Greenheck Marine Dampers - USCG Approved (464603) - Manual (Page 3)

Connection and Operation of Temperature
Response Devices (RRL standard, OCI option,
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. 6 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.
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)
OCI Wiring
Fig. 6
Fig. 5
RRL Wiring
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)
Size Limitations
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.