CleaverBrooks CB780 User Manual

INSTALLATION INSTRUCTIONS
32-00207-01
SIL
3
Capable
CB780/CB784
Relay Modules
APPLICATION
The Cleaver-Brooks CB780/CB784 (833-2718/833-
2720)
is a microprocessor based integrated burner control
for automatically fired gas, oil, or combination fuel single
burner applications. The CB780 consists of a Relay
Module and Keyboard Display Module. The CB784
consists of the Relay Module only. The Keyboard Display
Module is optional with the CB784. Subbase, Amplifier,
and Purge Card are required to complete the system.
Options include DATA CONTROLBUS MODULE™*, Remote
Display Mounting, First-Out Expanded Annunciator or
Modbus™ Module.
The CB780/CB784 is programmed to provide a level of
safety, functional capability and features beyond the
capacity of conventional controls.
Functions provided by the CB780/CB784 include
automatic burner sequencing, flame supervision, system
status indication, system or self-diagnostics and
troubleshooting
FEATURES
• Safety features:
— Interlock check.
— Closed loop logic test.
— Dynamic AMPLI-CHECK™.
— Dynamic input check.
— Dynamic safety relay test.
— Dynamic self-check logic.
— Expanded safe-start check.
— High Fire Purge Switch test.
— Internal hardware status monitoring.
— Low Fire Start Switch test.
— Tamper resistant timing and logic.
• Access for external electrical voltage checks.
• Application flexibility.
• Communication interface using Modbus Module
833-2820.
• Dependable, long-term operation provided by
microcomputer technology.
• First-out annunciation and system diagnostics
provided by a 2 row by 20 column Vacuum
Fluorescent Display (VFD) located on the Keyboard
Display Module (Optional on CB784).
Contents
Application ..................................................................................... 1
Features .......................................................................................... 2
Specifications ............................................................................... 2
Principal Technical Features .................................................. 6
Safety Provisions ......................................................................... 6
Installation ..................................................................................... 7
Wiring ............................................................................................... 10
Assembly ......................................................................................... 13
Operation ........................................................................................ 17
Static Checkout ............................................................................ 26
Troubleshooting ........................................................................... 26

CleaverBrooks CB780 Specifications

General

Brand	CleaverBrooks
Model	CB780
Category	Relays
Language	English