Greenheck Microprocessor Controller (475595 IOM) TAP v2.10 April 2014 (RVE, ERCH-01, ERT-01) - Manual (Page 18)

T
HIS SCREEN DISPLAYS THE SUPPLY FAN SPEED SET POINTS
.
This screen only appears if equipped with a supply fan VFD controlled by
microprocessor.
The Speed Set Point is the proportional percentage of the analog output from the
controller to the VFD.
0% Speed = Min Speed (determined by VFD)
100% Speed = Max Speed (determined by VFD)
UnOccupied Cycle - The supply fan speed when the unit is on during unoccupied
cycle times.
Possible Set Point Sources:
Local – The fan speed will be constant set from screen (exp. 100%).
BMS – The BMS can directly control the fan speed (requires BMS communication
option).
Duct Pressure – Fan speed is determined by duct pressure control loop.
Building Pressure - Fan speed is determined by building pressure control loop.
CO2 - Fan speed is determined by CO2 control loop.
Supply Fan Speed SetPt
Active: 100%
Source: Local 100%
UnOccupied Cycle 100%
(0%=Min Speed by VFD)
T
HIS SCREEN DISPLAYS THE ROOM SET POINTS DURING THE UNOCCUPIED MODE
.
This screen only appears if an unoccupied recirculation damper was provided with
the unit. Room sensor(s) must be wired to the controller.
In the unoccupied mode, the unit will monitor the room temperature and humidity
sensors. The unit will cycle on to maintain the unoccupied room set points by
tempering recirculated air. The differential prevents short cycling. For example, in
heating, the unit cycles on at 60°F and turns off at 65°F.
UnOcc Fan Cycle Setup
UnOcc Room Set Points:
Heating:
65.0°F
Cooling: 80.0°F
Room RH: 50.0%
Temp Diff: 5.0°F
Dehumid Diff: 5.0%
T
HIS SCREEN DISPLAYS THE TEMPERATURE AT WHICH THE UNIT WILL ENABLE FROST
CONTROL MODE IF NECESSARY . (F ACTORY D EFAULT = 5°F)
This screen only appears if the unit has an energy recovery wheel and a frost
control method was provided with the unit.
Upon sensing a high differential pressure across the energy wheel, the unit will go
into defrost if the outside air temperature is below this temperature setting.
Defrost
Allow wheel defrost
mode when outside
is below:
05.0°F
18 DDC Controller for Tempered Air Products
®