Unit Configuration; Adjust Time - Roberts Gorden CORAYVAC Installation Manual

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ROBERTS GORDON CORAYVAC
• Use this screen to check for successful Modbus
connection to the VFD. If the drives are communi-
cating properly via Modbus, the parameters will
populate with values accordingly.
• Set the manual run speed for VFD 1 and 2 here.
The VFD's can be manually operated by connect-
ing a switch to Input 4 for VFD 1 and Input 5 for
VFD 2. The manual speed is limited by the high
and low frequency programmed into the drive.
• Port 2a setup can be verified in this screen. Set-
tings should be Modbus and baud rate of 9600.

8.12 Unit Configuration

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M H C C
ODULATING EATING ONTROL
I M
ONTROLLER NSTALLATION ANUAL
• The default times for startup and post purge in
this section should not be altered.
• The first timer for VP1 runs the pump at 100% for
2 minutes at startup. When the heat request is
satisfied, the Post Purge timer runs the pump for
an additional 2 minutes. The Minimum Off timer
prevents the system from accidentally tripping an
APS alarm if it cycles OFF and back ON too
quickly.
• The Run Burner 1 at 100% timer is for Unitary
Modulating heaters. It runs the units at 100% for
180 seconds at startup.
• Next is an override feature for the Outside Air
Temperature Override the temperature to a
defined value if desired. The OAT Lockout will
force the equipment into an unoccupied state
(setback setpts), if the OAT exceeds the setpoint.
• Door Switches allow the user to disable burner
power if an input is tripped. The switches corre-
spond to Inputs 6 and 7 on the control board. The
NC or NO polarity of the switches can also be
adjusted. Note that the Door Switch must be
enabled here, and for each zone in the Configura-
tion - Zones screen.

8.13 Adjust Time

To adjust the controller time, go to <MENU>
< TOUCHSCREEN SYSTEM> < SETUP > < MODULE
SETUP > < SET TIME & DATE>.
Press <Save> when complete.