Connection And Operation Of Temperature Control Devices - Greenheck FSD-311V Installation, Operation And Maintenance Instructions

6. CONNECTION AND OPERATION OF TEMPERATURE
RESPONSE DEVICES (RRL STANDARD, OCI OPTION,
AND TOR 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 Fig.
4 for wiring of the RRL thermostat.
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. 5 & 6 for wiring of
the OCI option.
TOR - The TOR (temperature override device) option
incorporates two thermostats with fixed settings (usually
165°F [74°C] and 350°F [177°]). The primary sensor
(the sensor with the lower temperature setting) can be
bypassed by an external electrical signal allowing the
damper to reopen until the temperature reaches the
setting of the secondary sensor (the sensor with the
higher temperature setting). When the temperature of the
secondary sensor is exceeded the damper closes and
remains closed thereafter (Figure 7).
The TOR assembly also contains a single pole, double
throw switch used to indicate damper blade position. The
switch provides a positive open or closed signal when
used in conjunction with remote indicator lights. See
Fig. 7 for wiring of the TOR thermostats and indicator
switches.
If either the TOR or the 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.
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 (Fig. 4, 5, 6 & 7)
Integral Switch Type: Single Pole, double throw
Electrical Capacity: 10 Amps, 1 /3 hp, 120 or 240 Vac
Temperature Limit: 165° F (standard primary sensor)
212° F ( optional primary sensor)
250° F ( secondary sensor )*
350º F (secondary sensor)*
* based on actuator temperature rating
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
Fig. 4 RRL Wiring
Fig. 5 OCI Wiring
Fig. 6 RRL/OCI Wiring
Fig. 7 TOR Wiring
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