Trane Performance Climate Changer Installation, Operation And Maintenance Manual page 219

Field Installation Instructions
Motor Pack Contents
1. Actuator
2. Actuator Bracket
3. Actuator Arm Assembly
4. Connecting Links
5. Actuator Spring
6. 1/4-20 Screws and Nuts
7. #10 Screws and Nuts
All necessary hardware included
1. The MP-100A motor pack is designed for installation on
Model WD-100 series backdraft dampers only. When
properly installed, the damper will be horizontally mounted
(air flow up) and the motor pack will be on top of the damper.
2. Attach connecting link(s) to the damper link using the #10
hardware along with the bronze bushing(s) (see detail "B").
Use position "A" on most applications. Position "B" can be
used on larger dampers when a negative pressure is present.
The damper blades can be lifted to the open position to
provide easier access when attaching the connecting link(s)
to the damper link. Tighten all fasteners.
Note: Check that the connecting links are over the
bushing(s) and not pinched between the end of the bushing
and the screw or damper link.
3. Attach the motor pack assembly to the damper frame with
the 1/4 in. hardware provided. Assemble the connecting
link(s) to the actuator arm assembly using the #10 hardware.
The damper blades should be closed during this connection.
The angle between the connecting links and the actuator
arm should be approximately 135 degrees with a slight
tension on the spring. Tighten the fasteners between the
connecting link and the actuator arm assembly. Fasteners
should be placed as far apart as possible. This will provide
greater stability to the linkage. Operate the damper manually.
Verify that the linkage fasteners do not interfere with any
components of the assembly and that the damper blades
close completely when released.
Note: The spring can be adjusted to provide more or less
closing force. It is important not to use too much spring
tension; use just enough to help close the damper. Too much
tension could impair damper opening.
To adjust the spring, unhook the spring from the actuator
bracket and reattach to the next hole that provides more or
less tension.
4. Actuators are supplied with junction boxes and covers.
When wiring, make sure the supply voltage agrees with the
actuator voltage. On dual voltage motor packs, be sure
to connect the proper motor leads for the correct voltage
and insulate any unused wire. The voltage of each specific
model is stamped into the actuator housing or on a label
that is affixed to the actuator (see page 2 for typical wiring
diagrams).
Motor packs 24V (60 Hz)
Stall Amps .740
Spec ID# 3753
440V (60 Hz) 120V (50/60 Hz) 208V (50/60 Hz) 220V (50/60 Hz)
.047 .110
3752 3751
Multi Products MP-100A Motor Pack
UL Listed Electric Actuators With Spring Return
For Use With WD-100 Series Dampers
1
Single Panel
3
5
4
7
Position B
Position A
5. If the damper fails to operate properly, check for one of the
following causes:
• Check for an 'out of square' or racked damper
• Check for mounting screws interfering with the blade
and linkage rotation
• Spring tension too great
• Excessive voltage drop
• Excessive negative pressure in the building
If the motor pack fails to function:
• Check for correct voltage
• Check for proper wiring
Motor Pack Quantity
One or two motor packs may be required depending on
damper size. Single panel dampers have one column of
blades and one actuator is installed as shown in the Single
Panel view above. Double panel dampers have two columns
of blades and one actuator is installed as shown in the
Multiple Panel view above.
Actuator Specifications
MP-100A motor pack uses a single phase 60 Hz (50 Hz
optional) shaded pole stall type impedance protected electric
actuators and are supplied in various voltages (see chart
below). For 277, 575 or 600 volt operation a transformer and a
115-volt motor pack is required.
.050 .062
3751 3751
Part Number 463548
Detail C
135°
Double Panel
2
6
Damper
Link
Detail B
24V (50 Hz) 380V (50 Hz)
.100
2651-A 2663-C
.098