OPERATOR MANUAL // SECTION 1
TECHNICAL DESCRIPTION
HONEYWELL
8
Electrical Power Requirements:
Connectors:
WECO type screw connectors, recommended
Wire: 18 to 24 AWG
Input Voltage range:
24 Volts DC nominal, 20.5 to 32 Volts DC
Normal Operation Current: 68 mA nominal (72 with optional
MA420-4 Module)
Fire Alarm Current:
75 mA nominal (95 with optional MA420-4
Module)
Analog Current Output:
4 or 20 mA with optional MA420-4 Module.
Relay Contact:
Rating:
0.5 Amp at 120 Volt AC or 1 A at 24 V DC
resistive
Fire relay:
N.O. and N.C. contacts (Latching/Non-Latching,
switch selected)
Verification relay:
N.O. and N.C. contacts (Adjustable time from
0 to 30 seconds)
Fault relay:
N.O. and N.C. contacts
1.1.2
Applications
Applications of the Model SS4-AS/-AS2 Detectors include storage warehouses of
Ethanol, Methanol, and Methane (Natural Gas) and Hydrogen gas, among others.
1.1.3
Detector Locations
For unobstructed performance, considering Detector locations in application
areas, avoid sources, other than fire, which may cause false alarms, such as
operations utilizing welding or gas torch equipment, high power sources of EMI
or RFI, or artificial lighting pointed directly at the Detector. Locations experiencing
strong mechanical or acoustical vibrations should also be avoided. For optimum
performance, locate the Detector(s) as close as possible to the potential fire
source, preferably, along the axis of the vision cone. Install enough Detectors to
completely eclipse the fire hazardous area. Assure accessibility for the Detector
lens cleaning, as well as best possible protection and/or cleaning from fog, rain,
ice, dust, hazardous atmospheres, and other adverse elements. If necessary,
utilize the Steel Swivel Mount (Model SM2) or 316 Stainless Steel Swivel Mount
(Model SM4) for greater flexibility in mounting locations (See Figures 4 and 5).
