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Watchtour panel shall be constructed of 14 gage sheet steel, with 38 mm 1
1/2 inch flange on all sides, and cover for mounting devices hinged to
frame at top. Hinge shall be continuous piano-type hinge. Overall general
dimensions indicated are maximum dimensions. Coordinate mounting
dimensions and support requirements with masonry work.
2.1.2.2
Finish
Surfaces of the panel, except that containing the front, shall be prime
finished with rust inhibiting paint and two coats of hammertone finish gray
enamel. A reverse silkscreen polyester plastic film or lexan panel with
nomenclature shall be attached to the front portion.
2.1.3
Start Station
The watchtour "start" station shall be unembossed, nontactile, momentary
contact membrane type switches. Operating force of membrane type switches
shall be 2.22 N 8 ounces. Membrane switches shall be supplied with silver
contacts and proper circuitry to perform functions specified.
2.1.4
Visual Indicators
Visual indicators shall be T 1 3/4 light emitting diodes (LED), with
resistors and protective diodes as required for operation of 24 V ac. The
indicators shall be rated for not less than 50,000 hours of operation at 20
milliamps ac, and produce a minimum of 147 and 570 lumens/watt for green
and yellow devices respectively. Resistors shall be sized according to the
manufacturer's instructions and adjusted to produce uniform brightness
among LEDs. Resistors and protective diodes shall be mounted on stand-off
terminal blocks mounted adjacent to the LED served, on the underside of the
panel. Mounting hardware shall not be visible from the face of the panel.
Resistors and protective diodes may be an integral part of the LED. Include
a red LED in the panels for each electrically controlled and monitored door.
2.1.5
Pushbutton
The watchtour panel shall contain a "press to test" pushbutton which shall
test Visual and Audible indicators.
2.1.6
Auxiliary Relays
Auxiliary relays shall be general purpose, glass enclosed socket type with
24 V ac control coil, and with industry standard pin arrangement. Relays
shall be rated for continuous duty. Operating voltage range shall be
within plus or minus 10 percent of nominal voltage. Contact arrangement
shall be two pole double throw rated at not less than five amperes at 24 V
ac. Sockets with screw type terminals rated at five amperes shall be
provided for each relay.
2.1.7
Control Power Transformer
Control power transformer shall be provided to furnish 24 V ac power to the
watchtour system. Transformer volt-ampere rating shall be not less than
one and one half times the sum of the volt-ampere rating of all the relays
on the watchtour system. Transformer primary voltage shall be 120 volts.
Provide transformer secondary with glass cartridge fuse rated at 125
percent of transformer full load current.
SECTION 13799
Page 7
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