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Control with 0 – 10 V DC

The heat exchanger control system can be controlled via

external input signals. The heat exchanger control system

needs a start/stop signal in order to start. The start/stop

signal is transmitted by short-circuiting Terminals 7 (Start/

stop) and 8. ( ) (See Fig. 2).

The heat exchanger control system regulates the speed

linearly between 0 % and 100 %, however it is limited to

the regulation range between the preset lowest and high-

est speeds (See Fig. 3) 100 % speed is deﬁned as an input

voltage of "0-10 V in" (Terminal 13) at 9.5 V (100 % at

9.5 V, +/-2 %).

Compensation for non-linear heat transfer

The 0 – 10 V signal is compensated internally in the heat

exchanger control system with a contrary rotor character-

istic to provide far more linear heat transfer than compara-

ble systems and better regulation (See Fig. 4).

The function selector switch positions (Factory

preset):

4 = Sizes 100/120, standard rotor

5 = Sizes 50/60, sorption rotor

6 = Sizes 70/80, sorption rotor

7 = Sizes 100/120, sorption rotor

To reverse the direction of rotation

The direction of motor rotation is reversible so that the

rotor always has the correct direction of rotation in rela-

tion to the purging sector.

To reverse the motor's direction of rotation, transpose two

optional conductors to Motor Terminal V - U - W (See Fig.

6).

Automatic restart after alarm

The heat exchanger control system automatically attempts

to start again following an alarm, such as over or under-

voltage alarm. This automatic restart is carried out maxi-

mally 3 times (rotation monitor alarm: 1 restart) After that,

the heat exchanger control system will remain in the error

mode, and must be restarted by resetting the alarm.

Alarm resetting: See Section on "Alarm resetting".

Alarm relay/output

The heat exchanger control system is equipped with an

alarm output in the form of an alarm relay. The alarm relay

is activated if an alarm arises in the heat exchanger control

system or if alarms are discovered in motors or fans. Con-

nect the alarm signal cable leads to Terminals 16 (C) and

17 (normally closed). The relay contact is closed in deener-

gized condition and if there are active alarms.

Alarm reset

The heat exchanger control system is equipped with a

digital input for resetting alarms. The alarm input is reset

by short-circuiting Terminals 11 (Alarm reset) and 12 ( )

(See Fig. 2). The alarm output can also be reset by switch-

ing off the supply voltage to the heat exchanger control

system for more than 60 seconds.

Fig. 2. Junction box, overview of the wiring terminals

Fig. 3. The ratio between the speed and the min./max. speed setting

Fig. 4. Compensation for non-linear heat transfer.

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4. Electrical connections

The heat exchanger control system has a junction box installed in the

lower part of the heat exchanger section. For access, open the inspec-

tion cover in front of the heat exchanger.

To connect control signal wiring

• Insert the control cables into the junction box through the cable

grommets ﬁtted with rubber gaskets. Clip an appropriately large

hole in the gaskets to enable the gasket to seal tightly around the

cable. Only by doing so can the stated Enclosure class IP54 be com-

plied with.

• Connect the 0 – 10 V DC control signal from an external regula-

tor in the junction box to Terminals 13 (0 - 10 V in) and 14 (See

Fig. 5). The heat exchanger control system regulates the speed in

a capacity linear manner between 0 % and 100 % (100 % at 9.5

V +/- 2 %), however according to the preset times for up ramp

and down ramp, and limited to the regulation range between the

preset lowest and highest speeds (See Fig. 3 and 4). The ”Control

with 0-10 V DC” function is described in Section 3. Function.

• Connect the start/stop signal cable leads in the junction box to Ter-

minals 7 (Start/stop) and 8 ( ) (See Fig. 5). This should be a poten-

tial-free digital contact. The ”Start-/stop” function is described in

Section 3. Function.

• Connect the Alarm Reset signal cable leads to the heat exchanger

control system's junction box to Terminals 11 (Alarm reset) and 12 (

) (See Fig. 5). This should be a potential-free digital contact. The

"Alarm Reset" function is described in Section 3. Function.

• The heat exchanger control system is equipped with an alarm

relay output with normally-open contact function in the event of

a malfunction or alarm. The alarm signal cable is marked "Alarm

relay", and should be connected in the junction box to Terminals

16 (C) and 17 ( ) (See Fig. 5). This should be a potential-free digi-

tal contact. The "Alarm Relay" function is described in Section 3.

Function.

• Connect the sensor cable of the rotation monitor to Terminals 9

(digital in), 10 ( ) and 15 (+10 V out, power supply to sensor).

Fig. 5. Junction box, overview of the wiring terminals

Blue

Black

Brown

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Electric Power Connections

In the size 50-80 SILVER C units the heat exchanger

control system is located inside the ﬁlter section in the

lower level. In the size 100/120 SILVER C units the heat

exchanger control system is located inside the fan or ﬁlter

section to the left of the centre section in the lower level

(viewed from the inspection side). For access, open the

inspection door.

For appropriate connection, see Fig. 6.

For electrical data, see Section 2.

Fig. 6. To connect power supply wiring to the heat exchanger control system.

To change the rotor's direction of rotation, transpose

two optional conductors to Motor Terminal V - U - W.

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5. Trouble shooting

To open the heat exchanger control system

Before you open the heat exchanger control system, isolate the line voltage and wait at least 2 minutes. Failure to do so

will expose you to the risk of coming into contact with harmful residual voltage inside the unit.

Troubleshooting when the heat exchanger control system is controlled with external (A/D) signals:

Symptoms Cause Action

The motor is not rotating

There is no power supply

Check whether there is voltage on the heat exchanger control system's ”L” and ”N” terminals on

the models for 230 V.

(Operating voltage is speciﬁed on the rating plate, afﬁxed to the side of the heat exchanger control

system.)

Poor electrical connections Check the connectors and other electrical connections

There is no in-operation signal Short-circuit Terminals 7 and 8 in the heat exchanger control system junction box marked (GND)

and ”Start/Stop” (Fig. 5).

There is no 0 – 10 V DC control

signal

Check that the 0 - 10 V DC control signal is correctly connected to Terminals 13 and 14 in the heat

exchanger control system junction box marked (GND) and ”0-10 V in” (Fig. 5).

The motor has been stopped by the

internal protective motor switch 3

times due to overloading or some

other alarm.

Reset the alarm by short-circuiting Terminals 11 and 12 in the heat exchanger control system

junction box marked (GND) and ”Alarm reset” (Fig. 5).

You can also reset the alarm by switching off the supply voltage to the heat exchanger control

system and switching it back on after 60 seconds.

Defective heat exchanger control

system Replace the heat exchanger control system

Defective motor Replace the motor

The heat exchanger control

system switches off.

¤) Remember to reset the

alarm by short-circuiting

Terminals (GND) and

"Alarm Reset".

At least two phases are short-circuit-

ed on the motor wiring terminals. Eliminate the short-circuit on the motor wiring terminals ¤)

Defective motor Replace the motor ¤)

Overloaded motor Remedy the overload condition of the motor ¤)

Defective motor Replace the motor ¤)

Overloaded motor Remedy the overload condition of the motor ¤)

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6. Service and maintenance

No particular maintenance is required. Contact Swegon if

any problem arises.

To troubleshoot the unit: See Section 5. Troubleshooting.

7. Alarm

The integrated alarm relay in the junction box has nor-

mally-closed contacts and is marked "Alarm Relay". The

alarm relay contacts are closed in deenergized condition

and open in faultless condition. The alarm relay contacts

close in the event of an alarm. The heat exchanger control

system stops and an alarm indicating LED is lit. If the fault

ceases to exist, the alarm is reset automatically and the

heat exchanger control system starts up.

8. Environment and waste disposal

Help to protect the environment by ensuring correct

disposal of the packaging and use the products in accord-

ance with applicable environmental regulations.

Disposal of the product

Products with this mark must not be disposed as

ordinary household refuse. They must be collected

in separate containers according to applicable local

rules.

9. Applicable standards.

GB-61800-2 ”Electric motor operation with variable

speed, General Requirements”

EN-61800-3 ”General electromagnetic compatibility”

10. CE marking

Swegon AB certiﬁes under its own sole responsibility

that this product conforms to the Commission's Directive

92/31 with subsequent modiﬁcations concerning electric

compatibility as well as the Commission's Directive 73/23

dealing with electric material for use within certain voltage

limitations.

APPROVALS

EMC EN 61800-3

LVD EN 61800-2

PRODUCT STANDARD EN 61800 PART

2 & 3

THE ROHS DIRECTIVE YES

PRODUCT

APPROVALS CE

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