2.10.1
Refrigeration Alarm System
Provide an electrically supervised refrigeration alarm system. Operation
of any high-temperature alarm devices shall cause an alarm to register as
follows:
a.
Lamp and horn at local alarm panel
b.
Annunciator panel shall light up and identify which cooler is
malfunctioning
c.
Alarm bell shall ring
2.10.2
Refrigeration Local Alarm Panel
Provide local alarm panel adjacent to refrigerator. Alarm panel shall
include alarm lamp, "power on" lamp, alarm test switch, reset switch, an
alarm line supervisory meter, alarm silencing switch, high temperature
alarm device entrapment manual switch, alarm horn, and required relays.
System shall normally work off 120 volts a.c. and transfer automatically to
24 volt d.c. operation in the event of power failure. The d.c. power shall
be from rechargeable batteries and operate the system for a minimum of 24
hours in supervisory condition and 15 minutes in alarm condition. The
power supply shall be capable of fully recharging the batteries (as well as
powering the system) within 36 hours.
2.10.3
Annunciator Panel
Provide an electrically supervised annunciator panel. Provide the panel
adjacent to local alarm panel. Cover shall be such as to prevent tampering
and yet allow full viewing of annunciator lamps and zone identification
lettering. Detector loops shall be electrically supervised by the remote
alarm panel. Panels shall be equipped with terminals for all necessary
wiring. Annunciator panel shall be so connected to detection panel so that
zone lights shall be battery-powered in case of electrical failure.
2.10.4
High Temperature Alarm Device
Each refrigerated room shall have a high temperature alarm device of the
remote bulb type with minimum 1 1/2 meters 5 feet of capillary.
Temperature range shall be minus 34 degrees C to plus 10 degrees C 30
degrees F to plus 50 degrees F, with adjustable differential of not less
than 2 to 5 degrees C 4 to 10 degrees F.
2.11
COOLING TOWER WATER TREATMENT SYSTEM
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NOTE: If the activity has a cooling water treatment
contract in effect, ensure that the system specified
is compatible with it.
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Shall automatically feed chemicals, and bleed system water to prevent
scale, corrosion, and biological growths. The system shall include
chemical feed pump, tank, bleed-off solenoid valve, electric impulse water
meter, electric timer, and conductivity controller. Provide a polyethylene
tank and injection valve assembly for each feed pump.
SECTION 15602N
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