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

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.

Electrical connection	The LD/LDS sensors connect to Danfoss units of
	the OBC 80 and BHO 70 series as shown in the
	diagram.

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 Black

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.

© Danfoss | 2018.07

VD.AU.B2.02 | 1