IM-P344-01 CTLS Issue 4
IM-P344-01 CTLS Issue 4
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AEL3 Electric Linear Actuators AEL3 Electric Linear Actuators
1.15 Freezing
Provision must be made to protect products which are not self-draining against frost damage in
environments where they may be exposed to temperatures below freezing point.
1.16 Disposal
Unless otherwise stated in the Installation and Maintenance Instructions, this product is recyclable
and no ecological hazard is anticipated with its disposal providing due care is taken.
1.17 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment Law, when
returning products to Spirax Sarco they must provide information on any hazards and the precautions
to be taken due to contamination residues or mechanical damage which may present a health,
safety or environmental risk. This information must be provided in writing including Health and
Safety data sheets relating to any substances identified as hazardous or potentially hazardous.
2.1 Use
AEL3 series electric linear actuators are for use with Spira-trol two-port control valves and QL three-port
valves. Actuators will normally be supplied fitted to the control valve. When supplied separately, ensure the
actuator selected is capable of giving the force necessary to close the two-port or three-port control valve
against the expected differential pressure. See the appropriate product specific Technical Information Sheet
for full details of the control valve.
The AEL3 actuators are motor operated actuators for on-off, modulating or special control of valves for
regulating control, cold, warm or hot water, steam or air and equivalent applications. Typical use is for HVAC
applications.
AEL3 actuators are available with 3 supply variants, 24 Vac/dc as standard, 230 Vac or 100 Vac, available
with additional modules, all being suitable for a VMD (Valve Motor Drive) input power signal or a 4-20 mA
or 0-10 Vdc control signal. The actuator has 3 speed options all selected via dip switches in the actuator.
Full details of the actuator types, and reference numbers, are given in Table 1 below:
Table 1 Series in the range AEL3
Product A = Actuator
Type E = Electric
Movement L = Linear
Series 3
Failure mode
E = Spring to extend
R = Spring to retract
X = No spring
Thrust (kN) 2
Stroke (mm) 20
Selectable speed
2 s/mm = 0.5mm/s selectable in the actuator via dip switches
4 s/mm = 0.25mm/s
6 s/mm = 0.16mm/s
Supply voltage
24 Vac and 24 Vdc
230 Vac or 100 Vac by fitting power modules
Control signal 24 to 230 V VMD, 0 - 10 Vdc and 4 - 20 mA
2.2 Operation
Depending on the type of connection (see connection diagram), the actuator can be used as a continuous
(0-10 V and/or 4-20 mA), 2-point (OPEN/CLOSE) or 3-point actuator (V.M.D.) (OPEN/STOP/CLOSE).
The running time of the actuator can be set with switches S1 and S2 according to the relevant requirements.
Switches S3 and S4 are used to configure the characteristic (equal-percentage, linear or quadratic).
2.3 Manual operation
The external crank handle enables manual positional setting. When the crank handle is folded out, the
motor is switched off. After the crank handle is folded back, the target position is approached again (without
initialisation). When the crank handle is folded out, the actuator remains in this position. Handle needs to
be rotated slowly to prevent damage to the actuator.
2. General product information
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