Honeywell RM7895A - Manual

This Installation Manual covers the Yamatake-Honeywell 7800 Series EC7895A and RM7895A relay modules, which serve as microprocessor-based burner controllers for gas appliances. The manual emphasizes safety, electrical specifications, and operational requirements, including grounding, wiring diagrams, and mounting instructions. It details critical aspects such as flame detection compatibility, environmental conditions, and compliance with approval standards like UL and CSA. Installation procedures focus on proper component assembly, wiring practices, and adherence to fire/explosion hazards, ensuring reliable burner control systems.

Page 1 – Product Overview and Features
Page 2 – Module Specifications and Ordering Information
Page 3 – Electrical Ratings and Terminal Specifications
Page 4 – Flame Detection System Compatibility
Page 5 – Sequence Timing and Accessories
Page 6 – Mounting Dimensions and Component Layouts
Page 7 – Ultraviolet Detector Dimensional Specifications
Page 8 – Safety Provisions and Internal Monitoring
Page 9 – Safety Checks and Installation Warnings
Page 10 – Installation Guidelines and Environmental Requirements
Page 11 – Internal Block Diagram and Wiring Instructions
Page 12 – Wiring Specifications and Diagrams
Page 13 – Component Wiring Diagram and Pin Assignments
Page 14 – Assembly Procedures
Page 15 – Installation Component Mounting Illustrations
Page 16 – Detector Wiring and Polarity Requirements
Page 17 – Operational Sequence and Ignition Trials
Page 18 – Module Testing Procedures
Page 19 – Jumper Settings and Static Test Checklist
Page 20 – Module Checkout and Troubleshooting
Page 21 – Flame Signal Measurement and Troubleshooting
Page 22 – Pilot and Main Burner Ignition Procedure
Page 23 – Burner Ignition Diagnostic Procedures
Page 24 – Flame Detection System Diagnostics
Page 25 – Ultraviolet Detector Diagnostics and Safety Shutdowns
Page 26 – Fault Announcement and Diagnostic Index
Page 27 – Operational Sequence Status Hold Information
Page 28 – Operational States and Lockout Conditions

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PRODUCT DATA

X-XX UL

7800 SERIES EC7895A, RM7895A

Relay Module

GENERAL

The Yamatake Honeywell EC7895A and RM7895 is a microprocessor
based integrated burner control for automatically fired gas, oil, or
combination fuel single burner applications. The RM7895 consists of
the Relay Module. Subbase, Amplifier and Purge Card. Options
include Keyboard Display Module, Personal Computer Interface,
DATA CONTROLBUS MODULE™, Remote Display Module, and
COMBUSTION SYSTEM MANAGER™ Software.

The EC7895 and RM7895 are programmed to provide a level of
safety, functional capability and features beyond the capacity of
conventional controls.

Functions provided by the EC7895 and RM7895 include automatic
burner sequencing, flame supervision, system status indication,
system or self-diagnostics and troubleshooting.

FEATURES

•

Safety features:
— Airflow switch check.
— Closed loop logic test.
— Dynamic AMPLI-CHECK®.
— Dynamic input check.
— Dynamic safety relay test.
— Dynamic self-check logic.
— Internal hardware status monitoring.
— Tamper resistant timing and logic.

•

Access for external electrical voltage checks.

•

Application flexibility.

•

Communication interface capability.

•

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 optional Keyboard Display Module.

•

Five (LEDs) for sequence information.

•

Interchangeable plug-in flame amplifiers.

•

Local or remote annunciation of EC7895 and RM7895
operation and fault information.

•

Nonvolatile memory; EC7895 and RM7895 retain history files
and sequencing status after loss of power.

•

Remote reset (optional).

•

Report generation (optional).

•

Selectable recycle or lockout on loss of airflow.

•

Selectable recycle or lockout on loss of flame.

•

Shutter drive output.

•

Burner controller data (optional):
— Flame signal strength.
— Hold status.
— Lockout/alarm status.
— Sequence status.
— Sequence time.
— Total cycles of operation.
— Total hours of operation.
— Fault history providing for the six most recent faults:

•

Cycles of operation at the time of the fault.

•

Fault message and code.

•

Hours of operation at the time of the fault.

•

Sequence status at the time of the fault.

•

Sequence time at the time of the fault.

— Diagnostic information:

•

Device type.

•

Flame amplifier type.

•

Flame failure response time.

•

Manufacturing code.

•

On/Off status of all digital inputs and outputs.

•

Selected prepurge time.

•

Software revision and version of EC7895 and RM7895
and optional Keyboard Display Module.

•

Status of configuration jumpers.

Contents

General .........................................................................................

Features ........................................................................................

Specifications ................................................................................

Ordering Information .....................................................................

Principal Technical Features .........................................................

Safety Provisions ..........................................................................

Installation .....................................................................................

Wiring ............................................................................................ 11
Assembly ...................................................................................... 14
Operation ...................................................................................... 17
Checkout ....................................................................................... 20
Troubleshooting ............................................................................ 26

65-0205

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About this manual

Brand: Honeywell
Model: RM7895A
Document type: Manual
Language(s): English
Pages: 28
File size: 1.4 MB
Format: PDF

Summary

Page 1 - Product Overview and Features

Introduction to the microprocessor-based burner control, technical specifications, capabilities, safety functions, and table of contents.

Page 2 - Module Specifications and Ordering Information

Electrical ratings, terminal descriptions with voltage and current limits, grounding requirements, ordering guidance, and contact information.

Page 3 - Electrical Ratings and Terminal Specifications

Voltage, frequency, power dissipation, fuse requirements, and detailed electrical ratings for each terminal including flame sensor and burner motor connections.