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OPERATION MANUAL
EPIC FAN CARD VOLUME CONTROLLER
WITH (GENTEQ EON) ECM MOTOR
Page 1 of
2
9/19 IOM-EPIC/ECM-EONK
REFER TO FIGURES 1, 2 & 3 AND USE THESE
INSTRUCTIONS IF YOUR FAN CARD RESEMBLES ONE
OF THESE. IF YOUR FAN VOLUME CONTROLLER CARD
LOOKS DIFFERENT, REFER TO another IOM-ECM. This IOM
refers to Nailor Part #’s H1-2272, H1-2272A1 and H1-2273A1.
LED INDICATORS
Power Indicator – A red LED located on the controller circuit
board indicates that the control card has 24 VAC present (light
will illuminate with higher than 18 VAC).
Airflow Indicator – A green LED located on the controller circuit
board flashes to indicate airflow volume. Each pulse is 100 cfm
(47.2 l/s). The last pulse is scaled. (ex. ½ pulse = 50 cfm)
RPM Limit Indicator – The green LED (same as airflow
indicator LED) will stop pulsing bright green and reduce itself
to a solid, dim glow as an indication that the motor is operating
at or above the RPM limit for that particular unit. This is not
an issue for some Nailor models and/or applications and can
be where the unit is designed to run in normal operation, for
instance a fan coil with multiple rows and high MERV rating filter
at maximum cfm of the model. For some models and application
such as Fan Powered Terminal Boxes where the box is not at
maximum cfm or multiple rows, this could be an indication that
filters should be checked for blockage or abnormally high static
pressure. This would be an indication that the RPM limit has
been reached. In either case review as needed per application.
SETTING AIRFLOW
(SEE TROUBLESHOOTING SECTION IF ISSUES ARISE)
Setting the Fan Airflow in the Manual Mode
1. Mode Selector Jumper must be in the "Manual" position.
2. Ensure there is a 24 VAC signal at the 24 VAC/GND terminals.
3. Attach the leads of a DC voltmeter to the "TP1+" and "TP2-"
pads on the Fan Card. Read the DC volts.
4. Refer to the Fan Calibration Table inside the line voltage
enclosure. Select the voltage that corresponds to the desired
airflow (cfm or l/s) set point.
5. Adjust the potentiometer on the Fan Card to the desired
voltage.
6. Breaking the power on the 24 VAC will cycle the fan.
Setting the Fan Airflow in the Dynamic Automation (0 – 10
VDC) Mode
1. Mode Selector Jumper must be in the "0-10V" position.
2. Ensure there is a 24VAC signal at the 24VAC/GND terminals.
3. A "0-10V" VDC input signal will determine the fan airflow at the
unit. Varying this signal will in turn vary the fan airflow. At less
than 0.50 VDC, the unit will turn off.
4. Note: When mode selector jumper is in the "0-10V" position
and the sequence of operation warrants turning the motor off
through the 24 VAC, the "hot" leg of the incoming power must
be broken. Breaking the GND/common leg will not turn the
motor off when the "0-10V" is connected to any controller.
OPTIONAL FSC - FAN STATUS (ON/OFF) CONTACT
CLOSURE (MOTOR BLOWER PROVING SIGNAL) ON
H1-2272A1 / H1-2273A1
1. A dry contact closure signal is provided at RLY terminals.
2. This signal can be used by the BAS for proving the motor
blower is running (200 RPM threshold).
ELECTRIC HEAT FAN INTERLOCK RELAY (FIR) (if equipped)
1. Air proving signal is provided to a relay in the heater control
circuit on models equipped with electric heat. This safety
interlock prevents the heater from energizing unless the fan is
energized and rotating at a minimum of 200 RPM.
2. This signal is used in the control scheme in lieu of a mechanical
air pressure switch.
NOTICE:
POWER MUST BE REMOVED FROM THE CONTROLLER
WHENEVER CONNECTIONS OR DISCONNECTIONS ARE
BEING MADE. FAILURE TO DO SO COULD RESULT IN
IRREPARABLE DAMAGE.
BEFORE PROCEEDING WITH ANY ADDITIONAL
TROUBLESHOOTING, ENSURE THAT THE POLARITY
OF THE 24 VAC SUPPLY TO THE CONTROLLER IS
CORRECT. (SEE FIGURE 1). IF THE POLARITY IS NOT
CORRECT, REMOVE THE CONNECTORS AND RECONNECT
OBSERVING PROPER POLARITY. RECHECK THE SYSTEM
FOR PROPER OPERATION.
1. With power off, inspect the unit to make sure that there are no
foreign objects blocking fan operation. Turn the blower wheel
by hand to verify that it moves freely.
2. Energize the unit at the disconnect switch. Adjust the controls
to call for the fan motor to run.
3. Then, turn the unit power back on and wait up to 20 seconds
for the motor to start.
TROUBLESHOOTING IN MANUAL ADJUST MODE
1. Confirm the jumper on the Fan Card is in the "MAN" position
for adjustment of fan speed at the unit.
2. If the motor does not run, turn off the power to the unit and
verify that the power plug and the control plug are firmly and
correctly attached to the motor.
3. If the motor still does not start, turn off power and unplug both
wiring harnesses from the motor.
4. Energize the unit. Check the AC voltage at the motor power
plug. IMPORTANT: Do not jam the voltmeter leads into the
connectors. This will damage the connectors. Insert the
probes into the plugs until they touch the pins. Do not
penetrate the pins. You should have full line voltage between
the neutral and power lines, or between the two power lines in
case of 208/240 VAC. If this is the case, go to step 5. If there
is not a full line voltage signal at this point, check the voltage
at the incoming power terminal block. If there is not a full line
voltage signal at this point, turn off the power to the unit and
have the electrician verify the power issue.
