Danfoss LD, LDS Data sheet

Data sheet

Flame sensors LD/LDS

Description Danfoss LD/LDS sensors are used to detect

the flame in yellow flame oil burners. They are designed for use with Danfoss units of the OBC 80 and BHO 70 series. LD/LDS sensors meet the requirements of the EN298:2012 standard, as well as those of the RoHS and WEEE Directives.

Function The LD/LDS sensors are based on the photo

transistor principle in connection with an amplifier and convert light from the flame into a current. The flame’s characteristics and the location of the sensor influence the size of the photo current created in LD/LDS. For this reason, LD/LDS is available in two sensitivity levels. If a strong enough signal is not produced with

Electrical connection The LD/LDS sensors connect to Danfoss units of

the OBC 80 and BHO 70 series as shown in the diagram.

the selected sensor, select a sensor with a higher sensitivity level. If the flame cannot be detected at the highest level of sensitivity, use the Danfoss UV sensor. To determine the signal’s quality, use the gauge set-up below. For no flame/darkness, the value must be ≤ 5 μA; for flame/light the value must be ≥65 μA.

Please note that the blue wire must be connected to terminal 11, and may not be connected to the common 0 terminal (2) or the appertaining auxiliary terminal in the base section.

Blue Blac

Installation The LD/LDS sensors can be installed using a

flange and clamping ring; alternatively, use a rubber sleeve (delivered mounted on LD/LDS).

The sensors are available in two standard lengths, with a longer piece featuring built-in extension tubes.

Danfos produc Al

Danfoss A/S

Heating Segment

Data sheet Flame sensors LD/LDS

057H7071

057H7072

Technical Data

Ordering

Standard program

Characteristics Data

Rated voltage 230V ac

Operating range 195-253 V ac

Frequency 50-60 Hz

Enclosure IP 40

Installation Any position

Flame sensor measuring condition 12V dc +/- 2% with Ri=100 Kohm +/- 2%

Signal output Max. 85 µA

Recomended signal output (light) ≥ 65 µA

Flame signal for no light (dark) ≤ 5 µA

Ambient temperature operation -20 to + 70°C

Ambient temperature transport -30 to + 70°C

Weight See table

Wiring OBC 80/ BHO 70

Typ e

LD 2000 65.5 Normal Black 94 057H7105

LD 800 65.5 Normal Black 41 0 57H7106

LD 500 50.0 Normal Black 26 057H 7107

LDS 500 50.0 High Blue 26 057H710 8

LDS 600 65.5 High Blue 32 057H710 9

LDS 350 105.0 High Blue 22 0 57H 7110

LDS 800 65.5 High Blue 41 05 7H7 111

Flange - - - - 3 057H7071

Clamping ring - - - - 1 057H7072

Cable length

(mm)

Blue wire, neutral Terminal 11

Black wire, signal Terminal 12

House length

(mm)

Sensitivity

Colour of

house

Weight

(g)

Code no.

Dimensions

s can accept no responsibility for possible errors in catalogues, brochures and o ther printed material. Danfoss reserves the right to alter its pro ducts without notice. This also applies to ts already on order provided that such alterations can be m ade without subsequential changes being necessary in specications already agreed.

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