2 OF 12—FAN STATIC RESET KIT MKT-0266 MPC-1480 ©2010 Phoenix Controls Specifications subject to change without notice. Rev. 5/10
ORDERING GUIDE
APPLICATIONS
The Fan Static Reset (FSR) kit measures the pressure drop across select Accel II valves and passes this value across the network to
allow the BMS to potentially save energy by optimizing fan speed control. By continuously monitoring the static pressure at the
lowest point in the system, the BMS can trim fan speed as flow conditions and static pressure in the system changes. The intent is
to control the fans at the lowest practical speed to gain whatever energy savings is possible while ensuring there is sufficient static
pressure for the pressure independent cone assembly to maintain the desired flow.
The FSR is intended to be installed across the valves in the duct runs believed to be the "worst case" in terms of pressure loss. These
are typically the furthest from the fans or with the greatest number transitions, turns, or obstructions such as filter coils or dampers.
A review of the duct layout drawings can provide clues to the location of the valve that will see the lowest system pressure, however,
the lowest point may change based on different operational conditions. Spot checking may be the best way to determine the low
point or it may be prudent to select a number of locations to install FSRs and perform a low-select as system conditions vary.
The FSR100 is intended for installation on "Clean air" (Supply or General Exhaust) valves. The materials of construction of the
pressure pickup, tubing and the pressure sensor itself are not suitable for applications with corrosive or condensing vapors.
Additionally, the fume hood valve controller does not have inputs available for connecting the pressure sensor or network variables
for passing the value across the network. Therefore it should not be used on fume hood applications.
The FSR mounts on the valve base channel. The pressure pickups are installed in the duct work upstream and downstream of the
valve and the pressure sensor is connected to the power source and available universal input of the valve controller. Then the
Universal Input (UI) signal is scaled in the Configuration Plug-in program according to actual field measurements of pressure from
the sensor.
It is important to recognize accuracies, errors and tolerances, as well as response times throughout the entire sensing and control
system when choosing a static pressure control setpoint. If the total potential error (transmitter accuracy and temperature error) is
±0.1 inch W.C. and the valves have a 1 second speed of response while the fan speed controller may require 20 to 30 seconds to
respond to a change in setpoint, there must be sufficient safety margin in the setpoint to ensure the static pressure at the valve is
never compromised.
BASE NUMBER
FSR100 = Fan Static Reset Kit (includes the following)
1 - 0 to 5 inch W.C. differential pressure sensor with 0.25 to 4.00 Vdc output
2 - Pressure pickup
2 - Pressure dampers
2 - 6 foot (1.83 m) sections silicon tubing
1 - Mounting bracket
1 - Miscellaneous mounting hardware
FSR100
To Next Page
Loading...