WaterFurnace Envision2 - Manual (Page 28)

28
ENVISION 2 COMPACT - 50 HZ INSTALLATION MANUAL
Aurora Base Control
Control Features
Single or Dual Capacity Compressors
Either single or dual capacity compressors can be operated.
Variable Speed ECM Blower Motor Option
A traditional variable speed ECM blower motor can be
driven directly using the onboard PWM output. Three
blower speeds are available based upon the G, Y1, and
Y2/W input signals to the board. The blower speeds can
be changed either by the variable speed ECM manual
configurations mode method or by using the Aurora AID
Tool directly. All three blower speeds can be set to the
same speed if desired.
5-Speed Blower Motor Option
A 5-speed blower motor will be driven directly using the
thermostat connections. Any three of the G, Y1, or Y2/W
signals can drive any of the 5 available pre-programmed
blower speeds on the motor.
Other Control Features
• Random start at power up
• Anti-short cycle protection
• High and low pressure cutouts
• Loss of charge
• Water coil freeze detection
• Air coil freeze detection
• Over/under voltage protection
• Condensate overflow sensor
• Load shed
• Dehumidification (where applicable)
• Emergency shutdown
• Hot gas reheat operation (where applicable)
• Diagnostic LED
• Test mode push button switch
• Two auxiliary electric heat outputs
• Alarm output
• Accessory output with N.O. and N.C.
• Modbus communication (master) (where applicable)
• Modbus communication (slave) (where applicable)
Field Selectable Options via Hardware
DIP Switch (SW1) – Test/Configuration Button (See SW1
Operation Table)
Test Mode
The control is placed in the test mode by holding the push
button switch SW1 for 2 - 5 seconds. In test mode most of
the control timings will be shortened by a factor of sixteen
(16). LED3 (green) will flash at 1 second on and 1 second off.
Additionally, when entering test mode LED1 (red) will flash
the last lockout one time. Test mode will automatically time
out after 30 minutes.
Test mode can be exited by pressing and holding the SW1
button for 2 to 5 seconds or by cycling the power.
Test mode will automatically be exited after 30 minutes.
Variable Speed ECM Configuration Mode
The control is placed in variable speed ECM configuration
mode by holding the pushbutton switch SW1 for 5 to 10
seconds, the high, medium, and low variable speed ECM
speeds can be selected by following the LED display lights.
LED2 (yellow) will fast flash when entering variable speed
ECM configuration. When setting low speed LED3 (green)
will be continuously lit, for medium speed LED1 (red) will
be continuously lit, and for high speed both LED3 (green)
and LED1 (red) will be continuously lit. During variable
speed ECM configuration mode LED2 (yellow) will flash
each of the 12 possible blower speeds 3 times. When the
desired speed is flashed press SW1, LED2 will fast flash until
SW1 is released. Low speed has now been selected. Next
select medium speed, and high speed blower selections
following the same process above. After third selection has
been made, the control will exit the variable speed ECM
configuration mode.
Reset Configuration Mode
The control is placed in reset configuration mode by
holding the push button switch SW1 for 50 to 60 seconds.
This will reset all configuration settings and the EEPROM
back to the factory default settings. LED3 (green) will turn
off when entering reset configuration mode. Once LED3
(green) turns off release SW1 and the control will reset.
DIP Switch (SW2)
SW2-1 FP1 Selection – Temperature limit setting for freeze
detection. On = -1.1°C; Off = -9.4°C.
SW2-2 FP2 Selection – Future Use
SW2-3 RV – O/B - thermostat type. Heat pump
thermostats with “O” output in cooling or “B”
output in Heating can be selected. On = O; Off = B.
SW2-4 Access Relay Operation (P2)
and 2-5
Controls - Aurora Base Control