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1. PRODUCT IDENTIFICATION
This document covers the following product, hereafter
referred to as "EA-1":
Model EA-1 Electronic Accelerator.
2. DESCRIPTIONS AND INTENDED USE
The accelerator is a quick-opening device designed for
use with select Viking Double Interlock Preaction
Systems with Electric/Pneu-Lectric Release and select
Dry Pipe Systems. The accelerator speeds up the
system valve operation by monitoring air/nitrogen
pressure twice per second. The accelerator must have
the solenoid valve and the EA-1 (which also serves as
the air supervisory switch) to function properly. Refer to
the following descriptions for further details.
2.1 Double Interlock Preaction Systems
The accelerator is designed to be used with two system risers on Double Interlock Preaction Systems with
Electric/Pneu-Lectric Release. It is approved for use with the Viking Model VXD Deluge Valve, the Model F Deluge
Valve (used on a Double Interlock Preaction system with Electric/Pneu-Lectric Release), and the VFR-500 Release
Control Panel.
2.2 Dry Pipe Systems
The Viking Model EA-1 is designed to be used with the following:
•
The Viking Model VXR Dry Valve.
•
The Viking Model F Dry Valve.
•
Up to four EA-1 switches on dry pipe system risers, plus one VFR-500 Release Control Panel.
2.3 Accelerator Features
•
The accelerator operates the preaction or dry pipe system within four seconds.
•
It is used with a VFR-500 Release Control Panel that has up to two Double Interlock Preaction Systems with
Electric/Pneu-Lectric Release or four dry pipe systems. For more details on the VFR-500 Release Control Panel,
see the VFR-500 technical data sheet F_081022.
•
It contains a low- and high-pressure supervisory alarm.
2.4 Accelerator Functional Description
The accelerator monitors the air/nitrogen pressure by using an internal pressure transducer that samples air/nitrogen
pressure twice per second. If the accelerator detects a severe drop in air/nitrogen pressure (greater than 0.1 PSI
(0.007 bar) per second) after taking three consecutive air/nitrogen samples, it will signal the VFR-500 Release Control
Panel.
F_041523 Rev 07 February 2025
TECHNICAL DATA SHEET
TECHNICAL DATA SHEET
MODEL EA-1 ELECTRONIC
ACCELERATOR
Page 1 of 25
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Summary of Contents for Viking EA-1
- Page 1 The accelerator is designed to be used with two system risers on Double Interlock Preaction Systems with Electric/Pneu-Lectric Release. It is approved for use with the Viking Model VXD Deluge Valve, the Model F Deluge Valve (used on a Double Interlock Preaction system with Electric/Pneu-Lectric Release), and the VFR-500 Release Control Panel.
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Page 2: System Operation
If the pressure drops at a rate of 0.1 PSI (0.007 bar) per second, the accelerator will activate. On a Viking Model VXR Dry Valve System or a Viking Model F Dry Valve System, the accelerator’s (solenoid’s) outlet air pressure is directed to the Viking Model VXR Dry Valve’s or Viking Model F Dry Valve’s intermediate chamber. As the air pressure increases in the dry valve’s intermediate chamber, the pressure differential is overcome. - Page 3 • Viking Model F Dry Valve System: 4" and 6" For more details on how the accelerator functions with the Viking Model VXR Dry Valve System or the Viking Model F Dry Valve System, refer to Section 3.2 above. F_041523 Rev 07 February 2025...
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Page 4: Technical Specifications
5 mA at 24Vdc Refer to Section 8.3 for Model VXR pressure setting details. 5.2 Rotary Switch Pressure Settings The following table shows the rotary switch air/nitrogen pressure settings, which are applicable for every EA-1 compatible system. Rotary Switch Air/Nitrogen Pressure Settings... -
Page 5: Installation Standards
6. EA-1 INSTALLATION ON VFR-500 6.1 Installation Standards Refer to current Viking technical data describing the components and installation standards for individual Viking Double Interlock Preaction Systems with Electric/Pneu-Lectric Release, Viking Model F Double Interlock Preaction System with Electric/Pneu-Lectric Release Systems, Viking Model VXR Dry Valve Systems, or Viking Model F Dry Valve Systems. - Page 6 REL+/ RTRN EOLD- EOLD+ Figure – 2: Dry Pipe System Wiring Between Accelerator and VFR-500 6.4 EA-1 Programming Instructions To seat/reset the VFR-500 Release Control Panel, do the following: • Press the Reset button on the VFR-500. • Press the ENT panel button.
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Page 7: Ordering Information
7. ORDERING INFORMATION 7.1 EA-1 and CoilKeeper (Alone) Figure – 3: EA-1 and CoilKeeper EA-1 and CoilKeeper For use with Viking Model F Double Interlock Preaction System with Electric/Pneu-Lectric Release (4", 6", and 8") System Type Part Number Model EA-1 Accelerator... - Page 8 Loose trim packages DO NOT include the model VXD Deluge Valve, riser check valve, pressure switch(es), or water supply control valve. These packages include the Model EA-1 Accelerator and the CoilKeeper. Refer to the trim diagrams for detailed component information. Refer to the trim diagrams for detailed component information.
- Page 9 27454 F_090624 The add-on package includes the EA-1, the CoilKeeper, and the required trim to install on a Model VXR Dry Pipe System. This package DOES NOT include the model VXR Dry Valve or trim, pressure switches, or water supply control valve. Refer to the trim diagrams for detailed component information.
- Page 10 Part Number Trim Diagram This kit includes required trim components to install the EA-1 and CoilKeeper on an existing dry pipe system that uses the Model F Dry Valve. NOTE: The VFR-500 Release Control Panel is required to control the EA-1 and CoilKeeper.
- Page 11 WATER SUPPLY Figure – 7: VXD Preaction System with Electric/Pneu-Lectric Release To place the Model VXD Double Interlock Preaction System with Electric/Pneu-Lectric Release (with the EA-1 and CoilKeeper) in service, follow the procedure below and refer to Figure 7 above.
- Page 12 Take necessary precautions to prevent damage. VXD Supervisory Alarm Low Air/Nitrogen Pressure Settings Refer to current Viking technical data describing the Model VXD Double Interlock Preaction System with Electric/Pneu-Lectric Release’s individual components. Also, refer to applicable installation standards, codes, and local jurisdictional requirements.
- Page 13 TECHNICAL DATA SHEET ACCELERATOR For air/nitrogen supply installation: • Use a compressor that will produce the required cubic feet per minute. (For more details, see the Viking technical datasheet F_052220.) • Ensure that the air/nitrogen supplies are clean, dry, and oil-free.
- Page 14 Viking Model F Double Interlock Preaction System with Electric/Pneu-Lectric Release Supervisory Alarm Low Air/Nitrogen Pressure Settings Refer to current Viking technical data describing the Viking Model F Double Interlock Preaction System with Electric/Pneu-Lectric Release Preaction System’s individual components. Also, refer to applicable installation standards, codes, and local jurisdictional requirements.
- Page 15 For air/nitrogen supply installation: • Use a compressor that will produce the required cubic feet per minute. (For more details, see the Viking technical datasheet F_020195.) • Ensure that the air/nitrogen supplies are clean, dry, and oil-free.
- Page 16 Page 16 of 25 MODEL EA-1 ELECTRONIC TECHNICAL DATA SHEET ACCELERATOR 8.3 Placing the Viking Model VXR Dry Valve System in Service TO SYSTEM PIPING SYSTEM PIPING NOT SHOWN WATER SUPPLY Figure – 9: VXR Dry Pipe System in Service Description (N.O.
- Page 17 MODEL EA-1 ELECTRONIC TECHNICAL DATA SHEET ACCELERATOR To place the Viking Model VXR Dry Valve System in service, follow the procedure below and refer to Figure 9 above: NOTICE The system must be completely drained before proceeding. NOTE: If preferred, press the Signal Silence button on the VFR-500 Release Control Panel to silence all buzzer outputs until placing the system in service.
- Page 18 Also, refer to applicable installation standards, codes, and local jurisdictional requirements. For air/nitrogen supply installation: • Use a compressor that will produce the required cubic feet per minute. (For more details, see the Viking technical datasheet F_112320). • Ensure that the air/nitrogen supplies are clean, dry, and oil-free.
- Page 19 NOT SHOWN WATER SUPPLY Figure – 10: Resetting the Model F Dry Valve To place the Viking Model F Dry Valve in service, follow the procedure below and refer to Figure 10. NOTICE The system must be completely drained before proceeding.
- Page 20 Page 20 of 25 MODEL EA-1 ELECTRONIC TECHNICAL DATA SHEET ACCELERATOR 4. Drain all water from the dry pipe system. If the system has operated, or if water has entered the system, open all auxiliary drains and the system test valve. Allow enough time to pass for the system to drain completely. Perform steps 4 through 10 below to set the dry valve and/or to inspect the dry valve’s internal operating parts.
- Page 21 PSI/bar in the system piping when the dry valve clapper is closed. For the exact maximum PSI/bar, refer to Viking technical data for the dry pipe system in use. 13. Open the dry air/nitrogen supply. When the system reaches approximately 10 PSI (0.7 bar), and while the system is in process of reaching its intended air/nitrogen pressure, “blow down”...
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Page 22: Specifications
Description The CoilKeeper™ Supervisory Switch is used on a preaction system or a dry pipe system when it includes the EA-1. It is designed to monitor the position of a coil on a solenoid electronically and to determine if the coil is installed on the valve stem. - Page 23 For more details concerning the CoilKeeper wiring diagram, refer to the manufacturer’s associated technical documentation. 10. CONTACT The Model EA-1 Accelerator is available through Viking distributors only. Contact your local Viking sales office, which can be found on our website: www.vikinggroupinc.com/locations...
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Page 24: Care And Handling
The owner is responsible for maintaining the fire protection system and devices in proper operation condition. According to NFPA, a system must undergo regular testing and inspection. Refer to current Viking technical data for details on individual components. Inspection frequency may vary due to contaminated or corrosive water supplies, corrosive atmospheres, and the condition of the air/nitrogen supply to the system. - Page 25 Page 25 of 25 MODEL EA-1 ELECTRONIC TECHNICAL DATA SHEET ACCELERATOR 2. When the system reaches its intended pressure and is stabilized, press the Reset button on the VFR-500 Release Control Panel to de-energize the solenoid valve. 3. Clear away dirt and debris from the fittings and nipples connected to the solenoid valve.
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