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MV & LV SERIES ENGINEERED DRY CHEMICAL FIRE EXTINGUISHING SYSTEM
OPERATION, DESIGN, & SERVICE MANUAL
REV C
Document # DOC324
Issued: April 26, 2018
Revised: March 22, 2022
UL FILE # EX27541
3.4.3.1 Work Area and Plenum, OFPSB 61
3.4.3.2 Ducts, OFPSB 62
3.5 Pipe Determination 64
3.6 Peripheral Equipment and Accessories 65
3.6.1 Control Panel 65
3.6.2 Accessories 65
3.7 Sample Equipment Order List 66
4 SYSTEM INSTALLATION 69
4.1 Mechanical Installation 70
4.1.1 Installing Cylinder Bracket Channels 70
4.1.2 Installing Discharge Piping 73
4.1.2.1 Threaded Pipe 73
4.1.2.2 Threaded Fittings 73
4.1.2.3 Grooved Fittings and Couplings 74
4.1.2.4 Pipe Reductions 74
4.1.2.5 Pipe Supports and Hangers 74
4.1.3 Installing Nozzles 75
4.1.4 Installing Cylinder Assembly 75
4.1.4.1 Installing Pressure Gauge Assembly 75
4.1.4.2 Installing Low-Pressure Supervisory Switch Assembly 75
4.1.5 Installing Discharge Pressure Switch 76
4.1.6 Installing Pilot Actuation Line 77
4.1.6.1 Installation Using Flex Hose 77
4.1.6.2 Installation Using Copper Tubing 77
4.1.6.3 Installation Using Schedule 40 Pipe 78
4.1.6.4 Installing Remote Nitrogen Actuation Cylinder 78
4.2 Electrical Installation 83
5 COMMISSIONING SYSTEM 85
5.1 System Review 85
5.2 Discharge Piping Pressure Test 86
5.3 Installing Pneumatic Valve Actuator 87
5.4 Installing Electric Valve Actuator 87
5.5 Installing Manual Valve Actuator 88
5.6 Warning Signs 88
5.7 Additional Considerations 88
5.8 Manual 90
5.9 Label 90
6 SYSTEM INSPECTION AND MAINTENANCE 91
6.1 Monthly Inspection 91
6.2 Maintenance 92
6.2.1 Semi-Annual Maintenance 93
6.2.1.1 Pressure Check 93
6.2.1.2 Cylinder Weighing 93
6.2.2 Annual Maintenance 93
6.2.3 Five Year Maintenance 94
6.2.4 Six Year Maintenance 95
6.2.5 Additional Notes on Maintenance 95
7 SYSTEM RECHARGE AND RESET 97
7.1 Cleanup Following Discharge 97
7.2 Piping and Nozzles 97
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