CleaverBrooks 833-03517 User Manual

INSTALLATION AND OPERATING INSTRUCTIONS
32-00150-03
CB Manual Part Number 750-234
CB780E/CB784E Relay Modules
with Valve Proving
APPLICATION
The Cleaver-Brooks CB780E/CB784E (833-03517/833-
03518) is a microprocessor based integrated burner
control for automatically fired gas, oil, or combination fuel
single burner applications. The CB780E consists of a
Relay Module and Keyboard Display Module. The CB784E
consists of the Relay Module only. A subbase, Amplifier,
and Purge Card are required to complete the system.
Options include: DATA CONTROLBUS MODULE™, Remote
Display Mounting, First-Out Expanded Annunciator and
Computer Interface using Modbus™ network.
The CB780E/CB784E is programmed to provide a level of
safety, functional capability, and features beyond the
capacity of conventional controls.
Functions provided by the CB780E/CB784E include
automatic burner sequencing, flame supervision, system
status indication, system or self-diagnostics, and
troubleshooting.
The CB780E/CB784E offer the Valve Proving test feature.
Using the 833-2727 Keyboard Display (standard on the
CB780E), the following features can be set-up:
• Post Purge time—Up to 60 minutes—Device shipped
with 15 seconds Post purge
• Valve Proving features include:
—VPS test time
— When (Never, Before, After, Split or Both)
A new 4-line LCD display option S78000A1092/U is
available to be purchased separately. Reference document
32-00154 for more information.
See the 833-2727 Instructions (750-248) for its features.
Series 5 can be programmed for ModBus communication.
At commissioning time, the Valve Proving System may be
scheduled to occur at one of five different times:
• Never—Device default as received—Valve proving
does not occur.
• Before—Valve proving before run concurrent with
Pre-Purge.
• After—Valve proving occurs after the Run state,
before the device goes to Standby (Concurrent with
Post-Purge, if selected.)
• Both—Valve proving occurs at both times Before and
After, noted above.
• Split—The main valve 2 (MV2) (high pressure) seat
test is performed at the Before time and the main
valve 1 (MV1) (low pressure) seat test is performed
during the After time.

CleaverBrooks 833-03517 Specifications

General

Brand	CleaverBrooks
Model	833-03517
Category	Control Unit
Language	English

Summary

INSTALLATION AND OPERATING INSTRUCTIONS

APPLICATION

FEATURES

Safety Features

Includes safety interlock, closed loop logic test, dynamic AMPLI-CHECK, dynamic input check, and dynamic safety relay test.

PLUG-IN FLAME AMPLIFIERS

Flame Detection Systems

PRINCIPAL TECHNICAL FEATURES

Safety Shutdown (Lockout) Occurs

Details conditions causing safety shutdown during various operational periods.

SAFETY PROVISIONS

System Monitoring and Diagnostics

Covers hardware monitoring, logic tests, dynamic checks for safety and system integrity.

Switch Testing Procedures

WIRING

Proper Wiring

INSTALLING PLUG-IN FLAME SIGNAL AMPLIFIER

Installing the Flame Detector

VALVE PROVING SYSTEM

Valve Proving System Operation

Explains the systematic testing of valve seat integrity to detect leaks.

OPERATION

Sequence of Operation

Details the burner sequence steps: Initiate, Standby, Pre-Purge, Ignition Trials, Run, and Postpurge.

Ignition Trials—Pilot Lighted System

CHECKOUT

Flame Signal Measurement

Initial Lightoff Check for Proved Pilot

Pilot Turndown Test

Verifies the main burner can be lit by the smallest pilot flame that holds in the amplifier.

Initial Lightoff Check for Direct Spark Ignition

Direct Spark Ignition Test

Tests direct spark ignition for gas and oil burners, verifying proper sequence and flame establishment.

Safety Shutdown Tests (All Installations)

Safety Shutdown Test Procedures

Performs tests for Preignition Interlock, Lockout Interlock, and flame detection failures.

TROUBLESHOOTING

Blinking Fault Codes

Identifies fault codes based on LED blink patterns for system failure diagnosis.

APPENDIX A: Valve Proving Test

Valve Proving Test Procedure

Explains how to select sufficient valve test times to detect unacceptable leaks.