Belimo Aircontrols (USA), Inc. LF24-SR-E 35IN LB SPRING RETURN 24 VOLT at Controls Central

Belimo Aircontrols (USA), Inc. LF24-SR-E 35IN LB SPRING RETURN 24 VOLT

Brand: Belimo Aircontrols (USA), Inc.

SKU: LF24SRE

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Torque min. 35 in-lb, for control of air dampers, Built-in adjustable min-position for 3 position and proportional control.

Application	For fail-safe, modulating control with minimum position setpoint, or three position control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer?s specifications. The actuator is mounted directly to a damper shaft from 3/8? up to 1/2? in diameter by means of its universal clamp, 1/2? shaft centered at delivery. For shafts up to 3/4? use K6-1 accessory. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. The actuator operates in response to 24 VAC on wire 2 or 3, which allows the LF24- SR-E US to retrofit or replace Honeywell? M8405A actuators. A 2 to 10 VDC feedback signal is provided for position indication.

Application

For fail-safe, modulating control with minimum position setpoint, or three position control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer?s specifications. The actuator is mounted directly to a damper shaft from 3/8? up to 1/2? in diameter by means of its universal clamp, 1/2? shaft centered at delivery. For shafts up to 3/4? use K6-1 accessory. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. The actuator operates in response to 24 VAC on wire 2 or 3, which allows the LF24- SR-E US to retrofit or replace Honeywell? M8405A actuators. A 2 to 10 VDC feedback signal is provided for position indication.

Weight	3.3 lb [1.5 kg]

Servicing	maintenance free

Power Supply	24 VAC ï¿½ 20%, 50/60 Hz, 24 VDC ï¿½ 10%

Power Consumption Running	2.5 W

Power Consumption Holding	1 W

Transformer Sizing	5 VA (class 2 power source)

Electrical Connection	3 ft [1 m], 18 GA plenum cable with 1/2? conduit connector

Overload Protection	electronic throughout 0ï¿½ to 95ï¿½ rotation

Input Impedance	100 k ?

Angle of Rotation	max. 95ï¿½, adjustable with mechanical stop

Direction of Rotation (Motor)	reversible with built-in switch

Running Time (Motor)	150 sec constant, independent of load

Ambient Temperature Range	-22ï¿½F to +122ï¿½F [-30ï¿½C to +50ï¿½C]

Storage Temperature Range	-40ï¿½F to +176ï¿½F [-40ï¿½C to +80ï¿½C]

Housing	NEMA 2, IP54

Agency Listings	cULus acc. To UL 873 and CAN/CSA C22.2 No. 24-93

Noise Level (Motor)	<30 dB (A)

Quality Standard	ISO 9001

Operating Range Y	2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 ?, 1/4 W resistor) between 0% and 100%

Direction of Rotation (Fail-Safe	reversible with CW/CCW mounting

Position Indication	visual indicator, 0ï¿½ to 95ï¿½ (0ï¿½ is full spring return position)

Running Time (Fail-Safe)	<25 sec @ -4ï¿½F to 122ï¿½F [-20ï¿½C to 50ï¿½C], < 60 sec @ -22ï¿½F [-30ï¿½C]

Noise Level (Fail-Safe)	<62 dB (A)

Feedback Output U	2 to 10 VDC (max 0.7 mA) for 95ï¿½

Electrical protection	actuators are double insulated

Override Control	Minimum, Open, Closed via spring Minposition adjusts on actuator cover between 0 and 100% (scaled 0 to 1)

Humidity	max. 95% RH non-condensing

Shaft Diameter	3/8? to 1/2? round, centers on 1/2?

Torque	35 in-lbs [4 Nm] minimum

Housing Materia	zinc coated steel

SH8	Push rod for KG6 & KG8 ball joints (36? L, 5/16? diameter)

ZG-DC1	Damper clip for damper blade, 3.5? width.

ZG-DC2	Damper clip for damper blade, 6? width.

ZS-100	Weather shield - galvaneal (13? L x 8? W x 6? D).

ZS-150	Weather shield - PC w/ foam seal (16? L x 8-3/8? W x 4? D).

ZS-260	Explosion proof housing

ZS-300	NEMA 4X, 304 stainless steel enclosure.

TOOL-06	8 mm and 10 mm wrench

PS-100	Actuator power supply and control simulator

SGA24	Positioner control for modualting actuators (surface mount).

SGF24	Positioner control for modulating actuators (flush mount).

ADS-100	Analog to digital switch for modulating actuators.

ZG-R01	4 to 20 mA adaptor, 500ï¿½, 1/4 W resistor w 6? pigtail wires.

ZG-X40	120 to 24 VAC, 40 VA transformer.

PTA-250	Pulse width modulation interface for modulating actuators

IRM-100	Input rescaling module for modulating actuators.

KG8	Ball joint for 5/16? diameter rod, 90ï¿½, galvanized steel

KG10A	Ball joint for 3/8? diameter rod, zinc plated

SH10	Push rod for KG10A ball joint (36? L, 3/8? diameter).

ZG-R02	50% voltage divider kit (resistors with wires).

ZG-SGF	Mounting plate for SGF.

ZG-109	Right angle bracket for ZS-260

ZG-110	Stand-off bracket for ZS-260.

ZS-101	Base plate for ZS-100

ZS-300-5	NEMA 4X, 316L stainless steel enclosure

ZS-300-C1	1/2? shaft adaptor, standard wtih ZS-300(-5).

ZS-300-C2	3/4? shaft adaptor for ZS-300(-5).

ZS-300-C3	1? shaft adaptor for ZS-300(-5)

KH12	Univ. crankarm, slot 21/64? w, for 3/4? to 1? dia. shafts.

KH8	Univ. crankarm,slot 21/64? w,for 3/8? to 11/16? dia. shafts.

20477-00001	Honeywell logic module bracket.

AV6-20	6.7? shaft extension for 1/4? to 3/4? diameter shafts.

IND-LF	LF position indicator.

K6 US	Standard LF clamp (3/8? to 1/2?).

K6-1	LF clamp (1/2? to 3/4?).

KG6	Ball joint for 5/16? diameter rod, zinc plated.

KH6	Univ. crankarm, slot 1/4? w, for 3/8? to 11/16? dia. shafts.

KH-LF	LF crankarm (with 1/2? diameter shaft pass through)

KH-LFV	V-bolt Kit for KH-LF.

LF-P	Anti-rotation bracket LF

ZDB-LF	Angle of rotation Limiter for LF

ZF8-LF	8x8 mm form fit adaptor for LF

ZG-112	LF right angle bracket (4-1/2? H x 5-1/2? W x 2-1/2? D)

ZG-LF112	LF crankarm adaptor kit (includes ZG-112).

ZG-LF2	LF crankarm adaptor kit (T bracket included).

ZG-LMSA-1	Shaft extension for 3/8? diameter shafts (4? L).

ZG-LMSA-1/2-5	Shaft extension for 1/2? diameter shafts (5? L)

ZG-ECON1	Honeywell ECON retrofit kit with module bracket.

ZG-ECON2	Honeywell ECON retrofit kit without module bracket

Operation

The LF series actuators provide true spring return operation for reliable fail-safe application and positive close-off on air tight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator. The LF series provides 95ï¿½ of rotation and is provided with a graduated position indicator showing 0 to 95ï¿½. The LF24-SR-E US uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuator?s exact position. The ASIC monitors and controls the brushless DC motor?s rotation and provides a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. Power consumption is reduced in holding mode. See wiring diagrams for LF24-SR-E US for more details on 3-position control.