ROBERTS GORDON
®
CORAYVAC
®
M
ODULATING
H
EATING
C
ONTROL
C
ONTROLLER
I
NSTALLATION
M
ANUAL
102
EIA-485, 2-wire
Wiring specifications
• A dedicated 24 AWG to 18 AWG twisted pair wire
(EIA-485).
• 2000’ (610 m) for 76.8 kbps.
• 3000’ (914.4 m) for 9600 bps, 19.2 or 38.4 kbps,
before needing a Repeater.
• Devices should be daisy chained and not star
wired.
• If the controller is at either end of a network seg-
ment, connect a terminating resistor (P/N
10061018) to the controller.
NOTE:
Use the same polarity throughout the
network segment.
6. Turn on power to control board.
Verify accuracy of the following:
Hardware settings for speaking N2:
• Baud rate DIP switches 4 and 5
• Protocol DIP switches 6, 7, and 8
• Jumpers set to half duplex (2-wire) and EIA-485
• Proper connection wiring
• BAS is configured to speak 2-wire EIA-485 to the
controller.
• BAS is sending requests to the proper slave
address of the controller.
• Unique rotary address switches 1 – 99. If control-
lers have duplicate addresses, network communi-
cation can be lost.
NOTES:
• If RX LED is solid, then the terminations are incor-
rect.
• If the network has greater than 32 devices or
exceeds 2,000' (609.6 m), a Repeater should be
installed.
• If a controller begins or ends a network segment,
a terminating resistor may be needed.
• The controller recognizes physical changes (DIP
switches, rotary switches and jumpers) upon
power up.
12.8 LonWorks
LonWorks (local operating network) is a networking
platform specifically created to address the needs of
control applications. A separate LonWorks card (P/N
10060160), photo below, is required for LonWorks
communication.
NOTE:
For connecting a controller to LonWorks pro-
tocol, contact Roberts-Gordon LLC to get a mapped
clipping file of controller program.
To set up the Modulating Controller for
LonWorks Option Card
1. Turn off power to control board.
2. Using the rotary switches, set a unique address.
3. Set the Comm Selector DIP Switches 1 - 8 for
baud rate, port number, wiring, and protocol.
• Set the Communication mode for Port 2 using DIP
Switch 3
Summary of Contents for CORAYVAC
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Page 69: ...SECTION 8 PROGRAMMING AND TROUBLESHOOTING THE SYSTEM 65 THIS PAGE LEFT INTENTIONALLY BLANK ...
Page 71: ...SECTION 9 TROUBLESHOOTING 67 FIGURE 26 Vacuum pump does not turn on ...
Page 75: ...SECTION 9 TROUBLESHOOTING 71 FIGURE 31 Burner troubleshooting in manual mode ...
Page 77: ...SECTION 9 TROUBLESHOOTING 73 After 45 second prepurge burners do not light continued ...
Page 81: ...SECTION 9 TROUBLESHOOTING 77 FIGURE 36 Air Pressure Switch alarm ...
Page 83: ...SECTION 9 TROUBLESHOOTING 79 FIGURE 38 Repeater troubleshooting ...
Page 85: ...SECTION 9 TROUBLESHOOTING 81 BACnet MS TP troubleshooting continued ...
Page 109: ...SECTION 13 TOUCHSCREEN TREE 105 Touchscreen Tree Overview continued ...
Page 111: ...SECTION 13 TOUCHSCREEN TREE 107 FIGURE 47 Maintenance Unit FIGURE 48 Alarms ...
Page 113: ...SECTION 13 TOUCHSCREEN TREE 109 FIGURE 51 Configuration Zones FIGURE 52 Configuration Unit ...
Page 115: ...SECTION 13 TOUCHSCREEN TREE 111 FIGURE 55 Touchscreen System FIGURE 56 Touchscreen Setup ...
Page 118: ...ROBERTS GORDON CORAYVAC MODULATING HEATING CONTROL CONTROLLER INSTALLATION MANUAL 114 ...