Part number 464603
IMO-XXX & SSIMO-XXX series
Fire and Combination Fire Smoke Dampers
Vertical or Horizontal Mount
Installation, Operation and Maintenance Instructions
International Maritime Fire Test Procedure
Code
USCG Type Approved
Approval Number 164.139/0007/0
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.
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.
WARRANTY
Greenheck warrants this equipment to be free from
defects in material and workmanship for a period of one
year from the purchase date. Any units or parts which
prove to be defective during the warranty period will
be repaired or replaced at our option. Greenheck shall
not be liable for damages resulting from misapplication
or misuse of its products. Greenheck will not be
responsible for any installation or removal costs.
Greenheck will not be responsible for any service work
or backcharges without prior written authorization.
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.
IF HEIGHT <=11.00 in. (279mm)
IF HEIGHT >11.00 (279mm)
6 in. (152mm)
18 in. (457mm)
6 in. (152mm)
18 in. (457mm)
6 in. (152mm)
6 in. (152mm)
18 in. (457mm)
18 in. (457mm)
Installation Instructions
Greenheck’s IMO dampers were tested per the International Maritime Organization’s Fire Test Procedure (FTP) code in a
Class A bulkhead and in a Class A deck for 60 minutes. The FTP code requires that the ductwork (coaming) be insulated
and that the damper be bolted or welded to the duct.
1. Insulating the Duct
The ductwork must be insulated a minimum of 6 in. (152mm) on the damper side and 18 in. (457mm) on the non-damper
side (see figures 1-4). Any US Coast Guard type approved insulation with an A60 rating can be used. The insulation is to be
installed on the duct with 0.106 in. (2.7mm) steel pins and 1.12 in. x 1.24 in. x 0.4 in. (28mm x 31mm x 10mm) steel clips.
2. Attaching Damper to Duct
The damper can be installed to the duct using either bolts or welding. If bolts are used , they are to be a minimum of 0.375
in. (9.5mm) diameter and 1 in. (25mm) long. The fasteners should be spaced 6 in. (152mm) OC and a maximum of 2 in.
(51mm) from the corners.
Horizontal Airflow- Vertical Damper mount
Fig. 1
Fig. 2
Vertical Airflow- Horizontal Damper mount
Fig. 3
Fig. 4
L1
DAMPER
INDICATOR
LIGHTS
L2
CLOSED POSITION OF THE DAMPER.
A BLUE MARKER INDICATE THE
THE SWITCH WIRES WRAPPED WITH
NOTE:
YELLOW
ELECTRICAL CAPACITY = 10AMP @ 120 / 240 VAC
YELLOW
YELLOW
YELLOW
NO
NO
S2
S1
BY OTHERS
L1
M
L2
ELECTRIC DAMPER
ACTUATOR OR PNEUMATIC
SOLENOID VALVE
PRIMARY TEMP
SENSOR
ELECTRICAL CAPACITY = 10 AMP @ 120 / 240 VAC
BLACK
ORANGE
P
NC
BLACK
WHITE/RED
Size Limitations
Damper model Maximum Single Maximum Overall size for
Section size Multi-section dampers
IMO-310 32 in. x 32 in. 64 in. x 32 in.
(813mm x 813mm) (1626mm x 813mm)
SSIMO-310 32 in. x 32 in. 64 in. x 32 in.
(813mm x 813mm) (1626mm x 813mm)
IMO-311 32 in. x 32 in. 64 in. x 32 in.
(813mm x 813mm) (1626mm x 813mm)
SSIMO-311 32 in. x 32 in. 64 in. x 32 in.
(813mm x 813mm) (1626mm x 813mm)
Manually operated dampers (IMO-310 & SSIMO-310)
Manually operated dampers utilize a spring and fusible link assembly to close the damper during elevated temperature
conditions. No electrical power is required for these models.
Motor operated dampers (IMO-311 & SSIMO-311)
Motor operated dampers are supplied with an electric thermal response device which cuts power to the spring return
actuator upon sensing an elevated temperatures. See below for electrical connections.
Connection and Operation of Temperature
Response Devices (RRL standard, OCI option,
RRL Wiring
and PRV option)
RRL - Dampers will be supplied with a thermostat-type
temperature response device, as a standard. The device is a RRL
(resettable link device), which only incorporates one thermostat
and therefore the damper remains closed as soon as its sensor
temperature is reached. The RRL does not contain blade
indication switches. Refer to Figure 5 for wiring of the RRL
thermostat.
If RRL is ordered with a pneumatic actuator, an EP switch is
required with an appropriate electric power circuit to allow the
electric thermostat to control the pneumatic actuator.
OCI - The OCI (open or closed indicator) option contains a single
pole, double throw switch used to indicate the damper blade
position. The switch provides a positive open or closed signal
when used in conjunction with remote indicator lights. Refer to
Fig. 7 for wiring of the OCI option.
PRV - The PRV (pneumatic relief valve) option is heat responsive
device used with pneumatic actuators. This can be used in place
of EP switch where a RRL is used. The PRV activates when
temperature in excess of the temperature of the fusible link are
detected. When the fusible link melts, air from the actuator is
exhausted to close the dampers. Pneumatic actuators are to be
piped per local code.
Fig. 5
OCI Wiring
Fig. 6
RATINGS
Integral Switch Type: Single Pole, double throw
Electrical Capacity: 10 Amps, 1/3 hp, 120 or 240 Vac
1/2 Amp, 125 Vdc; 1/4 Amp 250 Vdc
5 Amps, 120 Vac “L” (lamp load)
1.0 Amps, 24 Vac
1.5 Amps, 24 Vdc
Temperature Limit: 165° F (standard primary sensor)
212° F ( optional primary sensor )
Damper Maintenance
Dampers do not typically require maintenance as long as they are kept dry and clean. If cleaning is necessary,
use mild detergents or solvents. If lubrication is desired for components such as axle bearings, jackshaft
bearings and jamb seals, do not use oil-based lubricants or any other lubricants that attract contaminants such
as dust.
Dampers and their actuator(s) must be maintained, cycled, and tested in accordance with:
• The latest editions of NFPA 80, 90A, 92A, UL864, and local codes.
• Actuator manufacturer recommendations.
Damper Trouble Shooting
The following is a possible cause and correction list for common concerns with the dampers.
Symptom Possible Cause Corrective Action
Frame is ‘racked’ causing blades to Adjust frame such that it is square
bind on jamb seals and plumb
Actuator linkage loose Close damper, disconnect power, adjust
and tighten linkage
Damper does not
Defective motor Replace
fully open and/or
fully close
Screws in damper linkage Locate screws and remove
Actuator linkage hitting wall or floor Damper installed too far into wall. Move
out to line designated on damper label.
Contaminants on damper Clean with a non-oil-based solvent
(see Damper Maintenance)
RRL or TOR sensor
tripped
Damper does not
operate
Heat
No power supplied to the actuator
Push reset button located on backside
of RRL or TOR.
Copyright © 2007 Greenheck Fan Corporation
IMO-XXX series IOM Rev. 3 July 2007
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