Janus Mv Series User manual

Mv Series and Lv Series
Engineered Dry Chemical
Fire Extinguishing Systems
Issued April 26, 2018
DOC324 REV C
(Revised March 22, 2022)
Operation, Design, & Service Manual
DRY-CHEMICAL EXTINGUISHING SYSTEM
UNIT - ENGINEERED TYPE
UL FILE # EX27541

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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
Contents
1 GENERAL INFORMATION 1
1.1 Listings and Approvals 2
1.2 Extinguishing Agent 3
1.3 Safety Considerations 3
2 SYSTEM COMPONENTS AND DESCRIPTION 5
2.1 Cylinder Assembly 6
2.1.1 Cylinder 6
2.1.1.1 Rupture Disc 6
2.1.1.2 Pressure Vent Port 6
2.1.1.3 Agent Fill Port 6
2.1.2 Dip Tube 7
2.1.3 Cylinder Valve 7
2.1.3.1 Mv Series Valve Features 8
2.1.3.2 Lv Series Valve Features 11
2.2 Trim Components 14
2.2.1 Pressure Gauge Assembly 14
2.2.2 Low-Pressure Supervisory Switch Assembly 15
2.2.2.1 Low-Pressure Supervisory Switch Conduit Adapter 16
2.2.3 Electric ValveActuator w Limit Switch 16
2.2.4 Manual Valve Actuator 17
2.2.5 Discharge Connection Fittings 18
2.2.5.1 Mv Series Fittings 18
2.2.5.2 Lv Series Fittings 18
2.3 Multi-Cylinder Arrangement Components 19
2.3.1 Remote Nitrogen Actuation Cylinder 19
2.3.2 Remote Pneumatic Actuation/Bracket Kit 19
2.3.3 Pneumatic Valve Actuator 20
2.3.4 Vent Check 20
2.3.5 Pilot Actuation Mid Line Tee 21
2.3.6 Male NPTAdapter 21
2.3.7 Pilot Actuation End Line Tee 21
2.3.8 Flex Hose 21
2.4 Explosion-Proof Actuation Components 22
2.4.1 Lever-Pull Manual Actuator 22
2.4.2 Manual/Pneumatic Actuator 22
2.4.3 Remote Pilot Actuation Tee 22
2.4.4 Pilot Actuation Check Valve 23
2.4.5 Explosion-Proof Low-Pressure Supervisory Switch Assembly 23
2.5 Supplemental Components 24
2.5.1 Manifold Check Valve 24
2.5.2 Discharge Pressure Switch 25
2.5.2.1 Explosion-Proof Discharge Pressure Switch, Self-Restoring 25
2.5.3 Discharge Manifold 26
2.5.4 Pressure Release Trip 29
2.5.5 Discharge Indicator 29
2.6 Discharge Nozzles 30
2.6.1 FixedOriceNozzles 30
2.6.1.1 Local Application, Overhead (LAOH) Nozzle 30

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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
2.6.1.2 Tankside (TS) Nozzle 30
2.6.1.3 Total Flood (TF) Nozzle 30
2.6.1.4 Three-Way Nozzle 31
2.6.1.5 Duct and Plenum (D/P) Nozzle 31
2.6.1.6 Screening (SCR) Nozzle 31
2.6.1.7 Total Flood, Perimeter (TFP) Nozzle 31
2.6.2 JSH Discharge Nozzles 32
2.6.3 NozzleBlow-O󰀨Caps 33
3 SYSTEM DESIGN 35
3.1 Hazard Analysis 35
3.1.1 Fuel Source 35
3.1.2 Choosing Proper System Type 36
3.2 General Purpose and Industrial Hazards 38
3.2.1 Local Application - Overhead 39
3.2.1.1 Nozzle Orientation 39
3.2.1.2 Temperature Limitations 39
3.2.1.3 Agent Application 39
3.2.2 Local Application - Tankside 40
3.2.2.1 Nozzle Orientation 40
3.2.2.2 Temperature Limitations 40
3.2.2.3 Agent Application 40
3.2.3 Total Flood - JSH Nozzles 41
3.2.3.1 Nozzle Orientation 41
3.2.3.2 Temperature Limitations 42
3.2.3.3 Agent Application 42
3.2.4 TotalFlood-FixedOrice 43
3.2.4.1 Total Flood - Standard Coverage 43
3.2.4.1.1 Nozzle Orientation 43
3.2.4.1.2 Temperature Limitations 44
3.2.4.1.3 Agent Application 44
3.2.4.2 Total Flood - Module Perimeter Coverage 45
3.2.4.2.1 Nozzle Orientation 45
3.2.4.2.2 Temperature Limitations 47
3.2.4.2.3 Agent Application 47
3.2.5 Screening Nozzle with Total Flood Applications 47
3.3 Vehicle Paint Spray Booth (VPSB) 49
3.3.1 Temperature Limitations 50
3.3.2 WorkArea Coverage, VPSB 50
3.3.2.1 Nozzle Orientation - Standard Work Area Coverage 51
3.3.2.2 Agent Application - Standard WorkArea Coverage 53
3.3.2.3 Module Perimeter Work Area Coverage 53
3.3.2.4 Module Perimeter Work Area Coverage - Nozzle Orientation 54
3.3.2.5 Module Perimeter Work Area Coverage - Agent Application 54
3.3.3 Plenum Coverage, VPSB 55
3.3.3.1 Plenum Coverage 58
3.3.4 Duct Coverage, VPSB 59
3.4 Open Front Paint Spray Booths (OFPSB) 60
3.4.1 Temperature Limitations 60
3.4.2 Agent Application 61
3.4.3 Open Front Paint Spray Booths (OFPSB) Nozzle Coverages 61

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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 WorkArea 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 ValveActuator 87
5.4 Installing Electric ValveActuator 87
5.5 Installing Manual ValveActuator 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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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
7.2.1 Pneumatic Actuation Piping 97
7.3 Recharging Agent Cylinder 98
7.3.2 Cleaning and Servicing The Valve Assembly 98
7.3.3 Recharge Procedure 100
7.4 Recharging Remote Nitrogen Actuation Cylinder 101
7.4.1 Removing The NitrogenActuation Cylinder 101
7.4.2 Servicing The Valve Assembly 101
7.4.3 Recharge Procedure 101
APPENDIX A - Safety Data Sheet 103
APPENDIX B - Assorted Charts & Worksheets 117
APPENDIX C - Auxiliary Parts 119
C.1 Legacy Components 120
C.1.1 Electric Valve Actuator w/o Supervision 120
C.1.2 Discharge Pressure Switch 121
C.1.3 Explosion-Proof Discharge Pressure Switch 121
C.2 Auxiliary Components 122
C.2.1 Explosion-Proof Pressure Switch, Manual Reset 122
C.2.2 Weather-Proof Pressure Switch, Self-Restoring 122
APPENDIX D - Alternate Nozzle Spacing Options 123

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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
Diagram Index
Figure 2.1.3.1a Mv Cylinder ValveAssembly 8
Figure 2.1.3.1b Mv Cylinder Valve w/ Trim Kit (Single Cylinder System) 9
Figure 2.1.3.1c Mv First Cylinder Valve w/ Trim Kit (Multiple Cylinder System) 10
Figure 2.1.3.3a Lv Cylinder ValveAssembly 11
Figure 2.1.3.3b Lv Cylinder Valve w/ Trim Kit (Single Cylinder System) 12
Figure 2.1.3.2c Lv First Cylinder Valve w/ Trim Kit (Multiple Cylinder System) 13
Figure 2.2.1 Pressure Gauge Assembly 14
Figure 2.2.2 Low-Pressure Supervisory Switch Assembly 15
Figure 2.2.2.1a Low-Pressure Supervisory Switch Conduit Adapter 16
Figure 2.2.2.1b Low-Pressure Supervisory Switch w/ Conduit Adapter (Sv Series Shown) 16
Figure 2.2.3a Electric Valve Actuator 16
Figure 2.2.3b Electrical ValveActuator w/ Limit Switch Wiring Diagram 17
Figure 2.2.4 Manual ValveActuator 17
Figure 2.2.5.1 Mv Series Fittings 18
Figure 2.2.5.2 Lv Series Fittings 18
Figure 2.3.1 Remote Nitrogen Actuation Cylinder 19
Figure 2.3.2 Remote Pneumatic Actuation/Bracket Kit 19
Figure 2.3.3 Pneumatic ValveActuator 20
Figure 2.3.4 Vent Check 20
Figure 2.3.5 Pilot Actuation Mid Line Tee 21
Figure 2.3.6 Male NPTAdapter 21
Figure 2.3.7 Pilot Actuation End Line Tee 21
Figure 2.3.8 Flex Hose 21
Figure 2.4.1 Lever-Pull Manual Actuator 22
Figure 2.4.2 Manual-Pneumatic Actuator 22
Figure 2.4.3 Remote Pilot Actuation Tee 22
Figure 2.4.4 NPT Style PilotActuation Check Valve 23
Figure 2.4.5 XP Low-Pressure Supervisory SwitchAssembly 23
Figure 2.5.1a Lv Manifold Check Valve 24
Figure 2.5.1b Mv Manifold Check Valve 24
Figure 2.5.2 Weather-Proof Discharge Pressure Switch, Manual Reset 25
Figure 2.5.2.1 Explosion-Proof Discharge Pressure Switch, Self Restoring 25
Figure 2.5.3a Typical Cylinder Spacing for 200 lb Cylinders 26
Figure 2.5.3b Typical Cylinder Spacing for 600 lb Cylinders 27
Figure 2.5.3c Typical Cylinder Spacing for 1000 lb Cylinders 28
Figure 2.5.4 Pressure Release Trip 29
Figure 2.5.5 Discharge Indicator 29
Figure 2.6.1.1 LAOH Nozzle 30
Figure 2.6.1.2 Tankside Nozzle 30
Figure 2.6.1.3 TF Nozzle 30
Figure 2.6.1.4 Three-Way Nozzle 31
Figure 2.6.1.5 Duct and Plenum Nozzle 31
Figure 2.6.1.6 Screening Nozzle 31
Figure 2.6.1.7 Total Flood, Perimeter Nozzle 31
Figure2.6.2JSH-360andJSH-180DischargeNozzleCongurations 32
Figure 3.2.1 Nozzle Placement for Overhead Local Application 39
Figure 3.2.2 Nozzle Placement for Tankside Local Application 40
Figure 3.2.3.1a 180° Sidewall Nozzle Maximum Coverage Area (Single Nozzle) 42
Figure 3.2.3.1b 360° Radial Nozzle Maximum Coverage Area 42
Figure3.2.4.1NozzlePlacementforFixedOriceTotalFloodApplication 43

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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
Figure 3.2.4.2a Nozzle Placement for Total Flood Perimeter 45
Figure 3.2.4.2b Total Flood Perimeter Nozzle Top View 45
Figure 3.2.4.2c Examples of Module Perimeter Total Flood Coverage Using the TFP Nozzle 46
Figure 3.2.5 Screening Nozzle Arrangement Examples 48
Figure 3.3.2.4 Nozzle Placement for Module Perimeter 54
Figure 3.3.2.5 Module Perimeter Nozzle Top View 54
Figure 3.3.4 Spacing For Two Nozzles,Round Duct 59
Figure 3.4.3a Open Front Paint Spray Booths (OFPSB) Nozzle Placement, Example 63
Figure 4.1.1a Mv Cylinder Bracket & Dimensions 71
Figure 4.1.1b Lv Cylinder Bracket & Dimensions 72
Figure 4.1.5 Discharge Pressure Switch Installation 76
Figure4.1.6.1aPilotActuationLineCongurationforMvSeriesCylinders 79
Figure4.1.6.1bPilotActuationLineCongurationforLvSeriesCylinders 79
Figure4.1.6.2AlternatePilotActuationLineConguration–UtilizingCopperTubing 80
Figure4.1.6.3AlternatePilotActuationLineConguration–UtilizingSchedule40Pipe 80
Figure 4.1.6.4a Remote Actuation Kit/Bracket Dimensions 81
Figure 4.1.6.4b Remote Actuation Cylinder w Supervisory Connectino Dimensions 82
Figure 4.1.6.4c Multiple Remote Actuation Diagram 83
Figure 5.6a Dry Chemical Warning Sign - Exit (P/N 97735) 89
Figure 5.6b Dry Chemical Warning Sign - Entrance (P/N 97733) 89
Figure 5.9 Cylinder Label 90
Figure C.1.1 Electric Valve Actuator 120
Figure C.1.2 Discharge Pressure Switch 121
Figure C.1.3 Explosion-Proof Pressure Switch 121
Figure C.2.1 Explosion-Proof Pressure Switch, Manual Reset 122
Figure C.2.2 Weather-Proof Discharge Pressure Switch 122
Figure 3.2.3.1c Back-to-Back Sidewall Nozzle Orientation - TypicalArrangements 127

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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
Table Index
Table 1.1 - System Temperature Limitations 2
Table 2.1.1 Cylinder Capacities 6
Table 2.3.8 Flex Hose Lengths 21
Table 2.6.2 - JSH Discharge Nozzle Sizes 32
Table2.6.3-JSHDischargeNozzleBlow-O󰀨Caps 33
Table 3.1.2a - General Purpose and Industrial Usage Nozzles 36
Table 3.1.2b - Vehicle Paint Spray Booth Usage Nozzles 37
Table 3.1.2c - Open Front Paint Spray Booth Usage Nozzles 37
Table 3.2 Industrial Usage Nozzle Application and Minimum Flow Rates 38
Table 3.2.4.1.1a TF Nozzle Coverages 44
Table 3.2.4.1.1b Maximum Standard Coverage Per Nozzle 44
Table 3.2.4.2.1 TFP Nozzle Coverages 45
Table 3.3 VPSB Nozzle Application and Minimum Flow Rates 50
Table 3.3.2.1a Standard Work Area, VPSB Nozzle Coverages 51
Table3.3.2.1bStandard Coverage,Vehicle PaintSprayBoothWorkAreaCoverage,RemainingSideLength, ft 52
Table3.3.2.1cStandard Coverage,Vehicle PaintSprayBoothWorkAreaCoverage,RemainingSideLength, mm 52
Table 3.3.2.3a Module Perimeter Vehicle Paint Spray Booth Work Area Coverage, ft 53
Table 3.3.2.3b Module Perimeter Vehicle Paint Spray Booth Work Area Coverage, mm 53
Table 3.3.3a Standard Plenum Coverage, VPSB 55
Table 3.3.3b Standard Plenum Coverage, VPSB, metric 56
Table 3.3.3c Expanded Plenum Coverage, VPSB 57
Table 3.3.3d Expanded Plenum Coverage, VPSB, metric 57
Table 3.3.3.1 VPSB Plenum Coverage - Minimum Flow Rates 58
Table 3.3.4 Rectangular Duct Dimensions 59
Table 3.4.2 OFPSB Nozzle Application and Minimum Flow Rates 61
Table 3.4.3.1a Work Area and Plenum Coverage, OFPSB 61
Table 3.4.3.1b Work Area and Plenum Coverage, OFPSB, metric 61
Table 3.4.3.2 Rectangular Duct Dimensions, OFPSB 62
Table 3.5 - Pipe Size vs. Flow Rate 64
Table 4.1.1a Mv Cylinder Dimensions 71
Table 4.1.1b Lv Cylinder Dimensions 72
Table 4.1.2 Acceptable Pipe Grades 73
Table 7.3.2 Clean Agent Valve Replacement Components 99
Table 7.4.2 Remote Nitrogen Cylinder Replacement Components 101
Table 6.2.1.1 - Approximate Container Pressure vs. Temperature 118
Table 3.2.3.1a - Alternate Nozzle Spacing for 180° Sidewall Nozzles - Selected Values 124
Table 3.2.3.1b - Alternate Nozzle Spacing for 360° Radial Nozzles - Selected Values 125
Table 3.2.3.1c - Nozzle Spacing for Back-to-Back 180° Sidewall Nozzles - Selected Values 126

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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
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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
Revision Description of Change Date
--- Initial Printing 26-Apr-2018
A UL Markings added. All references to "Large Dry Chemical" changed to "Engi-
neered Dry Chemical". All references to "Fire Suppression System" changed to
"Fire Extinguishing System". Part Number 26680 added. Sentence "The electric
valve actuator has a life span of 25 years from date of manufacture" added to
Section 2.2.3.1.
22-Mar-2019
B Figure 3.7.4a added. Table 3.7.4.1a and 3.7.4.1b screening nozzle part num-
ber corrected. Appendix D added. New Figure 4.1.6.4b added, existing Figure
4.1.6.4b renumbered accordingly. Appendix C renamed "Auxiliary/Legacy Com-
ponents".HazardclassinfoaddedtoPreface.Hazardtypesclariedwithbullet
points Section 1 and additional paragraphs added. Section 1.1 revised for clarity.
Section 2.6.1 thru 2.6.7 made subsection of new Section 2.6.1. Notes added to
Section 2.6.1.1 and 2.6.1.2. Phrase "the unclosable opening of Total Flooding
application where an enclosure has greater than the allowable total unclosable
opening percentage" added to Section 2.6.1.6. Section 2.6.2 and 2.6.3 added.
HazardtypesclariedwithbulletpointsSection3.ClassDdenitionaddedto
Section 3.1.1. Section 3.1.2 rewritten for clarity. Section 3.2 General Purpose
and Industrial Hazards added, all subsections and following sections renum-
bered accordingly. Section 3.2.3 Total Flood - JSH Nozzles added. Section 3.2.5
added. Cautions in Section 2.2.1 and 2.2.2 combined for clarity. Footnotes added
to Section 3.3 and 3.4. Individual Pipe Limitation sections removed and sec-
tions renumbered accordingly. Section 2.5.2 and 2.5.2.1 revised for new model
components, all relevant gures updated accordingly, and obsoleted compo-
nents moved to Appendix C. Phrase "to 10 lb*ft" in Section 4.1.4.1 and 4.1.4.2
changed to "until it mates with the valve face". Revise Section 7.3 and subsec-
tions for clarity. Revise Section 7.4.3. Revise Table 3.3, 3.3.3.1, and Table 3.4.2
for greater information. Sentence beginning "All dry chemical nozzles referenced
in this manual" added to Section 1 and Section 2.6. Footnote added to Section
1.1, Section 2.6.1.1, and Section 2.6.1.2. Section 2.6.1.6 reworded for clarity.
Sentence beginning "They allow for an unbalanced" removed from Section 2.6.2.
JSH-360/180 added to Table 3.2. Note beginning "Although NFPA 33" in Section
3.4 bolded, and same text added to Section 3.1.1. Metric value in Section 3.2.3.1
"twoverticaloricelayersnomorethan12in(15cm)belowtheceiling"corrected
to 304.8 mm.
22-Apr-2020
CLOAH corrected to LAOH. Cylinders actuated only pneumatically referred to
as 'secondary'. Phrase "but utilize DOT 4BW500 cylinders that are accepted in
Canada"addedtonoteinSection2.1.1."Teontapeshallnotbeused"addedto
Section 4.1.4.1 and Section 4.1.4.2. Section 4.1.5, Item 2, 1/2 inch corrected to
3/4 inch. Figure 5.9 updated.
22-Mar-2022
Revision History

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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

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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
Preface
This manual is intended for use with the Janus Fire Systems® Mv Series and Lv Series Engineered Dry Chemical
Fire Extinguishing Systems. Those who install, operate, design, or service these systems should read this entire
manual.
All design, implementation, and maintenance of the Janus Fire Systems® Engineered Dry Chemical Fire
Extinguishing Systems must be performed in compliance with the National Fire Protection Association (NFPA) 17 -
Standard for Dry Chemical Extinguishing Systems, NFPA 33 - Standard for Spray Application Using Flammable or
Combustible Materials, NFPA 70 - The National Electrical Code, NFPA 72 - The National Fire Alarm Code, and the
guidelines outlined in this manual.
AllsystemdesignsareperformedinconjunctionwiththeJanusDesignSuite®hydraulicowcalculationsoftware
and in compliance with the Janus Design Suite® Dry Chemical Flow Calculation Software Manual DOC327.
Janus Fire Systems® reserves the right to revise and improve its products as it deems necessary without prior
notication.ThismanualdescribesthestateofJanusFireSystems®productsatthetimeofitspublicationandmay
notreectthoseproductsatalltimesinthefuture.
All references to Codes or Standards in this manual refer to the latest edition of that Code or Standard unless
otherwise indicated.
Compressed gases shall be handled and used only by persons properly trained in accordance with Compressed
Gas Association, Inc. (CGA) pamphlets C-1, C-6, and P-1.
CGA pamphlets are published by the Compressed Gas Association Inc. (www.cganet.com).
The contents of this manual may not be reproduced in any form without the express written consent of Janus Fire
Systems®.
Copyright © 2018 Janus Fire Systems. All Rights Reserved.
Janus Fire Systems® and Janus Design Suite® are registered trademarks of Janus Fire Systems.
Janus Fire Systems
1102 Rupcich Drive
Millennium Park
Crown Point, IN 46307
TEL: [phone] FAX: [phone]
e-mail:info@janusresystems.com·www.janusresystems.com

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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
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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 1 General Information
1 GENERAL INFORMATION
e Janus Fire Systems® Mv and Lv Series Engineered Dry Chemical Fire Extinguishing Systems utilize
ABC (multi-purpose) dry chemical agent to provide fire protection for:
• General Purpose and Industrial Hazards which can incorporate total flooding protection, local
application protection,the use of specialized nozzle designs (as detailed in this manual) or a combination
of the above protection methods
• Vehicle Paint Spray Booth Hazards
• Open Front Paint Spray Booth Hazards
Systems utilizing ABC dry chemical agent may be used for surface fires classified as Class A (wood, paper,
cloth, rubber,and many plastics),Class B (flammable/combustible liquids and gases),and Class C (energized
electrical equipment).
NFPA 17 mandates that dry chemical extinguishing systems shall not be considered satisfactory protection
for the following:
• Chemicals containing their own oxygen supply, such as cellulose nitrate
• Combustible metals such as sodium, potassium, magnesium, titanium, and zirconium
• Deep-seated or burrowing fires in ordinary combustibles where the dry chemical cannot reach the point
of combustion
NOTE: Before dry chemical extinguishing is considered for use in protection of electronic equipment or
delicate electrical relays, the effect of residual deposits of dry chemical on the performance of electronic
equipment shall be evaluated. ABC dry chemical shall not be used on machinery such as carding equipment
in textile operations.
Janus Fire Systems has separated the protection design guidelines for Mv and Lv Series Engineered Dry
Chemical Fire Extinguishing Systems into the following separate sections:
• General Purpose and Industrial Hazards (Section 3.2)
• Vehicle Paint Spray Booths Hazards (Section 3.3)
• Open Front Paint Spray Booth Hazards (Section 3.4)
e Janus Fire Systems® Mv and Lv Series Engineered Dry Chemical Fire Extinguishing System and
individual components are common to all three of the above referenced hazard protection guidelines and
are detailed in Section 2 of this manual.
Piping arrangements for the Janus Fire Systems® Mv and Lv Series Engineered Dry Chemical Fire
Extinguishing System are not required to be balanced as is required by NFPA 17 for pre-engineered type
dry chemical systems. In addition, parameter limitations involving pipe lengths, the number of elbows, and
other factors such as the allowable distances (equivalent/feet) from cylinder/valve assembly do not apply.
All dry chemical nozzles referenced in this manual can be designed and installed in unbalanced piping
arrangements.

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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 1 General Information
e Janus Fire Systems® Mv and Lv Series Engineered Dry Chemical Fire Extinguishing System is supported
in conjunction with the Janus Design Suite® Flow Calculation Software.e Janus Design Suite® software
will provide a calculation report that will include details and information on the performance of the piping
network. If any limitations of the software or nozzles are exceeded, warning statements will appear on the
calculation report indicating what needs to be revised.
1.1 Listings and Approvals
When designed and installed according to the information contained in this manual,the Janus Fire Systems®
Mv and Lv Series Engineered Dry Chemical Fire Extinguishing Systems are Underwriters Laboratories
Inc. (UL) listed for the following hazard protection:
• General Purpose and Industrial Hazards
• Class A, B, and C total flooding protection
• Class B local application protection1
• Class A, B, and/or C special design nozzles as noted and detailed in this manual
• Any combination of above noted
• Open Face Spray Booths,
• Vehicle Paint Spray Booths
NOTE: It is important to note that Janus Fire Systems® nozzles have been UL tested for use in specific
applications such as screening nozzles for open face paint spray booths and may also be used in general total
flooding purposes in conjunction with the total flooding nozzles.
All dry chemical extinguishing systems certified by UL must meet the same test requirements for applicable
fire tests and component functional/material based tests under ANSI/CAN/UL/ULC 1254, regardless of
whether the design philosophy for the system uses the pre-engineered or engineered methodology.
System equipment has been verified through testing to function at ambient temperatures ranging from
-40°F (-40°C) to 130°F (54°C). Flow calculations have been verified at ambient temperatures of 70°F ±10°
(21.1°C ±5.5°). Storage outside of the range of 70°F ±10° (21.1°C ±5.5°) may result in inaccurate flow
calculations and may cause one or more nozzles to not discharge the calculated quantity of dry chemical.
Table 1.1 - System Temperature Limitations
Local Application, Overhead 32°F to 120°F (0°C to 49°C)
Tankside -20°F to 120°F (-29°C to 49°C)
Total Flood -40°F to 120°F (-40°C to 49°C)
Vehicle Paint Spray Booths -20°F to 120°F (-29°C to 49°C)
Open Paint Spray Booths -20°F to 120°F (-29°C to 49°C)
1ULonly lists dry chemical local applications for Class B hazards. UL1254 does not test local applications for ClassAor Class
C hazards.

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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
A cylinder containing pressurized dry chemical agent must be handled carefully. All anti-recoil safety plugs
and devices must be in place at all times when the cylinder is not connected to discharge piping.
The discharge of large amounts of dry chemical can create hazards to personnel such as reduced visibility and
temporarybreathingdi󰀩culties.
1.2 Extinguishing Agent
ABC (monoammonium phosphate-based) is suitable for use with all “A”, “B”, and “C” Class hazards. Dry
Chemical Type extinguishing systems are inappropriate for the protection of Class D hazards. As per
NFPA 17, dry chemical systems are not approved for deep-seated or burrowing fires (such as ordinary
combustibles, where the agent cannot reach the point of combustion), or on chemicals that contain their
own oxygen supply (such as cellulose nitrate). Do not mix different types of agents, or agents from different
manufacturers. Chemical reactions may occur when incompatible chemicals are mixed. Keep in mind that
the agent used for each system must be acceptable to the Authority Having Jurisdiction (AHJ).
Janus Fire Systems® Engineered Dry Chemical Fire Extinguishing Systems store ABC dry chemical agent
in steel cylinders. e dry chemical agent is then pressurized with nitrogen to 500 psig (34.48 bar) at 70°F
(21.1°C).
1.3 Safety Considerations
e Safety Data Sheet (SDS) on ABC Dry Chemical agent can be found in Appendix A of this manual
and should be read and understood before working with the agent. Training of personnel, fire drills, and
evacuation plans should be considered.
Section 1 General Information

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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
BLANK

Page: 5
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 2 System Components and Description
2 SYSTEM COMPONENTS AND DESCRIPTION
e Janus Fire Systems® Mv and Lv Series Engineered Dry Chemical Fire Extinguishing Systems can be
divided into the following component categories:
1. Agent Storage Components - Storage components consist of the cylinder assembly(s), which contains the
ABC dry chemical and the cylinder bracket(s), which holds the cylinder assembly securely in place.
2. Agent Distribution Components - Distribution components consist of the discharge nozzles used to
introduce the ABC dry chemical into a protected hazard along with the associated piping system used to
connect the nozzles to the cylinder assembly.
3. Trim Components - Trim components complete the installation of the suppression system and consist of
connection fittings, pressure gauge,low-pressure supervisory switch, electric valve actuator, and manual valve
actuator.
4. Multi-Cylinder Arrangement Components - Multi-cylinder arrangement components consist of the
pneumatic valve actuator(s), actuation check valve, vent check, actuation hose, and fittings required for a
multiple cylinder arrangement.
5. SupplementalComponents- Supplemental components include the discharge pressure switch and manifold
check valve.ey supplement the core equipment or complete a specific multi-cylinder configuration.
6. Control Panel - is device monitors the condition of the electric actuator, detectors, warning devices,
cylinder pressure, and any manual release and abort stations. All electric or electronic devices must connect to
the control panel in order to function.
7. Detection and Alarm Devices - Detection devices coupled with manual release stations maximize system
efficiency while audible and visual alarm devices alert staff of alarm conditions.
e following sections describe the operation and function of all controls and indicators that are used with
the Janus Fire Systems® Mv and Lv Series Systems.

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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 2 System Components and Description
2.1 Cylinder Assembly
e cylinder assembly consists of the cylinder, dip tube, and cylinder valve.
2.1.1 Cylinder
e dry chemical agent is stored as a powder inside a welded steel cylinder.e cylinders are then pressurized
with dry nitrogen to a pressure of 500 psig (34.48 bar) at 70°F (21°C). Each cylinder is filled to its intended
capacity. (See Table 2.1.1 for a list of available capacities).
Standard domestic cylinders are manufactured according to the requirements of the U.S. Department
of Transportation (USDOT) and Transport Canada¹(TC) for compressed gas and are fitted with an
identification label indicating the fill quantity of dry chemical agent.Each cylinder has internal neck threads
to allow for connection to the cylinder valve.
11000 lb Cylinders are not Transport Canada approved, but utilize DOT 4BW500 cylinders that are accepted in Canada.
Table 2.1.1 Cylinder Capacities
Valve
Series
Nominal
Cylinder
Size P/N Fill Options App. Empty
Weight
lb kg lb kg
Mv 200 lb 26301 50, 100, 150, 200 22.7, 45.4, 68.0, 90.7 213 96.6
Mv 600 lb 25147 200, 250, 300, 350,
400, 450, 500 90.7, 113.4, 136.1, 158.8, 181.4, 204.1, 226.8 346 157.0
Lv 1000 lb 25148
200, 250, 300, 350,
400, 450, 500, 550,
600, 650, 700, 750,
800, 850, 900
90.7, 113.4, 136.1, 158.8,
181.4, 204.1, 226.8, 249.4,
272.1, 294.8, 317.5, 340.1,
362.8, 385.5, 408.2
766 347.4
Ordering Instructions: Specify the CylinderAssembly P/N followed by a dash and the ll weight in pounds ex-
pressed in three digits.
2.1.1.1 Rupture Disc
A frangible rupture disc is fitted to the Lv Series cylinder body. It functions as an emergency relief device in
the event of excessive internal pressure within the cylinder. Its rupture point is between 850 psi (58.6 bar)
and 1000 psi (68.9 bar).
is feature is not found on the Mv Series cylinder. Instead, a rupture disc is located on the side of the Mv
Series cylinder valve as detailed in section 2.1.3.1.
2.1.1.2 Pressure Vent Port
e pressure vent port is located on the cylinder body. It is used in conjunction with a cylinder venting kit
(P/N 97641) to release nitrogen from a filled cylinder in the event the agent fill port must be opened.
2.1.1.3 Agent Fill Port
e agent fill port is located at the top of the cylinder. It is used to fill the cylinder with ABC dry chemical
agent.