Johnson Controls M9208-GG Serie Guia De Instalacion página 3

English
READ THIS INSTRUCTION SHEET AND THE SAFETY WARNINGS
CAREFULLY BEFORE INSTALLING AND SAVE IT FOR FUTURE USE
General Features
The Proportional Electric Spring Return Actuators are direct-mount, spring, bidirectional
actuators and do not require a damper linkage.
The actuators are intended to be installed on an air damper in HVAC Systems.
The actuators operate on AC 24 V power at 50/60 Hz or DC 24 V power.
When the control signal is applied the actuator drives the damper to the operational
position, while evenly tensioning the integrated spring. After a power failure, the stored
energy in the spring immediately brings the damper to the safety position.
Figure 1: Dimensions in mm
Figure 2: Side A and B of actuator
Side A: CCW Spring Return Direction
Side B: CW Spring Return Direction
(a). Auxiliary switch adjuster
(b). Adapter for round shaft 8 to 16 mm or square shaft 6 to 12 mm
(c). Mode selector
(d). Manual Override
(e). Manual Override lock shaft
The actuators are controlled by 0(2)310 V DC or 0(4) to 20 mA with Field Furnished
500 ohm 0.25 W minimum resistor.
Selection Switch for Direct and Reverse Action and signal input range (see "Calibration
(CAL) Function").
IMPORTANT:
When calculating the torque required to operate dampers, it is essential
to take into account all the data supplied by the damper manufacturer.
Installation and adjustment
Figure 3: Fitting the Antirotation Bracket on the Damper Frame or Duct
(a). M3 x 10 mm. Self - Drilling Sheet Metal Screw (Two Locations)
(b). Anti-rotation Bracket
(c). Damper Frame
Figure 4: Changing the position of the coupler
(a). Coupler
(b). Locking clip
1.
Remove the Locking Clip
2.
Mount the coupler on either Side A or Side B of the actuator
3.
Snap the locking clip into the coupler groove
Figure 5: Allowed shaft length
Attach the actuator to the damper spindle by means of the adapter and secure the
Anti-rotation Bracket with the screws provided.
WARNING: Do not install or use this Electric Spring Return Actuator in
or near environments where corrosive substances or vapors could be
present. Exposure of the electric actuator to corrosive environments
may damage the internal components of the device, and will void the
warranty.
Figure 6: Angle of rotation limiting
Using the M9208-603 the angle of rotation can be limited. The actuator is factory set for
95° rotation, and its range is limited in 5° increments to a minimum of 35°. Attaching the
stroke-limiting stop in the furthest mounting position reduces the rotation range of the
actuator by 5°. Each progressive position reduces the rotation range on additional 5°.
Selecting the direction of rotation
For CCW spring return direction, mount the actuator to the damper shaft so that Side A
of the actuator is away from the damper as illustrated in Figure 2. To change the spring
return direction to CW, mount the actuator to the damper shaft so that Side B of the
actuator is away from the damper.
Wiring
WARNING: The electrical connections for the actuators must be
executed in accordance with the relevant legal requirements.
In order to avoid any personal injury or damage to the equipment or
other property, always isolate the power supply before commencing
any work on the electrical wiring. In order to avoid danger to property, it
is important for the equipment to be used solely for which it is
intended.
Wiring Diagrams
WARNING: The integrated circuits in the actuator are sensitive to
static electricity. Take suitable precautions.
IS_M9208-GGx-1_14-88360-2447_Rev. C_10 2017
Figure 7: Proportional Control 0(2)...10 V DC Wiring Diagram
Figure 8: Proportional Control 0(4)...20 mA Wiring Diagram
Figure 9: Master-Slave Application
Figure 10: Control Wiring Diagram (Overrides)
IMPORTANT:
Do not install multiple M9208-GGx-x Series Actuators connected to the
same mechanical load. Master-Slave application of M9208-GGx-x Series Actuators
requires that each actuator be connected to independent loads.
Setup and Adjustment
Auxiliary Switches (GGC Model Only)
Figure 11: Auxiliary Switch Wiring Diagram
WARNING: Disconnect each of multiple power supplies before making
electrical connections. More than one disconnect may be required to
completely de-energize equipment. Contact with components carrying
hazardous voltage can cause electric shock and may result in severe
personal injury or death.
These models include two integral auxiliary switches, one fixed (S1) and one adjustable
(S2), with a switch adjuster accessible on either face of the actuator (as illustrated in
Figure 2). The nominal factory setting for S1 Auxiliary Switch is 11° closing, and the
nominal factory setting for S2 Auxiliary Switch is 81° opening (relative to a 0 to 90°
rotation range).
The switch point of S2 Auxiliary Switch is independently and continuously adjustable
from 20° to 85° (relative to a 0 to 90° rotation range).
Use the method in the following example for the most accurate positioning of S2
Auxiliary Switch.
1.
Move the actuator to the full spring return position.
2.
Rotate the switch adjuster until it points to the desired switch point.
3.
Connect S2 Auxiliary Switch to a power source or an ohmmeter, and apply power to
the actuator. The actuator moves to the fully open position and holds while power is
applied.
4.
Observe the switch point. If required, repeat Steps 2 and 3.
IMPORTANT:
Use the Electric Spring Return Actuator only to control equipment
under normal operating conditions. Where failure or malfunction of the electric
actuator could lead to personal injury or property damage to the controlled equipment
or other property, additional precautions must be designed into the control system.
Incorporate and maintain other devices such as supervisory or alarm systems or
safety or limit controls intended to warn of, or protect against, failure or malfunction of
the electric actuator.
Figure 12: Mode Selection
Direction of Action
The Proportional Electric Spring Return Actuators are factory set for Direct Acting (DA)
operation. In DA mode, applying an increasing input signal to the control input drives the
actuator away from the spring return position. Reverse Acting (RA) operation is also
available. In RA mode, applying an increasing input signal to the control input drives the
actuator toward the spring return position. Figure 11 indicates how to set the mode
selection switch to change the behavior of the actuator.
Calibration (CAL) Function
The CAL function enables the actuator to redefine the selected input signal range
proportionally across a reduced rotation range. The actuator maintains calibration when
power is lost or removed.
Follow these steps to calibrate the input signal range:
1.
With power applied to the actuator, move the mode selection switch to the CAL position
and leave it in this position for approximately 5 seconds. The actuator begins rotating
until the end-stops are found.
2. Move the mode selection switch to the desired input signal range. Selection can be
made while the calibration process is in progress, or after it is complete. The selected
input signal is proportionally reconfigured to the reduced rotation range.
Note:
During normal operation, if the actuator stroke increases due to seal or seat wear,
input signal are automatically reconfigured to the increased rotation range in
approximately 0.5° increments.
3.
If the actuator mounting position is changed or if the linkage is adjusted, repeat Step 1
and Step 2 to repeat the CAL function.
Note:
The mode selection switch must remain out of the CAL position for at least 2
seconds before re-initiating the CAL function.
Note:
If the mode selection switch is left in the CAL position, the actuator defaults
to 0-10 V input signal range, DA.
This document is subject to change without notice 1