Document No: LT0122

F3200 Installation & Programming Manual

 

Applications

 

 

9.2

GAS FLOOD

9.2.1GENERAL

The following features of the F3200 make it well suited to "Gas Flood" control:

AZC Alarm Text for "pressure switch", "manual", can be used for the various inputs;

Zones can be programmed as latch/non-latch, MAF/non-MAF as required, e.g. non-latch, non-MAF, for "Gas Inhibit" input;

Zone range operand allows easy programming of "voting systems" on detector circuits e.g. 2 out of 3;

Open collector O/Ps can be programmed to drive LEDs such as "Gas Initiated", "Gas Inhibited", etc;

Programmable timers included as standard (0-250 sec);

Programmable relays, with supervision option;

Operation not fixed by hardware, as virtually any required logic equation for outputs (using AND, OR, NOT, XOR) can be entered;

Fuse protected battery-backed supplies available via 2A fuse and 6A fuse;

Standard hinged, screened 7U Gas Flood door available complete with LEDs, switches and looms for 1, 2, 3, 4 Gas Zones (Part Number ME0065 to ME0068 respectively);

Standard non-hinged, screened 1U Panel as per above for 1 Gas Zone (Part Number ME0069);

Standard Local Control Stations (LCSs) and AVI warning signs available. (LCS includes "Gas Start", "Gas Inhibit" switches, status LEDs). AVIs include AS2220 Alert and Evac tones and can be ordered with screens such as FIRE ALARM / DO NOT ENTER, etc.

Note that the following implementation has, as standard, supervision of only the Gas release relay output wiring, and not of the Stage 1 and Stage 2 warning signs. By allocating extra relays (or using the second pole) and fitting diodes at each sign, the warning sign circuits could be supervised (refer Figures 8.5.3, 8.6.2, 9.2.5 and 9.2.6).

9.2.2LOGIC & CONFIGURATION

A commonly used logic diagram for a dual circuit Gas Flood Zone (i.e. protected area, sometimes called 'risk') is shown in Fig 9.2.1. This can be used with ME0065-69 and one or more Local Control Stations (FP0570) per protected area.

The logic equations for it may be as follows.

where: OC1 = Gas Initiated LED (i.e. Timer Running) OC2 = Manual Activation LED (i.e. LCS Gas Start) OC3 = Gas Discharged LED

OC4 = System Inoperative (i.e. any isolate or fault in Gas Control System) OC5 = Gas Inhibited LED

Zone 1 = Detector Cct 1

Zone 2 = Detector Cct 2

Zone 3 = Gas Start (LCS)

Zone 4 = Gas Released (Pressure Switch)

Zone 5 = Gas Inhibit (LCS)

Zone 6 = Gas Isolated (i.e. Gas Isolate switch operated, see note 3)

Zone 7 = Lock-off Valve (if required, see note 9)

Issue 2.7

5 July 2001

Page 9-9

Page 177
Image 177
Tyco F3200 manual GAS Flood, Logic & Configuration

F3200 specifications

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