Amerex HELIX User manual

P/N 26291 REV A (February 2018)
Customer Service:
Phone: [phone]
[e-mail]
Technical Service:
Phone: [phone]
[e-mail]
AMEREX CORPORATION
P.O. Box 81
7595 Gadsden Highway
Trussville, AL 35173
www.amerex-fire.com
POLLUTION CONTROL UNIT (PCU) FIRE SUPPRESSION SYSTEM
DESIGN, INSTALLATION, MAINTENANCE & RECHARGE MANUAL

Revision Record
Revision Revision
Date
Page/
Section
Description
Feb, 2018
2.3.5/2.14.4 Added Compression Seal (P/N 26427)
A
2.4.1 Modified 14032-R to accept Electrical Junction Box
2.10.4 Added Outdoor Pressure Switch Extension Cable (P/N 21539-XX)
3.6.1
Added Note for outdoor installations. Revised Figure 3.6.1c to show (2)
Communication Cables (for dual direction communication). Added Figure 3.6.1e
and associated wording.
3.6.2 Added Outdoor Installation View & wording
3.6.3 Added Figures 3.6.3c/3.6.3d and associated bold wording
3.6.4 Added “Note” to wording
3.6.5 Added Figures 3.6.3c/3.6.3d and associated bold wording
4.3.1 Revised Step 6 and added Figure 4.3.1b
4.5 Revised step 2 (Linear Actuator Install). Revised Figure 4.5b
4.7.3 Revised Figure 4.7.3a to show indoor/outdoor installations
4.7.5 Added P/N 26427. Added views 4.7.5d/e/f for outdoor installations
4.8.1 Revised View 4.8.1a/4.8.1b to show option of junction/conduit box
4.8.2 Revised Step 1. Revised Figure 4.8.2 to show junction box option
4.8.4 Revised wording and revised Figure 4.8.4a /4.8.4b to show junction box option
4.8.5 Revised Figure 4.8.5a to include “*” Note
4.9 Revised Tables 4.9a/b to include “**” and “***” notes
All Replaced “Strike” with “STRIKE™“ & “HELIX” with “HELIX™”
All Added alternate units to dimensions [mm]
TOC Added page numbers to table of contents page
4.9 Added page 76, (Ref section 4.9)

1
HELIX™ Manual (P/N 26291) Table of Contents
Rev A (February 2018) HELIX™ PCU Fire Suppression System
Table of Contents:
Chapter 1: General Information...............................................................................................5
1.1 Introduction ................................................................................................................6
1.2 What Can Be Protected ..............................................................................................6
1.3 Testing Performed ......................................................................................................6
Chapter 2: Component Description ........................................................................................7
2.1 Agent Cylinders ..........................................................................................................8
2.2 Agent Cylinder Mounting Bracket................................................................................9
2.3 Agent Distribution Network Accessories .....................................................................9
2.3.1 Discharge Fitting Kit ..........................................................................................9
2.3.2 Agent Distribution Network Plumbing ................................................................9
2.3.3 Distributor Block 3/4” x 1/2” ...............................................................................10
2.3.4 Discharge Nozzle ..............................................................................................10
2.3.5 Quik Seal Adaptors ...........................................................................................11
2.4 System Actuation Control Heads ................................................................................12
2.4.1 Electric Control Head ........................................................................................12
2.4.2 Pneumatic Control Head ...................................................................................12
2.5 System Actuation Accessories....................................................................................12
2.5.1 Vent Check........................................................................................................12
2.5.2 Electric Nitrogen Actuator ..................................................................................13
2.5.3 Nitrogen Cylinder...............................................................................................13
2.5.4 Actuator Brackets ..............................................................................................13
2.5.5 Linear Actuator ..................................................................................................14
2.5.6 50 psi Pressure Switch ......................................................................................14
2.5.7 Agent Cylinder Pressure Switch ........................................................................14
2.6 Dry Chemical Suppression System Parts List ...........................................................15
2.7 STRIKE Electronic Control System (ECS)..................................................................16
2.7.1 STRIKE Control Unit & Enclosure .....................................................................17
2.7.2 STRIKE Control Unit Indicators & Features .......................................................18
2.8 Manual Pull Stations ..................................................................................................19
2.9 Linear Heat Detector..................................................................................................20
2.10 Field Wiring Cables...................................................................................................20
2.10.1 Detection Cables............................................................................................20
2.10.2 Actuation Cable..............................................................................................21
2.10.3 Manual Pull Station Cables ............................................................................21
2.10.4 Pressure Switch Cable...................................................................................21
2.10.5 Communication Cable....................................................................................22
2.10.6 PC Interface Cable.........................................................................................22
2.11 End of Line Module ....................................................................................................22
2.12 Replacement Battery..................................................................................................22
2.13 Auxiliary Devices........................................................................................................23

2
HELIX™ Manual (P/N 26291) Table of Contents
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.13.1 Relay Control Module .................................................................................... 23
2.13.2 Horn and Strobe Assembly ............................................................................ 24
2.14 Detection (LHD) installation Accessories .................................................................. 24
2.14.1 LHD Support Clips ......................................................................................... 24
2.14.2 Hood Fasteners ............................................................................................. 25
2.14.3 Hood Fasteners Rivet Style .......................................................................... 25
2.14.4 LHD Bulkhead Quik Seal ............................................................................... 25
2.15 Function Testing Devices ......................................................................................... 26
2.15.1 LHD Test Leads.............................................................................................26
2.15.2 Alarm Module ................................................................................................26
2.16 STRIKE ECS Parts List.............................................................................................27
Chapter 3: System Design....................................................................................................... 29
3.1 Steps to System Design ............................................................................................. 29
3.2 Nozzles ......................................................................................................................29
3.3 Agent Cylinder Sizing ................................................................................................. 30
3.4 Agent Distribution Network Design ............................................................................. 31
3.4.1 HX25 Agent Distribution Network (2 Nozzle) ..................................................... 32
3.4.2 HX50 Agent Distribution Network with Tees (4 Nozzle).....................................33
3.4.3 HX50 Agent Distribution Network with Distributor Block (4 Nozzle) ................... 34
3.5 System Actuation Design ........................................................................................... 35
3.5.1 Single or Dual Agent Cylinder Networks with Electric Control Heads ................ 35
3.5.2 Multiple Agent Cylinder Networks Pneumatic Control Heads ............................36
3.6 STRIKE ECS System Design..................................................................................... 38
3.6.1 Introduction STRIKE ECS ................................................................................38
3.6.2 Detection Circuit Design .................................................................................. 42
3.6.3 Actuation Circuit Design................................................................................... 44
3.6.4 Manual Pull Circuit Design............................................................................... 45
3.6.5 Pressure Switch Circuit Design........................................................................46
3.6.6 Relay Module & Auxiliary Circuit Design .......................................................... 47
Chapter 4: System Installation ................................................................................................48
4.1 Agent Cylinder & Agent Cylinder Bracket Selection ................................................... 49
4.2 Agent Distribution Network Installation .......................................................................49
4.2.1 Discharge Fitting Kit.........................................................................................49
4.2.2 Distributor Block...............................................................................................49
4.2.3 Nozzle Placement & Mounting ........................................................................49
4.3 System Actuation Control Head Installation ...............................................................50
4.3.1 Electric Control Head .......................................................................................50
4.3.2 Pneumatic Control Head ................................................................................. 51
4.4 50 psi Pressure Switch Installation ............................................................................ 52
4.5 Electric Nitrogen Actuator Installation, Indoor & Outdoor ...........................................52

3
HELIX™ Manual (P/N 26291) Table of Contents
Rev A (February 2018) HELIX™ PCU Fire Suppression System
4.6 Pneumatic Actuation Network Installation..................................................................53
4.7 STRIKE ECS Installation ........................................................................................... 54
4.7.1 Steps to System Installation............................................................................. 54
4.7.2 STRIKE Control Unit Installation ...................................................................... 54
4.7.3 Linear Heat Detector (LHD) Installation ........................................................... 56
4.7.4 LHD Support Clip & Support Tubing ................................................................58
4.7.5 LHD Quik Seal or Compression Seal Installation .............................................58
4.7.6 LHD Connector Installation ..............................................................................60
4.7.7 Linear Actuator Installation .............................................................................. 60
4.7.8 Manual Pull Station Installation ........................................................................60
4.7.9 Relay Module & Optional Device Installation.................................................... 63
4.8 Field Wiring ................................................................................................................ 64
4.8.1 Detection Circuits............................................................................................. 65
4.8.2 Actuation Circuits............................................................................................. 67
4.8.3 Manual Pull Circuit........................................................................................... 68
4.8.4 Pressure Switch Circuit.................................................................................... 70
4.8.5 Relay Module & Optional Device Circuits......................................................... 72
4.9 STRIKE Control Unit Wiring & Termination ...............................................................74
4.10 STRIKE Control Unit Programming .......................................................................... 77
4.10.1 Temporary Power Supply Connection ...........................................................77
4.10.2 PC Software Installation & Interface Connection........................................... 78
4.10.3 Programming a System Configuration .......................................................... 79
4.10.4 Monitor Mode................................................................................................83
4.11 Function Testing & Initial Commissioning ................................................................. 84
4.11.1 STRIKE Control Unit Display Testing ............................................................. 84
4.11.2 Detection Sensor Testing............................................................................... 85
4.11.3 Manual Pull Station Testing ........................................................................... 86
4.11.4 Fault Testing.................................................................................................. 86
4.12 Placing the System into Service .............................................................................. 87
4.12.1 Placing the Suppression System in Service.................................................87
4.12.2 Placing the STRIKE ECS System into Service ............................................ 87
4.13 Provide Owner / Operator Training .......................................................................... 89
Chapter 5: Inspection & Maintenance .................................................................................... 90
5.1 Daily Inspection ......................................................................................................... 90
5.2 Monthly Inspection .................................................................................................... 90
5.3 Semi-Annual Maintenance......................................................................................... 90
5.4 (6) Six Year Maintenance .........................................................................................91
5.5 (12) Twelve Year Maintenance..................................................................................92
5.6 Battery Replacement Procedure............................................................................... 92
Chapter 6: Recharge................................................................................................................ 94
6.1 Service / Recharge Tools .......................................................................................... 94

4
HELIX™ Manual (P/N 26291) Table of Contents
Rev A (February 2018) HELIX™ PCU Fire Suppression System
6.1.1 Recharge Adapter............................................................................................ 94
6.1.2 Hydrotest Adapter ........................................................................................... 94
6.1.3 Distribution Hose Blowout Adapter................................................................... 94
6.1.4 Tee Handle ...................................................................................................... 95
6.1.5 2 ½” Tight Access Open End Pump Wrench.................................................... 95
6.1.6 Pneumatic Actuation Network Test Adapter ..................................................... 95
6.2 Recharge Instructions ...............................................................................................96
6.2.1 Agent Cylinder Control Head Removal & Cleaning .......................................... 96
6.2.2 Purging the Agent Distribution Network ........................................................... 99
6.2.3 Agent Cylinder Removal .................................................................................. 99
6.2.4 Agent Cylinder Valve Removal & Cleaning ...................................................... 99
6.2.5 Agent Cylinder Refill ........................................................................................ 101
6.2.6 Agent Cylinder Valve Installation & Agent Cylinder Charging........................... 101
6.2.7 Actuator Removal & Cleaning .......................................................................... 102
6.2.8 Pneumatic Actuation Network Testing.............................................................. 103
6.2.9 Nitrogen Cylinder Recharge............................................................................. 104
Chapter 7: System Alarms & Troubleshooting ..................................................................... 107
7.1 System Alarm Condition ............................................................................................. 107
7.2 Service System (Fault) Condition ............................................................................... 108
7.3 Battery Fault Condition .............................................................................................. 109
7.4 Actions to Take if a Fire Condition is Witnessed......................................................... 109
7.5 Event Log................................................................................................................... 109

5
HELIX™ Manual (P/N 26291) Chapter 1: General Information
Rev A (February 2018) HELIX™ PCU Fire Suppression System
Chapter 1: General Information
This document must be used in conjunction with the following standards:
1. All applicable NFPA standards.
2. All other standards or laws deemed applicable to an installation by local authorities having
jurisdiction (AHJ).
IT IS THE RESPONSIBILITY OF INDIVIDUALS WHO INSTALL, OPERATE, INSPECT,
RECHARGE AND/OR MAINTAIN THESE SYSTEMS TO READ THIS ENTIRE MANUAL.
Updated Installation, Operation, and Maintenance Manuals and Technical Bulletins will be
available online at www.amerex-fire.biz. It is important that these updates and additions be added
to this manual according to the instructions that will accompany them.
The applications and use of the Amerex® HELIX™ Dry Chemical PCU Fire Suppression Systems
are limited to the applications and uses described in this manual. Technical data contained herein
is based on controlled laboratory testing deemed appropriate and is intended for informational
purposes only. The data presented is accurate for the testing performed, but is published with no
guarantee relative to a given hazard where factors are different from those encountered during
actual tests. Amerex disclaims any liability for any use of the data and information contained herein
by any and all other parties. Please direct questions concerning information in this manual to:
AMEREX CORPORATION
P.O. Box 81
Trussville, AL 35173-0081
Phone: [phone]
Fax: [phone]
For Terms and Conditions of Amerex products, please visit the following link:
http://amerex-fire.com/terms-and-conditions/
Customer Service: Technical Services:
[e-mail] [e-mail]

6
HELIX™ Manual (P/N 26291) Chapter 1: General Information
Rev A (February 2018) HELIX™ PCU Fire Suppression System
1.1 Introduction
Amerex HELIX Dry Chemical Fire Suppression Systems are pre-engineered systems designed
specifically for protection of Pollution Control Units (PCU) and equipment. Each system uses stored
pressure Agent Cylinders with predetermined nozzle flow rates, quantities and discharge volumes.
The Dry Chemical Agent is discharged into hazard areas via an Agent Distribution Network
consisting of flexible hydraulic hose. The available Agent Cylinders with the number of supported
nozzles are listed in Table 3.3.
1.2 What Can Be Protected
A complete PCU analysis must be performed for each piece of equipment being protected to
determine the components that would require fire suppression by the Amerex HELIX Fire
Suppression System. Protection may include but is not limited to:
• Pollution Control Units (PCU)
1.3 Testing Performed
• Internal fire testing performed to determine coverage capability
• UL1254 performance testing

7
HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
Chapter 2: Component Description
The following sections describe the various components available for use with the Amerex HELIX
PCU Dry Chemical Fire Suppression System. These include Electronic Control Systems, Agent
Cylinders of various sizes and capacity, and the Cylinder Brackets used for mounting each Agent
Cylinder. Also included are the components that comprise the Agent Distribution Network, the
Nozzles used for dispersing the Dry Chemical Agent, and various control heads and accessories
used to actuate and discharge the Agent Cylinders.
MANUAL PULL
STATIONS
RELAY MODULE
STRIKE ECS DETECTION &
ACTUATION
DISCHARGE NETWORK
DETECTION
ZONE
AIR FLOW
HELIX PCU DRY CHEMICAL
FIRE SUPPRESSION SYSTEM
AGENT CYLINDERS
POLLUTION CONTROL UNIT
(PCU)
LINEAR HEAT
DETECTOR (LHD)
Figure 2

8
HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
WARNING: SHIPPING PLATES (FIGURE 2.1a) WILL BE REMOVED AT INSTALLATION AND
RETAINED FOR LATER USE. DO NOT REMOVE UNTIL DIRECTED TO DO SO.
Agent Cylinders are constructed to meet DOT 4BW, requirements with test pressure of 700 psi
(4826 kPa), and require a hydrostatic test every twelve (12) years or more frequent intervals if
warranted. The operating temperature range of the Agent Cylinders is -65°F to 150°F (-54°C to
66°C).
Agent
Cylinder
Part
Number
Overall Height
(A)
in (mm)
Height to Discharge
Opening (B)
in (mm)
Diameter (C)
in (mm)
Agent
Capacity
lb (kg)
HX25ABC PRS SW 26318 17.6 (447) 16.0 (406) 9.0 (229) 25 (11.3)
HX50ABC PRS SW 26320 31.3 (795) 30.0 (762) 9.0 (229) 50 (22.7)
Table 2.1 Figure 2.1b
ANTI-RECOIL
PLATE (P/N 10646)
SHIPPING PLATE (P/N 10099)
PRESSURE GAUGE
AGENT CYLINDER VALVE
RUPTURE DISC
(UNDER CAP)
DUST CAP
(P/N 25685)
AGENT CYLINDER
PRESSURE SWITCH
2.1 Agent Cylinders
The Amerex HELIX Fire Suppression System Agent Cylinders are available in two sizes, with
different mounting options and orientations. The Agent Cylinders are shipped fully charged from the
factory. Each Agent Cylinder includes a brass Agent Cylinder Valve with a Pressure Gauge and a
safety Rupture Disc with an installed Dust Cap installed. Agent Cylinders are pressurized with
nitrogen gas to a pressure of 350 psi (2413 kPa) at 70°F (21°C). HX25 and HX50 Agent Cylinders
are equipped with an Anti-Recoil Plate (P/N 10646) installed on the Agent Cylinder Valve discharge
outlet to prevent accidental discharge and to minimize recoil in the unlikely event of an accidental
discharge during shipment. (See Figure 2.1a). These safety components are removed only when the
Agent Cylinder is installed in the Cylinder Bracket and connected to Agent Distribution Network.
DISCHARGE
OPENING
Figure 2.1a
DISCHARGE OPENING
HX25ABC
HX50ABC

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.3 Agent Distribution Network Accessories
2.3.1 Discharge Fitting Kit (P/N 10199-R)
The Discharge Fitting Kit is used to connect the Agent Cylinder
Valve to the Agent Distribution Network. It consists of a brass
fitting with an o-ring seal on one end, 3/4” NPT male pipe threads
on the other, and a stainless steel flange for locking the fitting in
place. The flange is placed over the threaded end of the fitting
before connection to the Agent Distribution Network. See Section
4.2.1 for installation instructions.
2.3.2 Agent Distribution Network Plumbing
The Agent Distribution Network carries the Dry Chemical Agent from the Discharge Fitting Kit to the
Nozzles. The network consists of 1/2” (12.7 mm) and 3/4” (19.1 mm) wire braided rubber hydraulic
hose and the corresponding fittings. Distribution hose and fittings are installer supplied. Detailed
specifications for these hoses by manufacturer are given in Section 3.4. Care must be taken to only
use the brand of fittings specified by each hose manufacturer for their hose. Substitution of
unapproved hose or that of a different size will void AMEREX warranty and will adversely affect
system performance. See Section 3.4 for installation instructions.
Figure 2.3.1
2.2 Agent Cylinder Mounting Bracket
A single Cylinder Bracket is available for either size Agent Cylinder as shown in Table 2.2. Overall
dimensions and mounting locations are shown below. Each Cylinder Bracket includes two band
clamps for securing the Agent Cylinder to the bracket. Refer to Section 4.1 for Cylinder Bracket
mounting options. Dimensions are in inches [mm].
Agent Cylinder Cylinder Bracket Part Number
HX25/HX50 HX 25/50 Cylinder Bracket 14929
Table 2.2
Figure 2.2

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
3/4 [19.0] NPT INLET
(4) 1/2 [12.7] NPT
OUTLETS TO NOZZLES
Figure 2.3.3a Figure 2.3.3b
2.3.3 Distributor Block 3/4” X 1/2” (P/N 10178-R)
The Distributor Block 3/4” X 1/2” is used in the Agent Distribution Network to distribute the flow of
Dry Chemical Agent to multiple nozzles. It has one inlet with 3/4” NPT threaded port, and four
outlets with 1/2” NPT threaded ports. The Distributor Block is painted black to inhibit corrosion. See
Section 3.4 for the proper Agent Distribution Network to be used with this Distributor Block.
Dimensions are in inches [mm].
2.3.4 Discharge Nozzle (P/N 26330)
The Discharge Nozzle is used for dispersing Dry
Chemical Agent in a flat screen pattern into the
hazard area. It is constructed of brass and is
machined with a 1/2” NPT male thread. It is shipped
with a heat and weather resistant rubber Protective
Nozzle Blow-Off Cap (P/N 10167) that prevents
debris from lodging in the Nozzle outlet. The blow off
cap is molded with a retaining loop that assembles
over the 1/2” NPT threads before the Nozzle is
installed (See Figure 2.3.4). Replacement Nozzle
Blow Off Caps are available (P/N 10167). See
Section 3.2 and 4.2.3 for installation instructions. Figure 2.3.4
PROTECTIVE NOZZLE
BLOW OFF CAP (P/N 10167)
DISCHARGE NOZZLE
(P/N 26330)

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.3.5 Quik Seal Adapters (P/N 12510, 12512, 14204, 18252, 24737, 26427, 22280) [ITEM 16]
Quik Seal Adapters and Compression Seal Adapters are UL Listed mechanical fittings that produce
a grease tight seal around an agent distribution network, Linear Heat Detector (LHD) or electrical
conduit where those items penetrate a hood, duct or bulkhead. These Adapters are available in a
variety of configurations for different applications.
P/N Description Hole Size Figure
12510
Compression Seal Adapter for
5/8” Tubing &
3/8” Threaded Pipe
1-1/8” [28.57]
12512 Compression Seal Adapter for
1/2” EMT Conduit 1-1/8” [28.57]
14204 “Quik Seal” Threaded Adapter
for 1/2” NPT Threaded Pipe 1-1/8” [28.57]
18252 “Quik Seal” Threaded Adapter
for 1” NPT Threaded Pipe 1-5/8” [41.27]
24737
Compression Seal Adapter for
STRIKE LHD ONLY for use in
indoor applications
3/4” [19.05]
26427
Compression Seal Adapter for
STRIKE LHD ONLY for use with
outdoor conduit connections
(Used in addition to P/N 14204 Quik
Seal)
—
22280 “Quik Patch” Plug and Seal for
1-1/8” to 1-3/8” holes
1-1/8” [28.57]
to
1-3/8” [34.92]
Figure 2.3.5a
NPT
THREAD (BOTH SIDES)
Figure 2.3.5b
Figure 2.3.5c
Figure 2.3.5d
Figure 2.3.5e
1/2 NPT
(P/N 14204)

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.4 System Actuation Control Heads
The following control heads can be used for actuation of the
Agent Cylinder Valve, releasing the Dry Chemical Agent
from the Agent Cylinder.
2.4.1 Electric Control Head (P/N 14032-R)
The Electric Control Head is used in all electrically only
actuated Amerex Dry Chemical System installations. This
device is constructed of machined brass and bolts directly
to the top of the Agent Cylinder Valve. The body of the
Electric Control Head is threaded to accept the Linear
Actuator (P/N 20500-R) and threaded for electrical conduit
box mounting (3/4” NPT). The base retains the actuator
piston and locking ring. The Linear Actuator, when
activated, will force the piston inside the Electric Control
Head down to depress the Agent Cylinder Valve stem,
releasing the Dry Chemical Agent. See Section 4.3.1 for
installation instructions.
2.4.2 Pneumatic Control Head (P/N 10147-R)
The Pneumatic Control Head is used in all pneumatic only
actuated Dry Chemical System installations using a remote
Electric Nitrogen Actuator through the Pneumatic Actuation
Network. This device is constructed of extruded brass and
bolts directly to the top of the Agent Cylinder Valve. When
supplied with nitrogen actuation pressure from the
Pneumatic Actuation Network through 1/4” NPT female
ports on either side, the piston inside the Pneumatic Control
Head extends and depresses the Agent Cylinder Valve
stem, releasing the Dry Chemical Agent. See Section 4.3.2
for installation instructions.
2.5 System Actuation Accessories
2.5.1 Vent Check (P/N 10173-R)
The Vent Check is a safety device that installs into the last
Pneumatic Control Head in a Pneumatic Actuation Network. Its
function is to relieve any slowly accumulating pressure that could
cause the control head to open the Agent Cylinder Valve
prematurely. A Vent Check must be used on all systems that utilize
nitrogen pressure for activation of the Amerex HELIX Fire
Suppression System. The body of the Vent Check is constructed of
machined brass. The inside of the Vent Check contains a spring
and nylon ball. The Vent Check is supplied with a plastic Dust Cap
(P/N 13761), which must be installed on the Vent Check after
installation into the Pneumatic Control Head. See Section 4.3.2 for
installation instructions.
Figure 2.4.1
ELECTRIC CONTROL
HEAD (P/N 14032-R)
LINEAR ACTUATOR
(P/N 20500-R)
Figure 2.4.2
PNEUMATIC
ACTUATION
NETWORK
PNEUMATIC CONTROL
HEAD (P/N 10147-R)
Figure 2.5.1
(3/4” NPT)

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.5.2 Electric Nitrogen Actuator (P/N 20775-R)
The Electric Nitrogen Actuator is used to release nitrogen gas pressure from a
Nitrogen Cylinder to pneumatically activate a control head through a Pneumatic
Actuation Network. The body of the Electric Nitrogen Actuator is constructed of
chrome plated brass and contains a stainless steel puncture point and a 1/4”
NPT female port to connect to the Pneumatic Actuation Network. A brass
adapter is threaded into the top that accepts a Linear Actuator (P/N 20500-R).
The Electric Nitrogen Actuator is supplied with two 1/4”-20 stainless steel cap
screws for securing the assembly to an Actuator Bracket. See Section 4.5 for
installation instructions.
2.5.3 Nitrogen Cylinder (P/N 09956-R)
The Nitrogen Cylinder supplies nitrogen gas pressure to a control head through
the Pneumatic Actuation Network to open the Agent Cylinder Valve. The
Nitrogen Cylinder is charged to 1800 psi (12410 kPa) at 70°F (21°C). A pressure
gauge is used to identify proper charge pressure of the Nitrogen Cylinder and is
located on the bottom of the Nitrogen Cylinder. The pressure gauge is protected
by an impact resistant plastic gauge guard. The Nitrogen Cylinder is shipped
fully charged from the AMEREX factory with a protective shipping cap installed
on the outlet threads. The cap must be removed at installation but must remain
in place at all other times. Retain the shipping cap to reuse when recharging a
Nitrogen Cylinder. Construction of the Nitrogen Cylinder is per DOT 3E. The
cylinder is rechargeable by certified AMEREX installers and does not require
periodic hydro testing. See Section 4.5 for installation instructions.
2.5.4 Actuator Bracket (P/N 10355-R)
The Electric Nitrogen Actuator and Nitrogen Cylinder can be
mounted to a surface with use of an Indoor Actuator Bracket (P/N
10355-R). The bracket is constructed of steel and painted to
inhibit corrosion. See Section 4.5 for installation instructions.
INDOOR ACTUATOR
BRACKET (P/N 10355-R)
Figure 2.5.4
Figure 2.5.2
Figure 2.5.3
SHIPPING CAP

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.5.5 Linear Actuator (P/N 20500-R)
The Linear Actuator is a device when electrically activated extends a metal
shaft which mechanically opens the Agent Cylinder Valve when used in an
Electric Control Head or opens a Nitrogen Cylinder when used in an Electric
Nitrogen Actuator. Once activated it cannot be reused and must be
replaced. Service life of the Linear Actuator is 6 years after which it must be
replaced. Shelf life of the Linear Actuator is 10 years after which it must be
replaced whether it has been placed in service or not. Each Linear Actuator
is supplied with a Mylar style label for identifying date of manufacture. An O-
ring (P/N 17137) is provided with each Linear Actuator and must be used
each time that a Linear Actuator is installed. See Sections 4.3.1 and 4.5 for
installation instructions. Use only 20500-R Linear Actuator for actuating a
HELIX Fire Suppression System.
O-RING
(P/N 17137)
Figure 2.5.5
2.5.6 50 psi Pressure Switch (P/N 22573-R or 23850-R)
The 50 psi Pressure Switch is an optional switch designed to be used in the
Pneumatic Actuation Network. The Switch (P/N 22573-R non-terminated version;
P/N 23850-R terminated version) is normally in the open position and closes when
subjected to nitrogen pressure in excess of 50 psi. The Switch is threaded with a
1/4” NPT male port. The Switch must be installed in a tee in the Pneumatic
Actuation Network just before the first Pneumatic Control Head (P/N 10147-R). The
Switch can be utilized to send a signal such as “system discharge” back to the
associated electronics control unit; or to an external relay for sounding an auxiliary
alarm or illuminating a light in the event of system discharge. Terminated Switches
may be used in the detection circuit of the STRIKE ECS. See Section 4.4 for
installation instructions.
Figure 2.5.7
2.5.7 Agent Cylinder Pressure Switch (Reference Only)
The Agent Cylinder Pressure Switch is supplied with and connected directly to the Agent Cylinder.
This switch is designed to monitor Agent Cylinder pressure. The switch is closed in a pressurized
Agent Cylinder and opens when Agent Cylinder pressure drops below 270 psi, indicating a
discharged or leaking Agent Cylinder.
Figure 2.5.6

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.6 HELIX System Parts List
Parts List
Item Part Number Description
1 26318 Agent Cylinder, HX25ABC PRS SW
26320 Agent Cylinder, HX50ABC PRS SW
2 14929 Cylinder Bracket, V25
Cylinder Bracket, V50
310199-RDischarge Fitting Kit
4—- Network Plumbing
5 10178-RDistributor Block, 3/4” X 1/2” (4)
626330 Nozzle
7
12510 Compression Seal Adapter, 5/8” Tubing & 3/8” Pipe
12512 Compression Seal Adapter, 1/2” EMT Conduit
14204 “Quik Seal” Adapter, 1/2” Pipe
18252 “Quik Seal” Adapter, 1” Pipe
24737 Compression Seal Adapter, LHD
26427 Compression Seal Adapter, LHD (for electrical conduit)
22280 “Quik Patch” Plug and Seal
8 14032-RControl Head, Electric
10147-RControl Head, Pneumatic
910173-RVent Check
10 20775-RActuator, Electric
11 09956-RNitrogen Cylinder
12 10355-RActuator Bracket, Indoor
13 20500-RLinear Actuator
14 22573-RPressure Switch, 50 psi, Non-terminated
23850-RPressure Switch, 50 psi, Terminated
Service Tools (See Chapter 6)
Item Part Number Description Qty. for Service
1 10136 Recharge Adapter 1
2 05152 Hydrotest Adapter 1
3 12129 Blowout Adapter, Distribution Hose 1
410134 Tee Handle 1
5- Wrench, 2-1/2” Tight Access Installer Supplied
610895 Adapter, Pneumatic Actuation Network Test 1
710270 Nitrogen Fill Adapter 1
Recharge/Rebuild Parts (See Chapter 6)
Item Part Number Description
110095 Recharge Valve Stem
203736 Agent Recharge Pail, ABC Dry Chemical (50 LB)
310939 Actuator Rebuild Kit
409958 Rupture Disc, Nitrogen Cylinder

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.7 STRIKE™ Electronic Control System (ECS)
This page describes the various components available for use with the Amerex STRIKE Electronic
Control System (ECS). These include the central STRIKE Control Unit, Linear Heat Detector (LHD),
cables and other components that comprise a complete electrical system. A simple STRIKE ECS
diagram is given below, which shows available circuits and components (See Figure 2.7). All
available system components, including additional components not shown in this diagram are
detailed in the following sections.
Figure 2.7
STRIKE ECS
CONTROL UNIT
& ENCLOSURE
LINEAR ACTUATOR
(FOR ADDITIONAL FIRE
SUPPRESSION SYSTEM)
DETECTION DEVICE
(LHD)
OPTIONAL A/C
DEVICES
(AUX ALARMS,
HORNS, FANS,
MOTORS, PUMPS,
APPLIANCES, ETC)
AMEREX SUPPLIED
CABLES
RELAY MODULE
EOL
DETECTION DEVICE
(LHD)
PRESSURE SWITCH CIRCUIT
LINEAR
ACTUATOR
(2) ACTUATION CIRCUITS
(DISCHARGE ZONES)
MANUAL RELEASE CIRCUIT
(CLASS B)
(2) DETECTION CIRCUITS
(CLASS B) MANUAL PULL STATION
EOL

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Rev A (February 2018) HELIX™ PCU Fire Suppression System
2.7.1 STRIKE Control Unit & Enclosure (P/N 23826)
The Amerex STRIKE ECS Control Unit is an alarm initiating and release unit designed to function
without external power. The Control Unit utilizes two non-rechargeable batteries as a primary and
secondary (backup) power supply and will sustain itself for up to six months. The Control Unit and
batteries are housed within a protective stainless steel enclosure that can be mounted to a wall or
surface. The enclosure features a hinged, lockable door for internal access. All field wiring enters
the enclosure through electrical knockouts and terminates to the labeled terminal boards on the
Control Unit. Enclosure dimensions and features are shown below (See Figure 2.7.1a), along with
an open enclosure (See Figure 2.7.1b). Control Unit front face indicators and features are also
shown on the following page (See Figure 2.7.2/Table 2.7.2). All dimensions are in inches [mm].
3/4” [19.05]
ELECTRICAL
KNOCKOUTS (3)
3/4” [19.05] ELECTRICAL
KNOCKOUTS (3)
3/4” [19.05] ELECTRICAL KNOCKOUTS (3)
AUDIBLE
BUZZER
KEY LOCK
Figure 2.7.1a
STRIKE
CONTROL UNIT
Figure 2.7.1b 3/4” [19.05] ELECTRICAL
KNOCKOUTS (4)
MOUNTING HOLES (4)
PRIMARY BATTERY
SECONDARY BATTERY
GND
CABLE TIE
MOUNTS (2)

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HELIX™ Manual (P/N 26291) Chapter 2: System Components
Rev A (February 2018) HELIX™ PCU Fire Suppression System
Figure 2.7.2
15
6
5
10
17
7
32
14
8
11 1
16
9
STRIKE CONTROL
UNIT
12
13
4
2.7.2 STRIKE Control Unit Indicators & Features
STRIKE Control Unit Indicators/Features
1System Normal LED 10 Primary Battery Connection
2System Alarm - Actuation Zone 1 LED 11 Secondary Battery Connection
3System Alarm - Actuation Zone 2 LED 12 Secondary Battery
4Service System (Fault) LED 13 Primary Battery
5Alarm Silence LED 14 Computer Interface Port
6Battery Fault LED Alarm Buzzer Connection 15
7System Reset Button Terminal Board 1 (TB1): Detection, Release, Manual Pull &
Pressure Switch Circuits
16
8Alarm Silence Button
9Push To Test Button (Amerex logo) 17 Terminal Board 2 (TB2): Aux. FACP & Alarm Outputs
Table 2.7.2a
Control Unit Features/Specs Notes
Power Input Internal Lithium Batteries (Primary and Secondary)
(2) Detection Circuits, Class B Terminated with 470kΩ End of Line Device (EOL)
(1) Manual Pull Circuit, Class B Terminated with 470kΩ End of Line Device (EOL)
(2) Actuation Circuits Can be mapped to individual or both detection circuits
(1) Pressure Switch Circuit Terminated to NC Pressure Switch (closed under pressure) supplied with Amerex
HELIX Fire Suppression System
(1) PC Interface Circuit Used for STRIKE Control Unit programming, Monitor Mode, or Event Log
Auxiliary FACP Interface
Outputs with programmable
delay (Common)
Alarm (NO), Fault (NC) & COM contacts; FACP EOL resistor inputs
NO rated for 1A @ 30 VDC; NC rated for 0.5A @ 30 VDC (Power Factor 1.0)
Alarm: 0 second delay (default); Programmable delay 0 – 30 seconds
Fault: 5 second delay (default); Programmable delay 5 – 30 seconds
(3) Alarm Outputs with
programmable delay (Common)
For use with Relay Module (P/N 24695):
(1) Output with NC, COM contacts for Gas Valve operation
(2) Outputs with NO, NC, & COM contacts for optional device operation
NO rated for 1A @ 30 VDC; NC rated for 0.5A @ 30 VDC (Power Factor 1.0)
0 second delay (default); Programmable delay 0 – 30 seconds
Weight 4.12 lb (1.87 kg)
Table 2.7.2b