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
WaRRaNty
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.
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.
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.
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.
Size limitations
Damper model
Maximum Single
Section size
Maximum Overall size for
Multi-section dampers
IMO-310
32 in. x 32 in.
(813mm x 813mm)
32 in. x 32 in.
(813mm x 813mm)
32 in. x 32 in.
64 in. x 32 in.
(1626mm x 813mm)
64 in. x 32 in.
(1626mm x 813mm)
64 in. x 32 in.
SSIMO-310
IMO-311
(813mm x 813mm)
32 in. x 32 in.
(1626mm x 813mm)
64 in. x 32 in.
SSIMO-311
(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.
VA
ELECTRICAL CAPACITY = 10 AMP @ 120 / 240
C
connection and Operation of temperature
Response devices (RRl standard, OcI option,
and PRv option)
RRl Wiring
L1
L2
NC
BLACK
BLACK
WHITE/RED
ORANGE
M
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.
P
PRIMARY TEMP
SENSOR
ELECTRIC DAMPER
ACTUATOR OR PNEUMATIC
SOLENOID VALVE
Fig. 5
NOTE: THE SWITCH WIRES WRAPPED WITH
A BLUE MARKER INDICATE THE
CLOSED POSITION OF THE DAMPER.
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.
ELECTRICAL CAPACITY = 10AMP @ 120 / 240VAC
L1
L2
OcI Wiring
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.
BY OTHERS
S1
YELLOW
YELLOW
YELLOW
YELLOW
DAMPER
INDICATOR
LIGHTS
NO
NO
S2
Fig. 6
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.
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
bind on jamb seals
Adjust frame such that it is square
and plumb
Actuator linkage loose
Close damper, disconnect power, adjust
and tighten linkage
Damper does not
fully open and/or
fully close
Defective motor
Replace
Screws in damper linkage
Actuator linkage hitting wall or floor
Locate screws and remove
Damper installed too far into wall. Move
out to line designated on damper label.
Clean with a non-oil-based solvent
(see Damper Maintenance)
Contaminants on damper
RRL or TOR sensor
tripped
Heat
Push reset button located on backside
of RRL or TOR.
Damper does not
operate
No power supplied to the actuator
Copyright © 2007 Greenheck Fan Corporation
IMO-XXX series IOM Rev. 3 July 2007
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