Greenheck Microprocessor Controller (475595 IOM) TAP v2.10 April 2014 (RVE, ERCH-01, ERT-01) - Manual (Page 33)

T HIS SCREEN ALLOWS ADJUSTMENT OF THE FAN AIRFLOW PROVING SWITCH TIME
DELAY .
Since the unit is only part of a complete system, the airflow(s) may momentarily
change (ie. If a downstream damper closes). This delay is intended to prevent
false loss of airflow alarms. (Factory Default = 30 seconds)
Fan/Airflow Proving
Alarm delay: 30s
(inputs ID1 & ID5)
T HIS SCREEN ALLOWS ADJUSTMENT OF THE TIME DELAY FOR WHEEL ROTATION ALARM .
This screen only appears if an energy wheel was provided with the unit.
Similar to the Fan/Airflow Proving Switch alarm, the energy wheel rotation alarm
delay allows time to elapse prior to the controller showing an alarm. The delay
prevents a false alarm from occurring if the sensor does not sense the wheel
rotation for the allotted time.
Wheel Rotation Sensor
Alarm delay: 30s
(input ID3)
T HIS SCREEN ALLOWS ADJUSTMENT OF THE TIME DELAY BEFORE THE EXHAUST FAN
WHEN THE SUPPLY FAN STARTS .
This screen only appears if an energy wheel was provided with the unit.
The delay between the starting of supply and exhaust fans reduces the startup
amp draw of the unit. The exhaust fan engages first, allowing the energy wheel to
see space temperature conditions prior to the supply fan engaging. This allows
the wheel to provide maximum preconditioning of the outdoor air. This also
minimizes the potential of extreme outdoor air temperatures being supplied to the
space, prior to the cooling or heating engaging.
Fan Delay
Time delay between starting
of supply & exhaust fans.
Fan delay:
15s
T HIS SCREEN ALLOWS ADJUSTMENT OF THE FAN START DELAY .
This timer allows the damper time to open before the fan start sequence begins.
This prevents the fans from having to overcome higher static pressure when the
damper(s) are opening. (Factory Default = 10 seconds)
Damper Setup
Allow the dampers to open
for: 10 seconds before
starting the fans.
T
HIS SCREEN DISPLAYS ADDITIONAL PARAMETERS THAT MAY BE USED DURING
UNOCCUPIED FAN CYCLING
.
After the unoccupied heating set point has been satisfied, the supply fan will
continue to run for the Heat Off Delay.
On 100%OA MUA units, the OA damper can be configured to open to allow
unoccupied fan cycling.
Unoccupied Mode Setup
Type: Cycle Supply Fan
Source: Input ID6
Heat Off Delay: 60s
Open OA damper during
unocc cycle?:
NO
T
HIS SCREEN ALLOWS THE USER TO CHANGE THE TEMPORARY OCCUPANCY OVERRIDE
CONTACT FROM
M
OMENTARY TO
M
AINTAINED
.
The default temporary occupancy override functionality is a momentary contact
at ID6 that will override unoccupied mode for a user adjustable 1, 2, or 3 hours.
This screen allows the user to change the setting and allow the unit to override
unoccupied mode as long as the contact at ID6 is closed. This works well in
application that have a motion detector, rotary timers, etc.
Unocc Override Setup
Contact: Momentary
33 DDC Controller for Tempered Air Products
®