Specifications

Equipment list B
92 of 155
Models
Gentex Models Gentex Part
Numbers
Description
GCC24CR 904-1209-002 Horn/Strobe, Ceiling Red Multi Candela
(GCC)
GCC24CW 904-1211-002 Horn/Strobe, Ceiling White Multi Candela
(GCC)
WGEC24-75WR 904-1217-002 Weatherproof Horn/Strobe (Gentex) Red
System Sensor Compatible NAC Devices
The Quaestor-SZU Releasing Fire Control Panel accepts compatible System Sensor NAC devices for use on the
special application outputs of NAC 1 and NAC 2. The number of compatible devices that NAC 1 and NAC 2 can
each safely operate is limited by a 500 mA current threshold. Installers must limit the population of compatible
devices in each NAC circuit by this 500 mA threshold.
As with any circuit, a circuit design is limited by the power source and device-loads connected to it. A combination of
device-loads can be safely installed in a circuit when the circuit is operated within the constraints of the power source
threshold. There are no exclusions for the amount of device-loads that can be safely installed in the circuit as long as
the maximum current load is below the output current available from the power source.
The Quaestor-SZU Releasing Fire Control Panel can also safely operate combinations of device-loads on NAC 1 and
NAC 2. These device-loads can include combinations such as strobes, horns, strobe/chimes, strobe/horns and speaker
strobes. The sum of this device-load combination is limited by the 500 mA available from each NAC output. Safety
High-Tech recommends designing and installing combinations of NAC circuits based on this “device-load” versus
“current-available” understanding.
Reference manufacturer data sheets for individual device loads and then total the loads to determine if the sum exceeds
the 500 mA threshold of each NAC output.
UL Listing Requirement
All control panel designs restrict the number of NAC devices installed in circuits based on the rated current threshold.
Some control panel designs further restrict the number of NAC devices installed in circuits based on device
synchronization in addition to the rated current threshold. These control panel designs can reduce the population of
NAC devices below the number of devices that would be considered for the rated current threshold.
NAC outputs of the Quaestor-SZU Releasing Fire Control Panel are not limited by conditions other than the
maximum rated current threshold. NAC outputs of the Quaestor-SZU Releasing Fire Control Panel can operate
combinations of Safety High-Tech authorized NAC devices as long as the circuit load does not exceed 500 mA.
The following statement is necessary for UL qualification and excludes device-loading combinations that are
common in most FACP installations:
SAFETY HI-TECH
Quaestor-SZU Releasing Fire Control Panel - Installation and Operation Manual
Revision E03.04
SHM80001