UNITED Nitrogen Pac SC-W, Installation, Commissioning Maintenance

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UNITED FIRE SYSTEMS - NITROGEN-
PAC™
MODEL SC-W
INSTALLATION, COMMISSIONING, AND MAINTENANCE MANUAL
REVISION 1.01 MAR 2021 - P/N 30-NPWICM-000
i
INDEX
Section Description Page
INDEX
List Of Figures iv
List Of Tables v
List Of Abbreviations vi
Safety Information vii
Foreword ix
1. GENERAL INFORMATION 1
1.1 Glossary 1
1.2 System Purpose 2
1.3 Functional Description 3
1.4 Model SC-W Assembly
– Internal Arrangement
5
1.5 Model SC-W Assembly
– External Arrangement
7
1.5.1 Connections 7
1.5.2 Indicators 7
1.5.3 Controls 7
1.5.4 Other 7
1.6 Nitrogen Receiver
– Model NR-5
9
1.7 Nitrogen Receiver
– Model NR-10
10
1.8 Nitrogen / Air Maintenance Device
– Model NAMD-1
11
1.9 Purge Vent Assemblies 12
1.9.1 Purge Vent Assembly
– Model PVA-4 (For Manual Purging)
12
1.9.2 Purge Vent Assembly
– Model PVA-2 (For TRUE ADVANCED PURGE (TAP) Device)
13
1.10 N
2
Purity Analyzer
– Hand-Held – Model NA-2
14
1.11 (Optional) TRUE ADVANCED PURGE (TAP) Device
– Model TAP-G3
15
1.12 (Optional) Corrosion Monitor Assembly
– Model CMA-1
16
2. EQUIPMENT SELECTION 17
2.1 Introduction 17
2.2 Basis for Equipment Selection 17
2.3 Steps to Follow 17
2.4 Information To Be Obtained During Survey 17
2.5 System Arrangements 19
2.5.1 Type
I
Arrangement 19
2.5.2
Type
II
Arrangement
20
2.6
Ensuring the NITROGEN-
PAC™
Model SC-W is Appropriate for the Sprinkler System in Use
21
2.6.1 Maximum Number Of Risers 21
2.6.2 Determining Volume (In Gallons) Of Each Sprinkler Riser 21
2.6.3 Maximum Volume Of Single Largest Riser 22
2.6.4 Maximum Volume Of All Risers 22
2.6.5 Required Supervisory Pressure 22
2.6.6
Type
I
Arrangements
– Model SC-W Assembly for Initial-Fill with Air
22
2.6.7 Type II Arrangements
– External Air Compressor for Initial-Fill with Air
22
2.6.8 Are Sprinkler Systems NEW or EXISTING? 22
2.6.9 Are Sprinkler Systems Equipped with Quick-Opening Devices (Dry Accelerators)? 23
2.6.10 Nitrogen Receiver 23
2.6.11 Nitrogen / Air Maintenance Device
– Model NAMD-1
23