MEP-4xxx Direct-Coupled Actuators (40 to 90 in-lb.)
4
Applications Guide, AN0513A Rev. J
Actuator Torque Selection
Damper manufacturers should provide information
about the required minimum actuator torque. If
that information is not available, use the following
general guidelines to calculate the required torque.
(Square feet for a rectangular duct can be calculated
by multiplying the height and width in inches and
then dividing by 144.)
After minimum torque is known, see the actuator
data sheets to select the appropriate model.
Heat/Cool/VAV Applications (with the CTE-5202 Thermostat)
MEP-4xxx actuators can be used in single zone pro-
portional
heating (baseboard heaters) and
cooling
(chilled beams) with valves or SCR control as well as
pressure-dependent VAV applications.
For details of
a variety of sample applications, see the
(For an example of a fail-safe application on an
.)
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
24 VAC
~
–
(Phase)
(Neutral)
24 V
A
C
Common
Input
Cooling Valve
24 V
A
C
Common
Input
Heating Valve
~
T
T
AI1
AO
1
AO
2
CTE-5202
Thermostat
24 VAC @ 5 VA
~
–
(Phase)
(Neutral)
(5K–10K
Ohm Resistor
between AI1
and Common
for Heating
Mode Only)
NC SPST
Relay
(Override
to Fully
Closed)
MEP-4002
Actuator
24 V
A
C
Common
Input
Out
Chilled
Beam
4-Pipe
Heating
and
Cooling
Pressure Dependent VAV with
Auto and Override to Fully Closed
Damper Type
Opposed Blades Without Seals
Parallel Blades Without Seals
Opposed Blades With Seals
Parallel Blades With Seals
Up to 1000 FPM
3 in-lb. per square foot
4 in-lb. per square foot
5 in-lb. per square foot
7 in-lb. per square foot
1000 to 2500 FPM
4.5 in-lb. per square foot
6 in-lb. per square foot
7.5 in-lb. per square foot
10.5 in-lb. per square foot
2500 to 3000 FPM
6 in-lb. per square foot
8 in-lb. per square foot
10 in-lb. per square foot
14 in-lb. per square foot
