Anemostat EST - Manual (Page 19)

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1220 Watson Center Road • Carson, CA 90745
Tel: (310) 835-7500 • Fax: (310) 835-0448
www.anemostat.com • [email protected]
General Controller Information
Notes:
1. Minimum airflow with pressure independent controls based on the following minimum flow sensor signals:
5000-series - 1 VDC (see table 2)
3000-series - 0.03” w.g.
2. Pressure independent controls may be set for 0 CFM, at or above the minimum airflow shown, but not between.
3. 3000 series can be used either as direct or reverse acting for normally open or normally closed damper positions.
Field adjustable start point and reset span. The 3000 series is equipped with separate adjustable knobs for maximum
and minimum airflow settings.
4. 5000 series maximum and minimum airflow settings field adjustable at the thermostat.
REFER TO THE DOCUMENTATION PROVIDED ON THE WIRING/PIPING DIAGRAM ON THE TERMINAL FOR THE PROPER
FIELD ADJUSTMENT OF THE MINIMUM AND MAXIMUM AIRFLOW SETTINGS ON TERMINALS PROVIDED WITH
PRESSURE INDEPENDENT CONTROLS.
Some adjusting tips:
1. Allow sufficient time for the controller to respond to adjustments.
2. Cycling of the thermostat to check maximum and minimum airflow settings is often required.
3. On units with pneumatic controls, do not turn the adjustment knobs excessively.
Pneumatic Connections
1. Main air is supplied to the primary control box through the hole marked M. The thermostat is connected through the
hole marked T. The air flow measuring tubes are factory connected through the holes marked L and H.
2. Terminals that use pneumatic controls require a 20-30 psi supply of clean, dry, oil-free air.
Model 31 Pneumatic Controller
(Pneumatic Controls)
A pressure gauge or manometer is required for flow adjustment. Refer to Calibration Table 1 on the following page.
1. Connect pressure gauge or inclined manometer to the primary air flow taps. The upstream flow tap is connected to
the high pressure side of the gauge. The downstream flow tap is connected to the low pressure side of the gauge.
2. Refer to the Calibration Table for the pressure reading at the required CFM.
Primary Air Flow Adjustment
The thermostat-reset span is factory set at 5.0 psi. To field adjust the reset span follow these steps:
1. Remove the gauge tap cap at G and attach the 0-30 psi gauge.
2. Adjust the thermostat pressure to the T port to 20 psi.
3. Adjust the RESET SPAN knob until the gauge G pressure is equal to the desired reset span. This is total span
pressure, not ending span pressure.
4. Replace the gauge tap cap.
For Normally Open or Normally Closed dampers with either Direct or Reverse Acting thermostats, follow these steps:
1. The LO STAT is always calibrated first, with 0 psi on the T port. This air flow setting will be the desired minimum for
DA/Cooling or RA/Heating applications, or the maximum for RA/Cooling or DA/Heating.
2. The HI STAT is always calibrated second with 20 psi on the T port. This air flow setting will be the desired maximum
of DA/Cooling or RA/Heating applications, or the minimum for RA/Cooling or DA/Heating applications.
NOTE: The minimum inlet static pressure, as shown on the performance data charts, is required for proper operation.