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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
Section 3 System Design
Table 3.2.4.1.1a TF Nozzle Coverages
Volume
1,440 ft³ per nozzle
(40.77 m³ per nozzle)
Maximum
Area
120 ft² per nozzle
(11.14 m² per nozzle)
Maximum
Height
20 ft (6096 mm)
Maximum
Side Length
15 ft (4572 mm)
Table 3.2.4.1.1b Maximum Standard Coverage Per Nozzle
Hazard Height
ft (mm)
Longest Side
ft (mm)
Area
ft² (m²)
Volume
ft³ (m³)
12 or less
(3658 or less)
15 (4572) 120 (11.14) 1440 (40.77)
13 (3962) 15 (4572) 110.7 (10.28) 1440 (40.77)
14 (4267) 15 (4572) 102.8 (9.55) 1440 (40.77)
15 (4572) 15 (4572) 96 (8.91) 1440 (40.77)
16 (4877) 15 (4572) 90 (8.36) 1440 (40.77)
17 (5181) 15 (4572) 84.7 (7.86) 1440 (40.77)
18 (5486) 15 (4572) 80 (7.43) 1440 (40.77)
19 (5791) 15 (4572) 75.8 (7.04) 1440 (40.77)
20 (6096) 15 (4572) 72 (6.68) 1440 (40.77)
3.2.4.1.2 Temperature Limitations
e operating temperature range for the system components used in Standard Total Flood applications is
-40°F to 120°F (-40°C to 49°C).
3.2.4.1.3 Agent Application
Each Total Flood Nozzle must discharge a minimum of 2.09 lbs (0.95 kg) of dry chemical agent per second
when mounted at a height of 12 ft (3658 mm) or less (a minimum flow rate of 2.09 lb/s (0.95 kg/s)). Each
Total Flood nozzle must discharge a minimum of 2.37 lbs (1.07 kg) of dry chemical agent per second when
mounted at a height between 12 ft (3658 mm) and 20 ft (6096 mm) (a minimum flow rate of 2.37 lb/s (1.07
kg/s)). e Janus Design Suite® Flow Calculation Software will determine the amount of dry chemical
agent required to meet these flow rates based on the hazard dimensions and number of nozzles required.
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