Greenheck AMD User Manual

Document number 474014

®

AMS & AMD Damper Series

Installation, Operation, and Maintenance Instructions

This manual is the property of the owner, and is required for future maintenance. Please leave it with the owner when the
job is complete.

SAFETY WARNING:

Improper installation, adjustment, alteration, service or maintenance can cause property damage,

injury or death. Read the installation, operating, and maintenance instructions thoroughly before

installing or servicing this equipment.

Airflow

AMS

AMD-42

Note: A minimum velocity of 300 fpm (1.5 m/s) is required.

RECEIVING AND HANDLING

Upon receiving dampers, check for both obvious and hidden damage. If damage is found, record all necessary
information on the bill of lading and file a claim with the final carrier. Check to be sure that all parts of the
shipment, including accessories, are accounted for.

Dampers must be kept dry and clean. Indoor storage and protection from dirt, dust and the weather is highly
recommended. Do not store at temperatures in excess of 100°F (37ºC).

Due to continuing research, Greenheck reserves the right to change specifications without notice.

Pre-Installation Guidelines

The basic intent of a proper installation is to secure the
AMS & AMD series damper into the opening in such a
manner as to prevent distortion and disruption of damper
operation. The following items will aid in completing the
damper installation in a timely and effective manner.

1) Check the schedules for proper damper locations within
the building. Visually inspect the damper for damage.

2) Lift or handle damper using sleeve or frame. Do not
lift damper using blades, linkage, actuators, pick­ups, or jackshafting. When handling multiple sections
assemblies, use sufficient support to evenly lift at each
section mullion (see drawing). Do not drag, step on,

apply excessive
bending, twisting, or
racking.

3) Do not install
screws in damper
frame that will
interfere with
unexposed blade
linkage and prevent
damper blades from
opening and/or
closing.

Spreader Bar

Attachments

Multi section dampers

Pre-Installation Guidelines

4) Damper must be installed into duct or opening square
and free of twist or other misalignment. Damper must
not be squeezed or stretched into duct or opening. Out
of square, racked, twisted or misaligned installations can
cause excessive leakage and/or torque requirements to
exceed damper/actuator design.

5) Damper and actuator must be kept clean, dry and
protected from dirt, dust and other foreign materials
prior to and after installation. Examples of such foreign
materials include but are not limited to:

a) Mortar dust
b) Drywall dust

e) Paint overspray

6) Damper should be sufficiently covered as to prevent
overspray if wall texturing or spray painting will be
performed within 5 feet (1.5m) of the damper. Excessive
dirt or foreign material deposits on damper can cause
excessive leakage and/or torque requirements and
inaccurate airflow measurement to exceed damper/
actuator design.

7) ACCESS: Suitable access (actuators maintenance, etc.)
must be provided for damper inspection and servicing.
Where it is not possible to achieve sufficient size access,
it will be necessary to install a removable section of duct.

c) Firesafing materials
d) Wall texture

Installation- Failure to follow instructions will void all warranties

1. Ensure the AMS or AMD series damper is mounted with
airflow straightener upstream of the damper.

2. Duct opening or opening square should measure 1/4

inch (6mm) larger than damper dimension and should be
straight and level.

3. Use shims between damper frame and duct opening or
opening space to prevent distortion of frame by fasteners
holding it in place. Brace at every horizontal mullion and
vertically brace at every 8 feet (2.4m) of damper width for
strength. Dampers in high velocity (2000 fpm [610m per
second]) may require more bracing.

Note: Greenheck dampers are specifically designed
and engineered for structural integrity based on model
and conditions. Attachment, framing, mating flanges,
and anchoring of damper assemblies into openings,
ductwork, or walls is the responsibility of the installer.
Design calculations for these retaining and supporting
members should be determined by field engineers for
that particular installation.

4. Individual damper sections, as well as entire multiple
section assemblies must be completely square and free
from racking, twisting, or bending. Measure diagonally
from upper corners to opposite lower corners of each

A

B

section.

5. Damper blades, axles, and linkage must operate without
binding. Before system operation, cycle dampers after
installation to assure proper operation. On multiple
section assemblies all sections should open and close
simultaneously.

6) Installing two section high AMD series together. AMD's
more than one section high will be shipped separately in
individual sleeves. The high and low pressure ports need
to be plumbed together and then plumbed back to the
pressure transducer.

Damper Sleeve

Pressure Transducer

Plumb the high pressure parts together

Plumb the low pressure parts together

C

E

Do not twist
or bow. Mount
damper plumb
in the opening.

2

AF = BE
AB = CD

D

F

Damper Sleeve

Electrical Guidelines

Electrical and/or pneumatic connections to damper actuators should be made in accordance with wiring and piping
diagrams developed in compliance with applicable codes, ordinances and regulations.

SAFETY CAUTION !

Verify power requirements before wiring actuator.

Greenheck is not responsible for any damage to, or

failure of the unit caused by incorrect field wiring.

Connect electrical connection to terminal strip as shown on drawing (see figure 1).

Electrical input may be needed for this

equipment. This work should be performed

SAFETY DANGER !

by a qualified electrician.

Setup and Operation for AMS and AMD Series Without Factory Supplied Controller

Each AMD and AMS is shipped with a highly accurate pressure transducer (+/- 0.25% of range) that results in optimal airflow
measurement accuracy (see Figure 1).The pressure transducer outputs a 0-10 VDC signal that is proportional to the pressure
measured by the airflow station. The high pressure limit of the transducer is set at the factory to optimize the resolution of
the reading. The selection is based on the maximum velocity of the application that was selected at the time the unit was
ordered. The selected transducer range is listed on a label affixed to the AMD or AMS (see example label below). Using
the high pressure limit of the transducer and the voltage output of the transducer the real-time pressure reading can be
calculated using the formula:

P

transducer

The pressure reading of the transducer can then be used to calculate the volumetric flow rate going through the AMS or AMD
using the formula:

= (Transducer Output Voltage) * (High Pressure Limit of Transducer) / 10

Formula 1

CFM = Damper Area*K*( P

Formula 2

The K & m values are damper specific constants that are listed on the label. The area of the damper is also listed on the
label.

Figure 1: BAPI transducer

transducer

m

)

Label 1: AMD/AMS Label

3