FAQ

  1. How do I determine overpressure during a clean agent discharge?

    The leakage rate IS important because there is a direct correlation between leakage area and peak pressure.  If the leakage is small enough, every room will face destruction upon discharge. The reality is that most rooms are so leaky that the opposite is a problem. The agent typically leaks out so quickly that the enclosure doesn't pass the hold time requirements which means there is very little peak pressure which is why many systems do not require venting. For most FM200 systems there is a leakage range where the enclosure is tight enough to maintain sufficient hold time but not leaky enough to require vents. You'll only know if you're in that zone by performing a door fan test according to Annex C of NFPA 2001. ISO has a near identical Annex E.

    Both Standards require a peak pressure evaluation to determine whether or not the enclosure will be damaged upon discharge. Unfortunately neither standard provides the peak pressure formula. Traditionally, manufacturers of ine

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  2. Should I be concerned with air leakage into an attached garage?

    The big issue is exhaust getting into the house. Duct leaks from the supply side cause the house to have a negative pressure, which can cause air to get pulled in from the garage. Exhaust entering the home can be dangerous and can lead to health issues.

    The first step is to find what the maximum house depressurization would be with combinations of the airhandler on, closed bedroom doors, and any exhaust fans running. Do what you can to eliminate these pressures. Check to make sure there aren't any air intakes (returns) inside the garage.

    To determine how leaky the garage to house connection is test the house leakage at 50 Pa, then pressurize the garage to 50 Pa; if you see any drop in flow, there's a connection between the two.

    Next, depressurize the house and use a smoke puffer to test the garage to house connection. Seal everything between these two zones. 

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  3. Test data appears in red font. What does this mean?

    There are two cases when you will see red test data in FanTestic:

    1. Fan Pressure (flow pressure) is too low for the Range, which means you should change to a smaller, more restrictive, Range – During an Automatic test, the software would prompt you to change the Range in this case.
    2. During data collection, there was a data point collected as zero - This is caused by an instantaneous Fan pressure dropout, and the software displays this result in red to indicate data may have been skewed and should be retaken.

    If you did not receive a prompt to change Range, most likely the problem is #2. In this case, you should just click the "Clear point" button to clear that specific data point and you can re-input data back into that specific point using Semi-Automatic mode via the "Begin Semi-Automatic" button.

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  4. My computer cannot connect to the DM-2. How do I fix this?

    1. Make sure you have the DM-2 USB driver for the operating system version that matches the one on your computer (32bit or 64bit) installed on your computer.  You can see it listed in the Control Panel.
    2. Run the DM-2 Checker software that was installed with the USB driver.  There will be a shortcut to it in your Start menu of programs: 

      The DM2 Checker will open a window on your desktop, and continuously show the connection information about the DM-2 connected to your computer.
    3. Sometimes you will have to Right click on the DM2 Checker and “Run as Administrator” in order to get the DM2 Checker to run and find the gauges.  If you have to do this to run the DM2Checker, then you will have to carry out the "Run as
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  5. I am having problems with FanTestic Integrity software, how do I get help?

    FanTestic Integrity software  calculates hold time calculation for Enclosure Integrity for users in the fire suppression market.

    Please detail the specific sequence of steps that led you to arrive at the problems, as we cannot offer you a solution or fix them if we cannot understand how to reproduce them.

    Did you receive an error message? If so, what did it say? If you can reproduce the error message, please copy the error message details and reply with these details.

    This PDF gives details on what information is needed for us to be able to diagnose your problem, and where to find the information on your computer.

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  6. How do I determine overpressure during a clean agent discharge?

    The leakage rate IS important because there is a direct correlation between leakage area and peak pressure.  If the leakage is small enough, every room will face destruction upon discharge. The reality is that most rooms are so leaky that the opposite is a problem. The agent typically leaks out so quickly that the enclosure doesn't pass the hold time requirements which means there is very little peak pressure. This is why many systems do not require venting. For most FM200 systems there is a leakage range where the enclosure is tight enough to maintain sufficient hold time but leaky enough not to require vents. You'll only know if you're in that zone by performing a door fan test according to Annex C of NFPA 2001. ISO has a near identical Annex E.

    Both Standards require a peak pressure evaluation to determine whether or not the enclosure will be damaged upon discharge. Unfortunately neither standard provides the peak pressure formula. Traditionally, manufacturers of ine

    Read more »
  7. How do I fix the error: "The signature of this program is corrupt or invalid" when I try to install Retrotec software?

    This problem is often caused by anti-virus programs. In particular we have found that using Internet Explorer and a virus protection program from Microsoft called 'Windows Smartscreen'.

    Disable your anti-virus program, uninstall the earlier version and download and install the new version from the website:

    https://retrotec.com/software.html

    Read more »
  8. Do I use an Ethernet router or a switch with my DM32 for multiple fan tests?

    When I am setting up for a multiple fan test, do I use a router or a switch and how do I configure the DM32 gauges and my control computer (settings and wiring)?.


    Routers and switches are different kinds of networking equipment, and are not interchangeable.    

    A switch will for the most part just pass the traffic through. Switches can be used for multiplexing so you can get multiple inputs onto one output.  They can also be used as signal boosters so you can extend the length of your data connection.

    A router will dynamically generate IP addresses for devices connected to it.  The router will also multiplex and boost signal.

    When networking, it is important to understand what piece of equipment is in charge of generating the IP address for each device.  If there is a router anywhere in the network to which you are connecting gauges, that router will provide the IP addresses. 

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  9. Should I tape over the L ranges on my 1000/2000/3000 series fan?

    The L ranges on the fan are designed to be left open unless you are using L2 or L1.

    Covering those four 1 inch holes in the center of the C8 plate will cause range C1 to read about 25% higher and C2 to read about 12% higher flow.

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  10. When should I care about leakage around the door panel?

    Modular Panels are designed to be placed into doors that are not well sealed.  The panel leakage for the Modular Panel is about 14 square inches compared to about 3 square inches for the Aluminum Frame and Cloth and around 1 square inch of leakage for the upgraded Aluminum Frame with snap together corners.  These three panels represent three typical doorways: 

    1. Poorly weather-stripped which would have an approximate 1/16 inch gap which equals about 14 square inches leakage;  
    2. A well weather-stripped and adjusted door would be around 3 square inches or leakage; 
    3. A super tight door could be as tight as 1 square inch of leakage and can even have less.

    One rule of thumb is that all standards require the blower door panel to be leakier and never tighter than the existing door.  The Modular Panel qualifies here.  It is likely that the Aluminum Frame and Cloth are tighter than the existing door.  In e

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